Condition Modulated Patents (Class 180/446)
  • Patent number: 11370479
    Abstract: Disclosed are an apparatus for and a method of compensating for a steering error in an advanced driving assistance system, and the apparatus includes a command steering angle correction module that corrects a command steering angle according to whether or not the command steering angle input from the advanced driving assistance system satisfies a preset error compensation condition; and a motor control unit that controls a motor of a motor-driven power steering system according to the command steering angle corrected by the command steering angle correction module.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: June 28, 2022
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Tae Hong Kim
  • Patent number: 11352048
    Abstract: A rotation detection device includes a rotation detection circuit, a step-up power supply circuit, a step-down power supply circuit, a first power supply path, and a second power supply path. The rotation detection circuit is configured to detect a rotation number of a motor that generates a torque applied to a steering mechanism of a vehicle, based on an electric signal. The electric signal is generated according to a rotation angle of the motor that is acquired through an in-vehicle sensor.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: June 7, 2022
    Assignees: JTEKT CORPORATION, RENESAS ELECTRONICS CORPORATION
    Inventors: Kenichi Kozuka, Masato Oda, Tadashi Kawahara, Masashi Oki
  • Patent number: 11345396
    Abstract: A modular power steering apparatus includes a rotatable shaft, which is selectively rotatable to effect turning movement of at least one vehicle wheel. A housing supports the rotatable shaft for rotation relative thereto, about a shaft axis. A first rotational input assembly is provided for transmitting a steering command from a steering member to the rotatable shaft. A second rotational input assembly is operatively connected with the rotatable shaft. The second rotational input assembly is configured to apply a rotational force to the rotatable shaft. The apparatus includes a plurality of drive stations. Each drive station is configured to selectively accept both of the first and second rotational input assemblies for operating connection to the rotatable shaft at different times.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: May 31, 2022
    Assignee: ZF ACTIVE SAFETY AND ELECTRONICS US LLC
    Inventors: Mark A. Cartwright, Ryan L. Noerenberg
  • Patent number: 11338845
    Abstract: A method for operating an electrical power steering system of a transportation vehicle wherein a steering wheel angle is pre-defined by a steering wheel as a measure for a desired wheel steering angle for at least one steerable wheel of the transportation vehicle, where an electrical power drive with an electric motor provides a steering support, and where a support torque of the steering support is reduced based on a damping function in response to the combustion engine of the transportation vehicle being started. Also disclosed is an associated electrical power steering system, to a computer program, and to a control appliance.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: May 24, 2022
    Inventors: Jens Zientek, Marcel Gross
  • Patent number: 11338850
    Abstract: A method of operating a motor vehicle includes sensing a sensed torque based on a driver interaction with a steering wheel that is part of an electric power steering system, the sensed torque being sensed using a torque sensor, calculating driver steering wheel torque using state variables of a steering system model based on the electric power steering system, and controlling a difference between the driver steering wheel torque calculated from the steering system model and sensed torque sensed by the torque sensor to converge to zero through a controller.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: May 24, 2022
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Woo Je Sung, Jong Ho Lee, Seung Bum Cho
  • Patent number: 11332186
    Abstract: The failure detection device includes: an output unit detecting failure of a torque detection device that detects torque applied to a pinion shaft with torque sensors, and a target current calculation unit controlling drive of the electric motor. In response to detection of failure of one of the torque sensors, the target current calculation unit causes the motor to output continuous torque continuously generating torque that is detectable by the other of the torque sensors and, in response to the motor outputting the continuous torque, the output unit diagnoses failure of the other of the torque sensors based on a pattern of vibrations detected by the other torque sensor due to the continuous torque and determines that the other torque sensor is having failure if amplitude of vibrations is less than a reference amplitude.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: May 17, 2022
    Assignee: HITACHI ASTEMO, LTD.
