Control valve and cam phase adjuster oil way system

Abstract

The invention provides a control valve and a cam phase adjuster oil way system. The control valve comprises a valve shell and a piston, an axial sliding fit structure is formed between the piston andthe valve shell, a drainage channel is formed in the valve shell, a drainage cavity is formed in the inlet end of the valve shell, one end of the drainage channel is communicated with the outer side of the circumference of the valve shell, and the other end of the drainage channel is communicated with the drainage cavity; the cam phase adjuster oil way system comprises a rotor, a cam shaft and a control valve as described above, the piston slides relative to the valve shell, an oil inlet, an drainage channel, a medium guide channel, an input interface and a flow guide oil channel are communicated in sequence to form an oil inlet flow channel, and the flow guide oil channel is communicated with the first work interface or is communicated with the second work interface. According to the control valve, the pressure oil guide part in a traditional cam phase adjuster oil way system can be omitted, the replacement and maintenance cost and the quality risk of an oil way system of the cam phase adjuster are reduced, the outstanding advantages of simplifying the overall structure of an oil way system and reducing the cost are achieved.

Description

technical field [0001] The invention relates to the field of cam phaser oil circuit design, in particular to a control valve and a cam phaser oil circuit system applied to variable valve timing adjustment. Background technique [0002] Variable valve timing adjustment technology refers to changing the overlapping angle of the intake and exhaust valves by controlling the opening angle of the intake and exhaust valves of the internal combustion engine under specific engine operating conditions, thereby increasing the intake air charge. and efficiency, better organize the intake vortex, adjust the cylinder explosion pressure and residual exhaust gas volume, and finally improve the comprehensive performance of the engine such as power, torque, emission, and fuel economy. [0003] In the existing oil circuit design of the cam phaser, the oil port of the camshaft and the input interface of the valve housing need to be guided by a custom-made pressure oil guide with a complex struc...

AI Technical Summary

Problems solved by technology

This kind of replacement operation is more complicated, not only the implementation cost is high, but also because the piston and the pressure oil guide are precision fitting parts, it is easy to be bumped, scratched, etc., resulting in a sudden increase in the quality risk of the cam phaser

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