Four Wheel Drive Vehicle Patents (Class 701/89)
  • Patent number: 10399559
    Abstract: A system and method of controlling engine clutch engagement during TCS operation of a hybrid vehicle are provided. The method includes determining whether a TCS is operating and upon determining that the TCS is operating, determining a compensation value for early engagement of an engine clutch during the TCS operation based on a difference between a front wheel speed and a rear wheel speed and a slip amount of front wheels. Additionally, the method includes determining whether engagement of the engine clutch is capable of being started based on the compensation value and starting the engine clutch engagement. Since the engagement of the engine clutch is controlled based on the speed of non-drive wheels during TCS operation, the engagement stability of the engine clutch is improved and the amount of time required to engage the engine clutch is decreased.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: September 3, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Teh Hwan Cho, Sang Joon Kim, Gwang Il Du, Ji Hoon Kang, Seong Ik Park
  • Patent number: 10202039
    Abstract: A control device for controlling an engine based on a vehicle operating state is provided, which includes a steering angle detector for detecting a vehicle steering angle, and a processor configured to execute a basic target torque determining module for determining a basic target torque based on a vehicle operating state, a slip controller for acquiring the steering angle from the steering angle detector, detecting a slip state of wheels based on part of the vehicle operating state, and determining a torque control amount based on the slip state, a torque reduction amount determining module for acquiring the steering angle and determining a torque reduction amount based thereon, a final target torque determining module for determining a final target torque based on the basic target torque, the torque reduction amount, and the torque control amount, and an engine controlling module for controlling the engine to output the final target torque.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: February 12, 2019
    Assignee: Mazda Motor Corporation
    Inventors: Kenko Ujihara, Hiroaki Shiiba, Toshiya Kan
  • Patent number: 10189356
    Abstract: A vehicle control device includes: a slip determination module that determines a slip of each of wheels; a base distribution calculation module that calculates a base distribution torque to be distributed to the front and rear wheels on the basis of requested torques and a base distribution ratio of torques between the front and rear wheels, and changes the base distribution ratio on the basis of a result of slip determination performed by the slip determination module when the slip is detected; a rotation speed control module that decreases the base distribution torque on the basis of the result of slip determination, in a manner that a rotation speed of a slipping wheel that is slipping becomes equal to a target rotation speed; and a torque vectoring module that redistributes a torque down amount of the slipping wheel to the base distribution torque of non-slipping wheels that are not slipping.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: January 29, 2019
    Assignee: SUBARU CORPORATION
    Inventors: Hiroshi Ienaga, Takeshi Yoneda
  • Patent number: 9266467
    Abstract: A stop lamp lighting control device for an electric vehicle having an electric regenerative braking system includes a calculation unit that converts a first deceleration threshold value for turning on a stop lamp or a second deceleration threshold value for turning off the stop lamp to a first regenerative torque threshold value for turning-on the stop lamp or a second regenerative torque threshold value for turning-off the stop lamp by calculation assumed that a weight of the vehicle is a curb weight or a gross vehicle weight, and a determination unit that performs a comparison between a regenerative torque value generated by the electric regenerative braking system and the first regenerative torque threshold value or the second regenerative torque threshold value and controls the stop lamp to be turned on or turned off based on the comparison result.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: February 23, 2016
    Assignee: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
    Inventors: Toshifumi Mizui, Toshiyuki Matsumi, Hiroaki Miyamoto, Hideaki Taniguchi, Takanori Sugimoto, Yasuyuki Hatsuda, Akira Hashizaka, Masato Nishida, Sosuke Nanbu
  • Patent number: 9266528
    Abstract: The present invention relates to a control system for a vehicle (100), the system comprising: control means operable to monitor an accelerator control signal of the vehicle and to control a powertrain of the vehicle to apply an amount of torque to one or more wheels (111, 112,114, 115) of the vehicle (100) corresponding to the accelerator control signal, the powertrain comprising prime mover means (121, 123); and means for determining whether the measured rate of acceleration of the vehicle and the accelerator control signal have an expected correspondence, wherein if the measured rate of acceleration and the accelerator control signal do not have the expected correspondence, the control means is operable to command a change in the amount of torque applied to the one or more wheels by the powertrain.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: February 23, 2016
