Control Of Power Distribution Between Vehicle Axis Or Wheels (e.g., Four Wheel Drive Vehicle) Patents (Class 701/69)
  • Patent number: 10994725
    Abstract: A four-wheel-drive vehicle including a powertrain operable to adjust a front- and rear-wheel driving force ratio that is a ratio between a driving force of front wheels and a driving force of rear wheels includes a control device that controls the powertrain and adjusts the front- and rear-wheel driving force ratio so as to reduce the driving force of the front wheels that are steered wheels, when it is detected that emergency avoidance to avoid collision with an avoidance target ahead in a traveling direction is necessary.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: May 4, 2021
    Assignee: JTEKT CORPORATION
    Inventor: Hiroki Yajima
  • Patent number: 10975924
    Abstract: Fluid control apparatus for use with vehicle clutches are disclosed. A disclosed clutch coupling assembly for a vehicle includes a housing defining a cavity. The clutch coupling assembly also includes a fluid reservoir fluidly coupled to the cavity. The clutch coupling assembly also includes a clutch positioned in the cavity. Rotation of the clutch is to convey a fluid from the cavity to the fluid reservoir. The clutch coupling assembly also includes a pump operatively coupled to the housing to control the fluid. Operation of the pump is to convey the fluid from the fluid reservoir to the cavity when the clutch is in an engaged state.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: April 13, 2021
    Assignee: JTEKT AUTOMOTIVE NORTH AMERICA, INC.
    Inventors: Patrick Desing, Shun Ono, Mike Kocevar, Junji Ando, Kenji Korenaga
  • Patent number: 10919387
    Abstract: A control apparatus configured to control a driving force transmission apparatus. The control apparatus includes a torque command value calculator configured to calculate a torque command value for the right and left rear wheels based on a front-rear wheel rotation speed difference, a command value limiter configured to limit the torque command value to a value equal to or smaller than an upper limit value, and a current controller configured to control a current to be supplied to the driving force transmission apparatus so that a driving force determined based on the torque command value is transmitted to the right and left rear wheels. When the front-rear wheel rotation speed difference increases, the command value limiter sets the upper limit value smaller as a change amount of the front-rear wheel rotation speed difference per unit time increases.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: February 16, 2021
    Assignee: JTEKT CORPORATION
    Inventor: Hirokazu Kondo
  • Patent number: 10871195
    Abstract: A control device for a torque distributor provided with a control means acquiring a demand value of a torque distributed to second driving wheels (W3, W4) using a torque distributor (10) and outputs a command value (TR) of torque corresponding to the demand value of torque. When a variation per unit time (ND) of a differential rotation speed (NS) between a drive source (3) side and a second driving wheel side with respect to the torque distributor in a torque transmission path (20) is a predetermined first threshold (ND1) or more, the control means (60) performs a torque command value limit control controlling the torque command value to a predetermined limit value (TR1) or less. This can secure the running stability necessary for the vehicle by distributing an appropriate torque to the second driving wheels using the torque distributor, while enabling proper protection of components including the torque distributor.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: December 22, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Masaru Komatsubara
  • Patent number: 10871773
    Abstract: A vehicle travel control apparatus including a road surface condition detector, a drive mode instruction switch instructing a manual drive mode or a self-drive mode and, an electric control unit having a microprocessor and a memory. The memory stores a driving characteristic of a driver during traveling in the self-drive mode, and the microprocessor performs generating an action plan including a target path of the vehicle, controlling an actuator so that the vehicle travels in self-driving in accordance with the action plan, and the generating including restricting a target value of a physical quantity for traveling of the vehicle included in the action plan, based on the detected road surface condition and the driving characteristic stored in the memory, when a switching from the manual drive mode to the self-drive mode is instructed by the drive mode instruction switch.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: December 22, 2020
    Assignee: Honda Motor Co., Ltd.
    Inventors: Toshiyuki Mizuno, Akira Kito, Yoshiaki Konishi, Takayuki Kishi
  • Patent number: 10859131
    Abstract: Controlling a multiplate clutch situated between an input shaft and an output shaft for the switchable transmission of torques, wherein in the event of a torque request and a subsequent engagement of the multiplate clutch, includes: a) determining a setpoint engagement force, acting in an axial direction, of the multiplate clutch for transmitting a setpoint torque to the output shaft; b) determining and setting a limiting engagement force that is less than the setpoint engagement force, and c) setting the setpoint engagement force in a time-delayed manner; wherein a transmission of an actual torque is achieved by limiting the setpoint engagement force to the limiting engagement force, so that a maximum actual torque that is transmitted upon engagement of the multiplate clutch exceeds a setpoint torque to be transmitted by at most 5%.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: December 8, 2020
    Assignee: GKN Automotive Ltd.
