Including Pneumatic Power Booster Patents (Class 303/114.3)
  • Patent number: 10435002
    Abstract: A vacuum system for the brake booster of a motor vehicle includes a demand-driven vacuum pump and a vacuum line connected on one end to the vacuum chamber of the brake booster and connected on another end to an intake port of the demand-driven vacuum pump. The vacuum system may include a discharge device arranged on an exhaust air opening of the vacuum system for ensuring bidirectional air volume flow between the external surroundings of the discharge device and the exhaust air opening of the vacuum system, which preventing liquids from reaching the exhaust air opening of the vacuum system as an air volume flows from the exterior surroundings into the exhaust air opening of the vacuum system. The vacuum system may also include a check valve arranged between the intake port of the demand-driven vacuum pump and the connection to a vacuum chamber of the brake booster.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: October 8, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: David Domkowski, Alexander Blobner
  • Patent number: 10322705
    Abstract: Methods and systems are provided for a pressure tapping device for a motor vehicle where a portion of the pressure energy generated at the fuel storage reservoir is transmitted to a working medium, physically separate from the fuel via the pressure tapping device. The pressure tapping device is fluidically coupled to a pressure actuator and enables the pressure operation via transmission of the pressure energy and adjustment of valves diverting flow from the fuel storage reservoir to the engine intake through the pressure tapping device.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: June 18, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Martin Wirth, Oliver Berkemeier
  • Patent number: 10246067
    Abstract: A method for operating a brake system for motor vehicles comprises in a normal control mode of the system, a displacement of a piston for a pressure supply device is terminated, and inlet valves of the wheel brakes are closed in the event of a specified brake condition. The normal control mode is switched to a special control mode in the event of a specified condition for the pressure supply device. In the event of the specified brake condition in the special control mode, a displacement of the piston of the pressure supply device is terminated by outputting an actuation signal to the pressure supply device, and for at least one selected wheel brake, the corresponding inlet valve is kept open and the corresponding outlet valve is opened at least temporarily while the inlet valves of the remaining wheel brakes are closed.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: April 2, 2019
    Assignee: CONTINENTAL TEVES AG & CO. OHG
    Inventor: Dieter Burkhard
  • Patent number: 10239506
    Abstract: A brake boost assist system for use with a master cylinder of a motor vehicle braking system, includes an inductive sensing system. The inductive sensing system has sensing devices carried on an input member and an output member, where the input and output members are coupled to respective ones of an input rod and an output rod of the brake boost assist system. Movement of the input and output members relative to one another, and relative to a fixed element of the inductive sensing system positioned within the brake boost assist system, enables an accurate estimation of the distance of a pedal gap which separates faces of the input and output rods. The accurate estimation of the pedal gap distance enables a more accurate determination to be made of the braking force required for any given pedal stroke input by an operator of the vehicle during a braking action.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: March 26, 2019
    Assignees: VEONEER NISSIN BRAKE SYSTEMS JAPAN CO., LTD., VEONEER US, INC.
    Inventors: Curt M. Roberts, Suat Ali Ozsoylu
  • Patent number: 10210676
    Abstract: A method, system, and apparatus to determine a malfunction or an abnormal pressure condition in a hydraulic system over a time period are provided. The method, system, and apparatus include monitoring hydraulic accumulator charge time, hydraulic accumulator discharge time, and hydraulic pump pressure over the time period, and determining whether the monitored hydraulic accumulator charge time, hydraulic accumulator discharge time, and hydraulic pump pressure are within respective predetermined ranges. A maintenance notification is output responsive to at least one of the monitored hydraulic accumulator charge time, hydraulic accumulator discharge time, and hydraulic pump pressure being outside the respective predetermined ranges during the time period.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: February 19, 2019
    Assignee: Caterpillar Inc.
    Inventors: Dale E. Milton, Ankitkumar P. Dhorajiya
  • Patent number: 10112587
    Abstract: A vehicle braking system includes a service brake pedal and a sensing device configured to monitor a position of the service brake pedal. A processing device is configured to control an amount of braking force provided by the vehicle braking system as a function of the position of the service brake pedal. The braking system further includes a return spring operatively coupled to the service brake pedal and configured to provide a substantially linear pedal effort feedback during an initial range of motion of the service brake pedal. Additionally, a damping device that operates in compression as the service brake pedal is depressed is configured to provide a substantially non-linear pedal effort feedback during a subsequent range of motion of the service brake pedal.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: October 30, 2018
    Assignee: HYSTER-YALE GROUP, INC.
