Air flow control one-way valve for engine

Abstract

The invention discloses an air flow control one-way valve for an engine. The air flow control one-way valve for the engine comprises an upper housing, a lower housing, a valve plug, a gasket and a spring, wherein one end of the upper housing is inserted into one end of the lower housing, and the two ends are connected with each other by a screw thread or a welding process; air stream flows inwardfrom the upper housing and flows outward from the lower housing; the end face of a connection end of the upper housing is provided with a circle of annular bosses and a circle of valve plug guide brackets that can be ventilated along a radial direction; the annular bosses are positioned in a ring encircled by the valve plug guide brackets; the end face of the valve plug facing towards the annularbosses is provided with the gasket; the valve plug is arranged in the valve plug guide bracket; the gasket is pressed onto the annular boss; the spring is arranged between the other end face of the valve plug and an inner wall boss of the lower housing, and the end face of the valve plug provided with the spring is provided with a circuit of limiting brackets; and the heights of the limiting brackets are greater than the solid height of the spring. The one-way valve can bear greater working differential pressure, has reliable use and simple structure and can well satisfy the demands of a supercharged engine.

Description

technical field [0001] The invention relates to a one-way valve, in particular to a one-way valve used for controlling the unidirectional flow of airflow on a supercharged engine. Background technique [0002] On the engine, the one-way valve that controls the one-way flow of air flow is arranged between the air filter and the supercharger and between the supercharger and the intake manifold, such as figure 1 As shown, it plays the role of controlling the unidirectional flow of airflow to prevent the gas from entering the crankcase in reverse. Since the gas contains some impurities such as water and oil, the one-way valve needs to be resistant to corrosion, and the gas path will not be blocked after a long time of use; the one-way valve is frequently opened and closed, and the one-way valve needs to be able to withstand impact; and the one-way valve The directional valve requires high sensitivity, small air flow resistance, less leakage, and can withstand a large working pr...

AI Technical Summary

Problems solved by technology

[0003] One of the check valves currently used in the engine is a diaphragm check valve. Due to the defect of the diaphragm, the pressure difference between the two ends of the check valve cannot be too large, and the use cost is high, so it is not suitable for supercharged engine

There are similar spring-type one-way valves in the prior art, but when the pressure difference is large, the springs of these one-way valves will appear in a parallel state, which will reduce the service life of the one-way valve, or the guiding performance of the valve core is not good, and the structure is complicated , there are also certain defects when used in supercharged engines

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