Condition Modulated Patents (Class 180/446)
  • Patent number: 9211885
    Abstract: In an apparatus for controlling a vehicle having driving sources, a driver request torque command is calculated based on driver operation information, driving-source commands used to control the sources are calculated by dividing the request torque command among the sources, a driver request torque monitor value used to monitor an abnormality in the request torque command is calculated, driving-source monitor values used to monitor an abnormality in the driving-source commands are calculated, a driver request torque monitor margin used to determine the abnormality in the request torque command based a difference between the request torque command and monitor value is calculated, driving-source monitor margins used to determine the abnormality in the driving-source commands based on differences between the driving-source commands and monitor values are calculated based on the request torque monitor margin, and the abnormality in the driving-source commands is determined based on the driving-source monitor marg
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: December 15, 2015
    Assignee: DENSO CORPORATION
    Inventor: Tomomi Hase
  • Patent number: 9205864
    Abstract: An object is to prevent a driving assistance system for a vehicle from causing a collision of the self-vehicle with a solid object by performing driving assistance. To achieve the object, when a solid object that can be an obstacle exists in the course of the self-vehicle, the driving assistance system according to the present invention determines a plurality of paths along which the self-vehicle can travel by changing the momentum thereof, designates an avoidance line along which the solid object can be avoided from among the plurality of paths, and changes the momentum of the self-vehicle in such a way that the self-vehicle travels along the selected avoidance line. If the plurality of path do not include a path along which the solid object can be avoided, the driving assistance system changes the momentum of the self-vehicle again in the middle of a path selected from among the aforementioned paths, thereby avoiding the solid object.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: December 8, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Toshiyuki Matsubara
  • Patent number: 9205867
    Abstract: The turning angle of the left and right front wheels is controlled based on an SBW command turning angle corresponding to the steering angle of a steering wheel mechanically uncoupled from the left and right front wheels and a disturbance suppression command turning angle to suppress the yaw angle generated in the vehicle by disturbance. The steering reaction force to be applied to a column shaft is controlled based on the steering angle of the steering wheel.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: December 8, 2015
    Assignee: NISSAN MOTOR CO., LTD.
    Inventor: Yuya Takeda
  • Patent number: 9199664
    Abstract: A steering apparatus for a HEV which assists in providing power steering regardless whether an engine is being operated, and a method of controlling the same. More specifically, one or more detectors detect a vehicle speed, a steering angle, and an engine RPM, and a pump is controlled according to the engine RPM based upon signals received from the one or more detectors. Additionally, an electric motor unit (EMU) mounted to a steering column unit separately from the power steering pump, provides power assisting in steering the vehicle. Also a hybrid control unit (HCU) receives a signal from one or more of the detectors to control a power steering pump and an electric motor unit as required.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: December 1, 2015
    Assignee: Hyundai Motor Company
    Inventor: Jin Seok Bang
  • Patent number: 9199667
    Abstract: A method for a semi-autonomous driving of a vehicle with a steer-by-wire system having a steering wheel mechanically decoupled from vehicle wheels determines values for the steering angle and the wheels angle tracking a target value of the wheels angle received from a semi-autonomous driving planning (SADP) system. The method determines the values for the steering angle and the wheels angle subject to constraints, including a constraint on a motion of the vehicle wheels, a constraint on a motion of a steering wheel, a constraint on an actuation of the steering wheel and the vehicle wheels, and a constraint on a relative motion of the steering wheel with respect to the motion of the vehicle wheels. The control commands to the column motor and the rack motor are generated according to the values for the steering angle and the wheels angle.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: December 1, 2015
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Stefano Di Cairano, Spyridon Zafeiropoulos
  • Patent number: 9193379
    Abstract: An apparatus for stabilizing a steering feel in a motor-driven power steering (MDPS) includes: an input unit configured to receive a column torque of a steering wheel; a calculation unit configured to convert the column torque signal inputted from the input unit into a target signal for generating a compensation signal of the steering wheel; and a compensation unit configured to calculate an assist torque for compensating for a main assist torque based on the target signal from the calculation unit.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: November 24, 2015
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Seok Hwan Jang
  • Patent number: 9184690
    Abstract: An electrically driven power steering system is capable of reducing development of a noisy magneto-strictive sound. A voltage corresponding to each PWM pulse achieving time corresponding to a hysteresis is added to one of the voltage command values of a large voltage phase from among three phase first voltage command values. The added voltage is subtracted from one of the remaining voltage command values, which is a voltage small phase, to derive virtual voltage command values, and the virtual voltage command values are mutually compared to carry out a voltage magnitude phase determination for a three-phase brushless motor of the power steering system.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: November 10, 2015
    Assignee: Hitachi Automotive Systems Steering, Ltd.