    Inventors: Volker Rene Ruiters, Andreas Langhanki, Rainer Brüning
  • Patent number: 10836372
    Abstract: A hybrid vehicle control system and method include a controller programmed to, while a transmission is in PARK or NEUTRAL, start an engine, close a disconnect clutch selectively coupling the engine to an electric machine, and control the electric machine to charge a traction battery in response to the accelerator pedal position exceeding an idle position and being less than a threshold. The controller controls transmission impeller speed in response to accelerator pedal position exceeding the threshold to allow revving the engine in response to accelerator pedal. A method for controlling a hybrid vehicle includes starting an engine, closing a clutch between the engine and an electric machine, and controlling the engine and the electric machine to either: i) charge a traction battery or ii) rev the engine based on accelerator pedal position relative to a threshold above an idle position while the transmission is in PARK or NEUTRAL.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: November 17, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Jason Meyer, Rajit Johri, Mark Steven Yamazaki, Mathew Alan Boesch, Chen Zhang
  • Patent number: 10807590
    Abstract: The control device of a four-wheel drive vehicle is applied to a four-wheel drive vehicle having a differential restriction device which can change a differential restriction degree between a front wheel rotary shaft and a rear wheel rotary shaft, a braking device can separately change a braking force of the front wheels and a braking force of the rear wheels. The control device determines whether a specific state which has a high possibility that a state where a rear wheel slip ratio becomes larger than a front wheel slip ratio is generated occurs assuming that the differential restriction degree is set to a first degree when the differential restriction degree is set to a second degree so as not to allow the differential operation and change the differential restriction degree from the second degree to the first degree when it is determined that the specific state has occurred.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: October 20, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryochi Watanabe
  • Patent number: 10787167
    Abstract: A drive force control system configured to achieve a yaw rate required by a driver. A first target yaw rate is calculated based on a steering angle, and a second target yaw rate is calculated based on a steering torque. A first target torque of a right wheel and a second target torque of a left wheel are calculated based on a first difference between the first target yaw rate and an actual yaw rate. the first target torque is corrected based on the second target yaw rate and the actual yaw rate to obtain a third target torque, and the second target torque is corrected based on the second target yaw rate and the actual yaw rate to obtain a fourth target torque. A controller transmit signals to the drive unit to achieve the third target torque and to achieve the fourth target torque.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: September 29, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu Nasu, Hiroshi Isono, Hidekazu Sasaki
  • Patent number: 10759277
    Abstract: A clutch control method is provided for a four-wheel-drive vehicle in which the main drive wheels are connected to a drive source, and the auxiliary drive wheels are connected via a friction clutch to the drive source. When the vehicle starts off due to an accelerator depressing operation, the friction clutch is engaged to distribute, a drive torque from the drive source to the main drive wheels and the auxiliary drive wheels. In this clutch control method, when the vehicle switches from a traveling state to a stopped state while maintaining in a travel shift position, a control is preformed to apply initial torque as an engagement torque control of the friction clutch while the vehicle is stopped. A magnitude of the initial torque is set to a magnitude that maintains a drive-system torsion state by transmitting torque to an auxiliary-drive-wheel drive system before the vehicle is stopped.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: September 1, 2020
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Koutarou Tanaka, Yuusuke Hirahata, Keishirou Nakamura, Kouki Saitou
  • Patent number: 10680845
    Abstract: Disclosed herein are system, method, and computer program product embodiments for interfacing with and managing IoT devices. An embodiment operates by requesting a list of device-specific capabilities from one or more IoT devices, providing a user interface by which users can view all available capabilities across the one or more IoT devices, and receiving a selected capability which subsequently executes on the appropriate IoT device.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: June 9, 2020
    Assignee: SAP SE
    Inventors: Alexander Ocher, Viktor Lapitski
  • Patent number: 10596902
    Abstract: A method of controlling implementation of a drift driving state of a vehicle, may include a slip inducement step, wherein in a state that drift mode is selected, when a vehicle enters into rotary driving and is in a power-on state, a controller reduces front wheel distribution torque of all-wheel drive (AWD) system in comparison to cases other than the drift mode; a slip torque control step, wherein when a rear wheel slip of the vehicle is generated, the controller allows the vehicle to enter into drifting by adding slip control torque according to lateral acceleration of the vehicle to the front wheel distribution torque; and a drift maintenance step, wherein when a counter steering state by a driver is confirmed, the controller maintains a drift driving state of the vehicle by releasing all the front wheel distribution torque.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: March 24, 2020
