| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 701043000 | Fail-safe system | 62 |
| 20080294313 | ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus includes a first torque command value calculating means that calculates a first torque command value on the basis of steering torque detected by a steering torque detecting means, a malfunction torque detecting means that detects malfunction of the steering torque detecting means, and a self aligning torque estimating means that estimates self aligning torque transmitted from a road surface to a steering mechanism, and the apparatus further includes a second torque command value calculating means that calculates a torque command value on the basis of the self aligning torque estimated by the self aligning torque estimating means, and an switching means that selects the second torque command value calculating means. | 11-27-2008 |
| 20090048737 | AWAKE STATE ESTIMATION DEVICE - An awake state estimation portion calculates an average steering angle, an average steering angular speed and a corrective steering angle on the basis of the steering angle acquired from a steering angle detection portion. The awake state estimation portion acquires the traveling speed of the vehicle from a vehicle speed detection portion. The awake state estimation portion corrects the calculated corrective steering angle by a correction value commensurate with the type of the traveling path on which the vehicle is traveling, and estimates the degree of the awake state of the driver on the basis of the post-correction corrective steering angle. Besides, the awake state estimation portion specifically determines the correction value commensurate with the type of the traveling path on which the vehicle is traveling, on the basis of at least one of the steering angle, the average steering angular speed and the traveling speed. | 02-19-2009 |
| 20090055050 | STEERING APPARATUS FOR VEHICLE - A checking ECU | 02-26-2009 |
| 20090143942 | STEERING CONTROL SYSTEM - A steering control system is connectable to a motor configured to control a steering and a LAN (Local Area Network) and is allowed to receive a control signal for controlling said motor from the LAN is received. The steering control system includes: a motor configured to control a steering; a main calculation unit connectable to the LAN; a motor drive circuit connected to the main calculation unit and configured to drive the motor; a sub calculation unit connectable to the LAN; and a motor drive limiting unit connected to the sub calculation unit and configured to limit a drive of the motor. | 06-04-2009 |
| 20090157263 | SYSTEM AND METHOD FOR KEEPING A VEHICLE IN A LANE - The present invention relates, in general, to a system and method for keeping a vehicle in a lane in consideration of a steering wheel contortion angle, and more particularly, to a system for keeping a vehicle in a lane in consideration of a steering wheel contortion angle, which estimates the path of a vehicle in consideration of a steering wheel contortion angle attributable to the distortion of a steering shaft, thus improving the safety and riding comfort of occupants. | 06-18-2009 |
| 20090254254 | Adaptive nonlinear steering control system and method for work vehicles - A steering control system and method for automated steering of work vehicles that adapts to nonlinearities and uncertainties of steering mechanisms including a tolerance control law, a dynamic control law, and a saturation control law selected and executed in real time based on the magnitude of steering angle error, steering mode command, and manual override signal in real time. The dynamic control law includes a dynamic compensator having a double compensation zero, an integral, and a compensation gain, and further includes a deadband compensator and a control signal limiter. | 10-08-2009 |
| 20090271075 | SYSTEMS AND METHODS INVOLVING TORQUE DISTURBANCE REJECTION - A method for controlling a steering system, the method including, receiving a first signal including a position of a component in the steering system, receiving a second signal including a disturbance signal operative to indicate an effect of a first torque disturbance in the steering system, calculating a first counter acting torque command signal operative to minimize the first torque disturbance as a function of the position of the component and the disturbance signal, and sending the first counter acting torque command signal to a motor. | 10-29-2009 |
| 20100049403 | ELECTRIC POWER STEERING SYSTEM HAVING FAIL-SAFE CONTROL MODULE OPERATION - An electric power steering system is provided. It comprises a steering assist assembly and a motor assembly that actuates the steering assist assembly. A control module that provides steering assist commands to the motor assembly, the control module including a circuit board having a first portion having circuits thereon and a second portion that includes at least one sensor circuit that receives signals from at least one sensor subsystem. A potting material coats only the first portion of the circuit board. | 02-25-2010 |
| 20100057301 | Vehicle Steering Device - A vehicle steering device ( | 03-04-2010 |
