High-pressure oil pump mounting seat with sound insulation structure

Abstract

The invention relates to a high-pressure oil pump mounting seat with a sound insulation structure. A mounting seat body comprises a high-pressure oil pump cam chamber, a first flange, a supporting component and a second flange, four first bolt holes are formed in the first flange, and two second bolt holes are formed in the second flange. The high-pressure oil pump mounting seat is characterized by further comprising a sound insulation box and a sealing cover, wherein the sound insulation box is connected with the second flange of the mounting seat body, the sealing cover is connected with the sound insulation box, and three open groove structures are arranged on the side wall of the sound insulation box. Three vertical sealing baffle plates are arranged at the edge of the sealing cover and matched with the three open groove structures on the side wall of the sound insulation box in a one-to-one corresponding manner respectively. A noise spreading route generated in operation of a high-pressure oil pump can be remarkably reduced, and the NVH (noise vibration and harshness) performance of an engine is improved.

Description

technical field [0001] The invention relates to a high-pressure oil pump accessory of an engine, in particular to a high-pressure oil pump installation seat with a sound-insulating structure. Background technique [0002] In order to improve the fuel economy of the engine and meet the increasingly stringent emission regulations, more and more engines adopt gasoline direct injection (hereinafter referred to as GDI) technology. GDI technology increases the gasoline pressure through a high-pressure oil pump, and then directly injects high-pressure fuel into the combustion chamber through a high-pressure nozzle. GDI engine has good transient response and can precisely control the air-fuel ratio to achieve stratified lean and homogeneous combustion, thereby reducing emissions and improving fuel economy. The high-pressure oil pump is one of the key parts of GDI technology, driven by the camshaft. Therefore, the general GDI engine is designed with a special high-pressure oil pump...

AI Technical Summary

Problems solved by technology

[0003] However, due to the high-speed reciprocating movement of the pump needle in the high-pressure oil pump and the impact of the solenoid valve spool, etc., there is a loud noise near the high-pressure oil pump, which affects the NVH performance of the whole machine

The above-mentioned high-pressure oil pump support for direct injection engines does not solve these problems in the high-pressure oil pump, so further exploration is needed

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