Electrohydraulic power steering system as well as hydraulic pressure accumulator for a power steering system

摘要

An electrohydraulic power steering system (8) has a hydraulic circuit (10), with respect to which a pump (24), a cylinder / piston - unit (27) and a hydraulic pressure reservoir (36), wherein the pump (24) is designed as a reversible pump and optionally a first working chamber (28) or a second working chamber (30) of the cylinder / piston - unit (27), with a hydraulic pressure can act upon and wherein a suction connection (25, 26) of the pump (24) a via the pressure reservoir (36) of adjustable biasing pressure is applied.A hydraulic pressure reservoir (36) for a power steering system, preferably for the above-described, electrohydraulic power steering system (8) comprises a pressure accumulator housing (38), in which a pressure chamber (40) and a header chamber (42) are formed, as well as a in the direction of the pressure chamber (40) baufschlagten piston (44) between a first end position and a second end position is movable and the two chambers (40, 42) is separated from one another, whereby in the piston (44) a non-return valve (46) is integrated, which in an open position, the pressure chamber (40) and the header chamber (42) connects. The pressure chamber (40) has a pressure chamber connection (48), by way of which the pressure reservoir (36) to the hydraulic circuit (10) by the power steering system (8), can be connected in the pressure chamber (40) a collection space (50) for gas bubbles and the piston (44) from a predetermined hydraulic pressure in the pressure chamber (40) the ..