Restricting Differential Operation Patents (Class 701/88)
  • Patent number: 10315624
    Abstract: A device for controlling access to a vehicle, the device including: a housing, the housing including a transmitter, a receiver, a microcontroller and an unlocking mechanism, wherein the housing is configured to be mounted to a vehicle and, in response to a triggering event at the unlocking mechanism, the microcontroller is configured to advertise itself to allow a previously linked remote device to connect and, once a connection is established with the remote device, the transmitter is configured to send an unlock signal to an electronic control unit inside the vehicle to unlock a door of the vehicle.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: June 11, 2019
    Assignee: VOXX INTERNATIONAL CORP
    Inventors: Joseph Anthony Santavicca, Tristen Kyle Pierson, Benson James Brady, Kevin Tang
  • Patent number: 9296391
    Abstract: Vehicle state estimation methods include measuring torque, using the measured torque to formulate a vehicle state estimation for vehicle control and applying the vehicle state estimation to control the vehicle.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: March 29, 2016
    Assignee: Ford Global Technologies, LLC
    Inventors: Jianbo Lu, Hai Yu, Wei Liang
  • Patent number: 9108631
    Abstract: A hybrid vehicle and method of control include an internal combustion engine and at least one traction motor operated in an automatic mode such that the combined wheel torque is a function of accelerator pedal position and vehicle speed. In a select shift mode, wheel torque is also a function of a virtual gear number. The virtual gear number varies in response to driver activation of shift selectors or automatically in response to changes in vehicle speed. The vehicle transitions into select shift mode in response to driver activation of a downshift selector. When the transition occurs, an initial virtual gear number is selected to ensure that wheel torque increases.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: August 18, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Qing Wang, Ming Lang Kuang, Fazal Urrahman Syed, Ryan Abraham McGee, Jason Meyer
  • Patent number: 9079579
    Abstract: A control apparatus for a vehicle is provided with a plurality of actuators which perform sprung vibration suppression control, a vertical acceleration sensor configured to detect sprung vertical acceleration, and a plurality of actuator attitude control units which control the respective actuators such that the vertical acceleration detected by the vertical acceleration sensor becomes vertical acceleration corresponding to a target sprung state.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: July 14, 2015
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Hironobu Kikuchi, Katsuhiko Hirayama
  • Patent number: 9050906
    Abstract: An abnormal torque evaluation apparatus is applied to an electrically driven vehicle configured to drive left and right driving wheels independently with respective electric motors and also configured to independently drive the left and right driving wheels by means of the electric motors driven responsively to respective torque commands. Also provided are a yaw jerk detection means for detecting a yaw jerk and an abnormal torque evaluator for evaluating, based on the yaw jerk, the presence or absence of the occurrence of abnormal motor torque at the electric motors.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: June 9, 2015
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Kensuke Ito, Yasushi Tomita, Kazuto Koyama, Masato Kondou, Yuuki Nakajima, Ikuhiro Taniguchi
  • 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: 8983691
    Abstract: An electric lawn tractor roll away prevention system includes a brushless DC electric motor powering a traction drive wheel on the electric lawn tractor. The motor is connected to phase wires and provides a back EMF voltage on the phase wires if the electric lawn tractor rolls and turns the traction drive wheel without electric power from the motor. A three phase inverter rectifies the back EMF voltage, turns on the traction controller if the rectified voltage reaches a pre-specified threshold, and applies a voltage to the phase wires to reduce the speed of the electric lawn tractor by regenerative braking.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: March 17, 2015
    Assignee: Deere & Company
    Inventors: Roger K. Amundson, Jacob C. Kallara, Patrick W. Cross, Troy W. Harris, III
  • Publication number: 20150073674
    Abstract: A vehicle control strategy provides for automatically controlled movement from rest with deliberate wheel slip to maximize thrust. Different wheel slip conditions are provided for different terrain types. Wheel slip may be progressively reduced as the vehicle reaches a steady state speed. The strategy may also be implemented to maintain vehicle progress on low friction surfaces. The vehicle driver may be commanded to vary a control input, such as accelerator pedal position.