    Inventors: Duane Richards, Rajdeep Dogra, Walter Goska, James Anderson
  • Patent number: 10093295
    Abstract: An electric brake system is disclosed. The electric brake system includes a master cylinder configured to discharge oil according to a pedal effort of a brake pedal, a simulation device provided with a simulator valve provided at a flow path connecting a simulation chamber, which is connected to the master cylinder to accommodate oil therein, to a first reservoir for storing oil therein so as to provide a reaction force according to the pedal effort of the brake pedal, and an inspection valve provided at a flow path connecting the first reservoir to the master cylinder or at a flow path connecting the master cylinder to the simulation device.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: October 9, 2018
    Assignee: MANDO CORPORATION
    Inventors: Hyun-Ho Kim, In-Wook Jeon
  • Patent number: 10065617
    Abstract: An apparatus and method for protecting an intact portion of a service brake system from a failed wheel end of a vehicle is provided. A failure in a wheel end is detected by determining an operation state of each of the wheel ends by monitoring parameters including the pressure in a parking brake air supply line. When it is determined that a failed wheel end is present in the service brake system, a service brake isolation valve is switched to a state in which the failed wheel end is isolated from the rest of the brake system. The service brake of the failed wheel end is disabled, while the service brakes of the other wheel ends are enabled for normal operation. The parking brake of the failed wheel end is enabled, while the parking brakes of the other wheel ends are disabled to prevent immobilization of the vehicle.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: September 4, 2018
    Assignee: Bendix Commercial Vehicle Systems LLC
    Inventors: Charles E Eberling, Fred W Hoffman, Ronald S Plantan
  • Patent number: 9994202
    Abstract: A method is described for operating a hydraulic braking device of a vehicle, in particular a motor vehicle, including at least one brake booster, which sets a brake boost as a function of a driver's braking command. It is provided that the driver's braking command is ascertained via a vacuum sensor assigned to a pneumatic brake booster and a hydraulic brake boost is set.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: June 12, 2018
    Assignee: ROBERT BOSCH GMBH
    Inventor: Stefan Epple
  • Patent number: 9964080
    Abstract: Methods and systems are provided for a throttle plate and a vacuum consumption device. In one example, a method may include providing vacuum to a vacuum consumption device with a venturi passage inside a throttle.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: May 8, 2018
    Assignee: Ford Global Technologies, LLC
    Inventor: Xiaogang Zhang
  • Patent number: 9945341
    Abstract: A negative pressure abnormality detection apparatus includes a negative pressure sensor to output a signal representing negative pressure in a negative pressure chamber of a brake booster into which intake negative pressure of an intake manifold generated by rotation of an engine is introduced; a negative pressure detection unit to detect the negative pressure based on the signal; an abnormality determination unit to determine whether an abnormality occurs with the negative pressure sensor, based on whether the negative pressure is shifted toward atmospheric or vacuum pressure relative to a threshold, when a state continues for a predetermined time or longer during which the engine rotates and a negative-pressure-expending braking operation is not performed; and a threshold change unit to change the threshold depending on opening of a throttle valve in an intake pipe connected with the intake manifold, while the state continues.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: April 17, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hirokazu Kato
  • Patent number: 9762122
    Abstract: A load drive controlling device includes a dulling controller, a dulling adjuster, and a Proportional Integral (PI) controller. The dulling adjuster sets a first electric current value for a dulling adjustment operation according to a change trend of a target electric current value in an inductive load. The dulling adjuster performs the dulling adjustment operation on the first electric current and limits a dulled value based on a guard value. The PI controller performs a PI control based on a deviation between the dulled value and an actual value of the electric current. The dulling controller sets the first electric current value and the guard value according to a change trend of the target electric current value. In such a configuration, the load drive controlling device improves an electric current response while preventing an over-accumulation of an integration value.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: September 12, 2017
    Assignee: DENSO CORPORATION
    Inventors: Yuuta Mizuno, Fumihiko Nakane, Fuminori Suzuki, Hiromitsu Nagata
  • Patent number: 9227610
    Abstract: A vacuum enhancer having four apertures, one of which is open to the atmosphere, wherein a piston selectively restricts fluid flow through an ejector based on a pressure differential between a vacuum chamber within the vacuum booster and true atmospheric pressure.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: January 5, 2016
    Assignee: Ford Global Technologies, LLC
    Inventors: Harbind S. Chahal, Charles K. Evans, Jr.
