Patent ID: 6322163
Filing Date: 2001-11-27
Classification: B60T

Abstract:
A hydraulic brake system of a vehicle, comprising a dual-circuit master cylinder, two brake circuits in a diagonal division for two front wheel brakes and two rear wheel brakes, an antilock device incorporated into the brake circuits, and for each brake circuit, said antilock device has a return feed pump with an inlet valve (49), which is a check valve, and an outlet valve (50), which is a check valve, a first (28, 29) and a second (30, 31) electrically controllable valves, which are normally open, wherein the first valve is disposed between the master cylinder and the respective front wheel brake and wherein the second valve is connected to the respective rear wheel brake, the second valves (30, 31) are disposed between the rear wheel brakes (11, 12) and the master cylinder (2), and that by way of a check valve (37), which is opened in a direction of the inlet valve (49) of the return feed pump (34, 35), the rear wheel brakes (11, 12) are respectively connected to the inlet valves (49) of the return feed pumps (34, 35), and that a third, normally closed valve (32, 33) that is electrically controlled is respectively inserted between the front wheel brakes (7, 8) and the inlet valves (49) of the return feed pumps (34, 35), and said third normally closed valve (32, 33) is installed to control only the return flow from the front wheel brake (7 ,8) to the inlet valve (49) of the pump (34, 35).