System Controlled By Expansible Chamber Type Modulator Patents (Class 303/115.1)
  • Patent number: 10486667
    Abstract: In the present invention, when a first protrusion of a shaft abuts on a guide face thereby pressing a first valve element toward the top as seen in the drawing, the guide face is separated from a cylinder seat face, and a large-diameter oil passage is opened. At this time, when the first protrusion abuts on the guide face thereby driving the first valve element to the position where the valve opens, the first valve element is also pressed in a direction perpendicular to the reciprocating direction of the first valve element because the guide face has a spherical surface or a tapered surface. Thus, the first valve element is supported at two points, point E and point F or G, thereby dampening vibrations.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: November 26, 2019
    Assignee: ADVICS CO., LTD.
    Inventor: Tomoo Harada
  • Patent number: 10457262
    Abstract: An actuating device of a brake system controlled by a brake pedal and/or a brake management system for supplying brake circuits with pressurized brake fluid includes a master cylinder, an electric motor, a ball/nut screw transmission, a nut, a screw, and a free connection rod. The master cylinder is connected to the brake circuits and has a primary piston. The electric motor is controlled for a braking action. The ball nut/screw transmission is configured to transform rotary movement of the electric motor into a translational movement of the primary piston. The nut is blocked from moving in translation, free to rotate, and driven by the electric motor. The screw is free to move in translation but blocked from rotating. The free connection rod is pressed between a base of the primary piston and the screw in order to transmit a thrust of the screw to the primary piston.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: October 29, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Raynald Sprocq, Chris Anderson
  • Patent number: 10435006
    Abstract: A method for checking the braking force in a vehicle includes adjusting a brake piston with a vehicle hydraulic brake that has a braking force booster and with an electromechanical braking device that has a brake motor so as to generate a braking force. The hydraulic braking medium volume that corresponds to the displacement of the brake piston via the brake motor is compared to a hydraulic reference volume.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: October 8, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Frank Baehrle-Miller, Dieter Blattert
  • Patent number: 10259440
    Abstract: A hydraulic vehicle braking system comprises a master cylinder having at least one piston displacably accommodated therein, a mechanical actuator that is coupled, or can be coupled, to a brake pedal for actuating the piston, and an electromechanical actuator. The electromechanical actuator is likewise provided for actuating the piston and can be activated, at least for boosting or generating brake force, when the brake pedal is actuated. Furthermore, a valve arrangement is provided, which has a first valve per wheel brake for selectively uncoupling the wheel brake from the master cylinder, and a second valve for selectively reducing the brake pressure at the wheel brake. The valve arrangement can be controlled at least within the framework of an ABS control mode.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: April 16, 2019
    Assignee: Lucas Automotive GmbH
    Inventor: Leo Gilles
  • Patent number: 10173653
    Abstract: Method and system for determining a pressure/volume characteristic curve of a wheel brake in a motor vehicle brake system having an electrically controllable pressure supply device connected hydraulically to wheel brakes and can output a pressure medium volume for activating the wheel brakes. The pressure medium volume which is output by the pressure supply device can be determined. An electrically actuable inlet valve per wheel brake disconnects the connection between the wheel brake and the pressure supply device. During one or more service brake operations of the motor vehicle wheel brakes are activated by the pressure supply device, the pressure medium volume output by the pressure supply device in order to activate the wheel brakes is determined and the pressure/volume characteristic curves of the wheel brakes are determined on the basis of pressure medium volumes output by the pressure supply device during one or more service braking operations are determined.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: January 8, 2019
    Assignee: Continental Teves AG & Co. oHG
    Inventor: Harald Biller
  • Patent number: 9010362
    Abstract: A pressure control reservoir includes a valve ball and a shaft which is movable to move the valve ball to open or close a fluid path leading to a fluid reservoir chamber. The shaft has a tip with a slant surface which has a peripheral edge of a polygonal shape with even numbers of vertices and is inclined to the longitudinal center line of the shaft. Such a polygonal geometry increases an entire or inclined length of the slant surface, which results in an increased range where an angle which the slant surface makes with a plane extending perpendicular to an axial direction of the tip is permitted to be increased without causing the point of contact between the valve ball and the slant surface to be shifted close to the tip of the slant surface when the tip of the shaft moves the valve ball.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: April 21, 2015
    Assignees: Denso Corporation, Advics Co., Ltd.
