Hydraulische Fahrzeugbremsanlage

摘要

The invention relates to a hydraulic braking system for automobiles having an electrohydraulic brake servo unit comprising a piston pump. In order to reduce pressure pulsations on a suction side of the multiple-piston pump, the invention provides for a multiple-piston pump that is embodied, for instance, as a six-piston pump with stepped pistons (68) that are alternately driven with 30 DEG and 90 DEG phase shifting in relation to each other. The drive phase shift of the stepped pistons (68) is chosen in such a way that suction volumetric flows have a even phase shift causing the entire suction volumetric flow of the multiple-piston pump to exhibit reduced pressure pulsation amplitude thereby diminishing the effects on the main brake cylinder.