    Inventor: Hiroaki Kurihara
  • Patent number: 11312410
    Abstract: The electric power steering apparatus according to the present disclosure includes a steering assist mechanism and a controller. The steering assist mechanism is driven by a motor and assists operation of a steering wheel by a driver. The controller acquires the position of the steering wheel and sets a target value of a steering reaction torque acting on the steering wheel. Then, the controller calculates a position target of the steering assist mechanism based on the position of the steering wheel and the target value of the steering reaction torque, and controls the motor of the steering assist mechanism according to the position target of the steering assist mechanism.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: April 26, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshihide Sekiya, Shunsuke Yoshida, Tomoyuki Iida, Takashi Suzuki
  • Patent number: 11299194
    Abstract: The invention relates to a steer-by-wire system, that includes a steering mechanism, a sensor for detecting a driver request, a steering control device, power electronics, an electric servomotor, a steering rack that can be moved by the servomotor and an actor for generating a feedback torque (MFF) at the steering mechanism as a function of a steering rack position, wherein the steering control unit is configured in such a way so as to subtract, based on the feedback torque (MFF), at least a portion from a driver request determined based on sensor data, and a method for operating a steer-by-wire system.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: April 12, 2022
    Assignee: VOLKSWAGEN AKTIENGESELLSCHAFT
    Inventor: Johannes Maria Schäfer
  • Patent number: 11299196
    Abstract: The failure detection device includes: a failure detection unit configured to detect failure of a torque detection unit, the torque detection unit detecting torque applied to a rotary shaft with plural torque sensors; and a controller configured to control drive of a motor such that the motor outputs continuous torque in an event that the failure detection unit detects failure of the torque detection unit, the continuous torque continuously generating torque that is, if at least one of the plural torque sensors is working properly, detectable by the at least one of the plural torque sensors.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: April 12, 2022
    Assignee: HITACHI ASTEMO, LTD.
    Inventor: Hiroaki Kurihara
  • Patent number: 11299199
    Abstract: The present disclosure relates to an apparatus and a method for EPS control, which determine the amount of assist torque and estimate the amount of available assist in order to prevent a problem in relation to vehicle driving and driver's safety when there is malfunction in power supply. Accordingly, the present disclosure provides an effect in which the driver can take various measures according to his or her determination, instead of promptly moving the vehicle to a safety zone.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: April 12, 2022
    Assignee: MANDO CORPORATION
    Inventor: KwangHyung Lee
  • Patent number: 11296625
    Abstract: A control device 1 for a synchronous electric motor that switches a drive control of the synchronous electric motor to a PWM drive control and a rectangular wave drive control includes a PWM signal generator 14 configured to generate a PWM signal, a rectangular wave signal generator 22 configured to generate a rectangular wave signal, a rotation speed detector 40 configured to detect a rotation speed of the motor 2, a signal switching determination part 50 configured to determine, according to at least the rotation speed, whether the PWM signal or the rectangular wave signal is used as a control signal when controlling the drive of the motor 2, and a drive controller 30 configured to control the drive of the motor 2 using a signal determined by the signal switching determination part 50 to be used as the control signal.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: April 5, 2022
    Assignee: Sinfona Technology Co., Ltd.
    Inventor: Makoto Maruyama
  • Patent number: 11283389
    Abstract: A motor system includes first and second solid-state relays disposed between an inverter configured to control energization to a first coil set of a motor and an in-vehicle battery for supplying power to the inverter, and connected in series in this order in a direction from the inverter to the battery. The first solid-state relay has a first diode of which a forward direction is from the battery to the inverter. The second solid-state relay has a second diode of which a forward direction is from the inverter to the battery. Motor relays, each having a third diode of which a forward direction is from the neutral point to the inverter, are connected to the phase coils of the first coil set. When power supply from the battery to the inverter is interrupted, the first solid-state relay is turned off after the motor relays are turned off.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: March 22, 2022
    Assignee: HITACHI ASTEMO, LTD.
