Having Vacuum Motor Control Patents (Class 303/115.3)
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Patent number: 11007993Abstract: A brake pump for vehicles having a pump body and an actuation device, operatively associated with the pump body. The actuation device being operable to generate a braking. A piston is housed inside a housing of the pump body, the piston being operable by the actuation device to vary the pressure of a brake fluid in a braking system to which the brake pump belongs, to generate the braking. The brake pump also has a switch group and an auxiliary actuation element.Type: GrantFiled: December 23, 2016Date of Patent: May 18, 2021Assignee: Freni Brembo S.p.A.Inventors: Roberto Lavezzi, Mauro Reolon
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Patent number: 10975811Abstract: A method of securing brake booster negative pressure is provided. The method includes operating a purge pump that is connected to a canister having evaporation gas absorbed thereon and a brake booster and determining whether the evaporation gas is injected into an intake pipe by the operation of the purge pump. Whether a negative pressure of the brake booster is insufficient is determined and when the evaporation gas is being injected into the intake pipe and the negative pressure is insufficient, a degree of opening of a valve provided in a line connecting the canister and the purge pump is adjusted.Type: GrantFiled: December 2, 2019Date of Patent: April 13, 2021Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Young-Kyu Oh, Youn-Su Kim, Keum-Jin Park
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Patent number: 10358847Abstract: An external impact avoiding part makes a sensor failure detection part withhold from determining that a right or left door pressure sensor has failed when a right-left detection difference calculated at first time is a threshold value or larger, and makes a detection value comparison part calculate the right-left detection difference again after a calming time has elapsed. An effect of closing operation of a right door on the right door pressure sensor or an effect of closing operation of a left door on the left door pressure sensor reduces during the calming time. The avoiding part subsequently makes the detection part compare the right-left detection difference calculated again with the threshold value. As a result of the comparison, when the right-left detection difference is the threshold value or larger, the avoiding part makes the detection part determine that the right or left door pressure sensor has failed.Type: GrantFiled: November 12, 2015Date of Patent: July 23, 2019Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuu Nakazawa, Hisashi Hagiwara, Yusuke Mase, Yujiro Miyata
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Patent number: 9975436Abstract: A method of controlling a vehicle having a first axle driven by an internal combustion engine, and a second axle independently driven by an electric device includes determining if the accelerator pedal is disposed in a depressed position or in a non-depressed position, and determining if a brake pedal is disposed in a depressed position or in a non-depressed position. An axle control strategy for controlling energy regeneration of an energy storage device is selected based on the position of the accelerator pedal being in either the depressed position or the non-depressed position, and the position of the brake pedal being in either the depressed position or the non-depressed position. A control signal is communicated to at least one of the first axle or the second axle to implement the selected axle control strategy.Type: GrantFiled: May 24, 2016Date of Patent: May 22, 2018Assignee: GM Global Technology Operations LLCInventors: Marsella L. White, Michael G. Petrucci
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Patent number: 9234908Abstract: A rotation detecting device, which is compatible regardless of whether a process control device for processing an output signal of the rotation detecting device is standard one or new one having high input signal resolving power, and, also, a rotation detecting device equipped bearing assembly having such rotation detecting device, are provided. The rotation detecting device includes an encoder provided rotatably and having a plurality of circumferentially equidistantly arranged to-be-detected poles, and a sensor for detecting the to-be-detected poles. The use is made of a multiplying unit for multiplying the phase of the to-be-detected poles from an output of the sensor. The use is also made of a pulse outputting unit for receiving an output of the multiplying unit or both the output of the multiplying unit and an output of the sensor and output pulses having two multiplying powers different from each other.Type: GrantFiled: June 10, 2010Date of Patent: January 12, 2016Assignee: NTN CORPORATIONInventors: Kiyotake Shibata, Toru Takahashi, Takayuki Norimatsu