    Inventors: Kouji Aoba, Tomoo Harada, Noriaki Asechi, Kazuma Shigeta
  • Patent number: 8936323
    Abstract: A brake apparatus including a housing with a fluid passage, a piston body disposed within a closed-ended bore of the housing and communicated with the fluid passage, a first elastic member biasing the piston body toward a closed end of the bore, a valve element disposed in the fluid passage, a seat portion coming into contact with the valve element, a rod disposed between a crown surface of the piston body and the valve element, a second elastic member biasing the valve element toward the seat portion, a rod supporting hole portion that supports one end side of the rod, a rod outer circumferential passage portion disposed on the other end side of the rod and having an inner diameter larger than an inner diameter of the rod supporting hole portion, and at least one communicating hole portion that communicates the rod outer circumferential passage portion and the bore.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: January 20, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventor: Kazuya Terashima
  • Patent number: 8911030
    Abstract: An electric brake actuator (motor cylinder apparatus) for generating hydraulic brake pressure on the basis of at least an electric signal corresponding to brake manipulation by an operator, which is incorporated in a vehicle brake system with an input apparatus being arranged separately from the electric brake actuator and receiving the brake manipulation. A reservoir reserving brake fluid is attached to a cylinder body included in the electric brake actuator, and the ceiling of the reservoir is inclined from the axis of the cylinder body in correspondence with an arrangement of the main body inclined from the horizontal line.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: December 16, 2014
    Assignees: Honda Motor Co., Ltd., Nissin Kogyo Co., Ltd.
    Inventors: Takaaki Ohnishi, Kazuaki Murayama, Hideo Miyabayashi, Nobuyuki Kobayashi, Yoshiyuki Takamatsu, Motoyasu Nakamura, Yoshiteru Matsunaga
  • Patent number: 8801110
    Abstract: When brake fluid of a first wheel cylinder (39a) of a slave cylinder (23) is increased by supplying the brake fluid to a first wheel cylinder (16, 17) by a first pump (64A), a second piston (38B), which is a free piston, of the slave cylinder (23) moves toward the first fluid pressure chamber (39A) side, the volume of a second fluid pressure chamber (39B) thereby expands, and the brake fluid pressure of a second wheel cylinder (20, 21) can be reduced, whereas when brake fluid pressure of the second fluid pressure chamber (39B) is increased by supplying the brake fluid to the second wheel cylinder (20, 21) by a second pump (64B), the second piston (38B) moves toward the second fluid pressure chamber (39B) side, the volume of the first fluid pressure chamber (39A) thereby expands, and the brake fluid pressure of the first wheel cylinder (16, 17) can be reduced, thus enabling a difference in brake fluid pressure to be freely generated between the first and second wheel cylinders (16, 17).
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: August 12, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kunimichi Hatano, Naoto Ohkubo
  • Patent number: 8783793
    Abstract: A brake apparatus including a piston body disposed in a closed-ended bore in a housing, a first elastic member biasing the piston body toward a closed end of the bore, and a pressure regulating valve including a valve element, a rod and a second elastic member biasing the valve element toward a seat portion and having an elastic force smaller than that of the first elastic member, the brake apparatus having a reservoir function of reserving brake fluid flowed from a vehicular wheel cylinder in the bore by strokes of the piston body upon ABS control, the piston body being a resin-molded member having a hard member on a piston crown surface, the hard member having a hardness larger than that of a resin material of the piston body, and the piston body and the rod are brought into contact with each other via the hard member.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: July 22, 2014
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Kazuya Terashima, Katsuma Tsuruoka, Koji Numakura
  • Patent number: 8733848
    Abstract: A vehicular braking apparatus including a shut-off valve for shutting off, as needed, a flow of oil from a wheel cylinder to a master cylinder; a pressure increase-decrease control valve increasing and decreasing a pressure in the wheel cylinder; a reservoir receiving and storing in a reservoir chamber the oil from the wheel cylinder when the pressure increase-decrease control valve is in a pressure decrease position; a pump sucking in and pressuring the oil from the reservoir chamber and supplying the oil to the wheel cylinder via the pressure increase-decrease control valve when the pressure increase-decrease control valve is in a pressure increase position; and a communication control valve controlling communication between the master cylinder and the reservoir chamber. The communication control valve is a normally-closed valve and is opened by a suction pressure of the pump.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: May 27, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroshi Isono, Yasuji Mizutani
  • Patent number: 8733512
    Abstract: Disclosed is an electric disc brake capable of reducing noise and vibration while expanding the life span of the product. The electric disc brake includes a caliper housing to press friction pads provided at both sides of a disc against the disc, a cylinder installed in the caliper housing, a piston moving back and forth in the cylinder to press the friction pads, a driving device generating driving force with respect to the piston, and a volume compensation part communicated with the cylinder to compensate for an increment of a volume of the cylinder according to movement of the piston.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: May 27, 2014
    Assignee: Mando Corporation
    Inventor: Jin Seok Kim
  • Patent number: 8701407
    Abstract: Disclosed is a hydraulic active booster capable of easily adjusting the structure of a simulator. The simulator of the hydraulic active booster includes a simulator housing having a first receiving part for receiving a control plunger, a second receiving part for receiving a part of a first piston into which the control plunger is inserted, and a third receiving part for receiving a simulator piston. The third receiving part is separated from the first and second receiving parts.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: April 22, 2014
    Assignee: Mando Corporation
