Electromagnetic valve structure for variable-lift air valve cam shaft

Abstract

The invention provides an electromagnetic valve structure for a variable-lift air valve cam shaft. The electromagnetic valve structure for the variable-lift air valve cam shaft is applied to the technical field of automobile engine parts, one end of a movable push rod (4) of the electromagnetic valve structure for the variable-lift air valve cam shaft movably penetrates through a valve sleeve (2)and a baffle (3) to extend into a valve body (1), one end of a compression spring (6) sleeving the movable push rod (4) abuts against a shaft shoulder (5), the other end of the compression spring (6)abuts against the baffle (3), a limiting clamp groove (7) is formed in one end of the movable push rod (4), the valve body (1) is internally provided with a solenoid (8) and a push rod buckle (9), anda magnetic core (10) is arranged in the solenoid (8). According to the electromagnetic valve structure for the variable-lift air valve cam shaft, extending and retracting control over the movable push rod of an electromagnetic valve can realized conveniently and reliably, limiting is effectively realized when the movable push rod retracts, response pop-up is realized quickly when the movable pushrod extends, and the demand for controlling an engine camshaft is met.

Description

technical field [0001] The invention belongs to the technical field of automobile engine components, and more specifically relates to a solenoid valve structure for a variable-lift valve camshaft. Background technique [0002] The solenoid valve of the camshaft is the actuator that drives the movement of the cam sleeve. It receives the signal from the automobile engine controller to control the moving push rod of the camshaft solenoid valve. In order to realize the axial movement of the sleeve, so as to achieve the purpose of adjusting the valve lift. But present camshaft axially reciprocating electromagnetic valve has the following defects: 1, need to determine the action travel position of electromagnetic valve moving push rod under the effect of sensor original. 2. At present, the solenoid valve with axial reciprocating motion of the camshaft does not make full use of the mechanical energy of the camshaft rotation to drive the pop-up action of the moving push rod. It nee...

AI Technical Summary

Problems solved by technology

But present camshaft axially reciprocating solenoid valves have the following defects: 1. It is necessary to determine the action stroke position of the solenoid valve moving push rod under the action of the original sensor

2. At present, the solenoid valve with axial reciprocating motion of the camshaft does not make full use of the mechanical energy of the camshaft rotation to drive the pop-up action of the moving push rod. It needs to be driven by the magnetic force generated by the electromagnetic solenoid, which leads to the need for a larger winding for the solenoid. The number of turns of the wire needs to generate a large magnetic force to overcome the elastic force of the spring and drive the moving push rod at the same time

3. The structure of the moving push rod of the existing solenoid valve is complex and usually requires permanent magnets and laser welding processes

Therefore, the electromagnetic valve of engine camshaft in the prior art can't satisfy actual demand

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