Inventors list

Assignees list

Classification tree browser

Top 100 Inventors

Top 100 Assignees


Feedback, transfer function or proportional and derivative (P& D) control

Subclass of:

701 - Data processing: vehicles, navigation, and relative location

701001000 - VEHICLE CONTROL, GUIDANCE, OPERATION, OR INDICATION

701036000 - Vehicle subsystem or accessory control

701041000 - Steering control

Patent class list (only not empty are listed)

Deeper subclasses:

Entries
DocumentTitleDate
20130030656STEERING METHOD AND STEERING SYSTEM FOR AN INDUSTRIAL TRUCK - A steering method for an industrial truck includes manually steering at least one steerable wheel with a steering transducer. The at least one steerable wheel is hydraulically connected or mechanically connected with the steering transducer. An angular position of the at least one steerable wheel is detected. At least one additional steerable wheel is motor-steered as a function of the detected angular position.01-31-2013
20130030655METHOD OF CONTROLLING A VEHICLE STEERING APPARATUS - A method for controlling a steering apparatus (01-31-2013
20130030654ELECTRIC POWER STEERING COMPENSATION FOR VEHICLES - Methods and systems are provided for controlling steering in a vehicle having an electric power steering system (EPS) with a steering wheel, the EPS configured to attenuate smooth road shake (SRS) for the vehicle. A first relationship is determined between a torque of the steering wheel and motions of the steering wheel while free of SRS excitation. A second relationship is determined between the torque and the motions with SRS excitation. A mapping is generated based on the first relationship and the second relationship via a processor for use in adjusting steering control.01-31-2013
20100161181METHOD AND DEVICE FOR MANAGING A TURNING SETPOINT APPLIED TO AT LEAST ONE TURNING ACTUATOR FOR THE REAR WHEELS OF AN AUTOMOBILE - A method for managing a turning setpoint applied to at least one turning actuator for rear wheels of an automobile including four steering wheels, the turning setpoint being generated by a turning control unit upon a braking situation with asymmetrical adhesion. The method calculates an intermediate turning setpoint of the rear wheels for compensating a yaw torque generated by a braking with asymmetrical adhesion of the four wheels, transmits an intermediate turning setpoint to the at least one turning actuator for the rear wheels, monitors the value of the intermediate turning setpoint using an acceptation module, and transmits to a braking control unit information generated by the acceptation module of the intermediate turning setpoint.06-24-2010
20080269989Power-assisted steering system - A power-assisted steering system, a control device, and a method for operating this power-assisted steering system in accordance with which a control device is supplemented with at least one function for driver assistance during off-road operation based upon an operating characteristic.10-30-2008
20090319128Method and System for Determining an Optimal Steering Angle in Understeer Situations in a Vehicle - A method for determining an optimal steering angle in understeer situations of a vehicle is described. To assist a driver in reliably stabilizing the vehicle during an understeer situation while driving, a model-based driving traction coefficient factor, a model-based kinematic factor, and a float angle are taken into account in the determination of a steering angle. A limited steering angle δ12-24-2009
20100057300Electric power steering apparatus - A motor drive circuit (03-04-2010
20090192680Steering System and Method for Quadrant Dependant Adapting of Return Torque - A method for generating a return torque signal in an electric servo steering system of a vehicle, including the steps of: determining a current steering wheel position; determining a current vehicle speed; generating a return torque signal as a function of the steering wheel position and the vehicle speed; determining a current directional relationship between a torque exerted on the steering wheel and a speed of steering wheel rotation; determining a scaling factor dependent on the directional relationship; and multiplying the return torque signal by the scaling factor in order to obtain a modified return torque signal. Also, a servo steering system which is designed to carry out such a method.07-30-2009
20090192679CONTROL APPARATUS FOR ELECTRIC POWER STEERING APPARATUS - The present invention provides a control apparatus for an electric power steering apparatus comprises: a steering assist command value calculating section; a current control section that calculates a voltage command value; and a motor driving section that drives a motor based on the voltage command value, wherein an assist power from the motor is applied to a steering system, the control apparatus is characterized in that an SAT measuring section, that inputs an angular speed and an angular acceleration of the motor, the steering assist command value and the torque signal therein so as to estimate an SAT, is provided, and the SAT obtained by the SAT measuring section is feedbacked to the steering assist command value via a feedback section composed of a phase compensating section and a gain section.07-30-2009
20110196576METHOD FOR STEERING ASSISTANCE DURING AN EMERGENCY MANEUVER - A method for steering assistance of a motor vehicle driver of a motor vehicle in dangerous situations. The vehicle is equipped with a mechanism which influences its steering device and a vehicle environment detection mechanism. A trajectory calculation unit calculates driving cases of all drivable and stable movement trajectories on the basis of the data of the vehicle environment detection mechanism. A mechanism detects and evaluates a current steering wheel actuation with regard to the presence of a dangerous situation, wherein, when a dangerous situation is detected, the movement trajectory from the currently determined driving case is determined which corresponds to the driving maneuver that is indicated by the associated current steering wheel actuation, and the driver is assisted, by way of the mechanism which influences the steering device, in continuing the driving maneuver as a function of the determined movement trajectory.08-11-2011
20110196575Forced steering - A forced steering arrangement for steering a vehicle trailer coupled to a towing vehicle includes a measuring device for determining a pivot angle between the towing vehicle and the vehicle trailer, a control device having an input coupled to the measuring device and an output, and a steering device coupled to the output of the control device for turning the wheels of at least one steered axle of the vehicle trailer. The measuring device is also configured to determine a twist between the towing vehicle and the vehicle trailer.08-11-2011
20100152974SYSTEM AND METHOD FOR MONITORING DRIVER FATIGUE - An apparatus and method for monitoring driver fatigue and inattention. A device introduces a controlled disturbance requiring driver compensation into a steering system of a vehicle and monitors for an expected driver compensation in response to the disturbance. When the actual compensation does not sufficiently match the expected compensation the driver is alerted and vehicle functions can automatically be activated or reduced.06-17-2010
20090125187CONTROL UNIT OF ELECTRIC POWER STEERING APPARATUS - In a control unit of an electric power steering apparatus for driving a motor with a current command value and giving an assist torque to a steering mechanism by driving the motor, the control unit is provided with a motor angle sensor; a torque sensor; a relative steering angle detecting section for detecting a relative steering angle; a steering angular speed detecting section for detecting an angular speed of the motor; a vehicle speed determining section; a neutral point calculating section for determining that a vehicle is being driven straightly, and calculating by considering that the relative steering angle when the straight driving continues for not less than a predetermined time is a neutral point; and an absolute steering angle calculating section for calculating an absolute steering angle with a difference between the neutral point and the relative steering angle.05-14-2009
20110202240DYNAMIC RANGE DISPLAY FOR AUTOMOTIVE REAR-VIEW AND PARKING SYSTEMS - A dynamic range display system for a vehicle. The system includes a camera, a distance sensor, a display, and a controller. The camera is configured to capture an image and to generate a signal representative of the image. The distance sensor is configured to detect an object of interest within a path of the vehicle and to generate a signal that identifies a distance between the vehicle and the object of interest. The display is configured to provide a visual image, and the controller is configured to receive the signal from the camera and the signal from the distance sensor. The controller generates an image on the display representing the image detected by the camera and a dynamic vehicle path line overlaid over the camera image. The dynamic vehicle path line provides an indication of a distance between the vehicle and the object of interest.08-18-2011
20120245798VEHICLE COLLISION AVOIDANCE SYSTEM - A collision avoidance system for a machine is disclosed including an obstacle detection system configured to detect an obstacle. The collision avoidance system also includes a display configured to provide information to an operator. The collision avoidance system further includes a controller in communication with the obstacle detection system and the display. The controller is configured to control the display to indicate an obstacle detection based on information received from the obstacle detection system and determine a ground speed of the machine. The controller is also configured to determine a distance since the ground speed of the machine was last at a threshold speed and suppress the indication of the obstacle detection based on the distance since the ground speed of the machine was last at the threshold speed.09-27-2012
20120245797STEERING APPARATUS, STEERING METHOD, AND COMPUTER READABLE STORAGE MEDIUM - A target value for yaw angle velocity gain is computed according to a map expressing a relationship between steering wheel angle and yaw angle velocity gain predetermined such that a direction as seen from a driver of a target destination point for vehicle travel at a predetermined time after a forward gaze and a direction as seen from the driver are caused to match each other, and a steering gear ratio is controlled accordingly. A target value for a steering wheel torque corresponding to the detected steering wheel angle and the acquired yaw angular velocity is set, based on a relationship between yaw angular velocity and resistance-feel level predetermined such that the resistance feel level for a driver monotonically increases with increasing yaw angular velocity. Control is then preformed so as to realize the steering wheel torque target value.09-27-2012
20130079992POWER STEERING SYSTEM - While drive control of an electric motor is being executed in a normal mode, when a duration of a state where a vehicle speed is lower than or equal to a threshold, a steering angular velocity is lower than or equal to a threshold and a motor current is smaller than or equal to a threshold is longer than or equal to a first predetermined time defined by a threshold, a control mode is changed to a power-saving mode. Thus, a target rotation speed of the electric motor is changed from a first target rotation speed to a second target rotation speed.03-28-2013
20130079991MOTOR VEHICLE, IN PARTICULAR AUTOMOBILE, AND METHOD FOR CONTROLLING A MOTOR VEHICLE, IN PARTICULAR AN AUTOMOBILE - A motor vehicle and a method for controlling a motor vehicle in road traffic are provided. A motor vehicle includes a driver assistance system and a navigation means comprising a sensor for detecting compressive forces, or tensile forces, or torsional forces. An evaluation unit is coupled to the navigation means and evaluates the signals of the sensor. The evaluation unit puts the driver assistance system into operation or takes it out of operation when a threshold value of the signals stored in the evaluation unit is exceeded or fallen below. A controller is activated when the threshold value is exceeded or fallen below and transfers at least partial control of the motor vehicle by the driver assistance system to manual operation by a driver or transfers the manual control of the motor vehicle to at least partial control by the driver assistance system.03-28-2013
20130079993CONTROL UNIT FOR VEHICLE STEERING SYSTEM - A vehicle steering system includes: an electric motor that applies a torque to a steering shaft with the use of field units that differ in number of turns; and a control unit that controls the torque of the electric motor on the basis of a steering torque that is a torque input to the steering shaft in response to an operation of a steering wheel. The control unit controls at least one of motor currents that are supplied to the field units of the electric motor.03-28-2013
20090082925Electric Power Assisted Steering Yaw Damping Method - The invention relates to a method and an apparatus for electrically controlled assistance to a vehicle In order to stabilize a vehicle in the event of oversteering, the invention provides that a nominal yaw damping torque is determined and is multiplied by an oversteer signal such that an additional torque is produced which is added, via an actuator in an electrically assisted power steering system, to its nominal torque, and is introduced into a vehicle steering system.03-26-2009
20130041557AUTOMATIC STEERING APPARATUS - An automatic steering apparatus that can suppress steering wheel vibration and that can also smooth angular control. In the automatic steering apparatus, a motor that steers steered wheels is controlled by a control unit. Information from an angle sensor that generates a signal that corresponds to a steering angle of the steered wheels is sent to the control unit. The control unit corrects a target steering angle of the steered wheels such that angular acceleration of the target steering angle is less than or equal to a limiting value. The control unit controls the motor such that the steering angle of the steered wheels tracks the corrected target steering angle based on the information from the angle sensor.02-14-2013
20100100282STRATEGY METHOD FOR REDUCING ENERGY CONSUMPTION OF A MOTOR VEHICLE - A method for reducing energy consumption of a motor vehicle having a power steering system including a electro-pump device (GEP) and for establishing set speeds of the electro-pump device depending on parameters of the operation of the vehicle, intended to be applied to the electro-pump device during a normal operating mode. At least one additional specific operating mode is defined, during which the speed of the electro-pump device is reduced to a level where the driver does not yet experience discomfort during driving and applies to the electro-pump device suitable set speeds when the vehicle operates according to the specific operating mode.04-22-2010
20090157262Method and apparatus for controlling lateral stability of vehicle - The present invention provides a method and apparatus for controlling the lateral stability of a vehicle. The apparatus stabilizes the behavior of the vehicle when a lateral disturbance occurs. The apparatus includes a lateral disturbance detection unit, a target yaw rate computation unit, and a vehicle yaw rate control unit. The lateral disturbance detection unit detects a lateral disturbance. The target yaw rate computation unit calculates a driver's steering angle when the lateral disturbance is detected, and calculates a target yaw rate using the calculated driver's steering angle, and vehicle information, including vehicle behavior information and vehicle specification information. The vehicle yaw rate control unit controls a vehicle yaw rate so as to attenuate a turning moment attributable to the lateral disturbance, thereby causing the controlled vehicle yaw rate to converge on the calculated target yaw rate.06-18-2009
20090157261VEHICLE STEERING APPARATUS - A vehicle steering apparatus that can prevent a large returning torque from acting when a steering wheel is turned. Through processing of an assist control program, rotational torque (assist torque) of an electric motor is calculated by adding returning torque g*Trto to turning torque Tc (in actuality, subtracting the returning torque g*Trto from the turning torque Tc). The electric motor is driven and controlled in accordance with the calculated assist torque. When the steering torque is large, the calculated returning torque gain g decreases, and therefore, the returning torque g*Trto decreases or becomes zero. With this control, the greater the force (torque) required to operate the steering wheel, the smaller the influence of the returning torque, and steering feel at the time of turning the steering wheel is improved.06-18-2009
20100106375Steering system and method for independent steering of wheels - A steering system comprises a steering wheel adapted to receive a driver's rotational input. Left and right wheel units are rotatable along a steering angle for adjusting a direction of the vehicle during the driving movement. A steering mechanism converts the rotational input to a variation of the steering angle of the wheel units. The steering mechanism comprises a steering shaft connected to the steering wheel, and gear steering units for each said wheel unit. The gear steering units are connected to the steering shaft for mechanically converting the rotational input to steering outputs for both said wheel units to concurrently vary the steering angle of said wheel units. Independent steering units for each wheel unit each adjusting the steering angle of a respective one of the wheel units independently from the rotational input and from the other wheel unit.04-29-2010
20120215406DEVICE FOR CONTROLLING VEHICLE TRAVEL - A travel control device for a vehicle provided with: a steering angle control device that alters the relationship between the amount of steering operation of a driver and the steering angle of steerable wheels; a trajectory control device that controls the travel trajectory of the vehicle by means of controlling the steering angle of the steerable wheels; and a turning condition control device that determines a target turning condition control level for causing the turning condition of the vehicle to be a target turning condition, and controls the turning condition of the vehicle on the basis of the target turning condition control level. A turning condition control device calculates the target turning condition control level on the basis of the amount of steering operation of the driver and the control level of the trajectory control device, and thereby reflects in the target turning condition control level changes to the steering angle resulting from the control of the traveling trajectory.08-23-2012
20120185133Method For Speed Based Control Of An Implement Steering System - A method for disabling the implement steering system of a towed implement includes monitoring a speed of the implement and if the speed exceeds a predefined limit, automatically disabling the implement steering system.07-19-2012
20090125191Power Steering Apparatus - A power steering apparatus includes a power cylinder; a reversible pump; first and second hydraulic passages; a reservoir tank; a first supply passage arranged to supply the hydraulic fluid through the reversible pump to the second hydraulic passage; a first one-way valve provided in the first supply passage; a second supply passage arranged to supply the hydraulic fluid through the reversible pump to the first hydraulic passage; and a second one-way valve provided in the second supply passage. A Reynolds number of a flow in the first one-way valve is equal to or smaller than 2300 when a flow rate per unit time of the flow in the first one-way valve is maximum. A Reynolds number of a flow in the second one-way valve is equal to or smaller than 2300 when a flow rate per unit time of the flow in the second one-way valve is maximum.05-14-2009
20090125190Power Steering Apparatus - A power steering apparatus includes a power cylinder including first and second pressure chambers; a reversible pump including a first outlet port and a second outlet port; a first hydraulic passage including a portion made from an elastomer; a second hydraulic passage including a portion made from an elastomer; a motor arranged to drive the reversible pump; a motor control section; a pump reverse rotation judging section configured to judge a reverse rotation state of the reversible pump when an actual rotation direction of the reversible pump does not correspond to a direction in which the motor is rotated by the driving signal from the motor control section; and a damping torque adding section configured to damp a torque generated in the reversible pump when the pump reverse rotation judging section determines the reverse rotation state of the reversible pump.05-14-2009
20090125189Power Steering Apparatus - A power steering apparatus includes: a steering mechanism connected with a steering wheel; a transmitting mechanism connecting the steering mechanism and a steered wheels; a motor arranged to drive the transmitting mechanism based on a torque inputted to the steering mechanism to provide a steering assist force to the steered wheels; a motor control section configured to output a drive signal to the motor in accordance with the steering assist force; a motor reverse rotation judging section configured to judge a reverse rotation state of the motor when an actual rotation direction of the motor does not correspond to a direction in which the motor is rotated by the driving signal from the motor control section; and a damping torque adding section configured to damp a torque generated in the motor when the motor reverse rotation judging section determines the reverse rotation state of the motor.05-14-2009
20090125188Method of Determining an Assist Torque Set-Point Value for an Electric Motor Driven Power Steering System - A method of determining an assist torque set-point value for an electric motor driven power steering system that is a function of a steering torque, a vehicle speed and an angular velocity of the steering system motor.05-14-2009
20130046442MOTOR VEHICLE STEERING SYSTEM - A motor vehicle steering system includes a knob for rotationally manipulating a steering member and a knob reaction force actuator for giving a reaction force in response to the rotation of the knob. The knob has a knob center and is supported by the steering member in a manner rotatable about the knob center. Holding the knob and manipulating the steering member causes the knob to rotate (spin) about the knob center as the steering member rotates. The knob reaction force actuator then gives an appropriate reaction force in response to the rotation (spinning) of the knob.02-21-2013
20090043453Electric power steering system - An electric power steering system in which a current command for a brushless DC motor is determined based on a detected steering torque, a voltage to be applied is determined based on a difference between the current command value and a current value flowing to the motor, and steering assist is implemented by applying the voltage so determined to the motor. A rotational angular velocity is computed based on a detected rotor position, and it is determined that the motor is abnormal when a rotational angular velocity determination unit determines that the rotational angular velocity is equal to or less than a predetermined value, a current command value determination unit determines that the current command value is equal to or less than a predetermined value, and a voltage determination unit determines that the voltage applied to the motor falls out of a predetermined voltage range.02-12-2009
20110010055CONTROL SYSTEM AND WORKING MACHINE COMPRISING THE CONTROL SYSTEM - A control system for a working machine includes a device for changing direction of the working machine, an operator controlled lever, and an electronic control unit adapted to receive an input signal indicative of desired direction from the position of the operator controlled element and to generate an output signal for producing a change of direction of the working machine, corresponding to the position of the operator controlled element, via said device. The control system includes an electronic safety device adapted to be controlled by the position of the operator controlled element and adapted to allow control of the device via the output signal and to block control of the device via the output signal, respectively, depending on the position of the operator controlled element.01-13-2011
20110010054CONTROLLING MOTORS IN ELECTRIC POWER ASSISTED STEERING SYSTEMS - A method of controlling an electric motor in an electric power assisted steering system, the motor being arranged so as to apply a force to part of a steering mechanism of a vehicle, in which the method comprises calculating a force demand indicative of an assistance force dependent upon the torque applied by a user (T01-13-2011
20110010053METHODS AND SYSTEMS FOR END OF TRAVEL HARSHNESS REDUCTION - A control system for controlling a steering system is provided. The control system includes a first module that estimates a command adjust value based on a current position of a hand wheel of the steering system relative to an end of travel region. A second module generates a motor assist command based on the command adjust value to control the steering system.01-13-2011
20100138112VEHICLE STEERING CONTROL DEVICE AND METHOD - Under an automatic turning control, a steering controller defines a value of steering angle set according to a target turning angle of the automatic turning control, as a value of steering angle at which a reaction force is equal to 0. Thereby, the steering controller controls a steering reaction force on the basis of a difference between an actual steering angle and the value of steering angle at which the reaction force is equal to 0.06-03-2010
20100138111ACCELERATION COMPUTING APPARATUS AND ELECTRIC POWER STEERING APPARATUS - An acceleration computing apparatus or electric power steering apparatus including wheel speed sensors for detecting original wheel speed of a right front wheel and a left front wheel of drive wheels and wheel speed sensors for detecting original wheel speed of a right rear wheel and a left rear wheel of driven wheels. If it is determined that ABS control is in operation, vehicle speed is calculated based on the wheel speed of the maximum speed of the wheel speed of all wheels. If it is determined that ABS control is not in operation, the vehicle speed is calculated based on the wheel speed of the maximum speed of the wheel speed of the driven wheels. Longitudinal acceleration of the vehicle is computed based on the vehicle speed computed in such a manner.06-03-2010
20090326762DEVICE AND METHOD FOR MONITORING THE TURN COMMAND TO A STEERED REAR WHEEL - A device and method for monitoring a turn command to a steered rear wheel of a vehicle with at least three steered wheels, in which a steering angle datum value for the steered rear wheel is compared against a template, the comparison being made by a computer that generates the datum value.12-31-2009
20090306856Driving dynamics control adapted to driving conditions and based on steering interventions - A device for controlling the driving dynamics of a vehicle senses at least one driving condition variable being representative of a driving condition and has a driving dynamics controller for determining an additional steering angle, according to which a steering motion can be carried out in addition to the steering motion commanded by an operator.12-10-2009
