Condition Modulated Patents (Class 180/446)
  • Patent number: 10442460
    Abstract: An electric power assisted steering system includes an upper column shaft connected to a steering wheel, a lower column shaft connected to road wheels, a torsion bar interconnecting the upper column shaft and the lower column shaft, and a processor that produces a torque signal indicative of torsion bar torque. An electric motor is connected to the lower column shaft, and a motor position sensor provides a motor position signal dependent on the angular position of the motor rotor that repeats after the motor rotates through an angular range. The processor determines a base motor position at start up by comparing the motor position signal with a signal from a sensor associated with the upper column shaft to determine three candidates and, during subsequent unpowered motion of the steering system rules out two candidates until only one plausible candidate for the base motor position remains.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: October 15, 2019
    Assignee: TRW LIMITED
    Inventor: James Owen Patrick Farrelly
  • Patent number: 10435071
    Abstract: If road information indicates that a first curve zone at a near side and a second curve zone at a far side that curve in different directions are continuously located in a road, a steering assist unit of a steering assist device or a steering assist circuit finishes decreasing process of decreasing the steering assist amount when the subject vehicle passes through the first curve zone earlier than a case when the subject vehicle passes through the second curve zone.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: October 8, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yuki Nakada, Hiroyuki Koibuchi, Daisuke Kondo, Yosuke Sakamoto, Yoshifumi Banno, Yuki Kizumi
  • Patent number: 10435062
    Abstract: Technical solutions are described for facilitating an electric power steering (EPS) system for providing a motor torque assist command. An example EPS system includes a first module configured to generate a regulation signal or a tuning signal based on a mode of operation of the eps system. The EPS system further includes a second module configured to generate a stability signal irrespective of the mode of operation of the eps system. The EPS system further includes a blending module configured to combine the stability signal with either the regulation signal or the tuning signal to generate an assist motor torque signal for the eps system.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: October 8, 2019
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Shrenik P. Shah, Chang Wang
  • Patent number: 10425025
    Abstract: Magnetic flux generated when a current flows through a main circuit wiring serves as disturbance of a magnetic sensor, and accurate rotor position information is obtained.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: September 24, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Takuro Kanazawa, Kimihisa Furukawa
  • Patent number: 10407091
    Abstract: An electric power steering control apparatus that assists a steering operation made by a driver with a motor includes: a target torque calculation unit calculating a target steering torque; an assist torque calculation unit calculating an assist torque which enables an actual steering torque follows close to the target steering torque according to a difference therebetween; a motor drive unit driving a motor acting on a steering system mechanism so that a steering angle of vehicle is changed according to the assist torque; and a followability change unit that detects an abnormality of a torque sensor for detecting the actual steering torque. When abnormality is detected in the torque sensor, a followability of the actual steering torque to the target steering torque controlled by the assist torque is degraded compared with a case where no abnormality is detected in the torque sensor.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: September 10, 2019
    Assignee: DENSO CORPORATION
    Inventors: Yuuichi Minamiguchi, Motoaki Kataoka
  • Patent number: 10399591
    Abstract: A system for grip-based handwheel compensation includes a net handwheel torque moment determination module that determines a net handwheel torque moment between a left grip and a right grip on a handwheel. The system also includes a filter transition compensation module that applies a filter to smooth transitions in the net handwheel torque moment as a bias compensation. The system further includes a handwheel torque compensation module that determines a grip compensated handwheel torque based on a difference between a sensed handwheel torque and the bias compensation.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: September 3, 2019
    Assignee: Steering Solutions IP Holding Corporation
    Inventor: Ashok Chandy
  • Patent number: 10399595
    Abstract: A method for managing a power steering system including at least one steering wheel and at least one assist motor, the method including a step of driver torque control, which involves evaluating a driver torque difference that corresponds to the difference between a predefined driver torque setpoint and the actual driver torque actually exerted by the driver on the steering wheel, then determining an engine torque setpoint for torque applied to the assist motor in order to reduce the driver torque difference, the driver torque setpoint being generated during a trajectory control step, which involves evaluating a trajectory difference, for example a position difference, which corresponds to the difference between a trajectory setpoint, of the position setpoint type, which depends on a reference trajectory, and the actual trajectory of the vehicle, given by the measured position of the power steering, then determining, from the trajectory difference, a driver torque setpoint intended to reduce the trajectory di
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: September 3, 2019
    Assignee: JTEKT EUROPE
    Inventors: Romain Moretti, Luc Leydier
  • Patent number: 10392047
    Abstract: A power steering control system is provided. The control system includes an actual module that determines an actual load torque associated with a vehicle chassis. A steering module generates a steering control signal based on the actual load torque.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: August 27, 2019
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Jon D. Demerly, Siddharth H. D'Silva
  • Patent number: 10385847
    Abstract: A pump for pumping fluid, wherein the pump includes a working chamber, a piston assembly configured for reciprocating within the working chamber to thereby displace fluid, a piston actuator being rigidly assembled with the piston assembly at least in a working mode of the pump to thereby transmit drive energy to the piston assembly to reciprocate along a common rigid axis of the piston-actuator-assembly, and a bearing arrangement bearing the piston assembly and the piston actuator in the pump so that the piston-actuator-assembly provided by the piston assembly and the piston actuator is capable of performing a pendulum-type compensation motion around a pendulum point at the piston actuator on the common rigid axis.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: August 20, 2019
    Assignee: Agilent Technologies, Inc.