    Type: Application
    Filed: March 29, 2013
    Publication date: March 12, 2015
    Inventors: James Kelly, Andrew Fairgrieve
  • Publication number: 20150039201
    Abstract: A method of controlling a differential lock. The method may include determining a target point for disengaging the differential lock and disengaging the differential lock when the vehicle reaches the target point.
    Type: Application
    Filed: July 30, 2013
    Publication date: February 5, 2015
    Applicant: ArvinMeritor Technology, LLC
    Inventor: Simon Dean
  • Patent number: 8836256
    Abstract: A drive system has a switched reluctance motor (SR motor) and a control system configured to determine an estimated total torque of SR motor as a function of the phase voltages and phase currents of the phases of the SR motor.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: September 16, 2014
    Assignee: Deere & Company
    Inventors: Zimin W. Vilar, Chris J. Tremel
  • Patent number: 8744710
    Abstract: A control device for controlling a front wheel drive force and a rear wheel drive force of a vehicle that includes a transmission comprises: a first controller for controlling a drive force of a main drive wheel and a drive force of an auxiliary drive wheel, the drive force of the main drive wheel being one of the front-wheel drive force and the rear-wheel drive force, and the drive force of the auxiliary drive wheel being another of the front-wheel drive force and the rear-wheel drive force; and a second controller for detecting whether a speed-change ratio of the transmission has changed. In a case that the second controller has detected that the speed-change ratio has changed, the first controller increases the drive force of the auxiliary drive wheel and reduces the drive force of the main drive wheel.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: June 3, 2014
    Assignee: Nissin Kogyo Co., Ltd.
    Inventor: Manabu Hiroya
  • Patent number: 8731759
    Abstract: When two (in particular electric) drives operate on wheels decoupled from each other in a motor vehicle, the drives should have an identical construction and the same properties. However, if one drive is stronger than the other, distribution factors other than 0.5 must define the target torque for the two drives, i.e. the fraction of a total torque, in order to provide a correction. The distribution factors are determined while the motor vehicle is in operation. For this purpose, a steering angle and an additional quantity such as the lateral acceleration or the yaw rate are determined and a check is performed to determine if the additional quantity has the correct functional dependency on the steering angle.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: May 20, 2014
    Assignee: Audi AG
    Inventors: Michael Wein, Tim Meissner
  • Patent number: 8725381
    Abstract: The procedure of slip detection computes a right wheel speed Vr from a rotation speed Nm2 of a motor MG2 determined according to a detection result of a rotational position detection sensor 44 and from a left wheel speed Vl measured by a wheel speed sensor 64b attached to a left wheel 62b. A right wheel acceleration ar is calculated from the computed right wheel speed Vr. When the calculated right wheel acceleration ar exceeds a preset reference value arslip, the procedure detects the occurrence of a slip of a right wheel 62a. When a left wheel acceleration al calculated from the obtained left wheel speed Vl exceeds a preset reference value alslip, the procedure detects the occurrence of a slip of the left wheel 62b.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: May 13, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Eiji Maeda
  • Patent number: 8649952
    Abstract: A method for controlling a backing vehicle includes if a back-up sensor indicates that an obstacle is present behind the vehicle and a gear selector is moved to a reverse position, delaying reverse gear engagement and producing a warning signal, and producing a transmission tie-up if brakes are applied insufficiently to stop the vehicle.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: February 11, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Felix Nedorezov, Hong Jiang, Steven G. Thomas
  • Patent number: 8635002
    Abstract: A method of controlling at least one coupling in a powertrain of a motor vehicle includes the steps of: determining at least one slip value which represents an instantaneous slip between different axles of the motor vehicle or between different wheels of an axle; forming an absolute value of the slip value which corresponds to the amount of the slip value; summing the absolute value or a substitute value derived therefrom to a last-formed slip sum value to form an instantaneous slip sum value; comparing the instantaneous slip sum value with a slip sum threshold value: and generating a control signal for actuating the coupling if the instantaneous slip sum value reaches or exceeds the slip sum threshold value.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: January 21, 2014
    Assignee: Engineering Center Steyr GmbH & Co KG
    Inventors: Christoph Brenner, Gerhard Frühwirth
  • Patent number: 8428841
    Abstract: A vehicle motion control device is provided. The vehicle motion control device includes a steering angle deviation calculating unit which calculates a steering angle deviation of the vehicle, a frictional coefficient calculating unit which calculates each of road surface frictional coefficients for a traveling road surface of four wheels; and a pressure increasing and reducing controlling unit which performs a split control including applying a pressure increasing limitation of a pressure increasing control in an anti-skid control to a front wheel at a side of the traveling road surface having higher road surface frictional coefficient between the right and left wheels based on an absolute value of the steering angle deviation such that a pressure increasing gradient in the pressure increasing control is smaller as the absolute value is larger.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: April 23, 2013
    Assignee: Advics Co., Ltd.
