Antispin, Traction Control, Or Drive Slip Control Patents (Class 701/82)
  • Patent number: 11001246
    Abstract: This electric brake device includes: a brake rotor, a friction member, a friction member operator, an electric motor, and a controller which controls, by controlling the electric motor, a braking force generated as a result of contact between the friction member and the brake rotor. The electric brake device includes a vehicle speed estimator which estimates the speed of the vehicle having the electric brake device mounted thereon. The controller includes a power limiter which limits the power that drives the electric motor. When an estimated vehicle speed, which is the speed of the vehicle estimated by the vehicle speed estimator, is in a determined low-speed range, the power limiter limits the power in accordance with a condition that has been determined such that the maximum power consumption of the electric brake device decreases in accordance with decrease in the estimated vehicle speed.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: May 11, 2021
    Assignee: NTN CORPORATION
    Inventor: Yui Masuda
  • Patent number: 10940758
    Abstract: Terrain assist apparatus and related methods for use with vehicles are disclosed. An example apparatus includes a vehicle controller configured to determine, based on vehicle sensor data, a condition of a vehicle associated with driving on sand. The vehicle controller is also to generate, via an output device, information instructing a vehicle occupant to configure a driving mode of the vehicle that is associated with controlling vehicle speed. The vehicle controller is also to control a parameter of the vehicle based on a setting of the driving mode to resolve the condition.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: March 9, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Bang Kim Cao, Michael Edward Brewer, Brandon Cameron, William Gregory Suter, David John Messih, Christopher Wernette
  • Patent number: 10906521
    Abstract: System including an effort-monitoring system is configured to control tractive efforts (TEs) individually produced by propulsion-generating vehicles in a vehicle system. The effort-monitoring system is configured to control each of the propulsion-generating vehicles to provide a respective prescribed TE. The vehicle system operates at a system TE when each of the propulsion-generating vehicles is providing the respective prescribed TE. The prescribed TEs are determined by at least one of an operating plan of the vehicle system or a regulation that limits TE or ground speed of the vehicle system. In response to determining that a first propulsion-generating vehicle is providing a reduced TE that is less than the prescribed TE of the first propulsion-generating vehicle, the effort-monitoring system is configured to control a second propulsion-generating vehicle to exceed the prescribed TE of the second propulsion-generating vehicle so that the vehicle system is operating at or below the system TE.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: February 2, 2021
    Assignee: TRANSPORTATION IP HOLDINGS, LLC
    Inventors: Brian Douglas Lawry, Jared Klineman Cooper
  • Patent number: 10703376
    Abstract: A method is described for controlling the automatic starting of a motor vehicle comprising an electronically controllable locking differential, uphill in a split mu situation. The method comprises the following steps: determining the positive gradient of the underlying surface; defining an initial locking torque on the basis of the determined positive gradient and on the basis of a component of the torque which the vehicle requires to travel uphill with only the first driven wheel powered; calculating the slip ratio SRxx for the first driven wheel xx according to SRxx=(Vxx?VRef)/VCrit if the reference velocity VRef is between 0 and a critical velocity VCrit, and according to SRxx=(Vxx?VRef)/VRef if the reference velocity VRef is higher than the critical velocity VCrit; and defining the locking torque of the electronically controllable locking differential on the basis of the slip ratio of the first driven wheel.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: July 7, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Cyril Coerman, Lucian Lippok, Robert Barend Ter Waarbeek, Georg Johann Maurer
  • Patent number: 10493845
    Abstract: A drive force control device, which controls a drive force distribution device that distributes a drive force to right and left rear wheels at variable distribution ratios, computes a steering angle-based turning radius determined in accordance with a steering angle, computes a limit turning radius, which is a minimum value of the turning radius with which the vehicle is turnable while keeping a stable travel state, in accordance with a vehicle speed, sets the larger one of the steering angle-based turning radius and the limit turning radius as a target turning radius, computes target rotational speeds for the right and left rear wheels on the basis of the target turning radius and the vehicle speed, and adjusts the ratios of distribution of the drive force to the right and left rear wheels such that actual rotational speeds of the right and left rear wheels approximate the target rotational speeds.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: December 3, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Go Nagayama, Akira Kodama
