Brake pressure control apparatus

A brake system for automotive vehicles including a wheel brake, a master cylinder, and a wheel cylinder for said wheel brake, said master cylinder able to generate hydraulic fluid pressure to operate said wheel cylinder, a brake pressure control system including at least one motor-driven pump for the generation of a hydraulic fluid pressure to operate said wheel cylinder and said brake pressure control system, said pump having a suction and a pressure side, an electronic controller, an inlet valve which is associated with said wheel cylinder to control fluid communication of said wheel cylinder with said master cylinder and said pump, and an outlet valve controlling communication of said wheel cylinder with a low pressure region of said control system;

• wherein said outlet valve includes a closing element operated by said electronic controller, said closing element movable between a closed position closing communication through said outlet valve and an open position opening communication through said outlet valve, said inlet valve also including a closing element movable between a closed position closing communication through said inlet valve and an open position opening communication through said inlet valve, biasing means biasing said inlet valve closing element toward said closed position, said respective closing elements coupled to each other through coupling means, said coupling means including means causing said closing element of said outlet valve when in said closed position to exert a spring force on said closing element of said inlet valve resisting movement thereof to said closed position, said coupling means further including means operative upon movement of said closing element of said outlet valve to said open position allowing free closing movement of said closing element of said inlet valve induced by said biasing means.