Condition Modulated Patents (Class 180/446)
  • 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: 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: 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
  • Patent number: 10836422
    Abstract: A method for operating an electric power steering system of a motor vehicle, wherein a steering wheel angle is specified by a steering handle as a measurement for a desired wheel steering angle for at least one steerable wheel of the motor vehicle, wherein an electric servo drive having an electric motor provides steering assistance, and wherein an additional restoring force is provided to compensate for increased internal friction in the power steering system based upon temperature, wherein the additional restoring force is reduced based upon a desired steering direction that is detected at the steering handle. Also disclosed is an associated electric power steering system, an associated computer program, and an associated control unit.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: November 17, 2020
    Assignee: Volkswagen AG
    Inventors: Jens Zientek, Johannes Maria Schäfer
  • Patent number: 10829151
    Abstract: A method for distinguishing intentional steering movements of a driver for influencing an intentional driving path of a motor vehicle from corrective steering movements of the driver as a reaction to unexpected deviations of the motor vehicle from the intentional driving path including ascertaining an instantaneous undisturbed motion of the vehicle along the driving path and calculating a reference value for a steering angle (SAR) corresponding to the ascertained, undisturbed motion of the motor vehicle or a reference value for a steering velocity (SVR) corresponding to the ascertained, undisturbed motion of the motor vehicle.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: November 10, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Michael Schiebahn, Peter W. A. Zegelaar, Helmuth Bosch
  • Patent number: 10826423
    Abstract: A motor driving apparatus includes a first driving control circuit (an MCU, a driving circuit, an input circuit, a power management IC) and a second driving control circuit (an MCU, a driving circuit, an input circuit, a power management IC). The first driving control circuit and the second driving control circuit are configured to drive a corresponding winding group of winding groups of a motor, and have a master mode for outputting a synchronous trigger signal in synchronization with driving of the corresponding winding group and a slave mode for synchronizing the driving of the corresponding winding group with an input synchronous trigger signal. When an error has occurred in an operation of the first driving control circuit in the master mode, the second driving control circuit switches an operation mode of the second driving control circuit from the slave mode to the master mode.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: November 3, 2020
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Hiroaki Kawai, Shunsuke Nakano
  • Patent number: 10787197
    Abstract: A steering control apparatus includes a microcomputer configured to control driving of a motor based on a steering torque so as to generate, for a steering mechanism, an assist force as power for turning front wheels. The microcomputer calculates an assist component indicating the assist force to be generated in the motor based on the steering torque, acquires steered moments about axes extending in a vertical direction of the front wheels from hub units that rotatably support the front wheels and include front wheel sensors configured to detect forces applied to the front wheels, respectively, and compensates for the assist component by using the acquired steered moments so as to generate, in the motor, a vibration suppressing force for suppressing a reverse input vibration.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: September 29, 2020
    Assignee: JTEKT CORPORATION
    Inventor: Akihiko Nishimura
  • Patent number: 10780913
    Abstract: A method of controlling a motor of an electric power assisted steering system, the motor having a plurality of phases, the method comprising taking as an input an input signal indicative of a desired assistance torque and determining from the desired assistance torque a voltage to be applied to each of the phases of the motor, in which the step of determining the voltage to be applied to each of the phases comprises limiting the voltage determined to be applied to each of the phases of the motor dependent upon the voltage provided by a power supply to the motor.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: September 22, 2020
    Assignee: ZF Automotive UK Limited
    Inventors: Christopher David Dixon, Connel Brett Williams, Birk Junghanns
  • Patent number: 10759471
