Vehicle brake system, has hydraulic pump drives piston-cylinder-unit, which comprises accumulator housing in stepped assembly with stepped borings for accommodating pistons with different piston surfaces

摘要

The system (1) has an electronically controlled hydraulic unit (HCU) comprising a receiving body (7) provided with a hydraulic pump as a pressure source. The pump drives a piston-cylinder-unit (19), which permits a hydraulic citation of the pump and is partially integrated into the receiving body. The piston-cylinder-unit has an accumulator housing in a stepped assembly with stepped borings for accommodating pistons (21, 24) with different piston surfaces. The piston (21) and control pistons are firmly connected with each other.