Fuel injector supporting ring capable of effectively reducing work noise of gasoline direct injection engine

Abstract

The invention provides a fuel injector supporting ring capable of effectively reducing the work noise of a gasoline direct injection engine. The fuel injector supporting ring comprises an upper check ring (1-1), an elastic connecting part (1-2) and a lower check ring (1-3), wherein the upper check ring (1-1), the elastic connecting part (1-2) and the lower check ring (1-3) are coaxial. The upper check ring (1-1), the lower check ring (1-3) and the middle elastic connecting part (1-2) are welded together, and the elastic connecting part is of a hollow cylinder structure; the upper check ring (1-1) is used for being connected with a fuel injector body (3), and the lower check ring (1-3) is used for being connected with an engine cylinder. Under the condition that the structural strength of the fuel injector supporting ring is met, the structure of the fuel injector supporting ring is innovatively designed and optimized, and the elastic connecting part (1-2) is skillfully utilized to make the upper check ring (1-1) and the lower check ring (1-3) elastically connected together. When the engine runs, the fuel injector supporting ring of the structure can effectively damp the vibration transmission of a high-pressure fuel system to the engine body, and the noise level of the complete machine is improved.

Description

technical field [0001] The invention belongs to the field of automobile engines, in particular to the field of direct fuel injection systems for gasoline engines. Background technique [0002] Compared with traditional gasoline engines, gasoline engine direct injection (GDI) technology is used by major OEMs because of its better fuel economy and power performance. Studies have shown that among GDI engine noise sources such as crankcase mechanical components, combustion pressure and high-pressure fuel system, the high-pressure fuel system has become the main source of GDI engine idling noise. Working noise is an important performance indicator of the comfort of the vehicle. Major OEMs at home and abroad have established strict noise evaluation standards as the control goal of project research and development. Therefore, how to reduce the idling noise of the GDI engine and improve the drivability of the vehicle is a long-term problem faced by major OEMs. [0003] As we all k...

AI Technical Summary

Problems solved by technology

The main disadvantage of the support ring of the fuel injector: During the working process of the fuel injector, because the support ring is an integral rigid structure, it cannot effectively damp the vibration transmission from the fuel injector to the engine body, resulting in an increase in the noise level of the whole machine

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