    Abstract: The power steering device is configured to: apply a required assist force only from a first electric motor until a predetermined period elapses, which is a period from a time point at which a driver starts steering to a time point at which a second-electric-motor drive start condition, which is a condition for starting drive of a second electric motor, is satisfied; when the predetermined period has elapsed, apply the required assist force from the first electric motor and a hydraulic actuator; and adjust an assist force by the first electric motor so that the assist force by the first electric motor is a value obtained by subtracting an assist force by the hydraulic actuator from the required assist force. As a result, the device can be downsized, and a sufficient required assist force can be generated from an initial stage of the steering.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: September 1, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Masao Ueyama
  • Patent number: 10752286
    Abstract: The present invention relates to a steering control apparatus and a steering control method for removing an inwardly caused disturbance or outwardly caused disturbance with respect to a vehicle. It is possible to efficiently remove a disturbance of a steering control apparatus which is generated due to various causes by: confirming a disturbance cause based on estimated frequencies estimated based on three factors that affect the steering control apparatus (i.e., a first estimated frequency estimated based on the estimation of a rack force, a second estimated frequency estimated based on a steering torque signal, and a third estimated frequency estimated based on a vehicle wheel rotational speed); then determining a compensation rate, which varies depending on whether the disturbance is an internally caused disturbance or an externally caused disturbance; and then applying the compensation rate to a steering current value.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: August 25, 2020
    Assignee: MANDO CORPORATION
    Inventor: Sang Jin Ko
  • Patent number: 10737716
    Abstract: A steering control method for a vehicle, may include determining, by a controller, whether or not a vehicle is in a high-speed turning driving condition based on factors reflecting a driving state of the vehicle; determining, by the controller, whether or not a rapid acceleration is occurring in the vehicle when the controller determines that the vehicle is in the high-speed turning driving condition; and providing, by the controller, restoration compensation torque to a steering restoration direction of the vehicle by use of a steering motor when the controller determines that the rapid acceleration is occurring.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: August 11, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Dae Suk Jung
  • Patent number: 10720863
    Abstract: An electric power tool may include a three-phase brushless motor configured to drive a tool, a gear reducer provided between the motor and the tool. The gear reducer is configured to selectively change a reduction ratio from the motor to the tool between a first reduction ratio and a second reduction ratio. The electric power tool may further include a motor controller configured to drive the motor with rectangular waves. The motor controller is configured to selectively change a conduction angle of each rectangular wave between at least a first conduction angle and a second conduction angle.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: July 21, 2020
    Assignee: MAKITA CORPORATION
    Inventors: Itsuku Kato, Katsuna Hayashi, Kouichi Takeda, Hidenori Nagasaka, Takeshi Kamiya
  • Patent number: 10703405
    Abstract: A steering control device that can more appropriately transmit a road-surface reaction force to a steering wheel is provided. The steering control device feedback controls a steering angle to a target steering angle that is a target value of the steering angle. The steering control device includes an estimated axial force computation circuit that computes an estimated axial force so as to reflect a road-surface reaction force in a reaction force generated by a reaction force actuator. The estimated axial force computation circuit computes the estimated axial force by causing a friction compensation amount computation circuit and an efficiency compensation gain computation circuit to compensate an initial estimated axial force computed by an initial estimated axial force computation circuit.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: July 7, 2020
    Assignee: JTEKT CORPORATION
    Inventor: Takashi Kodera
  • Patent number: 10703406
    Abstract: A method in a vehicle for determining road properties is described. The method includes: acquiring vehicle acceleration in x, y and z directions; acquiring a rack force; acquiring a wheel speed for each of all four wheels; determining a wheel speed energy based on the wheel speed; determining a wheel slip of all four wheels of the vehicle based on a respective wheel speed of the wheel; determining an acceleration energy in each of the x, y and z-directions based on the vehicle acceleration and the vehicle speed; determining a rack force energy based on the detected rack force; and determining road properties based on the wheel speed energy, rack force energy and vehicle speed. A system is also described for performing the method.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: July 7, 2020
    Assignee: VOLVO CAR CORPORATION
    Inventors: Henrik Gullven, Tony Gustafsson, Mats Skold
  • Patent number: 10689028