    Inventors: Masaki Kashima, Atsushi Yoshitaka
  • Patent number: 9180912
    Abstract: A system and method for steering torque compensation carried out in a controller of a vehicle that detects a braking event from a comparison of actual vehicle information with a corresponding threshold value, determines a steering torque compensation signal, generates a request to implement the steering torque compensation signal, and implements the steering torque compensation signal during the braking event.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: November 10, 2015
    Assignee: Ford Global Technologies
    Inventors: Jens Dornhege, Martin Saeger, Frank Peter Engels
  • Patent number: 9174668
    Abstract: In an electric power steering system, an ECU calculates a steering angle of a steering wheel based on an output of a rotation angle sensor and an EPS gear ratio. The ECU calculates a correction amount for canceling a steering deviation caused due to a temperature change, based on a temperature of a rack shaft detected by a temperature sensor and a map stored in a memory, and corrects the correction amount by adding the correction amount to the calculated steering angle.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: November 3, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Hiroshi Kichise
  • Patent number: 9150244
    Abstract: A method of estimating friction in a steering system controlled by a control module is provided. The method includes performing by the control module, estimating a steering load gain; estimating a steering load hysteresis; and determining friction based on the steering load gain, the steering load hysteresis, and a reference model.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: October 6, 2015
    Assignee: Steering Solutions IP Holding Corporation
    Inventor: Steven D. Klein
  • Patent number: 9146166
    Abstract: A method for determining an electrical torque of an electrical machine includes determining an electrical torque in a first speed range with a first algorithm, and determining the electrical torque in a second speed range with a second algorithm which differs from the first algorithm. An upper limit of the second speed range is slightly higher than a lower limit of the first speed range. An apparatus is provided to determine the electrical torque of the electrical machine with the aforedescribed method.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: September 29, 2015
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Hans-Georg Köpken, Stefan Künzel, Hubert Schierling, Günter Schwesig, Heiko Zatocil
  • Patent number: 9145163
    Abstract: A system for providing an electrical steering assist for a materials handling vehicle includes a drive housing; a steerable wheel coupled to the drive housing; a steering arm pivotally mounted to the drive housing; a steer drive unit coupled to the steerable wheel; an input sensing device; and a controller. The steering arm is operatively configured to determine a steering direction of the steerable wheel. The input sensing device is arranged to detect a turning force applied to the steering arm by an operator, wherein the turning force is provided to change the angle of travel of the vehicle. The input sensing device includes a strain measuring assembly defining a strain sensitive region between the steering arm and the steer drive unit. The controller is operatively configured to control the steer drive unit to turn the steerable wheel based upon a signal from the input sensing device.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: September 29, 2015
    Assignee: Crown Equipment Corporation
    Inventors: Anthony T. Castaneda, Todd M. Fullenkamp, Eric L. Jensen, Stephen T. Mangette, Jared J. Ranly, Vernon W. Siefring
  • Patent number: 9120500
    Abstract: Methods and apparatus are provided for reducing steering wheel vibrations in electronic power steering systems. The apparatus includes a processor and performs a method that estimates an average angular wheel speed of at least one wheel of the vehicle; determines an average wheel angle from the average angular wheel speed; generates sine and cosine functions of the average angular wheel angle; processes the sine and cosine functions with a steering wheel torque signal received from a torque sensor to extract amplitude components of at least one of the sine and cosine functions; reconstructs the sine and cosine functions using the steering wheel torque signal; combines the sine and cosine functions to provide a control signal, and controls the EPS system via the control signal to attenuate smooth road shake vibrations in a steering wheel of the vehicle.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: September 1, 2015
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Kenneth L. Oblizajek, John D. Sopoci, Suresh Puradchithasan
  • Patent number: 9108664
    Abstract: A control apparatus of a vehicle for changing a lane is provided that includes a target lane generator configured to generate a target lane; a target distance generator configured to generate a target distance; a circular trace generator configured to generate a circular trace passing a current point of a vehicle and a point on a center line of the target lane spaced by the target distance based on the vehicle, and having a driving direction of the vehicle as a tangential direction in real time; and a steering controller configured to calculate a target rate and a target steering angle so as for the vehicle to follow the generated circular trace. The control apparatus prevents a sense of steering difference and a pulling phenomenon of the vehicle when changing a lane. Also, a control method of a vehicle for changing a lane is provided.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: August 18, 2015
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Jeong Hee Lee
  • Patent number: 9102354
    Abstract: An apparatus (10) for use in turning steerable vehicle wheels (14, 16) includes a steering member (12) which is linearly movable relative to the vehicle to effect turning movement of the steerable vehicle wheels. A pinion (28) is disposed in meshing engagement with a rack portion (30) of the steering member (12). A steering column (22) is connected with the pinion (28) and with a vehicle steering wheel (20) such that rotation of the steering wheel results in linear movement of the steering member. An electrically powered steering unit (40) is connected to the steering member (12) for providing steering feel to the operator. A hydraulic power steering motor (60) mechanically connected to the steering member provides steering assist to the steerable wheels (14, 16).
