Front-rear Axle Apportioning Or Speed Difference Patents (Class 303/186)
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Patent number: 12097836Abstract: A brake system in a motor vehicle, the friction brake system of which, on the front and rear wheels, each case including vehicle wheel brakes which can be actuated via an electronic control device which includes an axle-specific braking force distributor unit by which a front axle target deceleration and a rear axle target deceleration can be determined from a friction brake system target deceleration, and which includes a wheel-specific braking force distributor unit by which front wheel target decelerations can be determined from the front axle target deceleration, and rear wheel target decelerations can be determined from the rear axle target deceleration, on the basis of which the wheel-specific braking force distributor unit generates control signals for the actuation of the vehicle wheel brakes.Type: GrantFiled: May 13, 2020Date of Patent: September 24, 2024Assignee: AUDI AGInventor: Ulrich Treffer
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Patent number: 11993239Abstract: An electric brake including: a brake mechanism configured to transmit a thrust force generated through drive of an electric motor to a piston, the piston being configured to move brake pads to be pressed against a disc rotor; a thrust force sensor configured to detect the thrust force transmitted to the piston; and an ECU for rear electric brake configured to control, based on a detection value obtained by the thrust force sensor, the drive of the electric motor in accordance with a brake command. The ECU for rear electric brake is configured to learn, as a reference point of a piston thrust force, a detection value obtained by the thrust force sensor when the electric motor is driven to move the piston in a direction for pressing the piston against the disc rotor in a range in which the brake pads are not in contact with the disc rotor.Type: GrantFiled: September 17, 2019Date of Patent: May 28, 2024Assignee: HITACHI ASTEMO, LTD.Inventor: Daisuke Goto
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Patent number: 11440519Abstract: 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: GrantFiled: November 2, 2017Date of Patent: September 13, 2022Assignees: Blubrake s.r.l., Politecnico di MilanoInventors: Matteo Corno, Giulio Panzani, Sergio Matteo Savaresi, Fabio Todeschini, Luca D'Avico, Simone Fiorenti, Alessio Nicolò Cota
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Patent number: 11097736Abstract: 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: GrantFiled: February 26, 2018Date of Patent: August 24, 2021Assignee: CLEARPATH ROBOTICS INC.Inventors: Ryan Christopher Gariepy, Shahab Kaynama
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Patent number: 11027710Abstract: 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: GrantFiled: April 3, 2017Date of Patent: June 8, 2021Assignee: WABCO EUROPE BVBAInventor: Karsten Breuer
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Patent number: 10814853Abstract: 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: GrantFiled: January 24, 2019Date of Patent: October 27, 2020Assignee: ZF Active Safety US Inc.Inventor: Blaise Ganzel
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Patent number: 10800388Abstract: 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: GrantFiled: February 20, 2017Date of Patent: October 13, 2020Assignee: Continental Teves AG & Co. oHGInventors: Marco Besier, Georg Roll, Sascha Gröger, Andreas Neu, Cristiano Hoffmann
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Patent number: 10597019Abstract: 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: GrantFiled: July 12, 2017Date of Patent: March 24, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hironori Ito, Akira Nagae, Ryo Inomata, Masayuki Ikeda
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Patent number: 10597012Abstract: 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: GrantFiled: March 28, 2017Date of Patent: March 24, 2020Assignee: AUTOLIV NISSIN BRAKE SYSTEMS JAPAN CO., LTD.Inventor: Keisuke Wakizaka
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Patent number: 10576952Abstract: 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: GrantFiled: March 13, 2017Date of Patent: March 3, 2020Assignee: NTN CORPORATIONInventor: Yui Masuda
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Patent number: 9720024Abstract: 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: GrantFiled: May 4, 2015Date of Patent: August 1, 2017Assignee: NXP USA, Inc.Inventors: Benoit Alcouffe, Sebastien Abaziou
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Patent number: 9050953Abstract: 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: GrantFiled: August 11, 2008Date of Patent: June 9, 2015Assignee: ROBERT BOSCH GMBHInventor: Stefan Kueperkoch
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Patent number: 9010878Abstract: 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: GrantFiled: February 8, 2012Date of Patent: April 21, 2015Assignee: Honda Motor Co., Ltd.Inventors: Kazuya Takenouchi, Yoshiaki Sawano, Shuichi Fukaya