  • Patent number: 9163585
    Abstract: A portion of a fuel system of a vehicle is disclosed. The vehicle includes a brake system. The fuel system includes a fuel tank connected to an engine. The portion of the fuel system includes an evaporative emissions system and an evaporative emissions leak check system selectively fluidly-connected to the evaporative emissions system. The evaporative emissions leak check system includes a vacuum source. The vacuum source includes a vacuum pump connected to a brake boost device that provides power braking to the brake system of the vehicle. A method is also disclosed.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: October 20, 2015
    Inventors: Kurt D. McLain, Jeff DeFrank
  • Patent number: 9145886
    Abstract: An electric vacuum pump backup control system includes a brake on/off switch, a primary electric vacuum pump control interfacing with the brake on/off switch, a secondary electric vacuum pump control interfacing with the brake on/off switch and the primary electric vacuum pump control and an electric vacuum pump interfacing with the primary electric vacuum pump control.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: September 29, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Russ William Ferguson, Daniel A. Gabor, Gunnar Robert Ross, John Phillip McCormick
  • Patent number: 9126570
    Abstract: A hybrid or electric vehicle includes a hydraulic brake system having an active vacuum booster with an active boost control valve actuated by at least one controller. An isolation valve is disposed in a fluid circuit that fluidly connects a master cylinder to hydraulic brakes. A brake pedal is capable of moving in an initial deadband displacement range when initially depressed by an operator of the vehicle. While in the initial deadband displacement range, the controller selectively activates the isolation valve to inhibit fluid flow from at least a portion of the fluid circuit to the master cylinder based at least upon an operating state of the active boost control valve.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: September 8, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: John P. Joyce, Dale Scott Crombez, Daniel A. Gabor, John Phillip McCormick
  • Patent number: 9016806
    Abstract: A brake actuating unit for actuating a motor vehicle braking system of the “brake-by-wire” type having a brake booster. In order to provide a brake actuating unit for actuating a motor vehicle braking system of the “brake-by-wire” type, which on the one hand fulfills the statutory requirements care and which on the other hand is inexpensive to produce, it is proposed according to aspects of the invention, that the brake booster be provided as a travel-controlled brake booster, so that when not in the “brake-by-wire” operating mode the brake pedal is decoupled from feedback forces of the brake actuating unit, and the return force is simulated by the pedal travel simulator even when not in the “brake-by-wire” operating mode.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: April 28, 2015
    Assignee: Continental Teves AG & Co., oHG
    Inventors: Michael Vogt, Ingolf Buchholz, Alexander Schubert, Thomas Rössler, Thorsten Neu
  • Patent number: 8955922
    Abstract: A vehicle brake system and method for operating same, having a master brake cylinder, a brake medium reservoir, and a first brake circuit, connected via a reservoir line to the brake reservoir, having at least one first wheel brake cylinder, a first wheel inlet valve associated with the first brake cylinder, a first pump, by which a first brake medium volume is pumpable from the reservoir line through the open first wheel inlet valve into the first brake cylinder, a continuously adjustable first wheel outlet valve, by which a first brake medium displacement from the first cylinder into the brake reservoir is controllable, and a connecting line having a spring-loaded non-return valve, via which a delivery side of the first pump is connected to the brake reservoir, a brake medium displacement from the brake reservoir to the delivery side of the first pump being prevented by the spring-loaded non-return valve.
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: February 17, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Michael Kunz, Stefan Strengert
  • Patent number: 8899694
    Abstract: A brake system for a vehicle having a VIS actuator of an intake manifold, a vacuum pipe connected to the VIS actuator, and a vacuum pump connected to the vacuum pipe may be provided, which includes a vacuum hose having one end connected to the vacuum pipe to generate additional negative pressure, wherein the vacuum hose may be connected to a vacuum chamber. The brake negative pressure may be supplemented without increasing the capacity of the vacuum pump to improve the braking performance.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: December 2, 2014
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Il Suk Yang
  • Patent number: 8874343
    Abstract: The present invention relates mainly to a brake booster that is adjustable, notably in terms of the value of the jump. Advantageously, according to the invention, the target value for equilibrium of operation of the booster actuator is altered. A target value of a signal delivered by a position sensor is defined either by programming the electronic control unit or by selecting a coefficient in a program as a function of the braking characteristic or characteristics that it is desired to implement. Once the setpoint value has been determined, the electronic control unit commands the actuator using a setpoint value so that the actuator permanently and dynamically works toward achieving the previously defined and/or selected target value. The setpoint may be calculated as a function of torque, force, position or some other parameter.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: October 28, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Chris Anderson, Bastien Cagnac, Raynald Sprocq
  • Patent number: 8777333
    Abstract: A brake force generator for a motor vehicle brake system, comprises a displaceable force input element connected or connectable to a brake pedal, a control valve actuable in accordance with a displacement of the force input element, a chamber arrangement disposed in a booster housing and controllable by the control valve and comprises at least one vacuum chamber and at least one working chamber, which are separated from one another by at least one movable wall connected to the control valve, and a force output element for supplying a brake force to a downstream brake system, wherein the control valve with the force output element is biased by a resetting spring into a normal position, wherein the resetting spring is supported by its one end against the control valve.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: July 15, 2014
    Assignees: Lucas Automotive GmbH, TRW Braking Systems Polska SP.Z.O.O.