    Inventors: Makoto Kimura, Masaki Itabashi
  • Patent number: 11273865
    Abstract: A steering control device for use in a steer-by-wire system is provided. The steering control device controls a reaction force device and a turning device of a steer-by-wire system. The steering control device includes a steering wheel torque controller that calculates a basic reaction force torque command value being a basic value of a reaction force torque command value so that a detection value of the torque sensor follows a target value. The steering control device further includes an end controller that stops a control of the steering wheel torque controller when: an absolute value of angle of the reaction force device or the turning device is equal to or greater than a limit angle value; and a physical quantity corresponding to an output torque of the turning device and the detection value of the torque sensor are values corresponding to approach to the limit angle value.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: March 15, 2022
    Assignee: DENSO CORPORATION
    Inventor: Takashi Suzuki
  • Patent number: 11273867
    Abstract: A steering angle sensor assembly for a vehicle steering gearbox can include a protective housing mounted to a housing of the steering gearbox and a steering angle sensor. The protective housing can include a case, a cover and a gasket connected to each other such that the case, the cover and the gasket form an interior space with the gasket sandwiched between the case and the cover. Each of the case and the cover can include an opening configured to receive a pinion shaft of the steering gearbox when the steering angle sensor assembly is mounted on the housing. The steering angle sensor can be secured in the interior space of the protective housing and can engage the pinion shaft when the protective housing is mounted to the housing and the pinion shaft is received by the opening in each of the case and cover.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: March 15, 2022
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Jason A. Sovern, Seth A. Ritchie
  • Patent number: 11273866
    Abstract: Provided is a torque sensor and an electric power steering system, which are capable of suppressing a detection property fluctuation between two magnetic sensors. A retaining portion is disposed at first and second magnetism collecting members in such a position as to be magnetically symmetrical with respect to first and second magnetic sensors.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: March 15, 2022
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Hiroki Murakami, Kohtaro Shiino
  • Patent number: 11271503
    Abstract: A technique for reducing an operation noise even when a high-pass filter is used for controlling a motor is provided. A controller is used in a motor control system for driving a motor used for position control by using a drive circuit and an inverter. The controller includes a current control block for receiving a motor current and outputting a reference voltage, a motor control circuit for outputting a signal indicating a duty ratio from the reference voltage output from the current control block, a dead band compensation block for calculating a compensation value of a non-linear element of a drive system, and an adder. The dead band compensation block outputs a duty value corresponding to the dead band at a timing at which the motor current crosses zero. The adder adds the duty value to a signal indicating the duty ratio and outputs the signal.
    Type: Grant
    Filed: November 22, 2018
    Date of Patent: March 8, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Shuji Endo, Hajime Nakane, Takuya Yokozuka, Mikio Morishima, Tokuji Tatewaki
  • Patent number: 11254356
    Abstract: The vehicle control system is applied as a system of a vehicle mounted with an EPS device having an electric motor driven to control the steering angle. The vehicle control system includes a controller configured to perform steering control for controlling an energization of the electric motor to control the steering angle of the wheels. When the wheels are held after being steered by a specific steering in the steering control, the controller performs a steering return process in which the wheels are turned back and held in a direction opposite to a steering direction of the specific steering. And during a stationary steering-holding in which the steering angle is held and the vehicle is stopped, the controller performs an energization suppression process for reducing energization to the electric motor to be smaller than the energization before the stationary steering-holding.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: February 22, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Masaya Kato
  • Patent number: 11254354
    Abstract: A motor control method for controlling a motor of an electric power assisted steering system includes: generating a low pass torque signal and a high pass torque signal, respectively; generating a low frequency assist torque signal using the low pass torque signal and the vehicle speed; generating a high frequency assist torque signal using a high pass torque signal and the vehicle speed; generating a torque command signal using a sum of the low frequency assist torque signal and the high frequency assist torque signal; and generating a voltage output signal for driving the motor using the torque command signal.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: February 22, 2022
    Assignee: ERAE AMS CO., LTD.