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: August 11, 2015
    Assignee: TRW AUTOMOTIVE U.S. LLC
    Inventors: Daniel E. Williams, Elbert Owens
  • Patent number: 9105199
    Abstract: A device (10) for simulating an alternator is connected to an alternator control circuit (20) and supplies a voltage on an electrical network (30). This device comprises: a circuit for receiving an excitation current (Iexc) generated by the control circuit (20); a switch (15) able to apply voltage to the network (30) and controlled on the basis of the excitation current (Iexc). A method of controlling such a device and a simulation system comprising such a device also are described.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: August 11, 2015
    Assignee: AIRBUS Operations S.A.S.
    Inventors: Patrick Irubetagoyena, Eric Resseguier, Herve Mercadal, Nicolas Bouisset
  • Patent number: 9096262
    Abstract: In a method for detecting contact between a driver's hands and the steering wheel (12) of a vehicle, an actuator (14) for selectively applying a steering force and sensors (22) for measuring the instantaneous steering force and/or the steering angle being associated with the steering wheel (12), the actuator (14) impresses (32) a test force pulse pattern on the steering wheel (12). The steering force sensor and/or the steering angle sensor (22) measure(s) the reaction of the steering wheel movement to the test pulse pattern, and the reaction of the steering wheel movement is used to decide whether or not at least one of the driver's hands is in contact with the steering wheel (12).
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: August 4, 2015
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventor: Joseph Andreas Urhahne
  • Patent number: 9096255
    Abstract: Exemplary embodiments of the present invention relate to a friction compensation logic of MDPS and a friction compensation method using the same. The friction compensation logic of MDPS in accordance with an embodiment of the present invention includes: a signal processor configured to extract only a signal having a limited range from column torque signals input from a column torque; a friction compensation sign calculator configured to determine a friction compensation sign by integrating the column torque signal extracted by the signal processor and calculating the friction compensation sign by limiting the integrated value to a set value; and a friction compensation torque calculator configured to calculate a friction compensation torque by reflecting a friction compensation amount to a value calculated by the friction compensation sign calculator.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: August 4, 2015
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Kevin MacLaughlin
  • Patent number: 9096256
    Abstract: The present invention provides a system and method of providing high reliability for an absolute angle in an electric power steering system in which the final absolute steering angle is calculated using a device configured to measure an absolute steering angle and a relative steering angle.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: August 4, 2015
    Assignee: MANDO CORPORATION
    Inventors: Hyun Seop Jang, Do Wook Kwon
  • Patent number: 9096253
    Abstract: The control apparatus calculates the first assist component on the basis of the steering torque. The control apparatus calculates the turning angle command value from the steering torque and the first assist component on the basis of the ideal model, executes turning angle feedback control for matching the actual turning angle with the turning angle command value, and calculates the second assist component. The control apparatus adds the second assist component to the first assist component to calculate the assist command value. When the deviation between the actual turning angle and the turning angle command value is out of the allowable range, the control apparatus changes the ideal model to remove the second assist component from the assist command value and enhance convergence of the turning angle feedback control system.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: August 4, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Terutaka Tamaizumi
  • Patent number: 9061703
