Entries |
Document | Title | Date |
20080217095 | Limiting Device for Limiting Relay Welding and Motor Driving Apparatus - In a state where an abnormality of a boosting circuit is detected by monitoring a boosted voltage outputted from the boosting circuit, motor relays are turned to an off state when the boosted voltage outputted from the boosting circuit becomes less than a predetermined threshold value due to an action, such as the stopping of a supply of power source voltage to the boosting circuit. Therefore, there can be limited welding of the motor relays caused by an electric arc, which is generated when contacts of the motor relays, are separated. | 09-11-2008 |
20080230302 | Motor-Driven Power Steering Apparatus - The invention provides a motor-driven power steering apparatus provided with a fault diagnosing means diagnosing a fault of a board temperature detecting apparatus on the basis of an armature current Im detected by a motor current detecting means and a board temperature Tb of the control board detected by the board temperature detecting apparatus, and a target current suppressing means suppressing a target current Iq at a time when the fault diagnosing means diagnoses that the board temperature detecting apparatus is out of order | 09-25-2008 |
20080251311 | Superimposed Steering System Comprising a Mechanical Return Level - A superimposed steering system of a vehicle steering system, has an input shaft and an output shaft that are at least partially rotationally mounted on a support system fixed to the vehicle body, a servodrive comprising a rotor arranged in a coaxial manner in relation to one of the shafts and is connected in a rigid manner to a first transmission element and a locking device for selectively coupling the shafts. The first transmission element transmits the rotational speed of the rotor to the rotational speed of the input shaft, and the rotor is rotationally connected to a ferromagnetic or permanently magnetic first contact element. The coupling which is rotationally connected to the shafts can be obtained by a friction connection of a first contact element to a second contact element which is rotationally connected to the support system. The pressure force can be magnetically produced and at least one of both contact elements is arranged in a displaceable manner in the axial direction. | 10-16-2008 |
20080271942 | Power Steering System - A power steering system, which is disposed in the forward part of a vehicle, allows an electric motor to boost the steering torque applied by a driver, and transmits the steering torque to wheels via a steering transmission mechanism. The power steering system includes an impact detection device that detects the impact of an object on a rack housing that houses a rack bar constituting the steering transmission mechanism to detect the impact on the power steering system more accurately. | 11-06-2008 |
20080277189 | ELECTRIC POWER STEERING APPARATUS - It is an object of the present invention to provide an electric power steering apparatus to be small and compact. | 11-13-2008 |
20080314678 | Electric power steering system for vehicle and utility vehicle therewith - An electric power assist device can be compactly disposed with ease in an electric power steering system for a vehicle. The electric power steering system for a vehicle comprises: a steering wheel; a steering column incorporating therein a steering shaft connected to the steering wheel and extending downward to the front; and an electric power assist device for assisting a steering torque of the steering wheel. Here, an input shaft and an output shaft of the electric power assist device are connected to the lower end of the steering shaft and the input shaft of the steering gear device, respectively, via universal joints. | 12-25-2008 |
20090032327 | STEERING ASSISTING SYSTEM FOR VEHICLE - A steering assisting system has a variable transfer ratio steering apparatus and an electric power steering apparatus. The variable transfer ratio steering apparatus has an electric motor for a rotation transfer ratio varying operation. When a predetermined failure occurs in the electric power steering apparatus, the motor is driven to assist the steering operation of the steering wheel. Therefore, without providing the electric power steering apparatus in two sets, the power-assisting torque generation can be continued even when the electric power steering apparatus fails to generate the power-assisting torque. | 02-05-2009 |
20090050398 | VARIABLE EFFORT STEERING ACTUATOR - A magnetic actuator, comprising, an inner ring, an outer ring disposed around the inner ring, a first pair of inner teeth disposed on the inner ring that partially define a gap between the first pair of inner teeth having a first angular dimension, a second pair of inner teeth disposed on the inner ring that partially define a gap between the second pair of inner teeth having a second angular dimension, a first pair of outer teeth disposed on the outer ring that partially define a gap between the first pair of outer teeth having a third angular dimension and a second pair of outer teeth disposed on the outer ring that partially define a gap between the second pair of outer teeth having a fourth angular dimension. | 02-26-2009 |
20090065286 | POWER STEERING SYSTEM - A power steering system for a vehicle is described, wherein a magnetic or electromagnetic actuator, which can be acted on via a controller, is associated with a torsion bar connected to a steering wheel, and by which the torsional stiffness of the system is variable in dependence on the vehicle speed, the steering angle speed and/or the transverse acceleration. In this connection, the electrical power supply of the magnetic or electromagnetic actuator taking place via the controller is interrupted or reduced when a steering angle speed of zero is detected or when a steering angle speed of zero and a vehicle speed of zero are detected. | 03-12-2009 |
20090078491 | STRADDLE TYPE VEHICLE WITH ELECTRIC POWER STEERING APPARATUS - A straddle type vehicle with an electric power steering apparatus includes a vehicle body frame, a bar handle disposed in a front portion of the vehicle body frame, a steering shaft transmitting a turning operation of the bar handle to a pair of right and left front wheels, an electric power steering apparatus mounted in an intermediate portion of the steering shaft for assisting a steering motion of the bar handle, and an engine unit mounted in a center lower portion of the vehicle body frame in rear of the steering shaft. The electric power steering apparatus includes an electric motor arranged in front of the steering shaft. | 03-26-2009 |
20090078492 | STRADDLE TYPE VEHICLE WITH ELECTRIC POWER STEERING APPARATUS - A straddle type vehicle is provided with a body frame of a vehicle, a bar handle provided in a front portion of the vehicle body frame, a steering shaft transmitting a turning operation of the bar handle to a pair of right and left front wheels, and an electric power steering apparatus mounted in an intermediate portion of the steering shaft for assisting a steering motion of the bar handle. The electric power steering apparatus includes, in a state of the vehicle capable of being traveled, an electric power steering main body including an electric motor, a gear unit, an input shaft and an output shaft, an upper steering shaft in which the bar handle is attached to an upper end portion and an upper end of the input shaft is connected to a lower end portion, and a support member supporting the upper steering shaft. | 03-26-2009 |
