Front-rear Axle Apportioning Or Speed Difference Patents (Class 303/186)
  • Patent number: 11440519
    Abstract: The present invention refers to a brake assist system (1) for cyclist on a bicycle (100) including a braking system (101) having a braking member (105) capable of exerting a braking force (FB) on a front wheel (101) of the bicycle (100) by the effect of a force (Fc) applied by the cyclist on a lever (103). The system (1) includes a sensor (2) for measuring the angular speed (?1) of the front wheel (101) of the bicycle (100); an actuator (3) capable of exerting an actuator force (FA), connectable to said braking system of the bicycle so that the actuator force (FA) opposes the force (Fc) applied by the cyclist on the lever (103), in order to reduce the braking force (FB); and a control module (4) configured for receiving, as an input, the signal representative of the angular speed (?1) of the front wheel (101) and for determining from this a deceleration (?) of the front wheel (101).
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: September 13, 2022
    Assignees: Blubrake s.r.l., Politecnico di Milano
    Inventors: Matteo Corno, Giulio Panzani, Sergio Matteo Savaresi, Fabio Todeschini, Luca D'Avico, Simone Fiorenti, Alessio Nicolò Cota
  • Patent number: 11097736
    Abstract: Methods and systems are provided for traction detection and control of a self-driving vehicle. The self-driving vehicle has drive motors that drive drive-wheels according to a drive-motor speed. Traction detection and control can be obtained by measuring the vehicle speed with a sensor such as a LiDAR or video camera, and measuring the wheel speed of the drive wheels with a sensor such as a rotary encoder. The difference between the measured vehicle speed and the measured wheel speeds can be used to determine if a loss of traction has occurred in any of the wheels. If a loss of traction is detected, then a recovery strategy can be selected from a list of recovery strategies in order to reduce the effects of the loss of traction.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: August 24, 2021
    Assignee: CLEARPATH ROBOTICS INC.
    Inventors: Ryan Christopher Gariepy, Shahab Kaynama
  • Patent number: 11027710
    Abstract: An emergency braking system for a vehicle includes an emergency braking control unit configured to control the emergency braking system according to a first parameter set. The first parameter set is selected by the emergency braking control unit from a plurality of parameter sets. Each respective parameter set of the plurality of parameter sets is associated with a respective vehicle variant and adapts the emergency braking system to the respective vehicle variant. Each respective vehicle variant is characterized by a design of a braking system of the respective vehicle variant for adapting the emergency braking system of the respective vehicle variant to the design of the braking system of the vehicle variant. The first parameter set is associated with a first vehicle variant that characterizes the vehicle.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: June 8, 2021
    Assignee: WABCO EUROPE BVBA
    Inventor: Karsten Breuer
  • Patent number: 10814853
    Abstract: A brake system having a wheel brake and being operable under a non-failure normal braking mode and a manual push-through mode. The system includes a master cylinder operable by a brake pedal during the manual push-through mode to provide fluid flow at an output for actuating the wheel brake. A first source of pressurized fluid provides fluid pressure for actuating the wheel brake under the normal braking mode. A second source of pressurized fluid generates brake actuating pressure for actuating the wheel brake under the manual push-through mode.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: October 27, 2020
    Assignee: ZF Active Safety US Inc.
    Inventor: Blaise Ganzel
  • Patent number: 10800388
    Abstract: A method for operating a motor vehicle brake installation. An electrically controllable pressure modulation device having a pump-valve arrangement is hydraulically arranged between the primary brake system and the front axle brakes. The pump-valve arrangement includes, for each front brake, a first valve, arranged between the inlet valve of the primary brake system and the brake, and an electrically activatable pump, with a suction and pressures ports. The pressure port is connected to the brake. In the presence of a predetermined condition of the primary brake system and of an actuation of the master brake cylinder by the driver, a build-up of brake pressure at the front axle brakes is performed by the pump-valve arrangement. The pressure set by the pump-valve arrangement is higher than the brake pressure in the master brake cylinder, whereas the brake pressure of the master brake cylinder prevails at the brakes of the rear axle.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: October 13, 2020
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Marco Besier, Georg Roll, Sascha Gröger, Andreas Neu, Cristiano Hoffmann
  • Patent number: 10597012
    Abstract: A vehicle brake control device includes a wheel deceleration calculating unit configured to calculate a wheel deceleration of each of wheels of a vehicle, and a front and rear wheel braking distribution controlling unit configured to execute a front and rear wheel braking distribution control for distributing a braking force on front and rear wheels. The front and rear wheel braking distribution controlling unit is configured to start the front and rear wheel braking distribution control on front and rear wheels of one of left and right sides if an absolute value of a wheel deceleration of the front wheel is equal to or larger than a first threshold and an absolute value of a wheel deceleration of the rear wheel is equal to or larger than a second threshold.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: March 24, 2020
    Assignee: AUTOLIV NISSIN BRAKE SYSTEMS JAPAN CO., LTD.