    Inventors: Seung Hyup Bae, Chang Bok Ko
  • Patent number: 8434831
    Abstract: A vehicle brake device includes an input shaft coupled to a brake pedal, a pedal operation detector, a pedal simulator coupled to the input shaft in a control housing, a master cylinder, a control piston, a control chamber, and a hydraulic pressure supply, wherein the pedal simulator includes a pedal simulator piston, a pressing member, a simulator piston provided in the pedal simulator piston, and a push rod which is accommodated in the pressing member while being spaced apart from a bottom wall of a guide groove by passing through the pedal simulator piston and the simulator piston from the control piston to the input shaft, and wherein a diameter of the master cylinder is greater than a diameter of the simulator piston, and a diameter of the control piston is greater than a diameter of the master cylinder.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: May 7, 2013
    Assignee: Mando Corporation
    Inventor: I Jin Yang
  • Patent number: 8414089
    Abstract: An externally actuable electrohydraulic vehicle brake system including an externally actuable electrohydraulic vehicle system with slip control. In order to make available a brake system which permits highly dynamic pressure build-up processes without throttling effects in the suction path, in particular through a master cylinder, being adversely affected, it is proposed that the hydraulic pump be assigned means which permit the hydraulic pump additionally to drive a hydraulic charging device which is connected to an inlet of the hydraulic pump.
    Type: Grant
    Filed: August 10, 2007
    Date of Patent: April 9, 2013
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Hans-Jörg Feigel, Dieter Dinkel
  • Patent number: 8342615
    Abstract: A braking system having a master cylinder to which wheel brake circuits (I, II) can be connected, a first piston coupled to a brake pedal, a second piston by means of which the master cylinder is actuated, a third piston actuated by the first piston and connected in a force transmitting fashion to the second piston, a simulation device which gives the driver of the vehicle a pedal sensation, an intermediate space between the second piston and third piston, a pressure generating device which controls the pressure in the intermediate space, a pressure medium reservoir vessel which is under atmospheric pressure and which can be connected hydraulically to the intermediate space, and means for electrically controlling the pressure in the intermediate space.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: January 1, 2013
    Assignee: Continental Teves AG & Co. oHG
    Inventor: Stefan Drumm
  • Patent number: 8333442
    Abstract: When an electrical fluid pressure generator fails and a wheel cylinder is operated by brake fluid pressure generated by a master cylinder, if a first fluid pressure system leading to a rear fluid chamber of the electrical fluid pressure generator fails and is opened to the atmosphere, braking is performed by brake fluid pressure of a second fluid pressure system transmitted from the master cylinder through a front fluid chamber of the electrical fluid pressure generator to a wheel cylinder. At this time, a front supply port, which communicates through a front second cup seal, does not communicate with the master cylinder but with a reservoir. Such configuration prevents leakage of the brake fluid pressure generated by the master cylinder through the front supply port, the front second cup seal and the rear fluid chamber, thereby ensuring braking by the second fluid pressure system.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: December 18, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kunimichi Hatano, Takaaki Ohnishi
  • Patent number: 8328297
    Abstract: In a brake system, two first fluid pressure chambers of a master cylinder respectively communicate with two second fluid pressure chambers of a motor cylinder. The two second chambers communicate with four wheel cylinders through an ABS. The wheel cylinders are operated by brake fluid pressure generated by the master cylinder in an abnormal situation where the motor cylinder is non-operational. The brake system includes two separate independent fluid pressure lines: one line extending from one of the first chambers in the master cylinder to the wheel cylinders via one of the second chambers in the motor cylinder; and the other line extending from the other first chamber in the master cylinder to the wheel cylinders via the other second chamber in the motor cylinder. Thus, even if an abnormality occurs in one of the two fluid pressure lines, a minimum necessary braking force is secured.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: December 11, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventor: Kunimichi Hatano
  • Patent number: 8328298
    Abstract: Disclosed herein is an electro-hydraulic brake system. The electro-hydraulic brake system includes a master cylinder to transmit brake oil, a high-pressure accumulator to transmit brake oil independently of the master cylinder, first and second circuits connected respectively to the master cylinder, at least one first wheel to be braked by the first circuit, and at least one second wheel to be braked by the second circuit. The first circuit is connected to the high-pressure accumulator, to control the first wheel. The second circuit is connected to the first circuit, to control the second wheel.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: December 11, 2012
    Assignee: Mando Corporation
    Inventors: I Jin Yang, Seong Ho Choi
  • 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: 8215724
    Abstract: A pressure regulating reservoir includes, first and second conduits, a reservoir chamber, first and second reservoir ports, a valve portion including a first hydraulic passage, first and second valve bodies, and a valve seat including a second hydraulic passage, a piston portion including a piston and a spring, a mobile member, a protruding portion and a shaft, wherein the first hydraulic passage is closed by the second valve body thereby interrupting the fluid communication when the pump is not actuated, a pressure difference between a brake hydraulic pressure within the reservoir chamber and a brake hydraulic pressure within the first reservoir port is regulated when the pump is actuated while the brake hydraulic pressure is generated by the brake hydraulic pressure generating means, and the second hydraulic passage is opened to establish the fluid communication when the pump is actuated while no brake hydraulic pressure is generated.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: July 10, 2012
    Assignee: Advics Co., Ltd.