20090078493 | ELECTRIC POWER STEERING SYSTEM - A main power supply and an auxiliary power supply for supplying power to a motor are provided. AMOS-FET for supplying power from the main power supply and a MOS-FET for supplying power from the main and auxiliary power supplies are provided. When a phenomenon in which a rotor of a motor is rotated by the going-back force of steered wheels occurs, and voltage V | 03-26-2009 |
20090095564 | Apparatus for controlling vehicle - Tire-uniformity components may generate a rotating force on the vehicle, when the vehicle is in a turning movement. The rotating force may spoil or deteriorate a turning performance of the vehicle. The controller controls a motor of an electric power steering system to modulate an assist torque acting on steerable wheels in accordance with the tire-uniformity components. The assist torque is modulated in the same direction as the rotating force. As a result, it is possible to suppress a deterioration of the turning performance of the vehicle. | 04-16-2009 |
20090120711 | WORM GEAR AND ELECTRIC POWER STEERING APPARATUS - A worm gear includes a worm shaft including a thread including a tooth flank that defines a concave edge in a tooth profile of the thread; and a worm wheel including a tooth including a tooth flank that defines a convex edge in a tooth profile of the tooth. The worm wheel meshes with the worm shaft in such a manner that the tooth flank of the worm wheel and the tooth flank of the worm shaft, as working flanks, define therebetween an entrance-side clearance as a clearance where the thread of the worm shaft starts to mesh with the tooth of the worm wheel, and an exit-side clearance as a clearance where the meshing terminates, wherein the exit-side clearance is smaller than the entrance-side clearance. | 05-14-2009 |
20090183940 | Electric Power Steering Apparatus - To provide an electric power steering apparatus in which ground processing for respective sections requiring a ground can be reduced to necessary minimum to improve assemblability. An electric power steering apparatus includes a steering column | 07-23-2009 |
20090194362 | Vehicle steering system - A steering system includes a steering unit which can be configured to convert an operation input to an input shaft into an arbitrary amount of rotation or an arbitrary turning force and output the arbitrary amount of rotation or the arbitrary turning force from an output shaft. A steering handlebar can be configured to be coupled to the input shaft. A support bracket can be configured to be coupled to the output shaft and to support a front wheel of the vehicle. A housing can be configured to accommodate the steering unit. The steering unit can be configured to be mounted to a front end portion of a vehicle body frame of the vehicle integrally therewith by the housing. | 08-06-2009 |
20090200097 | ELECTRONIC STEERING SYSTEM FOR A VEHICLE - An electronic steering system for a vehicle includes a generally freely rotating steering column, a sensor for determining a rotational position of the steering column and a controller for turning tires on the vehicle based upon the rotational position of the steering column. When the vehicle is switched to one of various steer modes the controller electronically resets the rotational position of the steering column to a zero rotational position without physically turning the steering column. A steering brake limits over-rotation of the steering column to prevent the tires on the vehicle from turning beyond a safe distance. The controller electronically resets the rotational position of the steering brake when the steer mode is changed. | 08-13-2009 |
20090218162 | Magnetostrictive torque sensor device, manufacturing method thereof, and vehicle steering apparatus - A magnetostrictive torque sensor device which detects a torque applied to a rotary shaft is provided. The magnetostrictive torque sensor device includes a magnetostrictive portion provided on a surface of the rotary shaft, a coil and a cylindrical back-yoke disposed in outer periphery of the coil. The coil includes a bobbin arranged in outer periphery of the magnetostrictive portion, and a wire wound around the bobbin. A slit is provided on the back-yoke. | 09-03-2009 |
20090272599 | Electric Power Steering Apparatus - To provide an electric power steering apparatus in which it is possible to reduce a size of the entire structure of a control unit while sufficiently showing a heat radiation effect of heat generating members. The electric power steering apparatus includes a steering column | 11-05-2009 |
20090283353 | Lubricant Composition, Speed Reduction Gear Employing the Composition, and Electric Power Steering Apparatus Employing the Speed Reduction Gear - A novel lubricant composition is provided, which is free from an increase in consistency, separation of its lubricant base oil, and leakage of the separated lubricant base oil from a speed reduction gear or the like even if a stress is repeatedly applied to the composition over a long period of time. A speed reduction gear employing the lubricant composition, and an electric power steering apparatus are also provided. The lubricant composition employs at least two types of thickeners including lithium stearate in combination, and has a worked penetration of not less than 355 (at 25° C.). The speed reduction gear | 11-19-2009 |
20100018797 | Steering System and Method for Steering a Vehicle - A steering system disengages a wheel assembly of a vehicle in response to an event while driving. The steering system includes a suspension knuckle, a tie rod, and a puller. The puller includes a connector that removably engages the suspension knuckle and the tie rod to interconnect the suspension knuckle and the tie rod. The puller is operable to move the connector to disconnect the connector from at least one of the suspension knuckle and the tie rod in response to the event. The vehicle is operated along a longitudinal axis while driving and a moment of the vehicle about the longitudinal axis is sensed. If the moment exceeds the threshold, the puller is energized to disconnect the suspension knuckle from the tie rod. | 01-28-2010 |
20100044144 | Circular-Shaped Linear Synchronous Motor, Electromagnetic Suspension and Motor-Driven Steering Device Using the Same - Disclosed are a high-damping and high-thrust cylindrical linear motor and a motor-driven power steering device. A stator includes three-phase stator and a stator core. A slider includes a slider core and permanent magnets. The stator core includes stator-core salient poles, two auxiliary poles and yoke units with a small poles on its surface of the side of the slider, the auxiliary poles being deployed at both ends of the stator-core salient poles, the yoke units configuring a magnetic circuit in cooperation with the stator core and the auxiliary poles. The magnetic circuit is shared among the three phases. Polarities of magnets of the slider become an identical polarity, each of the plurality of permanent magnets being positioned at a position which is opposed to each of the plurality of small poles included in one stator-core salient pole out of the plurality of stator-core salient poles. | 02-25-2010 |