    Inventors: Jung Il Lee, Seung Ryong Baek, Sang Seob Lee
  • Patent number: 11247725
    Abstract: A steering controller is disclosed, wherein the steering controller is configured in such a way as to obtain input signals from at least one sensor for detecting a steering request of a motor vehicle driver and at least one driver assistance system, wherein the steering controller is also configured to generate an actuating signal for a power electronics unit. The actuating signal is assembled from two components, wherein the steering controller is configured so that the first component is ascertained from the input signal from the at least one sensor. The signals from the driver assistance system have no influence on the first component. The second component is ascertained from the input signals from the at least one driver assistance system, wherein the signals from the sensor are taken into account in the second component.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: February 15, 2022
    Assignee: VOLKSWAGEN AKTIENGESELLSCHAFT
    Inventor: Johannes Maria Schäfer
  • Patent number: 11251731
    Abstract: A motor control system includes an inverter, and a control unit that feedback-controls the inverter. The control unit includes a voltage control unit that calculates a voltage command value indicating a voltage to be applied to the motor from the inverter based on a current deviation between a current command value and an actual current detection value, and a torque ripple compensation unit that adds a compensation value for compensating a torque ripple in the motor to a signal value on at least one of an upstream side and a downstream side in a signal flow passing through the voltage control unit. The torque ripple compensation unit calculates the compensation value based on an actual angular velocity at which the motor rotates and the target current command value, and based on advance angle control for compensating a response delay of the motor control system with respect to the compensation value.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: February 15, 2022
    Assignee: NIDEC CORPORATION
    Inventors: Shuji Endo, Tokuji Tatewaki, Tomoya Ueda, Masanori Watahiki, Tomonari Mori
  • Patent number: 11214304
    Abstract: Inverter circuits are provided for motor winding sets, respectively. Control units are provided for the motor winding sets to generate control signals related to driving of the inverter circuits and control currents flowing through the motor winding sets, respectively, thereby controlling driving of a motor. The control mode includes a manual steering mode for controlling the motor according to a steering operation on a steering wheel by a driver and an automatic steering mode for controlling the motor independently of the steering operation on the steering wheel by the driver. The control units are capable of switching the control modes and differentiate the current control according to the control mode. By making the current control different according to the control mode, it is possible to attain optimal characteristics which correspond to each control mode.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: January 4, 2022
    Assignee: DENSO CORPORATION
    Inventors: Atsuko Oka, Nobuyori Nakajima, Go Endoh, Koichi Nakamura, Yosuke Ogi
  • Patent number: 11203377
    Abstract: A system and method for controlling the steering of a vehicle includes a processor, a velocity sensor in communication with the processor a steering angle sensor in communication with the processor, accelerometer in communication with the processor and a steering angle controller in communication with the processor. The processor is configured to receive the acceleration of the vehicle from the accelerometer and the velocity from the velocity sensor, determine the estimated tie-rod force utilizing the lookup table tie-rod force estimation lookup table, and instruct the steering wheel angle controller to apply an additional force substantially equal to the estimated tie-rod force to the steering torque.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: December 21, 2021
    Assignee: VEONEER US, INC.
    Inventors: Jon D. Demerly, Hsin-Hsiang Yang
  • Patent number: 11203380
    Abstract: In a steering assistance device 1, a steering control unit 74 causes a first auxiliary unit 14 to generate torque with reducing by a predetermined amount and causes a second auxiliary unit 20 to generate torque equal to or less than the decreased predetermined amount, in a case where the first auxiliary unit 14 is able to generate a steering assistance force such that a steering angle of a vehicle can reach a target steering angle determined according to curvature so as to make the vehicle travel in the center of a lane.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: December 21, 2021
    Assignee: ISUZU MOTORS LIMITED
    Inventor: Teruhiko Suzuki
  • Patent number: 11183964
    Abstract: Provided is a control device for an AC rotating electric machine, which includes: a temperature detection unit configured to detect a temperature of a protection unit provided in an object to be protected when a current is supplied from a power conversion circuit including a switching element to the AC rotating electric machine and output, as a detected temperature, one of the temperature and a temperature of the object to be protected that is estimated from the temperature; a temperature compensation unit configured to calculate, through use of the detected temperature output from the temperature detection unit, a compensated temperature equal to or higher than the detected temperature; and a torque limiting unit configured to limit, through use of the compensated temperature calculated by the temperature compensation unit, a torque command value input thereto.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: November 23, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shingo Harada, Keiichi Enoki, Tomohisa Shoda, Nozomu Kamioka, Ryosuke Shigematsu, Kazuhiko Otsuka
  • Patent number: 11167788
    Abstract: Even in the case that the steered wheels are turned by an actual turning angle due to a disturbance from the road surface, and the steering shaft, which is mechanically connected to the steered wheels, attempts to rotate, a command current to an assist motor is set so that the actual turning angle becomes a corrected target turning angle. The force (torque) that attempts to cause rotation of the steering shaft due to the disturbance input from the road surface is instantaneously canceled by the assist motor.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: November 9, 2021
    Assignee: Honda Motor Co., Ltd.
