Assisted braking for motor vehicle, comprises shape memory element which is activated by external signals to open the servomotor valve and operate the brakes in supplement to manual operation

摘要

In normal operation a rod (4) opens a servo valve (6) to allow atmospheric air to enter a chamber (7b) and actuate a piston (9) which faces a depression chamber (7a) and is connected to the master cylinder. A shape memory element (22) fixed at one end (24a) contracts on passage of an electric current (23) triggered (29) by external signals such as an obstacle detecting radar or illumination of brake lights and opens the servo valve through attachment (24b) to the rod.