    Abstract: An apparatus and method for controlling an MDPS system may include an information detection device configured to detect information for steering assistance and pull-compensation control; an MDPS basic logic device configured to determine a steering-assist control value from the detected information; a state determination device configured wherein whether conditions corresponding to a non-steering state, a straight-driving state, a deceleration state, and a state in which pulling of the vehicle occurs are satisfied is determined based on the detected information; a compensation logic device configured wherein when the conditions are satisfied, a pull-compensation control value is determined from the detected information using stored configuration information and a control target value is determined using the steering-assist control value and the pull-compensation control value; and a motor control logic device configured to control an operation of a steering motor depending on the control target value.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: June 23, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Dae Suk Jung
  • Patent number: 10673308
    Abstract: A drive motor in which a torque sensor is arranged on an outer circumference of a shaft, includes a rotor, a rotor shaft arranged inside the rotor, and an output shaft that is joined to the rotor shaft by a spline joint and outputs rotational force of the rotor shaft to the output side. The torque sensor is arranged on an output side of the spline joint in a range not overlapping with the spline joint.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: June 2, 2020
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yutaka Arimura, Daisuke Hoshino, Tatsuya Ohzu, Shingo Soma, Yosuke Tanaka
  • Patent number: 10668948
    Abstract: A vehicle steering device includes a steering wheel, an input shaft, an output shaft coupled to the input shaft via a torsion bar, an electric motor, a torque detector that detects a torsion bar torque applied to the torsion bar, a rotational angle detector that detects a rotational angle of the electric motor, and a microcomputer. The microcomputer is configured to estimate a driver torque applied to the steering wheel using at least (i) the torsion bar torque detected by the torque detector, (ii) the rotational angle of the electric motor detected by the rotational angle detector, and (iii) a physical model that is constructed with a torsion bar viscosity and a torsion bar rigidity, and determine whether the steering wheel is operated in a hands-on state or a hands-off state based on the estimated driver torque.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: June 2, 2020
    Assignee: JTEKT CORPORATION
    Inventors: Frederic Wilhelm, Tsutomu Tamura, Robert Fuchs, Maxime Moreillon
  • Patent number: 10670658
    Abstract: The invention relates to an arrangement for identifying an electrical line interruption during operation of a drive system (20), which comprises two parallel-connected DC motors (21, 41), which are mechanically coupled to one another by means of a part that is to be driven, a driver for driving the two parallel-connected DC motors (21, 41) and a measuring device for detecting different electrical variables of the drive system (20). The measuring device comprises a rotational speed determination apparatus (32) for determining the rotational speed of the two DC motors (21, 41) and for supplying a piece of rotational speed information representing the rotational speed.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: June 2, 2020
    Assignee: Conti Temic microelectronic GmbH
    Inventor: Erwin Kessler
  • Patent number: 10661824
    Abstract: A steering system with a reduced number of parts is provided. A driven pulley has a radially outer portion, a radially inner portion, and a connection portion that connects the radially outer portion and the radially inner portion to each other. The radially inner portion is provided with a plurality of slits at equal intervals in the circumferential direction. A plurality of retention portions are provided at portions of the radially inner portion between the slits. Lug portions are provided on the inner surface of the distal ends of the retention portions. A groove is provided in the outer peripheral surface of a ball screw nut. The lug portions of the retention portions are fitted with the groove of the ball screw nut.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: May 26, 2020
    Assignee: JTEKT CORPORATION
    Inventors: Toshihiro Asakura, Takuya Nakayama
  • Patent number: 10647346
    Abstract: A worm shaft (46) has a first end section (52) and a second end section (54) extending from a worm section (50). A first drive system (98) is in driving engagement with the first end section (52) of the worm shaft (46), and a second drive system (104) is in driving engagement with the second end section (54) of the worm shaft (46) for redundantly steering a vehicle. The worm section (50) of the worm shaft (46) is disposed between the first drive system (98) disposed on the first end section (52) of the worm shaft (46) and the second drive system (104) disposed on the second end section (54) of the worm shaft (46). A lost motion connection (82) is disposed between an input shaft (76) and said worm shaft (46).
