Piston pump for hydraulic brake assembly of motor vehicle, has pump piston that is sealed to eccentric chamber in pump bore by sealing rings, where pump bore is supplied with brake fluid under low pressure between rings

摘要

The pump (1) has a pump piston (4) and a pump bore (3) that open out in an eccentric chamber (6). The pump piston is sealed to the eccentric chamber in the pump bore by two sealing rings (15, 16) that are axially arranged in a consecutive manner. The pump bore is supplied with brake fluid under low pressure between the two sealing rings. The pump bore communicates with a brake pressure lowering valve of a wheel brake cylinder.