    Assignee: JAGUAR LAND ROVER LIMITED
    Inventor: Andrew Raftry
  • Patent number: 9266466
    Abstract: A stop lamp lighting control device for an electric vehicle having an electric regenerative braking system, includes, a first calculation unit that converts a first deceleration threshold value to a first regenerative torque threshold value with a curb weight, a second calculation unit that converting a second deceleration threshold value to a second regenerative torque threshold value with a gross vehicle weight, a third calculation unit that calculates a third regenerative torque threshold value, and a determination unit that controls the stop lamp to be turned on when a regenerative torque value exceeds the first regenerative torque threshold value, the stop lamp to be turned off when the regenerative torque value is equal to or smaller than the second regenerative torque threshold value, and the stop lamp to be turned off when a given state continues.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: February 23, 2016
    Assignee: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
    Inventors: Toshifumi Mizui, Toshiyuki Matsumi, Hiroaki Miyamoto, Hideaki Taniguchi, Takanori Sugimoto, Yasuyuki Hatsuda, Akira Hashizaka, Masato Nishida, Sosuke Nanbu
  • Patent number: 9043116
    Abstract: The present invention relates to methods and apparatuses for performing driving assistance for a controlled vehicle, involving determining a first longitudinal acceleration target value on the basis of a lateral acceleration of the controlled vehicle, determining a second longitudinal acceleration target value on the basis of a target speed of the controlled vehicle, determining a third longitudinal acceleration target value based on a minimum value of the first longitudinal acceleration target value and the second longitudinal acceleration target value, and controlling a longitudinal acceleration of the controlled vehicle on the basis of the determined third longitudinal acceleration target value.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: May 26, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Junya Takahashi, Heiko Altmannshofer, Makoto Yamakado, Takao Kojima
  • Patent number: 9031728
    Abstract: An electric driving type utility vehicle having a regenerative brake force distribution control function, and a regenerative brake force distribution control method thereof are provided. The utility vehicle includes: a controller for controlling an output and a recovery of a motor; recovery sensing means for sensing a recovery braking state when the motor is driven; a power measurement unit for measuring the amount of recovery power generated in the recovery braking state; and a power switching unit for automatically switching a drive mode from a two-wheel drive mode to a four-wheel drive mode or vice versa according to the load condition. The present invention can switch the present mode to the four-wheel drive mode by operating the power switching unit according to the control of the controller when sensing the recovery brake through the recovery sensing means in the driving state.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: May 12, 2015
    Assignee: Daedong Industrial Co., Ltd.
    Inventor: Sung Do Im
  • Patent number: 9026326
    Abstract: When a vehicle speed is equal to or higher than a first vehicle speed threshold value or an uphill gradient is lower than a first gradient threshold value and uphill start control is cancelled, if a state where the vehicle speed is lower than a second vehicle speed threshold value and the uphill gradient is equal to or higher than a second gradient threshold value continues for a first set time, uphill start control is executed. When the vehicle speed is decreased after being once increased within a range where the vehicle speed is lower than the first vehicle speed threshold value and uphill start control is cancelled, if a state where the vehicle speed is lower than the second vehicle speed threshold value and the uphill gradient is equal to or higher than the second gradient threshold value continues for a second set time, the uphill start control is executed.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: May 5, 2015
    Assignee: JTEKT Corporation
    Inventors: Tomohiro Nozu, Ryohei Shigeta
  • 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
  • Publication number: 20150105992
    Abstract: A vehicle traction system includes a first traction wheel forming part of a first propulsion system including a mechanical drive train, a second traction wheel forming part of a second propulsion system including a hydraulic pump for powering a hydraulic motor, one sensor indicating a take-off condition, and a control unit for controlling the second propulsion unit. The control unit is programmed to automatically detect a take-off condition by the sensor and send an input to the control unit that a take-off condition is fulfilled, automatically provide a traction force from the second propulsion system in response to the indication that there is a take-off condition of the vehicle present and an indication that a traction is or will be provided by the first traction system, and automatically control the second propulsion unit by the control unit in dependence of the manually controlled torque from the first propulsion unit.
