Patent ID: 6772734
Filing Date: 2004-08-10
Classification: F02M

Abstract:
A high-pressure fuel pump for a fuel injection system of an internal combustion engine, comprisingat least one pump element (19), a prefeed pump (1), a metering valve (47), the prefeed pump (1) pumping fuel from a tank (5) to the suction side of the pump element or elements (19), and the fuel quantity pumped by the prefeed pump (1) to the suction side of the pump element or elements (19) being regulatable by the metering valve (47), and a controllable throttle (49) for limiting the fuel inflow from the suction side of the pump element or elements (19), wherein the throttle (49) closes when the fuel pressure on the compression side (15) of the prefeed pump (1) is below a first reference value, and wherein the throttle (49) is controlled by a control valve (55) that is subjected to the fuel pressure on the compression side (15) of the prefeed pump (1).