With Condition Modulated Steering Patents (Class 180/421)
  • Patent number: 10996673
    Abstract: A method of control includes operating in autonomous mode and steering according to a tracking angle. The method also includes receiving a torque signal indicating a measured torque being applied to a steering control device and determining a difference between an expected torque and the measured torque, and based on a direction of the expected torque, the direction of the measured torque, and the difference between the two, switching from autonomous mode of operation to manual mode operation.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: May 4, 2021
    Assignee: Apple Inc.
    Inventors: Diomidis Katzourakis, Ioannis N. Tzortzis
  • Patent number: 10940851
    Abstract: The technology relates to determining the current state of friction that a vehicle's wheels have with the road surface. This may be done via active or passive testing or other monitoring while the vehicles operates in an autonomous mode. In response to detecting the loss of traction, the vehicle's control system is able to use the resultant information to select an appropriate braking level or braking strategy. This may be done for both immediate driving operations and planning future portions of an ongoing trip. For instance, the on-board system is able to evaluate appropriate conditions and situations for active testing or passive evaluation of traction through autonomous braking and/or acceleration operations. The on-board computer system may share slippage and other road condition information with nearby vehicles and with remote assistance, so that it may be employed with broader fleet planning operations.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: March 9, 2021
    Assignee: Waymo LLC
    Inventors: David Harrison Silver, Jens-Steffen Ralf Gutmann, Michael James
  • Patent number: 10821946
    Abstract: An apparatus for operating a pedestrian detection and collision mitigation system (PDCMS) function of a vehicle includes: a front detection sensor detecting a presence of a pedestrian on a driving lane of the vehicle and a distance and a relative speed between the pedestrian and the vehicle; a vehicle sensor detecting a speed of the vehicle; an electronic control unit operating a PDCMS function based on information detected by the front detection sensor and the vehicle sensor; and a warning unit operated to inform a driver of a collision of the pedestrian with the vehicle by a control of the electronic control unit.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: November 3, 2020
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Yoon Soo Kim, Seung Wook Park, Wan Jae Lee, Min Byeong Lee, In Yong Jung, Kang Hoon Lee
  • Patent number: 10814840
    Abstract: An apparatus includes a front detection sensor detecting presence of a pedestrian on a driving lane of the vehicle, gaze information of the pedestrian, and a distance and a relative speed between the pedestrian and the vehicle; a vehicle sensor detecting at least one of a speed, an acceleration, a steering angle, a steering angular velocity, or a pressure of a master cylinder of the vehicle; an electronic control unit activating a function of a pedestrian detection and collision mitigation system based on information detected by the front detection sensor and the vehicle sensor; and a warning unit operated to inform a driver of a collision of the pedestrian with the vehicle by controlling the electronic control unit.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: October 27, 2020
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Yoon Soo Kim, Suk Ki Min, Dong Hyun Sung, In Yong Jung, Seung Wook Park, Sang Min Lee, Kang Hoon Lee, Wan Jae Lee, Tae Young Lee, Min Byeong Lee, Eung Seo Kim, Yong Seok Kwon
  • Patent number: 10766518
    Abstract: A rotation control system for a steering wheel is provided. The rotation control system includes a steering wheel and a steering shaft operatively coupled to the steering wheel. The rotation control system also includes at least one component operatively coupled to the steering shaft configured to switch the steering wheel between a rotational condition and a non-rotational condition.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: September 8, 2020
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Frank P. Lubischer, Richard K. Riefe
  • Patent number: 10710630
    Abstract: A modification system is provided for modifying the steering ratio for a vehicle having a tiltable telescopic boom arm (6). The vehicle has steered wheels (11), a steering wheel, and a steering transmission device serving to transmit steering movement between the steering wheel and the steered wheels (11) with a steering ratio R=Alpha/Beta. Beta is the steering angle of the wheels, and Alpha is the turning angle of the steering wheel. The system includes a sensor configured to determine a parameter relating to the telescopic arm. A control module controls the steering ratio that is configured to modify the steering ratio R as a function of the parameter relating to the telescopic arm. A wheeled vehicle is provided, fitted with such a steering ratio modification system.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: July 14, 2020
    Assignee: MANITOU BF
    Inventors: Antoine Riot, Mickael Christiny
  • Patent number: 10696324
    Abstract: According to one example, a control system is disclosed. The system can include a steering system configured to direct a movement of a compactor within a compacting area. The system can include one or more sensors configured to generate data indicative of operational criteria of the compactor, the one or more sensors including a speed sensor configured to measure a speed of the compactor over a surface within the compacting area and a controller communicatively coupled to the one or more sensors. The controller can be configured to: receive data indicative of the speed of the compactor from the speed sensor, determine if the speed of the compactor exceeds a first threshold speed, and if the speed of the compactor exceeds the first threshold speed, control the steering system to limit a turning angle to a predetermined value such that a turning radius of the compactor is increased.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: June 30, 2020
    Assignee: Caterpillar Paving Products Inc.