    Type: Application
    Filed: March 9, 2012
    Publication date: April 16, 2015
    Applicant: VOLVO LASTVAGNAR AB
    Inventors: Lena Larsson, Jan Öberg, Filip Alm
  • 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: 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: 8965609
    Abstract: An electric vehicle is presented. The electric vehicle may include a front motor for driving a front wheel; a rear motor for driving a rear wheel; a target torque determiner for determining a target torque of the front motor and a target torque of the rear motor, based on at least a displacement amount of an accelerator operation member operated by a driver; and a motor controller for controlling the front motor and the rear motor to cause the front motor to output the target torque and the rear motor to output the target torque.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: February 24, 2015
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventor: Izumi Takagi
  • Patent number: 8885304
    Abstract: A drive force distribution control apparatus in which if a relay output voltage (Vah) detected by relay-output-voltage detecting means (30) is lower than a first threshold, the relay is repeatedly and successively turned on and off multiple times, and then if the relay output voltage (Vah) detected later by the relay-output-voltage detecting means (30) while an engine speed (Er) is higher than a second threshold and an ignition switch (IG) is on is still lower than the first threshold, it is determined that there is an abnormality that keeps the relay stuck open, and then control for switching the drive mode from a four-wheel-drive mode to a two-wheel-drive mode is executed.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: November 11, 2014
    Assignee: Jtekt Corporation
    Inventor: Kiyoshige Kato
  • Patent number: 8886436
    Abstract: A driving force control apparatus includes: a turning radius estimating unit that estimates a turning radius of a four-wheel-drive vehicle; a target slip angle computing unit that computes a target slip angle at the time of turning of the four-wheel-drive vehicle, on the basis of the estimated turning radius; a target rotational speed computing unit that computes target rotational speeds of right and left rear wheels of the four-wheel-drive vehicle, on the basis of the estimated turning radius, the computed target slip angle, and a vehicle speed; and a driving force control unit that controls driving forces that are transmitted to the right and left rear wheels such that actual rotational speeds of the right and left rear wheels approach the computed target rotational speeds.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: November 11, 2014
    Assignee: JTEKT Corporation
    Inventor: Akira Kodama
  • Patent number: 8874309
    Abstract: A method for acquiring information from a driving operation of a vehicle, in which first information is acquired with respect to at least one operating state of the vehicle and additional second information is ascertained with respect to this at least one operating state using statistical methods, the first and second information concerning this at least one operating state being stored. A method for the assigning and diagnosis of at least one operating state of a vehicle, a control unit, a computer program and a computer-program product are also provided.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: October 28, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Andreas Genssle, Michael Kolitsch, Tobias Pfister
  • Patent number: 8862359
    Abstract: A hydrostatic drive system includes an anti-slip control unit having a hydraulic pump which supplies a plurality of hydraulic motors of a plurality of axles with pressure medium. Based on a detected slip, a control device switches over between a two-wheel and a multiple-wheel drive and controls the driving torque. Optimal distribution of driving torque and traction between the axles or wheels of the drive system is set in the drive system. A method for anti-slip control of a hydrostatic drive system includes reacting to a slip situation by activating a hydraulic motor for axles or wheels which until then were not driven, or driven only with low driving torque or by increasing the driving torque of wheels which until then did not slip. The capacity of the hydraulic motor of the axles or wheels is raised to enable the activation/increase.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: October 14, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Michael Brand
  • Publication number: 20140297150
    Abstract: A driving force distribution control apparatus for a four-wheel drive vehicle includes a theoretical value calculator, a normative value calculator, and a servo controller. The theoretical value calculator is configured to calculate a primary rotational speed theoretical value of primary drive wheels and a secondary rotational speed theoretical value of secondary drive wheels based on a steering angle, a vehicle speed, a yaw rate, and a slip angle of the four-wheel drive vehicle and configured to calculate a rotational difference normative theoretical value indicating a difference between rotational speed theoretical values of input and output shafts of a drive force distribution apparatus using the primary rotational speed theoretical value and the secondary rotational speed theoretical value.