    Inventors: Koji Aoba, Kazuma Shigeta, Tomoo Harada
  • Publication number: 20120139333
    Abstract: A brake apparatus including a housing with a fluid passage, a piston body disposed within a closed-ended bore of the housing and communicated with the fluid passage, a first elastic member biasing the piston body toward a closed end of the bore, a valve element disposed in the fluid passage, a seat portion coming into contact with the valve element, a rod disposed between a crown surface of the piston body and the valve element, a second elastic member biasing the valve element toward the seat portion, a rod supporting hole portion that supports one end side of the rod, a rod outer circumferential passage portion disposed on the other end side of the rod and having an inner diameter larger than an inner diameter of the rod supporting hole portion, and at least one communicating hole portion that communicates the rod outer circumferential passage portion and the bore.
    Type: Application
    Filed: November 22, 2011
    Publication date: June 7, 2012
    Inventor: Kazuya Terashima
  • Publication number: 20120139332
    Abstract: A brake apparatus including a piston body disposed in a closed-ended bore in a housing, a first elastic member biasing the piston body toward a closed end of the bore, and a pressure regulating valve including a valve element, a rod and a second elastic member biasing the valve element toward a seat portion and having an elastic force smaller than that of the first elastic member, the brake apparatus having a reservoir function of reserving brake fluid flowed from a vehicular wheel cylinder in the bore by strokes of the piston body upon ABS control, the piston body being a resin-molded member having a hard member on a piston crown surface, the hard member having a hardness larger than that of a resin material of the piston body, and the piston body and the rod are brought into contact with each other via the hard member.
    Type: Application
    Filed: November 22, 2011
    Publication date: June 7, 2012
    Inventors: Kazuya TERASHIMA, Katsuma TSURUOKA, Koji NUMAKURA
  • Patent number: 8167381
    Abstract: A brake fluid pressure control device for a bar handle vehicle has a front wheel brake system which imparts a braking force to a front wheel and a rear wheel brake system which imparts a braking force to a rear wheel. At least one of the brake systems has a master cylinder which generates brake fluid pressure in accordance with an operation amount of a brake operation element, first and second wheel cylinders both of which impart the brake force on one of the front and rear wheels, a first hydraulic path which communicates the master cylinder with the first wheel cylinder, a second hydraulic path which is branched from the first hydraulic path and connected to the second wheel cylinder and a boosting unit which boosts the brake fluid pressure in the second wheel cylinder without boosting the brake fluid pressure in the first wheel cylinder.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: May 1, 2012
    Assignee: Nissin Kogyo Co., Ltd.
    Inventors: Motoyasu Nakamura, Takayuki Hamanaka
  • Patent number: 8096624
    Abstract: A brake control apparatus for a vehicle includes a first calculating portion for calculating a master cylinder pressure, a first determining portion for determining whether or not the brake operation is performed, a second calculating portion for calculating a target wheel cylinder pressure, a third calculating portion for calculating a controlled pressure, a controlling portion for controlling a pressure difference control valve, a second determining portion for determining whether or not the vehicle is stopped, and a driving portion for specifying a drive pattern of a motor to a first motor drive pattern in a case where the vehicle is not stopped, the motor driving a pump for discharging a brake fluid, the driving means specifying the drive pattern to a second motor drive pattern in a case where the vehicle is stopped, the driving means driving the motor based on the motor driving pattern specified.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: January 17, 2012
    Assignee: Advics Co., Ltd.
    Inventors: Hiroaki Niino, Takashi Sato, Yoichi Miyawaki
  • Patent number: 8042883
    Abstract: To provide a brake device for a motor vehicle that can suppress variation in braking force applied to a wheel regardless of variation in friction coefficient between a rotator and a braking means in a fluid pressure brake. A brake device for a motor vehicle is provided with a fluid pressure brake 2 (braking means) that applies brake force according to brake fluid pressure to a brake disk (rotator) 20 fixed to a driving wheel (wheel) 3, and has a first feedback mechanism (pressure-reducing means) 15-1 that applies reaction force inputted from the brake disk 20 to the fluid pressure brake 2 in brake operation in a reducing direction of the brake fluid pressure.