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Patent number: 8376475Abstract: A device for supplying pressure to an actuation unit of a vehicle brake system, in particular to a vehicle brake system of the ‘brake-by-wire’ type, including a pneumatic motor-and-pump assembly with a pump and a motor driving the pump, wherein the motor-and-pump assembly is controlled by an electronic control unit depending on a pressure level or pressure difference in a pneumatic brake booster of the actuation unit, with the pressure level in a chamber or a difference in pressure between two chambers of the brake booster being detected by a sensor. In order to maintain the availability of the service brake function as high as possible and to obtain a maximum possible redundancy, the control unit, used to control the motor-and-pump assembly includes a logic module and a power module, which are arranged separately of each other.Type: GrantFiled: June 17, 2010Date of Patent: February 19, 2013Assignee: Continental Teves AG & oHGInventors: Manfred Rüffer, Georg Fachinger, Holger Wahl, Albrich von Albrichsfeld, Uwe Karl
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Patent number: 8177309Abstract: A leak diagnostic system for a vehicle comprises a calculation module and a diagnostic enabling module. The calculation module calculates a decay rate of a brake booster vacuum. The diagnostic enabling module selectively enables the decay rate calculation based on mass airflow (MAF) into an engine and engine vacuum.Type: GrantFiled: May 13, 2008Date of Patent: May 15, 2012Inventors: Zhong Wang, Tony T. Hoang, Lan Wang, Wenbo Wang, Margaret C. Richards, Daryl A Wilson
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Patent number: 7934779Abstract: In the hybrid vehicle of the invention, when the sum of a regenerative braking force BFr produced by a motor and an operational braking force BFpmc based on a master cylinder pressure Pmc is insufficient for a braking force demand BF* required by the driver in response to the driver's depression of a brake pedal, the motor and a brake actuator of an HBS are controlled to satisfy the braking force demand BF* by the total of the regenerative braking force BFr of the motor, the master cylinder pressure Pmc-based operational braking force BFpmc, and a compensated braking force BFpp based on a pressure increase by two pumps included in the brake actuator (steps S170 through S190).Type: GrantFiled: May 17, 2007Date of Patent: May 3, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shinya Kodama, Michihito Shimada, Kazuya Maki
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Patent number: 7909413Abstract: 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: GrantFiled: June 17, 2005Date of Patent: March 22, 2011Assignee: Continental Teves AG & Co., OHGInventors: Jürgen Schonlau, Manfred Rüffer, Jose Gonzales
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Patent number: 7823986Abstract: A device for supplying pressure to an actuation unit of a vehicle brake system, in particular to a vehicle brake system of the ‘brake-by-wire’ type, comprising a pneumatic motor-and-pump assembly with a pump and a motor driving the pump, wherein the motor-and-pump assembly is controlled by an electronic control unit depending on a pressure level or pressure difference in a pneumatic brake booster of the actuation unit, with the pressure level in a chamber or a difference in pressure between two chambers of the brake booster being detected by means of a sensor. In order to maintain the availability of the service brake function as high as possible and to obtain a maximum possible redundancy, the control unit, used to control the motor-and-pump assembly comprises a logic module and a power module, which are arranged separately of each other.Type: GrantFiled: August 4, 2005Date of Patent: November 2, 2010Assignee: Continental Teves AG & Co. oHGInventors: Manfred Rüffer, Georg Fachinger, Holger Wahl, Albrich von Albrichsfeld, Uwe Karl
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Publication number: 20090184569Abstract: A stud bolt (1) is disposed with a bolt head portion (2), a bolt shoulder portion (3) whose diameter is smaller than the diameter of the bolt head portion (2), and a thread portion (4b) whose diameter is smaller than the diameter of the bolt shoulder portion (3), wherein the bolt shoulder portion (3) includes a knurling portion (3b) that includes projecting portions (3b1) and groove portions (3b2) on its outer periphery and at least part of which eats into a container (10) during staking and a bolt base portion (3a) that is disposed between the knurling portion (3b) and the bolt head portion (2) and has a peripheral surface that is smoother than the knurling portion (3b).Type: ApplicationFiled: May 28, 2007Publication date: July 23, 2009Inventors: Shinichi Inagaki, Toru Sato, Nobuyuki Yamashita
