KR980002634A - Double head valve preventing gas back flow - Google Patents

Abstract

1. Technical field to which the invention described in the claims belongs

The present invention relates to a valve of an engine.

2. Technical challenges to be solved by the invention

The valve is configured as a double head type, and one side valve is made movable so as to prevent reverse flow of intake / exhaust gas of the engine.

3. The point of the solution of the invention

A valve for opening and closing an intake port and an exhaust port of an engine with a head formed at a terminal end of a valve stem passing through a cylinder head, the valve comprising: a movable head which is inserted into the valve stem at a predetermined distance from the head, And regulating means for regulating the movement of the movable head to stop at a predetermined position of the valve stem.

4. Important Uses of the Invention

Prevent intake / exhaust gas back flow

Description

Double head valve preventing gas back flow

Since this is a trivial issue, I did not include the contents of the text.

FIG. 1 is a perspective view of a conventional engine valve; FIG.

FIG. 2 is an internal structural view of an engine portion equipped with a conventional valve. FIG.

FIG. 3 is a perspective view of a double head valve according to the present invention. FIG.

Figures 4a and 4b are schematic diagrams illustrating regulatory means in the present invention.

Claims (6)

1. A valve for opening and closing an intake port and an exhaust port of an engine with a head formed at a terminal end of a valve stem penetrating a cylinder head, the valve comprising: a movable head that is inserted into the valve stem at a predetermined distance from the head, And regulating means for regulating the movement of the movable head to stop at a predetermined position of the valve stem. The valve apparatus according to claim 1, wherein the restricting means comprises: a groove formed on an outer circumferential surface of the valve stem along a valve stem axial direction at a predetermined length; And a protrusion protruding from an inner peripheral portion of the movable head. 2. The valve apparatus according to claim 1, wherein the restricting means includes a male screw portion formed at a predetermined position of the valve stem spaced apart from the fixed head by a predetermined distance, and a locking piece formed with an female screw portion engaged with the male screw portion, And the side portion of the movable valve is regulated so as to be stopped at the movable fixed position. 2. The valve apparatus according to claim 1, wherein the restricting means is configured to interpose an engaging piece for restricting an upper portion of the movable head at a predetermined position of the valve stem, and to fix the engaging piece to the valve stem with a fixing pin. Prevent double head valve. The fuel cell system according to any one of claims 1 to 4, wherein the movable head is mounted on the intake port, the movable head advances on the valve stem by a gas pressure introduced when fuel gas is inhaled to open the intake port, Wherein the suction valve closes the suction port by moving the valve stem backward by the backflow gas pressure caused by the back flow of the gas. The exhaust gas recirculation system according to any one of claims 1 to 4, wherein the movable valve is retracted to the engaging means when the exhaust gas is discharged to the exhaust port, and when the exhaust gas flows backward to the exhaust port at the exhaust end, Wherein the exhaust valve is configured to advance the stem so as to close the exhaust port. ※ Note: It is disclosed by the contents of the first application.