High-pressure fuel pump

Abstract

The invention relates to a high-pressure fuel pump (10) with a low-pressure area (20). In order to change the volume (30), the low-pressure area is defined by a sealing element (28), which can be offset from a still position. An adjustable adjusting element (38) interacts with the sealing element (28) so as to adjust the volume (30) of the low-pressure area (20) according to the needs.

Description

technical field [0001] The invention relates to a high-pressure fuel pump for applying high pressure to fuel in a fuel injection system of an internal combustion engine. Background technique [0002] High-pressure fuel pumps are used in fuel injection systems for injecting fuel into the combustion chamber of an internal combustion engine to apply high pressure to the fuel, wherein the pressure lies, for example, in the range of 150 bar to 400 bar in gasoline internal combustion engines and in the range of 1500 bar to 2500 bar in diesel internal combustion engines Inside. The higher the pressure generated in the respective fuel, the lower the emissions that are formed during the combustion of the fuel in the combustion chamber, which is advantageous especially against the background of the ever-increasing desire to reduce emissions. [0003] In order to be able to obtain a high pressure in the respective fuel, the fuel high-pressure pump is usually designed as a piston pump,...

AI Technical Summary

Problems solved by technology

Due to this fluctuation, filling losses can occur in the fuel high-pressure pump, so that the correct dosing of the fuel quantity required in the combustion chamber cannot be ensured

The resulting pressure pulsations also excite pump components and, for example, the feed line to the high-pressure fuel pump, causing vibrations which can lead to unwanted noise or, in the worst case, damage to various components.

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