  • Patent number: 10414288
    Abstract: Calculating a current target position value for controlling a traction speed of a materials handling vehicle, that includes receiving steering command signals; generating an output value proportional to a rate of change of the steering command signals; determining whether the output value is greater than or equal to a predetermined threshold; determining a raw target position value for controlling the traction speed of the materials handling vehicle; and calculating the current target position value based on: whether the output value is greater than or equal to a predetermined threshold, and whether the raw target position value is less than or equal to a previously calculated target position value for controlling the traction speed.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: September 17, 2019
    Assignee: Crown Equipment Corporation
    Inventor: Stephen Mangette
  • Patent number: 10414393
    Abstract: Systems and methods for detecting an oscillation of a vehicle. The system comprises a sensor configured to detect an oscillation of the vehicle, and an electronic controller configured to receive an oscillation signal from the sensor, compare the oscillation signal to a detection threshold, and in response to the comparison of the oscillation signal to the detection threshold, generate a signal to activate a braking system of the vehicle and generate a request to reduce torque in an engine of the vehicle.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: September 17, 2019
    Assignee: ROBERT BOSCH GMBH
    Inventor: Peter Ehmann
  • Patent number: 10351164
    Abstract: A vehicle control device is provided, which includes a drive source configured to generate torque as driving force of a vehicle, a transmission torque control mechanism configured to control transmission torque to drive wheels according to the generated torque, and a processor configured to execute a vehicle attitude controlling module to perform a vehicle attitude control by controlling the transmission torque control mechanism to reduce the transmission torque so as to decelerate the vehicle when a starting condition that the vehicle is traveling and a steering angle related value increases is satisfied, and then, when a given terminating condition is satisfied, controlling the mechanism to resume the transmission torque back to the torque before being reduced. The transmission torque is controlled so as to cause a yaw rate that occurs in the vehicle while the vehicle attitude control is performed, to be lower than an upper limit yaw rate.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: July 16, 2019
    Assignee: Mazda Motor Corporation
    Inventors: Daisaku Ogawa, Daisuke Umetsu, Osamu Sunahara, Yasunori Takahara, Yuichiro Akiya, Chikako Ohisa, Atsushi Yamasaki, Keiichi Hiwatashi
  • Patent number: 10336364
    Abstract: A vehicle control device is provided, which includes an engine, an engine control mechanism configured to control torque generated by the engine, a processor configured to execute a vehicle attitude controlling module to control attitude of a vehicle by controlling the engine control mechanism to reduce the torque so as to decelerate the vehicle, when a condition that the vehicle is traveling and a steering angle related value that is related to a steering angle of a steering device increases is satisfied, and a torque reduction amount setting module to set the reduction amount of the torque to be larger as a combustion frequency of the engine per unit time decreases. The vehicle attitude controlling module controls the engine control mechanism to reduce the torque based on the set reduction amount.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: July 2, 2019
    Assignee: Mazda Motor Corporation
    Inventors: Daisaku Ogawa, Daisuke Umetsu, Osamu Sunahara, Yasunori Takahara, Yuichiro Akiya, Chikako Ohisa, Atsushi Yamasaki, Keiichi Hiwatashi
  • Patent number: 10322648
    Abstract: The invention relates to a control device for a voltage transformer of an electrically operated vehicle, which voltage transformer feeds an n-phase electric machine, n>1. The control device comprises an observer unit, which is designed to determine a present rotational speed of the electric machine and a present output current of the voltage transformer, a computing unit, which is coupled to the observer unit and which is designed to compute an instantaneous wheel speed of the wheels of the vehicle in dependence on the determined present rotational speed, and a slip control unit, which is coupled to the computing unit and which is designed to at least temporarily apply a current correction amount to the output current of the voltage transformer if the present change of the wheel speed of the wheels exceeds a first predetermined threshold value.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: June 18, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Emile Kruijswijk, Julien Kuehl, Markus Becker, Vincent Schulte-Coerne
  • Patent number: 10155532
