Class / Patent application number | Description | Number of patent applications / Date published |
701090000 | Having particular slip threshold, target slip ratio, or target engine torque determining means | 18 |
20080243348 | Systems And Methods For Determining A Parameter Relating A Tire-to-Road Contact And/Or A Relation Between A Wheel And A Vehicle Motion - The present invention refers to systems and to methods for determining at least one parameter relating to a tire-to-road contact and/or a relation between a wheel and a vehicle motion. In particular, the present invention refers to systems and to methods for determining the coefficient of friction between a tire and a road surface. For that purpose, the systems and methods according to the invention use new estimation filtering procedures. | 10-02-2008 |
20080262692 | Road-surface friction-coefficient estimating device - A road-surface friction-coefficient estimating device compares a rack-thrust-force deviation value with a preliminarily set maximum-value-determination threshold value. If the rack-thrust-force deviation value is above the maximum-value-determination threshold value, the device determines that tires are slipping, and sets a front-wheel friction-circle utilization rate in that state as a road-surface friction coefficient. If the rack-thrust-force deviation value is below the maximum-value-determination threshold value, the device refers to a preliminarily set map to determine a restoring speed at which the road-surface friction coefficient is to be restored to 1.0 based on a vehicle speed and a front-wheel slip angle. While restoring the road-surface friction coefficient at the restoring speed, the device calculates and outputs the road-surface friction coefficient. | 10-23-2008 |
20080300765 | Vehicle behavior control device - It is predicted whether a spin amount is tending to diverge and a vehicle is tending to become unstable, or the spin amount is tending to converge and the vehicle is tending to become stable. When the convergent tendency is predicted, a correction to reduce the spin amount is performed. As a result, the performance of a braking force control can be made difficult when the spin amount is tending to converge. Thus, it is possible to prevent an anti-spin control from being performed when there is actually no need to perform the anti-spin control, such as when the vehicle posture is correcting. | 12-04-2008 |
20090192691 | Turf Maintenance Vehicle All-Wheel Drive System - A turf maintenance vehicle all-wheel drive traction control system includes a primary wheel propelling the vehicle. A first motor rotates the primary wheel. A traction control system has a first portion communicating with the first motor to monitor either a first motor current demand or a rotational speed of the primary wheel or the first motor and generates a traction control value. A secondary wheel rotated by a second motor steers the vehicle in a vehicle non-slip condition. A traction control system second portion determines a secondary wheel steering angle value. A speed threshold limit stored in the traction control system compared to the traction control value generates a slippage occurrence message indicative of a primary wheel traction loss event. A second motor drive signal created by comparing the steering angle value and the slippage occurrence message energizes the second motor during the traction loss event. | 07-30-2009 |
20090265072 | DRIVING SUPPORT DEVICE, DRIVING SUPPORT METHOD, AND DRIVING SUPPORT PROGRAM - An end point of a reference speed zone is obtained in which a host vehicle travels at a reference speed by controlling an adjustment amount of a drive source output of the host vehicle, without applying a preset correspondence relation regarding an accelerator pedal position and the adjustment amount of the drive source output of the host vehicle. After the host vehicle passes the end point of the reference speed zone, the adjustment amount is changed by a first degree of change if an actual adjustment amount and an adjustment amount corresponding to application of the correspondence relation with the accelerator pedal position do not coincide. | 10-22-2009 |
20100063703 | AIRCRAFT BRAKING CONTROL - An aircraft braking control system for an aircraft braking system that comprises at least one first side braking unit ( | 03-11-2010 |
20100094521 | ANTI-SKID DEVICE FOR THE DRIVING WHEELS OF A VEHICLE AND METHOD FOR REALISING THE SAME - An anti-skid device for the driving wheels ( | 04-15-2010 |
20100114449 | DEVICE AND METHOD FOR ESTIMATING FRICTIONAL CONDITION OF GROUND CONTACT SURFACE OF WHEEL - Apparatus for estimating a ground contact surface gripping characteristic of a vehicle wheel of a vehicle comprises an input section and an output section. The input section sets an input representing a ratio of a wheel force acting on the vehicle wheel in the ground contact surface, and a wheel slipping degree of the vehicle wheel. The output section determines, from the input, an output representing a grip characteristic parameter indicative of the gripping characteristic of the vehicle wheel. | 05-06-2010 |
20100204895 | Method and Device for Controlling the Traction Slip of the Driven Wheels of a Vehicle With the Engine Torque as a Set Parameter - A method for controlling the traction slip of driven wheels of a vehicle between the wheels and the carriageway, in the case of which a manipulated variable is calculated for a drive engine of the vehicle on the basis of a detection of the instantaneous wheel speed and the calculation of a desired wheel speed, the manipulated variable being formed by an upper limit value for the rotational speed of the drive engine, characterized in that the instantaneous transmission ratio is calculated on the basis of the instantaneous rotational speed of the drive engine and the instantaneous wheel speed, and the upper limit value for the rotational speed of the drive engine is calculated from the desired wheel speed and the instantaneous transmission ratio. | 08-12-2010 |