    Inventors: Ken Kudo, Masato Terasaka, Takuo Kitano
  • Patent number: 8423258
    Abstract: Systems and methods for detecting wheel-spinning situations of a vehicle. One system includes a controller. The controller is configured to determine a speed of each wheel of the vehicle based on information received from a plurality of wheel speed sensors, to identify a second slowest wheel of the vehicle based on the speed of each wheel, to calculate a vehicle acceleration torque based on an acceleration of the second slowest wheel of the vehicle and a mass of the vehicle, to calculate a torque ratio based on the vehicle acceleration torque and a wheel drive torque, and to activate a traction control system when the torque ratio is greater than a predetermined threshold.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: April 16, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Rick Robinson, Qingyuan Li, Hsien-cheng Wu
  • Patent number: 8401748
    Abstract: In a method for influencing the traction force during shifting operations of a manual transmission in vehicles having at least two drive axles, the drive system of the first axle is activated in such a way that the interruptions in traction force occurring at the second axle during shifting operations of the manual transmission are at least partially compensated for.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: March 19, 2013
    Assignee: Robert Bosch GmbH
    Inventor: Thomas Huber
  • Patent number: 8352145
    Abstract: A traction control device includes: rotation speed detectors provided to wheels; a control-start determiner that determines whether or not to control a braking mechanism and a differential adjusting mechanism based on rotation speeds; a braking mechanism controller that controls the braking mechanism based on a result of the determination of the control-start determiner; and a differential adjusting mechanism controller that controls the differential adjusting mechanism based on the result of the determination of the control-start determiner, in which the control-start determiner includes: a right-left-wheel rotation speed difference calculating section; a front-rear-wheel rotation speed difference calculating section; and a control-start determining section that determines whether or not to start controlling at least one of the braking mechanism and the differential adjusting mechanism when one of rotation speed differences reaches or exceeds a predetermined threshold.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: January 8, 2013
    Assignee: Komatsu Ltd.
    Inventors: Koji Uematsu, Kazuhiro Hatake, Yuya Kusumoto
  • Patent number: 8301353
    Abstract: A vehicle motion control device and method computes a size of a using friction circle in each of wheels by multiplying a size of an each wheel friction circle indicating a maximum generating force in each of the wheel tires by a previously computed each wheel using percentage, computes the each wheel tire generating force and the each wheel using percentage indicating a rate with respect to an upper limit value of a ?-using efficiency in each of the wheels, and controls a vehicle motion in such a manner that the computed each wheel tire generating force is obtained on the basis of the computed each wheel tire generating force, thereby minimizing an upper limit of the ?-using efficiency in each of the wheels.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: October 30, 2012
    Assignees: Kabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki Kaisha, JTEKT Corporation
    Inventors: Eiichi Ono, Yoshikazu Hattori
  • Publication number: 20120253627
    Abstract: Systems and methods for detecting wheel-spinning situations of a vehicle. One system includes a controller. The controller is configured to determine a speed of each wheel of the vehicle based on information received from a plurality of wheel speed sensors, to identify a second slowest wheel of the vehicle based on the speed of each wheel, to calculate a vehicle acceleration torque based on an acceleration of the second slowest wheel of the vehicle and a mass of the vehicle, to calculate a torque ratio based on the vehicle acceleration torque and a wheel drive torque, and to activate a traction control system when the torque ratio is greater than a predetermined threshold.