    Inventor: Nicholas A. Oetken
  • Patent number: 10689025
    Abstract: A steering device for a motor vehicle is described, the steering device comprising a steering element for steering the motor vehicle, and an actuating element by means of which wheels of the motor vehicle are adjusted as a function of an actuation of the steering element. The steering element has a steering assist unit associated with it, in particular an electronic steering assist unit for active return of the steering element, the steering assist unit comprising a motor and an open- and closed-loop control unit which drives the motor for generating an assist torque. The open- and closed-loop control unit receives data from a first sensor which directly senses the position of the actuating element, and drives the motor as a function of the position of the actuating element. Further described is a method of controlling a steering device.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: June 23, 2020
    Assignee: TRW AUTOMOTIVE GMBH
    Inventors: Keiwan Kashi, Catharina Burdessa
  • Patent number: 10589774
    Abstract: A steering column assembly configured to couple to a steering wheel is provided. The assembly includes a steering column shaft having a first end and a second end, the second end configured to couple to the steering wheel. The assembly also includes an intermediate shaft coupled to the steering column shaft first end. The assembly further includes a steering input pinion coupled to the intermediate shaft. The assembly yet further includes a counter rotation mechanism configured to counter rotate rotational movement of the steering column assembly such that the steering wheel does not rotate.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: March 17, 2020
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Eric D. Pattok, Joen C. Bodtker
  • Patent number: 10427691
    Abstract: The invention concerns a method for determining the direction of longitudinal travel of a vehicle comprising a step (a) of collecting a first signal (Signal1), representative of a first driving parameter, such as the steering-wheel torque, and of which the sign of the value and/or the sign of the variations is not dependent on the direction of longitudinal travel of the vehicle, a step (b) of collecting a second signal (Signal2), representative of a second driving parameter separate from the first driving parameter, such as the yaw rate, and of which the sign of the value and/or the sign of the variations changes on the basis of the direction of longitudinal travel of the vehicle, then a step (c) of comparing signs during which the sign of the value, or of the variation, of the first signal (Signal1) is compared with the sign of the value, or of the variation, of the second signal (Signal2) in order to deduce therefrom the direction of longitudinal travel of the vehicle, depending on whether said signs are id
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: October 1, 2019
    Assignee: JTEKT EUROPE
    Inventors: Stephane Cassar, Romain Moretti, Luc Leydier
  • Patent number: 10414433
    Abstract: Technical solutions are described for generating a damping torque in a magnetic torque overlay (MTO) steering system. An example method includes generating a damping torque based on a vehicle speed value, a handwheel velocity value, and a differential pressure value. The method further includes detecting an off-road condition, and in response, computing an off-road damping torque signal based on one or more of the vehicle speed value, the handwheel velocity value, the differential pressure value, and a handwheel angle value. The method also includes scaling the damping torque by the off-road damping torque signal in response to detecting the off-road condition.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: September 17, 2019
    Assignee: Steering Solutions IP Holding Corporation
    Inventor: Joel E. Birsching
  • Patent number: 10407058
    Abstract: An automobile cornering rollover prevention system comprises a speed controller, a wheel deflection measuring instrument mounted on a front wheel of the automobile, force sensors mounted on axis positions of four wheels, and an angular speed measuring instrument and a speed controller mounted on the front wheel of the automobile, and the wheel deflection measuring instrument, the angular speed measuring instrument and the force sensor are all electrically connected to the speed controller. The speed controller is connected to a brake system of the automobile, so that the speed can be intelligently reduced through the brake system. When a driver changes ?1 according to a road condition, the speed controller may calculate a critical radius in real time and then compare the speed and give a command in real time for controlling the speed, so that the speed is maintained in an ideal range.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: September 10, 2019
    Assignee: YANCHENG INSTITUTE OF TECHNOLOGY
    Inventor: Fuhao Liu
  • Patent number: 10399597
    Abstract: Technical solutions are described for a payload detection module that detects payload using one or more steering system control signals and generates an axle load factor. An example payload detection module includes a rack torque module to determine a rack torque, a reference model module to determine a reference rack torque for the steering system based on a load scale factor, and a load factor calculation module to compute the axle load factor based on a difference between the rack torque and the reference rack torque. Further, a blend factor module determines a load blend factor according to the axle load factor. Further yet, a signal combiner combines a blended nominal base assist and a blended highload base assist according to the load blend factor, the combination modifying a motor torque command, the motor torque command being sent to a motor to generate assist torque.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: September 3, 2019
