An oil control valve characterized by end portion oil supply

Abstract

The invention provides an oil control valve characterized by end portion oil supply. The oil control valve comprises a valve body, a filter, a protruding shoulder and an elastic member. The valve body is provided with an oil inlet at an axial end portion. The filter comprises an annular main body portion and a filter screen fixedly mounted to the annular main body portion; the annular main body portion sleeves the outer peripheral surface of the end portion and the filter screen is located on the outer side of the oil inlet. The protruding shoulder is located on the outer peripheral surface of the valve body and protrudes outward in the radial direction. The protruding shoulder and the annular main body portion are arranged to be spaced from each other in the axial direction of the valve body. The elastic member is located in the gap between the protruding shoulder and the annular main body portion. The annular main body portion can move in the axial direction of the valve body and is axially in anti-disconnecting fit with the valve body. When moving towards the protruding shoulder in the axial direction, the annular main body portion can extrude the elastic member to make the elastic member deform elastically. The technical solution solves the problem that a filter screen of a filter in the conventional oil control valve characterized by end portion oil supply is liable to breakage because of fatigue.

Description

technical field [0001] The invention relates to the field of an oil control valve (OCV for short) used in a variable valve timing (Variable Valve Timing, VVT for short) system, in particular to an oil control valve for supplying oil at an end. Background technique [0002] The oil control valve is one of the core components of the variable valve timing system. According to the oil supply mode, the existing oil control valves are divided into two types: end oil supply oil control valves and side oil supply oil control valves. [0003] combine Figure 1 to Figure 2 As shown, an existing oil control valve for oil supply at the end includes two parts: a proportional electromagnet 1 and a hydraulic body 2 . Wherein, the hydraulic body 2 includes a valve body 3 , a piston 4 movably located in the valve body 3 , and a filter 5 . combine Figure 2 to Figure 3 As shown, the valve body 3 has an oil inlet 1 located at the axial end, the filter 5 has an annular main body 6, and a fil...

AI Technical Summary

Problems solved by technology

[0004] However, the existing oil control valve for oil supply at the end has the following disadvantages: when the oil control valve is working, the filter screen 7 of the filter 5 will be subjected to the circulating oil pressure of the hydraulic oil, causing the filter screen 7 to be easily fatigued and broken

Especially when the particles in the hydraulic oil are blocked in the meshes of the filter screen 7, the bending stress of the filter screen 7 will increase sharply, making this problem even more serious

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