20100100284STEERING ASSIST APPARATUS - A steering assist apparatus of a vehicle includes: a lane set unit to recognize an environment of ahead the vehicle; a deviation determination unit to determine whether the vehicle has a deviation tendency from a traveling lane; a steering control unit to apply steering force in a deviation avoiding direction to the steering mechanism when it is determined that the vehicle has a deviation tendency; a neighboring vehicle detection unit to detect a neighboring vehicle, which travels ahead of the vehicle in a lane next to the traveling lane of the vehicle; and an approach degree calculation unit to calculate an approach degree of the neighboring vehicle toward the vehicle. When the vehicle has a deviation tendency in a direction away from the traveling lane of the neighboring vehicle, the steering control unit reduces the steering force in the deviation avoiding direction according to an increase of the approach degree.04-22-2010
20100100283METHOD FOR POWER STEERING SYSTEMS - A method for controlling a steering system of a vehicle is provided. The method includes receiving a measured hand wheel torque signal indicating a measured hand wheel torque of the steering system. A desired hand wheel torque signal is generated, the desired hand wheel torque signal being indicative of a desired hand wheel torque for the steering system. A hand wheel torque tracking error signal based on the measured hand wheel torque signal and the desired hand wheel torque signal is then calculated. To adjust an amount of motor torque applied to the steering system, a desired compensation torque signal is generated based on the hand wheel torque tracking error signal multiplied by a calibration constant.04-22-2010
20130073147VEHICLE STEERING SYSTEM AND LOADING VEHICLE - A vehicle steering system includes a steering angle detecting unit; a reaction force actuator; and a reaction force actuator control unit. The reaction force actuator control unit determines whether the steering angle detected by the steering angle detecting unit is within a first steering angle range where the steering angle is smaller than or equal to a first change angle or a second steering angle range where the steering angle is larger than the first change angle, and controls the reaction force actuator such that the steering reaction force is increased to a maximum value with an increase in the steering angle when the steering angle is within the first steering angle range and the steering reaction force is monotonically decreased from the maximum value with an increase in the steering angle when the steering angle is within the second steering angle range.03-21-2013
20100017062Angle Measuring Apparatus for Measuring An Absolute Angular Position - An angle measuring device for measuring an absolute angular position is described herein. The angle measuring device comprises a flexible pulling element guided directly or indirectly via a shaft whose angle of rotation (φ) is to be detected, with different circumferential speeds (v01-21-2010
20090271074Yaw Stability Control System - The present invention relates is a yaw stability control system for a vehicle using a steering system and a method of controlling by detecting the occurrence of understeer, determining the degree of understeer after the occurrence of understeer is detected determining if the determined degree of understeer exceeds a threshold value, saving the steering wheel torque value and steering wheel angle value when determined that a calculated drop in steering wheel torque exceeds the threshold value, calculating a guidance torque, a driver-intended steering wheel angle, and updating the steering wheel angle at the start of the guidance torque calculation, applying the guidance torque to the steering of the vehicle, and using the driver-intended steering wheel angle for yaw stability control.10-29-2009
20130060426ELECTRIC POWER STEERING CONTROL DEVICE - In an electric power steering control device, a target assist torque calculation unit calculates a target assist torque or a target current, and a current control unit calculates a basic current instruction so that an actual current Im flowing in an electric motor becomes equal to the target current. An output of the unit is adjusted on the basis of an output of a stable current compensation unit. The unit uses a transfer function Gi expressed by using a differential operator s of not more than fourth order terms. The unit generates a compensation instruction on the basis of the actual current Im in order to produce stable operation of the entire system. A motor drive unit receives a current instruction adjusted on the basis of the compensation instruction, and controls the current flowing in the electric motor.03-07-2013
20130060427ELECTRIC POWER-STEERING CONTROL DEVICE - A base assist section generates a base assist command so that a steering reaction according to a road surface reaction returns to a steering wheel side. A modifying section generates a torque modifying command for modifying the base assist command so that an unstable movement of a vehicle converges appropriately. A sum of the each command becomes a final assist torque command. The base assist section estimates a road surface force based on the self-generated base assist command and a steering torque actually detected. A target steering torque is generated based on the estimated force, and the base assist command is generated based on a deviation of the target steering torque and the steering torque.03-07-2013
20090299575ELECTRIC POWER STEERING APPARATUS - An electric power steering (EPS) apparatus 12-03-2009
20090299574Car Steering System - A steering system for a car having two front direction wheels and a number of electronic dynamic-performance control devices; the steering system has a steering wheel for controlling a turn angle of the front direction wheels, and a power-assist device which generates a power-assist torque which is added to the torque exerted on the steering wheel to vary the turn angle of the front direction wheels; the power-assist device has a control unit, which determines operation of the electronic dynamic-performance control devices, and modifies the power-assist torque as a function of operation of the electronic dynamic-performance control devices.12-03-2009
20090287377VEHICLE BODY DRIFTING SUPPRESION DEVICE - A vehicle body drifting suppression device including a steering torque detection unit which detects a steering torque of a vehicle, wherein a vehicle body drifting suppression is performed according to a vehicle body drifting suppression control-amount, and the vehicle body drifting suppression control-amount is adjusted according to a temporal sustention status of the steering torque.11-19-2009
20090281692ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus includes a steering assist section that applies assist force to a steering system of a vehicle to assist operation of a steering wheel performed by a driver. The steering assist section is actuated by a motor. When there is an abnormality in a steering torque sensor, the supply of drive power to the motor is controlled such that a converted steering angle, which is obtained by converting the rotational angle of the motor, follows a target steering angle, which is computed based on the steering angle of the steering wheel by operation performed by the driver.11-12-2009
20090069979STEERING ASSISTANCE DEVICE FOR VEHICLE - A steering assist apparatus for a vehicle includes an electric motor for steering assist. Rotation output of the electric motor is reduced in speed by a ball-screw mechanism and converted to rectilinear motion, which is transmitted to a rack bar. An electronic control unit determines a target current value in accordance with a steering torque detected by a steering torque sensor and a vehicle speed detected by a vehicle speed sensor. While using an actual current value of the electric motor detected by a current sensor as a feedback, the electronic control unit controls the current flowing through the electric motor to be equal to the target current value. The electronic control unit changes the feedback gain of the feedback control in accordance with a steering angle detected by a steering angle sensor, to thereby suppress abnormal noise generated at a steering mechanism, without deteriorating steering feel.03-12-2009
20130066524CONTROL DEVICE FOR ELECTRIC POWER STEERING APPARATUS - A control apparatus for an electric power steering apparatus, including a dead time characteristic section that calculates a dead time characteristic value; a steering status determining section that determines a steering status; a gain section that varies a gain of the dead time characteristic value in accordance with a determination of the steering status; a polarity determining section that switches polarity determining methods in accordance with the determination of the steering status and determines a polarity on the basis of a detected current of a motor, a current command value or a model current; a temperature sensor that detects a temperature of an inverter; a dead time temperature correction value calculating section that calculates a dead time temperature correction value corresponding to the temperature; and a calculation processing section that calculates and processes the dead time temperature correction value with respect to a dead time compensation value with polarity based on an output of the gain section and outputs a dead time compensation value.03-14-2013
20110022272POWER ASSIST STEERING SYSTEM - The present invention provides a power assist steering system for use with a motor vehicle utilizing a torque sensor and an electronically controlled hydraulic valve used to supply or meter hydraulic fluid to a hydraulic cylinder that provides power assist to the steering system. The torque sensor measures driver input and provides a signal to the controller that controls an electrically actuated hydraulic valve. Additionally, steering wheel rotational speed and position are also input to the controller wherein the controller generates a steering assist command that minimizes the magnitude of difference, or error, between the steering torque reference value determined from the steering wheel speed and position and the measured torque. By doing so, the invention controls steering wheel feel, as opposed to the conventional practice of controlling the steering assist boost curve.01-27-2011
20130166150SYSTEM AND METHOD FOR CONTROLLING INTER-VEHICLE DISTANCE USING SIDE AND REAR SENSOR - Disclosed is a system and method for controlling inter-vehicle distance. The system includes a front sensor, a side and rear sensor, an inter-vehicle distance controlling unit, and a steering controlling unit. The front sensor obtains information relating to a preceding vehicle. The side and rear sensor obtains information relating to vehicles in right and left lanes. The inter-vehicle distance controlling unit determines an avoidance direction for a lane change from data detected by the side and rear sensor when it is determined from data detected by the front sensor that a front end collision is unavoidable through just brake input. The steering controlling unit receives information relating to the avoidance direction determined by the inter-vehicle distance controlling unit and applies a steering force to a steering device to guide a driver to a lane in the determined avoidance direction.06-27-2013
20100063682Overturning prevention device for forklift vehicle - A subject of the present invention is to provide an overturning prevention apparatus for a forklift with various means. A cargo height H is calculated from a piston displacement detected by a displace sensor 03-11-2010
20100063683AN AID FOR DETECTING DROWSINESS OF A DRIVER OF A VEHICLE - A detection system (03-11-2010
20110282552SYSTEM AND METHOD FOR DETERMINING AN ABSOLUTE POSITION OF A MOTOR SHAFT IN AN ELECTRIC STEERING SYSTEM - A system and a method for determining an absolute position of a motor shaft in an electric power steering system during an ignition off state are provided. The system includes a microprocessor that energizes first and second position sensors to generate first and second signals, respectively, at a first time, and third and fourth signals, respectively, at a second time. The microprocessor determines a first relative position value based on the first and second signals, and a second relative position value based on the third and fourth signals. The microprocessor determines an amount of relative rotation of the shaft during the ignition off state based on the first and second relative position values, and determines a current absolute position value based on a previously stored absolute position value and the amount of relative rotation of the rotatable shaft.11-17-2011
20110282551POWER STEERING APPARATUS - A power steering apparatus includes a power cylinder configured to assist a steering force of a steering mechanism; a bidirectional pump; a flow speed detecting section configured to detect or estimate a flow speed of working fluid flowing in a hydraulic circuit constituted by the power cylinder, the bidirectional pump and the like; a fluid temperature detecting section configured to detect or estimate a temperature of working fluid; a torque sensor configured to detect a steering torque which is applied to the steering mechanism; an electric motor configured to drive the bidirectional pump; and a motor control circuit configured to control the electric motor. The motor control circuit includes a base-current command value calculating circuit configured to calculate a current command value on the basis of the steering torque, a corrected-current command-value calculating circuit configured to calculate a corrected-current command value from the current command value to cause the corrected-current command value to become larger as the flow speed is higher and as the working-fluid temperature is lower, and a motor drive circuit configured to drive the electric motor on the basis of the corrected-current command value.11-17-2011
20120290176ELECTRIC POWER STEERING APPARATUS, CONTROL METHOD THEREOF AND COMPUTER READABLE MEDIUM - The electric power steering apparatus is provided with: a steering torque detector that detects steering torque of a steering wheel; an electric motor that applies steering assist force to the steering wheel; a current detector that detects an actual current actually supplied to the electric motor; a target current setting unit that sets a target current to be supplied to the electric motor, on the basis of the steering torque detected by the steering torque detector; a feedback controller that performs feedback control so that the target current and the actual current coincide with each other; and a feedforward controller that performs feedforward control for increasing the actual current detected by the current detector if the target current increases, the feedforward controller including a frequency compensator that provides a smaller amount of increase in the actual current as a frequency of a variation in the target current is lower.11-15-2012
20090312913STEERING SYSTEM HAVING MULTIPLE STRATEGIES AND VARIABLE DEADZONE - A steering system for a machine having at least one steerable traction device is disclosed. The steering system may have a steering actuator operatively connected to the at least one steerable traction device, and a travel speed sensor configured to generate a signal indicative of a travel speed of the machine. The steering mechanism may also have an operator input device having a deadzone. The deadzone may vary in response to the signal. The steering system may also have a controller in communication with the steering actuator, the operator input device, and the travel speed sensor. The controller may be configured to affect operation of the steering actuator in response to operation of the operator input device only when the operation of the operator input device deviates from the deadzone.12-17-2009
20090312912Control Unit and Method for Driver Assistance - A control unit for a driving assistance of a vehicle includes a data interface for querying sensors for detecting surroundings data of the vehicle, a data interface for querying a steering angle of the vehicle, an arithmetic unit for ascertaining driving instructions based on the surroundings data of the vehicle transmitted by the sensors, a data interface for outputting the driving instructions, the driving instructions including at least one instruction to perform a steering of the vehicle at a standstill, and an interface for activating a braking system of the vehicle in such a way that the vehicle is braked during the steering performed at a standstill until a predefined steering angle is reached.12-17-2009
20110301815SYSTEM AND METHOD FOR DETERMINING A STEERING LOCK ANGLE OF A VEHICLE - In a method for determining a steering angle for a vehicle, a steering angle is determined using a single-track model of the vehicle, wherein the steering angle is corrected only if the difference between the derivative of a measured steering lock angle and the derivative of a calculated steering lock angle is below a threshold value. Otherwise the measurement is repeated.12-08-2011
20090024281STEER-BY-WIRE SYSTEM FOR AUTOMOBILES - Disclosed herein is a steer-by-wire system for automobiles. The steer-by-wire system includes a steering control unit and a signal input unit. The central control unit includes a reaction force generation unit, a damping force generation unit. The reaction force generation unit generates steering reaction force or restoring force, acting in the reverse direction to that of a steering torque. The damping force generation unit generates damping force, acting in the reverse direction to the steering reaction force or the restoring force (in the same direction as the steering torque). Furthermore, the central control unit generates a current control signal, which is applied to a steering feel generation motor, by combining the resulting values determined by the reaction force generation unit and the damping force generation unit a vehicle velocity signal in response to a steering angle signal, a steering torque signal and a steering angular velocity signal.01-22-2009
20110295465METHOD FOR A VEHICLE STEERING USING A VEHICLE STEERING DEVICE - A method is provided for vehicle steering using a steering actuation apparatus operable by the driver. The vehicle steering device has electromechanical control assemblies for this purpose for controlling a steerable wheel, located on the right and left on a vehicle body, of a wheel pair of at least one steerable vehicle axis. A central control unit compares target value specifications of the steering actuation apparatus to ESP specifications and actual values of the wheel positions of the steerable wheels and adapts electronic specifications of the steering stops for the steerable wheels to the operating situations of the vehicle.12-01-2011
20090112406Electric power steering controller - A correction value calculating section 04-30-2009
20110118941SYSTEM AND METHOD FOR STABILIZING A SINGLE-TRACK VEHICLE - A system for stabilizing a single-track vehicle including a front assembly and a rear assembly, said system comprising a robust controller including an inner loop which closes on a roll angular rate {dot over (χ)} of said rear assembly and reduces parametric uncertainty associated with said vehicle, and an outer loop which closes on a roll angle χ of said rear assembly, and wherein the robust controller outputs a steering torque signal for controlling a steering angle in said front assembly; a roll angle sensor for measuring the roll angle in the rear assembly; a roll rate gyro for measuring the roll angular rate in the rear assembly; and a motor for applying the steering angle to said front assembly responsive to the steering torque signal.05-19-2011
20090182468Understeer/Oversteer Correction for All Wheel Drive Vehicle - A method for correcting an understeer/oversteer condition of an all wheel drive vehicle (07-16-2009
20090287375METHOD FOR DETERMINING ABSOLUTE STEERING WHEEL ANGLE FROM A SINGLE-TURN STEERING WHEEL ANGLE SENSOR - A method and algorithm for determining a steering wheel angle of a vehicle steering mechanism upon power up of a vehicle using a single-turn steering wheel angle sensor by eliminating plausible steering wheel angles until one and only one steering wheel angle possibility remains.11-19-2009
20100030428METHOD AND DEVICE FOR DETERMINING AN ABSOLUTE VALUE OF A VARIABLE - A method and a device for acquiring a value of a defined reference point of a first variable which is measured by an incrementally measuring sensor of a motor vehicle are disclosed. The method includes the step of acquiring intermediate values of the defined reference point in at least two detection modules using at least one second measured variable, wherein each detection module is adapted to determine a value of the defined reference point of the first variable in a pre-defined driving situation. A quality level for each intermediate value is determined. The quality levels of the intermediate values are compared. The value of the defined reference point is determined from the acquired intermediate values in accordance with a result of the compared quality levels.02-04-2010
20090312911METHODS AND SYSTEM FOR AUTOMATIC USER-CONFIGURABLE STEERING PARAMETER CONTROL - A vehicle guidance system and method for automatically adjusting an amount of a user-configurable steering parameter applied to at least one steerable wheel of a vehicle. The vehicle guidance system may comprise a computing device for receiving a desired angle of the steerable wheel, measuring the actual angle of the steerable wheel, and comparing the actual angle with the desired angle. The computing device may then decrease the user-configurable steering parameter automatically if over-steering has occurred, meaning the actual angle of the wheel is determined to be greater than the desired angle of the wheel and angled in the same direction as the desired angle, or the computing device may increase the user-configurable steering parameter automatically if under-steering has occurred, meaning the actual angle of the wheel is determined to be less than the desired angle of the wheel or is angled in the opposite direction as the desired angle.12-17-2009
20120109466METHOD AND A SYSTEM FOR ASSISTING A DRIVER OF A VEHICLE DURING OPERATION - A method is provided for assisting a driver of a vehicle during operation by providing the driver with a desired steering feel. The method includes determining a desired steering device guiding force including a part representing a desired friction in a steering arrangement, and providing the driver with the desired steering feel based on the determined steering device guiding force.05-03-2012
20120109465METHOD AND A SYSTEM FOR CHANGING A VEHICLE'S TRAJECTORY - A method for changing a vehicle's trajectory, wherein the vehicle includes a steering arrangement including a manual steering device, at least one pair of ground engaging members and a mechanical interconnection therebetween, includes the steps of applying a braking force to at least one of the ground engaging members so that the vehicle's trajectory is changed, and simultaneously suppressing steering device disturbances resulting from the mechanical interconnection.05-03-2012
20120109464MOMENTUM CONTROL APPARATUS - The momentum control apparatus includes: an optimal feedback gain obtaining part for obtaining a plurality of optimal feedback gains used when each of the plurality of actuators is independently actuated to feedback control the momentum of the controlled object; and a feedback gain setting part for extracting a minimum feedback gain out of the plurality of optimal feedback gains obtained by the optimal feedback gain obtaining part as a feedback gain of a control system.05-03-2012
20120109463STEERING WHEEL MOTION AND SELF-CANCELLING TURN SIGNAL SENSOR - A steering wheel movement sensing apparatus for an agricultural vehicle comprising a magnetic ring configured to fit around the steering column such that it turns in unison with the steering wheel. The minimum number of magnetic poles on the ring is not defined, but a ring having at least 36 poles enables the movement sensor to detect steering wheel movement of 10 degrees. At least two hall-effect sensors fixed in a stationary position adjacent to the magnetic ring generate signals of fluctuating value as the magnetic poles pass enabling wheel movement and the extent of wheel movement to be derived. By specifically adjusting the position of the hall-effect sensors in relation to each other, the resultant output signals can also be used to determine the direction of movement of the steering wheel. Outputs from the sensing apparatus can be used to disengage an automated vehicle guidance system upon detection of steering wheel movement and to provide input to a self-cancelling turn signal system.05-03-2012
20120239255Lane Departure Prevention Device and Vehicle Provided with Same - A lane departure prevention device includes departure prevention control means that performs control to prevent deviation from a lane based on a result of detection means such as sensors and a camera, driver's intention determination means that determines driver's steering intention and actuator activation limiting means that limits activation of an actuator based on the driver's steering intention from the driver's intention determination means. The driver's intention determination means calculates a variation ΔTh in the steering torque detected and a variation ΔTs in the control command value to a steering actuator, and determines that, when |ΔTh|−|ΔTs| is a threshold or more, driver's operational intention is present and limits the activation of the departure prevention control. This can avoid the interruption of departure prevention control in response to activation of an actuator for lane departure avoidance that a driver does not intend because of erroneous detection that a driver intends as such.09-20-2012
20090093931STEERING CONTROL DEVICE AND ELECTRICALLY POWERED VEHICLE - Motor-generators are incorporated in front wheels and drive the front wheels, respectively. An ECU determines whether or not a steering apparatus including a steering actuator, a tie rod and a steering angle sensor has failed, based on an operation angle of a steering wheel from a steering wheel angle sensor and a steering angle of the front wheels from the steering angle sensor. When the ECU determines that the steering apparatus has failed, the ECU provides torque difference for a torque instruction for the motor-generators in accordance with the operation angle of the steering wheel.04-09-2009
20090222169METHOD FOR CONTROLLING THE STEERING FEEDBACK TORQUE - A method is provided for controlling the steering feedback torque of a power steering system within a closed loop control system. The power steering system provides an actual value (TACT) of the steering feedback torque, a nominal value (T09-03-2009
20120143443Front Wheel Drive Motorised Vehicle Control Using Acceleration Measurements - A front wheel drive motorised vehicle controller comprises: a control signal interface receiving control signals from a user control device indicating at least a demanded forward speed; an acceleration measurement interface, receiving acceleration measurements from at least one vehicle-mounted acceleration sensor, providing a first and second acceleration measurements with respect to first and second axes, the motorised vehicle being configured to be driven in a plane defined by the first and second axes; an acceleration magnitude calculation unit calculating an acceleration magnitude in dependence on the first and second acceleration measurements; a speed modification unit calculating a forward speed reduction factor in dependence on the acceleration magnitude and applying the forward speed reduction factor to the demanded forward speed to produce an applied forward speed; and a motor control unit controlling the speed of the left and right drive wheels in dependence on the applied forward speed.06-07-2012