    Type: Application
    Filed: March 29, 2012
    Publication date: October 4, 2012
    Applicant: ROBERT BOSCH GMBH
    Inventors: Rick Robinson, Qingyuan Li, Hsien-cheng Wu
  • Patent number: 8265845
    Abstract: A right-left driving force control system includes: a selecting unit which: selects an adjusting unit adjusting distribution of a driving force between right and left wheels, when a shifting direction in which the driving force is shifted between the wheels and which is related to a control amount is the same as a first direction towards one of the wheels which has a larger speed; selects a limiting unit adjusting a differential action limiting force, when the shifting direction is the same as a second direction towards one of the wheels which has a smaller speed, and a difference between the wheel speeds is equal to or larger than a threshold value; and maintains the adjusting unit or the limiting unit, which has been selected, when the shifting direction is the same as the second direction, and the difference between the wheel speeds is less than the threshold value; and a control unit which controls the adjusting unit or the limiting unit, which is selected or maintained by the selecting unit, based on the
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: September 11, 2012
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Takuya Yamamura, Yuichi Ushiroda, Kaoru Sawase
  • Publication number: 20120221221
    Abstract: A method of controlling at least one coupling in a powertrain of a motor vehicle includes the steps of: determining at least one slip value which represents an instantaneous slip between different axles of the motor vehicle or between different wheels of an axle; forming an absolute value of the slip value which corresponds to the amount of the slip value; summing the absolute value or a substitute value derived therefrom to a last-formed slip sum value to form an instantaneous slip sum value; comparing the instantaneous slip sum value with a slip sum threshold value: and generating a control signal for actuating the coupling if the instantaneous slip sum value reaches or exceeds the slip sum threshold value.
    Type: Application
    Filed: February 27, 2012
    Publication date: August 30, 2012
    Applicant: ENGINEERING CENTER STEYR GMBH & CO KG
    Inventors: Christoph Brenner, Gerhard Fruhwirth
  • Patent number: 8214099
    Abstract: The invention relates to a method and a device for monitoring the operating conditions of motor vehicles, with a drive system with at least one differential that distributes drive torque to the driven wheels. To avoid unacceptable wear in the differential of the drive system, it is proposed that at least the output speeds of the differential, and, via a steering angle sensor, an at least approximate driving of the motor vehicle in a straight line are detected and are compared over a time interval, and that in the case where the differential speed of the output shafts is above a defined speed threshold and prevails over the time interval and the vehicle is driven in a straight line, a warning signal is generated.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: July 3, 2012
    Assignee: Audi AG
    Inventor: Torsten Scheffel
  • Patent number: 8204669
    Abstract: The present device relates to a method for regulating the driving dynamics of a vehicle, in which at least one wheel of the vehicle is acted upon by a torque on the basis of control of a clutch transmitting a torque to the wheel and/or on the basis of control of a differential distributing torque to the wheel and at least to one other wheel. The method is characterized in that a value of the torque is determined as a function of a first and a second value of a yaw moment.
    Type: Grant
    Filed: May 4, 2004
    Date of Patent: June 19, 2012
    Assignee: Continental Teves AG & Co. OHG
    Inventors: Ulrich Lüders, Rainer Oehler, Thomas Raste, Hubertus Raitz von Frentz
  • Patent number: 8050829
    Abstract: An electronic locking mechanism for a vehicle differential assembly includes a lock element movable in response to an actuation signal between an open position and a locked position. The lock element generally forces side gears of the differential assembly to turn generally at a same rate when the lock element is in the locked position. The electronic locking mechanism further includes a processor configured to determine a status of the differential assembly from a current profile that includes the actuation signal and an induced current. The determined differential assembly status is generally one of an “activated and locked” status, an “activated but unlocked” status, a “deactivated but locked” status, and a “deactivated and unlocked” status.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: November 1, 2011
    Assignee: GKN Driveline North America, Inc.
    Inventors: Rory Matthew Johnson, Christopher C. Murray
  • Publication number: 20110257861
    Abstract: A traction control device includes: rotation speed detectors provided to wheels; a control-start determiner that determines whether or not to control a braking mechanism and a differential adjusting mechanism based on rotation speeds; a braking mechanism controller that controls the braking mechanism based on a result of the determination of the control-start determiner; and a differential adjusting mechanism controller that controls the differential adjusting mechanism based on the result of the determination of the control-start determiner, in which the control-start determiner includes: a right-left-wheel rotation speed difference calculating section; a front-rear-wheel rotation speed difference calculating section; and a control-start determining section that determines whether or not to start controlling at least one of the braking mechanism and the differential adjusting mechanism when one of rotation speed differences reaches or exceeds a predetermined threshold.