| 20100076650 | FAILURE MODE EFFECTS MITIGATION IN DRIVE-BY-WIRE SYSTEMS - Systems and methods for mitigating failure mode effects in a steer-by-wire system. The system includes a controller configured to alter a direction of the vehicle when the controller is in a failure mode. A steering device is coupled to a detector. The detector is configured to detect a steering input from a driver and output a signal representative of the steering input. A first actuator is coupled to a first control device. The first control device is configured to generate a first control signal representative of the steering input when the controller is in the failure mode. The first actuator alters the direction of the vehicle by removing energy from the vehicle. A second actuator is coupled to a second control device. The second control device is configured to generate a second control signal representative of the steering input when the controller is in the failure mode. The second actuator alters the direction of the vehicle by adding energy to the vehicle. | 03-25-2010 |
| 20100235055 | Monitoring Device for the Function of an Electronic Control Device, and Method for this Purpose - A control system for fault detection has a control device for a measurement value signal, and a processor having a program that calculates at least one actuating value signal operatively connected to an actuator. At two process points in the control program, at least one control point (K) is defined at which the control device outputs a program output value, which forms a monitoring signal, and outputs the latter to a monitoring device. The monitoring signal contains at least two signal elements of three possible signal elements, wherein a first signal element represents the control point through which the control program should have run through directly before the present control point, and a second signal element which represents the present control point, and a third signal element which represents the next control point provided in the program process. The monitoring device checks the monitoring signals for the correct state, and a state signal can be output as a fault signal. | 09-16-2010 |
| 20110015828 | ELECTRIC POWER STEERING DEVICE - There is provided a controller for a steering device that makes it possible to prevent sudden ceasing of steering assisting power by effectively utilizing an auxiliary power source. An electric power steering device that generates steering assist force by a motor includes a battery for supplying electric power to the motor, an auxiliary power source that supplies the motor with electric power, and a control circuit for controlling a power supply to the motor. In the event of a breakdown of the battery, the control circuit adjusts a power supply to the motor from the auxiliary power source according to an amount of energy remaining in the auxiliary power source so as to reduce steering assist force. | 01-20-2011 |
| 20110040450 | ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus drives a motor to generate a steering assist force according to a steering torque and includes an output circuit for supplying the motor with electric power from at least one of a battery and an auxiliary power supply. The electric power steering apparatus has a control circuit which at or after detection of a breakdown of the battery, determines a length of time to the end of steering assist (decreasing time t | 02-17-2011 |
| 20110054741 | TRAVEL DIRECTION STABILIZATION SYSTEM FOR VEHICLES - A method for influencing the direction of travel of a vehicle. In order to lower the risk of accidents in driving situations in which the driver reacts incorrectly, for example because of being surprised, it is provided that the driving operation be monitored in reference to the occurrence of an event due to which the travel direction of the vehicle changes, deviating from the travel direction specified at the steering wheel, and when such an event is detected that an automatic intervention in the driving operation be performed whereby the vehicle is moved back approximately into the original direction of travel in which it was moving before the event occurred. | 03-03-2011 |
| 20110054742 | STEERING DEVICE FOR VEHICLE - If the main electric power source has failed, an assist control portion shifts the characteristic of an assist map in which the steering torque and the target current are connected in a relation by one step of shift in a direction of increase of the steering torque each time a steering operation that satisfies a steering operation criterion condition is performed. This allows a driver to feel a decline in the steering assist force each time of performing steering operation and therefore become aware of the abnormality. Besides, an upper-limit current of the assist map may be reduced each time the steering operation that satisfies the steering operation criterion condition is performed. Besides, an upper-limit electric power of an electric motor may be reduced each time the steering operation that satisfies the steering operation criterion condition is performed. | 03-03-2011 |