    Inventors: José Manuel Calvo Martinez, Kurt Wingender, Grzegorz Knapik
  • Patent number: 8775046
    Abstract: Systems and methods for detecting unintended acceleration of a vehicle. One system includes a first sensor that provides information on a brake booster vacuum. The vacuum is provided by the vehicle's engine and the brake booster multiplies a braking force initiated by a driver. A second sensor provides information on the vehicle's speed, and a third sensor provides information on the braking force initiated by the driver. The system also includes a controller configured to receive the information from the first sensor, second sensor, and third sensor and initiate corrective action if the brake booster vacuum is less than a predetermined threshold, the vehicle's speed is greater than a predetermined threshold, and the braking force initiated by the driver is greater than a predetermined threshold.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: July 8, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Robert M. Kaster, Francis Henry Kasperski, III, Carlos H. Atoche, Hideo Takada
  • Patent number: 8768591
    Abstract: The invention relates to a method for operating a brake boosted brake system of a vehicle, comprising the monitoring of a mode of operation of the brake boosted brake system with regard to agreement of a total braking torque applied to at least one wheel of the vehicle by the brake boosted brake system with a specified target total braking torque and/or with regard to a displacement of a brake medium volume of the brake boosted brake system to a force/pressure conversion element (22) of the brake boosted brake system, if a braking torque difference between the applied total braking torque and the specified target total braking torque is greater than a specified reference difference, and/or if the brake medium volume displaced to the force/pressure conversion element (22) is larger than a specified reference volume; further comprising the defining of a target boosting force change with regard to a boosting force (Fu) provided by a brake booster (14) of the brake boosted brake system, taking into account the br
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: July 1, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Herbert Vollert, Frank Kneip, Dirk Mahnkopf
  • Patent number: 8706376
    Abstract: To provide an ABS control system and software with an automatic parameter calibration function. An ABS control system according to the present invention includes an electronic control unit (ECU), a wheel speed sensor, and a brake pressure sensor. The wheel speed sensor and the brake pressure sensor measure wheel speed and brake pressure during ABS braking, and the ABS control system automatically calibrates an internal parameter used in ABS control in response to the wheel speed and brake pressure measurement results.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: April 22, 2014
    Assignee: Bosch Corporation
    Inventors: Shunsaku Ono, Shuichi Miyagawa
  • Patent number: 8672420
    Abstract: A system for evacuating gas from a brake booster of a motor vehicle includes: a first conduit adapted to be connected fluidly to the brake booster; an electric pump connected fluidly to the first conduit, and controllable to evacuate gas from the brake booster via the first conduit; a second conduit; an electric valve fluidly connecting the first and second conduits to each other; a mechanical pump connected fluidly to the second conduit, and adapted to be driven by a vehicle drive unit of the motor vehicle to evacuate gas from the brake booster via the first conduit, the electric valve, and the second conduit; and a control unit operatively associated with the electric pump and the electric valve, and configured to control operations of the electric pump and the electric valve according to a working state of the mechanical pump.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: March 18, 2014
    Assignee: Automotive Research & Testing Center
    Inventors: Jiun-Jie Chen, Shih-Chieh Huang, Chien-Tzu Chen, Yan-Sin Liao
  • Patent number: 8646431
    Abstract: To provide a vehicle provided with a valve-stop-mechanism-equipped internal combustion engine capable of ensuring a negative pressure in a brake booster while preventing with reliability fresh air from flowing into a catalyst during a valve stop control. An internal combustion engine provided with a valve stop mechanism capable of changing the operational state of an intake valve between a valve operating state and a valve closed/stopped state is provided. A brake booster is provided capable of assisting operation of a brake pedal of the vehicle. Exhaust side negative pressure passages are provided as communication passages that are configured to be in communication with each branch pipe section of an exhaust manifold in a period in which a negative pressure is generated in the case where the intake valve is in the valve closed/stopped state while an exhaust valve is allowed to open and close. The remaining end of the second exhaust side negative pressure passage is connected to the brake booster.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: February 11, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Katsuichi Miyasaka, Akio Kidooka
  • Patent number: 8452510