    Type: Application
    Filed: July 1, 2011
    Publication date: October 20, 2011
    Applicant: KOMATSU LTD.
    Inventors: Koji Uematsu, Kazuhiro Hatake, Yuya Kusumoto
  • Patent number: 7945367
    Abstract: A travel device includes an attitude detector that detects attitude information of a main body, a vehicle velocity detector that detects a vehicle velocity, a pseudo-attitude command generator that generates a pseudo-attitude information command of the main body based on the detected attitude information, the detected vehicle velocity, an input attitude information command and an input vehicle velocity command when accelerating or decelerating a vehicle, and an attitude controller that performs attitude control in such a way that the attitude information detected by the attitude detector follows the pseudo-attitude information command of the main body generated by the pseudo-attitude command generator.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: May 17, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Yusuke Kosaka
  • Publication number: 20110082634
    Abstract: A method for controlling a locking differential of a motor vehicle includes locking the differential, if vehicle speed is less than a reference speed, and a wheel speed differential due to wheel slip is greater than a reference speed; and unlocking the differential and preventing its engagement, if vehicle speed is greater than the reference speed, and said wheel speed differential is less than a reference speed.
    Type: Application
    Filed: October 1, 2009
    Publication date: April 7, 2011
    Inventors: Jacob M. Povirk, Brian J. Andonian, Joseph J. Torres, Kenneth G. Walega
  • Patent number: 7890240
    Abstract: A brake system fault pedal gain change method and system for brake pedal simulator equipped vehicles such as hybrid electric vehicles is provided. In the event of a brake system booster fault, the method alerts the driver by way of tactile feedback. Additionally, the disclosed method provides a controlled means to gradually increase required brake pedal force during a brake system fault to avoid an abrupt change in brake pedal force when the brake system boost is depleted.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: February 15, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Timothy M. Karnjate, William K. Manosh
  • Patent number: 7801657
    Abstract: A control system for a vehicle having first and second wheels is provided that includes a differential apparatus adapted to distribute torque between the first and second wheels and a traction controller for controlling operation of the differential apparatus from vehicle launch up to a predetermined vehicle speed. The traction controller is configured to engage the differential apparatus in a first operating state according to at least one vehicle operating parameter indicative of a low traction operating condition and to further control engagement of the differential apparatus in a second vehicle operating state during the low traction operating condition according to a difference between an actual vehicle yaw rate and a predetermined target vehicle yaw rate. The control system also includes a stability controller for controlling engagement of the differential apparatus at or above the predetermined vehicle speed.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: September 21, 2010
    Assignee: Eaton Corporation
    Inventors: Damrongrit Piyabongkarn, Jae Y. Lew, John A. Grogg, Robert J. Kyle
  • Patent number: 7680571
    Abstract: A differential score protection system that regulates an engine to inhibit damage to a differential driven by the engine includes a first module that initiates a differential score protection mode and a second module that decreases an engine speed when the engine speed exceeds an engine speed limit. The engine speed limit is one of a plurality of pre-determined values based on a design slip speed limit of the differential.
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: March 16, 2010
    Assignee: GM global Technology Operations, Inc.
