Camshaft bearing cap of engine

Abstract

The invention relates to a camshaft bearing cap of an engine. The body of a bearing cap is provided with an inlet side camshaft hole, an exhaust side camshaft hole and bearing cap installation bolt through-holes, and the bearing cap integrates an OCV (Oil Control Valve) mounting hole and an oil supply subsystem in an engine VVT (Variable Valve Timing) system. The diameter of the air inlet side camshaft hole is bigger than the diameter of the exhaust side camshaft hole, and the number of the bearing cap mounting bolt through-holes is five, wherein the middle hole is not in the same line as the other four holes. The inlet side camshaft hole is internally provided with two space holes with different angles, and the space holes are used as an oil hole A and an oil hole B of an OCV; the lateral face of the inlet side camshaft hole is provided with an oil inlet hole of the OCV, the bottom surface of the bearing cap is provided with an oil return hole which is communicated with the OCV mounting hole and is also provided with an OCV oil supply groove which is communicated with an oil supply hole; and the oil supply subsystem of an OCV system is composed of the oil holes and oil grooves. The camshaft bearing cap has better connecting intensity and sealing performance, the arrangement of oil holes and oil channels in the oil supply subsystem of the OCV can effectively and quickly respond to the working requirements of the VVT system.

Description

technical field [0001] The invention relates to a camshaft bearing cover of an engine, in particular to a structure of a camshaft cover of a VVT engine with a single intake side. Background technique [0002] In the engine layout with VVT system, the OCV (Oil Control Valve) is generally arranged on the cylinder head. This arrangement leads to the formation of thick parts on the cylinder head, which may cause casting defects, so the OCV valve is arranged on the camshaft 1 No. bearing caps have become a development trend. [0003] In the above layout form, the layout of the OCV valve oil passage needs to comprehensively consider whether each oil hole can effectively and quickly respond to the working requirements of the VVT ​​system. The general layout form is that the OCV valve supplies oil through the end, and arranges corresponding In and out of the oil hole, the weight of the spool of the OCV valve in such an arrangement will affect its corresponding speed. Secondly, the...

AI Technical Summary

Problems solved by technology

[0003] In the above layout form, the layout of the OCV valve oil passage needs to comprehensively consider whether each oil hole can effectively and quickly respond to the working requirements of the VVT ​​system. The general layout form is that the OCV valve supplies oil through the end, and arranges corresponding In and out of the oil hole, the weight of the spool of the OCV valve in such an arrangement will affect its corresponding speed

Images