| 摘要 |
A brake system wherein the piston (2) of a master cylinder (1) is actuated by the pressure controlled by a brake valve (6), a monitoring device is provided for detection of fail conditions. The monitoring device comprises a switch (18) which is closed by a trip cam (17) upon an actuating distance (s1) having been traveled by the actuating element (4), and further switches (20, 21), the switch (20) being closed after an actuating travel distance (s21) and the switch (21) being closed after an actuating travel distance (s22), each by a trip cam (19) at the master cylinder piston (2). If the master cylinder piston (2) has not yet traveled the actuating distance (s21) or has already traveled furher than the distance (s22) when the switch (18) closes, an evaluating circuit (22) which evaluates the positions of the switches (18, 20, 21) will switch on a signal lamp (23) to indicate a fail condition in the brake system.
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