    Inventors: Haytham A. Fayyad, Min K. Kim
  • Patent number: 7613559
    Abstract: A method for automatically actuating longitudinal blocks in four-wheel vehicles, particularly in working machines and service vehicles. The longitudinal blocks are always open when driving situations occur in which the blocking effect is absolutely unnecessary. The longitudinal blocks are closed in all other situations.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: November 3, 2009
    Assignee: ZF Friedrichshafen AG
    Inventors: Hugo Burkhart, Bernd Aumann
  • Patent number: 7562947
    Abstract: An apparatus for controlling the driving force of a vehicle is capable of using brakes to limit a differential operation, securing sufficient torque, and suppressing the heating and wearing of the brakes. In the vehicle, an engine generates torque to drive front wheels and/or rear wheels. A front differential allows differential rotation between the front wheels and transmits torque of the engine to the front wheels. A rear differential allows differential rotation between the rear wheels and transmits torque of the engine to the rear wheels. Disk brakes separately brake the front and rear wheels. An ABS/attitude electric control unit controls the disk brakes to limit differential rotation between the front wheels or between the rear wheels. At least one of the front and rear differentials is provided with a differential limiting mechanism.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: July 21, 2009
    Assignee: GKN Driveline Torque Technology KK
    Inventors: Kunio Katada, Masatoshi Noguchi, Masao Teraoka
  • Publication number: 20090159359
    Abstract: An independently suspended, driven axle shaft set in which the axle shafts are asymmetric with respect to each other, wherein the asymmetry provides mitigation of powerhop. The asymmetric axle shafts are asymmetrically selected such that the relative torsional stiffness therebetween is different by a ratio substantially between about 1.4 to 1 and about 2.0 to 1. The asymmetry may be provided by any known modality that alters torsional stiffness and is compliant with operational load demands of the axle shafts, as for example the axle shafts having the same length, but differing cross-sectional diameters; or by the axle shafts having the same cross-sectional diameters, but differing lengths; or a combination thereof.
    Type: Application
    Filed: June 27, 2008
    Publication date: June 25, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: David W. Mikels, Young-Jin Seo
  • Patent number: 7509199
    Abstract: A global positioning system (GPS) based navigation and steering control system for ground vehicles, in particular, agricultural ground vehicles such as tractors, combines, sprayers, seeders, or the like, calculates instantaneous placement corrections to achieve desired towed implement placement on curved paths, and a method for same.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: March 24, 2009
    Assignee: Deere & Company
    Inventor: Andrew Karl Wilhelm Rekow
  • Publication number: 20090063002
    Abstract: A vehicle motion control device and method computes a size of a using friction circle in each of wheels by multiplying a size of an each wheel friction circle indicating a maximum generating force in each of the wheel tires by a previously computed each wheel using percentage, computes the each wheel tire generating force and the each wheel using percentage indicating a rate with respect to an upper limit value of a ?-using efficiency in each of the wheels, on the basis of a target vehicle body force and moment indicating a target vehicle body longitudinal force, a target vehicle body transverse force and a target yaw moment, and the computed size of the using friction circle, and controls a vehicle motion in such a manner that the computed each wheel tire generating force is obtained on the basis of the computed each wheel tire generating force, thereby minimizing an upper limit of the ?-using efficiency in each of the wheels.
    Type: Application
    Filed: March 29, 2007
    Publication date: March 5, 2009
    Applicants: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATION
    Inventors: Eiichi Ono, Yoshikazu Hattori
  • Patent number: 7487028
    Abstract: A power distribution control device 42 calculates a low-? information magnitude, associated with the friction coefficient of the road surface, based on the slip rate and the vehicle acceleration operation magnitude. If the low-? information magnitude exceeds an addition evaluation threshold, the power distribution control device 42 adds the low-? information magnitude. If the low-? information magnitude does not exceed the addition evaluation threshold, the power distribution control device 42 subtracts a constant K from a counter. The power distribution control device 42 makes evaluates a road to have a low-? when the counter exceeds a low-? evaluation threshold.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: February 3, 2009
    Assignee: JTEKT Corporation
    Inventors: Ryouhei Shigeta, Tsuyoshi Murakami
  • Publication number: 20090005947
    Abstract: The procedure of slip detection computes a right wheel speed Vr from a rotation speed Nm2 of a motor MG2 determined according to a detection result of a rotational position detection sensor 44 and from a left wheel speed Vl measured by a wheel speed sensor 64b attached to a left wheel 62b. A right wheel acceleration ar is calculated from the computed right wheel speed Vr. When the calculated right wheel acceleration ar exceeds a preset reference value arslip, the procedure detects the occurrence of a slip of a right wheel 62a. When a left wheel acceleration al calculated from the obtained left wheel speed Vl exceeds a preset reference value alslip, the procedure detects the occurrence of a slip of the left wheel 62b.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 1, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Eiji Maeda
  • Patent number: 7455142
    Abstract: The present invention provides a method for improving cornering performance. From a given vehicle speed and lateral acceleration, in instances of a decrease in drive torque, individual wheel torque is shifted from inside wheels to outside wheels to increase vehicle yaw forces and counteract the understeer phenomenon. Similarly, in instances of increasing drive torque, individual wheel torque is shifted from outside wheels to inside wheels on a common axle to reduce vehicle yaw forces and counteract the oversteer phenomenon. Actual implementation of side-to-side torque shifting is done using a correction factor multiplied by other factors within a general torque shift equation.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: November 25, 2008
    Assignee: Honda Motor Co., Ltd.