20100332099 | VEHICLE MOTION CONTROL DEVICE - A vehicle motion control device obtains an actual slip ratio and a physical quantity representing a state of motion of the vehicle in a direction of lateral overturn. The device is in an anti-lateral overturn mode when the physical quantity is larger than or equal to a motion state threshold. The device obtains an increase gradient and determines whether or not the increase gradient is larger than or equal to a predetermined increase gradient threshold, wherein the increase gradient is a ratio of an increase amount of the physical quantity to a decrease amount of the actual slip ratio. The device decreases, when the device is in the anti-lateral overturn mode and the increase gradient is larger than or equal to the increase gradient threshold, a speed of depressurization of a wheel cylinder pressure. | 12-30-2010 |
20110264350 | VEHICLE - Disclosed is a vehicle which makes it possible to control the vehicle traveling state and the vehicle attitude with a high degree of precision, even when the vehicle is traveling quickly, and affords safe and pleasant travel for a range of traveling conditions, by the appropriate correction of the drive torque of a drive wheel in response to the traveling velocity of the vehicle and the position of the center of gravity of the vehicle body. For this purpose, the vehicle comprises a drive wheel rotatably mounted on the vehicle body, and a vehicle control device for controlling the drive torque imparted to the drive wheel to control the attitude of the vehicle. The vehicle control device causes the center of gravity of the vehicle body to move relative to the drive wheel by an amount corresponding to the rotational angular velocity of the drive wheel in the direction of travel of the drive wheel. | 10-27-2011 |
20120221222 | METHOD OF COMPENSATING FOR VEHICLE KINEMATICS IN CONTROLLING INDEPENDENT WHEEL MOTORS - The present invention relates to a method of compensating for vehicle kinematics in a traction control system of an articulated vehicle. The vehicle has an independently-powered wheel. The method includes measuring a speed of the wheel, calculating an instantaneous ground speed of the wheel, and calculating a static ground speed of the wheel. The method further includes calculating a centerline ground speed of the wheel and comparing the centerline ground speed of the wheel to a reference speed. | 08-30-2012 |
20140330501 | BRAKING FORCE CONTROL SYSTEM AND BRAKING FORCE CONTROL METHOD - A braking device and a controller are provided. The braking device individually adjusts braking forces that are respectively generated at wheels of a vehicle. The controller executes braking force distribution control for individually controlling the braking forces at the right and left wheels of the vehicle such that slip conditions of the right and left wheels are equal to each other through control of the braking device. The controller executes the braking force distribution control on the basis of an upper limit of a right and left braking force deviation that is a deviation in braking force between the right and left wheels. | 11-06-2014 |
20140358397 | System and Method for Determining a Vehicle Velocity Parameter - A method is described for estimating longitudinal velocity of a vehicle on a road surface. The method includes obtaining a measured value of vehicle acceleration, which is dependent on longitudinal acceleration of the vehicle and vertical acceleration of the vehicle when a slope of the road surface is non-zero. The method includes determining an initial estimate of the slope. The method includes determining a difference between the initial estimate of the slope and a prior estimate of the slope and, based on the difference, setting a current estimate of the slope to be equal to the initial estimate or the prior estimate. The method includes estimating the longitudinal velocity of the vehicle based on the current estimate of the slope and the measured value of vehicle acceleration. The method includes controlling at least one wheel of the plurality of wheels based on the estimated longitudinal velocity of the vehicle. | 12-04-2014 |
20150360693 | VEHICLE CONTROL DEVICE AND VEHICLE CONTROL METHOD - A vehicle control device includes motors that drive respective tires via drive shafts, a reference rotation speed calculating module that calculates torsional amounts of the drive shafts on the basis of a required torque, and outputs a reference rotation speed for a slip determination, the reference rotation speed being obtained by adding the torsional amounts to rotation speeds of the motors, the rotation speeds corresponding to a vehicle speed, and slip determiners that compare the rotation speeds of the motors with the reference rotation speed to determine whether or not the tires are slipping, and a rotation speed control module that controls the rotation speeds of the motors on the basis of a target rotation speed when it is determined that the tires are slipping. | 12-17-2015 |
20160046186 | METHOD FOR DETERMINING VEHICLE WHEEL SPEED AND SLIP CONDITION PARAMETERS - A method is described for estimating longitudinal velocity of a vehicle on a road surface. The method includes obtaining a measured value of vehicle acceleration, which is dependent on longitudinal acceleration of the vehicle and vertical acceleration of the vehicle when a slope of the road surface is non-zero. The method includes determining an initial estimate of the slope. The method includes determining a difference between the initial estimate of the slope and a prior estimate of the slope and, based on the difference, setting a current estimate of the slope to be equal to the initial estimate or the prior estimate. The method includes estimating the longitudinal velocity of the vehicle based on the current estimate of the slope and the measured value of vehicle acceleration. The method includes controlling at least one wheel of the plurality of wheels based on the estimated longitudinal velocity of the vehicle. | 02-18-2016 |
20160137196 | VEHICLE CONTROL INCLUDING CONTROL OVER A RATE OF TORQUE DECREASE - A method of controlling a vehicle includes determining whether control over a rate of torque decrease is desired in order to improve the vehicle behavior. The rate of torque decrease is controlled to stay within a range of a selected rate of change. A vehicle control system includes a controller configured to determine whether control over a rate of torque decrease is desired. The controller is also configured to control the rate of torque decrease to stay within a range of a selected rate of change. | 05-19-2016 |
20160167662 | TRACTION CONTROL DEVICE | 06-16-2016 |