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: May 12, 2020
    Assignee: CHINA AUTOMOTIVE SYSTEMS, INC
    Inventors: Haimian Cai, Tianyi Qiu, Siqi Zuo
  • Patent number: 10618551
    Abstract: A steering mechanism having a piezoelectric element to adjust component clearance and preload based on steering inputs, road inputs, and time in service. The piezoelectric element positioned in the steering mechanism for electric adjustment so that the clearance and preload can be adjusted electrically in response to steering inputs, road inputs, and time in service. This arrangement allows for low preload and low friction when the vehicle is being driven over smooth road conditions. When a rough road condition is detected both clearance and preload can be electrically increased to minimize noise. The disclosed inventive concept may find application in a variety of steering mechanisms to minimize or eliminate NVH when the vehicle is driven over rough surfaces. Without limitation, the piezoelectric element may be provided in rack and pinion electric power assisted steering systems or in worm and wheel (steering column) electric power assisted steering systems.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: April 14, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Timothy Gerard Offerle, Michael Puleri
  • Patent number: 10604184
    Abstract: A system for assisting in reversing of a vehicle-trailer combination includes a vehicle steering system and a controller. The controller outputs a steering signal based on a control parameter to the steering system to maintain the trailer along a commanded backing path, determines an error between a measured behavior of a characteristic of the vehicle-trailer combination and a predicted behavior of the characteristic, and adjusts the control parameter based on the error.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: March 31, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Donald Jacob Mattern, Brian George Buss, Joseph M. Raad, Tyler Daavettila
  • Patent number: 10601301
    Abstract: An abnormality detection device includes a detection circuit unit, a protection circuit unit, and an abnormality determination unit. The detection circuit unit includes: a voltage detection circuit and a current detection circuit that generate, as analog signals, detection values indicating a current and a voltage at a predetermined position of a vehicle-mounted power supply device. An A/D converter converts the detection value into a digital signal. The protection circuit unit performs a predetermined protection operation on the vehicle-mounted power supply device if a voltage or a current of an input path or an output path of a voltage converting unit has an abnormal value. The abnormality determination unit makes at least one of the detection circuit unit and the protection circuit unit perform a predetermined diagnosis operation, and determines, based on a result of the diagnosis operation, whether the detection circuit unit and the protection circuit unit is abnormal.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: March 24, 2020
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventor: Noriko Terada
  • Patent number: 10597070
    Abstract: Embodiments discussed herein enable detection of traction steer using measured and expected values of steering system data, such as, for example and without limitation, motor current, motor torque, motor position, motor velocity, steering wheel angle, and steering column torque. In some embodiments, the measured steering system data is compared to expected signal values, based on vehicle operating conditions, to determine if the vehicle is experiencing a traction steer event. In some embodiments, using known relationships between two or more steering system signals, a traction steer event is identified if an unexpected relationship is determined.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: March 24, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: David T. De Carteret, Gregory K. Peterson
  • Patent number: 10589784
    Abstract: Systems and methods for an imaging system having a memory with a historical localization dictionary database having geo-located driving image sequences, such that each reference image is applied to a threshold to produce a binary representation. A sensor to acquire a sequence of input images of a dynamic scene. An encoder to determine, for each input image in the sequence, a histogram of each input image indicating a number of vertical edges at each bin of the input image and to threshold the histogram to produce a binary representation of the input image. A visual odometer to compare the binary representations of each input image and each reference image, by matching an input image against a reference image. Wherein the visual odometer determines a location of the input image based on a match between the input image and the reference image.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: March 17, 2020
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Uros Kalabic, Karl Berntorp, Stefano Di Cairano
  • Patent number: 10589702
    Abstract: An object is identified by an on-board camera and a relative speed of the vehicle and the object is acquired. If the object is a two-wheel vehicle and the relative speed is lower than the vehicle speed, the relative speed is set as a collision speed. If the object is an object other than a two-wheel vehicle, the vehicle speed is set as the collision speed. Using the set collision speed, an effective mass is computed and collision determination is executed.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: March 17, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Sotaro Narita