    Abstract: There is provided an electric power steering apparatus which includes a monitoring/controlling means that monitors a failure of a CPU, and controls a drive signal for driving a motor at the time of the failure of the CPU, wherein the monitoring/controlling means has a first control mode for suspending driving of the motor, and a second control mode for continuously controlling the motor with a provisional drive signal, in place of and for restricting the drive signal from the CPU; and wherein, when the monitoring/controlling means detects the failure of the CPU, the monitoring/controlling means selects the second control mode to thereby continue controlling the motor with the provisional drive signal in place of the drive signal from the CPU, and then selects, after the controlling in the second control mode, the first control mode to thereby suspend driving of the motor.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: June 23, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventor: Hiroshi Nishimura
  • Patent number: 9056493
    Abstract: An image forming apparatus includes: a conveyance roller configured to convey recording sheets; a brush motor configured to drive the conveyance roller to rotate; and a control unit configured to control a rotational speed of the brush motor, wherein while the conveyance roller conveys a recording sheet, (i) the control unit applies voltage to an outer circumferential surface of a commutator of the brush motor to drive the brush motor to rotate by a predetermined rotation amount, so as to perform a cleaning operation to remove a film deposited on the outer circumferential surface, and (ii) the control unit reduces the rotational speed of the brush motor while not performing the cleaning operation, so as to correct a conveyance distance of the recording sheet.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: June 16, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yuji Kobayashi, Takaki Kato, Yuta Tachibana, Hiroshi Yamaguchi, Satoshi Teshima
  • Patent number: 9056626
    Abstract: An electric power steering apparatus that is capable of efficiently suppressing vibrations and simultaneously minimizing steering performance degradation such as an increase in a steering wheel's viscous feeling by extracting a vibration component having an arbitrary amplitude and an arbitrary frequency range depending on an electric power steering state parameter and feeding back a vibration suppression compensation value determined depending on the extracted vibration component to a current command value.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: June 16, 2015
    Assignee: NSK LTD.
    Inventors: Yousuke Imamura, Takayoshi Sugawara, Masahiro Maeda
  • Patent number: 9051005
    Abstract: A control system for controlling an electric power steering system is provided. The control system includes a first module configured to compute an on-center torque adjustment compensation based on a sensed handwheel torque. The on-center torque adjustment compensation is configured to compensate for inertia of a steering actuator motor using a frequency-based methodology. The control system also includes a second module configured to generate a command signal to control the steering actuator motor of the electric power steering system based on the on-center torque adjustment compensation.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: June 9, 2015
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Farhad Bolourchi, Ashok Chandy
  • Patent number: 9045157
    Abstract: A zero point change model executes banked road correspondence control when a vehicle travels on a banked road. By this control, a target turning angle when the total torque is zero can be changed from a neutral turning angle to a lower side of an inclined road surface. Thus, a steering angle of a steering wheel according to a banked road can be realized even if the driver does not apply steering torque during traveling on a banked road. Accordingly, the driver can obtain a suitable steering feeling when traveling on a banked road while achieving the target turning angle according to the total torque.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: June 2, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Terutaka Tamaizumi, Hirozumi Eki, Masayuki Kita, Isao Namikawa
  • Publication number: 20150144418
    Abstract: Provided is an electric power steering apparatus capable of performing steering of a steering wheel with a comfortable steering feeling while stabilizing a vehicle behavior even in a vicinity of a steering neutral position. A first electric power steering apparatus includes a steering torque sensor for detecting a steering torque inputted by a driver, a steering angle sensor for detecting a steering angle of a steering wheel, a steering assist motor for applying a steering assist force to the steering wheel, and a drive control unit for performing drive control of the steering assist motor based on the steering torque and the steering angle. The drive control unit performs drive control of the steering assist motor based on the steering angle detected by the steering angle sensor and hysteresis characteristics related to a steering reaction force associated with a change of the steering angle.