    Abstract: A combined angular position and torque sensor assembly for use in an electric power assisted steering system having an input part for connection to an upper column shaft, an output part for connection to a lower column shaft, a torsion bar that interconnects the input shaft and the output shaft, first and second upper column angular position sensors that each produce at least one output signal that is dependent on the angular position of the upper column shaft; and a processing means unit which produces a first torque signal indicative of the torque carried by the torsion bar. The processing unit further includes a component for producing a first absolute angular position signal by processing the output signals of the first and secondary sensors in a first way and a second absolute angular position signal processing the output of the same two sensors in a different way, and further includes a cross checker that performs a cross check between the two absolute position signals.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: December 18, 2018
    Assignee: TRW Limited
    Inventor: James Owen Patrick Farrelly
  • Patent number: 10144431
    Abstract: A control device and method are provided for launch assistance for a motor vehicle having an internal combustion engine as drive engine. The control device is designed to predict a stall of the internal combustion engine of the motor vehicle on the basis of at least one signal, and, if a stall of the internal combustion engine is predicted, to output a signal for initiating launch assistance. The control device is designed to predict the stall of the internal combustion engine on the basis of the engine rotational speed of the internal combustion engine and the gradient of the engine rotational speed of the internal combustion engine before the clutch-engagement rotational speed is reached. If a stall of the internal combustion engine is predicted, the control device is designed to output a signal for initiating an increase of the engine torque demand of the internal combustion engine.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: December 4, 2018
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventor: Eberhard Boemcke
  • Patent number: 10126738
    Abstract: Methods and systems for improving tire uniformity through identification of characteristics of one or more candidate process effects are provided. The magnitudes of process harmonics associated with one or more candidate process effects can be identified by combining uniformity measurements for a set of tires to achieve an enhanced resolution for a sampling of the process harmonic. The enhanced resolution approach can combine uniformity measurements for a set of a plurality of tires that are slightly offset from one another to generate a composite process harmonic sampling. In particular, the composite process harmonic sampling can be generated by aligning the uniformity measurements for each tire in the set of tires based on the azimuthal location of the maximum magnitude of the process harmonic on each tire. The magnitude of the process harmonic can then be determined using the composite process harmonic sampling.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: November 13, 2018
    Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventor: William David Mawby
  • Patent number: 9663095
    Abstract: A traction control device reducing an output of an engine unit for suppressing a spin of a driving wheel of a motorcycle, includes: a first spin detection unit detecting a spin of a rear wheel based on a vehicle speed calculated from a rotation of a front wheel being a driven wheel to which a driving force is not transmitted from the engine unit, and a vehicle speed calculated from a rotation of the rear wheel being the driving wheel to which the driving force is transmitted; and a second spin detection unit detecting the spin of the rear wheel based on a vehicle speed calculated from the rotation of the front wheel, and a vehicle speed calculated from a rotation of the engine unit.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: May 30, 2017
    Assignee: SUZUKI MOTOR CORPORATION
    Inventors: Masahiro Hamamura, Yutaro Kobayashi, Kazunori Kawai
  • Patent number: 9555721
    Abstract: A slip control device for an electric automobile includes a maximum rotation frequency calculator to calculate a drive wheel maximum rotation frequency Nmax on the basis of a rotation frequency N1 of a driven wheel and an ideal slip ratio ?min according to the formula (Nmax?N1)/N1=?min. It is determined whether a drive wheel rotation frequency N2 exceeds the frequency Nmax. If it is determined that the frequency N2 exceeds the frequency Nmax, a torque command value to a motor unit is made to be zero.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: January 31, 2017
    Assignee: NTN CORPORATION
    Inventors: Yingjie Zhang, Junichi Hirata
  • Patent number: 9387843
    Abstract: A method for controlling the traction slip of driven wheels of a vehicle between the wheels and the carriageway, in the case of which a manipulated variable is calculated for a drive engine of the vehicle on the basis of a detection of the instantaneous wheel speed and the calculation of a desired wheel speed, the manipulated variable being formed by an upper limit value for the rotational speed of the drive engine, characterized in that the instantaneous transmission ratio is calculated on the basis of the instantaneous rotational speed of the drive engine and the instantaneous wheel speed, and the upper limit value for the rotational speed of the drive engine is calculated from the desired wheel speed and the instantaneous transmission ratio.