    Abstract: A device includes: actual-intake-pipe-pressure detection unit (11); estimated-intake-pipe-pressure detection unit (12) for calculating an estimated intake pipe pressure based on a rotation speed of the engine and an opening degree of a throttle valve; pressure difference calculation unit (13) for calculating a pressure difference between the actual and estimated intake pipe pressures; pressure difference integration unit (14) for integrating the pressure difference with respect to time; pumping brake detection unit (15) for determining that a pumping brake operation is performed when a integral value is equal to or more than a first determination value; and throttle valve control unit (16) for carrying out control for the pumping brake during the pumping brake operation based on a result of the determination by the pumping brake detection unit (15), and carrying out ordinary control otherwise.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: May 28, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akiyoshi Katayama, Takashi Matsumoto
  • Patent number: 8414090
    Abstract: An assistance-limit recognizing device for recognizing a limit of assistance made by a vacuum booster that is configured to assist an operating force applied to a brake operating member. A communication between a variable pressure chamber and a negative pressure chamber of the vacuum booster is established, when the operating force is not applied to the brake operating member. A communication between the variable pressure chamber and the atmosphere is established while the communication between the variable pressure chamber and the negative pressure chamber is cut off, when the operating force is applied to the brake operating member, whereby the operating force applied to the brake operating member is assisted based on a pressure difference between a pressure in the negative pressure chamber and a pressure in the variable pressure chamber.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: April 9, 2013
    Assignees: Toyota Jidosha Kabushiki Kaisha, Advics Co., Ltd.
    Inventors: Koichi Tomida, Tomohiro Kato
  • Patent number: 8393688
    Abstract: The three-way valve simulator (100) for a vehicle brake servo comprises: a control piston (106); and a reaction piston (140) remote from the control piston when the simulator is at rest. It is arranged such that the control piston, under the effect of a command transmitted from outside the simulator, can be moved over a predetermined travel in the direction of the reaction piston without transmitting stress to the latter.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: March 12, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Chris Anderson, Bastien Cagnac, Raynald Sprocq
  • Patent number: 8375843
    Abstract: The present invention relates to a brake booster device for a vehicle brake system comprising a force input element, a control valve arrangement actuable via the force input element, a chamber arrangement disposed in a housing and comprising a vacuum chamber and a working chamber, which is separated from the vacuum chamber by a movable wall and connectable selectively to a vacuum source or the atmosphere, and a force output element, wherein the movable wall is biased into a normal position by a resetting spring accommodated at least partially in the housing and wherein the housing is penetrated by at least one fastening bolt. In this case, it is provided that at least one damping element acts for the purpose of vibration damping on the resetting spring, wherein the at least one damping element is mounted on the at least one fastening bolt.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: February 19, 2013
    Assignee: Lucas Automotive GmbH
    Inventors: José Manuel Calvo, Hans-Jürgen Griebel, Lothar Zeuner
  • Patent number: 8360739
    Abstract: A control apparatus for a negative pressure generating apparatus that includes an ejector that generates a negative pressure whose magnitude is larger than that of a negative pressure to be taken from an intake passage in an intake system for an internal combustion engine provided in a vehicle; and state change means for making the ejector function or stop functioning. The control apparatus includes prohibition control means for prohibiting the state change means from making the ejector function, according to a temperature of intake air.
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: January 29, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Shigemasa Hirooka
  • Patent number: 8322800
    Abstract: The invention relates to a braking control system for automotive vehicles comprising a braking control member (1), a brake booster (4) and a brake master cylinder (5). The system of the invention further comprises a simulator (3) coupled pneumatically to the piston (42) of the brake booster (4). Said simulator (3) receives at least one braking command from the braking control member (1) and makes it possible to establish, in return, a difference in pressure between the front chamber (40) and the rear chamber (41) of the brake booster so as to control the displacement of the piston (42). Application: Brakes for automotive vehicles.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: December 4, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Chris Anderson, Raynald Sprocq, Carole Charpentier
  • Patent number: 8303048
    Abstract: The invention relates to a brake control system for motor vehicles and, in particular, to a hydraulic control system. The invention also applies to hybrid braking systems such as those provided in hybrid vehicles (vehicles propelled electrically and propelled using internal combustion engines) comprising a hydraulically operating braking system which comprises a simulator (3) not mechanically coupled to the brake booster piston (42) and an electric braking system using the electric propulsion motor or motors as electric generators.