    Type: Grant
    Filed: November 29, 2004
    Date of Patent: October 25, 2011
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Masaki Nakano
  • Patent number: 8025345
    Abstract: A vehicle brake system, capable of realizing a brake-by-wire construction which can be installed in vehicles in the same manner as conventional brake systems, is provided with a booster device, a master cylinder, wheel brakes, and a hydraulic pressure control device interposed between the master cylinder and the wheel brakes. The system is further provided with a stroke sensor for detecting the moving stroke of a brake pedal, a simulator for applying to the brake pedal a pseudo reaction force corresponding to the moving stroke of the brake pedal, a play or idling component arranged between the booster device and the hydraulic pressure control device for absorbing the moving stroke of the brake pedal by a predetermined amount, and an electronic control device for controlling the hydraulic pressure control device based on an input from the stroke sensor.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: September 27, 2011
    Assignee: Advics Co., Ltd.
    Inventors: Koichi Hashida, Yusuke Morikawa, Masayuki Naito, Koichi Kokubo
  • Patent number: 8002066
    Abstract: A motorcycle includes a seat configured to support a rider, and an antilock braking modulator disposed downwardly of the seat. The antilock braking modulator is configured to control an antilock braking system (ABS). A first control valve is configured to distribute a braking force between a front wheel and a rear wheel. A second control valve is configured to introduce fuel vapors into an intake system. A first bracket is fixed on a vehicle body frame, and is mounted with the second control valve. A second bracket is supported on a side of the vehicle body frame and further supported by the first bracket and mounted with the antilock braking modulator and the first control valve.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: August 23, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventor: Dai Harada
  • Patent number: 7762632
    Abstract: A connecting structure between two passages includes a connecting sleeve including a large-diameter portion and a small-diameter portion with a shoulder surface defined therebetween. A recess is formed in the shoulder surface at its radially inner portion. When the connecting sleeve is inserted into a connecting hole formed in a mating member with a seal member fitted on the small-diameter portion, the seal member is radially compressed and is allowed to swell not only in the direction in which the connecting sleeve is inserted but toward the shoulder surface because the shoulder surface is formed with the recess. This prevents the force that tends to axially slide the radially inner portion of the seal member, thus preventing inclination of the seal member.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: July 27, 2010
    Assignee: Advics Co., Ltd.
    Inventor: Kazuo Yasui
  • Patent number: 7748792
    Abstract: A brake-by-wire automotive braking system includes a master cylinder connected to a number of wheel cylinders, with the master cylinder being actuated by a brake pedal assembly operatively connected with a master cylinder force simulator simulating the resistive force/displacement characteristics of the master cylinder itself. An electronically controlled compliance device selectively immobilizes the master cylinder force simulator so that the resistive force provided by the simulator may be applied selectively to the brake pedal. This produces a transparency in the brake pedal's operational feel, notwithstanding the presence or absence of force provided by the master cylinder force simulator.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: July 6, 2010
    Assignee: Ford Global Technologies
    Inventors: Dale S. Crombez, Daniel A. Gabor
  • Patent number: 7731304
    Abstract: The invention relates to an electronically regulatable vehicle brake system with traction control, in which a master cylinder is connected indirectly via a hydraulic unit to at least one wheel brake. The hydraulic unit has electromagnet valves and an externally triggerable pressure generator, for modulating the wheel brake pressure, optionally independently of the driver. For preventing wheel slip, the pressure generator is connected by its intake side to an intake conduit, among other things, that is controllable by an intake valve. To enhance the dynamics and improve the regulatability of a vehicle brake system, a self-aspirating pressure fluid storage unit is connected to the intake conduit and makes an aspiration volume available to the pressure generator.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: June 8, 2010
    Assignee: Robert Bosch GmbH
    Inventors: Bernd Groll, Guenther Schnalzger
  • Patent number: 7644997
    Abstract: A fill-up device of a master cylinder is included in a hydraulic brake system for an automotive vehicle and generates a hydraulic pressure corresponding to an operation of a brake operating member. A coupled switching valve is switched by being mechanically coupled with movement of a piston relative to a housing. The coupled switching valve is in a first state where a fill-up chamber is in communication with a reservoir via a relief valve until the piston is advanced by a predetermined distance from a rearmost position, and switched to a second state where the fill-up chamber is in direct communication with the reservoir via the communication passage without the relief valve disposed therebetween when the piston is advanced by a distance larger than the predetermined distance. Thus, the hydraulic pressure in the fill-up chamber rapidly decreases, and the hydraulic pressure in pressure chambers rapidly increase.
