Camshaft bearing cap of engine

A technology of bearing caps and camshafts, which is applied to engine components, machines/engines, mechanical equipment, etc., can solve problems affecting speed, etc., and achieve the effects of fast response, good connection strength and sealing performance

Inactive Publication Date: 2010-12-08
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Camshaft bearing cap of engine
  • Camshaft bearing cap of engine
  • Camshaft bearing cap of engine

Examples

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Embodiment Construction

[0018] Such as figure 1 and figure 2 As shown, the diameter of the camshaft hole 3 on the intake side of the shaft cover is 33mm, the diameter of the camshaft hole 1 on the exhaust side is 28mm, and the larger design of the camshaft hole 3 on the intake side ensures that there is enough space for VVT oil supply , Oil return system.

[0019] Five connecting bolt through holes 2 that are not on the same straight line are designed on the shaft cover body for the connection of the shaft cover 15 and the cylinder head 14 (see image 3 ). Among them, a connecting bolt hole in the middle is offset to the side of the OCV valve installation hole, and is located near the oil supply hole 9, which can effectively seal the surrounding area of ​​the oil supply hole. The fact that the five fixing bolts are not on the same straight line can also increase the joint stiffness of the shaft cover and reduce the deformation of the shaft cover when the engine is working.

[0020] The shaft cov...

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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...

Claims

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Application Information

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IPC IPC(8): F01L1/047F01L1/46F01M9/10
CPCF01L2001/0476
Inventor 吴国勇韦颂付秋波艾小玉刘定全
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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