    Type: Grant
    Filed: January 8, 2007
    Date of Patent: November 6, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Chris Anderson, Raynald Sprocq
  • Patent number: 8239110
    Abstract: A method of operating a drivetrain of a motor vehicle. The drivetrain comprises a drive aggregate formed as a hybrid drive with a combustion engine and an electric machine, and a transmission connected between the drive aggregate and a drive output. The drivetrain also comprises a pressure reservoir system with at least one pressure reservoir and at least one pressure generator by the combustion engine in order to fill the pressure reservoir. A pressure in the pressure reservoir of the pressure reservoir system is measured and a value of the actual pressure, in the pressure reservoir system, is compared with at least one threshold value. When the actual pressure value is higher than a threshold value, stopping of the combustion engine is permitted, whereas if the actual pressure value is lower than the threshold value, stopping of the combustion engine is not permitted.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: August 7, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Johannes Kaltenbach, Notker Amann, Alexander Banerjee, Christian Mittelberger, Mesut Er
  • Patent number: 8231182
    Abstract: A method for creating low pressure in a brake activation device of a motor vehicle brake system, comprising a pneumatic brake force booster the interior of which is divided into at least one low-pressure chamber and one working chamber, a brake master cylinder and a pneumatic motor pump unit for creating the low pressure in the low-pressure chamber, which motor pump unit comprises a low-pressure pump and a motor driving the low-pressure pump, a low-pressure level in the low-pressure chamber or a pressure difference between the low-pressure chamber and the working chamber being detected by a sensor and the motor pump unit being activated by an electronic control unit if the pressure falls below a first predefined, lower low-pressure level Pe in the low-pressure chamber and being deactivated if a second predetermined, upper low-pressure level Pa is reached.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: July 31, 2012
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Jürgen Schonlau, Manfred Rüffer, Horst Krämer, Michael Jürging
  • Patent number: 8226175
    Abstract: A brake system of the brake-by-wire (BBW) type for a vehicle having a brake pressure signal generator which can be activated by a brake pedal and can be connected to wheel brakes outside the BBW operating mode, having a pressure source which can be actuated by an electronic control unit and can be connected to the brakes of the vehicle in the BBW operating mode, having provisions for sensing a driver's deceleration request and having a pedal travel simulator which interacts with the brake pedal. A restoring force acting on the brake pedal can be simulated in the BBW operating mode independently of the actuating of the pressure source, and having a device which can be actuated by the electronic control unit and which permits activation of the pedal travel simulator in the BBW operating mode and deactivation of the pedal travel simulator outside the BBW operating mode.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: July 24, 2012
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Peter Drott, Holger von Hayn, Thomas Sellinger, Horst Kraemer
  • Patent number: 8128179
    Abstract: According to a method for operating an actuating unit for motor vehicle brakes, an electromagnet that actuates a sealing seat of its control valve is controlled by a minimum current during a pressure-maintaining phase which is carried out independently of the vehicle operator's will, in order to avoid damaging of the coil of the electromagnet. To this end, a current controlling the electromagnet is slowly reduced until a previously fixed pressure decrease compared to the original value occurs. A previously fixed value is added to this current value, and the electromagnet is actuated by a current value corresponding to the result of the addition.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: March 6, 2012
    Assignee: Continental Teves AG & Co. OHG
    Inventors: Mark Baijens, Markus Ohly
  • Patent number: 8083294
    Abstract: A braking system for a vehicle includes an active booster master cylinder connected with the wheel cylinders, and a controller for operating active booster master cylinder during braking. The primary master cylinder, which is located remotely from the active booster master cylinder, is selectably connected with either a pedal feel emulator or a servo system which applies the brakes using the active booster master cylinder and a hydraulic output from the primary master cylinder in the event that control of the active booster master cylinder becomes impaired.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: December 27, 2011
    Assignee: Ford Global Technologies
    Inventors: Dale Scott Crombez, Daniel A. Gabor
  • Patent number: 8070239