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Patent number: 8950826Abstract: 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: GrantFiled: January 11, 2011Date of Patent: February 10, 2015Assignee: Robert Bosch GmbHInventors: Michael Kunz, Stefan Strengert
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Patent number: 8915554Abstract: 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: GrantFiled: September 26, 2012Date of Patent: December 23, 2014Assignee: Nissin Kogyo Co., Ltd.Inventor: Tomoaki Sekiya
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Patent number: 8910760Abstract: 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: GrantFiled: February 10, 2012Date of Patent: December 16, 2014Assignee: Honda Motor Co., Ltd.Inventors: Kazuya Takenouchi, Shuichi Fukaya, Tetsuya Kudo, Fuyuki Hosokawa
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Patent number: 8897937Abstract: 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: GrantFiled: December 6, 2012Date of Patent: November 25, 2014Assignees: Kawasaki Jukogyo Kabushiki Kaisha, Mitsubishi Electric CorporationInventors: Hisanosuke Kawada, Soichiro Bando, Hideaki Ezaki, Isao Suzumura, Yuji Katsuyama, Yoshiaki Wakabayashi
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Patent number: 8862355Abstract: 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: GrantFiled: June 22, 2011Date of Patent: October 14, 2014Assignee: Ford Global Technologies, LLCInventors: Alex O'Connor Gibson, Chad Everette Griffin, Felix Nedorezov
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Patent number: 8781701Abstract: 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: GrantFiled: March 14, 2008Date of Patent: July 15, 2014Assignees: Honda Motor Co., Ltd., Nissin Kogyo Co., Ltd.Inventors: Yasushi Aoki, Jiro Suzuki, Kouji Sakai
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Publication number: 20140159476Abstract: 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: ApplicationFiled: March 15, 2013Publication date: June 12, 2014Applicant: ROBERT BOSCH GMBHInventors: Gregory Griffin, Daniel Kwiatkowski, Joseph Miller
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Patent number: 8659606Abstract: 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: GrantFiled: March 14, 2013Date of Patent: February 25, 2014Assignee: LucasFilm Entertainment Company Ltd.Inventors: Frederic P. Pighin, Cary Phillips
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Patent number: 8556353Abstract: 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: GrantFiled: February 25, 2009Date of Patent: October 15, 2013Assignee: Hitachi, Ltd.Inventors: Hideaki Ishii, Kazumoto Sano, Kunihiro Matsunaga, Masaru Sakuma
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Patent number: 8491064Abstract: 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: GrantFiled: January 22, 2008Date of Patent: July 23, 2013Assignee: Volvo Construction Equipment ABInventor: Mikael Petersson
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Patent number: 8419138Abstract: 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: GrantFiled: February 16, 2009Date of Patent: April 16, 2013Assignee: Lucas Automotive GmbHInventor: Josef Knechtges
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Publication number: 20130076116Abstract: 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: ApplicationFiled: September 26, 2012Publication date: March 28, 2013Applicant: NISSIN KOGYO CO., LTD.Inventor: NISSIN KOGYO CO., LTD.
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Patent number: 8405664Abstract: 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: GrantFiled: October 24, 2011Date of Patent: March 26, 2013Assignee: Lucasfilm Entertainment Company Ltd.Inventors: Frederic P. Pighin, Cary Phillips
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Patent number: 8392086Abstract: 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: GrantFiled: September 21, 2010Date of Patent: March 5, 2013Assignee: Advics Co., Ltd.Inventors: Masahiko Taniguchi, Masanobu Fukami
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Patent number: 8332103Abstract: 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: GrantFiled: September 22, 2010Date of Patent: December 11, 2012Assignee: Schrader Electronics Ltd.Inventors: John Greer, Paul McGrotty, Samuel Strahan
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Patent number: 8272699Abstract: 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: GrantFiled: August 14, 2009Date of Patent: September 25, 2012Assignee: Hitachi Automotive Systems, Ltd.Inventors: Shinya Imura, Kenichiro Matsubara, Hirotaka Oikawa
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Patent number: 8210620Abstract: 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: GrantFiled: June 29, 2005Date of Patent: July 3, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventor: Yasuji Mizutani
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Patent number: 8152244Abstract: 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: GrantFiled: September 26, 2007Date of Patent: April 10, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kohei Yanai, Eiji Nakamura