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION, HYUNDAI WIA CORPORATION
    Inventors: Sung Keun Lim, Ji Woong Yi
  • Patent number: 10538227
    Abstract: A method for controlling a vehicle deceleration depending on a differential slip between two vehicle axles in a vehicle with an ABS brake system includes detecting at least one of a target vehicle deceleration specified by the driver and an actual vehicle deceleration; and controlling a braking pressure on wheel brakes of a vehicle axle to be controlled by actuation of ABS brake valves in such a way that the braking pressure on the wheel brakes of the vehicle axle to be controlled is controlled depending on a detected actual differential slip, so that the actual differential slip corresponds to a target differential slip. The actual differential slip indicates a difference in a rotational behavior of the vehicle axle to be controlled relative to a further vehicle axle. The target differential slip is dependent on at least one of the detected actual vehicle deceleration and the detected target vehicle deceleration.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: January 21, 2020
    Assignee: WABCO GMBH
    Inventors: Andreas Boethel, Horst Eckert, Torsten Wallbaum
  • Patent number: 10513272
    Abstract: Various systems and methods for monitoring integrate circuits for failure are described herein. A system to monitor for potential component failure includes a sensor array interface to obtain a first safety level from a first sensor and a second safety level from a second sensor, the first and second sensors installed in a machine, the first and second safety levels indicating how safe the machine is to operate; and a processor to: obtain configuration parameters from a rule data store; combine the first and second safety levels using the configuration parameters to produce a composite safety level; and initiate a responsive action based on the composite safety level.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: December 24, 2019
    Assignee: Intel Corporation
    Inventors: Robert F. Kwasnick, Huy Le
  • Patent number: 10464417
    Abstract: A multi-axle drive device and method for operating a multi-axle drive device. The multi-axle drive device is provided with a synchronization clutch present in an operational connection between a first output shaft and a connecting shaft and at least one disconnecting clutch present in an operational connection between the connecting shaft and a second output shaft. The synchronization clutch and the disconnecting clutch are opened in a first operating state and closed in a second operating state. At the same time, with an intended change from the second operating state to the first operating state, the synchronization clutch is maintained at least partially opened and the separation clutch is maintained closed, so that, when a first operating mode is carried out, the disconnecting clutch is opened, and when a second operating mode is carried out, the synchronization clutch is closed again.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: November 5, 2019
    Assignee: AUDI AG
    Inventors: Dieter Weidemann, Heiko Hanickel, Florian Kolb, Hans Jörg Brühl
  • Patent number: 10363934
    Abstract: A series hydraulic hybrid driveline for a vehicle, having a hydraulic circuit with a first hydraulic displacement unit in fluid communication with a second hydraulic displacement unit, the first hydraulic displacement unit having a variable hydraulic displacement and the first hydraulic displacement unit being drivingly engaged with an internal combustion engine. A hydraulic accumulator assembly selectively fluidly connected to the hydraulic circuit, the hydraulic accumulator assembly having a high pressure hydraulic accumulator and a low pressure hydraulic accumulator. And a hydraulic actuator adapted to control the hydraulic displacement of the first hydraulic displacement unit, the hydraulic actuator being in fluid communication with the hydraulic accumulator assembly and/or with the hydraulic circuit.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: July 30, 2019
    Assignee: Dana Italia S.R.L.
    Inventors: Giulio Ornella, Fabrizio Zendri
  • Patent number: 10286780
    Abstract: A method for controlling a motor vehicle (1) operated in all-wheel drive at times, by means of a control unit (3), wherein the motor vehicle comprises a drive unit (11), a primary drive axle (14) permanently driven by the drive unit (11), a secondary drive axle (24), a torque transmission train (17, 17.1) for transmitting the torque of the drive unit (11) to the secondary drive axle (24), and a disconnect clutch (15) for coupling the secondary drive axle (24) to and uncoupling same from the drive unit (11), wherein the control unit (3) can actuate the disconnect clutch (15) via a first actuating unit (16), characterized by the following steps determining an all-wheel requirement for the motor vehicle from input signals if there is a predetermined all-wheel requirement, preparing an all-wheel operation, wherein the disconnect clutch (15) is not closed.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: May 14, 2019
    Assignee: MAGNA POWERTRAIN GMBH & CO KG
    Inventor: Johannes Quehenberger
  • Patent number: 10288166
    Abstract: A soft underfoot conditions response system for use with a vehicle includes a plurality of sensors configured to transmit signals indicative of live data representing at least one of real time vehicle speed, vehicle acceleration, vehicle pose, vehicle payload, engine torque, engine power output, and engine RPM, and a controller communicatively coupled with the sensors. The controller is programmed to receive the live data, receive reference data representative of soft underfoot conditions from a database, and analyze the live data and the reference data.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: May 14, 2019
    Assignee: Caterpillar Inc.