    Abstract: A regenerative braking coordination device has a braking operating member receiving an input from a driver in the form of an operation amount, an input shaft operable for transmitting the operation amount, and a braking force boosting device operable to generate a hydraulic braking pressure corresponding to the operation amount transmitted by the input shaft. The device further includes a hydraulic pressure braking device to generate a braking force and an operation amount absorber for absorbing the operation amount of the input shaft. The operation amount absorber includes a cylinder, a piston dividing the interior of the cylinder into first and second hydraulic chambers and an orifice connecting the first and second hydraulic chambers. The orifice can be in the piston or in a flow channel.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: December 6, 2011
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Akihiro Itoh
  • Patent number: 8053690
    Abstract: An automotive brake light switch mounted on a brake booster includes a housing defining a constant pressure chamber and a variable pressure chamber partitioned by a diaphragm, with a first through-hole of the housing, a second through-hole formed in the diaphragm and an air intake valve to allow the constant pressure chamber to selectively communicate with the variable pressure chamber, wherein the air intake valve is fitted into the second through-hole and configured to selectively open or close the first through-hole in response to a brake pedal, the brake light switch apparatus having a switch body, a switch rod slidably mounted to the switch body so as to turn on/off a switch of the switch body, wherein a protruding length of the switch rod is changeable by the air intake valve, and a coupling portion coupling the switch body to the housing through the first through-hole.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: November 8, 2011
    Assignee: Hyundai Motor Company
    Inventor: Jae Ho Jang
  • Patent number: 8038228
    Abstract: In a method for controlling the pressure buildup in an electronically controllable brake system, preferably for use in motor vehicles, including a master brake cylinder, in particular a tandem master brake cylinder (TMC), a vacuum brake booster (booster), at least one additional pressure source for brake force assistance, preferably a hydraulic pump which is drivable by a controlling unit and the pressure of which can be applied to wheel brakes of the vehicle, an approach of a point where the auxiliary-force to actuating-force ratio (operating point) of the vacuum brake booster (booster) falls below a predetermined ratio is detected, that a pressure gradient in the master brake cylinder (TMC pressure gradient) is detected, and that in the event of a detected approach of the operating point of the booster and when a pressure gradient limit value of the detected TMC pressure gradient is exceeded, the additional pressure source is activated for brake force assistance, for the purpose of building up additional br
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: October 18, 2011
    Assignee: Continental Teves AG & Co., OHG
    Inventors: Ralph Gronau, Tobias Scheller, Ralf Revoil, Andreas Neu
  • Patent number: 8029073
    Abstract: The invention relates to a brake booster with a short operating travel, in which the three-way valve comprises a mobile valve seat borne by a sleeve (54). The movement of this sleeve is controlled by the piston. According to the invention, there is an elastic device (70) applying force to the sleeve (54) in the direction of the front of the booster, and tending to move this sleeve forward with respect to the pneumatic piston (12). In addition, there is a device for transmitting the pressure of the master cylinder (120) to the sleeve (54) and that tends to apply a rearward force to the sleeve (54).
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: October 4, 2011
    Assignee: Robert Bosch GmbH
    Inventor: Jean-Marc Attard
  • Patent number: 8002364
    Abstract: A control unit of a brake apparatus includes a compensation braking force controlling device for controlling a compensation braking force in response to an operation of a brake operating member so that a characteristic of a total braking force relative to the operation of the brake operating member agrees with a predetermined target characteristic. The total braking force is a sum of the compensation braking force containing a pressurizing hydraulic braking force based upon at least the pressurization and a basic hydraulic pressure braking force based upon the basic hydraulic pressure. The compensation braking force controlling device includes: a judging device for judging whether the vehicle has stopped, and a limiting device for limiting the amount of pressurization via a pressure control valve when the judging device determines that the vehicle has stopped.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: August 23, 2011
    Assignee: Advics Co., Ltd.
    Inventors: Koichi Kokubo, Kazuya Maki, Masayuki Naito
  • Patent number: 7959237
    Abstract: The invention relates to a braking device for a motor vehicle fitted with an air conditioning circuit (K), this braking device comprising a source of fluid (F1) at a relatively high pressure, a source of fluid (F2) at a relatively low pressure, and a pneumatic brake booster (F3) selectively connected to one or other of the sources of fluid (F1, F2). According to the invention, the source of fluid (F1) at a relatively high pressure comprises a portion (KC1) of the air conditioning circuit (K) that is placed downstream of the air conditioning compressor (K1) and upstream of the air conditioning expansion valve (K2), in one direction of flow (X) of the cooling fluid in the air conditioning circuit (K).
