초록 ▼

A process and system for generating and delivering high-pressure fuel to a high-pressure storage chamber of a fuel injection system of an internal combustion engine. The system includes a low-pressure pump as a pre-feed pump by which fuel is supplied from a tank and is delivered to the intake side o

A process and system for generating and delivering high-pressure fuel to a high-pressure storage chamber of a fuel injection system of an internal combustion engine. The system includes a low-pressure pump as a pre-feed pump by which fuel is supplied from a tank and is delivered to the intake side of a high-pressure pump and a part of the fuel delivered by the low-pressure pump is used to lubricate the high-pressure pump. In order to reduce the temperature level in the return and to increase the overall efficiency of the motor, the system is embodied so that the delivery quantity of the low-pressure pump or the delivery pressure on the delivery side of the low-pressure pump is controlled as a function of the currently required fuel quantity determined by sensors and a control device. A constant lubrication flow quantity, which is essentially independent of the pressure on the delivery side, is branched off from the delivery flow of the low-pressure pump and a residual remainder flow is delivered to the intake side of the high-pressure pump.

대표청구항 ▼

[ What is claimed is:] [1.]1. 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-

[ What is claimed is:] [1.]1. 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.