    Type: Application
    Filed: March 27, 2014
    Publication date: October 2, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Shoichi OHYAGI, Norihisa NIHANDA, Takayuki SEKI, Satoki WATANABE
  • Patent number: 8825334
    Abstract: A vehicle behavior control apparatus is equipped with a slip angle detector that detects a slip angle of a vehicle, a control amount calculation portion that calculates a control amount from the slip angle detected by the slip angle detector, a derivative of the slip angle, and a second order derivative of the slip angle, and a control portion that executes a behavior control for the vehicle based on the calculated control amount.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: September 2, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Ryochi Watanabe
  • Patent number: 8812182
    Abstract: A control system (1) for a vehicle (10) with two axle drive devices (5, 12) has an engine control device (28) for controlling a first axle drive device (5) for driving a first axle of the vehicle (10) by a connected combustion engine (14) in a two-wheel drive mode and by a four-wheel drive mode. The control system (1) also has a control device (26) for controlling a second electric axle drive device (12) for driving a second axle of the vehicle in a four-wheel drive mode. The control device (26) is connected to the engine control device (28) for passing on at least one characteristic diagram to the engine control device (28).
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: August 19, 2014
    Assignee: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventors: Stephan Hennings, Stefan Unger
  • Publication number: 20140222309
    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 (FIG. 11).
    Type: Application
    Filed: April 9, 2014
    Publication date: August 7, 2014
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Makoto YAMAKADO, Shinjiro SAITO, Atsushi YOKOYAMA, Junya TAKAHASHI, Tatsuya YOSHIDA
  • Patent number: 8751132
    Abstract: A method for ascertaining a wheel reference speed of a wheel of a vehicle having a hydrostatic drive which uses a transfer medium, the hydrostatic drive acting at least on the one wheel, and the hydrostatic drive having an oscillating motor which may be swiveled to a pumping mode via which a torque may be applied to the wheel, and a wheel speed sensor for detecting the particular wheel speed being situated near the wheel, and the oscillating motor being appropriately adjusted while the wheel speed sensor ascertains the wheel reference speed in order to allow resistance-free flow of the transfer medium through the oscillating motor. The exemplary embodiments and/or exemplary methods of the present invention further relates to a device having arrangements for carrying out the method, and configured as a hydraulic drive control unit, for example.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: June 10, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Martin Grepl
  • 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: 8738266
    Abstract: A vehicle has at least two drive wheels which can be driven in each case by single-wheel drive units which are in particular of structurally identical dimensions and which can be actuated by means of a control device, control device determines a target torque which, in a torque distribution unit, can be divided into a first target torque for the first drive unit and a second target torque for the second drive unit. The torque distribution unit is assigned an adjustment unit by means of which the first and/or the second target torque can be corrected with an adjustment factor which can be determined as a function of a torque difference, arising owing to manufacturing and/or component tolerances, between the drive units.