    Inventor: James W. Post, II
  • Patent number: 7444222
    Abstract: Methods and apparatus are provided for generating a slip control for an active driveline device (such as an electronic limited slip differential (eLSD)) that corrects for longitudinal tire slip in the turning wheels of a vehicle. Indicia of a yaw rate of the vehicle are obtained by the eLSD, which then determining a target velocity difference for the turning wheels based at least in upon the yaw rate, along with other factors such as difference in wheel rotation speed or the wheel-road angle of the vehicle. Using these measured parameters, a slip control signal can be applied to the eLSD as a function of the determined target velocity difference.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: October 28, 2008
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Matthew G. Villella, Edmund F. Gaffney
  • Publication number: 20080255735
    Abstract: A method of operating a machine having a lockable differential includes monitoring a first operating parameter indicative of wheel slip, and monitoring a second operating parameter different from the first parameter, the method further including controlling locking and unlocking of the differential responsive to the second operating parameter. A machine is provided having an electronic controller including software control logic for controlling locking and unlocking of a differential, the electronic controller being configured to lock the differential where the machine is in an operating mode where wheel slip is likely, such as a digging/dozing mode. Satisfaction of criteria for locking may be recognition by the controller of a predetermined pattern of sensor inputs corresponding with a likely wheel slip condition, or actual slip detection.
    Type: Application
    Filed: April 11, 2007
    Publication date: October 16, 2008
    Inventors: Sameer S. Marathe, Scott A. Marks, Bradford J. Holt
  • Publication number: 20080221771
    Abstract: A method for controlling the rotational speed of at least one rotating element in a vehicle's drive line is provided. A first control model and a second control model are defined. The first control model calculates a permitted slippage of at least one of the vehicle's ground-engaging elements at its point of contact with the ground, which ground-engaging element is driven via the rotating element. The second control model calculates a torque delivered to the said ground-engaging element. The result of one of the said control models is utilized for controlling the rotational speed of the rotating element.
    Type: Application
    Filed: September 20, 2005
    Publication date: September 11, 2008
    Applicant: VOLVO CONSTRUCTION EQUIPMENT HOLDING SWEDEN AB
    Inventor: Karl Erik Olsson
  • Publication number: 20080201051
    Abstract: A driving force control device includes an individual-wheel friction-circle limit-value calculating portion that calculates friction-circle limit-values of individual wheels, an individual-wheel requested-resultant-tire-force calculating portion that calculates requested resultant tire forces of the individual wheels, an individual-wheel resultant-tire-force calculating portion that calculates resultant tire forces of the individual wheels, an individual-wheel requested-excessive-tire-force calculating portion that calculates requested excessive tire forces of the individual wheels, an individual-wheel excessive-tire-force calculating portion that calculates excessive tire forces of the individual wheels, an excessive-tire-force calculating portion that calculates an excessive tire force, an over-torque calculating portion that calculates an over-torque, and a control-amount calculating portion that calculates a control amount that is output to an engine control unit.
    Type: Application
    Filed: January 24, 2008
    Publication date: August 21, 2008
    Inventors: Takeshi Yoneda, Keisuke Hosokawa, Koichi Inoue, Hirowatari Yosuke, Tomohiro Yamada, Koji Matsuno, Masaru Kogure, Satoru Akiyama, Masato Igarashi, Yosuke Morokuma
  • Publication number: 20080194371
    Abstract: A rotation speed of a transmitting member is controlled such that a predetermined rotation speed difference or predetermined rotation speed ratio is obtained between the rotation speed of the transmitting member and an eighth rotating element or a fourth rotating element. By detecting a change in the rotation speed of a second motor that is connected to the transmitting member when an apply device is applied, it is possible to determine the time at which a first clutch or a second clutch starts to be applied and the time at which the first clutch or the second clutch is completely applied. As a result, it is possible to control the apply pressure of the first clutch or the second clutch and thus rapidly execute a shift.