    Inventors: Soichiro Ito, Norio Yamazaki, Toshihiro Yoda
  • Patent number: 11152881
    Abstract: A control device includes: a first power converter applying a voltage to a first winding; a second power converter applying a voltage to a second winding; a first power supply circuit supplying power to the first power converter; a second power supply circuit supplying power to the second power converter; a current command calculator; a first current controller; and a second current controller. The second power supply circuit supplies power at a voltage higher than a voltage of the first power supply circuit. The current command calculator calculates a first voltage usage state, which is an indicator value correlated with a magnitude of the output voltage of the first power converter with respect to a power supply voltage output at a time of supply of power by the first power supply circuit, and calculates the second current command based on the first voltage usage state.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: October 19, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuya Tsuchimoto, Isao Kezobo, Akira Furukawa
  • Patent number: 11124227
    Abstract: A steering control device (ECU) comprises a base assist unit for generating a basic assist torque and a steering torque correction unit. The steering torque correction unit outputs a corrected steering torque, which is decreasingly corrected so that an absolute value becomes smaller than an absolute value of a steering torque when a viscous load is requested to be applied to a driver by decreasing the assist torque. The base assist unit includes a target steering torque calculation unit and a servo controller. The target steering torque calculation unit calculates the target steering torque based on a steering torque. The servo controller calculates the basic assist torque to cause the corrected steering torque to follow the target steering torque.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: September 21, 2021
    Assignee: DENSO CORPORATION
    Inventor: Takashi Aoki
  • Patent number: 11124235
    Abstract: A trailer backup assist system for motor vehicles includes an auxiliary user input feature that can be used by a vehicle operator to provide a steering curvature command corresponding to a desired vehicle path curvature without requiring a user to move a steering wheel of the motor vehicle. The trailer backup assist system is configured to control a vehicle speed while the vehicle is backing up with a trailer attached thereto utilizing an input comprising at least one of a steering curvature command and an angle of a trailer relative to the vehicle. The trailer backup assist system controls at least one of a brake system, an engine torque, and a transmission gear selection to thereby control vehicle speed in a reverse direction.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: September 21, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Erick Michael Lavoie, Nathaniel A Rolfes, Bradley G. Hochrein, Darrel Alan Recker, Donald Jacob Mattern, Michael Hafner
  • Patent number: 11117613
    Abstract: A power assist device for supporting steering of a motor vehicle includes a steering column shaft and a housing. The shaft has a rotor and the housing has a stator. The stator is arranged in the radial direction with respect to the rotor. The rotor is a disk, and at least one magnet is arranged on the radially outer edge of said rotor.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: September 14, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Michael Georg Figura, Alexander Ein Waldt, Armin Schymczyk
  • Patent number: 11117612
    Abstract: Technical solutions are described for attenuating dither noise in a steering system. An example method includes computing multiple filter parameters, each filter parameter based on a corresponding signal in the steering system. The method further includes determining at least one final filter parameter from the plurality of filter parameters by arbitrating the plurality of filter parameters. The method further includes dynamically configuring a filter using the at least one final filter parameter. Further, the method includes filtering a motor torque command using the filter, a filtered motor torque command being applied to a motor to generate a corresponding amount of torque.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: September 14, 2021
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Prerit Pramod, Michael Eickholt, Krishna MPK Namburi, Matthew A. Tompkins
  • Patent number: 11110955
    Abstract: An electric steering device includes a motor and a control circuit. The motor applies a steering force to a steering mechanism of a vehicle. The control circuit includes an inverter that converts DC power of a DC power supply to AC power and supplies the AC power to the motor, and a power supply relay that permits or blocks a current flow to the motor through the inverter. In the control circuit, the power supply relay is provided on a ground line connecting the inverter and a ground.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: September 7, 2021
    Assignee: DENSO CORPORATION
    Inventor: Syuhei Miyachi
  • Patent number: 11091196
    Abstract: A servo controller calculates a base assist torque so that a steering torque follows a target steering torque. A convergence control calculation unit provided as a correction control calculation unit calculates a correction control value in accordance with a steering speed which is a steering state value. A torque converter outputs a torque limit value determined by converting a current limit value into a torque to a servo limit value calculation unit. The servo limit value calculation unit calculates the servo limit value so that an absolute value of the servo limit value to be larger than an absolute value of the torque limit value in at least a part of a region of the steering speed or the correction control value.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: August 17, 2021
    Assignee: DENSO CORPORATION
    Inventor: Motoaki Kataoka
  • Patent number: 11084525
    Abstract: Provided is an electric power steering control device capable of improving steering feeling. When the voltage of a battery is within the range of usual voltage, a gain target value is set to a usual value, and when the voltage of the battery is outside the range thereof, the gain target value is set to a value below the usual value. Then, it is determined whether or not a set gain at recovery of the voltage of the battery from outside the range of the usual voltage to within the range thereof is larger than a prescribed threshold. When determined to be larger than the prescribed threshold, the gain is set to immediately increase up to the gain target value, whereas when determined to be equal to or less than the prescribed threshold, the gain is set to gradually increase up to the gain target value.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: August 10, 2021
    Assignee: NSK LTD.