    Type: Grant
    Filed: February 19, 2007
    Date of Patent: July 12, 2016
    Assignee: KNORR-BREMSE SYSTEME FUER NUTZFAHRZEUGE GMBH
    Inventor: Andreas Ziegler
  • Patent number: 9272715
    Abstract: The steering assistance display device according to this invention includes: a determination unit determining a radius of a curved road on which a vehicle travels, and a velocity and a steering angle of the vehicle; a calculation unit calculating a direction of travel of the vehicle on the basis of an inertial force determined on the basis of the radius and the velocity of the vehicle, and the steering angle; and a display unit displaying by a head-up display a direction of travel.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: March 1, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshiyuki Muramatsu, Takashi Ohsawa
  • Patent number: 9180743
    Abstract: Embodiments can provide a system, a wheel localizer, a wheel localization device, a method or a computer program for locating a position of wheel and/or for determining an acceleration of a wheel of a vehicle. The system for locating a position of at least one out of a plurality of wheels of a vehicle includes a detector configured to obtain information related to a tangential acceleration of the at least one wheel of the vehicle and a unit configured to obtain information related to angular rotations of the plurality of wheels. The system further includes a locator configured to determine the position of the at least one wheel based on the information related to the tangential acceleration of the at least one wheel and the information related to the angular rotations of the plurality of wheels.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: November 10, 2015
    Assignee: Infineon Technologies AG
    Inventors: Joo Il Park, Thomas Lange, Karine Pillet, Myungkil Kim
  • Patent number: 9170770
    Abstract: A vehicle controller has multiple vehicle control modes that have different output characteristics of a travel power source relative to an accelerator operation amount. The vehicle control modes include a poor road travel mode used during travel on a poor road, and a first normal travel mode and a second normal travel mode that are used during travel other than on a poor road. A rate of increase in an output of the travel power source relative to a predetermined accelerator operation amount during an initial stage of an accelerator operation is set to increase steadily in order of the poor road travel mode, the first normal travel mode, and the second normal travel mode. When the poor road travel mode is selected, a mode transition to the first normal travel mode is permitted but a mode transition to the second normal travel mode is prohibited.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: October 27, 2015
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Toru Murofushi
  • Patent number: 9163386
    Abstract: A work vehicle is provided with an engine, a hydraulic pump, a movement hydraulic motor, an acceleration operation member, and a control section. The hydraulic pump is driven by the engine. The movement hydraulic motor is driven by hydraulic fluid which is discharged from the hydraulic pump. The acceleration operation member is operated in order to set a target rotation speed for the engine. The control section is configured to perform traction control where the maximum traction force is reduced by limiting the displacement of the movement hydraulic motor to an upper limit displacement which is smaller than the maximum displacement. The control section increases the upper limit displacement of the movement hydraulic motor according to an increase in the operation amount of the acceleration operation member or the engine rotation speed in the traction control.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: October 20, 2015
    Assignee: KOMATSU LTD.
    Inventor: Atsushi Shirao
  • Patent number: 9062614
    Abstract: Methods and systems are provided for adjusting an engine output delivered in response to an operator pedal actuation based at least on a grade of vehicle travel. During uphill travel, in the presence of headwinds, and/or in the presence of a vehicle payload, the output may be increased while during downhill travel or in the presence of tailwinds, the output may be decreased. In this way, driver fatigue during travel over varying elevations, varying ambient conditions, and varying loads can be reduced.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: June 23, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Steven Joseph Szwabowski, Craig Thomas Hodorek
  • Patent number: 9045055