    Inventors: Arne Kurz, Bernhard Dehmer, Lothar Mitzlaff
  • Patent number: 10377415
    Abstract: Disclosed is a method of controlling a motor driven power steering system (MDPS). The method includes multiple operations including a torque sensor failure determining operation of determining failure of the torque sensor according to existence of a torque sensor signal input from the torque sensor; a control module calculating operation of, when it is determined that the torque sensor has failure, receiving control signals from a steering angle sensor and a motor angle sensor and calculating a plurality of control modules including a basic assist generating module, an assist maintaining module, and an overshoot preventing module; and an MDPS motor driving operation of driving a motor of the MDPS based on motor torque calculated through the control module.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: August 13, 2019
    Assignee: Hyundai Motor Company
    Inventors: Jong Ho Lee, Min Woo Han, Jin Hyuck Heo, Woo Je Sung
  • Patent number: 10363941
    Abstract: A vehicle is provided including an electronic power steering system, an electronic throttle control system, and a stability control system.
    Type: Grant
    Filed: August 27, 2017
    Date of Patent: July 30, 2019
    Assignee: Polaris Industries Inc.
    Inventor: Tim P. Norstad
  • Patent number: 10363956
    Abstract: In a return control unit, a driver steering correcting unit calculates a correction amount outputted in relation to any calculation quantity in a calculation process for a return control amount, based on a steering torque and steering wheel position-related information, such that the return control amount is maintained or increased when a steering torque is applied in a returning direction towards a neutral position of a steering wheel, and the return control amount is reduced when the steering torque of which an absolute value is equal to or greater than a predetermined critical value is applied in a turning direction away from the neutral position of the steering wheel. The steering wheel position-related information is information of which a value when the steering wheel is at the neutral position is zero and the value is positive or negative based on a steering wheel position in relation to the neutral position.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: July 30, 2019
    Assignee: DENSO CORPORATION
    Inventor: Takashi Aoki
  • Patent number: 10358161
    Abstract: A steering controller that controls a motor to output an assist torque to steer a steering member, including a steer property calculator calculating a steer state quantity that is an index of a steering state indicating one of (i) a steer-away state, (ii) a steer-back state, or (iii) a stay-still state, an adjusted torque calculator calculating an adjusted torque based on the steer state quantity, and an instruction value calculator calculating an assist torque instruction that is an instruction value regarding a drive of the motor by using the adjusted torque. In such manner, the steer state quantity, the steer-back operation, the stay-still operation of a steering wheel, and the adjusted torque are appropriately calculated, thereby enabling an appropriate adjustment of a steering feel.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: July 23, 2019
    Assignee: DENSO CORPORATION
    Inventors: Takashi Aoki, Motoaki Kataoka, Yosuke Hirate
  • Patent number: 10358164
    Abstract: A vehicle steering device includes a driver torque estimation unit that includes a driver torque estimation observer, a low-pass filter, and a hands-on/off determination unit. The driver torque estimation observer estimates driver torque applied to a steering wheel by a driver on the basis of a detected value that includes at least torsion bar torque detected by a torque sensor and the rotational angle of an electric motor detected by a rotational angle sensor. The low-pass filter performs a low-pass filtering process on the estimated driver torque. The hands-on/off determination unit determines whether in a hands-on state or a hands-off state on the basis of the driver torque after being subjected to the low-pass filtering process.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: July 23, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Frederic Wilhelm, Tsutomu Tamura, Robert Fuchs, Maxime Moreillon