    Inventors: Tsutomu Shibata, Takamitsu Koukami
  • Patent number: 11046357
    Abstract: A method for assembling a rack-and-pinion steering gear may involve introducing a steering pinion into a housing opening of a steering gear housing such that a region of a narrowed portion of a pinion shaft is situated at a level of a rack to be inserted, introducing the rack into the housing opening of the steering gear housing such that the rack is pushed past the narrowed portion of the pinion shaft into a setpoint position, and moving the pinion shaft farther into the steering gear housing to an end position such that a toothing region of the rack enters into engagement with a toothing of the steering pinion.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: June 29, 2021
    Assignees: thyssenkrupp Presta AG, thyssenkrupp AG
    Inventors: Philippe Steck, Patrick Baumgartner
  • Patent number: 11046300
    Abstract: A method for a steering control of a vehicle to improve steering restoration when the vehicle escapes from a turn path via acceleration during high-speed turning. The vehicle steering control method includes determining whether or not a vehicle is rapidly accelerating in a high-speed turning state, and providing a restoration compensation torque in a vehicle steering restoration direction using a steering motor when it is determined that the vehicle is rapidly accelerating in the high-speed turning state. In particular, the restoration compensation torque is determined based on a relationship of a steering torque, a wheel speed, a number of revolutions of an engine, and a steering angular speed of the vehicle.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: June 29, 2021
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Dae Suk Jung
  • Patent number: 11014603
    Abstract: An ECU of a vehicle controls a motor on the vehicle. The ECU includes a microcomputer and a monitoring circuit. The monitoring circuit includes a rotation detection circuit that detects the number of rotations of the motor at a preset sampling interval, a control circuit including a logic circuit that controls an operation of the rotation detection circuit, and an inspection circuit that inspects of the control circuit. The microcomputer is started upon start of vehicle power supply and performs a specific process using the number of rotations of the motor detected by the rotation detection circuit. The inspection circuit performs the inspection of the control circuit in the monitoring circuit in a period in which the microcomputer is kept in a reset state after the vehicle power supply is turned on and which is within a sampling interval of the rotation detection circuit in the monitoring circuit.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: May 25, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Kenichi Kozuka, Masato Oda
  • Patent number: 11014601
    Abstract: An electric power steering apparatus including: a steering torque detector to detect a steering torque of a driver; a motor to assist a steering force of the driver; an estimated speed calculator to calculate an estimated speed, which is an estimated value of a rotation speed of the motor; an estimated speed corrector to correct the estimated speed based on the steering torque; an estimated angle calculator to calculate an estimated angle of the motor by integrating the estimated speed after the correction; and an electric power supply to supply electric power to the motor based on the estimated angle, wherein the estimated speed corrector corrects the estimated speed when a determination signal, which is based on a value obtained by removing a frequency component of steering of the driver from a derivative of the steering torque, the steering torque, and the estimated speed have the same signs.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: May 25, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuya Tsuchimoto, Isao Kezobo, Akira Furukawa, Yuji Takatsuka
  • Patent number: 10994781
    Abstract: Disclosed is an automatic adjustment system for a steering wheel provided in a process line to support wheel alignment operation of a vehicle mounted with an OBD, includes a scanner for recognizing a vehicle identification number entered into the process line; an antenna that connects the OBD of the vehicle with the wireless diagnosis communication to transmit and receive data; a robot moves a vision sensor mounted on the front end portion thereof to the shooting position of the steering wheel in the vehicle through the attitude control, when the vehicle is seated in a centering position; and a control apparatus that analyzes the shooting image of the vision sensor to calculate the current distorted angle of the steering wheel and initialize by inputting the current distorted angle of the steering wheel to the steering angle sensor via the diagnosis communication connected with the OBD of the vehicle.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: May 4, 2021
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Su Jin Youn
  • Patent number: 10942075