    Inventor: Keisuke Wakizaka
  • Patent number: 10597019
    Abstract: A vehicle control apparatus is provided with: a controller (i) configured to set first brake fluid pressure associated with wheels on one of left and right sides out of a plurality of wheels to be higher than second brake fluid pressure associated with wheels on the other side in order to turn a vehicle in one direction, and configured (ii) to then increase the second brake fluid pressure by using a fluid pressure difference between the first brake fluid pressure and the second brake fluid pressure, and (iii) to set the first brake fluid pressure to be lower than the second brake fluid pressure while holding the second brake fluid pressure in order to turn the vehicle in another direction, which is different from the one direction.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: March 24, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hironori Ito, Akira Nagae, Ryo Inomata, Masayuki Ikeda
  • Patent number: 10576952
    Abstract: Provided is an electric brake system capable of compensating for a braking force by the whole electric brake system when functional degradation occurs in a part of the system.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: March 3, 2020
    Assignee: NTN CORPORATION
    Inventor: Yui Masuda
  • Patent number: 9720024
    Abstract: A sensor circuit includes at least one signal processing circuit connectable to at least one sensor operable on a channel and configured to receive and process a periodic sensor signal therefrom the sensor circuit further includes a switching device coupled between the signal processing circuit and the at least one sensor, at least one switch coupled to the switching device and a controller connected to the at least one switch and to an output of the signal processing circuit. The controller is operable to re-configure the switching device via control of the switch and determine whether a short condition exists on the at least one sensor or channel based on the output from the signal processing circuit.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: August 1, 2017
    Assignee: NXP USA, Inc.
    Inventors: Benoit Alcouffe, Sebastien Abaziou
  • Patent number: 9050953
    Abstract: A method for determining the vehicle linear velocity of a vehicle having all-wheel drive, and which is equipped with a central lock and a vehicle controller to implement an ABS or ASR control. The vehicle linear velocity is able to be determined if a braking-pressure difference is adjusted at the wheels of an axle, and, in the case of an ABS control, the vehicle linear velocity is determined from the rotational speed of the wheel having the higher speed, and from the slip of this wheel, and, in the case of an ASR control, it is determined from the rotational speed of the wheel having the lower speed, and from the slip of this wheel.
    Type: Grant
    Filed: August 11, 2008
    Date of Patent: June 9, 2015
    Assignee: ROBERT BOSCH GMBH
    Inventor: Stefan Kueperkoch
  • Patent number: 9010878
    Abstract: A brake apparatus that can achieve front-rear distribution in accordance with a traveling environment variation. At an intermediate point from a start point of a second mode, first interval to an end point of a second mode, second interval, the increasing rate of braking force for a front wheel with respect to an operation amount is changed. The increasing rate of the operation amount prior to the intermediate point can be represented by a first inclination of a curve while the increasing rate of the operation amount after the intermediate point is represented by a second inclination of the curve. The first inclination is less than the second inclination. Setting the increasing rate after an intermediate point to be higher than the increasing rate before the intermediate point, the vehicle body generation deceleration can be caused to increase in a linear proportion to the operation amount.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: April 21, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kazuya Takenouchi, Yoshiaki Sawano, Shuichi Fukaya
  • Patent number: 8950826
    Abstract: A brake system and a method for operating same for a vehicle having a first wheel brake cylinder, into which a first brake medium volume is displaceable from a master brake cylinder, a second wheel brake cylinder, into which a second brake medium volume is displaceable from the master brake cylinder, a first pump associated with the first wheel brake cylinder and a second pump associated with the second wheel brake cylinder, the brake system including a block valve coupled to the brake medium reservoir, the first pump being able to pump a third brake medium volume through the at least partially open block valve and a first non-return valve into the first wheel brake cylinder, and the second pump being able to pump a fourth brake medium volume through an at least partially open block valve and the second non-return valve into the second wheel brake cylinder.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: February 10, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Michael Kunz, Stefan Strengert
  • Patent number: 8915554
    Abstract: A vehicle brake fluid pressure control apparatus controls operations of a fluid pressure adjusting unit capable of performing adjustment of individually increasing and decreasing brake fluid pressures acting respectively on wheel brakes for front wheels and wheel brakes for rear wheels to be within allowable differential pressures allowable between the brake fluid pressures of the wheel brakes for the left and right coaxial front wheels and the left and right coaxial rear wheels. In the apparatus, estimated vehicle body deceleration calculator calculates an estimated vehicle body deceleration of a vehicle and allowable differential pressure setting device sets the allowable differential pressures matching a road surface friction coefficient based on the estimated vehicle body deceleration calculated by the estimated vehicle body deceleration calculator. This enables accurate judgment of a road surface having a high friction coefficient and setting of sufficiently large allowable differential pressures.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: December 23, 2014
    Assignee: Nissin Kogyo Co., Ltd.