  • Patent number: 10355630
    Abstract: An object of the invention is to correct a variation of a gain of a current sensor without causing an increase in size and a high cost of an inverter control device. An inverter control device according to the invention includes a 3-phase/dq-axis conversion unit which converts the output current detected by a current sensor into a dq-axis current and a gain adjustment unit which adjusts a detection gain of the current sensor for each phase. In a case where a current value of a secondary harmonic component contained in the dq-axis current is equal to or more than a predetermined threshold, the gain adjustment unit corrects the gain of the current sensor such that the current value of the secondary harmonic component becomes less than the threshold.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: July 16, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Hiroshi Tamura, Hiroyuki Yamada, Shigeyuki Nonomura, Hirokazu Matsui
  • Patent number: 10343711
    Abstract: A tuning device of an electric power steering apparatus assisting steering based on the correspondence relationship between a steering torque and a steering auxiliary command value according to the steering torque. The tuning device receives a plurality of candidate points represented by a steering torque and a candidate value of the steering auxiliary command value according to the steering torque, calculates a high order polynomial approximating the plurality of candidate points, calculates a plurality of adjustment points, the number of which is larger than the plurality of candidate points and which are represented by the steering torque and the steering auxiliary command value according to the steering torque, based on the high order polynomial, calculates a plurality of linear functions connecting two adjacent points in the plurality of adjustment points, and outputs information on the plurality of linear functions in order to adjust the correspondence relationship.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: July 9, 2019
    Assignee: NSK LTD.
    Inventors: Takahiro Tsubaki, Yuzuru Hoshi
  • Patent number: 10340827
    Abstract: Technical solutions are described for determining a sensor failure in a motor control system with at least three phase current measurements. An example system includes a current controller to generate an input voltage command for a motor using feedforward control. The system further includes a failed sensor identification module that, in response to the current controller operating using the feedforward control, determines that a current offset error is indicative of a failure of a current sensor, the current offset error determined based on a magnitude and a phase of a diagnostic current. Further, the failed sensor identification module identifies the current sensor experiencing the failure based on a phase value of the diagnostic current in response to the failure.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: July 2, 2019
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Prerit Pramod, Varsha Govindu
  • Patent number: 10302678
    Abstract: A motor current measurement circuit (7) includes a sense resistor (8) located in a path through which, in use of the motor (1), at least a part of the current flowing into or out of the motor flows, a first amplifier which comprises a differential amplifier (9) which has a first input and second input which are respectively connected to the opposing ends of the sense resistor and has an output at which the amplifier (9) is arranged to produce, in use, an output signal representative of a voltage dropped across the resistor (8) and hence the current flowing through the resistor (8), and an analogue to digital converter (12) having an input which is connected to the output of the first amplifier (9) and an output.