  • Patent number: 10583859
    Abstract: When the state where steering torque detected by a torque detection unit is normal and the value of the steering torque is the same as or larger than a threshold value continues, an assist command generation unit that generates an assist command corresponding to steering torque produced by a driver limits the assist command; a failure determination unit includes a first failure determination unit that performs determination on a failure regardless of the limitation of the assist command and a second failure determination unit that performs determination on a failure while the assist command is limited, and stops driving of a motor when the second failure determination unit determines that there exists a failure.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: March 10, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuya Tsuchimoto, Isao Kezobo, Shunsuke Nakajima
  • Patent number: 10569703
    Abstract: A steering wheel includes a gripping portion that is gripped by a driver when a conveyance is steered, a light source that is disposed inside the gripping portion and is configured to emit light, a light guide body that is disposed inside the gripping portion such that an end portion of the light guide body faces the light source, the light guide body including an emission surface that is configured to emit light from the light source and incident on the end portion and that is formed on a surface on a driver side, and a covering portion that surrounds the light guide body and forms an outer layer portion of at least a part of the gripping portion around the light guide body. The covering portion is formed with a hole, through which light emitted from the emission surface passes.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: February 25, 2020
    Assignee: TOYODA GOSEI CO., LTD.
    Inventors: Shunsuke Kamei, Yoshio Mizuno, Hayato Abo
  • Patent number: 10562561
    Abstract: An embodiment of a method of controlling one or more components of a vehicle includes receiving a reference steering command and one or more measurement signals related to a steering system of a vehicle, and estimating, by a processing device, a state of the steering system based on the one or more measurement signals, the steering system including at least a handwheel and a steering motor. The method also includes determining a maximum state achievable by the steering system at one or more times subsequent to receiving the one or more measurement signals, and controlling, by a control module, the steering system based on the steering reference command and the maximum state.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: February 18, 2020
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Qi Wang, Xingye Zhang, Tejas M. Varunjikar, Anthony J. Champagne
  • Patent number: 10566920
    Abstract: A control device for an AC rotary machine includes an AC rotary machine having x-phase windings where x is at least three, an angle detector, a current detector, a voltage command calculator, and a power converter, wherein, when a current of at least one phase of the x phases is detectable and currents of at most (x?1) phases are undetectable at a present current detection timing, the current detector estimates the currents of the (x?1) phases that are undetectable at the present current detection timing by calculation on the basis of detected currents of x phases obtained at a past current detection timing, the detected current of the single phase that is detectable at the present current detection timing, and an angle variation amount from the past current detection timing to the present current detection timing.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: February 18, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventor: Akira Furukawa
  • Patent number: 10556619
    Abstract: In a steering control apparatus, a basic assistance torque calculating unit calculates a basic assistance torque. A return control unit calculates a return control amount to assist in returning a steering wheel to a neutral position, as a correction torque to be added to the basic assistance torque. In the return control unit, a target steering speed calculating unit calculates a target steering speed being that is a target value for a steering speed. A return control amount calculating unit calculates the return control amount such that the steering speed follows the target steering speed. A returning state determining unit determines whether the steering wheel is turning or returning. The target steering speed calculating unit gradually increases an absolute value of the target steering speed from an absolute value of the steering speed when the steering wheel is returning.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: February 11, 2020
    Assignee: DENSO CORPORATION
    Inventor: Takashi Aoki
  • Patent number: 10556620