20100051377 | Vehicle steering apparatus - A vehicle steering apparatus, which includes: a steering system connection member connecting a steering wheel and a tire; an electric generator installed in the steering system connection member so as to adjusting a steering force of the steering wheel; and a control unit for controlling a connection/disconnection of both terminals of an armature coil in the electric generator based on a vehicle speed. | 03-04-2010 |
20100133035 | METHOD AND A SYSTEM FOR POWER STEERING - An assisted power steering system and a method for assisting a turning of a steered wheel of a steering system comprising an energy source arranged to assist the turning of the steered wheel, a sensor arrangement arranged to detect direction of the turning, and a control unit arranged to control the energy source based on data from the sensor arrangement, wherein the sensor arrangement comprises at least one first digital sensor arranged to indicate the direction of the turning. | 06-03-2010 |
20100147620 | TORQUE DETECTION DEVICE AND ELECTRIC POWER STEERING APPARATUS USING THE SAME - A torque detection device has a magnetic flux collecting ring, arranged outside an outer periphery of a magnetic circuit forming member which is provided in a rotating body applied with a torque, for collecting a magnetic flux generated by the magnetic circuit forming member; a detector for detecting the torque applied to the rotating body based on a density of the magnetic flux collected by the magnetic flux collecting ring; and a holding ring for holding the magnetic flux collecting ring and the detector and including an attachment part to be attached to a stationary object on an outer periphery on one side in a radial direction. An attachment-preventing convex part for preventing attachment to the stationary object by contacting the stationary object is formed on one end face in an axis line direction of the holding ring. | 06-17-2010 |
20100170741 | MOTOR AND ELECTRIC POWER SUPPLY CONTROL APPARATUS FOR THE MOTOR - In a ring body of a stator, permanent magnets are arranged in alternate inter-pole magnetic path portions located between an even number of stator poles so that magnetic fields pointing in the circumferential direction of the ring body are generated. Coils are wound around alternate inter-pole magnetic path portions where permanent magnets are not provided so that magnetic fields that oppose the magnetic fields generated by the permanent magnets are generated. When electric power is not supplied to the coils, a ring-shaped magnetic circuit is formed by the permanent magnets, and therefore, magnetic flux does not leak to a rotor. When electric power is supplied to the coils, the magnetic flux of the magnetic fields of the permanent magnets and that of the coils combine with each other and flow from the stator poles to rotor poles of the rotor, whereby strong attraction force is obtained. | 07-08-2010 |
20100170742 | MAGNETOSTRICTIVE TORQUE SENSOR, AND PRODUCTION METHOD AND EVALUATION METHOD FOR SAME - A method produces a magnetostrictive torque sensor which detects a steering torque applied to a steering shaft by electrically detecting distortion of magnetostrictive films provided on a surface of the steering shaft. A plating step forms the magnetostrictive film on the surface of the steering shaft, and a heat treatment step heat treats the magnetostrictive film on the steering shaft. During the heat treatment step, hydrogen in the magnetostrictive film is decreased so that a hydrogen desorbing peak around 120° C. disappears when the magnetostrictive film is heated after the heat treatment step. | 07-08-2010 |
20100236859 | LUBRICANT COMPOSITION, SPEED REDUCTION GEAR EMPLOYING THE COMPOSITION AND ELECTRIC POWER STEERING APPARATUS EMPLOYING THE SPEED REDUCTION GEAR - There provided a lubricant composition that without any excess increase of the steering torque of an electric power steering apparatus and without any generation of sliding noise, reduces rattling sound thereby excel in the effect of noise reduction in automobile compartment, and is capable of favorably sustaining the above effect even when continuously used in high-temperature environment for a prolonged period of time; a speed reduction gear using the lubricant composition; and an electric power steering apparatus. The lubricant composition includes buffer particles of a polyurethane resin synthesized by reacting a polycarbonate polyol, cross-linking agent having three or more active hydrogen groups per molecule and a polyisocyanate. The speed reduction gear ( | 09-23-2010 |
20100263959 | EXTERNAL-ROTOR ELECTRIC MOTOR WITH OR WITHOUT A PLANETARY GEAR MECHANISM, MOTOR VEHICLE WITH AN EXTERNAL-ROTOR ELECTRIC MOTOR AND A METHOD FOR OPERATING SUCH A VEHICLE - The electric motor ( | 10-21-2010 |
20100263960 | ELECTRIC POWER STEERING APPARATUS - When a source consisting of series-connected battery | 10-21-2010 |
20100270100 | Electric Power Steering Device - A rack-assist type electric power steering device ( | 10-28-2010 |
20100288576 | VEHICLE STEERING SYSTEM - A configuration is provided which includes a differential gear-type transfer ratio varying mechanism interposed between an input shaft which rotates as a steering wheel is operated and an output shaft which rotates in conjunction with operation of a steering mechanism for permitting a differential operation between both the shafts, the configuration including a transfer ratio control motor for applying a rotational force to the output shaft, a reaction force control motor for applying a rotational force to the input shaft, and a steering control unit for controlling and driving the transfer ratio control motor to obtain a rotation transfer ratio that is predetermined according to operation of the steering wheel and controlling and driving the reaction force control motor to apply a predetermined reaction force to the steering wheel. | 11-18-2010 |
20110000736 | AUXILIARY POWER SUPPLY DEVICE AND ELECTRIC POWER STEERING DEVICE - An auxiliary power supply device that can always supply stable auxiliary power at the time of using an auxiliary power source and an electric power steering device employing the auxiliary power supply device are provided. In the auxiliary power supply device | 01-06-2011 |
20110005855 | MOTOR CONTROLLER AND ELECTRIC POWER STEERING SYSTEM - A motor controller and an electric power steering system including the motor controller are provided. The motor controller has a microcomputer. When the on time of one of the lower potential-side FETs corresponding to the respective phases in a drive circuit becomes shorter than the detection time for detecting the phase current value, the microcomputer estimates the phase current value of the electric current undetectable phase based on the phase current values of the two phases other than the electric current undetectable phase corresponding to the relevant FET (blind estimation). When electric current detection is performed in the blind estimation, motor control signals are output, by which the switching state of the switching arm of the electric current undetectable phase is maintained and the power loss caused by the switching operation of the FETs in the two phases other than the electric current undetectable phase is compensated for. | 01-13-2011 |