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Patent number: 8029072Abstract: 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: GrantFiled: November 30, 2006Date of Patent: October 4, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tetsuya Miyazaki, Yoshiaki Irie, Rio Suda
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Patent number: 7681959Abstract: 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: GrantFiled: February 3, 2009Date of Patent: March 23, 2010Assignee: Knorr-Bremse Systeme fuer Nutzfahrzeuge GmbHInventor: Michael Herges
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Patent number: 7661773Abstract: 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: GrantFiled: July 26, 2006Date of Patent: February 16, 2010Assignees: Nissin Kogyo Co., Ltd., Honda Motor Co., Ltd.Inventors: Tetsuhiro Narita, Susumu Takahashi, Takeshi Kojima
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Patent number: 7356401Abstract: 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: GrantFiled: August 13, 2004Date of Patent: April 8, 2008Assignee: ArvinMeritor Technology, LLCInventors: Richard A. Romer, Robert S. Harrison
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Patent number: 7347508Abstract: 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: GrantFiled: June 3, 2005Date of Patent: March 25, 2008Assignee: Honda Motor Co., Ltd.Inventors: Masanobu Nakayama, Kazuhiko Tani, Yukimasa Nishimoto, Hideo Takahashi
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Publication number: 20080041135Abstract: 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: ApplicationFiled: December 27, 2004Publication date: February 21, 2008Applicant: BOSCH CORPORATIONInventor: Takayuki Okai
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Patent number: 7322660Abstract: 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: GrantFiled: September 4, 2003Date of Patent: January 29, 2008Assignee: Continental Teves AG & Co. OhGInventors: Ivica Batistic, Holger Schmidt
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Publication number: 20070262638Abstract: 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: ApplicationFiled: May 2, 2007Publication date: November 15, 2007Inventors: Shinya Kodama, Mitsuhiro Tabata, Michihito Shimada, Hiroshi Sato
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Patent number: 7275795Abstract: 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: GrantFiled: March 20, 2003Date of Patent: October 2, 2007Assignee: Nissan Diesel Motor Co., Ltd.Inventors: Mitsuhiro Nishina, Yuuji Suzuki, Tatsuji Miyata
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Publication number: 20070188021Abstract: 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: ApplicationFiled: February 1, 2007Publication date: August 16, 2007Applicant: ADVICS CO., LTD.Inventors: Kazuya Maki, Yasuo Takahara
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Patent number: 7185957Abstract: 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: GrantFiled: February 10, 2005Date of Patent: March 6, 2007Assignee: Advics Co., Ltd.Inventor: Masahiro Matsuura
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Patent number: 7156472Abstract: 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: GrantFiled: January 14, 2004Date of Patent: January 2, 2007Assignee: Nissin Kogyo Co., Ltd.Inventor: Hiroaki Matsumoto
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Patent number: 7097262Abstract: 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: GrantFiled: April 29, 2004Date of Patent: August 29, 2006Assignee: Nissan Motor Co., Ltd.Inventor: Hiroki Sasaki
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Patent number: 7076357Abstract: 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: GrantFiled: April 2, 2004Date of Patent: July 11, 2006Assignees: Toyota Jidosha Kabushiki Kaisha, Advics Co. LTDInventors: Chiaki Hamada, Akifumi Doura
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Patent number: 7047121Abstract: 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: GrantFiled: June 27, 2005Date of Patent: May 16, 2006Assignee: Hitachi, Ltd.Inventors: Gen Inoue, Atsushi Ishikawa, Nobuyuki Ohtsu
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Patent number: 6988779Abstract: 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: GrantFiled: November 6, 2003Date of Patent: January 24, 2006Assignee: Honda Motor Co., Ltd.Inventors: Hirokatsu Amanuma, Tetsu Sugiyama, Shuji Oshida
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Patent number: 6984005Abstract: 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: GrantFiled: July 14, 2003Date of Patent: January 10, 2006Assignee: WABCO GmbH & Co. oHGInventors: Benno Meyer, Marcel Schlottmann, Immanuel Henken, Thomas Lenz, Tobias Munko, Gerhard Ruhnau
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Patent number: 6953230Abstract: 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: GrantFiled: January 8, 2004Date of Patent: October 11, 2005Assignee: Lucas Automotive GmbHInventors: Frank Einig, Elmar Hoffmann, Josef Knechtges, Michael Bleser
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Patent number: 6928356Abstract: 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: GrantFiled: August 2, 2002Date of Patent: August 9, 2005Assignee: Hitachi, Ltd.Inventors: Gen Inoue, Atsushi Ishikawa, Nobuyuki Ohtsu