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: May 27, 2014
    Assignee: Audi AG
    Inventors: Alexander Kruse, Ruben Maier, Michael Wein
  • Patent number: 8720633
    Abstract: A vehicle driveline includes a power source, a transmission connected to the power source and including an output driveably connected to primary road wheels, a driveshaft, a synchronizer that opens and closes a drive connection between the output and the driveshaft, and a clutch that alternately opens and closes a drive connection between the driveshaft and secondary road wheels. A control executes synchronization and connection strategies using one of singular, overlapping and sequential activation of the driveline components that produce all-wheel-drive on-demand.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: May 13, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Peter J. Grutter, Andreas E. Perakes, Nicholas E. McCubbin, Ashok E. Rodrigues, Robert S. Lippert
  • Patent number: 8718897
    Abstract: Embodiments of the invention are directed toward a geared traction drive system configured to drive a wheel of a vehicle, comprising: a driveshaft for transmitting power to the wheel; an electric drive motor for driving the driveshaft, the electric drive motor configured to receive signals from a vehicle dynamic control system to command a required speed; a gear reduction component for reducing the speed of the motor by a predetermined factor to a lower speed suitable for driving the wheel; and a drive electronics component that works with the electric drive motor to drive the wheel to the speed commanded by the vehicle dynamic control system.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: May 6, 2014
    Assignee: Wrightspeed, Inc.
    Inventors: Ian Wright, Ryan Cash
  • Publication number: 20140114520
    Abstract: A vehicle driving system includes a slip detector that detects an occurrence of excess slipping; an additive/subtractive slip point calculator that time-discretely calculates an additive/subtractive slip point, which is an additive slip point or a subtractive slip point, on the basis detection or non-detection of an occurrence of excess slipping; a cumulative slip point calculator that sequentially calculates a cumulative slip point that is a cumulative sum of values of the additive/subtractive slip point; and a driving mode switcher that switches between a two-wheel driving mode and an all-wheel driving mode on the basis of the cumulative slip point. When excess slipping is detected, the additive/subtractive slip point calculator calculates the additive slip point on the basis of a driving force correlation value that correlates to a driving force a driving wheel for which the excess slipping has occurred.
    Type: Application
    Filed: October 17, 2013
    Publication date: April 24, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Satoshi ANDOU, Masatoshi NOGUCHI
  • Patent number: 8706331
    Abstract: A two wheeled vehicle with a first wheel and a second wheel includes a first electrical motor operable to drivingly rotate the first wheel and a second electrical motor operable to drivingly rotate the second wheel. The vehicle also includes a controller operable to independently control the first and second electrical motors to drive rotation of the first and second wheels independent of each other.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: April 22, 2014
    Assignee: BOXX Corp.
    Inventor: Eric Vaughn Meyers
  • Patent number: 8666628
    Abstract: A torque distribution control apparatus for a four-wheel drive vehicle includes a vehicle-speed detector configured to detect a vehicle speed of the vehicle. A wheel-speed detector is configured to detect wheel speeds of main driving wheels and sub-driving wheels of the vehicle. A sub-driving-wheel distribution-torque calculator is configured to calculate a sub-driving-wheel distribution torque in accordance with a rotation speed difference between the main driving wheels and the sub-driving wheels calculated based on an output from the wheel-speed detector. A torque limiter is configured to limit an upper limit of the sub-driving-wheel distribution torque. A controller is configured to control the sub-driving-wheel distribution torque to be transmitted to the right and left sub-driving wheels by right and left torque distribution clutches in accordance with a driving state of the vehicle.
    Type: Grant
    Filed: June 27, 2010
    Date of Patent: March 4, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Masatoshi Noguchi, Nor Hairuddin, Yusuke Sakaguchi
  • Patent number: 8666582
    Abstract: A vehicle steering feel improving apparatus is provided for a vehicle, wherein the vehicle is capable of running with a road wheel driven by a driving force from a power source. The vehicle steering feel improving apparatus includes a steering operation detecting means that detects a condition that steering operation is being performed to steer a steerable wheel of the vehicle. A driving force fluctuating means repeatedly fluctuates the driving force to the road wheel, while the steering operation detecting means is detecting the condition that steering operation is being performed.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: March 4, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yusuke Kageyama, Kazuhito Kato
  • Patent number: 8655538
    Abstract: A display system for an agricultural vehicle includes a display for displaying a representation of the vehicle's location in a field in which the vehicle is operating and a control device for receiving an indication of an operating state of the vehicle and for controlling a viewing mode of the display according to the operating state.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: February 18, 2014
    Assignee: AGCO Corporation
    Inventors: Edward L. Swenson, Paul Matthews
  • 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: 8626404
    Abstract: The described system and method are implemented within a motor grader or other machine for grading of surfaces, wherein the machine includes a ground engaging element, as well as one or more blades for removing surface material. In this context, the described system and method prevent slippage of the ground engaging element against the underlying surface. In an embodiment, a torque limit is applied, wherein the torque limit corresponds to a torque that is less than that required for slippage under the current operating conditions, thus avoiding the problems caused by both overly aggressive and overly conservative cut depth strategies.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: January 7, 2014
    Assignee: Caterpillar Inc.