    Inventor: Tomoaki Sekiya
  • Patent number: 8910760
    Abstract: In a brake system for a vehicle, a first control mode and a second control mode are provided by which it is possible to cope with variations in the running environments such as changes between traveling on a public road and traveling on a circuit racecourse and variations in road conditions such as changes between a dry road surface and a wet road surface. A mode change-over switch is disposed between a kill switch on the upper side and a starter switch on the lower side, on the vehicle body center side relative to a right grip. Switching between the first control mode and the second control mode is carried out by use of the mode change-over switch.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: December 16, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kazuya Takenouchi, Shuichi Fukaya, Tetsuya Kudo, Fuyuki Hosokawa
  • 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: 8862355
    Abstract: Systems and methods are provided for restarting an engine that can be selectively deactivated during idle-stop conditions. In one embodiment, current is directed to a starter motor and an electric brake sequentially by limiting the current supplied to one while current is supplied to the other, an order of delivering the current based on a timing of a restart request relative to an electric brake request, as well as vehicle operating conditions at the time the requests were received. By coordinating the operation of a starter motor with the operation of an electric brake, loading of the engine system's electrical supply can be reduced.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: October 14, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Alex O'Connor Gibson, Chad Everette Griffin, Felix Nedorezov
  • Patent number: 8781701
    Abstract: In a vehicular brake-by-wire braking system, during a four wheel simultaneous control mode when regeneration cooperative braking is implemented, a pair of electromagnetic isolation control valves and one of normally closed electromagnetic pressure relief valves corresponding to regeneration side left and right wheel brakes and normally closed electromagnetic pressure relief valves corresponding to non-regeneration side left and right wheel brakes are caused to operate to open and close, while the other of the normally closed electromagnetic pressure relief valves corresponding to the regeneration side left and right wheel brakes and the normally closed electromagnetic pressure relief valves corresponding to the non-regeneration side left and right wheel brakes are put in de-energized states in which the valves concerned are kept closed, and all normally open electromagnetic pressure supply valves are put in de-energized states in which the valves concerned are kept opened.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: July 15, 2014
    Assignees: Honda Motor Co., Ltd., Nissin Kogyo Co., Ltd.
    Inventors: Yasushi Aoki, Jiro Suzuki, Kouji Sakai
  • Publication number: 20140159476
    Abstract: A method for automatically decelerating a vehicle having a first side with a first front wheel brake and a first rear wheel brake and second side with a second front wheel brake and a second rear wheel brake, and in which the vehicle further has a braking system with a pump operable to deliver a flow of pressurized hydraulic fluid to the first and second front wheel brakes and to the first and second rear wheel brakes, includes receiving a signal associated with an emergency braking event. The method further includes increasing the hydraulic pressure at the first and second front wheel brakes at a greater rate than at the first and second rear wheel brakes. The method also includes directing hydraulic fluid from the first front wheel brake to the second rear wheel brake upon achieving a targeted level of deceleration or wheel slip.
    Type: Application
    Filed: March 15, 2013
    Publication date: June 12, 2014
    Applicant: ROBERT BOSCH GMBH
    Inventors: Gregory Griffin, Daniel Kwiatkowski, Joseph Miller
  • Patent number: 8659606
    Abstract: A computer-implemented method includes identifying a representation of a feature of an animated character by inverting a skinned representation of the feature in one position. The inversion includes a non-linear inversion of the skinned representation of the feature. The method also includes skinning the identified feature representation to produce the animated character in another position.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: February 25, 2014
    Assignee: LucasFilm Entertainment Company Ltd.
