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Jidosha Kiki Co., Ltd. Patents
Assignee:
Jidosha Kiki Co., Ltd.
Address:
Tokyo, JP
No. of patents:
345
Patents:


1 2 3 4 5 6 7










Patent Number Title Of Patent Date Issued
6513416 Brake system February 4, 2003
A hydraulic-pressure counter-force mechanism 37 which produces a counter force when a brake booster is operated is made up of an input-side member 38 slidable disposed within a valve body 3, a second constant-pressure chamber 39 formed on the rear side of the input-side member and into w
6332391 Automatic brake booster December 25, 2001
In an automatic brake booster, a sleeve 18 constituting a valve mechanism 15 has a drive portion 50 disposed on the front side, a valve portion 51 forming a second valve seat 19, a mating portion 52 for mating with a valve seat portion when the drive portion is moved forward, and a conic
6280150 Variable displacement pump August 28, 2001
A cam case 23 is provided which swingably supports a cam ring 34 fitted to a rotor 33 having a vane 33a to form a pump chamber 36 from the outer surface such that the cam ring 34 is swingably supported by a swingable pin 35 disposed in the axial direction as a fulcrum, the cam case 23
6273526 Fluid pressure booster and brake system using the same August 14, 2001
In a fluid pressure booster, an input rod 7 and a valve member 6 are stroked forward during the operation so as to cause a control valve to be switched over. The atmosphere is introduced into a working pressure chamber 30 via the control valve 41 and a power piston 19 then operates to
6267566 Oil pump July 31, 2001
An oil pump includes pump constituent elements, a pump body, and a driving shaft. The pump constituent elements define a pump chamber between a rotor and a cam ring that houses the rotor. The pump body is constituted by a front body and a rear body. The front body defines a housing space
6244049 Brake system June 12, 2001
A counter-force mechanism (37), which produces a counter force when a brake booster is operated, is made up of an input-side member (38) slidably disposed within a valve body (3), a second constant-pressure chamber (39) formed on the rear side of the input-side member and into which a pr
6216580 Reaction mechanism for booster April 17, 2001
In accordance with the invention, a booster is not provided with a mechanism which transmits a braking reaction, and accordingly, a reaction cannot be transmitted to a brake pedal. On the other hand, a pseudo-reaction imparting means is provided to impart a pseudo-reaction which depe
6209441 Brake booster April 3, 2001
A brake booster includes reaction transmitting means comprising a first and a second retainer, a coiled spring disposed between the both retainers, and a stop which prevents the both retainers from being spaced from each other beyond a given distance. The brake booster also includes a va
6205905 Brake booster March 27, 2001
Reaction transmitting means of a brake booster includes a parallel combination of a first and a second reaction transmitting path each transmitting a brake reaction from a reaction disc to a valve plunger. The first reaction transmitting path includes a spring charged to a preset loa
6192783 Brake booster February 27, 2001
A brake booster which permits a booster ratio to be changed in two stages. A first spring 25 is disposed between a first plunger plate 24 and the bottom of a stowage 8A of a valve plunger 8. Toward its front end, the outer periphery of the first plunger plate 24 slidably extends through
6164184 Reaction mechanism for booster December 26, 2000
In accordance with the invention, a booster is not provided with a mechanism which transmits a braking reaction, and accordingly, a reaction cannot be transmitted to a brake pedal. On the other hand, a pseudo-reaction imparting means is provided to impart a pseudo-reaction which depe
6164070 Hydraulic pressure type booster December 26, 2000
The collar 13 for slidably supporting and guiding a valve body of the control valve 55 of the hydraulic pressure type booster 1 is press-fitted into the small diameter portion 9a of the stepped hole 9 of the power piston 8. The valve seat member 10 of the control valve 55 is also pre
6161464 Brake booster December 19, 2000
A brake reaction which occurs as a brake booster is actuated is prevented from being transmitted to a brake pedal, and instead pseudoction reaction imparting means 41 is provided to transmit a pseudo-reaction to the brake pedal. A valve body 5 and a power piston 3 are capable of relative
6161380 Hydraulic pressure boosting apparatus December 19, 2000
A booster 3 has a structure that a return valve 14 is formed into a two-step throttle incorporating a first throttle valve 36 and a second throttle valve 37 formed continuously from the first throttle valve 36. When a valve spool 28 has been moved forwards when the operation is perfo
6155156 Brake booster December 5, 2000
A brake booster includes a solenoid disposed within a valve body. When the solenoid is energized under the inoperative condition of the brake booster, a piston associated with the solenoid is moved to its operative position to close a vacuum valve while opening an atmosphere valve. This
6135577 Pump operation control apparatus for hydraulic brake boosting system October 24, 2000
In a pump operation control apparatus for a hydraulic brake boosting system, an ECU 13 is provided with a timer 16 to which an output signal from a brake switch 12 is supplied and a pump-operation-control-signal generating means 17 for transmitting a signal for operating and controll
6132012 Abnormal condition detecting apparatus and safety apparatus for hydraulic brake boosting system October 17, 2000
