When a brake ECU is started up rapidly by a brake pedal operation, the brake ECU executes a depression force fluid pressure mode. When the control pressure detected by a control pressure sensor becomes smaller than a switching determination threshold value, the brake ECU determines that an operation of returning a brake pedal is being performed, and switches the braking mode from the depression force fluid pressure mode to a normal control mode. Accordingly, even when the operation of a stroke simulator has been started, no uncomfortable feeling is given to a driver. Further, even when the operation of returning the brake pedal is not being performed, the braking mode is switched from the depression force fluid pressure mode to a simulator non-operation control fluid pressure mode when a vehicle starts to travel. Consequently, desired braking force can be rapidly generated.

Brake control device

A brake device for a vehicle is provided in which when a slave cylinder generates a brake fluid pressure that is commensurate with the actual amount of operation of a brake pedal by a driver in a state in which a master cut valve is closed and a fluid path connecting a master cylinder to the slave cylinder is cut off, a wheel cylinder is actuated by the brake fluid pressure. Since deterioration determination means determines a leak in the downstream of the slave cylinder based on the actual amount of actuation of the slave cylinder detected by a slave cylinder stroke sensor and the actual brake fluid pressure generated by the slave cylinder and detected by a fluid pressure sensor, it is possible to rapidly determine a leak in the downstream of the slave cylinder.

Brake device for vehicle

A controller includes a target fluid amount calculation module 31 which obtains target fluid amounts for wheel brakes based on target hydraulic pressures which are set in a target wheel brake pressure setting module 30, an actual fluid amount calculation module 32 which obtains actual fluid amounts for the wheel brakes based on hydraulic pressures brake hydraulic pressure detectors, and a target flow rate calculation unit 34 which obtains target flow rates for the wheel brakes based on the actual fluid amounts obtained in the actual fluid amount calculation module 32 and controls the operation of a hydraulic pressure control unit based on the target flow rates obtained in the target flow rate calculation unit 34.

Vehicle brake hydraulic pressure control system

The invention relates to a control device (100) for a vehicle brake system, comprising a valve control unit designed to define, at least taking into account a supplied data signal regarding a generator braking moment currently applied or to be applied by a generator, a first desired state of a first valve (88) of the brake system, said first valve (88) being connected to a master cylinder (62) of the brake system and to a fluid storage unit of the brake system in such a way that a volume of brake fluid can be displaced from the master cylinder (62) into the fluid storage unit via the first valve (88) that has been moved in a controlled manner into an at least partly open state, and output a first control signal (14) corresponding to the first desired state to the first valve (88), said first desired state being definable for a valve (88) acting as the first valve (88) which is connected, via at least one suction line (89), to a brake fluid reservoir (61) of the brake system acting as the fluid storage unit. The invention further relates to a method for operating a vehicle brake system.

Control device for a vehicle brake system and method for operating a vehicle brake system

The present invention relates to a braking system for a vehicle comprising a main brake cylinder (22) for providing a pressure signal, a brake medium reservoir (24) connected to the main brake cylinder (22), and a first brake circuit (14) coupled to a first input to the main brake cylinder (22) and to a second input to the brake medium reservoir (24), comprising at least one first wheel brake cylinder (62a, 62b) located at a first wheel (16a, 16b) for the exertion of a force onto the first wheel (16a, 16b), said force being relative to the pressure signal, a separating valve (60) located between the first input and the first wheel brake cylinder (62a, 62b) for the prevention of the forwarding of the pressure signal upon receipt of an issued closing signal, and a control valve (64) located between the second input and the first wheel brake cylinder (62a, 62b) for controlling an influx of a brake medium from the brake medium reservoir (24) to the first wheel brake cylinder (62a, 62b). The invention also relates to a method for controlling such a brake system.