    Abstract: A method and arrangement for preventing slip in a wheeled vehicle having two or more driving wheels that are operated with electric motors. The motor of each driving wheel includes a torque limit applicable to limit torque of the motor. For each driving wheel, the method includes setting an angular acceleration limit for the wheel, detecting angular acceleration of the driving wheel continuously, comparing the detected angular acceleration with the angular acceleration limit continuously, if the detected angular acceleration is higher than the angular acceleration limit, reducing the torque limit from its current value until the angular acceleration of the wheel is below the angular acceleration limit, increasing the torque limit at a first rate to a value lower than the value from which it was reduced, and increasing the torque limit at a second rate to the maximum value, the second rate being lower than the first rate.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: June 2, 2015
    Assignee: ABB OY
    Inventor: Markku Talja
  • Patent number: 9043107
    Abstract: A vehicle yaw stability control method and a vehicle yaw stability control apparatus are provided. The yaw rate {dot over (?)} of the vehicle is measured. A first reference yaw rate {dot over (?)}ref is set. A difference yaw rate ?{dot over (?)} is set. Stabilizing braking intervention is triggered when a value of the difference yaw rate ?{dot over (?)} exceeds limits defined by difference yaw rate threshold values ?{dot over (?)}min, ?{dot over (?)}max. Information regarding the shape of the road ahead of the vehicle is acquired. The reliability of the driver steering input ? is evaluated upon stabilizing braking intervention being triggered. In case the driver steering input ? is deemed unreliable a replacement reference yaw rate {dot over (?)}refroad is set based on the acquired road shape and a replacement difference yaw rate ?{dot over (?)}road is set whereupon stabilizing braking intervention is performed based on the replacement difference yaw rate ?{dot over (?)}road.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: May 26, 2015
    Assignee: Volvo Car Corporation
    Inventors: Mohammad Ali, Mattias Bengtsson, Per Landfors
  • Patent number: 9043112
    Abstract: A method of signalling an aquaplaning condition of a tire, the latter rolling on a rolling surface, a footprint area being defined between the tire and the rolling surface, a layer of water being interposed between the tire and the rolling surface, includes: detecting a first signal representative of a deformation of the tire due to rolling of the tire on the rolling surface, the first signal including at least one portion representative of the interaction between the tire and the layer of water; processing the first signal so as to determine a parameter representative of an aquaplaning condition of the tire as a function of the first signal; and generating a notification signal as a function of the at least one parameter. A system for signalling an aquaplaning condition of a tire.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: May 26, 2015
    Assignee: PIRELLI TYRE S.P.A.
    Inventors: Massimo Brusarosco, Federico Mancosu
  • Publication number: 20150134221
    Abstract: A control method of a tracked vehicle having a track belt and configured to advance the tracked vehicle provides for acquiring the driving speed of the tracked vehicle; acquiring the speeds of the tracks with respect to the tracked vehicle; calculating a range of expected values of traveling speed as a function of speed of the track; and varying the speed of the track when the traveling speed of the tracked vehicle is outside the range of expected values.
    Type: Application
    Filed: May 28, 2013
    Publication date: May 14, 2015
    Inventor: Martin Pelletier
  • Patent number: 9031760
    Abstract: A tractive force control part of a wheel loader is configured to perform a tractive force control to reduce a maximum tractive force. The tractive force control part is further configured to reduce the maximum tractive force when determination conditions including, while a working implement is performing excavation operation, that the working implement is in a raising hydraulic stall condition and that a drive circuit pressure is greater than or equal to a predetermined hydraulic pressure threshold are satisfied during the tractive force control.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: May 12, 2015
    Assignee: Komatsu Ltd.
    Inventor: Atsushi Shirao
  • Publication number: 20150127240
    Abstract: A saddle-straddling type motor vehicle on which an object is loadable for traveling with the motor vehicle. The motor vehicle includes a main body having a wheel, a motor that generates driving force for moving the main body, a wheel force calculator configured to calculate wheel force exerted between the wheel and a surface of a road on which the motor vehicle is traveling, and a wheel force corrector configured to correct the wheel force calculated by the wheel force calculator based on a condition of the object loaded on the motor vehicle.