20110120797 | VEHICLE STEERING APPARATUS - A vehicle steering apparatus includes an actuator that generates a steering force, and a first speed reduction mechanism connected to the actuator. To the first speed reduction mechanism, a second speed reduction mechanism is connected. To the second speed reduction mechanism, a steering mechanism is connected. A sub-assembly including the actuator and the first speed reduction mechanism is configured. | 05-26-2011 |
20110203869 | ELECTRIC POWER STEERING APPARATUS - In an electric power steering apparatus including capacitor for smoothing out the voltage of battery and relay including a relay contact disposed at a place upstream of the capacitor, a path is provided for directly conducting a terminal voltage of the capacitor from a downstream side of the relay contact to a system power supply supply that generates a source voltage for a control system including controller and the like, so that the system power supply and the control system that is supplied therefrom with electric power for control purpose are utilized as a discharge circuit. Thus is obtained a simplified configuration of circuit responsible for discharging the capacitor. | 08-25-2011 |
20110247891 | STEERING SYSTEM HAVING NOISE-REDUCING COMPONENTS MADE OF COMPOSITE MATERIAL - The invention relates to a steering system with a steering wheel, an upper steering shaft, a lower steering shaft and a steering gear, having a servo drive or superposition drive, and wherein at least one housing part is manufactured from sheet metal implemented as a composite material, wherein the composite material has a first metal layer and a second metal layer, between which an insulating layer is arranged made of a viscoelastic material or an elastomer. | 10-13-2011 |
20110278089 | Steering gear - Disclosed is a steering gear for a power steering system of a vehicle, comprising a component that is mounted axially displaceably in a housing of the steering gear, a tie rod fixed in an articulated manner on at least one axial end of the component by way of a joint, wherein a rotational center of the joint is disposed on a radially directed adapter part laterally offset with respect to a central longitudinal axis of the axially displaceable component, and the adapter part is fixed to the axially displaceable component by way of a shaft-hub connection, which is fastened on the axial end of the axially displaceable component using a nut on an external thread so as to provide a steering gear that has a high-strength, play-free connection between the axially displaceable component thereof and the adapter part, and which is easy to produce, the shaft-hub connection being formed by a play-free, conical serrated connection. | 11-17-2011 |
20110284312 | ELECTRIC POWER STEERING DEVICE - An electric power steering device is provided with a construction that can suppress the generation of stick slip between the outer peripheral face of a rotation shaft ( | 11-24-2011 |
20110290580 | Motor drive apparatus and electric power steering system using the same - A motor drive apparatus includes a control circuit, which determines that a wire connecting a battery to a first power supply relay and a second power supply relay is broken, and not failure of the power supply relays, if power is not supplied to a motor from the power supply relays when the power supply relays are controlled to turn on. The location of failure can thus be specified accurately. It is only necessary in this case to replace the wire. The motor drive apparatus need not be disassembled or investigated in detail. Man-power for specifying the failure location can be reduced. | 12-01-2011 |
20110297474 | STATOR, BUS BAR UNIT, MOTOR, AND POWER STEERING DEVICE - A stator includes a core and a coil group. The core includes a ring portion, and a teeth portion preferably including twelve teeth portions projecting from an inside of the ring portion toward a center thereof. The coil group preferably includes twelve coils arranged in each of the teeth portions. The core is defined by coupling twelve cores which respectively include a teeth portion. The coil group preferably includes six coil pairs each including two coils joined to each other by a single conductive line. When the core is divided into a phase region and a neutral region equally along the axial direction, a first group of coils in each of the six coil pairs are arranged in the phase region, and the other coils are arranged in the neutral region. | 12-08-2011 |
20110303478 | FACTORY STEERING RACK CENTERING USING ELECTRIC POWER STEERING SYSTEM - A method is provided for centering a steering rack in an automotive vehicle, particularly a vehicle that includes an electric power steering (EPS) system. The centering method includes locating a center by using an electric motor of the EPS system. The method includes temporarily locking the steering rack in place and subsequently installing a steering wheel to a steering column after the locating step. The method further includes operatively communicating with an on-board processor or ECU of the automotive vehicle and running a program to determine or locate the center of the rack. The method may also include detecting the first and second ends of the rack when at least one of a velocity of the electric motor reaches zero, a current of the electric motor reaches a preselected level, and steering angle of the electric motor stabilizes. | 12-15-2011 |
20110315469 | Motor drive apparatus and electric power steering system using the same - When an inverter or a coil set of one system in a motor drive apparatus having two systems fails, a power supply relay of a failing system interrupts power supply and a control circuit gradually reduces a current supply limitation value of a normal system to zero. Then when a steering torque becomes greater than a predetermined threshold value, the control circuit increases the current supply limitation value by a predetermined amount. By reducing the current supply limitation value to zero once and then gradually increasing the current supply limitation value to generate steering assist torque, a driver will be caused to sense changes in the steering torque and surely notice occurrence of failure. | 12-29-2011 |
20120018241 | MAGNETOSTRICTIVE TORQUE SENSOR AND ELECTRICAL POWER STEERING DEVICE - Disclosed are a magnetostrictive torque sensor and an electrical power steering device, wherein a first torque sensor has: one magnetostrictive film provided on a steering shaft; a first coil and a second coil that detect changes in the magnetic characteristics of the magnetostrictive film; and a first housing that contains, at least, the steering shaft, the magnetostrictive film, the first coil, and the second coil. The first housing has a resin part, a cylindrical part made of a metal that is soft magnetic, and a flange part made of a metal that is soft magnetic. The resin part, the cylindrical part, and the flange part are formed as a unit. | 01-26-2012 |
20120024615 | METHOD FOR OPERATING A STEERING SYSTEM - A method for operating a steering system and such a steering system are presented. The steering system includes a steering wheel which acts on a steering rack via a steering pinion of a steering column, wherein a steering torque is transmitted to the steering rack by means of the steering wheel. Furthermore, a steering assistance unit is provided, by means of which a steering assistance torque can be applied to the steering rack A control circuit with which the steering assistance torque is regulated, is used, wherein the control circuit takes into account the mass inertia of the steering column. | 02-02-2012 |