| 20120083973 | POSTURE CONTROL DEVICE OF MOTORCYCLE AND MOTORCYCLE - A system for performing posture control of a motorcycle is such that in outputting a synthesized output by adjusting a yaw direction output and a roll direction output outputted from a displacement detection sensor by an adjustment part respectively, a synthesized output in which the yaw direction output is larger than the roll direction output is outputted when a vehicle speed is low, and a synthesized output in which the roll direction output is larger than the yaw direction output is outputted when the vehicle speed is high. Accordingly, in either a case where the vehicle is traveling at a low speed or a case where the vehicle is traveling at a high speed, the displacement and the behavior of a motorcycle | 04-05-2012 |
| 20120253604 | STEERING MOTORS POWER SUPPLY METHOD AND POWER SUPPLY SYSTEM ADAPTED TO SUCH A METHOD - A method is provided for controlling power supply of an electrically powered steering system on-board an automotive land vehicle equipped with a high voltage source and a low voltage source. A first and a second steering motor operate at a nominal operating voltage which is higher than the voltage of the low voltage source, are fed by the high voltage source and may absorb respectively a first and a second nominal operating power. A step-up circuit is connected to the low voltage source, and is adapted to deliver a back-up electrical power in case of failure of the high voltage source. In the method, in case of failure of the high voltage source, back-up electrical power absorbed by each of the two motors is limited on the basis of a priority rule. | 10-04-2012 |
| 20120265404 | Cooperative Control Apparatus of Motor Driven Power Steering Apparatus For Smart Parking Assistant System - The present invention relates to a cooperative control apparatus of a motor driven power steering apparatus for a smart parking assistant system (SPAS). The cooperative control apparatus may relieve excessive response of the motor driven power steering apparatus even through an excessive required steering angle is inputted from the SPAS, prevent damage of the motor driven power steering apparatus by controlling the motor driven power steering apparatus through a motor angular speed, reduce vibration, and improve steering performance with high control precision regardless of external disturbance. | 10-18-2012 |
| 20130013155 | SAFETY STEERING SYSTEM FOR AUTOMOBILES - The various embodiments herein provide a safety steering mechanism for an automobile. The mechanism comprises a steering wheel mechanism for changing a direction of movement of the automobile. A jack is connected to an automobile wheel for providing backward and forward movement of an axle with respect to the steering wheel movement. A hydraulic pump is providing in a hydraulic stream. A control valve regulates a direction of motion of the hydraulic stream. A plurality of directional control valves cut a hydraulic stream between the control valve and the jack. A main valve controls the backward and forward motion of the jack. At least one sensor installed on each tire of the automobile generates signals corresponding to a tire pressure. A plurality of electronic units processes signals from the plurality of the sensors and passes an output signal to an electronic control unit (ECU). | 01-10-2013 |
| 20130090813 | Electronic Control Apparatus - An electronic control apparatus includes a control unit | 04-11-2013 |
| 20130131927 | FOUR-WHEEL STEERING CONTROL SYSTEM - A four-wheel steering control system includes; a torque sensor that detects a steering torque based on an operation of a steering member; a steering angle sensor that detects a steering angle; a steering assist control unit that calculates an assist force for steering front wheels based on the value detected by the torque sensor; and a steered system control unit that executes steered control on rear wheels based on the value detected by the steering angle sensor or the value detected by the torque sensor. When it is determined that there is a failure in a function of the steering assist control unit, the steered system control unit executes the steered control such that the rear wheels are steered only on the side where the steered angle of the rear wheels is opposite in phase from the steering angle of the steering member. | 05-23-2013 |
| 20130138300 | VEHICLE STEERING SYSTEM - In a vehicle steering system, when a sensor malfunction determination unit detects a malfunction of a rotation angle sensor, the sensor malfunction determination unit changes a control mode from a first control mode to a second control mode. In the second control mode, an actual rotor angle (mechanical angle) (θ | 05-30-2013 |
| 20130144493 | VEHICLE STEERING SYSTEM - When a partial malfunction is detected, a sensor malfunction determination unit changes a control mode from a first control mode to a second control mode. When the control mode is changed from the first control mode to the second control mode, a steered system motor is rotated in a direction corresponding to a rotation direction of a steering wheel immediately before the partial malfunction occurs in the angle sensor. When the absolute value of a steering angular velocity of the steering wheel exceeds a threshold, it is determined that a driver has operated the steering wheel in a direction opposite to a current steered direction, and the rotation direction of the steered system motor is reversed. | 06-06-2013 |