    Type: Application
    Filed: October 31, 2014
    Publication date: May 7, 2015
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventor: Hisayuki NOZAWA
  • Patent number: 9026334
    Abstract: A vehicle attitude control system includes a control unit that calculates a front wheel control amount and a rear wheel control amount on the basis of a front-side slip angle at a front axle of front wheels and a rear-side slip angle at a rear axle of rear wheels, and that controls the front wheels on the basis of the front wheel control amount and controls the rear wheels on the basis of the rear wheel control amount at the same time.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: May 5, 2015
    Assignee: JTEKT Corporation
    Inventors: Shuuji Kimura, Masayasu Higashi
  • Patent number: 9014897
    Abstract: A torque distribution apparatus acquires instructed torque input and a motor efficiency map; detects vehicular speed and drive wheel rotational speed; calculates based on the speeds, a relational expression of a slip rate at drive wheels and a friction coefficient; creates based on the relational expression, a performance curve expression that indicates torque-drive wheel rotational speed relations, superimposes the performance curve expression on the motor efficiency map, creates an efficiency variation expression that indicates for each vehicular speed, the torque and efficiency values of the motor efficiency map, and calculates torque that optimizes efficiency, from the efficiency variation expression; calculates within a range of the slip rate being 0 to 0.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: April 21, 2015
    Assignee: Pioneer Corporation
    Inventors: Masahiro Kato, Eiji Muramatsu, Chihiro Kawabata, Kazutoshi Kitano, Kazunobu Hashimoto, Yoshikazu Takeuchi
  • Patent number: 9008938
    Abstract: A control system for controlling a driving power source in a vehicle, includes a driving state detector for detecting a driving state of the vehicle; a first determiner for determining whether or not the driving state detected by the driving state detector is a first state; a second determiner for determining whether or not the driving state detected by the driving state detector is a second state; a rotational speed limiter for executing rotational speed limiting control for limiting a driving power source rotational speed to a predetermined upper limit value or less when the first determiner determines that the driving state is the first state, during an operation of the driving power source; and a rotational speed limiting termination unit for terminating the rotational speed limiting control, when the second determiner determines that the driving state is the second state, during the operation of the driving power source.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: April 14, 2015
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventor: Yoshimoto Matsuda
  • 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: 9002610
    Abstract: A brake system and related components including a metering device are configured to regulate a control signal received from a brake control device such that a control valve delays the supply of a level of requested braking pressure for a prescribed amount of time. The metering device can be an inversion valve and orificed check valve in a control circuit adapted to allow relatively unrestricted flow until a threshold pressure is reached, after which pressure the inversion valve closes and the flow is metered through an orifice. This has the effect of allowing rapid brake actuation to a first level, and then slowing further application of the brake until full requested braking is achieved. An electronic control unit can also be configured to regulate a control signal to delay development of the requested brake pressure.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: April 7, 2015
    Assignee: Bendix Commercial Vehicle Systems, LLC
    Inventors: Charles E. Eberling, James M. Hamar, Travis G. Ramler, John V. Ripley
  • Patent number: 8983739
    Abstract: A method of estimating soil conditions of a work surface during operation of a track-type tractor measures current operating conditions and current operating state to develop adjustments to a nominal pull-slip curve. The adjusted pull-slip curve is used to calculate optimum performance in terms of an input variable such as track speed. Two factors are developed to reflect soil conditions, coefficient of traction and a shear modulus adjustment that affect different portions of the nominal pull slip curve.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: March 17, 2015
    Assignee: Caterpillar Inc.
    Inventor: Joseph Faivre
  • 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
  • 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: 8958968
    Abstract: A traction control device for a motorcycle eliminates a need for a waiting time for detecting an amount of change in a vehicle state and a subsequent prediction time, and can execute quick traction control. The traction control device includes an engine driving force control unit, for calculating a real slip ratio of the motorcycle, setting a target slip ratio according to a driving state of the motorcycle, and controlling a driving force of an engine so that the real slip ratio becomes the target slip ratio. The traction control device also includes a throttle grip opening degree sensor for detecting an opening degree of a throttle grip; and a bank angle sensor for detecting a bank angle of the motorcycle. The engine driving force control unit calculates the target slip ratio on a basis of the throttle opening degree and the bank angle of the motorcycle.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 17, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Fuyuki Kobayashi, Yoichiro Fukao, Yohei Maruyama, Tatsuya Ito
  • Patent number: 8958965
    Abstract: A vehicle includes a first disconnect disposed between a prime mover of the vehicle and a certain one of the vehicle drive wheels. The first disconnect is operable to connect and disconnect the prime mover to and from the certain one of the drive wheels. A second disconnect is disposed between the powertrain and the certain one of the drive wheels, and is operable to connect and disconnect the certain one of the drive wheels to and from the powertrain when the first disconnect is engaged. A control system and method are configured to control operation of at least the first and second disconnects. Through selective control of the disconnects, the system can be automatically placed in a four-wheel-drive mode based on predetermined criteria, or the desirability of the four-wheel-drive mode can be indicated to the vehicle operator in a passive version of the control system and method.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: February 17, 2015
    Assignee: Ford Global Technologies LLC
    Inventors: William Paul Perkins, Scott Howard Gaboury, Steven A. Daleiden
  • Publication number: 20150019103
    Abstract: A mobile robot configured to move on a ground. The mobile robot including a contact angle estimation unit estimating contact angles between wheels of the mobile robot and the ground and uncertainties associated with the contact angles, a traction force estimation unit estimating traction forces applied to the wheels and traction force uncertainties, a normal force estimation unit estimating normal forces applied to the wheels and normal force uncertainties, a friction coefficient estimation unit estimating friction coefficients between the wheels and the ground, a friction coefficient uncertainty estimation unit estimating friction coefficient uncertainties, and a controller determining the maximum friction coefficient from among the friction coefficients such that the maximum friction coefficient has an uncertainty less than a threshold and at a point of time when the torque applied to each of the wheels changes from an increasing state to a decreasing state, among the estimated friction coefficients.