20120043155 | SYNCHRONOUS MACHINE - The invention relates to an electric machine ( | 02-23-2012 |
20120061166 | ALL TERRAIN VEHICLE - An all terrain vehicle includes a vehicle body frame, a steering shaft rotatably supported by the vehicle body frame, a power steering device including an electric motor, the power steering device being configured to exert an auxiliary rotational force to the steering shaft by a driving power generated in the electric motor, a radiator disposed in front of the electric motor, and a shield member mounted to the vehicle body frame and positioned between the radiator and the electric motor to cover the electric motor from a forward direction. | 03-15-2012 |
20120073897 | POWER STEERING APPARATUS - A power steering apparatus including a steering shaft, a sensor coil disposed on an outer circumferential side of the steering shaft and detecting a change in impedance value to determine an amount of relative rotation of an input shaft and an output shaft of the steering shaft, a steering housing including a first housing and a second housing, a sensor substrate disposed on the first housing, a neutral point regulating circuit on the sensor substrate which includes a resistor connected to the sensor coil and variably regulates a resistance value of the resistor so as to regulate the impedance value at a neutral point at which the amount of relative rotation of the input shaft and the output shaft is zero, and an electric motor which is driven and controlled in accordance with an output signal of the sensor coil regulated by the neutral point regulating circuit. | 03-29-2012 |
20120080257 | RACK DRIVEN ELECTRIC POWER STEERING APPARATUS - Disclosed is a rack driven electric power steering apparatus in which balls can be introduced in a state where end caps are assembled within a ball nut, impact noise and friction noise can be reduced when the balls circulate, and a separate assembling device for injection of the balls is not required, making it possible to shorten a manufacturing and assembling process. | 04-05-2012 |
20120118662 | MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING SYSTEM - A motor control device with which both high-accuracy current detection and improvement in voltage utilization factor are achieved is provided. When an ON time of any one of low potential side switching elements corresponding to respective phases in a driving circuit is shorter than a detection time of a current value, a microcomputer estimates a phase current value of a current undetectable phase based on current values of two phases other than the current undetectable phase corresponding to the said FET. Then, at the time of current detection using the blind correction, during current detection for two phases, other than the current undetectable phase, based on which the blind correction is performed, motor control signals for maintaining switching states of a switching arm corresponding to the current undetectable phase are output. | 05-17-2012 |
20120125708 | STEERING APPARATUS - Low cost construction of a steering apparatus is provided that is capable of protecting an operator's knees | 05-24-2012 |
20120160595 | ELECTRIC POWER STEERING SYSTEM AND VEHICLE STEERING SYSTEM - Provided are an electric power steering system and a vehicle steering system each including rack-and-pinion mechanisms ( | 06-28-2012 |
20120160596 | ELECTRIC MOTOR ASSEMBLY AND ELECTRIC POWER STEERING DEVICE - An electric power steering device includes an electric motor assembly. The assembly includes a case, a motor, and a control unit. The control unit controls the motor based on at least a torque signal indicative of a steering torque applied to a steering wheel by an operator. A power connector is disposed to protrude toward radial outside from the case. A signal connector is disposed to protrude toward radial outside from the case. A torque signal connector is disposed on a case portion close to the control unit to protrude toward radial outside from the case. The torque signal connector and the power connector are disposed apart from each other by a predetermined distance, and the torque signal connector has a connecting portion, which is prepared to be connected with the torque signal line, formed toward the motor along the axial direction of the case. | 06-28-2012 |
20120234623 | IMPACT ABSORBING STEERING APPARATUS - Construction is achieved wherein the rear section of a steering column | 09-20-2012 |
20120234624 | ELECTRIC POWER STEERING APPARATUS - In an electric power steering apparatus, a switch means ( | 09-20-2012 |
20120261208 | DEVICE FOR ACTIVE STEERING OF A VEHICLE AND A STEERING MECHANISM WITH SUCH A DEVICE - A device for active steering of a truck provided with a power steering arrangement ( | 10-18-2012 |
20120273290 | MOTOR CONTROL DEVICE - Provided is a motor control device including a main calculation unit ( | 11-01-2012 |
20120273291 | IMPACT ABSORBING STEERING APPARATUS - Construction is achieved wherein a steering wheel can displace smoothly in the forward direction during a secondary collision, even when an electric motor | 11-01-2012 |
20120298439 | RACK DRIVING-TYPE POWER ASSISTED STEERING APPARATUS - Disclosed is a rack driving-type power assisted steering apparatus having effects of preventing a lock screw from being loosened due to vibration in axial and radial directions generated by a rack bar, a ball nut, and a rack housing when the rack bar slides while the ball nut rotates, reducing vibration and noise of the ball nut and the rack bar transferred through a bearing, and providing a driver with steering comfortability. | 11-29-2012 |
20120312626 | ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus includes a steering column that is swung around a tilting spindle during tilt adjustment, a fixing bracket that supports the steering column through the tilting spindle, and an electric motor that is supported by the steering column and used as a steering auxiliary. The fixing bracket includes a pair of side plates facing each other with the steering shaft therebetween in a vehicle width direction and a connection member through which the pair of side plates are connected together. Either one of the pair of side plates is provided with a first restraining portion that restrains the steering column from rotating in a first rotation direction around the tilting spindle. The remaining one of the pair of side plates is provided with a second restraining portion that restrains the steering column from rotating in a second rotation direction opposite to the first rotation direction. | 12-13-2012 |
20130068553 | ELECTRICAL POWER-ASSISTED STEERING - The invention relates to a steering system for a motor vehicle with electrical power assistance comprising: a steering-spindle bearing unit, in which the steering shaft is mounted rotatably and is guided in a slide, which can be connected to the vehicle body, wherein the steering-spindle bearing unit is adjustable at least in its inclination, an electric motor, which is coupled rotatably via reduction gearing to a steering spindle, wherein the reduction gearing is enclosed and mounted in a housing, wherein the housing has means for forming a swivelling axis, about which the steering-spindle bearing unit is adjustable in its inclination, wherein the steering system further comprises a retaining clamp for fastening the steering system to the motor vehicle, wherein the retaining clamp has a guideway that interacts with a counterstay arranged on the slide, wherein the slide is movable along the guideway after it overcomes a presettable releasing force, and in the case of displacement of the slide along the guideway, the swivelling axis is moved upwards relative to the retaining clamp. | 03-21-2013 |