    Type: Application
    Filed: November 25, 2014
    Publication date: May 28, 2015
    Inventors: Satoshi OHNO, Yoshihiro ONIWA, Atsuhiko YONEDA, Yasuo SHIMIZU
  • Patent number: 9038764
    Abstract: A motor control circuit includes a power relay, a converter division, a smoothing condenser, a control circuit and a motor drive circuit, and is connected to a battery as high voltage power and to an electrical motor. The battery is connected with a driving battery having the high voltage such as 288V etc. A step down circuit reduces the high voltage to a low voltage such as 36V etc., charges a low voltage charge device and supplies drive power to the motor drive circuit. When the vehicle collision is occurred, the control circuit detects the collision by a value of detected acceleration, a power change relay is turned on to change to the power source from the low voltage charge device after voltage of the smoothing condenser is reduced, thereby connecting the low voltage to the motor drive circuit.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: May 26, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Motoo Nakai
  • Patent number: 9020703
    Abstract: A power steering apparatus includes: a torque sensor for detecting a steering torque applied to a steering wheel and outputting a torque signal corresponding to the steering torque; a speed sensor for detecting a speed of a vehicle and outputting a speed signal corresponding to the speed of the vehicle; a humidity sensor for outputting a humidity signal corresponding to a humidity of an interior of the power steering apparatus; and an electronic control unit for receiving the humidity signal from the humidity sensor, and for, when a measured humidity is an reference value or higher, generating a motor current signal for supplying an assistant steering force smaller than an assistant force set in response to the torque signal and the speed signal.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: April 28, 2015
    Assignee: Mando Corporation
    Inventors: Hong Yong Bhae, Hyun Chul Tae
  • Patent number: 9010482
    Abstract: A knurled press-fitting portion and an annular groove, which receives foreign matter and is formed to extend in a circumferential direction in front of the press-fitting portion of a cylindrical protruding portion, are provided at an outer peripheral surface of the protruding portion of an output shaft. A fitting portion, which is fitted to a coupling tube by press-fitting, is formed at an outer periphery of an opening end of the protruding portion. An outer peripheral surface of the cylindrical fitting portion and an inner peripheral surface of the cylindrical coupling tube coupled to a Z4 gear are fitted and coupled to each other. The annular groove is closed by the fitting portion in a state where the protruding portion and the coupling tube are coupled to each other. The annular groove is configured so as to prevent foreign matter from being discharged toward a bearing gear.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: April 21, 2015
    Assignee: JTEKT Corporation
    Inventor: Satoshi Motoyama
  • Patent number: 9004221
    Abstract: Torque sensor detects torque of steering shaft formed by first and second shafts which are connected through torsion bar. Torque sensor has: a magnetic member provided at the first shaft and having magnetic poles alternately arranged in circumferential direction concentrically with rotation axis; a first yoke member provided at the second shaft and having (a) first nail portions arranged concentrically with the rotation axis and facing the magnetic member in radial direction and (b) a first ring portion; a second yoke member provided at the second shaft and having (c) second nail portions arranged concentrically with the rotation axis so that the first and second nail portions are alternately arranged in the circumferential direction and the second nail portions face the magnetic member in the radial direction and (d) a second ring portion arranged to be separated from and face the first ring portion; and a magnetic sensor.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: April 14, 2015
    Assignee: Hitachi Automotive Systems Steering, Ltd.
    Inventors: Osamu Yoshida, Tatsuyoshi Maruyama, Kiyotaka Shirakubo, Kohtaro Shino, Makoto Kimura
  • Patent number: 9004222
    Abstract: An electric power steering apparatus transmits rotational force of a motor to a rack shaft via a driver pulley, a belt, a driven pulley, and a ball nut. A ball bearing and the driven pulley are fitted to the outer circumferential surface of the ball nut. Also, the ball nut is rotationally supported to the inner circumferential surface of a housing via the ball bearing. A female thread portion is formed on the inner circumferential surface of the driven pulley. The ball nut has a male thread portion formed in a first end and a flange formed in a second end. By fastening the male thread portion and the female thread portion to each other, the ball bearing is clamped between the flange and the driven pulley, while the ball nut and the driven pulley are fastened to each other.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: April 14, 2015
    Assignee: Jtekt Corporation
    Inventors: Tetsuya Kaneko, Toshihiro Asakura, Yuichi Yamanaka
  • Publication number: 20150096826
    Abstract: A method of controlling an electric motor of a power steering system having at least three windings is described, wherein a control unit applies a current to the windings of the electric motor to generate a total torque having a value which is ascertained by the control unit from a set-point torque for steering assistance and a set-point torque for damping. A damping set-point circuit ascertains the set-point torque for damping and a steering assist set-point circuit ascertains the set-point torque for steering assistance. A monitoring circuit monitors the function of the windings of the electric motor. In the event of a malfunction of any of the windings, the monitoring circuit outputs an error signal, upon which the set-point torque for steering assistance is reduced.