If a determination is made by a pressure gradient comparison means 24 that gradient of the rise in the pressure in an accumulator calculated by a pressure gradient calculating means 21 and realized during the operation of a pump is lower than a predetermined level, occurrence of an abnor
6119577 Brake booster September 19, 2000
A tandem brake booster includes a solenoid within a valve body, and the solenoid may be energized to move a first tubular member disposed on the valve body rearward. When an input shaft is driven forward in the inoperative condition of the brake booster, a vacuum valve is closed while
6089140 Brake booster July 18, 2000
A brake booster which permits an axial relative movement between a power piston and a valve body is disclosed. An arrangement is made which prevents a brake reaction from being transmitted to a brake pedal. As an alternative therefor, pseudo-reaction imparting means transmits a pseud
6082241 Automatic brake booster July 4, 2000
An automatic brake booster includes a solenoid which drives a plunger, forming part of a valve mechanism, forward to switch a flow path in the valve mechanism, separately from an input shaft. A piston is mounted on the plunger, and the atmospheric pressure is introduced into an atmos
6079955 Variable displacement pump June 27, 2000
A cam case 23 is provided which swingably support a cam ring 34 fitted to a rotor 33 having a vane 33a so as to form a pump chamber 36 from the outer surface such that the cam ring 34 is swingably supported by using a swingable pin 35 disposed in the axial direction as a fulcrum, the cam
6050653 Electrically controlled braking system April 18, 2000
An electrically controlled braking system allows a pedal stroke produced by an operation of a brake pedal to be detected by a stroke sensor and to be input to a controller, which in turn controls a brake pressure generated by a brake pressure generator in accordance with the magnitude of
6042199 Anti-skid brake control system with vacuum driven pump March 28, 2000
In case of reducing pressures according to an ABS of the present invention, solenoid valves 14, 15 are turned on and the pressure difference between chambers 24, 23 of a vacuum booster 4 becomes smaller, thereby reducing the brake pressures. Further, solenoid valves 7, 9 are turned on so
6037568 Glow plug for diesel engine with ptc control element disposed in small-diameter sheath section a March 14, 2000
A glow plug for a diesel engine includes a heat generating coil, a control coil, a sheath, an electrode rod, and a housing. The heat generating coil serves as a heater element. The control coil is connected in series with the heat generating coil and serves as a controller for controllin
6027178 Brake system February 22, 2000
In a brake system, when a braking force tends to be insufficient, a first switching valve is set at an interrupting position to render a control chamber in a sealed state, and a pump is actuated to render a supplemental pressure-regulating valve in operation. Thus, MCY pressure supplied
6025579 Ceramic heater and method of manufacturing the same February 15, 2000
A ceramic heater includes a heating element and a sintered body. The heating element is formed of a material containing one of a refractory metal having a melting point of 2,000.degree. C. or more, and a material including an inorganic conductive material. The sintered body of an ins
6008600 Control method and control apparatus for electric power pump type power steering system December 28, 1999
A method is provided for controlling an electric power pump type power steering system. In this method, there are provided a brushless motor (1) rotating, when a current is fed to coils, for driving a hydraulic pump of an automotive vehicle, thereby obtaining an assist power; a plurality
6003426 Reaction mechanism for booster December 21, 1999
In accordance with the invention, a booster is not provided with a mechanism which transmits a braking reaction, and accordingly, a reaction cannot be transmitted to a brake pedal. On the other hand, a pseudo-reaction imparting means is provided to impart a pseudo-reaction which depe
6003425 Booster December 21, 1999
A plurality of axially extending ribs are formed in the inner periphery of a valve body at its front end for slidably supporting the outer peripheral surface of the output shaft at its rear end. With this arrangement, any dimensional error which may occur in the region of the ribs can be
5984428 Brake fluid pressure control valve November 16, 1999
The present invention provides a brake fluid pressure control valve having a plunger 23 slidably fitted in a cylinder hole 22 in a cylinder housing 21 and a retainer 24 which holds the posture of the plunger 23 and seals one end of the cylinder hole 22 by using an O-ring 31 serving as a
5947566 Brake booster system September 7, 1999
In a brake booster system of the present invention, just after a MCY produces MCY pressure Pi according to the pedal pressure of a brake pedal, a valve piston of a pressure-intensifying valve moves so that a valve portion is seated in a rubber valve seat. In addition, a pedal switch
5943938 Brake booster August 31, 1999
A rubber damper is disposed between a valve plunger, which forms a valve mechanism of a brake booster, and a plate plunger. An air gap is defined around the outer and the inner periphery of the rubber damper to permit an elastic deformation of the rubber damper. When a brake pedal is fur
5924285 Master cylinder tank July 20, 1999
An object of the present invention is to provide a master cylinder which decreases the number of necessary parts, achieves easy assembly and stabilized quality, and surely prevents a float from coming off. In the present invention, the master cylinder tank 20 contains working fluid in
5924284 Hydraulic boosting device July 20, 1999