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Publication number: 20070284937Abstract: In a brake system for a hybrid motor vehicle, while it is set to pure electric drive mode, the crankshaft of the combustion engine is driven temporarily with the aid of at least one electric motor for generating reduced pressure in the intake manifold for supplying reduced pressure of the additional vacuum reservoir to the vacuum chamber of its brake booster only when, during or following the single or multiple actuation of the brake pedal thereof, the reduced pressure in the vacuum reservoir of the brake booster drops to a predeterminable lower limit or falls below the lower limit.Type: ApplicationFiled: June 13, 2007Publication date: December 13, 2007Inventors: Mathias Deiml, Florian Gutknecht-Stohr, Roland Herfurth, Frank Hofel, Wei-Lung Lee, Martin Rampeltshammer, Matthias Tons
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Patent number: 7152933Abstract: An algorithm residing in, for example the ECM of a motor vehicle, which predicts brake booster vacuum for vehicles using vacuum for brake pedal assist. The predicted brake booster vacuum is compared to a calibrated brake booster vacuum threshold to determine if adequate brake booster vacuum is available to meet vehicle braking requirements, whereupon engine operation can be modified, as necessary, to improve intake manifold vacuum such that brake booster vacuum requirements for vehicle braking are better satisfied.Type: GrantFiled: November 3, 2005Date of Patent: December 26, 2006Assignee: General Motors CorporationInventors: James F. Collins, Robert L. Nisonger, Christopher P. Murphy
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Patent number: 7040719Abstract: An algorithm residing in, for example the ECM of a motor vehicle, which predicts brake booster vacuum for vehicles using vacuum for brake pedal assist. The predicted brake booster vacuum is compared to a calibrated brake booster vacuum threshold to determine if adequate brake booster vacuum is available to meet vehicle braking requirements, whereupon engine operation can be modified, as necessary, to improve intake manifold vacuum such that brake booster vacuum requirements for vehicle braking are better satisfied.Type: GrantFiled: April 1, 2004Date of Patent: May 9, 2006Assignee: General Motors CorporationInventors: James F. Collins, Robert L. Nisonger, Christopher P. Murphy
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Patent number: 6739676Abstract: Vehicle braking system including a vacuum booster for transmitting a boosted brake operating force to a master cylinder such that the boosting ratio is reduced at a fixed transition point before the boosting limit point is reached, a brake having a wheel brake cylinder connected through a fluid passage to a master cylinder serving as a first hydraulic pressure source, for braking a wheel, and a pressure increasing device having a second hydraulic pressure source connected to the fluid passage, and wherein the pressure increasing device initiating a pressure increasing operation, when the brake operating force has increased to the transition point, to increase the wheel cylinder pressure to be higher than the master cylinder pressure, by using the second hydraulic pressure source.Type: GrantFiled: January 19, 1999Date of Patent: May 25, 2004Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Seiki Kabushiki KaishaInventors: Hiroshi Isono, Yasuji Mizutani, Yutaka Onuma, Koichi Kondo, Hirofumi Nitta, Motoshi Suzuki
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Patent number: 6676230Abstract: A vehicle motion control device reduces noise resulting from operation of a vacuum booster when an automatic pressure control is performed by properly controlling the energization of a linear solenoid of a booster actuator. An automatic hydraulic pressure generator is controlled in accordance with the vehicle motion condition and a hydraulic pressure control valve device is controlled to perform the automatic pressure control. A target electric current of the linear solenoid for actuating the vacuum booster is instantaneously increased to a starting target value which corresponds to an electric current value immediately before starting the operation of the vacuum booster and which is less than a maximum value of the target electric current, and then is gradually increased approximately to the maximum value of the target electric current.Type: GrantFiled: October 19, 2001Date of Patent: January 13, 2004Assignee: Aisin Seiki Kabushiki KaishaInventors: Tetsuya Kuno, Tetsuaki Tsuzuki, Akitaka Nishio, Masanobu Fukami, Shiro Monzaki
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Publication number: 20030214178Abstract: A pneumatic brake booster for a motor vehicle wherein movements of a control rod (38) determine the openings and closings of at least one axial intake valve (52) and at least one equalizing valve (50). The intake valve (52) being inserted between a pressure source subjected to the pressure (Pa) higher than the first pressure (P1) and a rear chamber (18) of the booster, and the equalizing valve (50) being inserted between a front chamber (16) and the rear chamber (18) to actuate a moving partition (14) located between the front chamber (16) and the rear chamber (18). A tubular element (76) of that is axially offset transverse faces (78, 80) comprised of first elements (82, 84) for sealing the axial intake and equalizing valves (50, 52).Type: ApplicationFiled: June 4, 2003Publication date: November 20, 2003Inventors: Ulysse Verbo, Philippe Richard, Jean-Charles Maligne, Stephane Lacroix