    Type: Application
    Filed: October 8, 2014
    Publication date: April 9, 2015
    Applicant: TRW Automotive GmbH
    Inventors: Mario Eden, Keiwan Kashi, Timothy Sworn, Chris Mantjios
  • Patent number: 9002580
    Abstract: A system and a method for controlling an electrically-powered steering apparatus of a vehicle may include a selection switch adapted to select any of a plurality of steering modes, a control switch adapted to change a current for controlling the steering force, a control portion adapted to determine the current according to a signal received from at least one of the selection switch and the control switch and to transmit a control signal according to the determined current, and a drive portion adapted to control the steering force according to the control signal received from the control portion.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: April 7, 2015
    Assignee: Hyundai Motor Company
    Inventors: Nam Young Kim, Yoon Su Kim
  • Patent number: 8997919
    Abstract: A motor-driven steering controller for controlling a steering wheel of a vehicle. The controller includes a steering torque controlling unit, a braking force estimating unit, a right and left braking force difference estimating unit and an assist steering torque providing unit. The steering torque controlling unit controls a steering torque on the steering wheel depending on a steering operation. The braking force estimating unit estimates braking forces to be imposed on wheels of the vehicle. The right and left braking force difference estimating unit estimates difference between the braking forces to be imposed on the right and left wheels each estimated by the braking forces estimating unit. The assist steering torque providing unit provides an assist steering torque for the steering torque controlling unit on the basis of the difference in braking force between right and left wheels estimated by the right and left braking force difference estimating unit.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: April 7, 2015
    Assignees: Aisin Seiki Kabushiki Kaisha, Jtekt Corporation, Advics Co., Ltd.
    Inventors: Yoshiyuki Yasui, Wataru Tanaka, Yuji Muragishi, Eiichi Ono, Katsuhiro Asano, Minekazu Momiyama, Hiroaki Kato, Kenji Asano
  • Publication number: 20150090519
    Abstract: A steering system for a vehicle is disclosed. The steering system may have a steering linkage and a controller. When operation of the steering system is within a predefined relative rotational range, the controller may be programmed to translate steering motion to a steering gear box through a motor. Operation of the steering system outside the predefined rotational limit actuates the steering linkage. Once the steering linkage is actuated, steering motion is translated to the steering gear box directly through the steering linkage.
    Type: Application
    Filed: September 30, 2013
    Publication date: April 2, 2015
    Applicant: Ford Global Technologies, LLC
    Inventor: Anthony Mario D'Amato
  • Publication number: 20150090520
    Abstract: An electric power steering apparatus capable of being both lightweight and rigid. A lightweight electric power steering apparatus is achieved wherein a gear housing (45) that houses an electric assist mechanism, a lower support bracket (54) for fastening the gear housing (45) to the vehicle body, a sensor housing (56) that houses a torque sensor (57), an outer column (30) of a steering column (6c), and an upper support bracket (59a) for fastening the middle section of the outer column (30) to the vehicle body can all be integrally formed of synthetic resin, improving the strength of the joined sections of these members.
    Type: Application
    Filed: October 6, 2014
    Publication date: April 2, 2015
    Inventors: Hiroshi Shibazaki, Tamotsu Waga, Kiyoshi Sadakata, Seiichi Moriyama
  • Patent number: 8989964
    Abstract: A vehicle speed control device is provided. The device includes a steering device which steers left and right wheels, first and second electric motors which separately apply power to the left and right wheels, an operation amount acquisition unit which acquires an acceleration operation amount by the driver of the vehicle, a steering angle acquisition unit which acquires a steering angle which is a value between an inner wheel steering angle and an outer wheel steering angle; a vehicle speed acquisition unit configured to acquire an actual speed of the vehicle; and a control unit configured to control the first electric motor and the second electric motor on the basis of the acceleration operation amount, the actual speed, the steering angle, and a steering geometry indicating a geometric relationship between the steering angle and a turning center of the vehicle.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: March 24, 2015
    Assignee: Advics Co., Ltd.