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Tejas M. Varunjikar, Anthony J. Champagne, Qi Wang
  • Patent number: 10363955
    Abstract: A control device is configured for use in a steering system in a vehicle with electromotive servo assistance. The control device includes control device elements and electronic components for actuating a servo motor arranged in each control device element. The control device has chambers configured to accommodate the electronic components of the control device elements. The chambers are sealed off from one another in a watertight manner at least up to a defined filling level. The electronic components of the control device elements are split over different chambers.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: July 30, 2019
    Assignees: Robert Bosch Automotive Steering GmbH, Robert Bosch GmbH
    Inventors: Eugen Sworowski, Gebhard Hudelmaier
  • Patent number: 10308281
    Abstract: The invention relates to a method for compensating a stick-slip effect in the case of a recirculating ball steering system (20) having a steering housing (22), in which a steering piston (24) is supported between a first working chamber (34) and a second working chamber (36), wherein the steering piston (24) has a toothed region (26) on the steering-piston outer wall of the steering position, with which toothed region teeth (28) of a segment shaft (30) mesh, the steering piston (24) can be moved along a longitudinal axis X-X, the working chambers (34, 36) are connected to a control valve (39) by means of pressure-medium lines in order to provide steering assistance, the control valve (39) is connected to a processor unit (40), by means of which valves of the control valve (39) can be actuated, and the processor unit (40) is connected to a sensor (42), which determines rotation of the steering column both in a first direction of rotation and in a second, opposite direction of rotation.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: June 4, 2019
    Assignee: Tedrive Steering Systems GmbH
    Inventors: Jens-Hauke Muller, Olaf Schulte, Sven Kirschbaum
  • Patent number: 10207734
    Abstract: A behavior control apparatus for a vehicle, comprising a control unit that controls braking/driving forces of wheels so that the magnitude of a deviation between a steering angle and a steering angle conversion value of a yaw rate decreases when it is determined that the deviation exceeds a threshold value in magnitude and the vehicle is in an understeer state; the vehicle has a steering device including a variable gear ratio type rack bar; and, when the sign of the steering angle is the same as the sign of the offset amount and the zero point offset amount exceeds a reference value in magnitude, the control device corrects at least one of the threshold value and the magnitude of the deviation according to the steering angle and the zero point offset amount so that it becomes difficult to determine that the magnitude of the deviation exceeds the threshold value.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: February 19, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryochi Watanabe
  • Patent number: 10112609
    Abstract: A collision avoidance apparatus includes a control unit that is configured to perform a collision avoidance process. The control unit determines whether or not an object is present ahead of the own vehicle. When the control unit determines that an object ahead is present, the control unit determines whether or not there is a likelihood of a collision between the object ahead and the own vehicle and whether or not a corner is present ahead of the own vehicle. When the control unit determines that a corner is not present and when a predetermined collision avoidance condition is established, the control unit is capable of changing a travelling direction of the own vehicle to avoid collision between the object ahead and the own vehicle. When the control unit determines that a corner is present, the control unit does not perform a travelling direction change of the own vehicle.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 30, 2018
    Assignee: DENSO CORPORATION
    Inventor: Yasuhiko Mukai
  • Patent number: 10077070
    Abstract: A power-source voltage diagnostic device of an electric power steering apparatus that improves the performance for the anomalous detection of the motor power-source voltage VR-detecting circuit and is capable of continuing the assist control even if the extraordinary state is detected. When the failure (extraordinary state) detection of the VR-detecting circuit is performed by using the correlation between Vbat1-voltage obtained by the detecting section (Vbat1-detecting circuit) to detect the control voltage from the control power-source circuit and VR-voltage obtained by the detecting circuit (VR-detecting circuit) to detect the motor power-source voltage from the power source circuit, multiplexing is performed by providing VR-detecting circuits (VR-detecting circuit 1, VR-detecting circuit 2) of two systems and mutually comparing them so as to accurately perform the failure diagnosis of the VR-detecting circuits.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: September 18, 2018
    Assignee: NSK LTD.