    Type: Grant
    Filed: November 25, 2010
    Date of Patent: May 28, 2019
    Assignee: TRW limited
    Inventor: Ernest Henry Introwicz
  • Patent number: 10286950
    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: February 10, 2015
    Date of Patent: May 14, 2019
    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: 10228029
    Abstract: A control apparatus controls a driving force transmission device including: an electric motor; a pressing mechanism to convert the rotational force of the motor into an axial pressing force; friction clutches including friction members configured to come into frictional engagement with each other by the pressing force provided by the pressing mechanism. The driving force transmission device is configured to transmit a driving force between a pair of rotary members by the friction clutches. The apparatus includes: a target current calculating circuit to calculate a target current to be supplied to the motor; and a correction circuit to correct a voltage to be applied to the motor so as to reduce a difference between the target current and an actual current supplied to the motor. The correction circuit increases or reduces, in accordance with the actual current, the amount of correction of the voltage to be applied to the motor.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: March 12, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Tomohiro Nozu, Akira Kodama, Shotaro Niimi
  • Patent number: 10227088
    Abstract: A method for managing a power steering system, including a step (a) of detecting a reversal in the steering direction which involves acquiring a signal, referred to as a “motor torque signal” (CMot), representative of the assistance force (Cassist) delivered by the power steering motor, then evaluating the time derivative (?CMot/?t) of the motor torque signal, then comparing the time derivative of the motor torque signal to a predefined variation threshold (Spic) in order to detect a derivative peak, greater than the variation threshold (Spic), that indicates a reversal in the steering direction. The method next includes a friction evaluation step (b) which involves evaluating the friction from the drop, during the reversal in the steering direction, in a so-called “actuation force signal” (Caction), which is representative of the total actuation force exerted together on the power steering by the driver and by the power steering motor.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: March 12, 2019
    Assignee: JTEKT EUROPE
    Inventors: Sébastien Bourdrez, Pascal Moulaire, Christophe Ravier
  • Patent number: 10202146
    Abstract: A steering control device capable of causing a steering torque to follow a target steering torque when a driver holds a steering wheel for steering, and making an adjustment so that the steering wheel returns to a neutral position at an appropriate speed, when the driver releases his or her hands from the steering wheel. A motor is controlled based on a motor steering assist torque, which is a sum of a first steering assist torque, which is proportional to an integral value of a deviation between the target steering torque and the steering torque, and a second steering assist torque, which is proportional to a motor rotational angular velocity and acting in a direction of suppressing a return speed of the steering wheel when the steering wheel returns to the neutral position.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: February 12, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Masaya Endo, Hidetoshi Ikeda, Yoshihiko Kinpara, Hiroaki Kitano
  • Patent number: 10199982
    Abstract: A self-holding termination determination section has an overheat protection map that defines a relationship between a current value and a maximum temperature of a protected portion to which a current value is applied, and sets a limit temperature corresponding to a required current value at next start time based on the map. The self-holding termination determination section calculates, as an evaluation temperature, temperature obtained by adding a performance assurance upper limit temperature, which assures output performance of a motor at the next start time, to the sum of temperature rises. In a next time performance determination process, if the evaluation temperature for all protected portions has fallen below the limit temperature, the self-holding termination determination section determines that a performance assurance condition is met, and terminates power self-holding based on at least the fact that the performance assurance condition is met.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: February 5, 2019
    Assignee: DENSO CORPORATION
    Inventor: Go Endoh
  • Patent number: 10183697
    Abstract: The present embodiments relate to a system and a method for controlling autonomous steering according to a required torque from a driver assistance system, in which when outputting a driving current by the required torque, a compensation current is output by applying gains according to a car speed, steering angle, steering angle speed, and required torque to a variation in torque by the rotation of a steering wheel, thereby achieving autonomous steering with the smooth rotation of the steering wheel without intermittent interruptions even in high friction between the car and the road depending on road conditions.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: January 22, 2019
    Assignee: MANDO CORPORATION
    Inventor: Sung Gun Lee
  • Patent number: 10179601
    Abstract: An electric power steering apparatus that enables implementation of a desired steering torque without being affected by a state of a road surface by controlling a steering torque so as to become a value corresponding a steering angle and a steering angular velocity. The apparatus includes a SAT compensation value calculating section that calculates a SAT compensation value based on a SAT value; and a steering reaction compensation value calculating section that calculates a steering reaction compensation value based on the SAT compensation value, a steering angle and a steering angular velocity, and corrects the current command value by the steering reaction compensation value. Further, an electric power steering apparatus controls a twist angle of a torsion bar so as to follow a value corresponding to a steered angle.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: January 15, 2019
    Assignee: NSK LTD.
    Inventor: Takahiro Tsubaki
  • Patent number: 10179603
    Abstract: An electric power steering apparatus including a torque sensor to detect a steering torque and a motor control unit to control a motor that applies an assist torque to a steering system of a vehicle, including a function to switch a control system of the motor between a torque control system to control a motor output torque and a position/speed control system to control a steering angle of a steering in accordance with a predetermined switching trigger, such that a fade processing switches from the torque control system to the position/speed control system or vice versa.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: January 15, 2019
    Assignee: NSK LTD.