    Inventors: Frederic P. Pighin, Cary Phillips
  • Patent number: 8556353
    Abstract: In response to depression of a brake pedal (6), an electric brake (5) mounted on the rear side starts to generate a braking force at the time of stroke h1 before a fluid pressure brake (4) mounted on the front side starts to generate a braking force when the stroke reaches stroke h2. Accordingly, the rear side is able to generate a braking force prior to the front side, whereby it is possible to reduce a rigid feeling, and therefore improve the pedal feeling.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: October 15, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Hideaki Ishii, Kazumoto Sano, Kunihiro Matsunaga, Masaru Sakuma
  • Patent number: 8491064
    Abstract: A method for braking a vehicle is provided, wherein the vehicle includes a circuit adapted for transmitting a brake signal from an operator controlled braking element to brake devices arranged at a plurality of the vehicle's ground engaging elements via a brake fluid. The method includes detecting a fluid pressure in the circuit, using the detected fluid pressure level as an input for determining a brake power for at least one auxiliary brake in the vehicle, and controlling the auxiliary brake responsively.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: July 23, 2013
    Assignee: Volvo Construction Equipment AB
    Inventor: Mikael Petersson
  • Patent number: 8419138
    Abstract: The invention relates to a technology for effecting electronic brake force distribution in a vehicle brake system, which is equipped with a hydraulic brake boosting, comprising detecting a state requiring an electronic brake boosting and a limiting of the brake pressure generation of the hydraulic brake boosting according to the electronic brake boosting.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: April 16, 2013
    Assignee: Lucas Automotive GmbH
    Inventor: Josef Knechtges
  • Publication number: 20130076116
    Abstract: A vehicle brake fluid pressure control apparatus controls operations of a fluid pressure adjusting unit capable of performing adjustment of individually increasing and decreasing brake fluid pressures acting respectively on wheel brakes for front wheels and wheel brakes for rear wheels to be within allowable differential pressures allowable between the brake fluid pressures of the wheel brakes for the left and right coaxial front wheels and the left and right coaxial rear wheels. In the apparatus, estimated vehicle body deceleration calculator calculates an estimated vehicle body deceleration of a vehicle and allowable differential pressure setting device sets the allowable differential pressures matching a road surface friction coefficient based on the estimated vehicle body deceleration calculated by the estimated vehicle body deceleration calculator. This enables accurate judgment of a road surface having a high friction coefficient and setting of sufficiently large allowable differential pressures.
    Type: Application
    Filed: September 26, 2012
    Publication date: March 28, 2013
    Applicant: NISSIN KOGYO CO., LTD.
    Inventor: NISSIN KOGYO CO., LTD.
  • Patent number: 8405664
    Abstract: A computer-implemented method includes identifying a representation of a feature of an animated character by inverting an skinned representation of the feature in one position. The inversion includes a non-linear inversion of the skinned representation of the feature. The method also includes skinning the identified feature representation to produce the animated character in another position.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: March 26, 2013
    Assignee: Lucasfilm Entertainment Company Ltd.
    Inventors: Frederic P. Pighin, Cary Phillips
  • Patent number: 8392086
    Abstract: A brake fluid pressure controlling device is provided that controls a brake actuator to adjust brake fluid pressure in a wheel cylinder provided to correspond to a wheel. The brake actuator includes a passage for supplying the brake fluid to the wheel cylinder, a pump that discharges the brake fluid to the passage, and an electromagnetic valve that is located in the passage and adjusts the pressure of the brake fluid flowing into the wheel cylinder. The device includes a discharge rate detecting section, a signal generating section, a noise generating section, a noise overlaying section, and an electromagnetic valve controlling section. The discharge rate detecting section detects the discharge rate of the brake fluid discharged by the pump. The signal generating section generates a command signal for controlling the electromagnetic valve. The noise generating section generates noise, the noise being an AC signal corresponding to the detected discharge rate.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: March 5, 2013
    Assignee: Advics Co., Ltd.
    Inventors: Masahiko Taniguchi, Masanobu Fukami
  • Patent number: 8332103
    Abstract: Systems and methods for auto-location of tire pressure monitoring sensor units on a vehicle measure the angle of a wheel at two different times using a rim mounted or a tire mounted sensor and determines a difference in measured angles. The systems and methods provide for transmitting the angles and/or the difference in the measured angles along with a sensor identification to an electronic control module. Alternatively, the systems and methods provide for transmitting time differences to the electronic control module. The electronic control module correlates information transmitted from the wheel unit with antilock brake system data. A location of the wheel mounting the sensor is determined and the sensor identification is assigned.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: December 11, 2012
    Assignee: Schrader Electronics Ltd.