20090005933LANE DEVIATION PREVENTION DEVICE - An apparatus to prevent a vehicle from deviating from a lane of travel includes an acquisition device configured to measure a yaw angle between the vehicle and the lane of travel, a lane deviation controller configured to output a yaw moment to maintain the vehicle in the lane of travel, a restriction device configured to restrict the yaw moment output when the measured yaw angle exceeds a first angle limit, and a correction device configured to adjust the first angle limit in response to a measured condition.01-01-2009
20090132126ELECTRIC POWER STEERING DEVICE - When an electrification failure occurs in any of the phase of a motor, a control device of an electric power steering device executes current control for generating, in each of two electrification phases other than a phase with the electrification failure, a phase current that changes in the form of a secant curve or a cosecant curve based on an asymptotic line, which is a predetermined rotational angle corresponding to the phase with the electrification failure, to thereby continuously output a motor control signal. The control device of the electric power steering device executes current restriction for restricting the phase current within a predetermined range. The control device of the electric power steering device further executes control for accelerating rotation of the motor during two phase drive, in order to prevent the occurrence of a stuck steering wheel during low-speed steering, which is caused as a result of the execution of the current restriction.05-21-2009
20090088927STEERING CONTROL METHOD, STEERING CONTROL DEVICE, AND WATERCRAFT - A watercraft includes an operating method in which a present steering wheel rotational angle is detected, and a steering wheel rotational angle variation is calculated by subtracting a steering wheel rotational angle in a preceding control period from the steering wheel rotational angle. Next, a steering angle ratio is set. A target steering angle variation is calculated by multiplying the steering wheel rotational angle variation by the steering angle ratio. Finally, a target steering angle in a present period is calculated by adding the target steering angle variation to a target steering angle in a preceding control period. A steering device is steered based on the target steering angle. The operating method operates to prevent a rider of a watercraft from feeling uncomfortable in the watercraft which has an electric steering mechanism when either a steering wheel or a steering device is turned in a state when a power supply is turned off or a case when steering wheel rotational angles of a plurality of operating stations differ from each other.04-02-2009
20080243340POWER ASSIST STEERING SYSTEM - The present invention provides a power assist steering system for use with a motor vehicle utilizing a torque sensor and an electronically controlled hydraulic valve used to supply or meter hydraulic fluid to a hydraulic cylinder that provides power assist to the steering system. The torque sensor measures driver input and provides a signal to the controller that controls an electrically actuated hydraulic valve. Additionally, steering wheel rotational speed and position are also input to the controller wherein the controller generates a steering assist command that minimizes the magnitude of difference, or error, between the steering torque reference value determined from the steering wheel speed and position and the measured torque. By doing so, the invention controls steering wheel feel, as opposed to the conventional practice of controlling the steering assist boost curve.10-02-2008
20100228444VEHICLE TRAVEL CONTROL DEVICE - An object of the present invention is to cover a drop in turning responsiveness of a vehicle to a driver's steering operation caused by a limit on the operating speed of a steerable wheel turning unit by a turn assist yaw moment independent of turn lateral forces of steerable wheels to thereby prevent the drop in turning responsiveness of the vehicle when the operating speed of the steerable wheel turning unit is limited. A vehicle travel control device comprises a steerable wheel turning unit capable of turning steerable wheels to steer independently of steering of a driver and a braking unit as a turn assist yaw moment generating means capable of generating a turn assist yaw moment independently of turn lateral forces of the steerable wheels. When a predetermined controlled variable limiting condition is established and the controlled variable of the steerable wheel turning unit is limited, the influence of limiting the controlled variable of the steerable wheel turning unit on the turn yaw moment of the vehicle can be reduced by changing braking forces of individual wheels and generating a yaw moment by differences in braking force between left and right wheels.09-09-2010
20080208412Steering control apparatus, steering control system, and steering control program - The present invention provides a steering control apparatus that controls steering of a vehicle of a steer-by-wire type, and includes steered-wheel motors that apply separate torques to right and left steered wheels respectively, a rod member that couples the right and left steered wheels so that the steered wheels can be steered, and a steering controller that controls driving of the steered-wheel motors. In each steered wheel, a center of the contact face thereof and a kingpin point thereof are offset in a lateral direction of the vehicle, and the steering controller controls driving of the steered-wheel motors so as to generate a torque difference between the right and left steered wheels, and provides a steering effort in accordance with this torque difference for each of the right and left steered wheels via the rod member, thereby to steer the vehicle.08-28-2008
20080208411Method for Controlling an Electric Steering Assistance System - In a method for controlling an electric steering assistance system having an electric motor to provide an auxiliary torque for a steering arrangement, a steering wheel torque, which is applied by the driver, is measured. The measured steering wheel torque signal undergoes high-pass filtering to determine an inertia compensation torque requirement, such that a signal is obtained which is representative of the dynamics of the steering wheel torque signal. The method according to the invention makes possible a modification of the steering wheel torque dynamics which is dependent on the steering angle velocity. An electric steering assistance system having a control arrangement to carry out the method comprises an electric motor to provide an auxiliary torque for a steering arrangement. The control arrangement has a high-pass filter in which the steering wheel torque signal undergoes high-pass filtering.08-28-2008
20090276123Steering System of a Motor Vehicle - A steering system of a motor vehicle has a steering wheel which engages a steering rack via a steering pinion of a steering column. A steering torque is exerted by a driver on the steering rack via the steering wheel. A steering torque assistance unit is provided and has an electric drive and a gear stage. A steering assistance torque is able to be exerted on the steering rack via the electric drive of the steering torque assistance unit. The electric drive engages the steering rack via the gear stage. Accordingly, at least one sensor determines by measurement a bearing force acting on a bearing of the steering torque assistance unit, the steering torque assistance unit generating the steering assistance torque in dependence on the steering torque exerted by the driver and in dependence on the bearing force determined by measurement.11-05-2009
20110172883STEERING CONTROL SYSTEM FOR VEHICLE - A steering control section has a first steering angle correction amount calculating section, a second steering angle correction amount calculating section, and a motor rotational angle calculating section. The first correction amount calculating section calculates a first correction amount based on a vehicle speed and an actual steering wheel angle. The second correction amount calculating section calculates a second correction amount through multiplying a control gain corresponding to the vehicle speed with a value calculated by low-pass filtering a differential value of steering wheel angle. The motor rotational angle calculating section calculates a motor rotational angle corresponding to the value adding the first and second steering angle correction amount, and outputs it to a motor driving section so as to drive an electric motor for correcting the steering angle. Thereby, an unstable vehicle behavior due to a resonance of a yaw motion caused in the steering operation can be suppressed.07-14-2011
20130218417ELECTRIC POWER STEERING APPARATUS - An electric motor has a stator and a rotor that are used in common between two systems. An ECU controls the motor torque by supplying drive electric power to the motor coils independently of each other. When the ECU determines that the vehicle is traveling on a uneven road, the ECU causes the electric motor to perform a braking operation by short-circuiting at least two phases of the electric motor of one of the two systems that is other than the system that is executing a torque control of controlling the assist torque according to the steering torque and the vehicle speed.08-22-2013
20080249685Steering Control Apparatus and Method - A vehicle steering controller includes a turning unit which is mechanically separated from a steering unit, which receives the steering input, and turns the road wheels corresponding to the steering input. The controller also includes a reaction force motor that applies a steering reaction force corresponding to the turning state of the turning unit to the steering unit, a hands-off detection sensor that detects whether the steering unit is in the hands-off state, and a steering reaction force correction component that reduces the steering reaction force from that in the hands-on state when the hands-off state is detected.10-09-2008
20120296525STEERING CONTROLLER - In a steering control device, a road surface reaction force torque calculation module (11-22-2012
20110144865DEVICE AND METHOD FOR CONTROLLING AN AUTOMATIC STEERING SYSTEM OF A VEHICLE, AND DEVICE AND METHOD FOR CHECKING THE ABILITY TO IMPLEMENT A PREDEFINED SETPOINT TRAVEL DIRECTION VARIABLE FOR A VEHICLE - A device for controlling an automatic steering system of a vehicle includes a signal input (which receives a setpoint travel direction variable, a memory device on which a correction factor is stored, a control unit which ascertains a corrected setpoint travel direction variable on the basis of the correction factor and the predefined setpoint travel direction variable, and an evaluation device which compares an actual travel direction variable ascertained by a sensor of the vehicle to the predefined setpoint travel direction variable, and if the actual travel direction variable deviates from the predefined setpoint travel direction variable by at least a minimum difference, redefines the correction factor according to the comparison.06-16-2011
20090265062STEERING SUPPORT DEVICE - An object of the present invention is to provide a steering assist device which can perform steering assist control having excellent capability to follow up a traveling path by increasing the steering amount in the steering control at a curve entrance. A steering assist device of the present invention is a steering assist device 10-22-2009
20080243341VEHICLE STEERING APPARATUS - A steered shaft of a steered mechanism is rigidly fixed to a vehicle body. Steering-stiffness is reduced by a lowpass filter for filtering a steered angle detected by a steered angle sensor. A deviation between a target steered angle and the filtered steered angle detected by the steered angle sensor is input to a PID control unit. A gain setting unit sets each of gains for PID control at a low value to thereby reduce steering-stiffness. The PID control unit outputs a target current. A drive circuit performs, e.g., PID control of the steering actuator.10-02-2008
20080208410Secure Control Mode Transition Methods for an Active Front Steer System - A system and method for secure and restricted transitions between steering control modes for a vehicle with active front steering is disclosed. Possible operating control modes include precision, electric phase locking, and proportional integral derivative (PID) modes. Each operating control mode is monitored and the operational status of the modes are checked before transitioning. For security, the system can prevent transitions from PID to precision control mode and restrict electric phase locking mode to transition only to a mechanical locking mode.08-28-2008
20090076684Motorcycle - A motorcycle is provided with a fork-like wheel carrier, on the lower end of which a front wheel is supported, a handlebar by which the wheel carrier can be steered in a steering direction to the left or the right during travel, and a transmission unit by which the handlebar is coupled to the wheel carrier. The transmission unit is provided for transmitting steering forces, introduced into the handlebar, to the wheel carrier and bringing same into a corresponding steering position. The wheel carrier is mounted so as to be pivotable with respect to the handlebar, such that for a specified steering position, the wheel carrier can be moved, at least over a certain range, relative to the handlebar in the steering direction.03-19-2009
20090118907VEHICULAR BEHAVIOR CONTROLLER - A vehicular behavior controller is disclosed. The controller comprises a turning force application mechanism and a stabilization controller. The turning force application mechanism applies a turning force to a vehicle. The stabilization controller is operable to regulate the turning force application mechanism in such a manner that a turning characteristic and a straight travel property of the vehicle are stabilized while in an unstable velocity area when the velocity of the vehicle exceeds a stable limit velocity.05-07-2009
20100036564ASSISTANCE SYSTEM FOR DRIVING IN SLOPES FOR AUTOMOBILES - The system of the invention includes sensors (02-11-2010
20090138158METHOD FOR OPERATING A SUPERPOSED STEERING SYSTEM FOR A MOTOR VEHICLE - In a method for controlling a motor vehicle via driving dynamics, using an auxiliary steering system, including a power steering assistance unit, a superposed transmission, and a final control element to correct a driver-steering angle by applying an auxiliary steering angle, an overall steering angle is formed to modify the wheel-steering angle of steered wheels with the aid of the superposed transmission, and a control and regulation unit assigned to the final control element determines a setpoint for the auxiliary steering angle. When an understeering state is detected, the setpoint of the auxiliary steering angle is modified such that the lateral wheel force is kept within a range of a maximally achievable maximum value for the lateral wheel force, which is dependent upon environmental influences, for the duration of the understeering state.05-28-2009
20100004824ELECTRIC POWER-STEERING CONTROL APPARATUS - A steering-torque detecting unit detects a steering torque applied by a driver as a steering torque signal. A phase-lag compensation unit performs an operation having a frequency response characteristic of multiplying a phase-lag compensation by a constant for the steering torque signal based on a signal obtained by applying an amplification by a first gain and a low pass filter on the steering torque signal and a signal obtained by applying an amplification by a second gain on the steering torque signal. A current control unit controls a current applied to a motor to follow a current command that is obtained based on an output of the phase-lag compensation unit.01-07-2010
20090187311System and Method for Electronically Power Assisted Steering - A system and method for controlling a vehicle steering system, comprising receiving at least one signal corresponding to one or more of a lateral acceleration, a longitudinal acceleration, a vertical acceleration, a suspension travel, and a vehicle speed, calculating or determining an optimum steering rack travel from the at least one signal, and limiting travel of a steering rack of the vehicle based on the optimum steering rack travel.07-23-2009
20090187312ELECTRIC POWER STEERING DEVICE - The rotational angle correction controller includes a second correction amount-computing part that computes a second correction amount ε07-23-2009
20090326763SYSTEM AND METHOD FOR PROVIDING TOWED IMPLEMENT COMPENSATION - A method for providing real-time, towed implement compensation comprises dynamically calculating an implement offset relative to a targeted track for an implement located at a first implement location. Based on the calculated implement offset, a vehicle offset is dynamically calculated relative to the targeted track for a vehicle located at a first vehicle location. The method further includes dynamically calculating a modified vehicle offset relative to the targeted track based on the calculated vehicle offset and based on a dynamically-calculated vehicle lateral error. The method further includes dynamically providing a steering control signal based on the calculated modified vehicle offset.12-31-2009
20080306655CONTROL APPARATUS FOR ELECTRIC POWER STEERING SYSTEM - There is provided a control apparatus that controls a motor of an electric power steering system to assist a steering effort of an operator. The control apparatus includes a sensor, a parameter computer, a difference computer, a target torque computer, and a motor driver. The parameter computer computes a current value of one of physical parameters of one of constituents of the electric power steering system based on a steering parameter determined by the sensor referring to an equation of motion. The difference computer computes a difference between the current value of the one of the physical parameters computed by the parameter computer and a predetermined value of the one of the physical parameters. The target torque computer computes a target torque of the motor which compensates for the difference between the current value and the predetermined value of the one of the physical parameters.12-11-2008
20110224876FRICTION FORCE COMPENSATION IN AN ELECTRIC STEERING SYSTEM - A method of operating an electric power steering system, wherein the steering system comprises a steering wheel coupled to a steering column, a pinion engaging a toothed rack to operate steerable wheels of a vehicle, at least one sensor for measuring a torque applied to the steering column or a force applied to the rack, and an servo motor supplying steering assist to support a steering effort of a driver, the torque sensor and the servo motor being connected to a control unit, the method comprising the following steps:09-15-2011
20110224875Biometric Application of a Polymer-based Pressure Sensor - The invention is a control system for adjusting at least one vehicle system in a plurality of vehicle systems comprising at least one polymer-based biometric sensor positioned proximate a driver for monitoring at least one vital sign of a driver of the vehicle and configured to produce data in response to changes in the at least one vital sign. The system also comprises at least one camera system positioned to view the driver. A first processing system is configured to receive sensor data and input collected by the camera system to determine a biometric state of the driver. The biometric state of the vehicle driver is then used to determine an adjustment setting for the at least one vehicle system thereby controlling the vehicle system in response to the adjustment setting in accordance with the determined biometric state of the vehicle driver.09-15-2011
20090287376Vehicle Control Device - A vehicle control device calculates an operation amount and a motion state amount for varying an operation amount necessary for a real vehicle's operation based on a dynamic vehicle model modeling the motion state of a vehicle running in accordance with running targets such as a target path and a speed pattern and determines whether the calculated operation amount and the motion state amount satisfy prescribed running requirements. The operation amount and the motion state amount determined to satisfy the running requirements are a feed-forward (FF) operation amount and a target state amount in a state feedback (FB) control, respectively.11-19-2009
20090082924Active Resetting Function For A Steering Wheel - A method for resetting a steering wheel of a motor vehicle having electric power assisted steering, with a resetting torque being determined in order to move the steering wheel from a diffracted steering position to a neutral position. The resetting torque differs for low and high friction values wherein a signal produced in response to a determined yaw rate is introduced into the determination of the resetting torque. The contribution of the yaw-rate based resetting torque to the total resetting torque increases as the vehicle speed increases.03-26-2009
20110231066ELECTRIC POWER STEERING APPARATUS AND ELECTRIC MOTOR DRIVING CONTROLLER USED FOR THE APPARATUS - A q-axis target current setting unit generates a q-axis current command value based on a steering input signal from a steering torque sensor and a vehicle speed signal from a vehicle speed sensor. An electric motor generates a predetermined torque based on the q-axis current command value and a q-axis current (a torque current) to which a fed back q-axis real current is added. On the other hand, a d-axis correction current setting unit sets a field weakening current (a d-axis current) in response to a voltage saturation (duty ratio=driving voltage of electric motor/power supply voltage) output from a voltage saturation calculating unit. For this reason, when the voltage saturation becomes high, distortion (harmonics component) in current can be decreased by decreasing the voltage saturation while keeping the torque constant using a predetermined torque current, and a torque ripple can be suppressed.09-22-2011
20080262678ELECTRIC POWER STEERING APPARATUS - A microcomputer is provided with an extracting section capable of extracting a specific frequency component from an input signal. The extracting section extracts, from a pinion angle corresponding to a signal indicating a state of the steering system, a frequency component corresponding to a vibration of a steering system caused by stress applied to steerable wheels. The extracting section outputs an effective value of the extracted frequency component as a power spectrum to a second computing section. In the case that the power spectrum output from the extracting section is equal to or more than a predetermined threshold value, the microcomputer enhances a torque inertia compensation control so as to suppress vibration of the steering system caused by the stress. In other words, the microcomputer increases a torque inertia compensation amount corresponding to a compensation component based on a steering torque differential value.10-23-2008
20080319613Turning Behavior Control Apparatus and Turning Behavior Control Process for a Motor Vehicle - A turning behavior control apparatus and turning behavior control process for a motor vehicle is disclosed. The apparatus is configured to set a target vehicle turning behavior (such as the target side slip angle and the target yaw rate) in accordance with a driver's steering operation, to independently set a target vehicle yaw direction, to modify the target vehicle turning behavior in accordance with the target vehicle yaw direction, to calculate target front and rear wheel steer angles in accordance with the modified target turning behavior and to control steer mechanisms in accordance therewith.12-25-2008
20090210112PROCESS AND DEVICE FOR STABILISING A VEHICLE - A method for stabilizing a vehicle including a trailer drawn by the vehicle including the steps of: determining the yaw rate of the vehicle; determining the reference yaw rate in a vehicle model; producing a difference value from the yaw rate and the reference yaw rate; weighting the difference value with a signal describing the steering dynamics; producing a signal to determine the side of intervention and/or the wheel of intervention and/or the steering angle direction of the vehicle from the tendency to change of the weighted difference value, and applying a counteracting moment depending on the amplitude and the tendency to change of the weighted difference value.08-20-2009
20090248249METHOD FOR DETERMINING CONTROLLED VARIABLE OF COORDINATE CONTROL ON SPLIT ROAD SURFACE USING DECELERATION OF VEHICLE - Disclosed herein is a method of determining a controlled variable of coordinate control on a split road surface using deceleration of a vehicle. The method includes calculating deceleration of the vehicle by differentiating a reference velocity (Vref) calculated by an electronic stability control system, calculating an override angle of an active front-wheel steering system by multiplying the deceleration of the vehicle by a control gain, determining a control direction of the vehicle, and obtaining a controlled variable for a steering angle by multiplying the calculated override angle of the active front-wheel steering system by the determined control direction of the vehicle. The method enables the vehicle to maintain a straight behavior without driver's steering intervention when the driver brakes on the split road surface10-01-2009
20090248252Method for Monitoring the Operating Conditions of Motor Vehicles - The invention relates to a method and a device for monitoring the operating conditions of motor vehicles, with a drive system with at least one differential that distributes drive torque to the driven wheels. To avoid unacceptable wear in the differential of the drive system, it is proposed that at least the output speeds of the differential, and, via a steering angle sensor, an at least approximate driving of the motor vehicle in a straight line are detected and are compared over a time interval, and that in the case where the differential speed of the output shafts is above a defined speed threshold and prevails over the time interval and the vehicle is driven in a straight line, a warning signal is generated.10-01-2009
20090222168REMOTE CONTROL SYSTEM - A remote control system comprising a user operated movable input device (09-03-2009
20120197495METHOD AND SYSTEM FOR MANAGING THE TURNING OF A VEHICLE - A method and system for managing the turning of a vehicle comprises establishing a boundary of a work area. A location-determining receiver determines an observed position and velocity of the vehicle in the work area. An estimator estimates a first duration from an observed time when the vehicle will intercept the boundary based on determined position and velocity of the vehicle. An alert generator generates an alert during a second duration from the observed time. The second duration is less than or approximately equal to the first duration. An operator interface allows an operator to enter a command to control a path of the vehicle prior to or at the boundary.08-02-2012