    Inventors: Norval P. Thomson, Gregory Durst, Martin Lehman, Shane McBride, Daniel P. Sergison
  • Patent number: 8620527
    Abstract: According to one aspect, a vehicle control system. The control system includes a steering control coupled to at least one steerable wheel, the steering control having a first position, a second position and a plurality of positions therebetween. The control system also includes a steering sensor coupled to the steering control and configured to generate steering sensor signals based upon the position of the steering control. The control system also includes a control module coupled to the steering sensor, the control module configured to (i) record a first steering sensor signal value when the steering control is in the first position; (ii) record a second steering sensor signal value when the steering control is in the second position; and (iii) determine a current position of the steering control by comparing the first and second steering sensor signal values with a current steering sensor signal value.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: December 31, 2013
    Assignee: Acellerated Systems Inc.
    Inventors: Terence Wade Stone, Robert Gordon Lankin
  • Patent number: 8606478
    Abstract: A system and a method are provided for controlling a foundation brake of a vehicle having at least one foundation brake device, wherein the usability of the foundation brake is limited to a predetermined total application-time of the foundation brake within a predetermined time interval.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: December 10, 2013
    Assignee: Volvo Lastvagnar AB
    Inventors: Jens Samsioe, Peter Lingman
  • Patent number: 8584786
    Abstract: A vehicle driveline comprising a primary drive system including at least one primary drive wheel and an auxiliary drive system including at least one auxiliary drive wheel is disclosed. The vehicle driveline may further comprise a system for idling the auxiliary drive system. The system may include at least one wheel disconnect device for selectively connecting and disconnecting the auxiliary drive wheel from the auxiliary drive system and a power transfer unit for selectively engaging and disengaging the auxiliary drive system from the primary drive system. The power transfer unit may include a multi-plate clutch in series with a dog clutch.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: November 19, 2013
    Assignee: Eaton Corporation
    Inventor: John Allen Grogg
  • Patent number: 8577562
    Abstract: The construction vehicle is provided with an engine, a clutch, a travel device, a work equipment, a drive force setting dial, and a controller that includes: a theoretical value determination unit that determines a theoretical value, for the degree of engagement to make the upper limit value of the drive force equal to a set drive force; an operational state determination unit that determines whether the work equipment is outputting the drive force in a predetermined travel direction; a drive force determination unit that determines whether the drive force is greater than the set drive force; and a degree of engagement reduction unit that, if of operational state determination and of drive force determination are both affirmative, causes the degree of engagement to approach the theoretical value.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: November 5, 2013
    Assignee: Komatsu Ltd.