    Abstract: A method for determining a driver's manual torque at a steering wheel of a vehicle which includes sensing a steering angle speed by a steering angle sensor, sensing a steering torque by a steering torque sensor at a steering column connected to the steering wheel, estimating a driver's manual torque applied by a driver at the steering wheel based on the sensed steering angle speed and the sensed steering torque by a Kalman filter by a controller, wherein during the estimation of the driver's manual torque a frictional torque is considered, and the frictional torque is estimated based on the steering torque which is sensed by the steering torque sensor, wherein the estimated frictional torque is taken into account as an interference factor during the estimation of the driver's manual torque in the Kalman filter. Also disclosed is an associated device.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: March 9, 2021
    Inventors: Hendrik Oschlies, Falko Saust, Michael Rohlfs
  • Patent number: 10933907
    Abstract: The present invention includes: first to fourth Hall elements for detecting steering torque; a first power supply circuit for supplying power to the first and second Hall elements; a second power supply circuit for supplying power to the second and third Hall elements; and a control device including a first abnormality determining unit for determining whether first and fourth torque signals are abnormal by preparing the first torque signal output from the first Hall element with the fourth torque signal output from the fourth Hall element and a second abnormality determining unit for determining whether second and third torque signals are abnormal by comparing the second torque signal output from the second Hall element with the third torque signal output from the third Hall element. With this, even when abnormality occurs in one of the first and second power supply circuits, the abnormality determination of an output signal can be continued.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: March 2, 2021
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Teruyuki Ohnishi, Makoto Kimura
  • Patent number: 10926793
    Abstract: Methods for estimation of lost temperature increment after system restart for motor coil temperature estimation in an electric power steering apparatus of a motor vehicle with a power pack including an ECU with a temperature sensor and an electric motor. The methods allow to easily recover the lost heat increment value after restart of the system. Consequently, the estimation of the temperature of the motor coils will start from the correct temperature value. Damage of the motor due to overheat can be prevented. Further a more robust system diagnostics and a more accurate torque signal estimation can be provided.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: February 23, 2021
    Assignees: thyssenkrupp Presta AG, thyssenkrupp AG
    Inventor: István Szalmás
  • Patent number: 10919567
    Abstract: An electric power steering apparatus that drives a motor based a current command value and assist-controls a steering system by a driving-control of the motor. The apparatus includes a handle-returning control section that calculates a target steering angular velocity by using a steering angle, the vehicle speed, the steering torque and the current command value, calculates a handle-returning control current by using a limit-target steering angular velocity which is obtained by limiting the target steering angular velocity depending on steering angular velocity, and drives the motor by a compensated current command value which is obtained by adding the handle-returning control current to the current command value.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: February 16, 2021
    Assignee: NSK LTD.
    Inventors: Tetsuya Kitazume, Satoshi Shimokawabe
  • Patent number: 10919558
    Abstract: A steering apparatus for a vehicle includes: a steering wheel comprising a shaft coupler connected to an upper steering shaft of a vehicle, and a first grip member and a second grip member disposed on the shaft coupler; a steering column having the upper steering shaft therein and connected with the shaft coupler to change the axial length thereof in accordance with driving modes; and a controller rotating at least one of the first grip member, the second grip member, and the shaft coupler, depending on the driving modes.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: February 16, 2021
    Assignee: MANDO CORPORATION
    Inventors: Suk Hee Lee, Woo Jin Shin
  • Patent number: 10924046
    Abstract: A motor driven power steering apparatus includes a steering logic unit for generating a current command to operate a drive motor according to a driving condition of a vehicle, a motor speed sensor for sensing a rotation condition of the drive motor to output a motor speed, a motor control unit for receiving the current command and the motor speed from the steering logic unit and the motor speed sensor, respectively, and calculating an output voltage from a voltage table according to current-speed based on the current command and the motor speed to output a voltage command to operate the drive motor, a coordinate conversion unit for converting the two-phase voltage command outputted from the motor control unit into a three-phase voltage, and a motor driving unit for outputting the three-phase voltage converted from the coordinate conversion unit to the drive motor as a PWM voltage.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: February 16, 2021
    Assignee: Hyundai Mobis Co., Ltd.