    Inventors: John Greer, Paul McGrotty, Samuel Strahan
  • Patent number: 8272699
    Abstract: A brake apparatus is provided that can make a ratio between a front wheel braking force and a rear wheel braking force that is actually generated into an arbitrary ratio.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: September 25, 2012
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Shinya Imura, Kenichiro Matsubara, Hirotaka Oikawa
  • Patent number: 8210620
    Abstract: According to the braking force control system of the present invention it is prevented that the braking root pressure is increased unnecessarily high when the braking force increase suppressing control was initiated during the execution of the brake assist control without losing the effects of increasing the braking force available when the brake assist control only is executed.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: July 3, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Yasuji Mizutani
  • Patent number: 8152244
    Abstract: During a non-control mode, a separation valve is closed, and thus separates a first supply path that supplies working fluid to at least one of wheel cylinders and a second supply path that supplies working fluid to at least one of the other wheel cylinders, from each other. An on-off valve provided on the first supply path is kept closed despite a valve opening command, due to the effect of the differential pressure between the outlet and inlet openings of the valve if the differential pressure is above a predetermined value while the valve is closed. When occurrence of a closure failure on the separation valve is assumed during braking, a brake ECU stops the control performed by a wheel cylinder pressure control system, and shifts to a backup non-control mode, and controls the discharge of working fluid from the first supply path-side wheel cylinders so that the on-off valve is opened in accordance with the valve opening command. Thus, the confinement of the wheel cylinder pressure is prevented.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: April 10, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kohei Yanai, Eiji Nakamura
  • Patent number: 8029072
    Abstract: In order to achieve a good brake feeling, a brake control system includes a master cylinder which discharges pressurized operating fluid according to an operating amount of a brake operating member by a driver, a stroke simulator which is connected to the master cylinder and creates a reaction force with respect to that operation according to the operating amount of the brake operating member, and a control portion which calculates a target deceleration using hydraulic pressure in the stroke simulator. The brake control system is also provided with a master cylinder pressure sensor that measures the hydraulic pressure in the master cylinder. The control portion may also calculate the target deceleration using an estimated value of the hydraulic pressure in the stroke simulator calculated based on the measured value from the master cylinder pressure sensor.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: October 4, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tetsuya Miyazaki, Yoshiaki Irie, Rio Suda
  • Patent number: 7681959
    Abstract: A brake pressure distribution between axles is regulated as a function of a difference in wheel rotational speeds between axles or wheel slip values between axles at the axles. Exceeding a predefined limit value in difference in the wheel rotational speed between axles or the wheel slip values between axles during braking serves to regulate the distribution. On the basis of the dependency between at least the brake pressure at the rear axle and the vehicle deceleration after at least two preceding service braking operations, a critical deceleration value is determined.
    Type: Grant
    Filed: February 3, 2009
    Date of Patent: March 23, 2010
    Assignee: Knorr-Bremse Systeme fuer Nutzfahrzeuge GmbH
    Inventor: Michael Herges
  • Patent number: 7661773
    Abstract: A method of braking force distribution and a braking force control system for a vehicle provide a proper control on distribution between braking force between front wheels and rear wheels by controlling braking force on a rear right wheel and a rear left wheel such that an actual wheel speed of each rear wheel follows a target wheel speed thereof. The method includes the steps of calculating a current target wheel speed of each rear wheel to be used based on an actual deceleration speed of at least one of the front wheels and a previous target wheel speed of each rear wheel; and controlling braking force on each of the rear wheels based on the thus calculated current target wheel speed.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: February 16, 2010
    Assignees: Nissin Kogyo Co., Ltd., Honda Motor Co., Ltd.