    Inventors: Ryo Minaki, Takayoshi Sugawara, Hideki Sawada
  • Patent number: 10167012
    Abstract: With an object of allowing steering wheel operation to be carried out easily at a normal time and when an abnormality occurs, the invention includes a motor having two windings and a control unit having two control systems that supply control signals to each winding of the motor and when an abnormality occurs in one winding of the motor or in one system inside the control unit, a supply of current to the winding in which the abnormality has occurred is cut to zero, and the motor is driven by a predetermined current necessary at a normal time being supplied to the other winding, while at a time of a normal drive when no abnormality has occurred, the current supply is shared between the two windings, whereby the motor is driven.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: January 1, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshihito Asao, Akihiko Mori
  • Patent number: 10164559
    Abstract: An electric power system includes a polyphase electric machine, battery pack, power inverter module, analog input sensor, and diagnostic controller executing a method. The sensor measures an electrical parameter that differs from a true value of the parameter by an initial offset value. The controller collects sample sets of the parameter, compares the initial offset of each sample to an outlier threshold in a first diagnostic loop, and transmits a bit flag indicative of an outlier sample to a slower second diagnostic loop when the initial offset of a sample exceeds the outlier threshold. The second control loop calculates a rolling average of the initial offsets of the sample sets, discards the set containing the outlier sample in response to the bit flag, and executes a control action when the average exceeds a threshold that is lower than the outlier threshold.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: December 25, 2018
    Assignee: GM Global Technology Operations LLC
    Inventors: Brian A. Welchko, Siddharth Ballal, Wesley G. Zanardelli
  • Patent number: 10155533
    Abstract: A motor controller includes a temperature estimator that estimates a temperature of an element in a motor driver circuit that drives a motor, or a temperature of a winding of the motor, and a non-volatile memory that provides a first area and a second area for storing the estimated temperature. The temperature estimator writes the estimated temperature to both of the first area and the second area.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: December 18, 2018
    Assignee: DENSO CORPORATION
    Inventor: Rei Muramatsu
  • Patent number: 10144449
    Abstract: An electric power steering apparatus that calculates a current command value based on at least a steering torque and assist-controls a steering system by driving a motor based on the current command value, the apparatus having a function to detect a steering angle on a steering and includes a gain section having a gain characteristic that a gain changes corresponding to the steering angle, such that a new current command value is generated by multiplying the current command value with the gain outputted from the gain section corresponding to the steering angle, and the gain characteristic is a constant value “1.0” till a steering angle ?1 short of a rack end, gradually decreases till a steering angle ?2 (>?1) exceeding the rack end and holds a constant value G (>0) in a region that the steering angle is equal to or more than the steering angle ?2.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: December 4, 2018
    Assignee: NSK LTD.
    Inventor: Yukihiro Imamura
  • Patent number: 10144448
    Abstract: An electric power steering apparatus including a torque sensor to detect a steering torque and a motor control unit to control a motor that applies an assist torque to a steering system of a vehicle, including: a function to switch a control system of the motor between a torque control system to control a motor output torque and a position/speed control system to control a steering angle of a steering in accordance with a predetermined switching trigger. The fade processing time from the torque control system to the position/speed control system and the fade processing time from the position/speed control system to the torque control system are individually set.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: December 4, 2018
    Assignee: NSK LTD.
    Inventors: Ryo Minaki, Takayoshi Sugawara, Hideki Sawada
  • Patent number: 10137929
    Abstract: An electric power steering device for a vehicle includes a plurality of assist systems electromagnetically driving an electric motor. When a first or second assist system malfunctions, a malfunction state assist amount calculation part calculates an assist amount while decreasing a limit value at the vehicle stopping, to an amount smaller than a limit value at the vehicle moving. When a malfunction such as a disconnection or a fixing of the switching elements occurs in the first or second assist systems on the basis of a judgment result of a malfunction judgment function, an assist amount switching part supplies an assist amount received from the malfunction state assist amount calculation part to first and second motor drive control parts. When a malfunction occurs in one of the first and second assist systems, one of the first and second motor drive control parts drives the motor by using the assist amount.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: November 27, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kenichiro Aoki, Kenji Shibata, Takayoshi Tsujimoto
  • Patent number: 10118636
    Abstract: A high-performance electric power steering apparatus that includes a control system based on a physical model, includes a model following control that an output (a distance to a rack end) of a controlled object follows-up to a reference model, eliminates or reduces the occurrences of a noisy sound and a shock force at an end hitting without giving any uncomfortable steering feeling to a driver, and reduces the end hitting. The electric power steering apparatus calculates a current command value based on at least a steering torque and performs an assist-control of a steering system by driving a motor based on the current command value, including: a configuration of a model following control including a viscoelastic model as a reference model within a predetermined angle at front of a rack end so as to suppress a rack end hitting.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: November 6, 2018
    Assignee: NSK LTD.
