Patent ID: 6213413
Filing Date: 2001-04-10
Classification: F02M,F16K

Abstract:
A fuel injection valve, comprising:an injection nozzle provided with an injection hole for gaseous fuel injection;a valve body that closes the injection hole; andan elastic body provided on one of a wall surface of the injection nozzle and a wall surface of the valve body, wherein the elastic body is provided such that when the body closes the injection hole, the wall surface of the valve body comes into abutment with the wall surface of the injection nozzle after the valve body has come into abutment with the injection nozzle through the elastic body, and a seal surface against gaseous fuel is formed by contact between the wall surface of the injection nozzle and the wall surface of the valve body; anda maximum surface roughness of the wall surface of the valve body and the wall surface of the injection nozzle, which abut each other, is substantially equal to or smaller than 4 .mu.m to form a seal against the gaseous fuel by contact between the wall surfaces.