20120197494Method and device for aligning a determed steer angle with a measured steer angle - A method for aligning a steer angle, which is determined continuously in a processor for controlling a steering system, with a second steer angle which is measured continuously by a sensor of the steering system, the steer angles varying over time in such a way as to deviate negatively and positively from a neutral value. A first time profile of the varying first steer angle is monitored continuously, and a second time profile of the varying second steer angle is monitored continuously. If no alignment of the first steer angle with the second steer angle has yet been carried out, the first steer angle is set to the present value of the second steer angle. If at least one alignment of the first steer angle with the second steer angle has already been carried out previously, and if a change of sign occurs in the first profile, the first steer angle is varied by a corrective value which is determined as a function of a hysteresis occurring in the second profile. The disclosure is particularly suitable for use in a control unit of an electric power steering system.08-02-2012
20090254252ELECTRIC POWER STEERING CONTROL APPARATUS - Provided is an electric power steering control apparatus for an electric power steering system equipped with a torque sensor for detecting a steering torque of the steering system and a motor for generating a torque for assisting the steering torque, including a motor target torque calculation unit for calculating a torque of the motor in response to a steering torque signal from the torque sensor and a motor-applied voltage calculation unit for calculating a voltage applied to the motor in response to a motor target torque signal from the motor target torque calculation unit, in which the motor target torque calculation unit generates the motor target torque signal indicating a motor target torque whose ratio to a steering torque indicated by the steering torque signal is set such that an influence of a torque fluctuation of the motor on a driver becomes equal to or smaller than a predetermined value.10-08-2009
20090254253ADAPTIVE STEERING CONTROL FOR A MOTOR VEHICLE - An adaptive steering control system is provided for a motor vehicle. The system includes, but is not limited to a sensor for detecting a current value of an operation quantity of a steering wheel, an actor for turning steered wheels and a controller for selecting, according to the speed of the vehicle, a map (g10-08-2009
20090259367METHOD FOR CONTROLLING MOTOR-DRIVEN POWER STEERING SYSTEM - A method for controlling a motor-driven power steering system, in which a target torque value of a motor is calculated through conducting torque boost control, returning force control and damping control by receiving a steering torque, a steering angle, a steering angular velocity and a vehicle speed, current motor current is sensed, proportional integral control is conducted for the current motor current, a pulse width modulation signal for compensating for an over/under voltage in comparison with the target torque value is generated, and a final motor torque is controlled. The proportional integral control is added with motor speed-responsive control by a proportional constant (α) that varies depending upon the motor speed, which is sensed in real time.10-15-2009
20100191422Method and device for recognizing driver fatigue using a torque sensor system - A method is provided for recognizing the fatigue of a driver of a vehicle. In the method a torque variable representing the torque applied to the steering wheel by the driver is detected, and the presence of fatigue of the driver is detected on the basis of the torque variable.07-29-2010
20100191423VEHICLE ROLLOVER PREVENTION CONTROL APPARATUS AND VEHICLE ROLLOVER PREVENTION CONTROL METHOD - In a vehicle rollover prevention control apparatus employing a brake system serving as an actuator configured to control a dynamic behavior of a vehicle, a steering-input decision section is provided to make a rollover prediction, based on a driver-applied steering input, whether a predetermined level of roll motion for the vehicle occurs, and also to detect a driver-applied steering-back action. Also provided is an active rollover prevention control intervention decision section configured to make a rollover decision about rollover of the vehicle when the driver-applied steering-back action has been detected. An active rollover prevention control section is configured to execute rollover prevention control by controlling the actuator, when it is predicted for the predetermined level of roll motion to occur by the steering-input decision section and the rollover decision that rollover will occur has been made by the active rollover prevention control section.07-29-2010
20120197496VEHICLE CONTROL APPARATUS - A vehicle control apparatus that controls a vehicle provided with a steering force applying device capable of applying steering force to induce a change in a steering angle of a steered wheel to the steered wheel, includes a difference detecting device that detects a positional difference that determines a relative positional relationship between a target running path to be maintained and the vehicle; a determining device that determines a control amount of the steering force applying device based on the detected positional difference; a controller that maintains a running path of the vehicle on the target running path by controlling the steering force applying device according to the determined control amount; a steering input detecting device that detects a steering input to a steering input device by a driver; and a correcting device that corrects a determining reference of the control amount of the steering force applying device such that, when a steering input is detected while the running path is maintained on the target running path, this steering input is reflected.08-02-2012
20100217487ELECTRIC POWER STEERING APPARATUS, CONTROL METHOD THEREOF AND COMPUTER READABLE MEDIUM - The electric power steering apparatus is provided with: a steering torque detector that detects steering torque of a steering wheel; an electric motor that applies steering assist force to the steering wheel; a current detector that detects an actual current actually supplied to the electric motor; a target current setting unit that sets a target current to be supplied to the electric motor, on the basis of the steering torque detected by the steering torque detector; a feedback controller that performs feedback control so that the target current and the actual current coincide with each other; and a feedforward controller that performs feedforward control for increasing the actual current detected by the current detector if the target current increases, the feedforward controller including a frequency compensator that provides a smaller amount of increase in the actual current as a frequency of a variation in the target current is lower.08-26-2010
20100145579METHOD AND SYSTEM FOR ONBOARD ZERO OFFSET COMPENSATION FOR ELECTRIC POWER ASSIST STEERING TORQUE SENSOR - A method and system for onboard zero offset compensation for ATV electric power assist steering (EPAS) torque sensor. An electric assist torque can be applied to an EPAS motor in a clockwise and a counterclockwise direction until a movement is generated in a steering column. A threshold value of torque signal generated by the torque sensor in both directions can be stored when the applied torque exceeds a reaction torque to cause acceleration of a shaft. The reaction torque can be determined under conditions such as, for example, when no one is holding the handle bars and the wheels are free from obstruction. The magnitude of the torque signals are approximately equivalent and an absolute magnitude of the torque signals falls below a general torque limit that can be set under ideal conditions with the ATV. Thereafter, an auto zeroing operation can be performed a number of times throughout the life of the ATV and the error due to offset drift of the sensor can be reduced.06-10-2010
20100241315METHOD FOR OPERATING A STEERING UNIT FOR A STEER-BY-WIRE SHIP'S CONTROL SYSTEM - A method of operating a steering unit for a steer-by-wire ship control system, comprising a steering wheel, a controller that is connected to the electronic controller of the steer-by-wire ship control system (ECU), a sensor for detecting the angular position of the steering wheel, and a device for generating mechanical resistance at the steering wheel. The mechanical resistance generated at the steering wheel, by the device for generating mechanical resistance at the steering wheel upon actuation of the steering wheel by an operator, depends on the speed of the engine or ship. The resistance is raised as the speed increases until a predetermined threshold is reached. If an auto-pilot device is activated, then the mechanical resistance has a constant value at every speed.09-23-2010
20100235053PARKING ASSIST DEVICE - The present invention provides a parking assist device (09-16-2010
20100228443Electric Power Assisted Steering Assembly - An electric power assisted steering assembly comprises a steering mechanism which operatively connects a steering wheel to the road wheels of a vehicle, a torque sensing means which is adapted to produce an output signal indicative of the torque applied to a portion of the steering mechanism by the driver, a signal processing means which is adapted to control the motor so as to cause the motor to apply a torque to the steering mechanism to assist the driver, and a compensation torque generating means which is adapted to combine a torque value representative of the motor applied torque with the output of the torque sensor to produce a compensation torque signal that is to be applied by the motor to the steering mechanism that at least partially compensates for any pull on the steering due to suspension misalignment.09-09-2010
20100211267PARKING ASSISTANCE APPARATUS, VEHICLE-SIDE APPARATUS OF PARKING ASSISTANCE APPARATUS, PARKING ASSIST METHOD, AND PARKING ASSIST PROGRAM - A parking assistance apparatus makes it easy for a driver to grasp a relative positional relation between a vehicle and a target parking position and makes it possible to park the vehicle at the target parking position in a parking space with accuracy.08-19-2010
20100152972PARALLEL PARK ASSIST - A parallel parking assist system and a method for evaluating an area for use as a parking space for a host vehicle, the parallel park assist system comprises a ultra wideband radar sensor disposed in the host vehicle, wherein the radar sensor obtains a measurement data relating to a potential parking space and transmits a data signal representing the measurement data, a processor adapted to receive the transmitted data signal from the sensor, analyze the data signal, and transmit an alert signal in response to the analysis of the data signal, and a user interface adapted to receive the alert signal and provide an alert to the driver of the host vehicle in response to the alert signal, wherein the alert signal represents the suitability of the potential parking space.06-17-2010
20100211268DRIVER STATE ESTIMATION DEVICE - A driver state estimation device 08-19-2010
20100211269MOTION CONTROL DEVICE OF VEHICLE - A motion control device of a vehicle comprises: a steering angle controller which controls a steering angle of a steering wheel so that an actual turning control variable becomes a target turning control variable; and a braking force controller which controls a vehicle braking force so that the actual turning control variable becomes the target turning control variable. The braking force controller selectively uses, as a steering angle signal for control, a first steering angle signal which reflects a steering angle compensation quantity compensated by the steering angle controller at the time of the oversteering of the vehicle is reflected, and a second steering angle signal which does not reflect the steering angle compensation quantity.08-19-2010
20100204889ELECTRIC POWER STEERING SYSTEM DESIGNED TO GENERATE TORQUE FOR ASSISTING DRIVER'S TURNING EFFORT - In an electric power steering system installed in a vehicle and designed to generate, by a motor, assist torque for assisting the driver's turning effort of the steering wheel, a self-aligning torque determiner determines a value of self aligning torque applied to the vehicle. A commanded-value generator determines a value of an assist ratio based on a predetermined relationship between a variable of the self aligning torque and a variable of the assist ratio. The assist ratio represents a ratio of share of torque by the motor for compensating the self aligning torque. The commanded-value generator generates, based on the self aligning torque and the value of the assist ratio, a commanded value for the assist torque. An assist torque determiner determines the assist torque based on the commanded value for the assist torque generated by the commanded-value generator.08-12-2010
20130218416VEHICLE RUNNING CONTROL METHOD FOR AVOIDING THAT A VEHICLE COLLIDES WITH AN OBSTACLE - A vehicle running control method includes detecting an obstacle in front of a vehicle; detecting a dynamic state of the vehicle; detecting an operation of the vehicle, the step of detecting including detecting at least a first steering operation amount of a driver; generating a collision avoidance route; calculating a second steering operation amount, the second steering operation amount being a steering operation amount necessary to be added to the first steering operation amount for following the generated collision avoidance route; and performing running control of the vehicle based on the generated collision avoidance route. When the vehicle is in a state of avoiding a collision, if the first steering operation amount is insufficient for following the generated collision avoidance route, the running control of the vehicle is implemented such that the second steering operation amount is used to compensate for the insufficiency of the first steering operation amount.08-22-2013
20090248251HEADLIGHT CONTROL DEVICE - A light control device is provided in which an operation is executed to acquire a detected result representing an own vehicle approaching an intersection (S10-01-2009
20120245799STEERING SYSTEM - A steering system (09-27-2012
20090319130METHOD AND SYSTEM FOR ADAPTIVELY COMPENSATING CLOSED-LOOP FRONT-WHEEL STEERING CONTROL - An active front-wheel vehicle steering control system that employs closed-loop control includes an adaptive compensation sub-system that compensates for changes in vehicle dynamic parameters. The control system includes a dynamic parameter estimation sub-system that provides an estimated front cornering compliance and rear cornering compliance based on a steering wheel angle signal, a vehicle lateral acceleration signal, a vehicle yaw rate signal and a vehicle speed signal. The closed-loop control includes active gain for each of vehicle yaw rate, yaw acceleration, side-slip and side-slip rate, all based on the vehicle speed and vehicle dynamic parameter changes for use in generating a steering angle control signal to the front wheels of the vehicle.12-24-2009
20080312793Method of Controlling an Inhomogeneous Roadway - To determine an inhomogeneous roadway in μ-split situation during active ABS control and active yaw torque control (YTC) of a front wheel (HM-wheel) on the high-coefficient-of-friction side, it is arranged that at least the following conditions must be satisfied before the μ-split situation is flagged: 12-18-2008
20080228354ELECTRIC POWER STEERING CONTROL APPARATUS - An electric power steering control apparatus can reduce steering torque even in a steering holding state or a slight steering state without providing an unpleasant feeling to a driver. The apparatus includes a torque sensor for detecting steering torque generated by the driver for a vehicle, a motor for generating assist torque to assist the steering torque, a rotational speed detector for detecting the rotational speed of the motor, a torque controller for calculating an assist torque current corresponding to the assist torque based on the steering torque, and a damping control section for calculating a damping current to be added to the assist torque current to suppress vibrations generated in a steering system of the vehicle. The damping controller reduces a damping control gain to calculate the damping current when the rotational speed of the motor is equal to or less than a predetermined speed.09-18-2008
20130131926ROAD WHEEL DISTURBANCE REJECTION - A control method for an electric power steering system is provided. The control method includes evaluating wheel disturbance based on a wheel velocity. A wheel disturbance cancel amount is determined based on the wheel velocity. An assist command is generated to the power steering system based on the wheel disturbance cancel amount.05-23-2013
20090069982Method for Monitoring the Vehicle Handling of a Two Track Vehicle - A method monitors the vehicle handling of a vehicle with respect to vehicle stability by comparing a measured variable, which reflects the yaw rate or the lateral acceleration, with a comparison value, which is derived from the steering angle, specified by the driver. The gradients of the regression lines, which are normalized in relation to each other, of the measured variable, on the one hand, and the comparison value, which represents the steering angle, on the other hand, are compared continuously over a number of analysis time windows. Upon finding a significant deviation between these gradients, an unstable driving condition is concluded. The difference between the gradients of the regression lines, which may be determined by a first order least squares method and normalized to the same units by a suitably applied amplification factor, are determined and compared with a suitably determined limit value, above which an instability is inferred. Alternatively, the measured variable and the comparison value, which represents the steering angle, can be analyzed for a linear or nonlinear dependence within an analysis time window by a coherence analysis; and on detection of a noteworthy nonlinearity, an unstable driving condition can be concluded.03-12-2009
20090037054VEHICLE STEERING CONTROL APPARATUS - A vehicle steering control apparatus includes an actuator to vary a steering gear ratio of a vehicle wheel steer angle of a steerable wheel to a steering wheel angle. A controller controls the actuator to produce an actuator torque in a steering direction at a start of a driver's steering operation.02-05-2009
20130138298SYSTEM AND METHOD FOR PROVIDING STEERING TORQUE ASSISTANCE TO AN ELECTRICALLY-POWERED STEERING APPARATUS OF A VEHICLE - A system for providing steering torque assistance to an electrically-powered steering apparatus comprises a torque assistance motor coupled to the steering apparatus. A steering controller is configured to cause the torque assistance motor to apply a commanded level of steering torque assistance to the steering apparatus. The steering controller is configured to determine the commanded level of steering torque assistance based on a product of a scheduled level of steering torque assistance and a torque assistance scale factor, wherein the scheduled level of steering torque assistance is determined from a scheduled torque assistance characteristic having a nominal assist. The steering controller is configured to determine a scaled assist based on feedback from one or more safety sensors; and the torque assistance scale factor is determined as a ratio of the scaled assist and the nominal assist.05-30-2013
20130138299POWER STEERING APPARATUS CAPABLE OF SENSING MOISTURE - A power steering apparatus includes: a torque sensor for detecting a steering torque applied to a steering wheel and outputting a torque signal corresponding to the steering torque; a speed sensor for detecting a speed of a vehicle and outputting a speed signal corresponding to the speed of the vehicle; a humidity sensor for outputting a humidity signal corresponding to a humidity of an interior of the power steering apparatus; and an electronic control unit for receiving the humidity signal from the humidity sensor, and for, when a measured humidity is an reference value or higher, generating a motor current signal for supplying an assistant steering force smaller than an assistant force set in response to the torque signal and the speed signal.05-30-2013
20130144491TECHNIQUE FOR CONTROLLING LANE MAINTENANCE BASED ON DRIVER'S CONCENTRATION LEVEL - Provided is a technique which controls lane maintenance based on a driver's concentration level. More specifically, for a memory stores reference steering angles for each driver's concentration level. Each of the reference steering angles indicates time points that a lane keeping assist system (LKAS) intervenes in driving. A calculator calculates a driver's concentration level based on a variation of a steering angle and a driving state of a vehicle. A controller detects a reference steering angle corresponding to a calculated concentration level from the calculator based on the reference steering angles for each driver's concentration level stored in the memory, and controls an LKAS driver based on a detected reference steering angle. The LKAS driver drives the LKAS based on the detected reference steering angle from the controller.06-06-2013
20100332080METHOD AND APPARATUS FOR PARKING ASSISTANCE - A method of providing assistance to a driver for parking a vehicle includes detection of a space and a location of the vehicle for vehicle parking. The method determines a feasibility for parking the vehicle into the space based on the space; calculates a parking path based on the space and the location; generates a constant target position of a steering wheel based on the parking path; generates a first human machine interface (HMI) signal that instructs the driver to turn the steering wheel based on the target position, wherein the first HMI signal is generated when the vehicle is not moving; monitors a steering wheel angle of the vehicle including comparing the steering wheel angle with the constant target position, and detecting that the steering wheel angle reaches a proximity of the target position. The method also includes generating a second HMI signal that instructs the driver to hold the steering wheel, wherein the second HMI signal is generated when the steering wheel angle has reached the proximity of the target position; generating a vehicle motion command after the steering wheel angle is held steadily according to the second HMI signal; and generating a third HMI signal based on the vehicle motion command.12-30-2010
20110035113VEHICLE TOE ANGLE CONTROLLER - It is possible to drive a motor (02-10-2011
20110035110POWER STEERING DEVICE FOR AUTOMOBILE - The steering system of the invention includes a processing means (02-10-2011
20110035114MOTOR CONTROL DEVICE AND ELECTRIC STEERING SYSTEM - A motor control device includes: a rotation angle detection portion that detects a rotation angle of a motor and outputs a rotation angle signal; an abnormal condition detection portion that detects the presence or absence of an abnormal condition of the rotation angle detection portion; a rotation angle estimation portion that estimates the rotation angle of the motor and outputs an estimate rotation angle signal; and a driving control portion that controls driving of the motor on the basis of the rotation angle signal, which is output from the rotation angle detection portion, when the abnormal condition detection portion does not detect an abnormal condition of the rotation angle detection portion, and controls driving of the motor on the basis of the estimate rotation angle signal, which is output from the rotation angle estimation portion, when the abnormal condition detection portion detects an abnormal condition of the rotation angle detection portion.02-10-2011
20110035112STEERING SYSTEM HAVING MULTIPLE STRATEGIES AND VARIABLE DEADZONE - A steering system for a machine having at least one steerable traction device is disclosed. The steering system may have a steering actuator operatively connected to the at least one steerable traction device, and a travel speed sensor configured to generate a signal indicative of a travel speed of the machine. The steering mechanism may also have an operator input device having a deadzone. The deadzone may vary in response to the signal. The steering system may also have a controller in communication with the steering actuator, the operator input device, and the travel speed sensor. The controller may be configured to affect operation of the steering actuator in response to operation of the operator input device only when the operation of the operator input device deviates from the deadzone.02-10-2011
20110035109STEERING SYSTEM WITH AUTOMATED ARTICULATION CONTROL - An articulated machine and method of operation, the articulated machine having a first frame with a first traction device and a steering apparatus that controls a steering angle thereof, the first frame pivotally coupled to a second frame at an articulation joint, the second frame having a second traction device, a steering sensor configured to provide a steering signal indicative of the steering angle, and an electronic controller configured to automatically control an articulation angle based on the steering signal.02-10-2011
20110035111THREE WHEEL VEHICLE ELECTRONIC STABILITY SYSTEM AND CONTROL STRATEGY THEREFOR - A method for enhancing stability of a three wheel vehicle having a pair of front wheels and a single rear wheel, each of the wheels having a tire with a tire grip threshold. The method including deploying an electronic stability system (ESS) on the vehicle, providing the ESS with input from various vehicle sensors related to the longitudinal and lateral acceleration of the vehicle, causing the ESS to determine whether (i) a precursory condition indicative of a wheel lift exists and (ii) the tire grip threshold of any of the tires has been exceeded; and when a precursory condition indicative of a wheel lift exists and the tire grip threshold of none of the tires has been exceeded, causing the ESS to reduce the longitudinal acceleration of the vehicle by a first amount less than that which would cause the tire grip threshold of any of the tires to be exceeded.02-10-2011
20110118940MOTOR CONTROL UNIT AND VEHICLE STEERING SYSTEM - A motor is driven by the γ-axis current of a γδ coordinate system that is an imaginary rotating coordinate system. A command current value preparation unit sets the γ-axis command current value based on the command steering torque and the detected steering torque. The command current value preparation unit includes a command current increase/decrease amount calculation unit and an addition unit. The command current increase/decrease amount calculation unit calculates the current increase/decrease amount for the command current value based on the sign of the command steering torque and the deviation of the detected steering torque from the command steering torque. The current increase/decrease amount calculated by the command current increase/decrease amount calculation unit is added to the immediately preceding value of the command current value by the addition unit. Thus, the command current value in the present calculation cycle is calculated.05-19-2011
20110040449Method for correcting measurements of the torque exerted on a steering wheel of an automobile vehicle electric power-assisted steering - The method consists of, when the instantaneous speed of the vehicle is greater than a pre-determined threshold: identifying that the vehicle travels in a straight line without torque exerted on the steering wheel; if the prior condition is met, determining an average residual torque for the steering wheel by calculating a sliding scale of measures of torque on the steering wheel; calculating a correction, if the average residual torque on the steering wheel is greater than a pre-determined minimum torque, which is proportional to the average residual torque to be applied to the torque measures on the steering wheel; calculating effective correction limited in terms of the speed of variation and amplitude in relation to the correction applied to the measures of torque on the steering wheel, said corrected measures being subsequently treated by the electronic calculator in order to control the electronic booster motor.02-17-2011