    Inventors: Toru Sakaguchi, Shoya Maruyama
  • Patent number: 10118638
    Abstract: A motor driven power steering (MDPS) system may include: a torque sensor configured to measure a steering torque caused by a steering operation of a driver; a steering angle sensor configured to measure a steering angle of the steering operation; and a controller configured to determine a control torque according to the steering angle measured through the steering angle sensor, calculate an input torque based on the control torque and the steering torque measured through the torque sensor, and determine an assist torque based on the calculated input torque.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: November 6, 2018
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventors: Kevin McLaughlin, Hyung Ju Kwon, Jonah Shapiro
  • Patent number: 10112643
    Abstract: An electric power steering device includes a phase advance correction unit configured to advance a phase of a steering torque signal detected by a torque sensor detecting a steering torque input from a steering wheel, a specific frequency extraction unit configured to extract a component in a specific frequency band out of the steering torque signal detected by the torque sensor, a gain multiplication unit configured to correct a steering torque signal computed on the basis of an output signal of the phase advance correction unit and an output signal of the specific frequency extraction unit such that the steering torque signal reaches a limit value set by a limiter by multiplying the steering torque signal by a gain, and an addition unit configured to add an assist correction command value calculated on the basis of an output signal output from the gain multiplication unit to the assist command value.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: October 30, 2018
    Assignee: KYB Corporation
    Inventors: Hiroyuki Gotou, Noboru Yoshida, Kenji Nishikubo, Yuichiro Okamoto, Kouichi Yamashina
  • Patent number: 10106191
    Abstract: An electric power steering device includes a basic return command value calculation unit configured to calculate a basic return command value in a direction to return a steering wheel to a neutral position on the basis of a steering angle of a steering wheel, a turn/return determination unit configured to determine the turn and the return of the steering wheel, a gradually changing return command value calculation unit configured to calculate a gradually changing return command value, the gradually changing return command value gradually increasing, while the return of the steering wheel is determined by the turn/return determination unit, and a return command value calculation unit configured to calculate a return command value by adding the gradually changing return command value to the basic return command value. The electric motor is driven by adding the return command value to the assist command value.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: October 23, 2018
    Assignee: KYB Corporation
    Inventors: Hiroyuki Gotou, Noboru Yoshida, Yuichiro Okamoto, Nobuyuki Kimura, Takayuki Nagase, Kazuma Yamazaki
  • Patent number: 10103607
    Abstract: In a reference state of a rotation angle detector, plural first output coils include first output coils having the number of windings of Ai and Aj, plural second output coils include second output coils having the number of windings Bk and Bm. The rotation angle detector includes at least one configuration from among: a configuration in which the numbers of windings of the first and second output coils are the same numbers of windings as in the reference state, with the exception that the number of windings Ai is the number of windings Ai±a or the number of windings Aj is the number of windings Aj±a; and a configuration in which the number of windings Bk is the number of windings Bk±b or the number of windings Bm is the number of windings Bm±b.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: October 16, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Ryuichi Takiguchi, Satoru Nakada, Morishige Minobe, Shuhei Niikura, Shunta Kashima, Takanori Komatsu
  • Patent number: 10097129
    Abstract: To provide drive controller and control method for an electric motor including plural energization systems composed of an inverter and coils corresponding to plural phases. The controller includes: a current detecting unit for detecting currents between the coils and output points of the inverter or between the coils and a connection point between the coils; an inverter setting unit for controlling an inverter of the energization system involving abnormal energization into a predetermined condition; a torque detecting unit for detecting a torque generated in the energization system involving the abnormal energization based on a current in the energization system, which is detected by the current detecting unit; and a control unit for controlling a normal inverter based on the torque detected by the torque detecting unit. This configuration enhances the performance of controlling the electric motor in case a braking torque is generated due to abnormal energization.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: October 9, 2018
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tomonobu Koseki, Tomishige Yatsugi
  • Patent number: 10093344