    Inventors: Kyosho Uryu, Shin Kumagai
  • Patent number: 10046770
    Abstract: Systems and methods for independently estimating a road surface friction coefficient value and a vehicular lateral velocity value are provided. In one example, the system includes: a self-aligning torque coefficient estimating module configured to obtain sensor signals from an electronic power steering (EPS) system and an inertial measurement unit and estimate a first self-aligning torque coefficient value based on the sensor signals using a recursive least square algorithm; a road surface friction coefficient value estimating module configured to obtain the estimated first self-aligning torque coefficient value and estimate a first road surface friction coefficient value based on the estimated first self-aligning torque coefficient value; and a feature control module configured to generate one or more control signals configured to control features of a vehicle based on the estimated first road surface friction coefficient value.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: August 14, 2018
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventor: Yadollah Sabri
  • Patent number: 9903931
    Abstract: In a diagnostic device, a determiner determines whether a rotational speed of an AC motor is within a low rotational-speed range in which its rotational speed is approximately zero. An input-voltage estimate calculator calculates, as an input-voltage estimate, an estimate of an input voltage to an inverter when it is determined that the rotational speed of the AC motor is within the low rotational-speed range. A malfunction determiner performs a diagnostic task. The diagnostic task calculates an absolute value of a difference between an input-voltage measurement value measured by an input voltage sensor and the input-voltage estimate. The diagnostic task determines whether the absolute value of the difference is higher than a predetermined voltage threshold. The diagnostic task determines that there is a malfunction in the input voltage sensor upon determining that the absolute value of the difference is higher than the predetermined voltage threshold.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: February 27, 2018
    Assignee: DENSO CORPORATION
    Inventors: Ryuji Omata, Yuri Murata
  • Patent number: 9862411
    Abstract: A control system and method for a hydraulic-power steering system of a vehicle including magnetic torque overlay (MTO) is provided. The control system and method minimize undesirable vibration in a handwheel of the vehicle as a result of disturbance in its front road wheels (e.g., road-wheel imbalance). In the control system and method, a base torque command is determined or generated. At least the base torque command is passed to a disturbance-rejection module. The disturbance-rejection module modifies the base torque command to minimize the vibration.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: January 9, 2018
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Joel E. Birsching, Anthony J. Champagne, Michael K. Hales
  • Patent number: 9840253
    Abstract: An environmental sensing system relating to vehicle lane position includes first and second sensors respectively configured to provide first and second signals indicative of a vehicle lane position. A steering system achieves a desired lane position in response to a command from a controller to keep the vehicle in its lane, for example, during autonomous control of the vehicle. The controller uses the first signal if the first sensor provides a desired lane marker confidence. The controller switches to the second sensor and uses the second signal if the first sensor cannot provide the desired lane marker confidence and the second sensor can provide the desired lane marker confidence.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: December 12, 2017
    Assignee: DELPHI TECHNOLOGIES, INC.
    Inventors: Premchand Krishna Prasad, Jeremy S. Greene, Paul R. Martindale
  • Patent number: 9836052
    Abstract: Aspects of the disclosure relate to determining whether a feature of map information. For example, data identifying an object detected in a vehicle's environment and including location coordinates is received. This information is used to identify a corresponding feature from pre-stored map information based on a map location of the corresponding feature. The corresponding feature is defined as a curve and associated with a tag identifying a type of the corresponding feature. A tolerance constraint is identified based on the tag. The curve is divided into two or more line segments. Each line segment has a first position. The first position of a line segment is changed in order to determine a second position based on the location coordinates and the tolerance constraint. A value is determined based on a comparison of the first position to the second position. This value indicates a likelihood that the corresponding feature has changed.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: December 5, 2017
    Assignee: Waymo LLC
    Inventors: David Harrison Silver, David I. Ferguson
  • Patent number: 9819293
    Abstract: A voltage sensor abnormality diagnosis apparatus is applied to a motor controller operating switching of inverter by a switching signal for complementary on and off and diagnoses abnormality of input voltage sensor. An input voltage estimated value calculation section calculates input voltage estimated value by multiplying voltage command amplitude deviation by conversion coefficient, the voltage command amplitude deviation being obtained by subtracting theoretical voltage command amplitude, which is amplitude of theoretical voltage command calculated by using a motor model expression, from a control voltage command amplitude, which is an amplitude of a control voltage command calculated by feedback control and has been corrected by the dead time correction amount. An abnormality determination section determines that the input voltage sensor is abnormal if an absolute value of a difference between an input voltage sensor value and the input voltage estimated value is larger than a voltage threshold value.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: November 14, 2017