    Inventors: Addwiteey Chrungoo, Sandesh Gowda, Ananth Purushotham Kini, Philip Carl Wallstedt, Kevin Anthony Davis
  • Patent number: 10227069
    Abstract: A method and a system for controlling a vehicle (100) with four-wheel drive are provided. The method includes: acquiring a vehicle condition information parameter by a vehicle condition information collector; obtaining a radius of turning circle to be reduced from a driver by a turning circle receiver (40); obtaining a controlling yaw moment corresponding to the radius of turning circle to be reduced according to the vehicle condition information parameter and the radius of turning circle to be reduced by a turning circle controller (11); and distributing the controlling yaw moment to four wheels (90) of the vehicle (100) according to an intensity level of the radius of turning circle to be reduced and the vehicle condition information parameter by the turning circle controller (11), such that the vehicle (100) turns circle.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: March 12, 2019
    Assignee: BYD COMPANY LIMITED
    Inventors: Yubo Lian, Heping Ling, Fanliang Meng, Mingchuan Shi, Weiqiang Chen
  • Patent number: 10220836
    Abstract: A drive control device of the vehicle controls a left and right driving force difference by a driving device based on a rotational velocity of a rotary electric machine, which imparts a steering force or a steering additive force to a steering system of the vehicle. Furthermore, at a time that there is a deviation or a likelihood of a deviation of the vehicle with respect to a travel path or when an avoidance assistance unit produces a notifying operation or imparts a deviation avoidance assistance steeling force or a deviation avoidance assistance steering additive force, the drive control device prohibits or suppresses control of the left and right driving force difference based on the rotational velocity.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: March 5, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Tomokazu Honda, Hitoshi Sasaki
  • Patent number: 10184537
    Abstract: The present disclosure provides a method for measuring clutch durability of an all wheel drive vehicle. The method includes: a damage degree securing step of accumulating and acquiring a damage degree of a clutch based on a clutch slip amount and clutch transfer torque when the clutch slips by a difference in rotary speed between a front wheel and a rear wheel; and a durability predicting step of predicting current durability of the clutch based on the difference between the accumulated and acquired damage degree and a reference damage degree of the corresponding clutch, an input shaft RPM of rotating the clutch, and a reference durability RPM of the clutch.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: January 22, 2019
    Assignee: HYUNDAI DYMOS INCORPORATED
    Inventor: Sang Chull Han
  • Patent number: 10137775
    Abstract: A vehicle includes a driveshaft, first axle, second axle, first clutch, second clutch, and controller. The driveshaft is selectively coupled to outputs of the first and second axles by the first and second clutches, respectively. The controller is programmed to, in response to a command to reconnect the driveshaft to the outputs of the first and second axles, close the second clutch to transfer loads from the second axle to the driveshaft, adjust the slip speed of the first clutch to within a target range, and close the first clutch.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: November 27, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Peter John Grutter, Vladimir Ivanovic, Paul Moubarak, Andreas Evangelos Perakes, Nicholas Edward McCubbin, Abhinav Kumar
  • Patent number: 10086678
    Abstract: A method and an apparatus for controlling a compressor are provided. The method includes measuring a vehicle speed, an engine speed, a position value of an accelerator pedal, and an external air temperature and comparing the vehicle speed with a predetermined speed. A basic operation rate of the compressor is then determined based on the engine speed and the position value of the accelerator pedal when the vehicle speed is equal to or less than the predetermined speed. A final operation rate of the compressor is determined based on the external air temperature and the determined basic operation rate and the compressor is operated based on the determined final operation rate.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: October 2, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Tae Hun Jung, Young Jun Kim, Jeong Sik Seo, Jaeyeon Moon, Hyuck Yong Kwon
  • Patent number: 10042815
    Abstract: A vehicle and vehicle system are provided with a controller that is configured to generate output indicative of a road gradient based on at least one of a first estimation, a second estimation and a third estimation. The road gradient is based on the first estimation when a vehicle speed is less than a speed threshold and an input indicative of a longitudinal acceleration is available. The road gradient is based on the second estimation when the vehicle speed is greater than the speed threshold and the longitudinal acceleration is available. The road gradient is based on the third estimation when the longitudinal acceleration is not available.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: August 7, 2018
    Assignee: Ford Global Technologies, LLC
    Inventor: Hai Yu
  • Patent number: 9950618
    Abstract: A controller of a four-wheel drive vehicle includes a first operation part that switches drive mode of the vehicle; a second operation part that switches off-road traveling modes indicating traveling modes for off-road driving of the vehicle; a transfer controller that controls the arrangement of a transfer device in accordance with the drive mode; a detector that detects the arrangement of the transfer device; a determiner that determines whether a switching of the traveling modes is permitted or not based on the drive mode and the arrangement detected by the detector; and a setter that sets the traveling modes of the vehicle based on the detected arrangement and input operations to the first operation part and the second operation part when the determiner determines the switching of the traveling modes is permitted, and maintains the current traveling mode when the determiner determines the switching of the traveling modes is not permitted.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: April 24, 2018
