A straight-through double-channel gas injection valve

Abstract

A straight-through dual-channel fuel gas injection valve comprises an electromagnetic coil and a movable iron core, wherein the upper and lower ends of the electromagnetic coil are respectively in seal fit with a fixed steel core and a nozzle; the top of the nozzle is in slide fit with the outer side wall of the movable iron core; a return spring is arranged between the movable iron ore and the fixed iron ore; a valve seat is coaxially arranged at the lower end of the nozzle; an auxiliary valve seat is coaxially arranged at the middle of the valve seat; the tops of the valve seat and the auxiliary valve seat are both in force fit with the bottom of the movable iron ore; a ring-shaped gas flow channel is formed between the upper end of the auxiliary valve seat and the inner side wall of the valve seat; an gas counterbore is formed in the bottom of the auxiliary valve seat; through holes are formed in the side wall of the gas counterbore, and communicate with the ring-shaped gas flow channel and the gas counterbore; an gas-inlet through hole is formed in the middle of the movable iron ore; the diameter of the gas-inlet through hole is smaller than that of the top of the auxiliary valve seat; and side gas holes are formed in the side part of the movable iron ore, and communicate with the gas-inlet through hole and a gas-inlet cavity formed in the middle of the nozzle. The straight-through dual-channel fuel gas injection valve provided by the invention is not only small in opening force and low in firing current, but also high in response speed and long in service life.

Description

technical field [0001] The invention relates to a fuel injection solenoid valve, in particular to a straight-through dual-channel gas injection valve, which is particularly suitable for reducing the opening force and driving current of the solenoid valve. Background technique [0002] The gas injection valve is an important part of the natural gas engine, which plays a role in fuel regulation. Under the control of the electronic control system, the engine fuel is supplied in a timely and appropriate amount. At present, there are many types of gas injection valves on the market. According to the direction of gas inlet and outlet, they are divided into straight-through type and lateral type. The market share of the two types is equal; they are divided into needle valve type, plunger type, ball valve type, etc. according to the structure. Most of them are plunger type, and the reliability is better than others. [0003] The Chinese patent application publication number is CN10...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem of large driving current in the prior art and provide a straight-through double-channel gas injection valve with small driving current

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