    Type: Grant
    Filed: June 15, 2005
    Date of Patent: January 12, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Hiroshi Isono
  • Publication number: 20090302675
    Abstract: A brake apparatus includes multiple wheel cylinders; multiple maintaining valves; a pressure-regulating control valve; and a control unit that controls the upstream pressure by switching a pressure-control mode between a pressure-regulating mode which is selected when a deviation of the upstream pressure from a target pressure is outside a setting range and in which the upstream pressure is brought to the target pressure using the pressure-regulating control valve and a pressure-maintaining mode that is selected when the deviation is within the setting range. The control unit opens the pressure-regulating control valve before the pressure-control mode is switched from the pressure-maintaining mode to the pressure-regulating mode.
    Type: Application
    Filed: September 3, 2008
    Publication date: December 10, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroshi Nakaoka, Yoshito Tanaka
  • Patent number: 7543896
    Abstract: A pressure regulating reservoir is structured such that a major diameter portion of a shaft contacts a bottom surface of a valve seat, whereas a top surface of a piston does not contact an upper end surface of a wall forming a reservoir chamber in a housing. Therefore, a lift amount of a ball valve can be set using a portion above the major diameter portion of the shaft that contacts the bottom surface of the valve seat. That is, the lift amount can be set using only a dimension in the axial direction of a minor diameter portion of the shaft.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: June 9, 2009
    Assignee: Advics Co., Ltd.
    Inventors: Fumiyoshi Ariki, Shin Sasaki
  • Patent number: 7497527
    Abstract: A reshaping device according to the invention has at least one ejector, for example, in the form of a cylinder pin (11) which is shifted by the workpiece (6) against the pressure from a pressure storing cylinder (17) or other suitable energy storing device before and/or during the reshaping of the workpiece (6). The workpiece ejection occurs by the work stored in the energy storing device.
    Type: Grant
    Filed: August 9, 2005
    Date of Patent: March 3, 2009
    Assignee: Schuler Pressen GmbH & Co. KG
    Inventor: Jürgen Fahrenbach
  • Patent number: 7461907
    Abstract: An improved seal/bearing arrangement employs an O-ring type seal which has segmented fingers. The seal ring has a recess which is sized to mate with a corresponding projecting lug of a bore use, for example, in brake actuator mechanisms. The seal ring can be made from synthetics such as polyamides and polyethylenes. The fingers are so arranged that locking of the seal rings in the bore occurs with insertion of a sliding, oscillating and/or rotating shaft or the like through the rings.
    Type: Grant
    Filed: July 18, 2005
    Date of Patent: December 9, 2008
    Assignee: Bendix Spicer Foundation Brake LLC
    Inventors: Ronald S. Plantan, Kenneth E. Scheckelhoff
  • Publication number: 20080191548
    Abstract: Apparatus including a brake control assembly having a brake fluid accumulator assembly. The brake fluid accumulator assembly includes a brake fluid orifice, at least one brake-fluid-accumulating piston bore, a controllable bi-directional motor, and at least one piston. The brake fluid orifice is fluidly connectable to a brake apply master cylinder and is fluidly connectable to a wheel brake. The at-least-one brake-fluid-accumulating piston bore is fluidly connected to the brake fluid orifice. The motor has a first motor driving direction and an opposite second motor driving direction. The at-least-one piston is each positioned in and slidable within a corresponding brake-fluid-accumulating piston bore and is each movable by the motor, in the first motor driving direction, to move in compression within the corresponding brake-fluid-accumulating piston bore.
    Type: Application
    Filed: February 13, 2007
    Publication date: August 14, 2008
    Inventors: James R. Bond, Daniel N. Borgemenke, Matthew A. Cukovecki, Earl Wayne LLoyd, Jerry L. Newton
  • Patent number: 7410223
    Abstract: A hydraulic brake device includes a hydraulic pressure supply passage for reducing the output hydraulic pressure by a first proportional solenoid valve and supplying it to a hydraulic passage leading from a pressure adjusting valve to the wheel cylinders, a second proportional solenoid valve disposed between the hydraulic pressure supply passage and the pressure adjusting valve for reducing the hydraulic pressure supplied from the hydraulic pressure supply passage, and a check valve parallel to the second proportional solenoid valve. Hydraulic pressure control during automatic brake control is carried out by the first and second proportional solenoid valves.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: August 12, 2008
    Assignee: Advics Co., Ltd.
    Inventors: Akihito Kusano, Satoshi Ishida
  • Publication number: 20070228817
    Abstract: A vehicular brake hydraulic pressure control device of the invention includes accumulators that are connected to a first brake pedal L1 and store brake fluid with a first master cylinder MC1 at atmosphere, a first brake system K1 that is operable to apply interlock control to a front wheel brake F of a second brake system K2, and a switching unit 6 that switches channels of brake fluid flowing to the first hydraulic pressure output channel D1 of the first brake system, from the first master cylinder MC1 to the accumulators 7, 8 when a pump 24 is in operation.