| 20130166151 | TRAVEL DIRECTION STABILIZATION SYSTEM FOR VEHICLES - A method for influencing the direction of travel of a vehicle. In order to lower the risk of accidents in driving situations in which the driver reacts incorrectly, for example because of being surprised, it is provided that the driving operation be monitored in reference to the occurrence of an event due to which the travel direction of the vehicle changes, deviating from the travel direction specified at the steering wheel, and when such an event is detected that an automatic intervention in the driving operation be performed whereby the vehicle is moved back approximately into the original direction of travel in which it was moving before the event occurred. | 06-27-2013 |
| 20130179040 | ELECTRIC POWER STEERING SYSTEM - In an electric power steering system, a control signal output section outputs independent dual-system control signals to driver circuits that are disposed in connection with independent dual-system motor coils. The control signal output section gives high priority to the output of the control signal to the other system, when the occurrence of energization failure is detected in one system. When the energization failure occurring phase is only one phase and the value of the basic command exceeds the upper limit of the priority command, the control signal output section outputs the control signal to the driver circuit in the system where the energization failure has occurred in order to supply electric power in which the two phases other than the energization failure occurring phase are used as the energized phases on the bases of the complementary command that corresponds to the excess of the upper limit. | 07-11-2013 |
| 20130218418 | VEHICLE STEERING SYSTEM - A vehicle steering system includes: a steering mechanism that includes a steering member, a steering angle detecting unit and a direction detecting unit that detects a steering direction with reference to a neutral position of the steering member; a steered mechanism that includes a steered wheel and a turning actuator having a turning motor, and that is not mechanically coupled to the steering mechanism; and a control device that controls the turning motor and that, at the time of a failure of the steering angle detecting unit, controls the turning motor by determining a turning motor command value for controlling the turning motor on the basis of a detected signal from the direction detecting unit. | 08-22-2013 |
| 20130253771 | VEHICLE STEERING SYSTEM - A vehicle steering system, in which a steering member and steered wheels are not mechanically coupled to each other, includes a rotation angle restriction mechanism that restricts a rotation angle of the steering member within a restricted angular range. In a failure mode, that is, in a case where a malfunction occurs in a steering angle sensor, a steering direction is detected on the basis of a strain of the rotation angle restriction mechanism, which is detected by one of strain gauges at a corresponding one of a pair of terminal ends of a restricted angular range. Drive control is executed on a steered system actuator on the basis of the detected steering direction. | 09-26-2013 |
| 20130253772 | VEHICLE STEERING SYSTEM - In normal times, a rotation angle restriction mechanism in a first state restricts a rotation angle of a steering member within a first rotation angular range. In the event of a failure, that is, when there is a malfunction in a steering angle sensor, the rotation angle restriction mechanism is switched into a second state by an electromagnetic clutch, and the rotation angle of the steering member is restricted within a second rotation angular range. A steering direction is detected on the basis of at which one of a pair of terminal ends of the second rotation angular range, the steering member is located. An ECU executes drive control on a steering system actuator on the basis of the detected steering direction. | 09-26-2013 |
| 20130253773 | ELECTRIC POWER STEERING DEVICE AND SENSOR ABNORMALITY DETECTION DEVICE - An ECU controls the operation of an EPS actuator in order to periodically apply instantaneous motor torque to a steering system when assist continuation control is executed using a sensor signal (residual sensor signal) that is output by a sensor element in which an abnormality has not been detected, regardless of the application of an assist force. The ECU also detects an abnormality in the residual sensor signal based on whether the application of instantaneous motor torque is reflected in the residual sensor signal, which is the basis of the assist continuation control. | 09-26-2013 |
| 20130304327 | ELECTRIC POWER STEERING DEVICE - An electric power steering device provides an appropriate power assist from the motor even when torque sensors have failed and the steering torque is no longer detected. If an error is detected in a torque sensor, the motor is driven based on the rotor rotation angle detected by a resolver and assist characteristics. When the absolute value of the rotor turning angle velocity calculated based on the rotor rotation angle falls to or below a prescribed value, a process is started for reducing the current driving the motor, and if the state in which the absolute value of the rotor turning angle velocity has fallen to or below the prescribed value continues over a prescribed length of time, the process for reducing the current is interrupted and, because an assist current was flowing at said time of interruption, an appropriate power assist can be given during a steering retention period. | 11-14-2013 |
