High pressure oil pump lubricating oil passage of direct injection gasoline engine

Abstract

The invention relates to a high pressure oil pump lubricating oil passage of a direct injection gasoline engine. The high pressure oil pump lubricating oil passage comprises a cylinder cover oil path arranged on an engine cylinder cover and is characterized by further comprising an annular oil groove formed in a cam shaft, wherein the annular oil groove is formed in a working shaft neck of the cam shaft and formed on one side of a high pressure oil pump driving cam on a non-working shaft neck of the cam shaft; the high pressure oil pump lubricating oil passage further comprises a connecting oil path and a high pressure oil pump oil path, wherein the connecting oil path is arranged on an integrated cam shaft cover; the high pressure oil pump oil path is communicated with the connecting oil path; the high pressure oil pump oil path is communicated with a high pressure oil pump tappet hole; and the cylinder cover oil path on the engine cylinder cover and the connecting oil path on the integrated cam shaft cover are respectively communicated with the annular oil groove of the cam shaft. The high pressure oil pump lubricating oil passage of the direct injection gasoline engine, provided by the invention, has the advantages as follows: the structural layout is compact; spaces can be saved; and moreover, a high pressure oil pump can be lubricated without an external lubricating oil path and additional parts, so that the assembling difficulty and manufacturing cost of the engine can be prevented from being increased.

Description

technical field [0001] The invention relates to an engine lubricating oil circuit, in particular to a high-pressure oil pump lubricating oil circuit of a direct-injection gasoline engine. Background technique [0002] In order to meet the increasingly stringent requirements of engines in terms of power, economy and emissions, it is urgent to upgrade the engines. In-cylinder direct injection technology is an important means to achieve lean gas combustion. Its principle is that high-pressure gasoline is directly sprayed into the cylinder in the form of mist for combustion. The extremely high fuel pressure and cylinder pressure ensure the lean gas and make the combustion more complete. , with higher efficiency and stronger power, which improves the economy and power of the engine while reducing fuel consumption and emissions. Therefore, this technology is widely used in engines. However, in direct-injection gasoline engines, the lubrication of the high-pressure oil pump is...

AI Technical Summary

Problems solved by technology

However, in direct injection gasoline engines, the lubrication of the high-pressure oil pump is a difficult problem. In the current direct injection gasoline engines, most of the high-pressure oil pumps are arranged at the tail end of the engine, and a separate external lubricating oil circuit is required, and even new parts can be added to meet the requirements of the high-pressure oil pump. Lubrication requirements make the assembly of the whole machine more difficult, the assembly process is more complicated, and the cost is higher

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