Abstract: A hydraulic automotive vehicle brake system with wheel slip control includes at least one non-return valve with a closure member that is lifted from its valve seat during evacuation of the brake system. An elastomeric sealing element is arranged between the closure member and the valve seat member.

Abstract: The present invention relates to a hydraulic unit for an automotive vehicle brake system according to the recirculation principle, wherein each brake system in the area of the hydraulic unit includes a prefilling location which opens into the pump suction conduit to take up brake fluid. Thus, filling of the hydraulic unit can be simplified by prefilling of the secondary circuit in the vehicle.

Abstract: The speed of a controlled wheel in a rear wheel anti-lock brake system is monitored during a spin-and-brake condition. Acceleration of the rear wheel following a string of dump pulses is an indication that the spin-and brake condition ended before the vehicle brakes were applied. A lack of acceleration of the rear wheel following a string of dump pulses is an indication that the spin-and-brake condition is present.

Abstract: The invention relates to a vehicle brake system of a motor vehicle, with an electronically controllable brake booster, comprising 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 electro-magnetic actuator, wherein a pressure difference between the pressure chamber and the vacuum chamber is adjustable, with the movable wall changing its position as a function of the pressure conditions in the vacuum chamber and in the pressure chamber, thereby actuating a master cylinder, with the electromagnetic being supplied with current signals by an electronic control unit during operation, which the electronic control unit generates as a function of driving dynamics conditions or external influences, characterised in that upon the presence of certain driving dynamics conditions or external influences, or combinations thereof which render the actuation of the master cylinder necessary with a predetermined probability with

Abstract: In an automobile having a pair of front wheels and a pair of rear wheels, and a brake system for selectively braking each of the pairs of front and rear wheels, a brake control device comprises a device for detecting a backward movement of the automobile, a device for detecting a predetermined locking condition of at least one of the pair of front wheels, and a device for controlling braking force applied by the brake system to the pair of rear wheels to be stronger than braking force applied by the brake system to the pair of front wheels when the automobile is moving backward with at least one of the pair of front wheels being more locked than the predetermined locking condition.

Abstract: A method and apparatus for providing regenerative and friction braking on a vehicle having one or more wheels driven by a drive motor includes a master cylinder (28), a hydraulic control unit (30), a brake control unit (38), a drive motor control unit (52) and a drive motor (18). The brake control unit commands build and dump valve pairs (31, 35) such that brake forces generated at the driven left and right wheels (14, 16) are a combination of the regenerative braking and hydraulic braking, the hydraulic braking being gradually reduced and the regenerative braking being gradually increased during transitions from anti-skid braking control to wheel speed based proportioning and regenerative braking control.

Abstract: The present invention relates to a method of bubble-free filling of brake fluid into a hydraulic automotive vehicle brake system, which is equipped with slip control and/or automatic braking intervention, the pump of which, under operating conditions, delivers brake fluid from the secondary circuit into the primary circuit according to the return delivery principle. In this arrangement, exclusively the primary circuit is bled and filled with undersaturated brake fluid.

Abstract: An actuation system includes a magnetostrictive pump assembly to operate a fluid ram such as a brake cylinder connected to an actuator such as a brake. A first accumulator is connected to an input of the fluid ram to store a fluid which actuates the fluid ram. A second accumulator is similarly connected to an output of the fluid ram to receive the used fluid after actuation of the fluid ram. The magnetostrictive pump assembly is connected between the first accumulator and second accumulator, to transfer the fluid from the second accumulator to the first accumulator such that the fluid is maintained at a high pressure for activation of the fluid ram. As the magnetostrictive pump assembly reacts essentially instantaneously, any delay between actuation or deactivation is practically eliminated. Further, although the displacement of the pump is relatively small, it can be cycled at extremely high frequencies to provide substantial pumping capacity for immediate brake activation.