Assembling and rivet pressing method of VVT (Variavle Valve Timing) oil control valve

Abstract

The invention discloses an assembling and rivet pressing method of a VVT (Variavle Valve Timing) oil control valve. The VVT oil control valve comprises a casing, a valve body, a valve piston, a plastic covered assembly, a support, an armature assembly, O-shaped rings, a front yoke assembly and a magnetic insulated sleeve. The assembling and rivet pressing method of the VVT oil control valve includes that the plastic covered assembly is placed into the casing; position limitation is achieved when an external matching end structure of the plastic covered assembly is matched with a clamping position end face to enable the plastic covered assembly to be fixed at a limited position inside the casing to enable other components to be placed into the casing from the entering direction of the plastic covered assembly; the magnetic insulated sleeve, the armature assembly, a first O-shaped ring, the front yoke assembly, a second O-shaped ring, the valve body, the support and the valve piston are sequentially placed into the casing; flanging positions of the casing is performed circumferential rivet pressing from top to bottom from one end of the valve body; and accordingly the assembly is achieved with once rivet pressing.

Description

technical field [0001] It is used for the assembly of the oil control valve (OCV) in the variable valve timing control system (VVT) of the engine. This new assembly pressure riveting method can improve the safety of the oil control valve. Background technique [0002] The oil control valve consists of: shell, valve body, valve plug, plastic-coated components, bracket, armature component, O-ring, front yoke component, magnetic isolation sleeve, etc. Most of the other oil control valves are Weld the shell and the bracket together, and then press riveting on the periphery of the shell, and some of them must be riveted twice at the front and rear ends of the shell. There are several risks in the existing assembly technology. First, the shell and bracket are welded structures. During the driving process of the vehicle, due to the vibration of the engine itself and the road surface, poor welding may cause the shell and bracket to disintegrate. When the vehicle is running at hi...

AI Technical Summary

Problems solved by technology

There are several risks in the existing assembly technology. The first point is that the shell and the bracket are welded structures. During the driving process of the vehicle, due to the vibration of the engine itself and the road surface, if there is poor welding, the shell and the bracket may disintegrate

When the vehicle is running at high speed, the increase in engine oil pressure may push the oil control valve out of the cylinder head, resulting in a large amount of oil leakage and serious accidents

The second point is that due to the large number of riveting positions in some assembly technologies, the risk of oil leakage from the solenoid valve after the oil control valve is assembled on the engine due to poor riveting increases, which may lead to abnormal consumption of engine oil and damage to the engine compartment. Pollution

Images