An armature assembly for a small flow miniature solenoid valve

Abstract

The invention discloses an armature assembly for a small-flow miniature electromagnetic valve, which includes a sleeve, a coil assembly, and an armature. The lower end of the armature is provided with a valve seat, and the top of the armature is provided with a spring for pressing the armature on the valve seat. The seat and the armature are sealed and matched by at least two annular protrusions and annular rubber pads arranged at intervals. The annular rubber pads are crimped between the tops of each annular protrusion. Air holes are provided on the armature, and the air holes are located in the ring rubber pads The outer side of the valve seat or / and the inner ring part of the annular rubber pad, and the valve seat is provided with a vent hole between adjacent annular protrusions. The present invention can adjust different outlet flow rates according to requirements, and can keep the solenoid valve in the open or closed state without continuously being in a high-current power supply state, and can achieve precise metering and control of gas injection volume, and respond to CPU command requirements in a timely manner , so as to achieve the best air-fuel ratio, meet the emission requirements, and the design life is increased from 150 million times to 600 million 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...

AI Technical Summary

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

Images