    Type: Application
    Filed: March 30, 2007
    Publication date: October 4, 2007
    Applicant: NISSIN KOGYO CO., LTD.
    Inventors: Tetsuo Tsuchida, Motoyasu Nakamura
  • Publication number: 20070228818
    Abstract: A vehicular brake hydraulic pressure control device has a first operation unit T1 including a first brake operation element; a first brake system K1 for braking a first wheel brake R corresponding to the first operation unit T1; and a first control valve unit A and B for controlling brake hydraulic pressure in the first brake system. In the device, the first operation unit T1 and the first brake system K1 are separated so as not to flow a brake fluid, and the device further comprises a brake fluid tank 30 having a reservoir function for supplying the brake fluid to the separated first brake system K1.
    Type: Application
    Filed: March 30, 2007
    Publication date: October 4, 2007
    Applicant: NISSIN KOGYO CO., LTD.
    Inventors: Tetsuo Tsuchida, Motoyasu Nakamura
  • Patent number: 7261382
    Abstract: A reservoir tank has an inlet/outlet port communicating with a master cylinder, and a hydraulic fluid supply port provided directly opposite the inlet/outlet port. A tubular portion is provided on the inner surface of the tank. The tubular portion has an internal passage communicating with the inlet/outlet port and having a top opening. A box-shaped member has its bottom plate fitted on the tubular member. The bottom plate is formed of a filter material. A deflector plate is supported on legs extending upwardly form the bottom plate of the box member so as to be disposed right over the top opening of the tubular portion. The deflector plate deflects the flow of hydraulic fluid such that it will not be directed toward the hydraulic fluid supply port, thereby preventing hydraulic fluid from being blown out through the hydraulic fluid supply port even if this port is open.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: August 28, 2007
    Assignee: Advics Co., Ltd.
    Inventor: Mitsuharu Hayashi
  • Publication number: 20070176486
    Abstract: A hydraulic pressure brake unit includes a power hydraulic pressure source able to generate, by a supply of power, a high hydraulic independent of a brake operation by a driver; a field system which connects the power hydraulic pressure source with both first and second wheel cylinders, regulates the hydraulic pressure of operating fluid from the power hydraulic pressure source, and applies a common hydraulic pressure to both the first and second wheel cylinders; a separator valve provided so as to be able to cut off the supply of operating fluid to the second wheel cylinder via the first system; and a second system which connects the second wheel cylinder with the power hydraulic pressure source such that operating fluid can be supplied front the power hydraulic pressure source to the second wheel cylinder regardless of weather the separator valve is open or closed.
    Type: Application
    Filed: December 29, 2006
    Publication date: August 2, 2007
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Eiji NAKAMURA
  • Patent number: 7232190
    Abstract: A tank according to the invention comprises a casing, a filling port (5) extending, on the outside of said tank, into a filling neck (7), which is provided with a screw thread having a pitch (p) and which cooperates with a cap (9). The inner surface of the cap cooperating with the screw thread, at least one outlet port for the hydraulic-fluid flow towards a hydraulic circuit. The inner space (3) of the tank is connected with ambient air through two channels (45), that extend from a first lengthwise end (47) of the filling neck (7) to a second lengthwise end (49) of the filling neck (7) and through a helical passage (41) between the filling neck (7) and the cap (9) to connect the inside of the tank with the ambient air to avoid the development of negative pressure in the tank.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: June 19, 2007
    Assignee: Robert Bosch
    Inventors: Emmanuel Fraisse, François Gaffe
  • Patent number: 7188913
    Abstract: A vehicular motor-driven brake apparatus includes an open circuit in which reciprocation of a master cylinder generating a brake pressure is caused by an actuator that operates according to a pedal operation amount, and brake fluid discharged from a wheel cylinder during pressure decrease is directly returned to a master reservoir subject to atmospheric pressure. A fluid amount replenishment control is executed during pressure increase of the master cylinder in which a master stroke is returned for only a predetermined time by operation of the actuator, and thus brake fluid is sucked up from the master reservoir to the master cylinder. Accordingly, when an ABS control continues for a long time period, even if the brake pedal is being depressed, reduced pressure brake fluid in the master cylinder is sucked up. Therefore, there is no limit to pressure decrease, and bottoming-out of the master cylinder does not occur.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: March 13, 2007
    Assignee: Advics Co., Ltd
    Inventors: Takahisa Yokoyama, Takayuki Takeshita, Haruo Arakawa
  • Patent number: 7104612
    Abstract: A brake hydraulic pressure generator is proposed which is simple in structure and can suppress fluctuations in the brake pedal operating amount due to fluctuations in the amount of brake fluid consumed in the brake circuit. The brake hydraulic pressure generator includes an input shaft operated by a brake pedal, a stroke simulator for imparting a stroke and a reaction force corresponding to the brake pedal operating amount to the input shaft, a master cylinder for generating brake hydraulic pressure, and a pressure detector member for applying a reaction force corresponding to the hydraulic pressure in the master cylinder to a valve member of the control valve. The reaction force is transmitted through the pressure detector member to the control member. The input to the brake pedal is transmitted to the control valve through the stroke simulator so as to oppose the reaction force. The control valve operates to balance the reaction force and the input.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: September 12, 2006
    Assignee: Advics Co., Ltd.