20130118827 | ELECTRIC POWER STEERING SYSTEM - An electric power steering system includes elastic members arranged at respective axial ends of a first bearing by which a motor shaft that serves as a hollow shaft is rotatably supported and which elastically support the first bearing relative to a rack housing in the axial direction; and a support member disposed on the outer periphery of the first bearing to support the first bearing with displacement of the first bearing in the radial direction restricted. The motor shaft is disposed so as to move relative to the rack housing in the axial direction as the first bearing slides relative to the support member while elastically deforming the elastic members and a second bearing moves in the axial direction. | 05-16-2013 |
20130153327 | STEERING SYSTEM IN A VEHICLE - A steering system in a vehicle comprises an electrical servo motor for generating a supporting servo torque, wherein the motor shaft of the servo motor is coupled to a motion transmitting component of the steering system. A water protection shield enclosing the motor shaft is disposed between the motor housing of the servo motor and the motion-transmitting component. | 06-20-2013 |
20130161114 | ELECTRIC POWER STEERING SYSTEM - An electric power steering system includes: an annular elastic member that is made of resin, that is arranged between an inner end face of a housing and an outer ring of a bearing that supports a cylindrical member that rotates coaxially with a rack shaft, and that supports the cylindrical member such that the cylindrical member is movable in the axial direction with respect to the housing; and a supporting member that restricts axial movement of the cylindrical member within a predetermined range, and that restricts radially inward movement of the elastic member. | 06-27-2013 |
20130199866 | STEERING APPARATUS FOR AN AUTOMOBILE - Construction is achieved wherein the front-end section of an outer column | 08-08-2013 |
20130220726 | MOTOR DRIVE APPARATUS - A power transducer failure detection device detects a failure on a power transducer, making a power transducer control device stop driving the power transducer. A first switching control device turns off a first power supply relay of a power supply source switching device and turns on a second power supply relay of the power supply source switching device. While the power transducer stops driving, a motor may rotate due to an external force to generate a regenerative voltage. The regenerative voltage is then regenerated in a battery through a route from the power transducer via the second power supply relay being turned on and a parasitic diode of the first power supply relay. This can protect elements such as switching elements and a smoothing capacitor of the power transducer against a regenerative voltage and prevent the elements from being destroyed or reducing the useful life due to overvoltage. | 08-29-2013 |
20130220727 | ELECTRIC POWER STEERING - A steering force assisting device that includes an electric motor and includes independent two sets of motor driving circuit and control unit, and the electric motor includes coils having the same polarity and different motor characteristics, the coils being wound around each of teeth of a stator of the electric motor. The motor characteristics are a high speed/low torque characteristic and a low speed/high torque characteristic, and may be selected on the basis of the running condition of a vehicle. | 08-29-2013 |
20130248277 | ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus includes an electric motor, a drive torque transmission mechanism for converting a rotation of the electric motor to a linear movement and transmitting the linear movement to vehicle wheels, first and second circuit boards mounting electronic components to process a motor control command and drive the electric motor based on the motor control command, a metal control housing accommodating therein the first and second circuit boards and coupled at an outer surface thereof to the drive torque transmission mechanism, a heat transfer part located inside the control housing so as to receive heat from the respective circuit boards and a heat guide part extending from the outer surface of the control housing to the inside of the heat transfer member so as to guide the heat transferred to the heat transfer part in a direction toward the drive torque transmission mechanism. | 09-26-2013 |
20130264140 | ON-VEHICLE ROTARY ELECTRIC MACHINE AND ELECTRIC POWER STEERING SYSTEM - An electrical motor includes: a cylindrical stator core arranged so as to surround a periphery of a rotor via a space, and having a plurality of teeth formed in an inner periphery thereof; a bobbin installed in each of the plurality of teeth; a coil wound around each of the bobbins installed in the teeth; a bottomed cylindrical chassis having a bottom faced with one of end portions in the axial direction of the stator core, and holding an outer periphery of the stator core; and a busbar mold provided with a busbar terminal. An engaging hole is formed at least in either the bottom or the busbar mold at a position facing the bobbin, and an engaging projection that engages with the engaging hole is formed in an opposing part that faces the engaging hole in the bobbin. | 10-10-2013 |
20130277137 | VEHICLE HAVING COMPACT CONFIGURATION - A strut suspension is disposed on a vehicle front side of a rotation center of a front wheel. A rack and pinion mechanism is disposed on a vehicle front side of the strut suspension. Since the strut suspension and the rack and pinion mechanism are disposed on the vehicle front side of the rotation center of the front wheel, a foot space can be moved forward to a position where the foot space overlaps the front wheel. A vehicle cabin space can be thereby increased. | 10-24-2013 |
20130277138 | MOTOR DRIVE APPARATUS - A motor drive apparatus includes a back EMF detection element and a protection control circuit. When a voltage detected by the back EMF detection element exceeds a threshold voltage of a Zener diode, a voltage signal is applied to a sensing gate through a detection signal line to sequentially turn on switching element of the low-side arm. A current caused by the back EMF applied to a drive circuit flows to the ground through the switching element of the low-side arm in an on-state. Thus a braking torque is applied to a motor, which is driven to rotate by an external force, and hence the back EMF is reduced. Switching elements in the drive circuit are thus protected from the excessive voltage. | 10-24-2013 |
20140054102 | CAGE FOR A ROLLING BEARING, NOTABLY FOR A MOTOR VEHICLE ELECTRIC POWER STEERING BEARING - The rolling bearing cage is intended to provide the circumferential spacing of a row of rolling elements and comprises first pockets | 02-27-2014 |
