Master - cylinder for motor vehicles with a device for determining the brake actuation, in particular the position of the piston

摘要

The invention proposes a master cylinder 1 with a device for detecting actuation of a braking system. The detection device is fixed on a body 2 of the master cylinder 1, at a pressure chamber 5. The detection device comprises a magnetic circuit 9, which can be opened and closed by a moving magnetic piece 19. The moving magnetic piece 19 is, for example, fixed to a piston 4 of the master cylinder 1. The actuation of a brake pedal causes the piston 4, and the moving piece 19, in the master cylinder 1. The magnetic circuit 9 then changes state (open or closed.). The change of state of the magnetic field enables the lighting and extinction of the stop lights.