20100152973CONTROL METHOD FOR VEHICLE - Disclosed is a method of controlling a vehicle safely and stably. The method involves determining whether the vehicle is moving forward or backward without a TCU or a specific sensor for detecting whether the vehicle is moving forward or backward. The method further involves controlling at least one apparatus of the vehicle for controlling the wheels based on the determination.06-17-2010
20100023221METHOD FOR CONTROLLING A VEHICLE STEERING SYSTEM - Systems and methods for controlling a vehicle steering system are provided. In one exemplary embodiment, the method includes receiving a desired front road wheel angle signal at a controller. The desired front road wheel angle signal is indicative of a desired front road wheel angle of vehicle wheels. The method further includes receiving a parking assist request signal at the controller indicating a parking assist operational mode is desired. The method further includes generating a desired motor torque signal for controlling a power steering motor in the parking assist operational mode utilizing the controller, based on the desired front road wheel angle signal and the parking assist request signal.01-28-2010
20090048736STEER BY WIRE CONTROL SYSTEM - The invention provides a steering system for a vehicle, a ship etc. The steering system has a steering handle for the operator of the vehicle, a set of signal processors, a sensor which determines a position of the steered element of the vehicle, and a controller which moves the steered element. The steered element could e.g. be the front wheels of a car. The signal processors are adapted to determine an error between the desired position of the steered element and an actual position of the steered element. In order to make the steering system more fault tolerant, the error signal is amplified based on the speed by which the steering handle is moved, and an error in the sensor therefore becomes less critical. The invention further provides a steering method, a steering control unit and a vehicle provided with a steering system of the mentioned kind.02-19-2009
20090048735METHOD AND DEVICE FOR CONTROLLING TURNING ANGLE OF A MOTOR VEHICLE REAR WHEEL - A device including a mechanism that executes a control law and a mechanism responsive to a rear wheel turning angle instruction derived from the control law for making the angle dependent on the instruction. Further, a mechanism monitors signals representing input variables of the control law, designed to indicate an error in the current value of one of the variables and in replacing the current value with a previous certain value of the variable. In a case of a persistent error, the control law is replaced by a mode involving secure computing of the rear wheel turning angle.02-19-2009
20090216407ELECTRICAL POWER STEERING SYSTEM FOR A MOTOR VEHICLE - An electrical power steering system for a motor vehicle. The system includes a rack actuator and a sensor for measuring torque applied to the steering wheel by the driver, the actuator and the sensor being arranged on the steering column, respectively between the steering wheel and the rack, and between the actuator and the steering wheel. The system develops a final assistance torque of the electrical power steering, which is adapted to simulate an identical localization of the rack actuator and the torque measuring sensor on the steering column, such that the Bode diagram phase representing the operation of the system is essentially nil at the two main frequencies of the mechanical resonance of the system.08-27-2009
20090216406METHOD AND SYSTEM FOR MANAGING THE TURNING OF A VEHICLE - A method and system for managing the turning of a vehicle comprises establishing a boundary of a work area. A location-determining receiver determines an observed position and velocity of the vehicle in the work area. An estimator estimates a first duration from an observed time when the vehicle will intercept the boundary based on determined position and velocity of the vehicle. An alert generator generates an alert during a second duration from the observed time. The second duration is less than the first duration by a control time window. An operator interface allows an operator to enter a command to control a path of the vehicle prior to or at the boundary.08-27-2009
20100070138PARK-STEERING ASSISTANCE SYSTEM HAVING AN IMPROVED SWITCH-ON AND SWITCH-OFF LOGIC - A method for operating a park-steering assistance system and a park-steering assistance system provide an improved switch-on and switch-off logic. The park-steering assistance system, which provides a driver with assistance functions and/or services in connection with driving a motor vehicle into and/or out of a parking space, includes a switch-on and switch-off logic, which is provided to activate the park-steering assistance system as a function of a signal of a control element and to deactivate the park-steering assistance system as a function of a velocity value of the motor vehicle and as a function of a specified first velocity threshold value, a specified second velocity threshold value existing, which is lower than the first velocity threshold value, and the switch-on and switch-off logic being arranged to switch the park-steering assistance system from the activated state to a temporarily deactivated state or from the temporarily deactivated state to the activated state as a function of a comparison of the variables of the velocity value and the second velocity threshold value.03-18-2010
20100063684ELECTRIC POWER STEERING SYSTEM CONTROL METHODS - An electric power steering system of a vehicle includes a controller for controlling an electric motor connected to a steering column or other steering mechanism. The velocity of the motor must be determined to maintain the proper current to the motor. A method of estimating the velocity includes obtaining a first and second velocity signals from one or more sensors monitoring the motor. The first and second signals have different characteristics, e.g., the first signal may have a higher resolution than the second signal. An acceleration (or deceleration) of the velocity of the electric motor is computed based on the different representations of the velocity supplied by the different signals. An estimate of the velocity of the motor is then determined based on the acceleration/deceleration and the different representations of the velocity. The electric current provided to the electric motor is then adjusted based on the estimated velocity to meet the desired motor output (i.e., motor torque and velocity).03-11-2010
20110178681METHOD OF PROTECTING MOTOR-DRIVEN STEERING SYSTEM FROM OVERHEAT - In a method of protecting a motor-driven power steering system from overheat, it is possible to prevent a set temperature value from being largely increased by the peripheral circuits of the electronic control unit and improve safety of the motor-driven power steering system by controlling steering current on the basis of the accurate temperature without the effect by the peripheral circuits, by determining when a temperature value measured by a temperature sensor of an electronic control unit is measured high by the peripheral circuits of the electronic control unit and making the set temperature value close to a previous-set temperature value.07-21-2011
20110098890SYSTEMS AND METHODS FOR DRIVER INTERVENTION IN AN AUTOMATIC STEERING SYSTEM - A vehicle steering system includes an automatic steering control unit configured to control the vehicle steering system when in an automatic operational state and a driver intervention unit is configured to determine driver intervention during the automatic operational state. The driver intervention unit comprising a decision software module configured to determine driver intervention.04-28-2011
20100070139Vehicle maneuver assistance device - The vehicle maneuver assistance device includes: a plurality of external environment imaging units; a converter that performs a view point conversion; a display unit provided in an interior of the present-vehicle; a steering angle status value detector which detects status values of the steering angle representing an actual steering angle of the present-vehicle, and outputs a steering angle status value; a display controller that causes the display unit to display the converted image, and, overlaid thereon, a guidance display which assists a parking maneuver of the present-vehicle, wherein the display controller controls the guidance display according to the steering angle status value, so that the guidance display includes: an initial positioning guide line representing an initial location of the present-vehicle at the beginning of the parking maneuver; and a steering-switching start positioning guide line representing a starting location of a quick steering direction switching.03-18-2010
20110251759DEVICE AND METHOD FOR DETERMINING A ROADWAY COEFFICIENT OF FRICTION FOR A VEHICLE - A device for determining a roadway coefficient of friction for a vehicle, having a first tire steering device for setting a first predetermined steering angle (α10-13-2011
20110153163MOVEMENT INPUT APPARATUS APPLIED TO STEERING APPARATUS AND MOBILE CONTROL SYSTEM USING THE SAME - There is provided a movement input apparatus applied to a steering apparatus and a mobile control system using the same. In detail, the steering apparatus performing steering or adjusting functions includes: a movement input apparatus including a signal detector that is attached or embedded in a surface of a steering apparatus and uses a resistive conductive yarn to detect finger contact signals; an estimator that receives the finger contact signals detected in the signal detector to estimate a status of an operator; and a display unit that converts and displays the estimated movement of the operator into signals of a type able to be sensed by a user; an extractor that analyzes the status information transmitted from the transmitter to extract the operational signals of the user; a controller that generates and transmits control signals for external devices according to the extracted operational signals of the user.06-23-2011
20110077825TURNING DRIVE CONTROL UNIT AND CONSTRUCTION MACHINE INCLUDING SAME - A turning drive control unit configured to control driving of the rotation mechanism of a construction machine driven to turn by an electric motor includes a drive command output part configured to output a speed command driving the electric motor based on the amount of operation input via the operation part of the construction machine; a rotation speed detection part configured to detect the rotation speed of the electric motor; and a drive command generation part configured to generate a drive command driving the electric motor based on the speed command output from the speed command output part and the rotation speed detected by the rotation speed detection part. At a time immediately before a rotation stop of the electric motor, the drive command generation part causes the braking torque of the electric motor to be smaller than before the time immediately before the rotation stop.03-31-2011
20110077824Steering Control During Split Mu Braking - An electric assisted steering control strategy for a steering system for a vehicle is arranged to assist the driver in controlling the vehicle during a split mu braking operation. The steering is provided with assistance being based on at least one operational variable representing a corrective steer angle for the vehicle which is added to a main assistance torque via a driver feedback controller, and the strategy is adapted to employ an estimate of yaw moment of the vehicle as the operational variable, the yaw moment being determined by processing the speed of wheels on opposite sides of the vehicle.03-31-2011
20110071730ELECTRIC POWER STEERING SYSTEM - An ECU of an electric power steering system includes a driving circuit configured as an H bridge circuit; a microcomputer that controls the driving circuit; a capacitor for stabilizing electric power that is supplied to the driving circuit; and a resistor that is interposed in a second power supply path that bypasses a first power supply path in which the relay contact is interposed. The microcomputer causes a relay circuit to be activated after the capacitor is charged via the resistor (second power supply path). The microcomputer determines whether a stuck-open fault has occurred on the basis of a voltage difference between terminals of the relay contact at the time when both FETs that are connected in series and that constitute the driving circuit are turned on to cause the discharge of the capacitor after the relay circuit is activated.03-24-2011
20110071731METHOD AND SYSTEM FOR COLLISION AVOIDANCE - A method for collision avoidance for a host vehicle includes the following steps; receiving input data relating to a set of objects external to the host vehicle, wherein an object position (r,Φ), and an object velocity ({dot over (r)}) are associated with each object by a sensor system arranged on the host vehicle, then estimating future trajectories of each external object, while considering influence by the future trajectories of the other external objects.03-24-2011
20110060505DEVICE/METHOD FOR CONTROLLING TURNING BEHAVIOR OF VEHICLE - A vehicle turning behavior control apparatus comprises a controlling section which limits a turning behavior of a vehicle caused by a steering operation, to a limit behavior corresponding to an actual steering speed, by a vehicle speed decrease. The controlling section is configured to determine a modified steering speed in accordance with the actual steering speed, and to determine the limit behavior in accordance with the modified steering speed. The controlling section is further configured to make the modified steering speed higher than the actual steering speed when the actual steering speed decreases during a turning steering for increasing a steering amount. For example, the actual steering speed is used directly as the modified steering speed while the actual steering speed during the turning steering is increasing. While the actual steering speed during the turning steering is decreasing, the modified steering speed higher than the actual steering speed is used.03-10-2011
20120150389ELECTRIC POWER STEERING SYSTEMS WITH IMPROVED ROAD FEEL - A method is provided for controlling a motor drive torque in an EPS system having a motor and a steering assembly. The method includes receiving a torque signal from the steering assembly; processing the torque signal in accordance with a steering perception program to produce a motor control signal; and controlling the motor drive torque based on the motor control signal.06-14-2012
20100305815ELECTRIC POWER ASSISTED STEERING APPARATUS - An electric power assisted steering apparatus for a vehicle, comprising:12-02-2010
20090005934LANE DEVIATION PREVENTION CONTROLLER - A deviation controller to prevent deviation of a vehicle from a lane of travel includes a displacement estimator configured to estimate a future lateral displacement of the vehicle with respect to the lane of travel, a detecting device configured to detect a tendency of the vehicle to deviate from the lane of travel, a prevention controller configured to apply a yaw moment to correct a travel path of the vehicle when the tendency of the vehicle to deviate from the lane of travel is detected, a correction canceling device configured to cancel the yaw moment of the prevention controller when a steering angle exceeds a canceling threshold, and a threshold adjusting device configured to adjust the canceling threshold in response to the estimated future lateral displacement.01-01-2009
20100004825STEERING DEVICE FOR VEHICLE - A motor vehicle steering apparatus is provided with: a steering-angle feedforward-control-value setting unit arranged to set a steering angle value that corresponds to a steering state; a vehicle-behavior-stabilization controlling unit including a steering-angle feedback-control-value setting unit arranged to set a steering-angle correction value that corresponds to vehicle behavior; and a feedback-gain changing unit arranged to decrease a gain of the steering-angle feedback-control-value setting unit to a value less than at a normal time, when the steering-angle correction value is equal to or less than a predetermined value, during vehicle-behavior stabilizing control by the vehicle-behavior-stabilization controlling unit.01-07-2010
20090319129MOTOR VEHICLE DRIVER ASSISTING METHOD - A method is provided for assisting the driver of a motor vehicle that includes, but is not limited to estimating a maximum safe amount of lateral acceleration based on one or more of detected vehicle lateral acceleration, yaw rate, vehicle longitudinal speed and steering wheel angle, calculating a longitudinal vehicle speed to produce a lateral acceleration equal to said maximum safe amount, and displaying a recommended longitudinal vehicle speed to the driver.12-24-2009
20090240399Three-Wheel Vehicle Electronic Stability System and Control Strategy Therefor - A method for enhancing stability of a three wheel vehicle having a pair of front wheels and a single rear wheel, each of the wheels having a tire with a tire grip threshold. The method including deploying an electronic stability system (ESS) on the vehicle, providing the ESS with input from various vehicle sensors related to the longitudinal and lateral acceleration of the vehicle, causing the ESS to determine whether (i) a precursory condition indicative of a wheel lift exists and (ii) the tire grip threshold of any of the tires has been exceeded; and when a precursory condition indicative of a wheel lift exists and the tire grip threshold of none of the tires has been exceeded, causing the ESS to reduce the longitudinal acceleration of the vehicle by a first amount less than that which would cause the tire grip threshold of any of the tires to be exceeded.09-24-2009
20120065842Method and Apparatus for Controlling Active Rear Steering - A controller of an active rear steering (ARS) control system includes a processor and a software module. The software module includes instructions that, when executed by the processor, cause the processor to determine rear steering angles, determine a vehicle state, determine shaping functions, and determine a rear steering command.03-15-2012
20080319612Vehicle Driving Control Unit - A control unit 12-25-2008
20090112405ELECTRIC POWER STEERING APPARATUS - An assist gradient Ra and also an F/B gain gradient Rp are inputted to an assist gradient compensation control unit. The F/B gradient Rp is added to the assist gradient Ra in an adder and the sum obtained is inputted into a switching control unit. The assist gradient Ra that has been inputted from a basic assist control unit is directly inputted together with the sum to the switching control unit. When a torque feedback control is executed, the switching control unit outputs the sum of the assist gradient Ra and F/B gain gradient Rp to a filter constant computation unit and an assist gradient gain computation unit.04-30-2009
20120203432Adaptive Front-Lighting System with Fuzzy Logic Control - An adaptive front-lighting system is provided for a vehicle, such as a passenger car, truck, or tractor trailer. A plurality of LED light sources on the vehicle have a projection pattern for exterior illumination to supplement a main beam from a main light source. A power supply drives the LED light sources according to a driving signal having a magnitude between a minimum driving signal and a maximum driving signal, wherein the LED light sources sequentially illuminate in response to the magnitude of the driving signal. A speed sensor characterizes an instantaneous vehicle speed. A turn sensor characterizes an instantaneous turning radius. A fuzzy controller generates the driving signal in response to the instantaneous vehicle speed and the instantaneous turning radius based on a fuzzy model. The fuzzy model is characterized by a plurality of empirically-derived fuzzy rules that define discontinuous values and by a plurality of modified consequents that produce a substantially continuous output.08-09-2012
20080275609AUTOMATIC STEERING SYSTEM AND METHOD FOR A WORK VEHICLE WITH FEEDBACK GAIN DEPENDENT ON A SENSED PAYLOAD - An automatic steering system for a work vehicle comprises a position sensor for detecting a position of the vehicle, a memory for storing information about a nominal path of the vehicle and a control unit coupled to the position sensor, to the memory and to a steering actuator for steering the vehicle. The control submits control signals to the steering actuator that depend upon a feedback gain and a lateral offset between the actual position and the nominal path. The feedback gain depends upon a sensed payload of the vehicle.11-06-2008
20130158808MOTOR CONTROL APPARATUS AND ELECTRIC POWER STEERING APPARATUS - A motor control apparatus that drive-controls a motor by an inverter based on each-phase duty command values of PWM and detects each-phase motor currents of the motor by a one-shunt type current detector. The apparatus includes a current detection correcting section that calculates a current detection correction value based on a power-supply voltage of the motor, each-phase duty command values, a back-EMF information of the motor, each-phase motor currents detected by the current detector, arrangement information of the PWM, and electric characteristic formula of the motor, thereby to correct the each-phase motor currents detected by the current detector to a motor average current by the current detection correction value and drive-controls the motor.06-20-2013
20080255729Steering Assist System and Vehicle Mounted with the Same - An object of the present invention is to provide a steering assist system capable of showing a driver an appropriate direction of steering operation in advance and correctly, and without impairing safety, and shortening an operation time during collision avoidance, in particular, reducing an idle running time. It is another object of the present invention to provide a vehicle mounted with such a steering assist system.10-16-2008
20120136540Fail Safe Operational Steering System for Autonomous Driving - This invention refers to an electrically assisted steering system that includes a torque sensor connected to a vehicle steering wheel. The system also includes a torque control ECU that is responsive to torque signals from the torque sensor to generate a motor assist requirement signal. The system further includes a motor control ECU responsive to the motor assist requirement signal to generate a motor control signal. The system additionally includes a steering assist motor responsive to the motor control signal to provide a steering assistance torque to the vehicle steering system. Finally, the system includes a safety domain ECU connected to at least one vehicle operational parameter sensor to generate a torque signal and send the same signal to the torque control ECU. The safety domain ECU is also being in communication with the torque control ECU and the Motor control ECU.05-31-2012
20110054740ELECTRIC POWER STEERING CONTROL APPARATUS - To obtain an electric power steering control apparatus hard to generate vibration even when accuracy is not high enough for torque vibration of extremely small output of torque detecting means. An electric power steering control apparatus includes steering torque detecting means, a torque controller that computes an auxiliary torque current, a motor that generates a torque for assisting a steering torque, current steering component removing means for removing a component by steering, vibration velocity estimating means for estimating a vibration velocity in a rotational direction of the motor, and a damping controller that computes a damping current to be added to the auxiliary torque current, and the vibration velocity estimating means includes vibration acceleration computing means for computing vibration acceleration in the rotational direction of the motor by multiplication of a motor current output from the current steering component removing means, and rotational acceleration integrating means for computing the vibration velocity in the motor rotational direction by integrating the vibration acceleration computing means.03-03-2011
20110022273Method and Device for Steering a Second Agricultural Machine, Which Can Be Steered to Drive Over a Field Parallel to a First Agricultural Machine - The present invention is directed to a device for steering a second agricultural machine which can be steered over a field relative to a first agricultural machine. The device includes a distance meter mounted on one of the machines and operable for recording measured values with regard to direction and distance of objects adjacent to the distance meter over a horizontal region. The device also includes an evaluating means which is connected to the distance meter and is designed to output a steering signal for causing guidance of the second machine relative to the first machine on the basis of the measured values of the distance meter.01-27-2011
20100324785MOTOR-DRIVEN POWER STEERING CONTROL DEVICE - Provided is an electric power steering control device capable of performing damping control without current detection to perform stable damping control even when a target current and an actual current value differ from each other. The electric power steering control device includes steering torque detection means for detecting a steering torque, a torque controller for computing an assist torque current, a motor for generating a torque for assisting the steering torque, rotation speed estimation means for estimating a rotation speed of the motor, and a damping controller for computing a damping current by using an estimated value of the rotation speed of the motor. The rotation speed estimating means includes steering component removing means for steering torque, for removing a component due to steering from an output of the steering torque detection means, rotation angle corresponding value computing means for multiplying an output of the steering component removing means for steering torque by an inverse number of a rigidity of a torsion bar and −1 to compute a value corresponding to a rotation angle, and a rotation angle differentiator for differentiating an output of the rotation angle corresponding value computing means to compute a value corresponding to a rotation angular velocity.12-23-2010
20110125371Auto-Steerable Farming System - A steering system for a towable implement includes a steering sensor, an implement steering controller, a steering control valve, a steering cylinder, and an implement steering mechanism that steers the implement. The steering sensor measures, directly or indirectly, the angular position of the steerable wheels of the implement. The implement steering controller processes feedback from the steering sensor and with a desired steering angle, outputs a steering control signal that is input to the steering control valve. The steering control valve controls the flow of hydraulic fluid to the steering cylinder, which, in turn, powers the implement steering mechanism to turn the wheels of the implement. The steering system may be operated in various control modes, such as, a transportation steering mode, a corner and 180 turn steering mode, a swath tracking steering mode, crab steering mode, and a manual steering mode, which allows manual control of the steering system.05-26-2011