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Tomohiro Kawasaki, Takayuki Wako, Atsuro Hirayama, Tomo Kato, Wataru Tanabe, Shuichi Yoshida, Kei Asano, Yutaka Kohara
  • Patent number: 9873433
    Abstract: A controller comprises a memory, including a maximum rated driveshaft torque for a driveshaft on a vehicle, and an electrical output transmitting an output signal for limiting a torque on the driveshaft of the vehicle during an event while the vehicle is attempting to at least one of maintain and increase velocity. The torque on the driveshaft is limited by controlling braking pressure to at least one brake associated with driven wheels and/or controlling motor torque delivered to the driveshaft.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: January 23, 2018
    Assignee: Bendix Commercial Vehicle Systems LLC
    Inventors: Thomas S Miller, Jr., Nathan L Moseley
  • Patent number: 9821800
    Abstract: A processor for a vehicle includes a vehicle yaw moment instruction calculator, and a mode under which yaw moment of the vehicle is controlled. If the vehicle yaw moment instruction value generates the driving forces or the driving torques, the driving forces or driving torques are different between the left and right wheels. If the vehicle yaw moment instruction value generates the braking forces or the braking torques, the braking forces or the braking torques are different between the left and right wheels. The mode operates at least in transit region between daily region and limit region.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: November 21, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Makoto Yamakado, Mitsuhide Sasaki, Mikio Ueyama, Keiichiro Nagatsuka
  • Patent number: 9823278
    Abstract: A fault detecting apparatus, to use an output current from a drive circuit as a current value detected by a current sensor, calculates a duty ratio of a control signal to be supplied to the drive circuit to define the duty ratio as a theoretical value of the duty ratio of the control signal. The fault detecting apparatus compares a duty ratio of a control signal actually supplied to the drive circuit with the theoretical value of the duty ratio of the control signal to determine whether the current sensor (fails on the basis of a comparison result.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: November 21, 2017
    Assignee: SHINDENGEN ELECTRIC MANUFACTURING CO., LTD.
    Inventors: Tomohiro Tanabe, Kazuya Okabe, Daisuke Hagiwara
  • Patent number: 9758038
    Abstract: A clutch control device is provided for a four-wheel drive vehicle for transmitting drive force to the rear wheels. The clutch control device includes a dog clutch and a friction clutch, and a controller that controls the engagement and disengagement of the dog clutch and the friction clutch. In this clutch control device, the four-wheel drive hybrid vehicle includes a disconnected, two-wheel drive mode and a connected, four-wheel drive mode. When a driver's foot is lifted off an accelerator in a low-speed region when the connected, four-wheel drive mode is selected, the 4WD control unit maintains the connected, four-wheel drive mode while the brakes are not depressed, and shifts the mode to the disconnected, two-wheel drive mode when the brakes are depressed.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: September 12, 2017
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Katsuyoshi Ogawa, Atsuhiro Mori, Shunichi Mitsuishi, Makoto Morita, Tetsu Takaishi
  • Patent number: 9604529
    Abstract: A four wheel drive power transmission system may include: a front wheel drive unit configured to selectively transmit power of an engine and power of a first motor/generator to a front wheel differential apparatus; and a rear wheel drive unit configured to transmit power of a second motor/generator to a rear wheel reduction gear unit.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: March 28, 2017
    Assignee: Hyundai Motor Company
    Inventor: Kum Lim Choi
  • Patent number: 9574624
    Abstract: A hydraulic system for an automatic gearbox for a motor vehicle, includes a high-pressure circuit which includes a pressure accumulator, at least one clutch and actuators, and a low-pressure circuit for cooling the clutch, the high-pressure circuit and the low-pressure circuit each containing a hydraulic cooling pump and a hydraulic charging pump that can be driven by a shared electric motor; and a controller which, when it is detected that the pressure accumulator needs to be charged, controls the electric motor to run at a charging setpoint speed, and/or, when it is detected that cooling is needed or another need exists, controls the electric motor to run at a cooling setpoint speed or another setpoint speed. When the pressure accumulator does not need to be charged and there is no need for cooling and no other need, the controller reduces the setpoint speed to zero for a specified period. At the end of the period the controller controls the electric motor to run at least at the test speed.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: February 21, 2017
    Assignee: AUDI AG
    Inventor: Stefan Ammler
  • Patent number: 9533686
    Abstract: A method for controlling automatic restarting of a vehicle including an automatic transmission, when the driver releases a brake pedal or pushes an accelerator pedal, the method including: a first phase of cranking an engine during which engine torque starts to increase without being transmitted to wheels of the vehicle, followed by a second launching phase during which the engine torque is gradually transmitted to the wheels, wherein the engine torque is controlled at a torque set value to be transmitted to the wheels, satisfying a launching time objective.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: January 3, 2017
    Assignee: RENAULT s.a.s.