| 20140005894 | ELECTRIC POWER STEERING APPARATUS | 01-02-2014 |
| 20140046549 | Method for compensating for a disturbance yaw moment in a vehicle having at least two wheel-individual drives - A device for compensating for a disturbance yaw moment in a vehicle having at least two wheel-individual drives is described. In particular in vehicles having multiple wheel-individual electric drives, wear or heavy use may result in a defect of a single drive. Since this drive is coupled to a single wheel of the vehicle, a strong disturbance yaw moment may be generated thereby which may result in the vehicle breaking away if countermeasures are not taken. It is provided to compensate for the disturbance yaw moment at least partially by effectuating a compensation yaw moment by retarding one or multiple of the other wheels of the vehicle in a targeted manner, when an event is detected which indicates a disturbance yaw moment of the vehicle and in which one wheel of the vehicle is excessively retarded due to a defect on a wheel-individual drive assigned to the wheel. | 02-13-2014 |
| 20140163823 | SYSTEM AND METHOD FOR IMPROVING STEERING FEELING IN NEUTRAL GEAR POSITION OF VEHICLE - Disclosed herein is a system and method for improving a steering feeling of a driver while preventing a heavy feeling of a steering wheel or a kickback phenomenon during an eco-roll operation for improving a fuel ratio of the vehicle. The method includes determining, by a controller, an eco-roll operation condition in which a brake is disengaged, an accelerator pedal is disengaged, and a speed of the vehicle is a reference speed or higher. Furthermore, when the eco-roll operation condition is determined, the controller coverts a gear state of a transmission into a neutral gear state. The controller also controls an engine RPM to an idle RPM to start the eco-roll mode and an operation of an emergency steering system to assist steering power according to a steering input due to a driver manipulation of a steering wheel while the traveling in a neutral gear state of an eco-roll mode. | 06-12-2014 |
| 20140249724 | ELECTRIC POWER ASSIST STEERING MOTOR SENSOR REDUNDANCY - An electric power assist steering motor sensor redundancy system is disclosed comprising a brushless motor selectively providing a first predetermined level of steering assistance for a vehicle. A first sensor and second sensor provide position information of the brushless motor to a motor controller. An alternative sensing system for the brushless motor may be selectively utilized to provide position information of the brushless motor to the controller when at least one of the first sensor or the second sensor fails. | 09-04-2014 |
| 20140309890 | OUTPUT STAGE CONTROL IN THE EVENT OF A FAULT - A method for implementing a transition from a functioning steering assistance system to a deactivated steering assistance system when a fault occurs, comprising the following steps: establishing the fault of the steering assistance system; establishing that all high-side power switches are functional (first case), or establishing that all low-side power switches are functional (second case); and in the first case: opening all high-side power switches and performing PWM-like control of the low-side power switches; or in the second case: opening all low-side power switches and performing PWM-like control of the high-side power switches. | 10-16-2014 |
| 20150066304 | LEFT-RIGHT INDEPENDENT STEERING CONTROL SYSTEM AND METHOD THEREOF - The present disclosure relates to a left-right independent steering control system and a method thereof, particularly a left-right independent steering control system that controls the other steering system such that the steering angles of both wheels satisfy Ackerman condition, when the steering angle of a vehicle is not controlled in accordance with steering input from a driver due to a breakdown in any one of left wheel and right wheel steering systems of the vehicle, and a method thereof. | 03-05-2015 |
| 20150066305 | ELECTRIC POWER STEERING SYSTEM - There is provided an reliable electric power steering system. The electric power steering system includes a torque sensor that outputs a detection signal corresponding to a steering torque, and a controller. The controller computes a detected steering torque value based on the detection signal, and a torque differential value, which is a first-order time differential value of the detected steering torque value. The controller computes a current command value by providing compensation to a basic current command value based on the detected steering torque value with the use of a compensation value based on the torque differential value. When the detected steering torque value is held for a predetermined period, the controller holds the torque differential value at a value computed before the detected steering torque value is held, during the period in which the detected steering torque value is held. | 03-05-2015 |