    Inventors: Tetsuhiro Narita, Susumu Takahashi, Takeshi Kojima
  • Patent number: 7356401
    Abstract: A drivetrain protection and management system (DPMS) monitors and determines individual wheel speeds to detect wheel spin and slip conditions on a drive axle. Wheel spin is caused by low surface friction, excessive input torque, lack of inter-axle differential and differential locks, excessive operating temperatures, or poor driving techniques. When wheel spin or slip exceeds a threshold, the DPMS automatically controls input torque to the drive axle by controlling engine or retarder torque. In addition to monitoring wheel speeds, the DPMS monitors other vehicle characteristics such as engine torque/speed, transmission ratio, transmission output speed, vehicle speed, throttle position, for example. The DPMS monitors and stores these vehicle characteristics over time and generates a data output that summarizes a history of vehicle operating conditions. The DPMS can communicate this data output real time during vehicle operation, which can be used by a fleet to maximize vehicle performance.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: April 8, 2008
    Assignee: ArvinMeritor Technology, LLC
    Inventors: Richard A. Romer, Robert S. Harrison
  • Patent number: 7347508
    Abstract: A combined brake system and method, for a two-wheeled motor vehicle, is capable of synchronizing a braking operation of either a front or rear wheel with a braking operation of the other wheel. The brake system enables a rider to perform braking operations in which the rider feels no little or no discomfort. The system includes a pair of hydraulic pressure modulators for supplying hydraulic pressure, generated by an electrically-operated actuator, to front and rear brake calipers, respectively. A controller electrically controls each hydraulic pressure modulator in response to a riding condition for the vehicle and in response to a braking operation applied by the vehicle operator.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: March 25, 2008
    Assignee: Honda Motor Co., Ltd.
    Inventors: Masanobu Nakayama, Kazuhiko Tani, Yukimasa Nishimoto, Hideo Takahashi
  • Publication number: 20080041135
    Abstract: The present invention reduces a control processing load of a vehicle-use antilock brake system attributed to a trouble diagnosis of a sensor which is mounted on a vehicle and has an output thereof changed corresponding to a traveling state of the vehicle during traveling of the vehicle, particularly a vehicle body acceleration sensor which detects the vehicle body acceleration of the vehicle. From a point of time that a vehicle speed becomes a preset speed ? (4 m/s) or more (timing indicated by symbol T1), the storing and the updating of a maximum value Gmax and a minimum value Gmin of an output value of the vehicle body acceleration sensor 1 are started and it is determined whether the difference between the maximum value Gmax and the minimum value Gmin, that is, a fluctuation width of the output value of the vehicle body acceleration sensor 1 becomes a preset fluctuation width ? or more or not.
    Type: Application
    Filed: December 27, 2004
    Publication date: February 21, 2008
    Applicant: BOSCH CORPORATION
    Inventor: Takayuki Okai
  • Patent number: 7322660
    Abstract: A method for electronically regulating brake force distribution to the front axle and the rear axle of a motor vehicle (EBV control), wherein the rotational behavior of the vehicle wheels is determined, compared with the vehicle speed or vehicle reference speed and/or with the changes of these variables, and evaluated to limit the slip on the rear-wheel brakes by modulating the braking pressure. The brake force distribution is controlled in dependence on the sum signals obtained by addition of acceleration values determined on each individual rear wheel and/or by addition of slip values determined on each individual rear wheel. It is particularly arranged for to weight the sum signals with variable sum factors and evaluate them as a criterion for triggering the EBV control (so-called EBV plus control).
    Type: Grant
    Filed: September 4, 2003
    Date of Patent: January 29, 2008
    Assignee: Continental Teves AG & Co. OhG
    Inventors: Ivica Batistic, Holger Schmidt
  • Publication number: 20070262638
    Abstract: In the reverse braking control of the vehicle, a master cylinder pressure Pmc generated according to the driver's pressing force of a brake pedal is pressurized by pumps and is supplied as a wheel cylinder pressure of rear wheels. The pressurized master cylinder pressure Pmc is reduced by the on-off control of pressure reducing solenoid valves and is supplied as a wheel cylinder pressure of front wheels. This ensures application of the braking force to the front wheels and the rear wheels at a front-rear ratio having a greater rear wheel fraction than the front-rear ratio during the forward braking control. A greater braking force is thus applied to the rear wheels, which are located at the front in the moving direction of the reverse braking control. This ensures generation of a sufficient braking force and effectively prevents the lock of the front wheels.
    Type: Application
    Filed: May 2, 2007
    Publication date: November 15, 2007
    Inventors: Shinya Kodama, Mitsuhiro Tabata, Michihito Shimada, Hiroshi Sato
  • Patent number: 7275795
    Abstract: A hybrid system for a vehicle which can ensure a braking stability on a slippery road is provided. Therefore, the system is provided with a motor 2 a rotation force of which is transmitted to a rear wheel 7, braking actuators 57, 67 which brake the front wheel 6 and the rear wheel 7, and proportional valves 53, 63 controlling a braking force introduced into each braking actuator 57, 67. A control unit 20 is so provided that the control unit 20 calculates a required braking energy based upon a vehicle operating condition in demanding a braking and operates the motor 2 as a power generator to generate a power so as to produce the calculated braking energy, as well as controls a braking force of the front wheel 6.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: October 2, 2007
    Assignee: Nissan Diesel Motor Co., Ltd.