20110137524ANGLE CONTROL METHOD AND APPARATUS, AND AUTOMATIC PARKING SYSTEM USING THE SAME - The present invention relates to a technology related to angle control and automatic parking, and more particularly to an angle control method and apparatus for improving angle control quality so as to make the movement of a steering handle smooth, and an automatic parking system using the same.06-09-2011
20100312434VEHICLE DRIVING ASSISTANCE - A vehicle (12-09-2010
20100324784NARROW-FREQUENCY-BAND FEEDBACK CONTROL OF STEERING PINION TORQUE IN AN ELECTRIC POWER STEERING SYSTEM - A narrow band feedback control system is provided to mitigate a disturbance within a predetermined bandwidth that is received by an electric power steering (EPS) system within a vehicle. A torque sensor calculates a torque value associated with the disturbance applied to the EPS system, the torque sensor outputs a torque signal related to the torque value. A filter receives the torque signal, filters the torque signal to the bandwidth associated with the external disturbance, and outputs a filtered torque signal. An amplifier receives the filtered torque signal, adjusts the gain of the filtered torque signal, and outputs a filtered, amplified torque signal. A logic module receives the filtered, amplified torque signal, generates a counter torque signal that is an inverse of the filtered, amplified torque signal and outputs the counter torque signal to the EPS system to mitigate the torque received from the external source.12-23-2010
20100121532VEHICLE SAFETY DRIVING APPARATUS - In a vehicle safety driving apparatus, a predetermined steering torque is applied as the warning and a change amount of driver's steering torque relative to the applied predetermined steering torque is calculated, and a contact avoidance assistance operation is conducted in place of applying the predetermined steering torque when the calculated driver's steering force change amount is less than a set value. With this, it becomes possible to conduct more perceivable operation or vehicle control when it is estimated that the driver does not recognize it, thereby enabling to assist the contact avoidance appropriately.05-13-2010
20090292421STEERING APPARATUS - An apparatus for use in turning steerable vehicle wheels upon manual rotation of a hand wheel includes a torque sensor connected with the hand wheel. A controller is connected with the torque sensor and a rear steering gear. The controller is operable to effect operation of the rear steering gear in response to an output from the torque sensor upon manual application of at least a predetermined torque to the hand wheel. The torque sensor has an output which corresponds to a torque which is less than the predetermined torque throughout turning of the front wheels through a first range of turning movement. The torque sensor has an output which corresponds to a torque which is at least as great as the predetermined torque which occurs when turning of the front wheels during a second range of turning movement of the front wheels. The controller is operable to effect operation of the rear steering gear in response to the output from the torque sensor through the first range of turning movement of the front wheels so that the steering angle of the rear wheels has a first relationship to the steering angle of the front wheels. The controller being operable to effect operation of the rear steering gear in response to the output from the torque sensor through the second range of turning movement of the front wheels so that the steering angle of the rear wheels has a second relationship different from the first relationship to the steering angle of the front wheels.11-26-2009
20110153162MOTOR-DRIVEN POWER STEERING CONTROL APPARTUS - A motor-driven power steering control apparatus is achieved, which uses a small-amplitude pass filter, the filter filtering out a component having a small amplitude, to remove a steering component from dynamic state quantity such as a rotational speed signal, and to accurately extract only a vibration component having a small amplitude compared with the steering component, and controls the vibration component to be reduced.06-23-2011
20100030429STEERING OPERATION FORCE DETECTING APPARATUS - A steering operation force detecting apparatus enabling to know in detail a force or a moment applied to a steering wheel rim (steering wheel) gripped by a driver during steering is provided. A force and a moment applied to each divided portion 02-04-2010
20100030430VEHICLE DRIVING CONTROL APPARATUS AND VEHICLE DRIVING CONTROL METHOD - A vehicle driving control apparatus is provided with a lane detecting device, a future position estimating device and a vehicle control device. The lane detecting device detects a lane marker of a lane. The future position estimating device estimates a future transverse position of a host vehicle after a prescribed amount of time. The vehicle control device executes a vehicle control such that a yaw moment is imparted to the host vehicle toward a middle of the lane. The yaw moment is imparted upon determining that the future transverse position is positioned laterally farther toward an outside of the lane from the middle of the lane than a prescribed widthwise lane position that is determined in advance using the lane marker as a reference. The vehicle control device suppresses an impartation of the yaw moment device when a recognition degree of the lane marker is lower than a prescribed value.02-04-2010
20100023220VEHICLE AND CONTROL METHOD OF THE SAME - To enable execution of processing for eliminating a slip by detecting the occurrence of a slip between rotary bodies and a road surface. An inverted pendulum type vehicle (01-28-2010
20100023218VEHICLE DRIVING CONTROL APPARATUS AND VEHICLE DRIVING CONTROL METHOD - A vehicle driving control apparatus is provided with an obstacle detecting device, a future position estimating device, an obstacle avoidance control device, and a lane change intent detecting device. The obstacle detecting device detects an existence of an obstacle positioned laterally of a host vehicle. The future position estimating device estimates a future position of the host vehicle after a prescribed amount of time. The obstacle avoidance control device executes an obstacle avoidance control. The lane change intent detecting device detects an intent of a driver to effect a lane change and a direction of the intended lane change. Therefore, when it is detected that the driver intends to move to an adjacent lane located on the opposite side of the vehicle as the side containing the obstacle, a control suppressing portion of the obstacle avoidance control device suppresses the obstacle avoidance control.01-28-2010
20100023217Rear wheel steering angle controlling device for vehicles - The present invention provides a rear wheel steering angle controlling device for vehicles comprising: a rear wheel steering mechanism (01-28-2010
20100023216ADAPTIVE VEHICLE CONTROL SYSTEM WITH DRIVING STYLE RECOGNITION BASED ON VEHICLE LEFT/RIGHT TURNS - An adaptive vehicle control system that classifies a driver's driving style based on left/right-turn maneuvers. A process determines if the vehicle has started a turn if the yaw rate is greater than a first yaw rate threshold, and determines a vehicle heading angle based on the yaw rate and a sampling time if the vehicle has started a turn. The process then determines whether the vehicle maneuver has been completed by determining if the yaw rate is less than a second yaw rate threshold. The process then determines that the completed maneuver was a left/right-turn maneuver if the yaw rate is less than a third yaw rate threshold over the sampling time and the vehicle heading angle is within a heading angle range for a time period less than a predetermined time threshold. In one non-limiting embodiment, the heading angle range is between 75° and 105°.01-28-2010
20110218708POWER STEERING DEVICE - A power steering device sets an applied friction torque applied to a steering wheel based on a real steering angle and a target steering angle, and performs a control of applying the applied friction torque to the steering wheel. An applied friction torque changing unit changes the applied friction torque, which is calculated from the real steering angle and the target steering angle, when the vehicle reverses. Concretely, the unit changes the applied friction torque to a smaller value when the vehicle reverses than that when the vehicle advances. Thereby, it is possible to decrease the applied friction torque properly when the vehicle reverses, and it become possible to improve the maneuverability of the steering wheel.09-08-2011
20100017064METHOD FOR TUNING ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus is tuned by a step-01-21-2010
20100017063ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus in which the intensity and directions of drive currents flowing in remaining phases continues motor rotation driving. An abnormality detect unit (01-21-2010
20110029202VEHICLE MOTION STABILITY CONTROL SYSTEM - Provided is a vehicle motion stability control system that combines the VSA and RTC devices in a favorable manner, and is able to effectively control the behavior of the vehicle over an entire operating range including an extreme operating region and a normal operating region. An output of the RTC is transformed by a certain transfer function, and the front wheel steering angle δ02-03-2011
20100023219Optical Steering Angle Sensor For Determining The Absolute Value of The Steering Angle - An optical steering angle sensor for determining the absolute value of the steering angle even when a steering wheel has been revolved several times is provided, having a stator, a rotor with a barcode and evaluation electronics. In one form, the invention provides for the rotor to have a track groove which is arranged in the form of a worm in order to determine the number of revolutions, which track groove has an associated driver finger on the stator, which engages in the track groove and is arranged in a bearing such that it can pivot, and has a holder for a magnet which can pivot with the driver finger and which driver finger has an associated stationary Hall sensor, which is provided in an evaluation circuit.01-28-2010
20120041645STEERING CONTROL APPARATUS FOR VEHICLE AND STEERING CONTROL METHOD - A method for controlling a steering device with steering power support means for a motor vehicle with at least one steerable road wheel, where the steering device may include a steering shaft with a first end to adopt a steering wheel, a control device controlling said power support means, sensing means detecting steering shaft torque introduced in said steering shaft, and means to determine a hands-off situation in which the driver does not introduce a torque into said steering shaft, wherein the steering power support means support the driver on the basis of a driver demand introduced into the steering shaft, may comprise determining a steering wheel torque on basis of the steering shaft torque; determining a time derivative of the detected steering wheel torque; if the absolute value of the steering wheel torque is lower than a threshold torque limit and if the absolute value of the derivative of steering wheel torque is lower than a threshold derivative torque limit, a counter is increased by one count; if the absolute value of the steering wheel torque is higher or equal than a threshold torque limit, or/and if the absolute value of the derivative of steering wheel torque is higher or equal than a threshold derivative torque limit-, said counter is decreased by one count; and if said counter has a value equal to or higher than a threshold count limit the hands-off state is determined.02-16-2012
20110137525ELECTRIC POWER STEERING CONTROL SYSTEM - Intended is to solve the problem of an increase in the cost of an electric power steering control system, the oscillations of which are suppressed by estimating and feeding back the oscillation frequency components of a motor rotating speed through an observer from a steering torque signal and a current signal for driving a motor, no matter whether a phase compensator might be made of an analog circuit or a software. In order to solve this problem, there is provided the electric power steering control system, in which the phase compensator of the steering torque is made of an analog circuit and in which an anti-phase compensator is made over the software of a microcomputer, thereby to eliminate the changes in the gain and the phase by the phase compensator of the analog circuit near the oscillation frequency, so that the steering torque signal equivalent to that of no phase compensation necessary for the computation at the observer is computed from the phase-compensated steering torque signal.06-09-2011
20100235054STEERING ANGLE SENSOR - A steering angle sensor for determining absolute angular position of a steering wheel of a motor vehicle is disclosed. The steering angle sensor includes a steering angle sensor for determining absolute angular position of a steering wheel shaft of a motor vehicle, the steering angle sensor comprising a first rotational member coupled to the steering wheel shaft; the steering wheel shaft and the first rotational member being rotatable about a first rotational axis through a rotational range including a plurality of revolutions of the steering wheel shaft; a second rotational member rotatable about a second rotational axis, the second rotational member is operably coupled to the first rotational member; a first sensing device including a first sensing element, the first sensing device positioned adjacent to the second rotational member to generate a first signal used to determine rotational position of the second rotational member over a single turn of the second rotational member; a third rotational member rotatable about a third rotational axis, a reduction gear operably couples the second and third rotational members; at least four second sensors positions adjacent to the third rotational member; and the third rotational member includes a plurality of indexing elements disposed on the third rotational member and at least partially circumscribing the third rotational axis, the indexing members and the second sensors cooperatively positioned to generate a second signal used to determine the number of rotations of the steering wheel shaft.09-16-2010
20090276124Vehicle stability control device - There is provided a new and novel vehicle stability control device through steering wheels independently of the driver's handling operation, in which a suitable steering angle parameter in determining a target value for a turning state parameter is selected. The control device calculates a provisional target steering angle for wheels based upon an amount of an operation of a driver and a predetermined steering characteristic; a target value for the turning state parameter; and a target steering angle for wheels for reducing a magnitude of a deviation of the actual turning state parameter from its target value when the magnitude of the deviation is at a reference value or above, and thereby controlling a steering angle based upon the target steering angle. During execution of controlling the steering angle based upon the target steering angle, the target value of the turning state parameter is calculated based upon the provisional target steering angle.11-05-2009
20130197763CONTROL METHOD AND UNIT FOR A STEERING SYSTEM - A method and unit to control a steering system for a road vehicle, which steering system adjusts the steering angle of the front wheels of the road vehicle by means of a steering wheel; in a preliminary design and optimization step, an actual transmission error is determined, caused by the mechanical structure of a transmission device of the steering wheel which mechanically connects a steering wheel to a steering rod mechanically connected to the hubs of the front wheels; the current angular position of the steering wheel is measured; and the intensity of the servoassistance force applied by a servomechanism to the steering rod is changed as a function of the current angular position of the steering wheel and as a function of the actual transmission error.08-01-2013
20100168964MOTOR VEHICLE STEERING APPARATUS - A motor vehicle steering apparatus (07-01-2010
20090210113Vehicle Steering System Comprising a Degraded Operating Mode In Case of Breakdown of a Wheel Steering Actuator - Steering control system for a land vehicle with at least four steered wheels (08-20-2009
20120209475Electric Power Steering Control Methods And Systems Using Hysteresis Compensation - A control system for a steering system is provided. The control system includes a direction determination module, a position determination module, and a final command module. The direction determination module determines a change in a handwheel torque. The position determination module determines a position on a hysteresis loop. The position on the hysteresis loop depends on the change in the handwheel torque. The final command module determines a final assist value based on the position. The final command module generates an assist command.08-16-2012
20120116636METHOD FOR CONTROLLING A STEER-BY-WIRE STEERING SYSTEM - A method is aimed at controlling a steer-by-wire steering system of a vehicle having at least one steering axle having at least two steer wheels electronically controlled by a control member. In the case of asymmetric adhesion conditions, the method anticipates steering into the skid for the first steer wheel that is on the surface exhibiting the higher coefficient of adhesion—for example asphalt—so as to counter a moment applied to the Z-axis. At the same time, the second steer wheel which is on the surface having the lower coefficient of adhesion—for example a sheet of black ice—remains in the vehicle direction of travel or is oriented towards the second steer wheel in a snow plough mode. The vehicle stability is vastly improved when the vehicle regains an area of uniform adhesion.05-10-2012
20120010783MOVEMENT DIRECTION CONTROL APPARATUS AND COMPUTER PROGRAM - In a movement direction control apparatus and a non-transitory computer readable medium, a reaction torque accompanying rotation of a rotor is utilized to control a rotation angle of a body in a yaw direction. A specification of a yaw angle of a wheel as a target of the movement direction is received, and information of a friction torque is acquired. A rotation angular acceleration in the yaw direction is calculated, based on the yaw angle, the specification of which has been received, and the reaction torque is calculated, based on the calculated rotation angular acceleration in the yaw direction. An operation instruction to a motor for yaw is generated, based on the calculated reaction torque and the acquired information of the friction torque.01-12-2012
20120059550ELECTRIC POWER STEERING SYSTEM - An electric power steering system determines a steering state of a steering wheel on the basis of a current (Im) of a motor applying assist force to a steering system and a steering speed (ωs) of the steering wheel. A state where the steering wheel is retained at a position other than a neutral position is a retained state, and a state where the steering wheel is placed at the neutral position is a neutral state. When the steering speed (ωs) is lower than a determination value (ωa) and the motor current (Im) is larger than a reference value (Ix), it is determined whether the steering state is the neutral state. When the steering speed (ωs) is lower than the determination value (ωa), the motor current (Im) is larger than the reference value (Ix), and the steering state is determined to be the neutral state at immediately preceding determination, the steering state is determined to be the neutral state.03-08-2012
20120022746SADDLE RIDING TYPE VEHICLE AND STEERING DAMPER DEVICE FOR USE IN SADDLE RIDING TYPE VEHICLE - A saddle riding type vehicle that reduces steering pull of a handle caused by a disturbance and also prevents degradation in a steering feeling includes a detector that detects a steering angle of a steering shaft, a steering damper, and a control device. The steering damper is arranged around the steering shaft and includes an electromagnet, a magnetic member, and a magnetic fluid stored in a gap between the electromagnet and the magnetic member. The control device includes a steering angular velocity determiner adapted to determine a steering angular velocity based on a steering angle detected by the detector, an instructor adapted to instruct a supply of current to the electromagnet for a first reference time when the determined steering angular velocity exceeds a first reference velocity and to instruct a stopping or reduction of the current supply after the first reference time elapses, and a driver that supplies the electromagnet with current in response to an instruction from the instructor.01-26-2012
20120022745METHOD FOR OPERATING A STEERING SYSTEM - A method for operating a steering system, a steering system of this type and a steering device of a vehicle are disclosed herein. The vehicle has a front axle and a rear axle, a slip angle of the front axle being influenced by steering of the rear axle in such a way that the slip angle remains constant over a steering wheel angular range.01-26-2012
20120209474METHODS, SYSTEMS, AND COMPUTER PROGRAM PRODUCTS FOR PROVIDING STEERING-CONTROL FEEDBACK TO AN OPERATOR OF AN AUTOMOTIVE VEHICLE - Methods and systems are described for providing steering-control feedback to an operator of an automotive vehicle. First attribute information is received that identifies a first attribute of a first operator coupling of an operator, of an automotive vehicle, to a steering-control mechanism of the automotive vehicle. A specified steering-control criterion is detected as met based on the first attribute. Feedback information is identified based on the steering-control criterion. In response to the detecting, the feedback information is sent to present, via an output device, a feedback indicator to the operator.08-16-2012
20090069981Method for Determining in Real Time, the Grip on a Steering Wheel of an Electric Power-Assisted Steering System for an Automobile - The invention concerns a method which includes: filtering the torque signal using a low-pass filter of the first order at a variable cut-off frequency which takes on, respectively, a minimum value or a maximum value depending on whether the amplitude of the torque signal is, respectively, lower or higher than a predetermined threshold; then in producing a signal indicating, respectively, a steering wheel release or a steering wheel grip depending on whether the amplitude of the filtered torque signal is, respectively, lower or higher than a predetermined threshold.03-12-2009
20100094507Electric power steering apparatus - An electric power steering system includes: a shaft angle sensor that outputs a signal indicating a rotation angle of a shaft through which a turning operation force is transmitted to a steering mechanism; a motor angle sensor that outputs a signal indicating a rotation angle of a motor; and a control section that determines the number of turns of the steering wheel based on both outputs of the shaft angle sensor and the motor angle sensor, wherein when it is required to determine the number of turns, the control section detects an angle error between the outputs of the shaft angle sensor and the motor angle sensor based on the outputs thereof and when the angle error falls within a predetermined allowable range, the control section determines the number of turns, and when the angle error is out of this range, the control section avoids determining the number of turns.04-15-2010
20110066332ELECTRIC POWER STEERING APPARATUS AND CONTROL DEVICE INTEGRATED-TYPE ELECTRIC MOTOR - An electric power steering apparatus and control device integrated-type electric motor includes an electric motor driving circuit constituted by a plurality of semiconductor power elements and controlling electric power supplied to an armature winding of an electric motor, a switch device for opening and closing a connection between an input terminal of the electric motor driving circuit and an external power source, and another switch device for opening and closing the armature winding, wherein at least one of both the switch devices is constituted by a semiconductor switch element, and the power elements and the semiconductor switch element are mounted on a board attached to a metallic case.03-17-2011
20110066331STEERING DEVICE FOR VEHICLE AND CONTROL METHOD FOR STEERING DEVICE - An assist control portion (03-17-2011
20110066330ELECTRIC POWER STEERING APPARATUS AND CONTROL METHOD FOR CURRENT THEREOF - Disclosed is an electric power steering apparatus including a steering system for receiving a steering torque of a steering wheel to steer wheels and an auxiliary power mechanism applying auxiliary steering power to the steering system, and a method of controlling a current of the electric power steering apparatus. The electric power steering apparatus includes a temperature sensor measuring a temperature at a starting of a vehicle, a motor position sensor detecting a relative steering angle of a motor, a cumulative transfer calculation unit calculating a cumulative transfer quantity of a rack bar by information detected in the motor position sensor, a counter calculating an elapsed time from a starting time of the vehicle, a friction coefficient determination unit determining a friction coefficient according to information inputted from the temperature sensor, the cumulative transfer quantity calculation unit, and the counter, respectively, by using a setting map of a friction coefficient, and a target current calculation unit calculating a compensation quantity for a friction by using the friction coefficient determined in the friction coefficient determination unit and determining a target current, so that it is possible to control the current for compensating for a current of the motor, in order to increase the auxiliary steering power of the vehicle in response to the increase of the friction due to the contraction or the increase of viscosity at a low temperature, such as in a winter season, thereby improving the convenience of a driver and the product value.03-17-2011
20110066329DRIVING SUPPORT DEVICE - A driving support device includes: an in-vehicle camera for shooting an image toward a driving direction of the vehicle; a display device for displaying the image; a steering wheel angle detector for detecting a steering wheel angle of the vehicle; and a display controller for calculating an expected driving track corresponding to a vehicle width and the steering wheel angle and for controlling the display device to display the expected driving track overlapped on the image. The display controller calculates one steering wheel line, which has a curvature changeable in accordance with the steering wheel angle. The display controller controls the display device to display the one steering wheel line at a center of the expected driving track in a vehicle width direction.03-17-2011
20110106382VEHICULAR STEERING APPARATUS AND CONTROL METHOD THEREOF - An electronic control unit determines that a vehicle is traveling in a straight line if a state in which the steering torque is less than a predetermined steering torque and an amount of change in the steering angle is less than a predetermined steering angle continues for a predetermined period of time when the vehicle speed is greater than a predetermined vehicle speed. Also, if the steering angle of the steering wheel is not 0, while the vehicle is traveling in a straight line, the electronic control unit calculates the steering amount of rear wheels that matches the steering amount of front wheels, using the steering angle of the steering wheel. Then the electronic control unit steers the rear wheels by driving an electric motor until a controlled neutral steering position of the rear wheels that corresponds to the steering amount matches an absolute neutral steering position.05-05-2011