    Inventors: Tadashi Terazawa, Yoji Inoue
  • Patent number: 6988778
    Abstract: A pneumatic brake booster for use in a motor vehicle having a feeler (42) mounted to slide on a plunger (32) located at the end of a control rod (22) and pivoting key (62) for axially blocking the movement of the feeler (42) with respect to the plunger (32) during a normal brake application and unblocking the movement during an emergency brake application to reduce the length of a plunger-feeler assembly and thus increase the jump phase of an output force.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: January 24, 2006
    Assignee: Robert Bosch GmbH
    Inventor: Juan Simon Bacardit
  • Patent number: 6910745
    Abstract: In a check valve of the present invention, when a pressure action direction of a fluid on a valve body is assumed to be X, a spring receiving surface that abuts with a seat surface that is at one end in an axial direction of the helical compression spring is made to incline with respect to a surface perpendicular to the pressure action direction X. Accordingly, an urging force of the helical compression spring on the valve body acts obliquely with respect to the pressure action direction X. Thus the valve body is pressed to a side wall surface when the valve is opened, and vibration of the valve body is inhibited. Accordingly, it is possible to embody the invention with an extremely simple structure in which the spring receiving surface is inclined with respect to the surface perpendicular to the pressure action direction X.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: June 28, 2005
    Assignee: Advics Co., Ltd.
    Inventors: Shozo Inage, Kaneyoshi Nagatani, Koji Yanai, Nobuhiko Yoshioka
  • Publication number: 20040239176
    Abstract: The master cylinder comprises a body (12) defining a primary pressure chamber (14) and a secondary pressure chamber (16), separated by a secondary piston (20); means (24) for the hydraulic connection of the primary pressure chamber (14) with braking-force simulation means (26); moving and stationary means (28, 30) for the sealing of the hydraulic connection means (24) and borne by the secondary piston (20) and the body (12) respectively. The piston (20) is axially movable between a rest position, in which the moving and stationary sealing means (28, 30) are spaced apart from each other, and a position in which said moving and stationary sealing means (28, 30) are cooperating with each other. A moving stop (34) and a stationary stop (32), borne by the secondary piston (20) and the body (12) respectively, cooperate with each other so as to define, the rest position of the secondary piston (20).
    Type: Application
    Filed: March 19, 2004
    Publication date: December 2, 2004
    Inventors: Nathalie Beccafico, Jean-Pierre Delage, Stephane Manfredini, Yanniok Nen
  • Publication number: 20040124698
    Abstract: A hydraulic brake apparatus includes a brake master cylinder having a rod piston moving in response to a brake pedal; a separation valve provided in a hydraulic brake circuit in order to establish and shut off communication between the brake master cylinder and the brake wheel cylinders; a pressure control valve unit for controlling fluid pressure to be supplied from an external fluid-pressure supply source to the brake wheel cylinders while the separation valve is in a shutoff condition; and a stroke simulator mechanism for allowing an idle stroke of the rod piston so as to ensure a stroke of the brake pedal in accordance with an input load to the brake pedal. An orifice is provided in a passage which establishes, during the idle stroke of the rod piston, communication between a pressure chamber and an atmospheric pressure chamber which are defined within the brake master cylinder by means of the rod piston.
    Type: Application
    Filed: December 12, 2003
    Publication date: July 1, 2004
    Applicant: ADVICS CO., LTD.
    Inventors: Nobuyuki Nakashima, Atsushi Yasuda
  • Publication number: 20030214180
    Abstract: An improved hydraulic brake system for a vehicle is proposed which includes a hydraulic pressure supply unit for supplying hydraulic pressure from a pressure adjusting valve or an hydraulic pressure source to a pressure chamber of a master cylinder. In this type of brake system, when the hydraulic pressure supply unit is activated, the master piston of the master cylinder could retract to its original position, thus bringing the master pressure chamber into communication with the atmospheric reservoir. If this happens, the master cylinder pressure output will be lost completely. An inexpensive solution to this problem is proposed. A piston retraction restricting member is provided in a pressure chamber for applying pressure to the master piston.
    Type: Application
    Filed: May 15, 2003
    Publication date: November 20, 2003
    Applicant: ADVICS CO., LTD.
    Inventor: Akihito Kusano