    Inventors: Amine Gourara, Vincent Duvivier, Frederic Roudeau
  • Patent number: 9303659
    Abstract: Disclosed is a method of controlling the flow rate of a hydraulic pump, which controls the discharge flow rate in proportion to a manipulated amount of a manipulation lever operated by a user even when the discharge pressure of the hydraulic pump is varied.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: April 5, 2016
    Assignee: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventor: Hung-Ju Shin
  • Patent number: 9227603
    Abstract: A traction control system in vehicle comprises a detector for detecting a monitored value which changes according to a degree of a drive wheel slip; a condition determiner for determining whether or not the monitored value meets a control start condition and whether or not the monitored value meets a control termination condition; and a controller for executing traction control to reduce a driving power of the drive wheel during a period of time from when the condition determiner determines that the monitored value meets the control start condition until the condition determiner determines that the monitored value meets the control termination condition; the condition determiner being configured to set at least the control start condition variably based on a slip determination factor which changes according to a vehicle state and such that the control start condition changes more greatly according to the vehicle state than the control termination condition.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: January 5, 2016
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventor: Yoshimoto Matsuda
  • Patent number: 9103426
    Abstract: A left-right drive force difference transient control computation value calculating section uses a map search, based on a change rate of a target yaw rate, to find a left-right rear wheel drive force difference transient control computation value, which is a basic target value for a turning response transiently requested by a driver. A left-right drive force difference transient control gain computing section sets a left-right drive force difference transient control gain to be smaller than 1 in a low vehicle speed region. A transient control computing section multiplies the left-right rear wheel drive force difference transient control computing value by the left-right drive force difference transient control gain to calculate a left-right rear wheel drive force difference transient control amount and contributes the same to a left-right wheel drive force distribution control.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: August 11, 2015
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Shinichi Suzuki
  • Patent number: 9086282
    Abstract: A straight-traveling/turning determination device includes a straight-traveling/turning determiner that determines whether a motorcycle is traveling straight or turning by comparison between a threshold and a rotary speed comparison value that is a value resulting from comparison between the rotary speed of a front wheel and the rotary speed of a rear wheel. The straight-traveling/turning determiner uses the rotary speed comparison value in the state in which the vehicle speed is equal to or lower than first predetermined speed and an absolute value of the vehicle acceleration is equal to or lower than predetermined acceleration and a turn signal is not being actuated as a straight-traveling rotary speed comparison value, and determines that the motorcycle is turning if a ratio or difference between the rotary speed comparison value and the straight-traveling rotary speed comparison value becomes larger than a threshold.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: July 21, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventor: Takashi Tetsuka
  • Patent number: 9061679
    Abstract: A control apparatus for a hybrid vehicle includes: engine starting means for starting an engine when a need for switching to a 4-wheel drive mode has been forecasted, the hybrid vehicle having a series HV drive mode in which the hybrid vehicle is run with a second electric motor, in the released state of a connecting/disconnecting device, while a first electric motor is operated with a drive force of said engine to generate an electric energy, the control apparatus further including, as said engine starting means, series HV drive controlling means for starting said engine and enlarging a series HV drive mode region for running the hybrid vehicle in said series HV drive mode, so as to cover a portion or an entirety of an original EV drive mode region for running the hybrid vehicle in said EV drive mode, when the need for switching to said 4-wheel drive mode has been forecasted.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: June 23, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomoyuki Maruyama, Norihiro Yamamura, Akiko Nishimine, Ryoki Il, Tomoaki Furukawa, Takeshi Kanayama, Tetsuo Hori, Koji Hayashi, Takeshi Miyagawa, Akihiro Sato
  • Patent number: 9037363
    Abstract: A method of operating a transmission system of an automotive vehicle, the transmission system including a mechanism of mechanically coupling first and second axles of the transmission system, a status of the coupling mechanism defining a number of transmission modes. The transmission system includes a button of pulse type controlling selection of a transmission mode and, after the vehicle has stalled, the transmission mode that is active following restarting of the vehicle is the mode that was active before the vehicle stalled.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: May 19, 2015
    Assignee: RENAULT s.a.s.