| 20150066306 | ELECTRIC POWER STEERING SYSTEM - There is provided an electric power steering system that makes it possible to reduce an uncomfortable feeling given to a driver even when a detected steering torque value is held. The controller computes a detected steering torque value based on the detection signal, and provides compensation based on a compensation value to a basic current command value to compute a current command value. The controller executes feedback control for causing a current value of the motor to follow the current command value. The controller executes normal control in which the detected steering torque value is periodically updated and backup control in which periodic updating of the detected steering torque value and holding of the detected steering torque value are alternately executed. The controller switches compensation value between a compensation value used during execution of the normal control and a compensation value used during execution of the backup control. | 03-05-2015 |
| 20150120145 | FAULT TOLERANT APPARATUS AND METHOD FOR AN INDEPENDENT CONTROLLED STEERING IN A FOUR WHEEL DRIVE SYSTEM - The present disclosure relates to fault management apparatus and method for an independently controlled steering system in a four wheel drive system. The apparatus includes: a steering system unit that is disposed at four wheels of a vehicle, controls steering of the wheels, and collects and transmits the state information of the wheels; and a control unit that controls the steering system unit in accordance with the state information transmitted from the steering system unit. According to the present disclosure, when there is a fault in one or more wheels of a four wheel drive vehicle, it is possible to stabilize the vehicle body by actively adjusting the steering angles of the wheels that normally work and the speed of the vehicle in accordance with the fault environment. | 04-30-2015 |
| 20150298726 | STEERING CONTROL SYSTEM FOR VEHICLE AND STEERING CONTROL METHOD FOR VEHICLE - A steering control system for a vehicle includes an electric motor, a torque sensor, an angular velocity sensor, and a control unit. The electric motor applies assist force to a turning operation of a steering wheel. The torque sensor detects a torque generated in a steering system including the steering wheel and varying with the turning operation. The angular velocity sensor detects an angular velocity generated in the steering system and varying with the turning operation. The control unit computes an assist control amount for the turning operation by using the torque and the angular velocity, and, when an abnormality occurs in a torque detection operation, increases a control amount computed by using the angular velocity among control amounts that constitute the assist control amount as compared to that when torque sensor operation is normal and executes drive control over the electric motor based on the assist control amount. | 10-22-2015 |
| 20150298727 | ELECTRIC POWER STEERING APPARATUS - The apparatus herein provided includes a plurality of systems including driving circuits ( | 10-22-2015 |
| 20150314803 | VEHICLE CONTROL DEVICE - A vehicle control device includes: an angle sensor configured to detect a rotation angle of a steering system of a vehicle; an actuator mounted on the vehicle; and a control device configured to perform a vehicle control by controlling the actuator based on the detection result of the angle sensor. At a time the angle sensor has failed, the control device is configured to limit the vehicle control at a time an estimation angle error obtained based on a failure time of the angle sensor and the rotation speed of the steering system is not smaller than a predetermined reference value and not to limit the vehicle control at a time the estimation angle error is smaller than the reference value. | 11-05-2015 |
| 20150314804 | ELECTRIC POWER STEERING DEVICE FOR VEHICLE - An electric power steering device for a vehicle includes a plurality of assist systems electromagnetically driving an electric motor. When a first or second assist system malfunctions, a malfunction state assist amount calculation part calculates an assist amount while decreasing a limit value at the vehicle stopping, to an amount smaller than a limit value at the vehicle moving. When a malfunction such as a disconnection or a fixing of the switching elements occurs in the first or second assist systems on the basis of a judgment result of a malfunction judgment function, an assist amount switching part supplies an assist amount received from the malfunction state assist amount calculation part to first and second motor drive control parts. When a malfunction occurs in one of the first and second assist systems, one of the first and second motor drive control parts drives the motor by using the assist amount. | 11-05-2015 |
| 20150321692 | VEHICLE STEERING APPARATUS - A vehicle steering apparatus includes a steering reaction force generating device including a steering reaction force motor, a turning device including a turning motor, a clutch device including an electromagnetic solenoid configured to mechanically engage and disengage the steering reaction force generating device and the turning device, a turning motor temperature sensor configured to detect a motor temperature value of the turning motor, a current integrated value acquiring unit configured to acquire a current integrated value of the turning motor, an abnormality diagnostic unit configured to diagnose whether the turning motor temperature sensor is normal, and a drive control unit configured to control the drive of the electromagnetic solenoid on the basis of the current integrated value of the turning motor acquired by the current integrated value acquiring unit if the abnormality diagnostic unit diagnoses the turning motor temperature sensor as being in an abnormal state. | 11-12-2015 |
