| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a gas injection valve in which reduction of sealing force can be suppressed by preventing deformation or protrusion of the sealing member. <P>SOLUTION: The apparatus is equipped with a needle valve 6 for interrupting the injection, an injection fluid feed part 11 for feeding the injection fluid injected from an injection hole 22, an injection fluid pressure receiving part 33 for receiving the pressure of the injection fluid in a direction to release the injection hole, a working fluid feed part 13 for feeding the working fluid capable of pressing the needle valve in the direction to close the injection hole 22, an electromagnetic valve 8 for switching flow of the working fluid from a state where the needle valve 6 is pressed in the direction to close the injection hole to the state where the working fluid is discharged and the pressure to the needle valve is released, a sealing member 9 for dividing which is arranged between the needle valve 6 and an inner wall of a nozzle body 21 to separate a space where the working fluid is fed from a space in which the injection fluid is fed, and preventing both from being mixed, and a regulating working fluid feed part 10 for feeding the regulating working fluid in which a pressure difference with respect to the injection fluid to an opposite side of the injection fluid pressure receiving part 33 across the sealing member 9, is in a predetermined range of the pressure. <P>COPYRIGHT: (C)2012,JPO&INPIT |