    Inventors: Mitsuhiro Nishina, Yuuji Suzuki, Tatsuji Miyata
  • Publication number: 20070188021
    Abstract: A control portion stores an actual brake force distribution characteristic line indicating relation between a front brake force allocated to the front wheel and a rear brake force allocated to the rear wheel, wherein the actual brake force distribution characteristic line is determined based on an ideal brake force distribution characteristic line so that, in achieving a given deceleration, a ratio of the front brake force to the rear brake force becomes smaller in the case that the distribution is calculated by using the actual brake force distribution characteristic line than in the case that the distribution is calculated by using the ideal brake force distribution characteristic line. The control portion calculates the distribution by using the actual brake force distribution characteristic line and determines, based on the calculated distribution, the wheel cylinder pressures to be generated at the front wheel cylinder the rear wheel cylinder.
    Type: Application
    Filed: February 1, 2007
    Publication date: August 16, 2007
    Applicant: ADVICS CO., LTD.
    Inventors: Kazuya Maki, Yasuo Takahara
  • Patent number: 7185957
    Abstract: A braking force distribution apparatus for a vehicle includes pressure sensors for detecting the internal pressures of the tires, and wheel speed sensors for detecting the angular speeds of the wheels. The apparatus obtains a dynamic load radius change rate of each tire which corresponds to the deviation of the internal pressure of the tire from a reference pressure, obtains a wheel speed for calculation of a slip value on the basis of the angular speed of the tire and the change rate, and obtains a slip value on the basis of the obtained wheel speed. As a result, EBD control is started at proper timing in accordance with the slip value.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: March 6, 2007
    Assignee: Advics Co., Ltd.
    Inventor: Masahiro Matsuura
  • Patent number: 7156472
    Abstract: A brake control apparatus having a brake pressure controlling unit including normally-open-type electromagnetic valves for preventing a fluid pressure transmitted from a master cylinder to wheel brakes when the valves close and a control unit executing an anti-lock brake control resolving a lock tendency of the wheels by controlling the operation of the brake pressure controlling unit according to a result of judgment of the lock tendency of wheels, and simultaneously executing a brake force distribution control distributing front and rear brake forces by controlling the normally-open-type electromagnetic valves in correspondence with rear wheels to close in such a manner that the normally-open-type electromagnetic valves are opened when the brake force distribution control is finished, wherein the control unit finishes the brake force distribution control after a vehicle stops and a load applied ahead of the vehicle is released.
    Type: Grant
    Filed: January 14, 2004
    Date of Patent: January 2, 2007
    Assignee: Nissin Kogyo Co., Ltd.
    Inventor: Hiroaki Matsumoto
  • Patent number: 7097262
    Abstract: In braking force control apparatus and method for an automotive vehicle, a front-and-rear road wheel braking force distribution determining section determinatively distributes a front-and-rear road wheel braking force at a front-and-rear road wheel braking force distribution toward front and rear road wheel sides of the vehicle in accordance with a vehicular turning state to achieve the target deceleration and the vehicular deceleration developing section develops the target deceleration on the basis of the front-and-rear road wheel braking force distribution determined by the front-and-rear road wheel braking force distribution determining section.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: August 29, 2006
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Hiroki Sasaki
  • Patent number: 7076357
    Abstract: A braking control device of a vehicle starts executing braking force distribution (BFD) biased to front wheels for avoiding the locking of rear wheels prior to the front wheel at appropriate time by reducing errors of a judgment of the starting of the control. Usually, the BFD control is started in response to the increase of a master cylinder pressure, assuming that the rear wheel braking pressure is equally increased. When a fast braking action occurs, the delay of the pressure variation of the rear wheel braking pressure relative to the master cylinder is conspicuous because the responsibility of a master cylinder pressure to the braking action is too fast.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: July 11, 2006
    Assignees: Toyota Jidosha Kabushiki Kaisha, Advics Co. LTD
    Inventors: Chiaki Hamada, Akifumi Doura
  • Patent number: 7047121
    Abstract: An antiskid control system for a four-wheel-drive vehicle is arranged to calculate a difference between an average of wheel accelerations of front wheels and an average of wheel acceleration of rear wheels. When the difference is greater than or equal to the vibration determination threshold, the antiskid control system determines that a driveline vibration is generated and executes a control for converging the driveline vibration.