    Abstract: An apparatus for compensating for a column torque in an MDPS (Motor Driven Power Steering) system including: a column torque sensor configured to sense a column torque applied to a steering shaft and output a column torque signal; a vehicle velocity sensor configured to sense a vehicle velocity; and a controller configured to receive the column torque signal to extract a vibration frequency of steering vibration caused in a steering apparatus, determine a filtering gain based on the vehicle velocity sensed by the vehicle velocity sensor, and filter the column torque signal such that a column torque signal corresponding to the extracted vibration frequency is attenuated to an attenuation length which is determined according to the filtering gain.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: February 11, 2020
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Tae Hong Kim
  • Patent number: 10549775
    Abstract: A method for estimating the ageing of a steering mechanism during which the ageing of the steering mechanism is assessed by calculating a value called «ageing value» according to an ageing function (old, old2, ene) which corresponds to the integral, over time, of an expression which is weighted by a stress indicator (Tm(u), Ts(u)) the value of which at each considered instant (u) is representative of the intensity of a stress force (Tm, Ts), such as the operating force exerted by the assist motor, which is undergone by the steering mechanism at the considered instant.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: February 4, 2020
    Assignee: JTEKT EUROPE
    Inventors: Sébastien Bourdrez, Pascal Moulaire, Romaric Pregniard, Christophe Ravier
  • Patent number: 10538267
    Abstract: An embodiment of a system of a vehicle includes a power steering system that operates as commanded by control commands, and a control module configured to receive a first control command. The control module is also configured to generate a range signal indicative of a range of command values based on a plurality of input signals, generate a second control command based on a subset of the plurality of input signals, determine whether the first control command is out of the range for longer than a predetermined duration of time, and send the second control command to the power steering system in response to determining the first control command is out of the range for longer than the predetermined duration of time.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: January 21, 2020
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Scott A. Millsap, Ashok Chandy, Kevin L. Derry, Caroline Dannöhl, Hans-Peter Hank, Jens Schotte, Kristian Vetter
  • Patent number: 10532765
    Abstract: A control apparatus (10) for controlling a three-phase rotary machine (80) having two three-phase winding sets (801, 802) includes: two power converters (601, 602) outputting AC currents, having a same amplitude and a phase difference of (30±60×n) [deg], to the two winding sets; a harmonic component generator (20) superimposing a harmonic component on a phase current first harmonic component of a current command value; and two controllers (331, 332) calculating voltage command values for the two power converters according to the current command value. A combination of amplitudes of the phase current fifth and seventh harmonic components to reduce a peak of the phase current first harmonic component is defined as a fundamental amplitude.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: January 14, 2020
    Assignee: DENSO CORPORATION
    Inventors: Ryo Kano, Takashi Suzuki
  • Patent number: 10526009
    Abstract: An electric power steering apparatus that reduces uncomfortable feeling to a driver in steering angle control by improving followability of an actual steering angle to a target steering angle, and performs efficient damping to a vibration of a vehicle. The apparatus includes a torque control section that calculates a first motor current command value based on a steering torque and so on, a target steering angle generating section that generates a target steering angle based on vehicle information, and a steering angle control section that calculates a second motor current command value based on the target steering angle, an actual steering angle and so on, and calculates the motor current command value by the first and second motor current command values.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: January 7, 2020
    Assignee: NSK LTD.
    Inventor: Takahiro Tsubaki
  • Patent number: 10512204
    Abstract: A method, apparatus, or system of estimating vehicle heading taking GNSS antenna movement and/or mounting position into account. Measurements from the GNSS can be used to estimate GNSS antenna yaw or misalignment relative a pivot or control point, or vehicle fixed-body origin. Side-slip is either ignored or, if known, can be used to adjust the estimation of vehicle heading.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: December 24, 2019
    Assignee: AG LEADER TECHNOLOGY, INC.
    Inventors: Yakup Gunbatar, Michael Schneider
  • Patent number: 10507867
    Abstract: A system and method for generating steering commands to cancel out unwanted steering moments is disclosed. The method includes determining, by a controller of a vehicle, an amount of suspension displacement that is caused as a result of driving the vehicle on an uneven road. The suspension displacement induces an unwanted steering moment. The method also includes determining a steering angle command based at least on the amount of suspension displacement. The method also includes performing the steering angle command. Performing the steering angle command cancels out the unwanted steering moment.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: December 17, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Scott A. Bronikowski, Joshua R. Auden