Vehicle brake control system

摘要

A control valve is provided to control the rear axle brake pressure in response to vehicle loading and deceleration. This control valve reduces the rear axle brake pressure relative to the system pressure PS present at the input side of the control valve whenever the system pressure exceeds a threshold value. The control valve is provided with a control piston therein having an additional active surface thereon. This active surface can be subjected to the pressure Pa via a connection to the control valve input pressure. A seat-controlled valve is located within this connection and exerts a closing force to seal off the connection depending on the deceleration of the vehicle.