    Type: Application
    Filed: February 24, 2014
    Publication date: January 15, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun Do CHOI, Suk June YOON
  • Publication number: 20150019102
    Abstract: A system and a method of controlling vehicle starting may include a wheel speed sensor detecting a speed of at least one wheel among wheels of the vehicle, a vehicle speed detector detecting a vehicle speed, an acceleration detector detecting a vehicle acceleration, a vertical acceleration sensor detecting a vertical acceleration of the vehicle, a wheel torque detector calculating a wheel torque, an ambient temperature sensor detecting an ambient temperature, and a controller. The controller may calculate a wheel slip amount based on the speed of at least one wheel, the vehicle speed and the vehicle acceleration, determine whether a wheel slip occurs by comparing the wheel slip amount with a first predetermined wheel slip amount, determine a road state based on the ambient temperature and the vertical acceleration of the vehicle if the wheel slip occurs, and perform a starting control according to the road state.
    Type: Application
    Filed: December 12, 2013
    Publication date: January 15, 2015
    Applicants: Kia Motors Corporation, Hyundai Motor Company
    Inventors: Joseph D. CHANG, Byeong Wook JEON, Dong Hoon JEONG
  • Publication number: 20150012201
    Abstract: Systems and methods for detecting the onset of wheel skids and controlling brake torque to achieve efficient and smooth braking performance are described herein. A brake control system may utilize an algorithm, along with substantially real-time measured values to assist with controlling brake torque to achieve efficient and smooth braking performance. A history of wheel speed information, such as wheel speed information associated with one or more landing event, may also be used to iteratively estimate tire/runway friction properties.
    Type: Application
    Filed: July 3, 2013
    Publication date: January 8, 2015
    Inventors: RICHARD PAUL METZGER, RICHARD KOLK
  • Patent number: 8930113
    Abstract: In general, the subject matter described in this specification can be embodied in methods, systems, and program products for performing vehicle traction control. Time intervals between points of rotation of a rotating vehicle output shaft are measured. Indicators of shaft rotation rate are generated using, for each generated indicator, a set of one or more of the time intervals. The generated indicators of shaft rotation rate are used to determine a value indicative of a rate of change of shaft rotation rate. An indicator of a maximum allowable output shaft rotation rate is computed. A current indicator of output shaft rotation rate is determined to exceed the maximum allowable output shaft rotation rate. In response to determining that the current indicator exceeds the maximum allowable output shaft rotation rate, a signal to trigger application of a traction control mechanism is output.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: January 6, 2015
    Assignee: Davis Intellectual Properties LLC
    Inventor: Shannon R. Davis
  • Patent number: 8924120
    Abstract: A regenerative brake control system for a vehicle includes a vehicle controller, a driveline torque distribution device interfacing with the vehicle controller, an electric machine interfacing with the driveline torque distribution device, a plurality of wheels coupled to the electric machine and at least one traction condition input indicating traction of the plurality of wheels provided to the vehicle controller. The vehicle controller engages the driveline torque distribution device and the electric machine apportions regenerative brake torque to the wheels in proportion to the traction of the wheels. A regenerative brake control method for a vehicle is also disclosed.
