Patent ID: 6142747
Filing Date: 2000-11-07
Classification: F02M,F04B

Abstract:
A fuel pump assembly (1), having a low-pressure region (ND) with at least one low-pressure pump (2) and a high-pressure region (HD) with at least one regulated-quantity high-pressure pump (3), which pumps a quantity of fuel required to compensate for a quantitative balance in the high-pressure region, the quantity of fuel regulation being effected via a metering unit (5) disposed between the low-pressure pump (2) and the high-pressure pump (3), wherein a pumping flow of the low-pressure pump (2) is greater than a pumping flow of the high-pressure pump (3); a fuel return line (8) branches off between the metering unit (5) and the high-pressure pump (3) and discharges into an inlet of the low-pressure pump (2); and a control element (9, 26) is disposed in the fuel return line (8).