20140116798 | CONTROL DEVICE AND VEHICLE STEERING SYSTEM INCLUDING CONTROL DEVICE - A circuit board includes control circuit patterns and first drive circuit patterns. A base maintains the circuit board in a state in which the base is opposed to a portion of the circuit board, in which the control circuit patterns are formed, across a space that allows control circuit elements to be mounted at the circuit board. A line module includes second drive circuit patterns electrically connected to the first drive circuit patterns so as to constitute a part of lines of a drive circuit, and is sandwiched between a portion of the circuit board, in which the first drive circuit patterns are formed, and the base. | 05-01-2014 |
20140151146 | MOLD MODULE UTILIZED AS POWER UNIT OF ELECTRIC POWER STEERING APPARATUS AND ELECTRIC POWER STEERING APPARATUS - There is provided a mold module and an electric power steering apparatus in which the temperature distribution in electronic components such as semiconductor chips utilized in an electronic relay and an inverter circuit unit is equalized and hence the heat radiation performance can be improved. In a mold module according to the present invention, a plurality of terminals for forming wiring leads and a plurality of electronic components mounted on the respective terminals are molded with a molding resin; at least part of the plurality of terminals are exposed at the rear side of the molding resin; an electric power steering apparatus according to the present invention utilizes the mold module. | 06-05-2014 |
20140158454 | SUPPORT BRACKET, MANUFACTURING METHOD THEREOF, AND ELECTRIC POWER-STEERING APPARATUS - A support bracket structure is realized, in which the support bracket is made using a metal plate and sufficient strength and rigidity thereof can be maintained, and the production costs thereof can be kept sufficiently low by improving the yield of material. A support bracket | 06-12-2014 |
20140246266 | STEERING COLUMN SUPPORT APPARATUS - A steering column support apparatus for an electric power-steering apparatus with a tilt mechanism is achieved that is capable of sufficiently maintaining support rigidity of a tilt pivot shaft | 09-04-2014 |
20140291062 | ELECTRIC POWER STEERING SYSTEM - A drainage device of an electric power steering system has a drain case and a drain valve. The drain case has a groove portion formed in a peripheral edge portion of a case inlet. The drain valve has a main body, and a flange disposed so as to face the case inlet. The flange has a bulged portion bulged toward the case inlet, and an annular seal portion. When the seal portion is brought into tight contact with the peripheral edge portion of the case inlet, the drainage device is placed in a valve closed state to form an annular space between the groove portion and the seal portion. When the seal portion is elastically deformed to form a gap between the seal portion and the peripheral edge portion of the case inlet, the drainage device is placed in a valve open state. | 10-02-2014 |
20140326530 | ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus ( | 11-06-2014 |
20140367190 | Steering Mechanism - A steering mechanism comprising a first swing bar ( | 12-18-2014 |
20150008066 | ELECTRIC POWER STEERING SYSTEM - An electric power steering system includes: an assist motor that generate assist force for assisting steering of a steering member; a motor drive circuit that controls driving of the assist motor; a capacitor that is electrically connected to a main power supply that supplies electric power to the assist motor, the motor drive circuit, and electrical components; and a controller that controls charging and discharging of the capacitor. The controller discharges electricity to the electrical components when an amount of electric charge remaining in the auxiliary power supply is equal to or greater than a first threshold value in an engine start-up period in a vehicle. | 01-08-2015 |
20150034410 | ELECTRIC POWER STEERING DEVICE - An electric power steering device includes a steering shaft that is coupled to the steering wheel, an output shaft that is coupled to the steering shaft via a torsion bar, a torque sensor that detects a steering torque that acts on the torsion bar, a sensor case to which a magnetic material, which is a component of the torque sensor, is fixed, an upper column tube that rotatably supports the steering shaft, and a lower column tube that is movable relative to the upper column tube, wherein the lower column tube and the sensor case are configured as an integrated part made of a resin material. | 02-05-2015 |
20150041240 | STEERING APPARATUS - A steering apparatus has a pinion shaft that transmits rotation of a steering wheel to a rack shaft, a bearing that is internally fitted to the housing, rotatably supports one end of the pinion shaft on the housing, and bears a radial load and a thrust load acting on the pinion shaft, and a retaining ring that is internally fitted to an annular groove provided on the inner circumferential surface of the housing and has a C-shaped part and an opening defined by two opposed ends of the C-shaped part, the C-shaped part being in contact with an end face of an outer ring of the bearing to thereby fix the outer ring of the bearing to the housing. The retaining ring is internally fitted to the annular groove in such a way that the opening faces toward the rack teeth as seen from an axial direction of the pinion shaft. | 02-12-2015 |
20150075898 | POWER CONVERSION APPARATUS AND ELECTRIC POWER STEERING APPARATUS HAVING THE SAME - A power conversion apparatus includes: an inverter unit having high and low potential-side switching elements corresponding to each phase of a winding of a rotating electrical machine; a current detecting unit; a current obtaining unit obtaining a current detection value with a fixed interval sampling timing; and a control unit controlling the switching elements based on a PWM reference signal and a duty instruction value. The control unit includes: a phase current computing device; a voltage instruction value computing device; and a duty computing device. The phase current computing device computes a correction current based on positive and negative side corrected current detection values. The positive-side corrected current detection value is obtained when a duty is adjusted to a positive side, and the negative-side corrected current detection value is obtained when the duty is adjusted to a negative side. | 03-19-2015 |
20150298724 | ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus has a first rolling bearing and a second rolling bearing rotatably supporting an output shaft. The first rolling bearing is provided between an inner peripheral surface of a through-hole of a gear housing and an outer peripheral surface of the output shaft. The second rolling bearing is provided between an inner peripheral surface of an intermediate plate and the outer peripheral surface of the output shaft. The intermediate plate has an outer peripheral portion supported and fixed in an opening portion of the gear housing. | 10-22-2015 |
20150307123 | Housing Assembly for an Electric Motor - A housing assembly has a housing having an open end. A plurality of magnets are fixed to an inner surface of the housing. A magnet holder supports the magnets against movement in the axial and circumferential directions. A cover is mounted in the magnet holder for fixing the magnets in the radial direction. The cover is resiliently deformed when assembled to the magnet holder and magnets, and abuts and resiliently urges the magnets towards the inner surface of the housing. | 10-29-2015 |
