Slip-controlled brake system for automotive vehicles

Slip-controlled brake system with a deceleration-sensitively actuated brake pressure modulator comprising a shaft rotating at a velocity related to the angular velocity of a controlled vehicle wheel and an inert mass arranged on the shaft and rotating together with said shaft, which inert mass is axially displaceable in opposition to a return force on said shaft when the controlled vehicle wheel is decelerated and a wheel deceleration threshold is exceeded and which thereby acts upon a control element controlling the brake pressure modulation, said return force being provided by a resilient means comprising at least two return springs and mounted adjacent to a pressure chamber coaxially surrounding said shaft and communicating with the brake pressure in the wheel brake (5) of the controlled wheel (6), said brake system further including a clutch and brake mechanism which permits a difference in speed between the shaft and the inert mass (8) when the vehicle wheel is decelerated, and which causes the axial displacement as well as a deceleration of the inert mass (8) during the control phase, wherein said resilient means are operable to vary the deceleration of the inert mass (8) as a function of the instantaneous brake pressure in the wheel brake (5) of the controlled wheel (6).