Honda Motor Co., Ltd.

Yasuhiro Arikawa

Hiromi Inagaki

Hidetoshi Kobori

Masaru Gotoh

A lock piston operates to automatically lock a parking brake piston which achieves a parking brake applied state in response to hydraulic pressure in a parking brake application control hydraulic chamber and operates to release a locked state in response to hydraulic pressure in a parking brake release control hydraulic chamber, and a manual change-over unit holding the hydraulic pressure in the parking brake release control hydraulic chamber to a hydraulic pressure on a lock release side, is provided among the wheel brake side hydraulic path, the parking brake application control hydraulic chamber and the parking brake release control hydraulic chamber by bypassing a hydraulic pressure control unit which changes over the application or release of hydraulic pressure to the parking brake application control hydraulic chamber and the parking brake release control hydraulic chamber.

Vehicle brake system

Normally opened control valvesA,B are configured into short-time rating valves, and normally opened opening/closing valvesA,B, which are electrically controlled to open and close and are configured into long-time rating valves, are connected in series to the normally opened control valvesA,B between a fluid pressure generating unit M and wheel brakesA toD.

Growing community of inventors

Saitama, Japan

Yasuhiro Arikawa