Patent ID: 9103307
Filing Date: 2015-08-11
Classification: F02D,F02M,F04B

Abstract:
1. A high-pressure pump arrangement to be attached to a camshaft housing and to be driven by a camshaft of a motor vehicle comprising: a pump body which has a low-pressure inlet connected to a fuel supply line and a high-pressure outlet connected to a high pressure accumulator, the pump body having a leakage annular groove, a pressurization chamber which is provided within the pump body and within which a plunger is movably mounted and which is connected to the high-pressure outlet via a high-pressure valve, a suction chamber which is provided within the pump body and has a suction valve, an intake duct which is provided within the pump body and runs between the low-pressure inlet and the suction chamber, wherein the leakage annular groove is connected to the low-pressure inlet and the suction chamber via the intake duct, and an electrically regulated pre-supply pump connected to the low-pressure inlet, wherein the pre-supply pump is configured to operate as a throttle for regulation of volumetric flow and to maintain a fuel pressure level in the suction chamber that lies below at least one of atmospheric pressure and a pressure in a camshaft chamber of the motor vehicle in order to produce a suction effect in the leakage annular groove.