Engines VVT phase machine oil supply duct structure

Abstract

The invention provides an engine VVT phaser oil supply passage structure. An oil trough ring is arranged on the internal wall of a shaft hole of a camshaft of a cylinder cover and a corresponding internal wall of a camshaft cover; the oil trough is communicated with an oil hole of an oil inlet passage or an oil return passage to which the camshaft leads an internal oil chamber and an external oil chamber of the VVT phaser; the oil trough of the cylinder cover is provided with an oil hole communicated with an engine oil control valve; meanwhile, the external wall of the shaft neck of the camshaft is also provided with an oil trough ring; the oil trough is communicated with the oil hole of the oil inlet passage or the oil return passage to which the camshaft leads the internal oil chamber and the external oil chamber of the VVT phaser, and is also communicated with the oil hole leading to the engine oil control valve and arranged at a corresponding position of the cylinder cover. As only one oil trough is arranged on the cylinder cover, the structure reserves sufficient space for the design and installation of the shaft cover of the camshaft; the other oil trough is arranged on the shaft diameter of the camshaft, which is beneficial for reducing the diameter of the shaft, improving the strength of the position of the camshaft and reducing the processing difficulty.

Description

Technical field [0001] The invention relates to an engine oil supply system, in particular to the arrangement of a VVT phaser oil supply system for a small displacement engine Background technique [0002] When the engine is running, the VVT ​​(Variable Valve Timing) system uses OCV (Oil control valve) to adjust the amount of oil required to enter the internal and external oil chambers of the cam phaser to change the camshaft timing For the purpose of phasing, this requires the oil supply system to include an oil inlet passage and a return oil passage to correspond to the inner and outer oil chambers of the VVT, and the two oil passages can be interchanged, that is, the oil inlet passage can be changed to the oil return passage The oil passage can be turned into an oil passage. [0003] Under normal circumstances, the VVT ​​phaser oil supply system generally arranges two oil grooves on the cylinder head or two oil grooves on the camshaft to meet the requirements of two oil passag...

AI Technical Summary

Problems solved by technology

But these two methods have certain defects: if two oil grooves are arranged on the cylinder head, it will limit the arrangement space of the bolt holes of the camshaft cover, which will inevitably affect the design, machining, strength and installation of the camshaft cover. ; And arranging two oil grooves on the camshaft will also increase the diameter of the camshaft journal, and will affect the strength and processing difficulty of the camshaft

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