Engine cam shaft bearing cap integrated with VVT oilway

Abstract

An engine cam shaft bearing cap integrated with a VVT oilway is characterized in that a first oil groove and a second oil groove are peripherally parallelly formed in the wall of a half-shaft hole on the air inlet side, a first oil hole and a second oil hole which are communicated to an upper seal face are respectively formed in the first oil groove and the second oil groove, the first oil hole and the second oil hole are respectively communicated with an OCV valve oil return hole A and B on the air inlet side, a third oil groove and a fourth oil groove are peripherally parallelly formed in the wall of a half-shaft hole on the exhaust side, a third oil hole and a fourth oil hole which are communicated to the upper seal face are respectively formed in the third oil groove and the fourth oil groove, the third oil hole and the fourth oil hole are respectively communicated with an OCV valve oil return hole A and B on the exhaust side, an air inlet side OCV valve oil supply hole and an exhaust side OCV oil supply hole which penetrate from a lower seal face to the upper seal face are formed between the air inlet side half-shaft hole and the exhaust side half-shaft hole of a cover. The engine cam shaft bearing cap has the advantages that engine oil is guided to the OCV valve mounted on a cylinder head cover by modifying the oilway, the oil returned by the OCV valve is supplied to a cam shaft, the oil supply requirement of normal operation of the OCV valve is satisfied, and an engine VVT function is achieved.

Description

Technical field: [0001] The invention relates to an engine camshaft bearing cap, in particular to an engine camshaft bearing cap integrated with a VVT oil passage. Background technique: [0002] At present, the main function of the camshaft bearing cover of the domestic VVT (engine variable valve timing technology) engine is to install the camshaft, the camshaft thrust and the OCV (oil control valve). When the OCV valve needs to be installed on the cylinder head cover due to space constraints, the current layout of the engine VVT ​​oil circuit cannot meet the oil supply requirements for the normal operation of the OCV valve, and cannot realize the engine VVT ​​function. For example, Chinese patent 201020168729.7 discloses a camshaft front bearing cover, the control oil circuit required by the VVT ​​provided on the bearing cover is only to supply the oil in the cylinder head to the camshaft through the oil groove and oil hole on the camshaft front bearing cover , when the ...

AI Technical Summary

Problems solved by technology

When the OCV valve needs to be installed on the cylinder head cover due to space constraints, the current layout of the engine VVT ​​oil circuit cannot meet the oil supply requirements for the normal operation of the OCV valve, and cannot realize the engine VVT ​​function

For example, Chinese patent 201020168729.7 discloses a camshaft front bearing cover, the control oil circuit required by the VVT ​​provided on the bearing cover is only to supply the oil in the cylinder head to the camshaft through the oil groove and oil hole on the camshaft front bearing cover , when the OCV valve needs to be arranged on the cylinder head cover due to space constraints, the camshaft bearing cover cannot provide an oil passage to supply the engine oil to the OCV valve and supply the return oil of the OCV valve to the camshaft, and it is impossible to realize the engine VVT function

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