| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel injection valve which can prevent an actuating fluid for actuating a needle valve and a fluid fuel injected when the needle valve is open from leaking out toward each other. <P>SOLUTION: The fuel injection valve has the needle valve 32, and a nozzle body 36 that has a circular seal chamber 52 composed so as to encircle the needle valve 32. The fuel injection valve has a lip seal 54 which is provided inside the seal chamber 52 and which has a circular lip section 54a having a sliding face 54a1 that is in sliding contact with a periphery 32a of the needle valve 32. An O ring 56 which exists by being compressed by the lip section 54a and the periphery 52a is provided between the lip section 54a and the periphery 52a of the seal chamber 52. A back up ring 58 is arranged in contact with a contact face 54b2 of a flange section 54b in the seal chamber 52 and so as to be pressed against the periphery 32a of the needle valve 32 when a pressure of a gas fuel that acts on inside the seal chamber 52 is received. <P>COPYRIGHT: (C)2012,JPO&INPIT |