    Type: Application
    Filed: February 12, 2008
    Publication date: August 14, 2008
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tooru Matsubara, Hiroyuki Shibata, Atsushi Tabata, Masakazu Kaifuku
  • Patent number: 7315773
    Abstract: This invention provides a vehicle motion control method and a vehicle motion control apparatus capable of improving the behavior stability of a vehicle. According to the vehicle motion control method, vehicle steering characteristic is determined based on a behavior amount differentiated value obtained by differentiating (S203) a slip angle differential value which is a behavior amount of the vehicle which occurs around a z-axis in the vertical direction with respect to the vehicle body (S205, S209). Consequently, because the phase of the slip angle differential value is progressed, the transition tendency of the steering characteristic, that is, which the vehicle motion condition is moved to over-steer or under-steer, can be obtained early. Therefore, the starting timing of the steering control or drive power control of the vehicle can be accelerated thereby improving the behavior stability of the vehicle.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: January 1, 2008
    Assignee: JTEKT Corporation
    Inventors: Hiroaki Kato, Minekazu Momiyama, Takayuki Ohta
  • Patent number: 7276014
    Abstract: A vehicle stability control system includes a controller configured to deactivate a traction control clutch, provide a reverse torque across the traction control clutch, and apply a braking torque according to a vehicle stability control strategy. The reverse torque across the traction control clutch may be provided by reducing an engine torque output, applying a pulse of brake pressure, or other means.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: October 2, 2007
    Assignee: NTN Corporation
    Inventors: Shiro Goto, Russell Monahan
  • Patent number: 7276015
    Abstract: Method and device for providing, in an engine-driven goods vehicle, at least two driving wheels (9, 10, 51, 52) and at least one differential (5, 6, 45, 46, 47) arranged between the driving wheels (9, 10, 51, 52). The device includes an engine control unit (3), at least one differential lock (7, 8, 48, 49, 50) for locking or braking the differential (5, 6, 45, 46, 47), the differential lock (7, 8, 48, 49, 50) being arranged between the driving wheels (9, 10, 51, 52). An operating element (4, 44) for activating each of the differential locks (7, 8, 48, 49, 50). The engine control unit (3) being configured to read-off the position of the operating element (4, 44) and to limit positive or negative output torques of the engine (1) when activating at least one of the differential locks (7, 8, 48, 49, 50) and as a function of the transmission ratio prevailing in the transmission (2, 42).
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: October 2, 2007
    Assignee: Volvo Lastvagnar AB
    Inventor: Hans Stervik
  • Patent number: 7031819
    Abstract: A plurality of vehicle stabilizing devices which operate according to different strategies and which actuate, independently of the driver, brake actuators which are assigned to the vehicle wheels, in order to stabilize the vehicle are arranged in the vehicle. The vehicle is equipped with at least one switchable differential lock in the drive train. The differential lock assumes a non-switched operating state, a first operating state in which the differential lock is preselected, and a second operating state in which the differential lock is switched. When the differential lock assumes the first operating state, some of the vehicle stabilizing devices, other than that vehicle stabilizing device which, by actuating the brake actuators independently of the driver, prevents the vehicle wheels from locking during a braking operation, are influenced in terms of their operating mode.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: April 18, 2006
    Assignee: DaimlerChrysler AG
    Inventors: Albert Hack, Franz Himler, Gerd Linzmayer
  • Patent number: 7016776
    Abstract: A control for a differential including magnetic powder torque transfer clutch for controlling slip across the differential mechanism. The clutch includes a first element driveably connected to a first control shaft, a second element driveably connected to the second output shaft, chamber bounded by the first and second elements, magnetic powder located in the chamber; and an elecromagnetic coil producing a magnetic field of variable strength passing through the chamber and magnetic powder and changing a capacity of the clutch to transmit torque between the first and second control shafts as the field strength changes.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: March 21, 2006
    Assignee: Ford Global Technologies, LLC
    Inventors: Larry Elie, John Ginder, Clay Maranville