    Type: Grant
    Filed: December 13, 2004
    Date of Patent: June 14, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Aleksander Hurwic, Alain Fillon
  • Patent number: 7950128
    Abstract: A device (100) for assembling a pneumatic booster (200) wherein a cover (203) of the booster is housed in a support (101) and a cylindrical cap (104) whose internal volume (107) is greater than a volume of a cylinder (206) of the booster, covers the cylinder placed on the cover. A gearing element (110) of the device rotates two sets of rollers (109A and 109B) about the booster and an eccentric (118) controlled by the gearing element allows an oscillating movement of the rollers against a wall of the booster. The swaging is achieved by alternately applying the rollers (109A) and (109B) and an angle of attack (114A) of the first rollers is greater than an angle of attack (114B) of the second rollers.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: May 31, 2011
    Assignee: Robert Bosch GmbH
    Inventor: Juan Simon Bacardit
  • Patent number: 7909413
    Abstract: The brake actuation device of a motor vehicle brake system includes a pneumatic brake booster 1, the interior of which is subdivided into at least one vacuum chamber and one working chamber, a master brake cylinder 2 and a pneumatic motor-and-pump assembly 3 for providing the vacuum in the vacuum chamber, which has a vacuum pump 6 and a motor 7 driving the vacuum pump 6. A vacuum level in the vacuum chamber or a difference in pressure between the vacuum chamber and the working chamber is sensed using a sensor 9, and the motor-and-pump assembly 3 is enabled by an electronic control unit 12 when the vacuum falls below a first defined bottom vacuum level Pe in the vacuum chamber and is disabled when a second defined top vacuum level Pa is reached. The rotational speed np of the motor-and-pump assembly 3 is controlled depending on driving conditions of the vehicle.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: March 22, 2011
    Assignee: Continental Teves AG & Co., OHG
    Inventors: Jürgen Schonlau, Manfred Rüffer, Jose Gonzales
  • Patent number: 7722132
    Abstract: The present invention relates to an internal combustion engine (1) of the Otto type, comprising an induction pipe (3) in conjunction with the engine's (1) cylinders, a brake servo unit (15), a flow connection (29) for evacuating air from the brake servo unit (15) to the induction pipe (3) for the purpose of building up a vacuum inside the brake servo unit (15), in conjunction with which a Venturi unit (25) is arranged in the flow connection (17, 19) to assist with the building up of the aforementioned vacuum. The internal combustion engine is characterized in that the flow connection (17, 19) comprises a bypass line (29) having a lower flow resistance than the Venturi unit (25), the bypass line (29) being intended to connect the evacuated air past the Venturi unit (25) in the event of a transient vacuum in the induction pipe (3).
    Type: Grant
    Filed: May 25, 2006
    Date of Patent: May 25, 2010
    Assignees: GM Global Technology Operations, Inc, Fiat Auto S.p.A.
    Inventor: Mats Carlsson
  • Patent number: 7686404
    Abstract: A hydraulic brake system for a motor vehicle supplies pressurized brake fluid to a wheel brake in response to a demand signal. The brake system includes a master cylinder in fluid communication with the wheel brake to control the actuation thereof. Furthermore, actuation of the master cylinder is controlled and/or amplified by first and second pressure-amplifying mechanisms, which are electrically controlled by an electrical control unit.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: March 30, 2010
    Assignee: Continental Teves, Inc.
    Inventors: Kurt Stouffer Lehmann, Robert Charles Beaver, David Leslie Agnew, Kent Randolph Young
  • Patent number: 7549711
    Abstract: A vacuum pressure booster has a booster shell; a booster piston; a valve cylinder including: a valve piston; an input rod; a control valve; and an input return spring, and the control valve including: an annular vacuum pressure introducing valve seat; an atmosphere introducing valve seat; a valve body including: an annular attaching bead portion; an expansion cylinder portion; and an annular valve portion; and a valve spring, wherein the attaching bead portion is tightly held by a pair of cylindrical holding portions formed in a pair of valve holders attached to the valve cylinder, and the diameter of the holding portion is smaller than the inner diameter of the valve cylinder.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: June 23, 2009
    Assignee: Nissin Kogyo Co., Ltd.
    Inventor: Shuuichi Yatabe
  • Patent number: 7537294
    Abstract: In a method of controlling a hydraulic vehicle brake system with active hydraulic brake force boosting, wherein the driver can introduce brake pressure into a master brake cylinder with an actuating device, wherein the pressure introduced by the driver is boosted by an active hydraulic pressure increasing unit, a braking request or a suspected braking request of the driver is determined and, when a braking request or a suspected braking request of the driver is detected, a separating valve that is arranged in a line connecting the master brake cylinder and the hydraulic pressure increasing unit is opened or remains open and the pressure increasing unit is actuated for pressure generation purposes.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: May 26, 2009
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Helmut Fennel, Thomas Sticher