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Patent number: 6554373Abstract: The present invention discloses a brake system for automotive vehicles including a vacuum brake power booster which is operable preferably by a solenoid irrespective of the actuation by the driver. In order to sense the actuating speed during actuation introduced at a brake pedal by the driver, the present invention provides a travel sensor of proportional operation which is operable by the axial movement of the movable wall of the vacuum brake power booster, and the output signal of the travel sensor is directly proportional to the actuating travel of the movable wall and is subjected to a time differentiation processing operation in an electronic control unit.Type: GrantFiled: July 31, 1998Date of Patent: April 29, 2003Assignee: ITT Manufacturing Enterprises, Inc.Inventor: Karlheinz Bill
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Publication number: 20030075976Abstract: The invention provides a braking servomotor, comprising an actuating piston for a master cylinder, a resiliently returned control rod, sliding in the piston as a function of an input force, the end of said rod bearing a plunger on which a finger (52) is slidingly fitted so as to bias a reaction disk of the actuating rod and transmit the reaction of the piston to the control rod, and including a unidirectional clutch device, comprising a key (60) and a sleeve (58) incorporating the finger (52), said sleeve being slidably mounted on the plunger and capable, when the control rod is actuated at a given speed, of being locked in relation to the moving piston, independently of the control rod, characterised in that the sleeve (58) comprises a first and a second adjustable parts (104, 106) which can be axially plastically deformed for an adjustment of the servomotor prior to its assembly.Type: ApplicationFiled: August 3, 2001Publication date: April 24, 2003Inventor: Joan Simon Bacardit
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Patent number: 6536850Abstract: A method for controlling vacuum in an intake conduit of a combustion engine in a vehicle is provided. The vehicle is provided with a brake booster and an actuator for actuating the brake booster. Actuation of the brake booster causes a throttle valve in the intake conduit to close creating a vacuum to the brake booster.Type: GrantFiled: May 14, 2001Date of Patent: March 25, 2003Assignee: Volvo Personvagnar ABInventors: Göran Almkvist, Marcus Maxvall, Henrik Green, Olle Fast
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Publication number: 20020185912Abstract: A vehicle motion control device which includes a wheel cylinder equipped on a vehicle wheel; an automatic hydraulic pressure generator generating a brake hydraulic pressure irrespective of the operation of a brake pedal by using an intake vacuum pressure of an engine of a vehicle; a hydraulic pressure control valve disposed between the wheel cylinder and the automatic hydraulic pressure generator; a throttle opening amount automatic adjusting device for adjusting automatically the opening amount of a throttle valve of the engine irrespective of the operation of an accelerator pedal of the vehicle; control, device for controlling the automatic hydraulic pressure generator and the hydraulic pressure control valve in accordance with a running condition of the vehicle and for performing an automatic pressure increase control to the wheel cylinder at least non-operating condition of the brake pedal, the control means for controlling the throttle opening amount automatic adjusting device in accordance with the runnType: ApplicationFiled: May 29, 2002Publication date: December 12, 2002Inventor: Masanobu Fukami
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Patent number: 6422660Abstract: The present invention is directed to a brake control system, which includes wheel brake cylinders, a master cylinder, a reservoir communicated with the wheel brake cylinders, normally open solenoid valves disposed between the master cylinder and the wheel brake cylinders, respectively, normally closed solenoid valves disposed between the wheel brake cylinders and the reservoir, respectively, a hydraulic pump for supplying the brake fluid to a passage for connecting the master cylinder with the normally open valves, and an automatically pressurizing device (e.g., a vacuum booster with a changeover valve) which is provided for advancing the master piston irrespective of operation of the pump and the brake pedal to generate hydraulic braking pressure from the master cylinder.Type: GrantFiled: February 14, 2001Date of Patent: July 23, 2002Assignee: Aisin Seiki Kabushiki KaishaInventors: Kenji Tozu, Akitaka Nishio