    Type: Grant
    Filed: June 27, 2005
    Date of Patent: May 16, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Gen Inoue, Atsushi Ishikawa, Nobuyuki Ohtsu
  • Patent number: 6988779
    Abstract: In a hybrid vehicle, an engine is connected to front wheels through a first motor/generator and a transmission, and a second motor/generator is connected to rear wheels. The first and second motors/generators are connected to a battery so that they are driven or regenerated. During regenerative braking of the vehicle, the distribution ratio of regenerative braking forces to the first and second motors/generators is controlled to become an ideal distribution ratio corresponding to a longitudinal acceleration (deceleration) of the vehicle, whereby the distribution ratio of the braking forces to the front and rear wheels can be always maintained at an optimal value during rapid deceleration as well as during slow deceleration of the vehicle, to improve the braking performance.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: January 24, 2006
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hirokatsu Amanuma, Tetsu Sugiyama, Shuji Oshida
  • Patent number: 6984005
    Abstract: An improved braking method and system for a vehicle equipped with an anti-lock brake system (ABS), a traction control or anti-slip regulation system (ASR) and one or more additional systems capable of effecting automatic braking of the vehicle independently of driver control, e.g., an adaptive cruise control system (ACC) or a rollover stability control system (RSC). Automatic braking takes place by admission of brake pressure to the drive axle. To detect a simultaneous braking demand of the driver, the wheel speeds of the non-driven axle or axles are compared with the wheel speeds of the drive axle or axles. If the wheel speeds of the non-driven axle(s) are less than the wheel speeds of the drive axle(s), or less than a vehicle reference speed, the brake pressure injected in response to driver demand is also fed to the brake cylinders of the wheels of the drive axle(s).
    Type: Grant
    Filed: July 14, 2003
    Date of Patent: January 10, 2006
    Assignee: WABCO GmbH & Co. oHG
    Inventors: Benno Meyer, Marcel Schlottmann, Immanuel Henken, Thomas Lenz, Tobias Munko, Gerhard Ruhnau
  • Patent number: 6953230
    Abstract: The performance of a system for controlling vehicle-movement dynamics, which operates the braking system and the drive train of a vehicle in order to prevent lateral breakaway of the vehicle, is improved yet further for the case in which oversteering of the vehicle is to be compensated. To this end it is proposed, according to the invention, that a braking moment be produced on the front wheel on the outside of the bend by the braking system, and an additional drive moment be built up by the drive train on the driven wheels.
    Type: Grant
    Filed: January 8, 2004
    Date of Patent: October 11, 2005
    Assignee: Lucas Automotive GmbH
    Inventors: Frank Einig, Elmar Hoffmann, Josef Knechtges, Michael Bleser
  • Patent number: 6928356
    Abstract: An antiskid control system for a four-wheel-drive vehicle is arranged to calculate a difference between an average of wheel accelerations of front wheels and an average of wheel acceleration of rear wheels. When the difference is greater than or equal to the vibration determination threshold, the antiskid control system determines that a driveline vibration is generated and executes a control for converging the driveline vibration.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: August 9, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Gen Inoue, Atsushi Ishikawa, Nobuyuki Ohtsu
  • Patent number: 6923512
    Abstract: An arrangement for ensuring the functioning of a brake configuration for a vehicle with a multiplicity of wheels which are arranged on a front axle and at least one rear axle and which support the vehicle. The brake configuration incorporates at least two brake devices, each to act upon one of the wheels, and a brake control with which the brake devices can be activated with a total brake action. A memory stores at least one value of a parameter for the brake devices. The parameter relates to at least one previous braking operation performed by the respective brake device. A control unit distributes the brake action to the brake devices, taking into account the value of the parameter of the respective brake devices when the brake control is actuated. The brake devices are disc brakes.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: August 2, 2005
    Assignee: Scania CV AB (publ)
    Inventors: Håkan Andersson, Nils-Gunnar Vågstedt
  • Patent number: 6918638
    Abstract: A vehicle stabilizing device for setting or modifying brake pressures in the wheel brakes of a braking system with diagonally divided braking circuits. To improve a stabilization of the vehicle in the case of understeering by an additional delay, a device for determining a understeering drive condition, a controller for calculating a desired speed or deceleration, and derived therefrom a deceleration braking force in accordance with the understeering drive condition, a braking force control which in the wheel brakes of the front axle sets a differential braking force between the wheel brakes, which corrects the understeering drive condition, in accordance with the deceleration control braking force are provided.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: July 19, 2005
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Markus Schneider, Fikri El Guenaoui