20100094506APPARATUS FOR IMPLEMENTING INTERLOCK OF ELECTRIC POWER STEERING SYSTEM - An apparatus for implementing interlock of an electric power steering system is disclosed. The interlock apparatus can generate the output torque current value for achieving the steering system interlock with current values of two phases and the rectifying positional value for the 1-bit feedback current of one phase out of the 3-phase feedback current values and the rectifying positional value for the 3-bit 3-phase feedback current values. The disclosed interlock apparatus receives the 3-phase feedback current values from the current sensor and the rectifying positional values for the 3-bit 3-phase feedback current values from the rectifying positional sensor, and retrieves therefrom the current values of two phases and the rectifying positional value for the 1-bit feedback current of one phase for use with a substantially cost effective processor in generating the output torque current value.04-15-2010
20120271515TRAILER PATH CURVATURE CONTROL FOR TRAILER BACKUP ASSIST - A vehicle has a trailer backup steering input apparatus, a trailer backup assist control module coupled to the a trailer backup steering input apparatus, and an electric power assist steering system coupled to the trailer backup assist control module and. The trailer backup steering input apparatus is configured for outputting a trailer path curvature signal approximating a desired curvature for a path of travel of a trailer towably coupled to the vehicle. The trailer backup assist control module is configured for determining vehicle steering information as a function of the trailer path curvature signa. The electric power assist steering system is configured for controlling steering of steered wheels of the vehicle as a function of the vehicle steering information.10-25-2012
20100250069PUMP SPEED COMMAND GENERATION ALGORITHM FOR MAGNETORHEOLOGICAL POWER STEERING COUPLING - A method for determining a speed of a power steering pump used in a power steering assembly of a vehicle that has particular application in a vehicle using a magneto-rheological hydraulic power steering (MRHPS) system for improving the fuel efficiency and ride comfort of the vehicle, and for reliable functioning of the power steering system. The method includes determining an angle of rotation of the steering wheel and a rate of change of the angle of rotation of the steering wheel based on the angle of rotation of the steering wheel of the vehicle. The method further includes determining the speed of the vehicle and the speed of the power steering pump based on the angle of rotation of the steering wheel, the rate of change of the angle of rotation of the steering wheel and the speed of the vehicle.09-30-2010
20120221209ACCELERATOR PEDAL ERRONEOUS OPERATION RESPONDING APPARATUS AND STORAGE MEDIUM - An accelerator pedal erroneous operation responding apparatus for a vehicle is provided. The apparatus includes an erroneous operation determining unit which determines whether or not an accelerator pedal of the vehicle is erroneously operated when the accelerator pedal is operated, a deviation determining unit which determines whether or not the vehicle would deviate from a safe area when brake torque is generated for a left braking wheel and a right braking wheel of the vehicle at a current tire rudder angle of a wheel for steering of the vehicle, if the erroneous operation determining unit determines that the accelerator pedal is erroneously operated, and a brake torque generation controlling unit which generates brake torque for the right braking wheel or the left braking wheel, if the deviation determining unit determines that the vehicle would deviate from the safe area.08-30-2012
20120130595VEHICLE DRIVING SUPPORT DEVICE AND VEHICLE DRIVING SUPPORT METHOD - When a lane-width-direction lateral position (X05-24-2012
20120130594METHOD FOR MANAGING FAULTS IN A MAGNETO-RHEOLOGICAL HYDRAULIC POWER STEERING SYSTEM - A system and method for managing faults occurring in a power steering system in a vehicle is disclosed that has particular application for an MRHPS system to provide reliable functioning of the power steering system. The method includes detecting a fault condition in the MRHPS system and selecting a safe mode from a plurality of predetermined safe modes based on the fault condition. The plurality of predetermined safe modes include a normal operation mode, an engine speed follow mode, a manual mode, a fixed duty cycle mode and a voltage control mode. If a fault condition is detected, the method applies the safe mode to manage the fault condition.05-24-2012
20100222968STEERING CONTROL APPARATUS - A steering control apparatus is obtained which can achieve a sophisticated control function and redundancy of a motor output torque control unit with a simple construction. The apparatus includes a motor 09-02-2010
20100332083STEERING SYSTEM FOR REAR WHEELS OF VEHICLE - A steering system for rear wheels of a vehicle without a dead zone in the vicinity of the steering wheel zero. The steering system includes a steering controller and control units that control the rear wheels to be steered in accordance with the steering angle of the steering wheel. The steering system performs a reduction control to provide a smaller steering control amount for the rear wheels in a range where a steering angle becomes smaller than a predetermined value, compared to a steering control amount for the rear wheels in the other ranges of the steering angle. When an angle speed of the steering angle becomes greater than a predetermined value, the steering system performs no reduction control or the reduction control with less reduced steering control amount for the rear wheels even in the range where the steering angle becomes smaller than the predetermined value.12-30-2010
20100332082METHOD AND APPARATUS FOR CONTROLLING STEERING FORCE - Disclosed is a method and an apparatus for controlling steering force, by which every driver can feel a steering sense that the driver wants. In the method, a torque signal is compensated for by using a compensation value input by a driver, and the steering force is controlled using the compensated torque signal, so as to provide every driver with a satisfactory steering sense and a convenience in handling the steering wheel.12-30-2010
20100332081Method for activating a superimposed steering system - Disclosed is a method for actuating a superimposed steering system, a superimposed steering system, a controller, a computer program, and a computer program product. In the method, a steering ratio is produced as a function of the driving speed, with the magnitude of a time delay being adjusted as a function of the driving speed.12-30-2010
20120136539Electronically Controlled Speed Limiting System For Turf Care Machine - An electronically controlled speed limiting system for a turf maintenance machine includes at least one traction motor rotating a wheel. At least one hydraulic pump in fluid communication with the traction motor provides hydraulic fluid to operate the traction motor. At least one actuator in fluid communication with the hydraulic pump varies an output of the hydraulic pump. A controller in communication with the actuator commands the actuator to control the output of the hydraulic pump and thereby an operating speed of the wheel. A brake is activated by the controller if a wheel speed sensor signals the wheel is slip-spinning, to mitigate turf damage. A steering position sensor signal is used by the controller to modify brake activation during machine turns. An inclinometer signal is used by the controller to automatically reduce machine speed on inclined surfaces.05-31-2012
20120173082STEERING APPARATUS - A steering apparatus that by effecting a predetermined relationship between a steering wheel angle and a yaw angular velocity generated for a vehicle makes a direction θ07-05-2012
20120173081SELF-CALIBRATION METHOD FOR ELECTRIC POWER STEERING SYSTEM - The present invention discloses a self-calibration method for an electric power steering system, which can self-calibrate the sensors to a normalized state to prevent from signal distortion, whereby to maintain stable steering sense of the driver and promote robustness and performance of the EPS system. The self-calibration method includes a signal offset compensation tactic and a zero-point signal self-calibration tactic. The present invention determines whether to undertake self-calibration according to judgement tactics, including a sensor power supply judgement tactic, a sensor correctness judgement tactic, and a self-calibration triggering condition. The self-calibration method can increase the correctness of sensors, maintain the original steering-assisting function and promote robustness of the EPS system.07-05-2012
20120173080SYSTEM AND METHOD FOR ASSISTING A VEHICLE OPERATOR TO PARALLEL PARK A VEHICLE - A method and a system for assisting a vehicle operator to parallel park a vehicle. The method and system use only a single proximity sensor to detect a suitable parallel parking space and monitor the position of the vehicle when backing into the parallel parking space. Assistance to parallel park the vehicle may be as little as providing indications or warning to a vehicle operator while the vehicle operator backs the vehicle into the parallel parking space, or may be as much as taking complete control of the vehicle away from the vehicle operator, and autonomously parallel parking the vehicle.07-05-2012
20100057299Steering Angle Sensor System and Method for Measuring A Steering Angle - A steering angle sensor system for measuring a steering angle in a motor vehicle. The steering angle sensor system includes a magnetic encoder which is coupled to at least one magnetic field sensor that senses a variation in the steering angle even when the ignition is switched off, and an electronic memory for storing the steering angle variation. The steering angle sensor system also includes at least one magnetic-field-sensitive element which is coupled to the magnetic encoder for detecting the occurrence of steering movements at an early time in order to at least partially activate the steering angle sensor system and/or another system.03-04-2010
20120316733VEHICLE TURNING CONTROL DEVICE - A vehicle turning control device of the present invention includes: a correcting section that decides a correction amount for correcting a first standard yaw rate in a direction of increase, and calculates a second standard yaw rate from the first standard yaw rate in accordance with this correction amount; a braking force control amount operating section that calculates a yaw rate deviation between the second standard yaw rate and the actual detected yaw rate, and decides a braking force control amount in a direction which cancels out the yaw rate deviation; and a braking control device that controls the braking force based on the braking force control amount. The correcting section is provided with a plurality of correction regulating sections that, when they determine that a vehicle is in a predetermined running state, decrease the correction amount.12-13-2012
20100299028METHOD FOR CONTROLLING AN ELECTRONICALLY ADJUSTABLE STEERING DAMPER FOR A TWO-WHEELED VEHICLE AND APPARATUS IMPLEMENTING IT - The present invention refers to a method for controlling an electronically adjustable steering damper in a two-wheeled vehicle or motor vehicle, and to an apparatus implementing it, in which the steering damper is able to exert a damping torque on a steering assembly (11-25-2010
20100299027Electric power steering apparatus and control method thereof - An electric power steering apparatus includes: a torque sensor including a first sensor element and a second sensor element; a control unit; and a motor. When the first sensor element and the second sensor element are both normal, the first sensor output that is output by the first sensor element and the second sensor output that is output by the second sensor element have a predetermined correlation corresponding to a steering operation performed by a driver. When the first sensor element or the second sensor element is abnormal, the control unit executes weighting with respect to the first sensor output and the second sensor output and calculates a steering torque on the basis of the weighted first sensor output and the weighted second sensor output. The motor generates a steering assist force on the basis of the steering torque.11-25-2010
20120123643DRIVING SUPPORT APPARATUS OF VEHICLE - A driving support apparatus of a vehicle supports driving of the vehicle, the vehicle includes a rudder angle varying device capable of changing a relative relation between a steering angle and a rudder angle. The driving support apparatus includes a following control device for controlling the rudder angle varying device such that the vehicle follows a target driving route; a steering angle specifying device for specifying the steering angle; and a judging device for judging whether or not overriding performed by a driver takes place on the basis of the specified steering angle and a reference steering angle which is the steering angle in making the vehicle follow the target driving route. The following control device stops the vehicle following for the target driving route if it is judged that the overriding takes place.05-17-2012
20100010712METHOD AND DEVICE FOR IMPROVING DRIVING COMFORT IN A STEERING ASSISTANCE SYSTEM - A method for supporting a driver when steering a vehicle, in which a servo torque, as well as an additional actuating torque that may additionally be exerted on the steering system of the vehicle, are produced in order to cause the driver to make a change in the position of the steering wheel. The steering intervention by the additional required actuating torque may be made significantly more comfortable if the gradient of the actuating torque is limited to a maximum value.01-14-2010
20090069980Electric Power Steering System - The electric power steering system detects a steering torque Ts applied to a steering member (not shown), determines a q-axis current i*q and a d-axis current i*d of a motor in dq coordinates, on the basis of the detected steering torque Ts, determines a q-axis voltage V*q and a d-axis voltage V*d, on the basis of a power supply voltage Ed, such that the determined q-axis current i*q and d-axis current i*d flow through the motor, converts the q-axis voltage V*q and the d-axis voltage V*d into three-phase voltages V*u, V*v, and V*w, and applies the three-phase voltages V*u, V*v, and V*w to drive the motor, thereby assisting steering. The electric power steering system includes a limiter unit which limits the q-axis voltage V*q to be smaller than √{square root over ((3n03-12-2009
20120253603VEHICLE STEERING APPARATUS - A vehicle steering apparatus in which a mechanical coupling between a steering member and steered wheels is uncoupled, includes a steering actuator for driving a steered mechanism and a control unit for drive-controlling the steering actuator. The control unit reduces steering-stiffness using a PID control portion for drive-controlling the steering actuator according to a deviation between a target steered angle and a steered-angle detected by the steered angle sensor. A gain setting portion sets gains of the PID control portion to be relatively low when a predetermined condition is satisfied.10-04-2012
20120226417CONTROL APPARATUS FOR VEHICLE - When various automatic steering is performed, a steering reaction transmitted from steered wheels is suppressed without making it interfere with a driver's steering input. A control apparatus (09-06-2012
20120226416SYSTEM AND METHOD FOR PREVENTING STEERING PULL IN VEHICLE - A system for preventing a steering pull in a vehicle includes: a sensor unit configured to generate at least one sensing value for at least one of a steering torque, a steering angle, a vehicle speed and a yaw rate of a vehicle; an ECU configured to determine whether or not the vehicle is in a straightforward driving state, based on a predefined straightforward driving state determination criterion by using the at least one sensing value provided from the sensor unit, determine whether or not a steering pull occurs in the vehicle, based on a predefined steering pull determination criterion when it is determined that the vehicle is in the straightforward driving state, and compensate for the steering torque of the vehicle when it is determined that the steering pull occurs in the vehicle; and a motor driving unit configured to generate steering power under the control of the ECU.09-06-2012
20120232760STEERABLE AGRICULTURAL IMPLEMENT WITH MULTI-POINT HITCH - A steerable agricultural implement configured to be coupled to a tractor by a multi-point hitch system that restrains side-to-side articulation between the tractor and the implement. The agricultural implement includes a steering controller that receives a positional attribute from a steering system of the tractor and controls a degree of pivot of a wheel assembly of the agricultural implement based on the positional attribute of the tractor steering system. The wheel assembly is configured with a steering actuator that is operable to pivot a portion of the wheel assembly without transmitting force beyond the wheel assembly, abutment stops to define maximum degrees of pivot of the portion of the wheel assembly and relieve the steering actuator without transmitting force beyond the wheel assembly, and a quick release free-wheel mechanism to enable a disconnected or “free wheel” operation of the wheel assembly independent of the steering actuator.09-13-2012
20090248250STEERING CONTROL DEVICE FOR VEHICLE - A steering control device for a vehicle includes a yawing value obtaining means for obtaining a yawing value corresponding to a yawing motion of the vehicle, a stabilizing force calculating means for calculating a stabilizing force for assisting an operation of a steering operation member, operated by a driver for steering a steered wheel of the vehicle, in a direction opposite to a direction of the yawing motion of the vehicle, on the basis of the yawing value, and a force applying means for applying the stabilizing force to the steering operation member in the direction opposite to the yawing motion direction, wherein the stabilizing force calculating means includes a counter-steer value calculating means for calculating a counter-steer value indicating a degree of steering the steered wheel in the direction opposite to the yawing motion direction, and wherein the stabilizing force is adjusted based on the counter-steer value.10-01-2009
20110130926INTEGRATED CONTROL SYSTEM FOR STABILITY CONTROL OF YAW, ROLL AND LATERAL MOTION OF A DRIVING VEHICLE USING AN INTEGRATED SENSING SYSTEM WITH PITCH INFORMATION - An integrated stability control system using the signals from an integrated sensing system for an automotive vehicle includes a plurality of sensors sensing the dynamic conditions of the vehicle. The sensors include an IMU sensor cluster, a steering angle sensor, wheel speed sensors, any other sensors required by subsystem controls. The signals used in the integrated stability controls include the sensor signals; the roll and pitch attitudes of the vehicle body with respect to the average road surface; the road surface mu estimation; the desired sideslip angle and desired yaw rate from a four-wheel reference vehicle model; the actual vehicle body sideslip angle projected on the moving road plane; and the global attitudes. The demand yaw moment used to counteract the undesired vehicle lateral motions (under-steer or over-steer or excessive side sliding motion) are computed from the above-mentioned variables. The braking control is a slip control whose target slip ratios at selective wheels or wheel are directly generated from the request brake pressures computed from the demand yaw moment.06-02-2011
20120271516VEHICLE INTEGRATED CONTROL APPARATUS - A vehicle integrated control apparatus includes: an electronic control type right/left wheel differential limiting mechanism; a restraining torque proportional controlling unit calculating a first steering assisting force being proportional to a control amount of a restraining torque of the right and left front wheels and being in a direction according to a rotational speed difference between right and left front wheels; a steering reaction force feedback controlling unit calculating a second steering assisting force corresponding to a steering system reaction force and being in a direction along which the steering system reaction force is canceled; and a switching unit changing a ratio of the first and second steering assisting forces in a steering assisting force to be generated, in accordance with the rotational speed difference.10-25-2012
20120271514ROTATABLE DRIVER INTERFACE FOR TRAILER BACKUP ASSIST - A trailer backup steering input apparatus is coupled to a vehicle. The trailer backup steering input apparatus comprises a rotatable control element (e.g., a knob) and a rotatable control element movement sensing device. The rotatable control element biased to an at-rest position between opposing rotational ranges of motion. The rotatable control element movement sensing device is coupled to the rotatable control element for sensing movement of the rotatable control element. The rotatable control element movement sensing device outputs a signal generated as a function of an amount of rotation of the rotatable control element with respect to the at-rest position, a rate movement of the rotatable control element, and/or a direction of movement of the rotatable control element with respect to the at-rest position.10-25-2012
20120323446METHOD FOR THE OPERATION OF A TRANSVERSE GUIDING DRIVER ASSIST SYSTEM OF A MOTOR VEHICLE, AND MOTOR VEHICLE - In a method for the operation of a transverse guiding driver assist system of a motor vehicle, a road banking information is ascertained as a function of a change in a deviation of a transverse course of a road surface from a horizontal. A future road course is determined from environmental data and/or operating data of a motor vehicle, using the road banking information. A lateral track deviation is determined as a result of a change of a road banking, using the road banking information. At least one transverse guiding parameter is established from the future road course and the road banking information to determine a steering intervention. The lateral track deviation is then corrected by using the transverse guiding parameter.12-20-2012
20110238266DEVICE FOR CONTROLLING A POSITION SENSOR OF THE STEERING WHEEL OF AN AUTOMOBILE - The invention relates to a device (09-29-2011
20080312794POWER STEERING SYSTEM AND METHOD OF INFLUENCING THE DAMPING OF A POWER STEERING SYSTEM - A power steering system is disclosed herein that includes an electronic control unit that determines a set-point value for a damping moment in the power steering system. The system also includes a first sensor connected to the control unit and operable to determine a sign of a steering angle. The sign of the steering angle refers to a clockwise angle from dead center being designated as positive or negative and a counter-clockwise angle from dead center being assigned the other designation. The system also includes a second sensor connected to the control unit and operable to determine the sign of a steering wheel angular velocity. The sign of the steering wheel angular velocity refers to movement of the steering wheel in the clockwise direction being designated as positive or negative and movement in the counter-clockwise direction being assigned the other designation. The control unit can establish the set-point value for the damping moment with a predefined first damping multiplier when the steering angle and the steering wheel angular velocity have the same sign and with a predefined second damping multiplier when the steering angle and the steering wheel angular velocity have different signs.12-18-2008
20110276230Method for operating a power steering mechanism - A method is disclosed for operating a power steering system in which a motor torque is computed by an electronic processor and established by suitable motor actuation, wherein a plausibility check is carried out for the computed motor torque as part of a 3-level design, wherein integration of a part above a motor torque limit curve and decrementation of an integrator with a part below the motor torque limit curve are performed, the target motor torque being limited to a first integration threshold in level 1, and the limitation is monitored in level 2, with an intrinsically safe motor torque limit curve being used as a function of an actual torque.11-10-2011
20110276229ELECTRIC POWER STEERING APPARATUS11-10-2011
20120101687METHOD AND A SYSTEM FOR ASSISTING A DRIVER OF A VEHICLE DURING OPERATION - A method is provided for assisting a driver of a vehicle during operation by providing the driver with a desired steering feel, wherein the vehicle includes a steering arrangement including a manually operated steering device, at least one pair of ground engaging members and a mechanical interconnection between the steering device and the ground engaging members. The method includes detecting a steering angle and determining a desired steering device guiding force based on the detected steering angle, providing the driver with the desired steering feel based on the desired steering device guiding force, and detecting the steering angle in a position at a ground engaging member side of an elastic steering force transmitting element in the steering arrangement.04-26-2012
20120101686ELECTRIC DRIVE STEERING LOCKING APPARATUS - An electric drive steering locking apparatus according to an embodiment of the invention includes an electric motor, a motor driving control unit that allows the motor to perform locking actuation or unlocking actuation, a lower-level microcomputer that outputs an unlocking actuation signal and a locking actuation signal to the motor driving control unit, a first switching unit that electrically connects and disconnects a power supply route from the motor driving control unit to the motor, a checking power supply that applies a predetermined voltage to the electric motor; a switch unit that electrically connects and disconnects the checking power supply and the motor; a first diagnostic unit that outputs a voltage corresponding to an internal resistance of the electric motor; and a motor breakdown determination unit (lower-level microcomputer) that determines a breakdown of the electric motor by the voltage input from the first diagnostic unit.04-26-2012
20100168963CONTROL SYSTEM FOR ELECTRONIC POWER STEERING - There is provided a control system for an electronic power steering. The control system includes: a SAT estimating portion for estimating a self aligning torque (SAT) of a vehicle by inputting an angular velocity and an angular acceleration of a motor, a steering torque, and a current command value; and a motor current correction value calculating portion for deciding a running state of the vehicle based on a SAT estimation value estimated by the SAT estimating portion, a vehicle speed, and a steering angle, and correcting the current command value by calculating a motor current correction value based on the SAT estimation value in accordance with the running state. According to this configuration, an offset torque can be always corrected precisely irrespective of a road surface situation or a driving condition such as a straight line running, and thus a comfortable steering performance can be attained by lessening driver's fatigue.07-01-2010
