Patent ID: 6193031
Filing Date: 2001-02-27
Classification: B60T

Abstract:
Process of bleeding and filling a slip-controlled, hydraulic dual-circuit brake system for automotive vehicles with front axle and rear axle wheel brakes, which brake system includes a pressure generator, pressure modulation valves, and at least one pump, a bleeding device and a filling device connected to the dual-circuit brake system to implement the process, and the bleeding device is connected to at least one bleeder valve of a wheel brake, and the filling device for the filling with fluid is arranged on the braking pressure generator,wherein bleeding of the wheel brakes is executed in two sequences of operation: in the first sequence of operation, the wheel brakes of the front axle and the rear axle are pre-bled on associated wheel-brake-side bleeder valves exclusively by a small number of actuating cycles of the braking pressure generator irrespective of bubble-free condition of the fluid, and wherein in the second sequence of operation a bubble-free main bleeding and filling of the front-wheel and rear-wheel brakes is executed by several actuating cycles of braking pressure generator, during which, in recurrent phases of main bleeding and filling of the dual-circuit system, the pressure modulation valves and the pump are clockwise operated, and the pump operation represents a time maximum at the end of a series of actuations of the braking pressure generator.