    Inventors: Mamoru Tochizawa, Koji Takahashi, Yoshiaki Saito
  • Patent number: 8560144
    Abstract: A method for controlling torque in a vehicle including monitoring a plurality of factors associated with an output torque request in response to an output torque request rate of change exceeding a predetermined threshold, and controlling rate limiting of a delivered output torque to achieve the output torque request rate of change based on the plurality of factors associated with the output torque request.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: October 15, 2013
    Assignee: GM Global Technology Operations LLC
    Inventor: Sean W. McGrogan
  • Patent number: 8543300
    Abstract: An engine driving force is calculated. A first-lag process is executed based upon the engine driving force to calculate an engaging torque between front and rear shafts. The resultant is output to a transfer clutch drive unit. A braking force according to a change of a driving force, which is decreased with the lapse of time based upon a temporal change of the engine driving force, is calculated by executing a first-order lead process. An acceleration sensitive target yaw moment based upon the braking force according to the change of the driving force is calculated, and a steering sensitive target yaw moment based upon a steering angle velocity is calculated by executing the first-order lead process. A braking force to be added to an inner wheel on a turn is calculated based upon these target yaw moment. The resultant is output to a brake drive unit.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: September 24, 2013
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Koji Matsuno
  • Patent number: 8527178
    Abstract: In apparatus for controlling operation of a four-wheel drive vehicle having a prime mover (engine), drive wheels driven by the prime mover and free wheels, a VC (viscous coupling; torque transferring device) installed between the drive wheels and free wheels to transfer torque generated in response to a difference between inputted and outputted rotation thereof, output of the prime mover is decreased based on a desired rotational speed of the drive wheels driven by the prime mover when calculated difference between inputted and outputted rotation of the VC is equal to or greater than a predetermined value, thereby enabling to control the driving force effectively so as to achieve required vehicle driving performance.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: September 3, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Masatoshi Noguchi, Hirohiko Totsuka, Yuji Okamura
  • Patent number: 8521385
    Abstract: A method of controlling a torque vectoring mechanism and an associated torque vectoring system are disclosed. The method can distribute torque between a left non-driven wheel and a right non-driven wheel of a vehicle based on a torque control value. The torque control value can be based on a change in yaw moment about a center of gravity of the vehicle. The change in yaw moment can be determined based on a reduction of lateral force on a driven axle due to both longitudinal and lateral slip on the driven wheels.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: August 27, 2013
    Assignee: e-AAM Driveline Systems AB
    Inventors: Gabriel Per Erik Ivar Trönnberg, Simon Ola André Yngve
  • Patent number: 8510007
    Abstract: A vehicle motion control device adjusts vibrations occurring in components of a vehicle so as to control the motion of a vehicle having independent drive assemblies for front wheels and for rear wheels. The vehicle motion control device includes a base request torque calculation unit that calculates first and second base request torques in response to a request made by the driver of a vehicle. A correction torque calculation unit calculates first and second correction torques used to adjust vibrations in a low-frequency band and in a high-frequency band of the vibrations of the components of the vehicle. An internal combustion engine control unit and a motor generator control unit control an internal combustion engine and a motor generator so that the first and second base request torques are corrected with the first and second correction torques.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: August 13, 2013
    Assignee: Denso Corporation
    Inventors: Katsuyuki Mori, Mamoru Sawada, Toshiki Matsumoto, Takeshi Sada
  • Patent number: 8483921
    Abstract: [Problem] A two-wheel?four-wheel drive switching for a traction-transmitting part time four-wheel drive vehicle in which a gear clutch for separating one of auxiliary driving wheels from a drive train is equipped can be carried out under a shock reduction. [Means for solving problem] In a case where a two-wheel?four-wheel drive switching request occurs during a traveling of the vehicle (step S11 and step S12), an operation of switching a traction-transmitting transfer from a non-transmitting state to a transmitting state is preceded (step S18 and step S22) and, thereafter, the gear clutch is engaged (step S21 and step S22) when a revolution speed difference ?Vw between main and auxiliary driving wheels is 0<?Vw<? along with an advance of the state switching of the transfer so that large shock and abnormal sound are not generated even if the gear clutch is switched from a released state to an engagement state.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: July 9, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Eigo Sakagami, Atsuhiro Mori
  • Publication number: 20130073167
    Abstract: A motor vehicle with four drive wheels mounted on first and second axles, including: a transfer shaft connected to the first axle and a controlled coupling that can transfer part of the torque from the transfer shaft to the second axle; a mechanism determining respective speeds of the first and second axles, and a torque distribution control system configured to determine a slip value representative of the speed difference between the first and second axles and to control the coupling. The torque distribution control system is further configured to control the coupling such as to suppress any torque transfer via the coupling when the average slip value over a pre-determined period exceeds a threshold.