    Inventors: Pascal Febrer, Nicolas Romani, Philippe Saint Loup
  • Patent number: 9020723
    Abstract: A driving force distribution controller comprises: a control device determining the value of torque which must be transmitted to a rear wheel; and a driving force transmission device transmitting torque corresponding to the torque value determined by the control device to the rear wheel. The control device reduces a torque value calculated based on an opening degree of an accelerator and a rotational speed difference when the rotational speed of an engine is lower than a first threshold value but higher than a second threshold value.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: April 28, 2015
    Assignees: JTEKT Corporation, Mazda Motor Corporation
    Inventors: Ryohei Shigeta, Akiyoshi Kakita, Masaki Mita, Akira Kodama, Yasushi Yagi
  • Publication number: 20150112563
    Abstract: A driving force distribution apparatus includes a basic distribution ratio calculator, a servo controller, and an adjuster. The basic distribution ratio calculator is configured to calculate a basic distribution ratio between a front driving force for front wheels and a rear driving force for rear wheels based on loads exerted on the front and rear wheels of a vehicle. The servo controller is configured to correct the basic distribution ratio so as to increase or decrease the basic distribution ratio based on a deviation between a target value of a rotation difference between the front and rear wheels and a measured value of the rotation difference between the front and rear wheels. The adjuster is configured to perform adjustment so that the rear driving force calculated based on the basic distribution ratio corrected by the servo controller does not exceed a total driving force.
    Type: Application
    Filed: September 29, 2014
    Publication date: April 23, 2015
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Takayuki SEKI, Norihisa NIHANDA, Shoichi OHYAGI
  • Patent number: 9014937
    Abstract: A front wheel differential lock control system for a straddle-ride type four-wheeled vehicle is provided that can reliably switch a differential locking mechanism into a lock state in a low vehicle-speed state. In an engine provided with a manual transmission having forward five-speed and reverse gears, only in a low gear ratio state (1st through 3rd gears) is actuation of a diff-lock actuator permitted to switch a front wheel differential mechanism into a differential lock state. When a diff-lock operation is operated on the time of selection of third-, fourth- or fifth-speed gear, engine rotation number control is exercised to allow an engine rotation number to converge on a predetermined upper limit value. In an engine provided with a start clutch or a torque converter, actuation of the diff-lock actuator is permitted only in a low engine rotation number state where drive force is not transmitted to the front wheels.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: April 21, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Munehiro Kubozono, Tatsuya Shiokawa
  • Patent number: 9014938
    Abstract: A travel control apparatus for a four-wheel drive vehicle includes a throttle controller, a driving force distributor, a four-wheel drive controller, a vehicle stability assist controller, a requested target drive torque calculator, and an estimated drive torque calculator. In a case where a failure detector detects a failure and the four-wheel drive controller changes a drive control from a four-wheel drive control to a two-wheel drive control, the travel control apparatus sends a first throttle control signal to the throttle controller and changes the drive control from the four-wheel drive control to the two-wheel drive control when an estimated drive torque is greater than an requested target drive torque, and the travel control apparatus changes the drive control from the four-wheel drive control to the two-wheel drive control without sending the first throttle control signal when the estimated drive torque is not greater than the requested target drive torque.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: April 21, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Norihisa Nihanda, Takayuki Seki, Shoichi Ohyagi
  • Patent number: 9008903
    Abstract: The present disclosure presents a wheel diameter variation-detecting device capable of properly detecting relative variation in diameter between a plurality of wheels of a vehicle. The wheel diameter variation-detecting device can detect variation in diameter between a plurality of wheels of a vehicle, can detect rotational speeds of the respective wheels, and can calculate a variation parameter indicative of variation in diameter between the wheels using one of the wheels as a reference wheel, based on a result of comparison between the rotational speed of the reference wheel and that of one of the wheels other than the reference wheel. Further, the wheel diameter variation-detecting device can learn the variation parameter based on a value obtained by averaging a plurality of values of the variation parameter obtained before the detected travelled distance reaches a predetermined distance.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: April 14, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Takeshi Kurata, Takahiro Eguchi, Shuichi Fujimoto, Hirohiko Totsuka
  • Patent number: 9008915
    Abstract: A method for operating steerable rear wheels of a vehicle includes detecting a rear wheel steering angle of at least one of the steerable rear wheels, and detecting a first vehicular condition. The method further includes determining a weighted rear steering angle value based at least in part upon the rear wheel steering angle and the first vehicular condition, and controlling the steerable rear wheels in response to the weighted rear steering angle value.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: April 14, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Xiaodi Kang, Christopher J. Cymbal, David A. Thompson