    Abstract: An electric power steering apparatus includes a rotating assist force computing unit for computing an assist force in the rotating direction of a steering wheel, a returning assist force computing unit for computing a returning assist force, which is a steering assist force in a direction opposite to the rotating direction, and a summing unit for adding up the computed assist force in the rotating direction and the computed returning assist force. The electric power steering apparatus returns the steering wheel and steered road wheels to the neutral position at an earlier time if a driver releases his or her hands from the steering wheel when rotating the steering wheel.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: October 9, 2018
    Assignee: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
    Inventors: Hiroki Yamanaka, Hiroshi Ohi, Seiji Chuda, Junichi Yoshizawa
  • Patent number: 10093347
    Abstract: A motor driven power steering system may include: a steering angle sensor configured to sense a steering angle of a steering wheel; a motor current sensor configured to sense a current of a motor; an encoder configured to sense a position of the motor; a vehicle speed sensor configured to sense a speed of a vehicle; a virtual torque estimation unit configured to estimate, when an error of a torque sensor is detected, a virtual torque using the position of the motor, the steering angle of the steering wheel, and the current of the motor; and an assist torque calculation unit configured to calculate an assist torque for operation of the motor using the steering angle of the steering wheel, the speed of the vehicle, and the virtual torque.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: October 9, 2018
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventors: Cheon Kyu Kim, Ji Hoon Yoo
  • Patent number: 10077068
    Abstract: A control system for a power steering system includes a motor; a control module in communication with the motor, the control module providing a compensated velocity loop command to the motor. The control module includes a stability compensation filter module that receives a vehicle speed and a velocity loop command, the stability compensation filter applies a second order filter on the velocity loop command to generate the compensated velocity loop command used by the motor.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: September 18, 2018
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Michael K. Hales, Tejas M. Varunjikar, Shrenik P. Shah
  • Patent number: 10071764
    Abstract: An embodiment of a system for evaluating a torque sensor includes an input module configured to receive torque signals from a hand wheel torque sensor in a vehicle, and a sensor evaluation module configured to perform monitoring a condition affecting the hand wheel torque sensor, and determining whether the condition indicates a desired situation in which a probability of an input torque being applied to the hand wheel is below a selected threshold. The sensor evaluation module is also configured to perform, based on detecting the desired situation, automatically analyzing the torque signals received during a time duration of the desired situation to estimate one or more torque sensor error values, and outputting at least one of a corrected torque signal and the one or more error values to a torque command generation module, the torque command generation module configured to generate a torque command to an electric motor.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: September 11, 2018
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Daniel Carriazo-Rabadán, Bertram Moeller, Shrenik P. Shah, Michael K. Hales
  • Patent number: 10065673
    Abstract: A power steering control system is provided. The control system includes an actual module that determines an actual load torque associated with a vehicle chassis. A steering module generates a steering control signal based on the actual load torque.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: September 4, 2018
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Jon D. Demerly, Siddharth H. D'Silva
  • Patent number: 10054096
    Abstract: A system for automatically adjusting the temperature and carbon monoxide level in an occupied passenger compartment of a vehicle includes sensors for sensing carbon monoxide levels, temperature, and occupants in the passenger compartment. A controller receives input from the sensors, and activates an electric heater or an electric cooler to bring the temperatures within the passenger compartment within a predetermined temperature range if the temperature detected within the passenger compartment falls outside of the predetermined range of temperatures. The controller may automatically shut off the engine of the vehicle when the vehicle is in idle and the carbon monoxide level within the passenger compartment falls above a predetermined level, or if a transmission lever of the vehicle is placed in a park position. A motor generator unit coupled to the engine provides electricity to rechargeable batteries of an alternate power unit, which powers the electric heater and the electric cooler.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: August 21, 2018
    Assignee: N4 INNOVATIONS, LLC
    Inventor: Bruce Richard Berkson
  • Patent number: 10040474