20150357892 | PERMANENT MAGNET TYPE MOTOR - To provide a permanent magnet type motor having reduced torque ripple, in which torque ripples for electric angle sixth order and twelfth order are both reduced with a small skew angle. | 12-10-2015 |
20150375775 | ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus according to the present invention is characterized in that a motor frame ( | 12-31-2015 |
20160001812 | LOAD CONTROL DEVICE, ELECTRIC POWER STEERING DEVICE, AND METHOD FOR CONTROLLING LOAD CONTROL DEVICE - A load control device includes a load control means that drives a load, a current detection resistor, a differential amplifier and a current calculation means. The load control means can switch between a standby state a drive state, a state in which a first of the switching elements is turned ON and a second of the switching elements is turned OFF and a state in which the first of the switching elements is turned OFF and the second of the switching elements is turned ON being alternately repeated in the standby state, in which both of the switching elements are turned ON in the drive state. The current calculation means calculates a current that flows to the current detection resistor on the basis of a value output from the differential amplifier in the drive state and an offset value output from the differential amplifier in the standby state. | 01-07-2016 |
20160031476 | ELECTRIC POWER STEERING DEVICE - An electric power steering device includes a ferrite core mounted on a wire harness connected to an electric motor and a bracket configured to fix the ferrite core to a vehicle. | 02-04-2016 |
20160033001 | ELECTRIC POWER STEERING ISOLATOR - Electric power steering systems and a method for controlling an electric power steering system are provided. The method, for example, includes, but is not limited to, determining, by a controller, a speed of a vehicle based upon data from a sensor, and adjusting, by the controller, a stiffness of an isolator in an electric power steering system via at least one piezoelectric device embedded in the isolator based upon the determined speed of the vehicle. | 02-04-2016 |
20160036303 | DRIVE DEVICE AND ELECTRIC POWER STEERING DEVICE INCLUDING THE DRIVE DEVICE - A drive device that includes a motor having a rotor disposed relative to a stator, a cover having a one-end-closed cylinder shape and positioned on one axial end side of the motor, and a substrate on the inside of the cover perpendicular to a motor shaft having electronic components implemented on the substrate. The drive device also includes a connector positioned on a motor side of the substrate with an opening that is connectable to an external terminal. The opening of the connector faces outward relative to the motor shaft. The drive device further includes a heat sink having a frame end part and a heat receiving part formed in one body. The drive device increases heat capacity of the heat sink without increasing its height. | 02-04-2016 |
20160036305 | DRIVER UNIT AND ELECTRIC POWER STEERING DEVICE INCLUDING THE DRIVER UNIT - A driver unit has a rotating electric machine and a frame member that is disposed on one axial end of the rotating electric machine. A substrate is fixed onto one surface of the frame member which faces away from the rotating electric machine. Switching elements constituting inverters for switching power supply to winding groups are mounted on a first surface for enabling heat dissipation toward the frame member. An Integrated Circuit (IC) is mounted on the first surface for enabling heat dissipation toward the frame member. An electronic component is mounted on a second surface at an overlapping position that at least partially overlaps a mounting position of the IC. | 02-04-2016 |
20160059838 | VEHICLE ELECTRIFICATION CHARGE REDUCING APPARATUS - Provided is a vehicle electrification charge reducing apparatus, including: a steering operating device, a steering actuator; and a displacement transmitting system configured to transmit a displacement of the steering operating device to the steering actuator. At least one of the steering operating device, the steering actuator, or the displacement transmitting system includes two members that are engaged with each other through intermediation of a viscous lubricant agent so as to move relatively when the steering operating device is operated. A self-discharge type charge eliminator is fixed to a surface of a specific member forming the displacement transmitting system and the like, and the self-discharge type charge eliminator diselectrifies the specific member through self-discharge so as to decrease a charge amount of the specific member, to thereby decrease a difference in charge amount between the two members. | 03-03-2016 |
20160083008 | POWER STEERING APPARATUS AND METHOD FOR ASSEMBLING POWER STEERING APPARATUS - After a Hall IC sensor is set in a connector in such a manner that the Hall IC sensor and a harness are electrically connected to each other, the connector and the Hall IC sensor are inserted from an opposite side of a connector insertion hole in a radial direction toward one side of the connection insertion hole in the radial direction, and a first magnetism collection ring and a second magnetism collection ring are inserted into a torque sensor container portion from a first opening portion in such a manner that the Hall IC sensor is situated between the first magnetism collection ring and the second magnetism collection ring in the radial direction. | 03-24-2016 |
20160149476 | Brushless Direct Current Electric Motor and Electric Power Steering System - A brushless direct current electric motor includes a first sub-motor and a second sub-motor. The first sub-motor and the second sub-motor share a common rotor, and each comprises an independent stator. The stators of each sub-motor comprises a plurality of teeth and a plurality of windings. The teeth of the first sub-motor and the teeth of the second sub-motor are interleavingly arranged in a circumferential direction or arranged side by side in an axial direction. The first sub-motor and the second sub-motor are configured to cooperatively work as a single electric motor to output a normal power. When one of the sub-motors breaks down, the other sub-motor can be operated independently to enhance reliability and safety of the brushless direct current electric motor. | 05-26-2016 |
20160164447 | BLDC Motor - A BLDC motor, has a first sub-motor and a second sub-motor. The first and second sub-motors have independent input terminals and a common rotor, including a common output shaft. In a normal operating mode the two sub-motors operate together as one motor to output a normal operating power of the motor. In an emergency operating mode, when one sub-motor has become faulty and generates a braking torque, the normal sub-motor is operated to generate a torque to compensate for the braking torque produced by the faulty sub-motor. | 06-09-2016 |
20160174393 | ELECTRONIC CONTROL DEVICE AND METHOD OF MANUFACTURING SAME, AND ELECTRIC POWER STEERING CONTROL DEVICE | 06-16-2016 |
20160181885 | DRIVE DEVICE | 06-23-2016 |
20170232997 | ELECTRIC POWER STEERING APPARATUS | 08-17-2017 |