  • Patent number: 9002578
    Abstract: A vehicle control system configured to judge a vehicle behavior or a driving preference of a driver based on acceleration of the vehicle including at least longitudinal acceleration. An acceleration value used in the judgment is obtained on the basis of a weighted detection value of the actual longitudinal acceleration of the vehicle, and a weighted parameter which is varied by an operation to increase a driving force of the vehicle executed by the driver. A weight on the parameter is reduced in case a weight on the detection value of the longitudinal acceleration is increased, and the weight on the parameter is increased in case the weight on the detection value of the longitudinal acceleration is reduced.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: April 7, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shin Noumura, Kaiji Itabashi, Toshio Tanahashi, Keisuke Takeuchi, Yoshimitsu Agata, Tomohide Kawasaki
  • Patent number: 9002602
    Abstract: A method of determining a current operating range of a transfer case includes continuously calculating current Combined Drive Ratio (CDR), and categorizing the current CDR into one of a pre-determined number of expected CDRs. Counters are used to track when the current CDR is identified as an expected CDR. The different counters are then analyzed using simple mathematical operations to identify which gear ratio the transfer case is currently operating in.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: April 7, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Peter John Giles, Michael A. Turley
  • Patent number: 9002609
    Abstract: A vehicle brake control system includes a regenerative braking control component, a frictional braking control component, a calculating component and a controlling component. The regenerative braking control component controls a regenerative braking device to provide a regenerative braking torque. The frictional braking control component controls a frictional braking device to provide a frictional braking torque. The calculating component calculates a regenerative braking torque filter processing value based on a fluctuation frequency of the regenerative braking torque. The controlling component, during a first condition, operates a motorized power assist control device based on the regenerative braking torque filter processing value, instead of the regenerative braking torque, to moderate the frictional braking torque, such that the regenerative braking torque and the moderated frictional braking torque provide a target braking torque based on a braking operation.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: April 7, 2015
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kensuke Nakamura, Noriaki Fujiki, Keigo Ajiro
  • Patent number: 8996267
    Abstract: A driving force control device for a four-wheel-drive vehicle performs, by controlling the driving force that is allocated to the rear wheels by a front and rear torque allocation clutch that is arranged between a propeller shaft and a rear diff, the control of setting front wheels as primary drive wheels and rear wheels as auxiliary drive wheels. A control is performed to disable the allocation of driving force to the rear wheels by disengaging the front and rear torque allocation clutch, when the state that the difference in wheel speed between the left and right rear wheels is equal to or more than 80 km continues for 0.1 sec or longer in the state that the vehicle body speed is equal to or less than 120 km.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: March 31, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yusuke Sakaguchi, Kouji Ono, Ryuichi Murakami
  • Patent number: 8989979
    Abstract: A four-wheel-drive vehicle includes a clutch that is able to allow and interrupt transmission of driving force to a propeller shaft, and a traction control unit that controls at least one of the driving force generated by an engine and braking force applied to right and left front wheels to suppress a slip of the right and left front wheels. When the drive mode is switched from a two-wheel-drive mode to a four-wheel-drive mode, if the relative rotational speed between a first rotary member and a second rotary member constituting a clutch is equal to or higher than a predetermined value, an ECU outputs a control command signal for suppressing the slip of the right and left front wheels to the traction control unit.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: March 24, 2015
    Assignee: JTEKT Corporation
    Inventors: Kenta Taniguchi, Akira Kodama, Tomoaki Kato, Masaki Mita
  • Patent number: 8989981
    Abstract: There is provided a vehicle drive control system that feels less unnatural and that enables an improvement in safety performance. A vehicle motion control system capable of independently controlling a driving force and a braking force of four wheels comprises: a first mode (G-Vectoring control) in which substantially the same driving force and braking force are generated with respect to left and right wheels among the four wheels based on a longitudinal acceleration/deceleration control command that is coordinated with the vehicle's lateral motion; and a second mode (sideslip prevention control) in which different driving forces and braking forces are generated with respect to the left and right wheels among the four wheels based on a target yaw moment derived from the vehicle's sideslip information, wherein the first mode is selected when the target yaw moment is equal to or less than a pre-defined threshold, and the second mode is selected when the target yaw moment is greater than the threshold.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: March 24, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Makoto Yamakado, Shinjiro Saito, Atsushi Yokoyama, Junya Takahashi, Tatsuya Yoshida