    Assignee: DENSO CORPORATION
    Inventors: Ryuji Omata, Yuri Murata
  • Patent number: 9595197
    Abstract: The present invention provides a lateral control apparatus including: an offset measuring unit that measures current lateral offsets of at least two other vehicles at a current time based on a center of a driving lane; a preview offset calculating unit that predicts a lateral offset of the other vehicle based on the center of the driving lane based on a location and a speed of the other vehicle at a time when a predetermined time has elapsed to calculate a preview offset; a priority determining unit that determines a priority of the other vehicles based on a difference between the lateral offset and the preview offset; and a controller that generates a route for lane keeping control of own vehicle based on the lateral offset of the other vehicle to which a top priority is assigned by the priority determining unit.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: March 14, 2017
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Jun Han Lee
  • Patent number: 9463827
    Abstract: An electric power steering apparatus provides a steering assist force to the steering system of a vehicle by controlling driving of an assist motor in accordance with a steering force acting on the steering wheel. The electric power steering apparatus includes a yaw rate sensor that obtains a measured yaw rate of the vehicle, a vehicle speed sensor that detects the speed of the vehicle, a steering angle sensor that detects the steering angle of the steering wheel, and a torque estimating apparatus that estimates a self-aligning torque on the basis of the vehicle speed and data having a smaller absolute value among the measured yaw rate and the steering-angle standard yaw rate and that corrects the steering assist force on the basis of the estimated self-aligning torque.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: October 11, 2016
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Ryota Mose, Norifumi Tamura
  • Patent number: 9387872
    Abstract: Provided is a method of controlling a vehicle equipped with individual steering devices and individual rotational force generating devices for respective wheels. According to the method, operation of at least one group of the steering devices and the rotational force generating devices is controlled in response to electrical control signals generated according to a user's command, so that control of the wheels starts at separate points in time.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: July 12, 2016
    Assignee: Hanwha Techwin Co., Ltd.
    Inventor: Hee-Seo Chae
  • Patent number: 9321484
    Abstract: A collision avoidance assistance device includes a target control amount calculation unit configured to calculate a target control amount used for travelling on a target trajectory through which the vehicle passes, a first control amount calculation unit configured to calculate a first control amount to be applied by the first steering assistance system out of the target control amount, and output the first control amount to the first steering assistance system, and a second control amount calculation unit configured to calculate a second control amount to be applied by the second steering assistance system out of the target control amount, and output the second control amount to the second steering assistance system. The first control amount is set to be larger than the second control amount during a predetermined time period from a time of starting the collision avoidance assistance.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: April 26, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kohei Morotomi, Eiji Kasai, Tomonori Akiyama
  • Patent number: 9260132
    Abstract: A steering apparatus includes: a steering angle zero point detection unit configured to detect a zero point of a steering angle of a steering wheel; a history recording unit configured to record a detection history of the zero point; a characteristic variation determination unit configured to determine whether or not characteristic variation has occurred in a steering transmission system on the basis of the detection history; a pressure measurement unit configured to measure a pressure in one of a master cylinder and a wheel cylinder that apply a braking force to a vehicle wheel; and a prohibition unit configured to prohibit for a predetermined prohibition period one of detection of the zero point by the steering angle zero point detection unit and updating of the detection history by the history recording unit, when the pressure equals or exceeds a predetermined threshold.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: February 16, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Ryouchi Watanabe
  • Patent number: 9211907
    Abstract: A solenoid valve device includes: a solenoid valve that includes a solenoid that is supplied with driving current to generate magnetic flux, and a valve element that is moved by the magnetic flux generated from the solenoid; and a control device that controls the solenoid valve. The control device includes an alternating current component in the driving current and supplies the driving current including the alternating current component to the solenoid, and detects an impedance of the solenoid.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: December 15, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Ryouichi Kubo, Masahiko Sakamaki
  • Patent number: 9150246
    Abstract: A system and method for converting a vehicle steering angle command to a vehicle steering torque command for a vehicle steering system in a vehicle. The method estimates a self-aligning torque that defines the torque that maintains a vehicle steering wheel at a neutral steering position or to a position that makes no slip angle at the road wheel, applies known total steering torque commands to the steering system at a plurality of sample time steps where the known steering torque commands include the self-aligning torque, and measures a vehicle steering angle at each time step. The method then models the steering system of the vehicle using the torque commands, the measured steering angles, a system delay and a plurality of unknown parameters.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: October 6, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Jin-Woo Lee, Youssef A. Ghoneim
