Armature assembly for small-flow miniature electromagnetic valve

Abstract

The invention discloses an armature assembly for a small-flow miniature electromagnetic valve. The armature assembly comprises a sleeve, a coil assembly and an armature, a valve seat is arranged at the lower end of the armature, a spring for pressing the armature on the valve seat is arranged at the top of the armature, and the valve seat and the armature are in sealing fit through at least two annular protrusions arranged at intervals and an annular rubber pad. The annular rubber pad is connected between the tops of the annular protrusions in a pressed mode, air passing holes are formed in the armature and located in the outer side of the annular rubber pad or / and the inner ring portion of the annular rubber pad, and vent holes located between the adjacent annular protrusions are formed in the valve seat. Different outlet flows can be adjusted according to requirements, the electromagnetic valve can be kept in an open or closed state without being continuously in a high-current power supply state, accurate metering control over the fuel gas injection amount can be achieved, the command requirement of a CPU can be responded in time, and therefore the optimal air-fuel ratio is achieved, the emission requirement is met, and the designed service life is prolonged from 0.15 billion times to 0.6 billion times.

Description

technical field [0001] The invention relates to the technical field of gas injection solenoid valves, in particular to an armature assembly for a small-flow miniature solenoid valve. Background technique [0002] Solenoid valve is an industrial equipment controlled by electromagnetism. It is an automatic basic component used to control fluid and belongs to actuator. It is used to adjust the direction, flow, speed and other parameters of the medium in the industrial control system. Solenoid valves can cooperate with different circuits to achieve the expected control, and the control accuracy and flexibility can be guaranteed. At present, most of the gas metering solenoid valves used in engines in China have problems such as inaccurate gas metering control, unstable flow, and leakage, so that the best air-fuel ratio cannot be achieved, and the emission requirements cannot be met; and the existing gas metering solenoid valves When the electromagnet is in the working state for...

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Problems solved by technology

[0005] In view of the deficiencies in the above-mentioned background technology, the present invention proposes an armature assembly for a small-flow micro-solenoid valve and a micro-solenoid valve using the armature assembly for a small-flow micro-solenoid valve, which solves the problem of the control accuracy of the existing gas solenoid valve. Technical problems of low and inconvenient adjustment methods

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