| 20150321696 | METHOD FOR CONTROLING REAR WHEEL STEERING - Provided is a method for controlling rear wheel steering provided for a vehicle. The method includes: recognizing an abnormal condition of a sensor; calculating a speed of a vehicle; calculating a steering angular velocity of the vehicle; calculating torque of a steering column of the vehicle; determining a curvature of a lane along which the vehicle is traveling; and determining a rear wheel steering angle of the vehicle based on the speed of the vehicle, the steering angular velocity, the torque of the steering column, and the curvature of the lane. | 11-12-2015 |
| 20150353079 | VEHICLE TRAVEL CONTROL APPARATUS AND VEHICLE TRAVEL CONTROL METHOD - In order to suppress misoperation of stability control resulting from neutral position displacement, between the steering input mechanism configured so that a steering shaft rotates in accordance with the steering manipulation of the driver and a turning output mechanism configured so that wheels are turned with the rotation of the pinion shaft, a clutch is inserted that disconnectably joins the steering shaft and the pinion shaft. A first turning motor and a second turning motor are provided that can give a turning force to the turning output mechanism, and the first turning motor and the second turning motor are driven and controlled so that a turning angle in accordance with the steering manipulation by the driver is realized while the clutch is disconnected. When neutral position displacement occurs of the neutral position of the steering shaft and the neutral position of the pinion shaft, the stability control is suppressed. | 12-10-2015 |
| 20150360715 | VEHICLE STEERING DEVICE - The steering device includes first and second motors for steering which have common electric characteristics; first and second current sensors detecting first and second current values in the first and second motor, respectively; and abnormality diagnosis units. The abnormality diagnosis units make an abnormality diagnosis indicating that the steering device is abnormal when difference between the first and second current values exceeds a predetermined threshold value. When some abnormality occurs in the current detecting units for detecting the magnitudes of a current flowing through the steering motor, an abnormality diagnosis is rapidly made by comparing the difference with the predetermined value. | 12-17-2015 |
| 20150367881 | Electric Power Steering Apparatus - There is provided an electric power steering device capable of detecting steering torque with high accuracy without use of a torque sensor, and capable of performing appropriate steering assistance control. An alternative torque correction value (Tc) is operated by comparing alternative torque (T | 12-24-2015 |
| 20150367882 | METHOD OF PREVENTING OVER STROKE IN REAR-WHEEL STEERING SYSTEM AND LINEAR SENSOR APPLIED THERETO - The present invention relates to a method of preventing over stroke in a rear-wheel steering system for a vehicle, and more particularly, to a method of preventing the over stroke of a lead screw using a linear sensor moving together with the lead screw in a rear-wheel steering system. In detail, there is provided a method of preventing over stroke in a rear-wheel steering system, including determining whether a linear sensor which moves in conjunction with a lead screw enters preliminary sections A of a stroke section a and restricting the movement of the lead screw when the linear sensor enters the preliminary sections A. | 12-24-2015 |
| 20150375776 | ELECTRIC POWER STEERING SYSTEM AND METHOD FOR PROCESSING FAIL-SAFE OF ELECTRONIC CONTROL UNIT - Disclosed are an electric power steering system and a method for processing a fail-safe of an electronic control unit. The present invention provides an electric power steering system including: a torque sensor configured to a steering torque value of a steering wheel; a steering angle sensor configured to detect a steering angle value of the steering wheel; a motor position sensor configured to detect a motor rotation angle value which is a rotated angle of a driving shaft of an electric motor; and an electronic control unit configured, when the torque sensor is normal, to generate a first steering assist current for controlling a driving force of the electric motor using the steering torque value, and when the torque sensor fails, to estimate a target motor angular velocity of the electric motor using the steering angle value and the motor rotation angle value and to generate a second steering assist current so as to cause a current motor angular velocity of the electric motor to converge to the target motor angular velocity. | 12-31-2015 |
| 20160001815 | POWER STEERING DEVICE - A power steering apparatus includes: a steering load average value calculating circuit | 01-07-2016 |