    Abstract: A steering control device (30) for a vehicle, the steering control device controlling a steering device, the steering device having a steering mechanism (10) configured to steer wheels (15) and a driving device (40) configured to provide the steering mechanism (10) with Steering force for the wheels (15), the steering control device configured to; detect turning of the wheels (15); determine whether the vehicle is in a stationary steering state; and increase, when the vehicle is determined to be in a stationary steering state as a result of determination whether the vehicle is in a stationary steering state, the steering force to be provided to the steering mechanism (10) than a value upon determination that the vehicle is not in a stationary steering state, wherein the steering control device (30) is further configured to decrease the steering force to be provided to the steering mechanism (10) than before when the turning of the wheels (15) is detected as a result of providing the steering force with the st
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: August 7, 2018
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Daisuke Oiki, Masahiko Kikuchi, Akira Morimoto
  • Patent number: 10029726
    Abstract: A electric power steering device includes a basic return command value calculation unit configured to calculate a basic return command value in a direction to return a steering wheel to a neutral position on the basis of a steering angle of the steering wheel, a return command value calculation unit configured to calculate a return command value by correcting the basic return command value by the first correction gain, and an opposite return command value calculation unit configured to calculate an opposite return command value in a direction not to return the steering wheel to the neutral position on the basis of an angular acceleration of an electric motor. A correction return command value is calculated on the basis of the return command value and the opposite return command value and the electric motor is driven by adding the correction return command value to the assist command value.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: July 24, 2018
    Assignee: KYB Corporation
    Inventors: Hiroyuki Gotou, Hisazumi Ishikawa, Kazuhiro Sasaki, Yuichiro Okamoto, Nobuyuki Kimura, Takayuki Nagase, Kazuma Yamazaki
  • Patent number: 10019841
    Abstract: A vehicular camera includes a housing, a lens, an image sensor positioned for receiving images from the lens, a processor, and a memory. The memory contains a plurality of overlays. The processor is programmed to (a) receive first input data from a vehicle in which the camera is to be mounted, wherein the first input data correspond to the configuration of the vehicle, and (b) select a particular overlay to display based at least in part on the input received.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: July 10, 2018
    Assignee: MAGNA ELECTRONICS INC.
    Inventors: Joel S. Gibson, Steven V. Byrne, Richard D. Shriner
  • Patent number: 10006784
    Abstract: A correction circuit stores data for obtaining coefficients of a relational expression indicating a relationship between a disturbance magnetic flux and a rotational angle error. Then, the coefficients are obtained from the data for obtaining the coefficients, and a detection result of a magnetic sensor is corrected based on the coefficients obtained, a relational expression, and a detection result of a disturbance magnetic flux detection circuit. Since it is possible to obtain the rotational angle error with respect to the disturbance magnetic flux from the coefficient obtained and the relational expression, it is not necessary to store the data indicating the relationship between the disturbance magnetic flux and the rotational angle error for all of the disturbance magnetic flux value in disturbance magnetic flux regions that may be applied.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: June 26, 2018
    Assignee: DENSO CORPORATION
    Inventors: Takuya Kawamura, Hirofumi Kinjou, Toru Wakimoto, Hideaki Nakayama, Masataka Yoshimura
  • Patent number: 10005491
    Abstract: An electric power assisted steering system comprising an input shaft and an output shaft, an electric motor connected to the output shaft, at least two sensors including one or more of: a position sensor, a torque sensor, and a motor position, and a motor controller that causes the motor to apply an assistance torque as a function of the torque measured by the torque sensor, in which each of the sensors produces at least one output signal represented by a stream of digital samples captured at discrete times, and in which the apparatus further comprises: processing means arranged to process together the output signals from both processing units to produce at least one further signal.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: June 26, 2018
    Assignee: TRW Limited
    Inventor: James Owen Patrick Farrelly
  • Patent number: 9994249
    Abstract: Maneuverability and stability of a suspension unit for a vehicle are improved. A vehicle includes: a steer-by-wire system detecting a displacement of a steering wheel and displacing a steering rack steering steerable wheels on a basis of a detection result of the displacement and a suspension unit suspending the steerable wheels, the suspension unit including: wheel hub mechanisms, each wheel hub mechanism supporting a tire wheel on which a tire is attached, and a plurality of link members supporting the wheel hub mechanisms on the vehicle body; and a kingpin axis passing through an upper pivot point of the link members and lower pivot point of the link members being set to pass through a road surface contact area of the tire at a neutral position of the steering wheel.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: June 12, 2018
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Yusuke Kageyama, Yutaka Mikuriya