Patent ID: 6230688
Filing Date: 2001-05-15
Classification: F02D,F02M,F04B

Abstract:
A process for generating and delivering high-pressure fuel to a high-pressure storage chamber of a fuel injection system of an internal combustion engine, which comprises delivering fuel from a tank via a low pressure pump as a pre-feed pump to an intake side of a high-pressure pump, delivering a part of the fuel delivered by the low-pressure pump to the high pressure pump to lubricate the high-pressure pump, controlling the delivery quantity of the low-pressure pump or the delivery pressure on the delivery side of the low-pressure pump as a function of a currently required fuel quantity determined by sensors and a control device, and branching off from the delivery flow of the low-pressure pump a constant lubrication flow quantity, which is essentially independent of the pressure on the delivery side, and delivering a residual remainder flow of the fuel to the intake side of the high-pressure pump.