Braking system and method for controlling a braking system

PROBLEM TO BE SOLVED: To make operation feeling better by securing an operation stroke of a brake operation member at the time of regenerative and cooperative brake control in a braking hydraulic pressure control device for a vehicle capable of executing the regenerative and cooperative brake control controlling the braking hydraulic pressure of a wheel braking mounted to a driving wheel so as to reduce the amount of frictional braking by the amount of the regenerative braking torque in reducing the speed. SOLUTION: In the braking hydraulic pressure control device for the vehicle, a stroke absorbing means 21A where a reservoir 12 and a control valve 22 for adjusting the stroke which is in a closed state in non-regenerative and cooperative braking but is opened in the regenerative and cooperative braking are connected to a master cylinder M. COPYRIGHT: (C)2006,JPO&NCIPI

Braking hydraulic pressure control device for vehicle

PROBLEM TO BE SOLVED: To reduce the number of parts, simplify structure, and prevent rotation around an axial line and movement in the axial direction, and fix a cable at a bracket plate in a fixed attitude. SOLUTION: At a clamp member 12A, there are provided a pair of receive portions 25, sandwiching an outer edge of a slit 19 from both sides, is provided at the bracket plate 13. An insertion portion 21, formed into a non-circle cross-sectional surface shape and inserted in a support hole 18, a neck portion 22 continuing to the rear end of the insertion portion 21; a contact portion 23, which is continuously provided at the rear end of the neck portion 22 at right angles so as to be brought into contact with both the receive portions 25 with the insertion portion 21 inserted in the support hole 18; and a groove 24, surrounding the insertion portion 21 and the neck portion 22 and formed in an arc condition so as to close both the ends in the circumferential direction by both the end portions inner side surfaces of the contact portion 23 are provided. COPYRIGHT: (C)2005,JPO&NCIPI

Fixing structure for cable

PROBLEM TO BE SOLVED: To avoid increase in the kinds of parts and to simplify the constitution of a pressure-regulation valve means by enabling it to be applied to vehicles having different specifications as such, in a vehicular brake device in which the output liquid pressure of a liquid pressure generation source is regulated by a pressure-regulation valve means operated according to brake operation input and is applied to a double force liquid pressure chamber to which the back surface of a master piston is faced. SOLUTION: The pressure-regulation valve means 7 is constituted such that the state for communicating the double force hydraulic chamber 9 with the liquid pressure generation source 6 and shutting off between the double force hydraulic chamber 9 and the reservoir R, the state for shutting off between the double force hydraulic chamber 9 and the liquid pressure generation source 6 and communicating the double force hydraulic chamber 9 with the reservoir R, and the state for shutting off the double force hydraulic chamber 9 from both the liquid pressure generation source 6 and the reservoir R are electrically driven/switched according to the detection value of a detection means 74 for detecting a brake operation amount of the brake operation member 5. COPYRIGHT: (C)2009,JPO&INPIT

Vehicular brake device

PROBLEM TO BE SOLVED: To provide a negative pressure pump capable of effectively suppressing the entry of water or the like therein. SOLUTION: An insertion piece 77 and a barrier 89 against which the foreign matter intruding thereto through the final exhaust port 81 is collided to change the direction are disposed in the second discharge chamber 98 of the negative pressure pump. Since the insertion piece and the barrier against which the foreign matter intruding thereto through the final exhaust port is collided to change the direction are disposed in the second discharge chamber, a labyrinth can be formed therein, and the entry of water or the like therein from the outside can be effectively suppressed. COPYRIGHT: (C)2011,JPO&INPIT

Negative pressure pump

PROBLEM TO BE SOLVED: To provide a negative pressure pump for a negative pressure booster for a vehicle capable of improving the response to a reduction in the pressure of the negative pressure pump. SOLUTION: This negative pressure pump is used to reduce, to a negative pressure, the pressure in the negative pressure chamber of a negative pressure booster installed on a vehicle. A check valve 100 which is installed between the negative pressure pump and the negative pressure booster and closed when the pressure of the negative pressure pump is higher than the pressure of the negative pressure booster is assembled at the inlet section 72 of the negative pressure pump. COPYRIGHT: (C)2011,JPO&INPIT

治朗鈴木

Papers

Braking hydraulic pressure control device for vehicle

Fixing structure for cable

Vehicular brake device

Negative pressure pump

Negative pressure pump for negative pressure booster for vehicle

治朗 鈴木

Papers

Braking hydraulic pressure control device for vehicle

Fixing structure for cable

Vehicular brake device

Negative pressure pump

Negative pressure pump for negative pressure booster for vehicle

治朗鈴木