    Inventors: Yoshiyuki Yasui, Hiroaki Aizawa
  • Patent number: 8985265
    Abstract: An electric power steering apparatus includes an electric motor, a drive torque transmission mechanism for converting a rotation of the electric motor to a linear movement and transmitting the linear movement to vehicle wheels, first and second circuit boards mounting electronic components to process a motor control command and drive the electric motor based on the motor control command, a metal control housing accommodating therein the first and second circuit boards and coupled at an outer surface thereof to the drive torque transmission mechanism, a heat transfer part located inside the control housing so as to receive heat from the respective circuit boards and a heat guide part extending from the outer surface of the control housing to the inside of the heat transfer member so as to guide the heat transferred to the heat transfer part in a direction toward the drive torque transmission mechanism.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 24, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Katsumasa Hagiwara, Haruaki Motoda
  • Patent number: 8978814
    Abstract: The present invention provides a vehicle steering device, comprising: a manual steering means for manually steering steerable wheels in a vehicle; a steering-torque detection means for detecting a steering torque applied to the manual steering means; a first electromotive-torque determination means for determining a first electromotive-torque value based on the detected steering torque; a vehicle-behavior detection means for detecting behavior of the vehicle; a second electromotive-torque determination means for determining a second electromotive-torque value based on a detected value obtained by the vehicle-behavior detection means; an electric motor for applying a combined electromotive torque to the steerable wheels; and a current control means for controlling current supplied to the electric motor based on a value of the combined electromotive torque obtained by adding the first electromotive-torque value to the second electromotive-torque value.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: March 17, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Takeshi Iijima, Yoshifumi Banno
  • Patent number: 8981690
    Abstract: An electric power steering system includes short-circuit determination means for determining whether a short-circuit between an energization failure phase and one of the two phases other than the energization failure phase has occurred while assist force is being generated using the two phases other than the energization failure phase as energization phases. When the short-circuit determination means determines that the short-circuit has occurred, generation of the assist force is stopped.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: March 17, 2015
    Assignee: JTEKT Corporation
    Inventors: Hidenori Itamoto, Hirozumi Eki, Gempei Nakasone
  • Patent number: 8978815
    Abstract: An electric power steering apparatus includes a controller that controls, based on an assist command value, driving of a motor used to apply assist torque to a steering mechanism. The controller calculates a first assist component based on a steering torque transmitted to the steering mechanism and calculates a steered angle command value based on the steering torque. The controller executes feedback control to cause a steered angle of steerable wheels to agree with the steered angle command value, thereby calculating a second assist component. The controller calculates the assist command value based on a value obtained by adding the assist components. The controller estimates a grip factor of the wheels on a road surface on which the wheels are traveling based on the steering torque, a first assist torque determined based on the first assist component, and a second assist torque determined based on the second assist component.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: March 17, 2015
    Assignee: JTEKT Corporation
    Inventors: Isao Namikawa, Terutaka Tamaizumi
  • Patent number: 8977433
    Abstract: An electric power steering apparatus includes a first torque calculating unit for calculating a first torque command based on a steering torque detected by the steering torque detecting unit, a second torque command calculating unit for calculating a second torque command based on the wheel rotation speed, an emergency switching unit for outputting the second torque command instead of the first torque command when error of the rotation torque is detected, a wheel rotation speed error detecting unit for detecting an error of the wheel rotation speed based at least on the wheel rotation speed, the steering torque in a normal state and the motor rotation information, and an emergency command limiting unit for liming the second torque command when normal and the motor rotation information, and where error of the wheel rotation speed is detected, when the second torque command is selected by the emergency switching unit.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: March 10, 2015
    Assignee: NSK Ltd.