In a hydraulic boosting device of the present invention, when the pressure stored in an emergency accumulator is less than a set pressure, a stepped piston 70 moves downward, a throttle valve 72 is set in a first position where the throttle valve 72 is seated in a valve seat 71, and hydr
5907990 Brake booster having a reaction force mechanism June 1, 1999
An improvement of a reaction transmitting mechanism for a booster is disclosed. A spring charged to a preset load is disposed between a stepped end face of value body and a plunger plate to urge the latter forwardly. This separates the plunger plate and a value plunger from each other in
5895209 Variable capacity pump having a variable metering orifice for biasing pressure April 20, 1999
A variable capacity pump includes a rotor, a plurality of vanes, a cam ring, a spring, a variable orifice, first and second fluid pressure chambers, and first and second openings. The spring biases the cam ring to a position where a volume of the pump chamber of a portion ranging from a
5893316 Brake booster April 13, 1999
A brake booster includes a reaction transmitting means which includes a spring that is compressed when a brake reaction from a reaction disc exceeds a preset load. A holder is mounted on a valve body, and a brake reaction which is transmitted from the reaction disc is accepted by the
5890363 Brake-pressure producing device April 6, 1999
In a brake-pressure producing device of the present invention, a power piston 10 of a hydraulic booster 2 comprises a stepped piston including a large-diameter portion 10a on which fluid pressure of a power chamber 30 is exerted and a small-diameter portion 10b having the same diameter a
5878576 Master cylinder March 9, 1999
The present invention discloses a master cylinder MC, which comprises a body section 2, a cap 3, a cylinder housing 1 composed of the body section 2 and the cap 3, a sleeve 8 fitted in the cylinder housing 1, primary and secondary pistons 4 and 5 provided to be guided by the sleeve 8 and
5878573 Hydraulic brake system March 9, 1999
In a hydraulic brake system of the present invention, the communication between a power chamber 30 of a hydraulic booster 2 and wheel cylinders (WCY) 58, 59 is allowed by a switching valve 64 when fluid pressure of an accumulator (ACC) 46 exceeds predetermined pressure. During braking
5862736 Connection structure between brake booster and control valve January 26, 1999
The invention relates to a connection structure between a brake booster and a control valve which selectively introduces a negative pressure or an atmosphere into the booster. A brake booster of tandem type includes a front shell on which a pair of bosses are connected so as to extend
5829547 Power steering apparatus with pump driven by pulse width modulated controlled, brushless d.c. el November 3, 1998
An electric motor for driving an oil pressure pump which feeds pressurized oil to a power cylinder comprises a brushless d.c. motor. An onboard main battery comprises a main battery which is onboard an electrically driven vehicle and which is constructed as a high tension d.c. voltage so
5823089 Booster October 20, 1998
An improvement of a booster as may be used in a brake of an automobile is provided. The booster is provided with pseudo-reaction imparting means (spring) which imparts a pseudo-reaction which depends on the travel of an input shaft to the input shaft. An arrangement is made in accordance
5819633 Reaction mechanism for brake booster October 13, 1998
According to the invention, a first spring abutment which extends radially outward is formed on a valve plunger, which forms part of a reaction mechanism for brake booster. A second spring abutment which extends radially outward is formed on a plate plunger. A plurality of coiled spr
5802952 Reaction mechanism for booster September 8, 1998
According to the invention, the booster is not provided with a brake reaction transmission mechanism, and hence a reaction cannot be transmitted to a brake pedal. On the other hand, a pseudo-reaction imparting means is provided to impart a pseudo-reaction of suitable magnitude which
5802951 Brake booster September 8, 1998
A brake booster is disclosed which functions as an automatic brake as required. Bellows is disposed within a constant pressure chamber of the brake booster, and has a front end which is connected, by a first support member, to a bulge which is formed in the axial portion of a shell. A se
5794506 Reaction mechanism for brake booster August 18, 1998
A valve plunger, which forms part of a reaction mechanism of a brake booster, comprises a plunger member and a valve side member which are disposed to be slidable relative to each other, with a first spring disposed therebetween. A piston is slidably disposed within a valve body, and
5791227 Control valve August 11, 1998
A control valve is disclosed which is capable of supplying a required control pressure to an actuator such as a brake booster, for example. The control valve includes a valve mechanism within a housing, and the valve mechanism comprises a piston which is associated with a solenoid. When
5779329 Emergency brake system sensing pedal speed and pressure July 14, 1998
An electronic controller of the invention judges whether the pedaling speed exceeds a threshold and a pedal pressure exceeds a threshold based on detected signals from a stroke sensor and a pressure sensor. When the electronic controller judges that the pedaling speed exceeds the thresho
5761983 Output shaft of booster June 9, 1998
An improvement of an output shaft of a booster is disclosed. An output shaft 23 is formed by a push rod 24 and an adjusting screw 25. The push rod 24 is formed with an axial bore 26 in its distal end, the axial bore including a portion 26b of a reduced diameter which is less than an oute
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