Diesel engine and high pressure common rail fuel injection system thereof

Abstract

The invention relates to the technical field of diesel engines, in particular to a high pressure common rail fuel injection system. The high pressure common rail fuel injection system comprises a high pressure fuel pump, a fuel atomizer and a plurality of common rail pipes; the common rail pipes communicate with one another through the high pressure fuel pump and the fuel atomizer; the high pressure common rail fuel injection system further comprises a high pressure fuel pipe; and the common rail pipes communicate with the high pressure fuel pipe. The invention further relates to a diesel engine comprising the high pressure common rail fuel injection system. The common rail pipes communicate with one another through the high pressure fuel pipe, so that on the one hand, the pressure difference between the common rail pipes caused by uneven fuel supply of two cylinders of a fuel injection pump can be eliminated; on the other hand, rail pressure oscillation caused by fuel pumping of the fuel injection pump and fuel injection of the fuel atomizer can be eliminated, and accordingly the purposes of enhancing the stability of a hydraulic system, improving smoothness of operation of the whole engine, lowering the noise and improving emission consistency are achieved.

Description

technical field [0001] The invention relates to the technical field of diesel engines, in particular to a high-pressure common rail fuel injection system and a diesel engine including the high-pressure common rail fuel injection system. Background technique [0002] In the existing high-pressure common rail fuel injection system of diesel engines, the common rail pipe is a container for storing high-pressure diesel oil. [0003] In the V-type electronically controlled high-pressure common rail fuel injection system, the high-pressure diesel in the high-pressure oil pump is distributed to the injectors through two common rail pipes. The two common rail pipes are independent of each other, and the unevenness of fuel supply to the two cylinders of the fuel injection pump is likely to cause a pressure difference between the two common rail pipes, and the oil pumped by the fuel injection pump and the fuel injected by the injector will cause rail pressure fluctuations, thus affect...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-pressure common rail fuel injection system and a diesel engine including the high-pressure common rail fuel injection system, so as to solve the problems of pressure difference and rail pressure fluctuation between two common rail pipes in the prior art

Images