    Inventors: Moon Su Kim, Ji Hoon Yoo
  • Patent number: 10913495
    Abstract: Technical solutions described herein include a steering system that includes a motor that generates assist torque, and a controller that generates a motor torque command for controlling an amount of the assist torque generated by the motor. The steering system further includes a remote object assist module that computes a steering intervention based on a proximity of a vehicle from a detected object. The controller changes the motor torque command using the steering intervention.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: February 9, 2021
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Jian Sheng, Tejas M. Varunjikar, Farhad Bolourchi
  • Patent number: 10908624
    Abstract: A method of managing over-temperature excursions in an electronic control unit of a control system having failed-fixed capability and an operationally independent temperature monitoring and power enable function. The method includes receiving a temperature signal indicative of a temperature associated with an electronic control unit, determining if the temperature associated with the electronic control unit exceeds a first selected threshold, determining if the temperature associated with the electronic control unit exceeds a second selected threshold, and ascertaining if an engine associated with the control system is operational. The method also includes that if the engine is not operational and the temperature exceeds the first selected threshold, then disabling an actuator associated with the control system.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: February 2, 2021
    Assignee: HAMILTON SUNSTRAND CORPORATION
    Inventors: Edward John Marotta, Geoffrey T. Blackwell, James A. Gosse
  • Patent number: 10890895
    Abstract: In described examples of methods and control systems to control a position and/or velocity of a machine, control circuitry is coupled to receive and dither a control signal, and to compute a control output value according to the dithered control signal and a control function. An inverter is coupled to the control circuitry, to control the position and/or velocity according to the control output value.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: January 12, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Rajan Lakshmi Narasimha, David Patrick Magee
  • Patent number: 10882550
    Abstract: An electric power steering apparatus includes a function to switch a control system of the motor between a torque control system of a torque system to control a motor output torque and a position and speed control system of a steering angle system to control a steering angle of a steering in accordance with an ON/OFF of a post-diagnosis automatic steering command being a judgment result of an automatic steering execution judging section; and a characteristic calculating section to calculate a fade gain signal F1 that applies a first fade characteristic of the torque system, a fade gain signal F2 that applies a second fade characteristic of the steering angle system, and a fade gain signal F3 that applies a third fade characteristic of the steering angle speed, sensitive to the steering torque.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: January 5, 2021
    Assignee: NSK LTD.
    Inventors: Ryo Minaki, Takayoshi Sugawara, Hideki Sawada
  • Patent number: 10875617
    Abstract: A hydraulic steering system for vehicles includes a steering control member; a hydraulic pump provided with a rotatable driving shaft on which the control member is fitted; a hydraulic actuating cylinder connected with two ports of the pump alternately operating as delivery side and return side of the pump and mechanically connected with a direction changing member, which determines a change in the direction by modifying orientation via an actuating cylinder as a function of the supply of hydraulic fluid to the cylinder from the pump by the steering control member. The driving shaft is dynamically connected with an electric motor/transmission assembly, which is activated alternatively by generating a rotational force auxiliary to the movement manually exerted on the steering control member or opposing the manually exerted movement, or by driving to rotate the driving shaft of the pump in place of the manual action driving the steering control member.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: December 29, 2020
    Inventors: Marcella Gai, Enrico Pagani
  • Patent number: 10858039
    Abstract: A steering control unit includes a microcomputer that controls the driving of a motor on the basis of a steering torque to cause the motor to produce an assist force that is supplied to a steering mechanism as power to steer front wheels. The microcomputer calculates, on the basis of the steering torque, an assist component indicative of the assist force that the motor needs to produce. The microcomputer obtains vertical forces related to the front wheels that are calculated by hub units that rotatably support the front wheels and have front wheel sensors for detecting forces applied to the front wheels. The microcomputer compensates the assist component by using the obtained vertical forces, to reduce a change in load on a driver that is caused when vertical loads on the front wheels change.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: December 8, 2020
    Assignee: JTEKT CORPORATION
    Inventor: Akihiko Nishimura