    Type: Grant
    Filed: June 6, 2009
    Date of Patent: December 30, 2014
    Assignee: Ford Global Technologies, LLC
    Inventor: William Paul Perkins
  • Patent number: 8909451
    Abstract: A motorcycle sets a target slip value based on an accelerator operation by a driver, and prevents a significant decrease in the output torque of the drive power source during execution of traction control to provide a comfortable ride. The motorcycle includes a target slip value calculating section that calculates a target slip value, based on an accelerator operation by a driver; and an actual slip value calculating section that calculates an actual slip value, based on the difference between the rotation speed of the front wheel and the rotation speed of the rear wheel. The motorcycle further includes a drive power source controller arranged and programmed to reduce the output torque of the drive power source, based on the difference between a criterion value different from the target slip value and the actual slip value when the actual slip value is lower than the target slip value.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: December 9, 2014
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Tomohiro Kinoshita, Hirokazu Fujita
  • Patent number: 8897937
    Abstract: A railcar control apparatus comprises a synchronous slide/slip detector which determines that the axles are synchronously sliding/slipping if an absolute value of axle's speed difference is less than a synchronous slide/slip speed difference threshold and an absolute value of axle's acceleration is greater than a predetermined synchronous slide/slip acceleration threshold.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: November 25, 2014
    Assignees: Kawasaki Jukogyo Kabushiki Kaisha, Mitsubishi Electric Corporation
    Inventors: Hisanosuke Kawada, Soichiro Bando, Hideaki Ezaki, Isao Suzumura, Yuji Katsuyama, Yoshiaki Wakabayashi
  • Patent number: 8892315
    Abstract: A method for controlling a continuously variable ratio transmission is described. The method may include controlling a continuously variable ratio unit (“variator”) having rotary input and output members through which the variator is coupled between an engine and a driven component, the variator receiving a primary control signal and being constructed and arranged to exert upon its input and output members torques which correspond directly to the control signal. The method may also include determining a target engine acceleration, determining settings of the variator's primary control signal and of an engine torque control for providing the required engine acceleration and adjusting the control signal and/or the engine torque control based on these settings, predicting a consequent engine speed change, allowing for engine and/or transmission characteristics, and correcting the settings of the control signal and engine torque based on a comparison of actual and predicted engine speeds.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: November 18, 2014
    Assignee: Torotrak (Development) Limited
    Inventors: Matthew Gibson Field, Stephen William Murray, Matthew Piers Burke
  • Patent number: 8886434
    Abstract: A method of stabilizing a vehicle is provided. The vehicle is travelling at a forward speed and a lateral speed, and comprises a lateral acceleration sensor, a yaw sensor adapted to detect an actual yaw rate of the vehicle around a central axis, a steering mechanism adapted to steer the vehicle by a steered yaw rate, and an electronic stability control system.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: November 11, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Kevin A. O'Dea, Flavio Nardi, Jihan Ryu
  • Publication number: 20140324296
    Abstract: A safety system for a motor vehicle having at least a front wheel arrangement having one or more wheels and rear wheel arrangement having one or more wheels, the arrangement having: a control unit; and one or more vehicle inertial sensors to detect acceleration experienced by the vehicle, the inertial sensors being connected to the control unit so the control unit receives output signals from the inertial sensors; and one or more vehicle safety systems which may be activated by the control unit, wherein the control unit is configured to process the signals received from the inertial sensors and to determine whether at least one of the wheels of the front and rear wheel arrangements is not in contact with the surface over which the vehicle is driven.
    Type: Application
    Filed: June 25, 2012
    Publication date: October 30, 2014
    Applicant: Autoliv Development AB
    Inventors: Moroine Laoufi, Alessandro Zin
  • 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
  • Patent number: 8849537
    Abstract: Disclosed is a technique for controlling the stability of a vehicle via in-wheel motors. More specifically, a steering angle, a wheel speed, a lateral G-Force, and a yaw rate calculated, and the lateral G-Force is compared with a predetermined lateral G-Force threshold. Next, a predetermined yaw rate control threshold is compared with a difference between an actual yaw rate and a demand yaw rate based on the calculated steering angle and wheel speed. The demand yaw rate and the actual yaw rate are then compared when the difference between the demand yaw rate and the actual yaw rate is greater than the yaw rate control threshold, and a final torque value is generated according to the difference between the demand yaw rate and the actual yaw rate.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: September 30, 2014
    Assignee: Hyundai Motor Company
    Inventor: Sangyon Yoon