Injector control valve of electric control internal combustion engine

Abstract

The invention relates to an injector control valve of an electric control internal combustion engine. The injector control valve comprises a gag bit, a control valve base, an injector basal body, a gag bit rod, a steel ball, a control panel, a control piston, an electromagnetic driver and a gag bit return spring. The injector control valve is characterized in that the support sealing surface at the upper end of the control panel is a conical concave curved surface; the conical concave curved surface consists of a large-angle conical surface, a circular arc transitional section and a small-angle conical surface in sequence from periphery to center; the angle of the large-angle conical surface is 130-150 degrees; and the angle of the small-angle conical surface is 90-125 degrees. The control valve can precisely and stably control the change of pressure in a pressure control room, so that the injection quantity of an injector is stable and controllable; and the control valve can effectively rotate the steel ball, so that the service life of the control valve is prolonged.

Description

technical field [0001] The invention relates to an electronically controlled internal combustion engine injector control valve with a novel structure, which belongs to the field of diesel engine fuel injection systems. Background technique [0002] A fuel injector is a device that injects liquid fuel into the combustion chamber of an internal combustion engine. One of the solenoid valves controls the opening and closing of the armature, so that the steel ball and the cone valve are sealed or not, and the pressure of the fuel in the pressure control chamber rises or falls, thereby controlling the control piston of the fuel injector to move up and down in the axial direction through the pressure difference sports. It can be seen from the principle of the injector that the change rule of the fuel pressure in the pressure control chamber determines the fuel injection quantity of the injector. In terms of the stability and smoothness of the internal combustion engine, the fuel ...

AI Technical Summary

Problems solved by technology

The throttling flow rate of the sealing cone is difficult to guarantee due to the different sealing elements

[0004] The seal between the steel ball and the cone valve is in line contact. Since the steel ball and the cone valve are in the opening and closing movement, the contact line between the steel ball and the cone valve is continuously affected by the impact force. Therefore, during the continuous operation of the injector, the steel ball Line contact with the poppet is prone to wear due to fatigue

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