  • Patent number: 9084388
    Abstract: For controlling supply priorities, a hydraulic system includes several loads, a pump, and a tank. One load has a first-level supply priority, and optionally a second load has a second-level supply priority subordinate to the first level. A third load has a third-level supply priority subordinate to the second level. Each load can be connected to the pump by a separate supply line. The supply lines for the first and the optional second load are connected to the pump by a common load-pressure-controlled priority valve and the supply line for the third load is connected to the pump by an additional load-pressure-controlled priority valve. A first load-pressure line leading to the pump is connected to a load-pressure line of the third hydraulic load and to a second load-pressure line.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: July 21, 2015
    Assignee: DEERE & COMPANY
    Inventor: Marcus Bitter
  • Patent number: 9079609
    Abstract: A first valve opening degree correction value computation unit computes a correction value (first valve opening degree correction value) for the absolute value of a valve opening degree command value on the basis of a rotation speed deviation computed by a rotation speed deviation computation unit in a pump driving motor control unit. A second valve opening degree computation unit computes a correction value (second valve opening degree correction value) for the valve opening degree command value on the basis of the sign of the valve opening degree command value and the first valve opening degree correction value. A correction value addition unit adds the second valve opening degree correction value to the valve opening degree command value set by the valve opening degree command value setting unit.
    Type: Grant
    Filed: April 3, 2013
    Date of Patent: July 14, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Keisuke Izutani
  • 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
  • Publication number: 20150047919
    Abstract: In one aspect of the invention, a power steering assist system is provided. The system includes a housing, an actuator assembly, a rotary valve assembly, a bearing assembly, a differential pressure transducer, and a coupler. The coupler includes a first end and a free second end, the free second end extending from the housing and configured to couple to a component of a steering gear system.
    Type: Application
    Filed: August 14, 2014
    Publication date: February 19, 2015
    Inventors: Jason A. Dutsky, Joel E. Birsching, Martin P. Sheridan
  • Patent number: 8897966
    Abstract: Embodiments of the invention provide methods and apparatus for reducing steering effort in a vehicle. In one embodiment, a method for installing a steering-assist system onto a vehicle having an electrically powered steering system is provided. The method includes placing a controller between a torque sensor and an electronic control unit (ECU) disposed on the vehicle, coupling a primary signal line from the torque sensor to be in electrical communication with the controller, and coupling a secondary signal line to the controller to be in electrical communication with the ECU, wherein, when movement is detected by the torque sensor, the torque sensor provides a primary signal to the controller and the controller provides a secondary signal to the ECU, the secondary signal being different than the primary signal.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: November 25, 2014
    Inventors: Carlos A. Saez, Alejandro Javier Goldsmith Llorenz, Neil Emerson Rollano Conde
  • Publication number: 20140332309
    Abstract: Disclosed is a steering system which is capable of ensuring that a wheeled excavator travels straight while being driven on a paved road. The steering system for wheeled construction equipment includes: a hydraulic oil pump; a steering motor connected to the hydraulic oil pump; a steering valve controlling the operation of the steering motor; a steering handle operating the steering motor and the steering valve according to steering manipulation by the driver; and a steering cylinder steered by the manipulation of the steering handle. The steering system further includes an idle mode control unit which converts working mode into a steering mode not having straight line driving recovery performance when working mode, in which working and driving are enabled, is selected, and which converts exclusive driving mode into a steering mode having the straight line driving recovery performance through a signal input when the exclusive driving mode, in which only driving is enabled, is selected.
    Type: Application
    Filed: December 13, 2011
    Publication date: November 13, 2014
    Applicant: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventors: Hyung-Seok Park, Sung-Yong Jo
  • Publication number: 20140332308
    Abstract: A power steering assembly having an input shaft for connection to a steering wheel, an output shaft coupled to the input shaft for operational engagement with a steering rod, a servo controller, an actuator, a sensor system, and an evaluation unit for evaluating measurement values provided by the sensor system. The coupling between input and output shafts permits a relative rotation therebetween. The servo controller has a rotatable final control element with and driven by the output shaft. The steering force assistance is controlled depending on relative rotation between the input shaft and control element. The engagement between the output shaft and control element provides a relative displacement therebetween. The actuator relatively displaces the control element in relation to the output shaft. The sensor system measures at least one differential angle between the control element and output shaft or between the control element and input shaft.