    Type: Application
    Filed: April 11, 2011
    Publication date: March 21, 2013
    Applicant: RENAULT s.a.s.
    Inventors: Stephane Guegan, Richard Pothin, Nicolas Romani
  • Patent number: 8392068
    Abstract: A vehicle behavior control device (S) determines, by using a vehicle velocity (V), a transmission function (K(s)) which is determined based on a specification of the vehicle, receives as an input a wheel turning speed (?) obtained by differentiating a wheel turning angle (?) of left and right front wheels (FW1, FW2) with respect to time, and outputs a target yaw moment (My). The device (S) also calculates, by using the determined target yaw moment (My), a left-wheel-side forward/backward force (FxCL) imparted to a left wheel side (left front wheel FW1 and left rear wheel RW1) of a vehicle (10) and a right-wheel-side forward/backward force (FxCR) imparted to a right wheel side (right front wheel FW2 and right rear wheel RW2) of the vehicle (10).
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: March 5, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Ippei Yamazaki
  • Patent number: 8380365
    Abstract: A method of determining a sound nuisance level outside an aircraft, wherein an aircraft is fitted with a plurality of external microphones, then during a flight of the aircraft, sound levels are measured using on-board microphones and at least two components are measured of the speed of the aircraft relative to air, and thereafter the kurtosis of samples of the sound level measurements is calculated and a model is determined of variations in a sound nuisance level as function of the air speed components, with the sound nuisance level being determined as a function of the kurtosis.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: February 19, 2013
    Assignee: Eurocopter
    Inventor: Henri-James Marze
  • Patent number: 8374761
    Abstract: A driving force distribution control device for a four wheel drive vehicle having a mechanism that distributes the torque of an engine, which is transmitted to a main drive wheel, to a secondary drive wheel determines a first torque to be distributed to the secondary drive wheel on the basis of the engine torque, and corrects the determined first torque on the basis of a yaw rate deviation between a target yaw rate and an actual yaw rate of the vehicle. When an absolute value of the yaw rate deviation is equal to or greater than a predetermined value, the mechanism is controlled on the basis of the corrected torque.
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: February 12, 2013
    Assignees: Nissan Motor Co., Ltd., Hitachi, Ltd.
    Inventors: Yoshiyuki Fukuda, Tomoaki Fujibayashi, Hideyuki Arai
  • Patent number: 8348353
    Abstract: A brake control device that controls braking forces applied to wheels to stabilize the behavior of a vehicle turning a corner, and includes a turning condition detection unit detecting a turning condition of the vehicle; a braking amount setting unit setting braking amounts for the respective wheels based on the turning condition detected by the turning condition detection unit; a brake control unit applying braking forces to the wheels according to the braking amounts set by the braking amount setting unit; and a road surface friction coefficient estimation unit estimating a road surface friction coefficient of the road on which the vehicle is running. The braking amount setting unit changes upper limits of the braking amounts for the respective wheels according to the road surface friction coefficient when the vehicle is in a center differential lock mode or a direct four-wheel drive mode.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: January 8, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshihisa Yamada, Yasushi Kobayashi, Tatsushi Takasu, Kota Shimoga
  • Patent number: 8335602
    Abstract: A system for controlling a power propulsion unit of a hybrid type for a four-wheel-drive automotive vehicle that includes at least one electric motor part and at least one thermal engine part capable of driving the independent front and rear driving axles of the vehicle. The system includes a mechanism determining total torque set point from a request of the driver, a mechanism distributing the total torque set point, and a system optimizing the duty point, to dynamically determine the torques to be applied to each of the two driving axles and to optimize fuel consumption of the power propulsion group according to the drivability requested by the driver and driving conditions.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: December 18, 2012
    Assignee: Renault S.A.S.
    Inventors: Francois Fauvel, Tariq Ouaguenouni, Frederic Roudeau