20130013154ELECTRIC POWER STEERING SYSTEM - A feedforward control section computes, on the basis of a target current absolute value, a voltage limit value of a motor drive circuit, and a rotational speed ωr of a motor, a phase angle of a voltage vector which represents the output voltage of the motor drive circuit by a d-q coordinate system, the phase angle being a phase angle in relation to the d-axis of the d-q coordinate system. A feedback control section computes a phase angle based on a deviation between the target current absolute value and the actual current absolute value. A PWM control signal generation section outputs PWM control signals such that the motor drive circuit outputs a three-phase drive voltage whose electrical angle is advanced by a phase angle. Thus, in the case where a large reverse input is applied to a steering mechanism, the motor is caused to generate a large torque to thereby prevent the steering wheel from being rotated.01-10-2013
20130013153ANALOG/DIGITAL CONVERSION CIRCUIT, SEMICONDUCTOR DEVICE, AND ELECTRIC POWER STEERING CONTROLLING UNIT - The present invention provides a method in which a counting source is provided in data after analog/digital conversion to lessen a load placed when new and old data after the conversion are compared to each other. A log function is prepared in an A/D conversion controlling circuit. The log function latches the output of a counter in a 12-bit digital/analog converter at the timing of outputting a pulse from a comparator to determine data written into a data register group. In the case where a setting item related to log output in an ADCR is set at 1, not only the output of the 12-bit digital/analog converter, but also the output of a timer counter of an MTU is latched as a log.01-10-2013
20120150390Wheel Lean Control - A work vehicle comprises a leanable traction wheel. A control unit of the work vehicle is configured to cause the wheel to move to a wheel-lean angle setpoint.06-14-2012
20110160965METHOD OF PROTECTING MOTOR-DRIVEN POWER STEERING SYSTEM FROM OVERHEAT - According a method of protecting a motor-driven power steering system from overheat, it is possible to prevent a steering motor and an ECU from being broken by overheat by controlling electric current supplied to the steering motor, by calculating an engine stop time from radiation temperature maps stored in a memory and changes in temperature of a temperature sensor when the engine having been stopped restarts without operating a specific protection logic when the engine stops, and calculating temperature of the steering motor and the ECU from the radiation temperature maps and the engine stop time.06-30-2011
20130024072DEVICE FOR DETERMINING THE ABSOLUTE ANGULAR POSITION OF THE STEERING WHEEL OF AN ELECTRIC POWER-ASSISTED STEERING COLUMN OF A MOTOR VEHICLE USING WEIGHTED DYNAMIC PARAMETERS OF THE VEHICLE - A method for determining the absolute angular position of a steering wheel of an electric power-assisted steering column of a motor vehicle, including a means for measuring a dynamic parameter while the vehicle is running and including among others, the steps of periodically determining a multi-turn relative angular position, determining at least one dynamic parameter relating to the running conditions of the vehicle using the means for measuring said parameter, determining an absolute steering-wheel angle calculated according to at least one dynamic parameter, and weighting the calculated value of the absolute steering-wheel angle according to a test of the validity of the calculated value of the absolute steering-wheel angle and the origin of said value, in other words, the measurement means used to determine said at least one dynamic parameter.01-24-2013
20130173120METHOD FOR OPERATING A MECHATRONIC CHASSIS DEVICE OF A MOTOR VEHICLE - A method for operating a mechatronic chassis device of a motor vehicle, wherein the mechatronic chassis device has an arrangement with two servomotors which, when activated, individually change both a toe angle (δ) of a wheel and a camber angle (ε) of the wheel. The servomotors are controlled on the basis of target values in a predetermined manner, wherein if a first servomotor cannot be placed into operation, an emergency program is started and the second servomotor is controlled in a manner different from the predetermined manner such that a lateral force on the wheel is adjusted to a predetermined desired value.07-04-2013
20080249686STEERING APPARATUS, AUTOMOTIVE VEHICLE WITH THE SAME, AND STEERING CONTROL METHOD - An automotive vehicle with a steering apparatus includes a steering wheel, front and rear steerable road wheels, and a steering mechanism for steering the front and rear steerable road wheels. The steering apparatus measures a steering wheel angle of the steering wheel; sets a desired position of a center of rotation about which the vehicle is to rotate for changing a heading angle of the vehicle with respect to a path of the vehicle; sets a desired turning behavior of the vehicle in accordance with the measured steering wheel angle and the desired position of the center of rotation; sets the desired front and rear road wheel steer angles in accordance with the desired turning behavior; and controls the steering mechanism in accordance with the desired front and rear road wheel steer angles.10-09-2008
20080234897Power Supply Controller - A power supply controller controls the output of a DC/DC converter, so that the power output can be used not only by an electrical power steering apparatus, but by other operating/driving controllers as well. The controller may command the DC/DC converter to reduce the voltage of the high-voltage battery to a prescribed voltage or to boost the voltage of the low-voltage battery to a prescribed voltage when appropriate. In addition, the controller may also command the gradual reduction of the power supplied by the DC/DC converter to the power steering apparatus. The gradual reduction in power prevents a sudden change in the steering feel, which improves drivability of the vehicle.09-25-2008
20110264331ELECTRIC POWER STEERING APPARATUS - [Problem] The present invention provides a motor control apparatus that is capable of making the whole system robust not only with respect to motor parameter variations such as the temperature variation and the manufacturing unevenness but also with respect to disturbances and an electric power steering apparatus mounting the motor control apparatus thereon.10-27-2011
20110264330ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus includes an rotating AC machine which generates an auxiliary torque for assisting a steering torque of a steering system; and a controller which performs control so that the allowed electric current amplitude of the rotating AC machine becomes large if a rotational speed of the rotating AC machine is increased. Accordingly, it is possible to release or lessen the limit on the number of repetitions or continuous time of the “stationary steering” or the “end contact”.10-27-2011
20130090812METHOD AND APPARATUS FOR MITIGATING STEERING WHEEL SHAKE - The present invention relates to a technology of mitigating shaking of a steering wheel, and more particularly to a steering wheel shake mitigating method and a steering wheel shake mitigating apparatus by which shaking of the steering wheel is mitigated by generating a steering wheel shake mitigating signal using a torque signal.04-11-2013
20130103264CONTROL APPARATUS FOR VEHICLE - A control apparatus for controlling a vehicle which is provided with a braking/driving force varying device capable of individually changing a braking/driving force acting on each of wheels (FL, FR, RL, RR) with respect to each wheel. The control apparatus includes a target state quantity setting device for setting a target state quantity corresponding to a target motion state of the vehicle; and a target braking/driving force setting device for setting a target braking/driving force, which is a target value of the braking/driving force, such that a state quantity corresponding to the target state quantity and a steering reaction force transmitted to a steering apparatus from the wheel are the set target state quantity and a predetermined target steering reaction force, respectively, on the basis of a relative relation, which is set in advance, between the state quantity and the steering reaction force, and a left-right braking/driving force difference of front wheels and a braking/driving force difference of rear wheels.04-25-2013
20130103263VEHICLE STABILITY CONTROL METHOD AND SYSTEM - A vehicle stability control method is to be performed by a vehicle stability control system of a motor vehicle, and includes the steps of: detecting an actual yaw rate, and obtaining a plurality of detection values by detecting a vehicle speed and a steering wheel angle, and at least one operation status selected from a lateral acceleration status, a load status and a steering wheel angular speed status; obtaining a plurality of intermediate weight values, from which a steering characteristic value is determined, based on the obtained detection values; obtaining a target yaw rate based on the vehicle speed, the steering wheel angle and the steering characteristic value; and controlling steering of road wheels according to difference between the target and actual yaw rates.04-25-2013
20130179039ELECTRIC POWER STEERING APPARATUS - The electric power steering apparatus has a plurality of power systems each including an inverter apparatus provided corresponding to a plurality of wiring sets of a motor thereof. The control section calculates the assist current to be supplied to the motor using a one power system failure-state map when the inverter apparatus or its corresponding wiring set of one of the power systems fails, or using a vehicle speed detection failure-state map when there is a failure in detecting the vehicle speed. The assist current limit value in the one power system failure-state map and the assist current limit value in the vehicle speed detection failure-state map are set to the same value.07-11-2013
20130179038Reverse Drive Assist for Long Wheelbase Dual Axle Trailers - A controller and control method assists a driver with backing up of a vehicle with an attached trailer. The vehicle has a front axle with steerable front wheels controlled by the driver and a rear axle with non-steerable rear wheels. The trailer has a front axle with non-steerable front wheels and a rear axle with steerable rear wheels controlled by a trailer steering controller. The controller receives an operator-controlled vehicle steering angle and a measured hitch angle. The controller determines a trailer steering angle based on the operator-controller vehicle steering angle and the measured hitch angle. The controller continuously controls the trailer (e.g., via a steering angle of the rear wheels) to maintain a trajectory with substantially no lateral slippage.07-11-2013
20130124047METHOD AND SYSTEM FOR ADAPTATION OF A STEERING WHEEL TORQUE OVERLAY OF A LANE KEEPING AID SYSTEM - A method for adaptation of a steering wheel torque overlay of a lane keeping aid system in a vehicle comprises requesting a controller steering wheel torque overlay T05-16-2013
20130124046ARRANGEMENT AND METHOD FOR SAFEGUARDING DRIVER ATTENTIVENESS - An arrangement and a method are described for safeguarding driver attentiveness to the task of steering while operating a vehicle having a lane keeping aid system. The arrangement and method provide for measuring a pinion angle and a torsion bar torque when the lane keeping aid system is applying an overlaying steering torque. Driver applied torque is estimated from the measurements. A hands-off metric is calculated based on a relation between the measurements and the estimate. Hands-off is determined based on a comparison of the metric with a predefined threshold. The arrangement and method further provide for evaluating hands-on between torque interventions by the lane keeping aid system. An action is determined based on the determined hands-off and the evaluated hands-on and the action determined performed.05-16-2013
20130124049ELECTRIC POWER STEERING SYSTEM - An electric power steering system includes steering a torque detector that detects steering torque, and a motor that provides assist torque based on the detected steering torque, wherein for the purpose of estimating, without detecting motor rotation angular information and rotation angular velocity information, the road reaction torque in which the influence of the motor inertia torque is eliminated, a value corresponding to rotation velocity of a steering shaft is calculated based on the steering torque and the assist torque, to calculate road reaction torque based on the value corresponding to the rotation velocity of the steering shaft.05-16-2013
20130124048METHOD AND DEVICE FOR THE COMPENSATION OF STEERING WHEEL ROTARY OSCILLATIONS IN A STEERING SYSTEM - A torque actuator is regulated so as to permit an activation of the torque actuator such that steering wheel rotary oscillations that occur can be compensated. For this purpose, in one embodiment, a torsion bar torque is detected. A compensation torque is determined as a function of the detected torsion bar torque by means of a variable-frequency disturbance variable and state variable calculator. The compensation torque or a signal corresponding to the compensation torque is then taken into consideration during activation of the torque actuator.05-16-2013
20110276231STEER-BY-WIRE STEERING DEVICE - A steer-by-wire steering device, in which when a turning motor fails, a toe angle adjusting motor is converted into a drive source for steering the wheel, is provided. A steering wheel not mechanically coupled with a steering axle; a steering angle sensor; a steering reactive force motor; and a steering control unit are provided therein. In addition to a turning power transmitting mechanism for transmitting power from a turning motor to the steering axle, the use is made of a toe angle adjusting power transmitting mechanism for transmitting power from a toe angle adjusting motor to the steering axle. When the turning motor fails, a switching unit for disconnecting the turning motor from the turning power transmitting mechanism, locking of the toe angle adjusting power transmitting mechanism and turning the wheel using the toe angle adjusting motor is interposed between those transmitting mechanisms.11-10-2011
20130144492PARKING MODE SELECTION APPARATUS AND METHOD - A parking mode selection apparatus selects one parking mode among from plural parking modes including at least a perpendicular parking or a parallel parking. The parking mode selection apparatus includes a steer angle detector that detects a steer angle of a steering wheel, an operation detector that detects, based on the steer angle detected by the steer angle detector, a predetermined operation in which the steering wheel is returned to a neutral position after rotated to a right or a left, and a parking mode selector. The parking mode selector selects, when the predetermined operation is detected by the operation detector, a parking mode that coincides with a steered direction to the right or the left of the steer angle detected by the steer angle detector and is associated with said steer angle.06-06-2013
20100280716Active Steering System - A method for operating an active steering system of a vehicle, in which a ratio between a wheel steer angle and a steering wheel angle specified by the driver can be modified by superimposition of a superimposition angle. The method comprises detecting an offset between a requested motor angle and an actual motor angle, and reducing the offset between the requested motor angle and the actual motor angle using a reduction rate that is selected as a function of at least one input variable specified by the driver.11-04-2010
20080201041CONTROL DEVICE FOR ELECTRIC POWER STEERING APPARATUS - A control device for an electric power steering apparatus includes a control unit which controls a motor giving steering assist force to a steering system according to a current command value computed based on steering toque and vehicle speed in a vector control manner and an advance angle map for compensating for a phase lag occurring in a motor current relative to the current command value. Advance angle compensation is made for the current command value based on the advance angle map.08-21-2008
20130151081SECURING THE ASSISTANCE TORQUE BY MEANS OF AN ESTIMATOR OF THE FORCE ON THE RACK - The invention relates to a method for securing the assistance torque (06-13-2013
20130151079Controllers for and Methods of Controlling Electric Power Assisted Steering Systems - A controller for an electric power assisted steering system includes a steering mechanism and an electric motor that can apply an assistance torque to the steering mechanism. The controller has an input for an input torque signal indicative of the torque applied by a user to the steering mechanism and an output for an assistance torque demand indicative of the assistance torque to be applied to the steering mechanism by the electric motor. The controller includes: a first subcontroller having an input for the input torque signal, an output for a first assistance torque and a process arranged to determine the first assistance torque; a second subcontroller having an input for the input torque signal, an output for a second assistance torque and a processor arranged to determine the second assistance torque; and a blending unit, which provides as an output the assistance torque demand. The blending unit combines the first and second assistance torques in time-varying proportions in order to determine the assistance torque demand.06-13-2013
20130151080POWER ON DEMAND STEERING WHEEL ANGLE SENSOR - A system for powering a steering angle sensor coupled to a steering wheel and a controller comprising a switch, coupled to the sensor and the controller. The switch is activated upon motion of the steering wheel or steering shaft. The switch, when activated, connects a power supply, such as a vehicle battery, to the sensor and the controller so that a new steering angle may be sensed and stored. After a predetermined period of time, the controller sends a signal to deactivate the switch and disconnect the power supply.06-13-2013
20100318264VEHICLE STEERING SYSTEM - A control section (12-16-2010
20130190988CONTROL DEVICE AND CONTROL METHOD FOR VEHICLE - In control of a vehicle that is provided with a steering torque supply device that supplies a steering torque to a steering device coupled to a steered wheel and a steering transmission ratio variation device that changes a steering transmission ratio, the control includes: setting a target state quantity for keeping the vehicle in a target lane; controlling the steering transmission ratio variation device so that a state quantity of the vehicle becomes the set target state quantity; controlling the steering torque supply device so that a steering reaction restriction torque that restricts a steering reaction torque generated in the steering device is supplied with the steering device as the steering torque when the vehicle is kept within the target lane; and correcting the steering reaction restriction torque on the basis of a steering input when the steering input from a driver of the vehicle is produced.07-25-2013
20130190989STABILIZATION OF A VEHICLE COMBINATION - A method and device for stabilizing a vehicle combination consisting of a tractor vehicle and a trailer are provided. In an embodiment, the method includes detecting a steering intervention that acts upon the steered wheels of the tractor vehicle and determining a current steering angle change Δδ(t) caused by the steering intervention and a corresponding current angular steering velocity dδ(t)/dt. A current speed of the tractor vehicle v(t) is determined A braking intervention, by which the wheel brakes of the trailer are activated, is automatically triggered in dependence on the current steering angle change Δδ(t), the current angular steering velocity dδ(t)/dt, and the current speed v(t).07-25-2013
20110320090METHOD FOR DETERMINING THE UNDERSTEERING RATIO OF A VEHICLE PROVIDED WITH ELECTRIC POWER STEERING AND FOR OPTIONALLY CORRECTING THE POWER STEERING - The invention relates to a method for calculating the understeering ratio of automobiles provided with electric power steering (EPS) including an electric assistance motor (12-29-2011
20120029774Method of Detecting External Impacts in Vehicle Steering Systems - The invention relates to a method of detecting external impacts in vehicle steering systems (02-02-2012
20130197761MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE - A motor control device for driving a brushless motor includes a current detecting unit which detects respective phase currents which flow into the brushless motor; a control calculation unit which calculates instruction values showing respective phase voltages to be applied to the brushless motor, and outputs the instruction values as phase voltage instruction values; a phase resistance calculation unit which calculates respective phase resistance values based on detection values of the respective phase currents detected by the current detecting unit, and the instruction values of the respective phase voltages applied to the brushless motor at the time of the detection of the detection values; a correction unit which corrects the phase voltage instruction values according to the respective phase resistance values calculated by the phase resistance calculation unit; and a driving unit which drives the brushless motor based on the phase voltage instruction values after correction by the correction unit.08-01-2013
20130197762METHOD OF STEERING A VEHICLE BY A STEERING ASSISTANCE SYSTEM - In a method of steering a vehicle by a steering assistance system, a steering-wheel angle of a steering wheel is set by a driver. The steering assistance system checks whether the set steering-wheel angle is maintained during a predefined time period and checks whether the driver has taken the hands from the steering wheel. The vehicle is then operated according to the set steering-wheel angle, when the driver maintains the set steering-wheel angle during the predefined time period, or the steering assistance system is switched off, when the driver has released the steering wheel.08-01-2013
20130204494METHOD FOR OPERATING AN ELECTRIC STEERING SYSTEM OF AN INDUSTRIAL TRUCK AND INDUSTRIAL TRUCK PROVIDED FOR THIS PURPOSE - A method is provided for operating an electrical steering system of an industrial truck. An assignment assigns a target value for a rotational position of the steering wheel to each rotational position of the steered wheel. An electrical steering drive motor is provided for the steered wheel such that the detected rotational movement of the steering wheel is converted into rotational movement according to a predetermined transmission factor. An absolute value of a rotational position of the steering wheel and the steered wheel is detected during travel of the industrial truck. If the detected absolute values are related to one another according to the assignment, and if a deviation is determined, a transmission factor is specified that differs from the predetermined transmission factor for the conversion of the detected rotational movement of the steering wheel into the rotational movement of the steered wheel such that the determined deviation is automatically counteracted during the further steering movement.08-08-2013
20120072077ELECTRIC POWER STEERING APPARATUS, MALFUNCTION JUDGING METHOD, AND CURRENT ESTIMATING METHOD - Disclosed is an electric power steering apparatus. The electric power steering apparatus includes: a torque sensor configured to detect a torque applied to a steering wheel; a current detector configured to measure a current flowing through a driving motor; and an electronic control unit configured to estimate a current flowing through the driving motor depending on the detected torque and compare the estimated current with the measured current to judge a malfunction of the torque sensor or the current detector.03-22-2012
20120089301STEERING CONTROL SYSTEM - A tire angle change motor steers a host vehicle according to a tire angle corresponding to the rotation angle of a steering wheel detected by a steering wheel angle sensor. A gear ratio calculating unit of a tire angle control unit changes the amount of steering corresponding to the rotation angle of the steering wheel required for the tire angle change motor to steer the host vehicle, depending on the amount of pushing of the steering wheel detected by the pushing amount sensor. Therefore, it is possible to improve the convenience of a driving operation for steering. A pushing direction reaction force motor changes a reaction force generated against the amount of pushing of the steering wheel by the driver, depending on the speed of the host vehicle detected by a vehicle speed sensor. Therefore, the reaction force makes it possible to prevent the host vehicle from being steered by an unintended operation of the driver in various traveling states of the vehicle.04-12-2012
20130211676CONTROL IN AN ELECTRIC STEERING SYSTEM - An electric power steering system may be controlled by superimposing a driver demand and a driver assistance device demand value to calculate a driver requested support value, in which a virtual driver support value may be calculated based on driver demand and a correction driver support value may be calculated based on a driver assistance device demand value, and the driver requested support value may be calculated as a combination of the virtual correction driver support value and the virtual driver support value.08-15-2013
20130211677METHODS, SYSTEMS AND APPARATUS FOR STEERING WHEEL VIBRATION REDUCTION IN ELECTRIC POWER STEERING SYSTEMS - Methods and systems are provided for suppression of steering wheel vibrations generated by periodic disturbances in a vehicle steering system. An exemplary method reducing steering wheel vibrations caused by periodic disturbances involves determining a gross torque attributable to the periodic disturbances in the steering system, identifying a desired amount of suppression of the vibrations at the steering wheel, determining an offset torque based on the gross torque and the desired amount of suppression, and generating a motor command signal in a manner that is influenced by the offset torque. The motor drive command signal is provided to an electric motor coupled the steering wheel and/or the vehicle tires, and the motor drive command signal influences the torque applied by the motor to assist steering of the vehicle tires by the steering wheel in a manner that attenuates the vibrations communicated to the steering wheel by the desired amount.08-15-2013
20130211678VEHICLE WITH INDEPENDENTLY DRIVEN MULTIPLE AXES, AND CONTROLLER WHICH INDEPENDENTLY DRIVES MULTIPLE AXLES - A vehicle with independently driven multiple axles and a controller which independently drives the multiple axles are disclosed. The controller includes a first controller which determines a target control value including at least one of a mechanical steering angle of each of a plurality of wheels of a vehicle, a target yaw moment of the vehicle, a target longitudinal force of the vehicle, and a target wheel speed of each of the plurality of wheels, according to a driving condition of the vehicle, when the first controller receives an operation input including at least one of a steering input, an acceleration input and a braking input; and a second controller which determines wheel torques of the plurality of wheels, which drive the plurality of wheels independently, based on the target control value, wherein the wheel torques of the plurality of wheels are different from one another.08-15-2013

Patent applications in class Feedback, transfer function or proportional and derivative (P& D) control