Compressed natural gas injector

Abstract

A compressed natural gas injector comprises a injector casing, a valve seat, an armature, a spring, a coil, a coil covering, a stop iron and an electric plug. The injector casing and the stop iron are inserted into the coil hole. By roll cladding and closing in of two ends of the coil covering, the coil, the coil covering, the stop iron and the injector are connected into one. The valve seat, the armature and the spring are disposed in order in the internal hole of the injector casing. There is an axial through-hole on the stop iron, an axial blind hole on top of the armature, a side hole at the bottom of the armature in communication with the axial blind hole and an axial through-hole on the valve seat. At the bottoms of the armature and the stop iron are sulphurized rubber pieces and in the internal hole of the injector casing and on the cylindrical surface of the armature are sprayed the polytetrafluoro ethylene films.

Description

technical field [0001] The invention relates to a fuel timing quantitative supply device for a compressed natural gas gas engine, in particular to a compressed natural gas injector. Background technique [0002] Using natural gas instead of oil as fuel is an ideal and feasible way to improve energy structure, reduce pollution and save costs. The injector is an important part of the engine, and its function is to supply the gas fuel to the engine in a regular and quantitative manner. The structure and working principle of the existing natural gas injectors are as follows: figure 2 As shown, it includes injector housing 1, ball valve seat 2, guide sleeve 3, pole piece 4, coil 5, fastening screw and washer 6, fixed body 7, magnetic isolation ring 8, transition sleeve 9, ejector rod 10, steel The ball 11, the spring 12 and the spring seat 13; the spring seat 13, the spring 12, the steel ball 11, the ball valve seat 2, the guide sleeve 3, the ejector rod 10, and the pole piece ...

AI Technical Summary

Problems solved by technology

This type of injector has defects such as easy leakage between the steel ball 11 and the ball valve seat 2, breakage of the ejector rod 10, long response time, and unstable operation of the injector due to heating of the coil 5 during use.

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