    Type: Application
    Filed: January 7, 2013
    Publication date: November 13, 2014
    Inventors: Sven Kirschbaum, Jens-Hauke Muller
  • Patent number: 8874322
    Abstract: A vehicle steering controller includes a shape recognizer that recognizes a shape of a road on the basis of a captured image, a steering control unit that controls steering of a vehicle on the basis of the shape of the road recognized by the shape recognizer, and a determiner that determines whether or not the shape of the road recognized by the shape recognizer is that of a transitional section between a curved road section and a linear road section. If the determination made by the determiner is negative, then the shape recognizer recognizes the shape of the road by performing an approximation using an approximation expression having a degree of one or two, otherwise the shape recognizer recognizes the shape of the road by performing an approximation using an approximation expression having a degree of three.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: October 28, 2014
    Assignee: Honda Motor Co., Ltd
    Inventors: Naoki Mori, Tatsuya Ishikawa
  • Patent number: 8833506
    Abstract: A power steering apparatus including a power cylinder, first and second pumps, a control valve serving for selectively supplying a working fluid supplied from the first or second pump to one of a pair of pressure chambers of the power cylinder in accordance with a steering operation, first and second reservoir tanks, and a return passage changeover valve disposed between the control valve and the first and second pumps, the return passage changeover valve serving for communicating the first and second pumps with the control valve regardless of an axial position of a valve element and communicating one of the first and second reservoir tanks with the control valve in accordance with the axial position of the valve element to thereby carry out changeover between circulating fluid passages for circulating the working fluid to the first reservoir tank and the second reservoir tank.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: September 16, 2014
    Assignee: Hitachi Automotive Systems Steering, Ltd.
    Inventors: Sosuke Sunaga, Shogo Ishikawa
  • Patent number: 8783408
    Abstract: A pump rotation speed correcting unit includes a valve opening degree command differential value computing unit, a pump rotation speed correction value computing unit, and a correction value adding unit. The valve opening degree command differential value computing unit computes a temporal differential value of a valve opening degree command value that is set by a valve opening degree command value setting unit. The pump rotation speed correction value computing unit computes a correction value of a pump rotation speed command value on the basis of the valve opening degree command differential value. The correction value adding unit adds the pump rotation speed correction value to the pump rotation speed command value that is set by the pump rotation speed command value setting unit.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: July 22, 2014
    Assignee: JTEKT Corporation
    Inventor: Masahiko Sakamaki
  • Patent number: 8678129
    Abstract: A method for selectively charging and discharging a steering accumulator are provided. One vehicle steering system includes a hydraulic pump configured provide a source of pressurized hydraulic fluid for use in steering the vehicle. The steering system also includes an accumulator configured to hold pressurized hydraulic fluid from the pump for use in steering the vehicle in case of need. The steering system includes a charging circuit configured to selectively allow the hydraulic fluid to flow from the hydraulic pump to the accumulator based on a fluid pressure applied by a first pilot and a second pilot. The steering system includes a charging bypass circuit configured to allow the hydraulic fluid to flow to a steering control unit and to bypass the charging circuit. The hydraulic pump supplies fluid to the charging circuit and the bypass circuit.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: March 25, 2014
    Assignee: CNH America LLC
    Inventors: Jerry L. Brinkley, Adam R. Rusciolelli
  • Patent number: 8672085
    Abstract: A variable ratio transmission mechanism is used in an automobile. The automobile includes first and second steering shafts extending along a first direction. The variable ratio transmission mechanism includes a securing unit connected to the first steering shaft, a connecting unit connected to the second steering shaft, a motor connected to the securing unit and including a revolving shaft that extends rotatably along a second direction different from the first direction, and a transmitting unit including a worm gear that is provided on the connecting unit and a worm that is provided on the revolving shaft and that engages and is angularly-slidable relative to the worm gear.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: March 18, 2014
    Assignee: Automotive Research & Testing Center
    Inventors: Chien-Tai Huang, Yan-Sin Liao, Tsung-Hsien Hu
  • Patent number: 8676445
    Abstract: The present disclosure relates to computer-implemented methods of diagnosing a vehicle hydraulic power steering system and steering diagnostic systems for executing the same. Some exemplary diagnostic systems are configured to detect a steering system condition based on an evaluation of a steering pump outlet pressure, an engine speed and/or a steering wheel position. The system sends a warning signal when a predetermined steering system condition is detected.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: March 18, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Timothy Gerard Offerle, Daniel K. Tuttle