| 20160006387 | ROTARY MACHINE CONTROL APPARATUS - A rotary machine control apparatus controlling a drive of a rotary machine that has multiple winding groups is provided. The rotary machine control apparatus includes electric power converters in multiple systems, a failure detection portion, and a control portion. An electric power converter has switching elements in an upper arm and a lower arm and converts DC power. The failure detection portion detects a failure of an electric power converter or a winding group. The control portion calculates a current command value and a maximum current limit value, and controls an output to the electric power converter. The control portion stops the output to the electric power converter in a failure system, and the control portion increases the maximum current limit value with respect to the output to an electric power converter in a normal system. | 01-07-2016 |
| 20160046287 | IMPROVEMENTS IN VEHICLE STEERING - A motor vehicle control system operable in a steering assist mode in which the system is configured to: detect steering angle; and control a distribution of torque to one or more wheels of the vehicle in dependence on the detected steering angle thereby to induce a turning moment in the direction of turn indicated by the steering angle. | 02-18-2016 |
| 20160059886 | Electric Power Steering System - An electric power steering system is provided which can take an abnormality countermeasure without being affected by a torque abnormality signal and without giving an uncomfortable feeling to a driver when torque abnormality occurs. Abnormality of a steering assist command value is detected by employing a dual detection configuration of a main ECU clip ( | 03-03-2016 |
| 20160075371 | PROVIDING ASSIST TORQUE WITHOUT HAND WHEEL TORQUE SENSOR FOR ZERO TO LOW VEHICLE SPEEDS - A method of controlling an electric power steering system of a vehicle is provided. The method estimates steering rack force to be caused by a tire of the vehicle and a surface of a ground with which the tire is in contact in response to determining that one or more hand wheel torque sensors of the vehicle are not enabled. The method generates a steering assist torque command based on the estimated steering rack force. The method controls the electric power steering system using the steering assist torque command. | 03-17-2016 |
| 20160090118 | FAIL SAFE APPARATUS AND METHOD FOR MDPS SYSTEM - A fail safe apparatus for an MDPS system may include: a vehicle speed sensor configured to measure a vehicle speed; a gear stage input unit configured to receive a gear stage from a transmission of the vehicle; a GPS vehicle speed calculation unit configured to calculate a GPS vehicle speed based on location information of the vehicle; and a control unit configured to determine whether the vehicle speed is an error, based on one or more of the vehicle speed, the gear stage, and the GPS vehicle speed, and determine vehicle speed data of the MDPS system based on one or more of the gear stage and the GPS vehicle speed. | 03-31-2016 |
| 20160101809 | METHOD AND APPARATUS FOR CONTROLLING ELECTRIC POWER STEERING - The present invention relates to a method and apparatus for controlling electric power steering. In particular, the present invention provides a power steering control method that includes: a breakdown detection step of detecting whether a torque sensor has broken down; an information reception step of receiving steering angle information and vehicle speed information in the case in which the torque sensor has broken down; a compensation target value calculation step of calculating a self-aligning torque, and a damping force, an inertial force, and a frictional force of an electric power steering apparatus by using one or more of the steering angle information and the vehicle speed information; and a current control step of calculating a steering assist force based on the compensation target value and controlling the supply of a motor control current that corresponds to the steering assist force, and an apparatus for the same. | 04-14-2016 |
| 20160101812 | STEERING ASSIST CONTROL APPARATUS AND STEERING ASSIST CONTROL METHOD - In a steering assist control apparatus including a steering assist control unit that controls the steering of an own vehicle by a manipulated variable allowing the own vehicle to run along a lane recognized by a lane recognition unit, and a control stop unit that decrease the manipulated variable with time when an abnormality detection unit detects a recognition abnormality in the lane recognition unit, the control stop unit decreases the manipulated variable at a manipulated variable decrease rate corresponding to a manner of the recognition abnormality. Thereby, at the time of the occurrence of the abnormality, it is possible to more adequately decrease the manipulated variable for the steering assist control, corresponding to the manner of the abnormality. | 04-14-2016 |
| 20160167701 | ELECTRIC POWER STEERING SYSTEM FOR VEHICLE | 06-16-2016 |
| 20160200353 | POWER STEERING DEVICE AND CONTROL DEVICE FOR VEHICLE-MOUNTED INSTRUMENT | 07-14-2016 |
| 20170232973 | VEHICLE CONTROL APPARATUS | 08-17-2017 |
| 20190144032 | Vehicle Kinetic Control System for a Rear Wheel of a Vehicle | 05-16-2019 |