    Inventor: Atsushi Kojima
  • Patent number: 8977437
    Abstract: A target pinion angle computation unit computes a target pinion angle on the basis of a basic assist component and a steering torque, and computes the target pinion angle so as to rapidly increase a steering reaction force when it is determined based on the target pinion angle that a rack shaft of a rack-and-pinion mechanism reaches a position near a limit of a movable range of the rack shaft. In an EPS, a correction component for the basic assist component, which is necessary to increase the steering reaction force rapidly, is computed through execution of PID control for causing an actual pinion angle to coincide with the target pinion angle. Because the correction component is added to the basic assist component, the steering reaction force is increased rapidly when the rack shaft reaches the position near the limit of the movable range.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: March 10, 2015
    Assignee: JTEKT Corporation
    Inventors: Terutaka Tamaizumi, Hirozumi Eki, Masayuki Kita, Isao Namikawa
  • Patent number: 8972112
    Abstract: A steering control method is provided. The method includes determining a dynamic load on a steering system based on a dynamic model; and controlling the steering system based on the dynamic load.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: March 3, 2015
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Siddharth H. D'Silva, Jon D. Demerly
  • Patent number: 8972115
    Abstract: A motor driven power steering (MDPS) may include: a vehicle speed sensor configured to sense vehicle speed; a temperature sensor configured to sense a temperature of a power pack; a current sensor configured to sense an amount of current applied to the MDPS; a storage unit configured to store a thermal resistance value based on the vehicle speed with respect to the temperature of the power pack; and a control unit configured to calculate an estimated temperature by reflecting the thermal resistance value based on the vehicle speed with respect to the temperature of the power pack and the current amount applied to the MDPS into a temperature estimation function, and drive a motor according to the calculated estimated temperature.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: March 3, 2015
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Se Wook Oh
  • Patent number: 8967321
    Abstract: An electric power steering apparatus includes an electric motor configured to apply an assist torque to an steering system of a motor vehicle, a rotational quantity detection unit for detecting a rotational quantity of the electric motor while the rotational quantity detection unit is in a wake-up state, and a counter electromotive voltage detection unit for detecting a counter electromotive voltage of the electric motor. When a main power supply of the electric power steering apparatus is turned off, the rotational quantity detection unit enters into a sleep state, and when a prescribed condition is established based on the counter electromotive voltage detected by the counter electromotive voltage detection unit, the rotational quantity detection unit transitions from the sleep state to the wakeup state.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: March 3, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yoshifumi Banno, Masahiko Niki, Takeshi Iijima, Kazutaka Saito, Yoshinobu Mukai
  • Patent number: 8967320
    Abstract: A steering device for a motor vehicle is provided. The steering device comprises a steering wheel, a superposition gearing and a gearing housing, wherein the superposition gearing is arranged in the gearing housing. The superposition gearing is designed to transmit a motor-driven adjusting movement to a steering shaft. The steering wheel forms a steering wheel base which serves for a connection to the steering shaft. It is provided that at least one constituent of the gearing housing, which constituent serves for mounting and/or fixing a gearing element of the superposition gearing or of a drive motor, is integrated into and formed in one piece with the steering wheel base of the steering wheel.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: March 3, 2015
    Assignee: Takata-Petri AG
    Inventor: Dieter Markfort
  • Patent number: 8960364
    Abstract: Disclosed are a pinion sensor assembly and an electric power steering apparatus having the same. According to the present invention, it is possible to substantially reduce the number of constitutional elements to be assembled when assembling a torque sensor and neighboring elements, to reduce an error in change of torque caused by accumulation of assembling errors of the constitutional elements, thereby preventing a malfunction, and to enhance assemblability.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: February 24, 2015
    Assignee: Mando Corporation
    Inventor: Sung Ho Ji
  • Patent number: 8960363
    Abstract: Disclosed is an electric power steering device capable of applying a prescribed steering assist force to a steering assembly, even when a torque sensor is out of order and the electric power steering device is in a state of being unable to sense steering torque by the torque sensor. Using an angle of rotation of a rotating element, which is detected by a resolver that serves as a rotating element angle of rotation sensing unit of a motor, a steering angle and a steering angular velocity are estimated, and a prescribed steering assist force is applied to a steering assembly by the motor, on the basis of an estimated steering angle and/or an estimated steering angular velocity.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: February 24, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Fumihiro Morishita, Takuji Wada, Hiroaki Horii, Hiroki Sagami, Kyoji Hamamoto, Shinji Hironaka
  • Patent number: 8954233
    Abstract: A vehicle body drifting suppression device including a steering torque detection unit which detects a steering torque of a vehicle, wherein a vehicle body drifting suppression is performed according to a vehicle body drifting suppression control-amount, and the vehicle body drifting suppression control-amount is adjusted according to a temporal sustention status of the steering torque.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: February 10, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yoshifumi Nakamura, Norio Yamazaki, Shigenori Takimoto, Yoshimichi Kawamoto