  • Patent number: 8666603
    Abstract: Methods and systems are described for providing steering-control feedback to an operator of an automotive vehicle. First attribute information is received that identifies a first attribute of a first operator coupling of an operator, of an automotive vehicle, to a steering-control mechanism of the automotive vehicle. A specified steering-control criterion is detected as met based on the first attribute. Feedback information is identified based on the steering-control criterion. In response to the detecting, the feedback information is sent to present, via an output device, a feedback indicator to the operator.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: March 4, 2014
    Assignee: Sitting Man, LLC
    Inventor: Robert Paul Morris
  • Patent number: 8666582
    Abstract: A vehicle steering feel improving apparatus is provided for a vehicle, wherein the vehicle is capable of running with a road wheel driven by a driving force from a power source. The vehicle steering feel improving apparatus includes a steering operation detecting means that detects a condition that steering operation is being performed to steer a steerable wheel of the vehicle. A driving force fluctuating means repeatedly fluctuates the driving force to the road wheel, while the steering operation detecting means is detecting the condition that steering operation is being performed.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: March 4, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yusuke Kageyama, Kazuhito Kato
  • Patent number: 8662241
    Abstract: An apparatus (10) for use in turning steerable vehicle wheels (14, 16) includes a hydraulic power steering motor (12). A pump (26) is connected in fluid communication with the hydraulic power steering motor (12) by a supply conduit (30). A continuously variable transmission (50) is connected with the engine (52) of the vehicle and with the pump (26). The continuously variable transmission (50) is operable under the influence of force transmitted from the engine (52) to drive the pump at a first speed when the flow of fluid from the pump (26) is at a first level. The continuously variable transmission (50) drives the pump (26) at a second speed different than the first speed when the flow of fluid from the pump is at a second level different than the first level.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: March 4, 2014
    Assignee: TRW Automotive U.S. LLC
    Inventor: Bruce C. Noah
  • Patent number: 8651224
    Abstract: An apparatus for use in turning steerable vehicle wheels includes a first pump driven by an engine of the vehicle to supply fluid under pressure to a power steering motor assembly through a supply conduit. A second pump driven by the engine of the vehicle supplies fluid under pressure to the power steering motor assembly when the flow of fluid in the supply conduit is below a predetermined value. The second pump is inactive when the flow of fluid in the supply conduit is above the predetermined value. The second pump has vanes located in slits. A valve which is in fluid communication with the slits has a first condition in which fluid under pressure is supplied to the slits. The valve has a second condition in which the slits are in fluid communication with a reservoir.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: February 18, 2014
    Assignee: TRW Automotive U.S. LLC
    Inventor: Bruce C. Noah
  • Patent number: 8606463
    Abstract: A hydraulic steering system for a vehicle includes a first steering member and a second steering member, wherein the first steering member is operationally connected to a first steering valve unit including a first steering valve, and wherein a priority valve controls a flow of a hydraulic fluid to one or more steering cylinders which provide for steering of the vehicle in a desired steering direction, wherein the priority valve gives priority to steering with the first steering member over the steeling with the second steering member. A second steering valve is provided functionally operable in series with a proportional flow control valve, wherein the second steering valve and/or the proportional flow control valve are controlled at least by the second steering member.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: December 10, 2013
    Assignee: Volvo Construction Equipment AB
    Inventors: Olivier Bichler, Frederic Lastre
  • Patent number: 8596407
    Abstract: An integral power steering apparatus includes a hydraulic actuator having a piston separating pressure chambers for steering assistance and a limiter valve to be opened by movement of the piston to fluidly connect the pressure chambers. The limiter valve includes an adjuster for adjusting a press-fit position of a spring pin press fit in a plunger. The adjuster includes a movable adjusting member formed with an abutting surface to abut against the plunger to limit rearward plunger movement when the movable adjusting member is at a first adjuster position, and a regulating member to hold the movable adjusting member at the first adjuster position at the time of adjustment, and to enable the movable adjusting member to move to a second adjuster position after adjustment.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: December 3, 2013
    Assignee: Hitachi Automotive Systems Steering, Ltd.
    Inventors: Shogo Ishikawa, Sosuke Sunaga