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Publication number: 20020057013Abstract: A vehicle motion control device reduces noise resulting from operation of a vacuum booster when an automatic pressure control is performed by properly controlling the energization of a linear solenoid of a booster actuator. An automatic hydraulic pressure generator is controlled in accordance with the vehicle motion condition and a hydraulic pressure control valve device is controlled to perform the automatic pressure control. A target electric current of the linear solenoid for actuating the vacuum booster is instantaneously increased to a starting target value which corresponds to an electric current value immediately before starting the operation of the vacuum booster and which is less than a maximum value of the target electric current, and then is gradually increased approximately to the maximum value of the target electric current.Type: ApplicationFiled: October 19, 2001Publication date: May 16, 2002Inventors: Tetsuya Kuno, Tetsuaki Tsuzuki, Akitaka Nishio, Masanobu Fukami, Shiro Monzaki
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Patent number: 6371576Abstract: A control method of a hydraulic pressure source-driving type vehicle hydraulic brake system is provided in which water hammering or worsening of the brake feeling does not occur when brake liquid is replenished through a replenish passage. A motor for driving a pump is actuated at a full driving force with an on-off valve in the brake liquid replenish passage opened in the stage in which the hydraulic pressure difference between the master cylinder pressure and the brake hydraulic pressure is small. Also, in the stage in which the brake hydraulic pressure is increased, so that the hydraulic pressure difference from the master cylinder hydraulic pressure has entered a predetermined range, a solenoid valve in the replenish passage is closed to return to the normal control in which the driving force of the motor is controlled so as to correspond to the hydraulic pressure difference.Type: GrantFiled: March 27, 2001Date of Patent: April 16, 2002Assignee: Sumitomo (SEI) Brake Systems, Inc.Inventor: Keita Nakano
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Patent number: 6227628Abstract: A service brake for a vehicle, having two brake circuits which can be acted upon by pressurized fluid by way of a vacuum brake booster and a dual brake master cylinder, has at least one switchable device for changing the hydraulic pressure intensification by which, in the event of a failure of the brake booster, the pressure of the brake fluid is increased in each of the two brake circuits.Type: GrantFiled: May 26, 1999Date of Patent: May 8, 2001Assignee: DaimlerChrysler AGInventors: Siegfried Emmann, Christian Mosler, Werner Spielmann
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Patent number: 6199960Abstract: A method of preventing a vacuum from developing in a low-pressure area of a vehicle anti-lock brake system comprises providing periodically opening normally closed electromagnet valves when brakes are not applied, the valves connecting wheel brakes to a tandem master cylinder by low pressure lines passing through the low-pressure area. As a result, pressures in a tandem master cylinder of the system and the low-pressure area level off and thus a vacuum trapped in the low-pressure area is eliminated.Type: GrantFiled: December 23, 1998Date of Patent: March 13, 2001Assignee: Continental Teves AG & Co., OHGInventor: David J. Kramer
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Patent number: 6185498Abstract: An electronically controllable brake booster with a vacuum chamber and a pressure chamber, which are separated from each other by a movable wall, a control valve arrangement which can be actuated by an electromagnetic actuation device, through which a pressure difference between the pressure chamber and the vacuum chamber can be adjusted, with the control valve arrangement, as a function of a current flowing through the electromagnetic actuation device, assuming a holding position in which the current ranges between a higher value and a lower value without the control valve arrangement leaving the holding position, a first pressure changing position in which the current is higher than the higher value, and a second pressure changing position in which the current is lower than the low value, characterised in that upon a changeover of the control valve arrangement from the holding position into the first or the second pressure changing position, or upon a changeover from the first or the second pressure changinType: GrantFiled: March 31, 2000Date of Patent: February 6, 2001Assignee: Lucas Industries public limited companyInventors: Christoph Linden, Gregor Godlewsky, Lorenz Maack