| 摘要 |
PROBLEM TO BE SOLVED: To inhibit the accumulation of a deposit by a simple structure on a wall surface of an injection hole 13, in an injector which injects and supplies fuel. SOLUTION: An injector forms an injection hole 13 attached to a tip 17 of a valve body 16, and includes an elastic member 41 having elasticity in the radial direction of the injection hole 13 so as to enlarge or reduce the radius thereof. Thereby, the elastic member 41, when injecting fuel enlarges the radius by the injection pressure of the fuel so that the deposit produced on an inner peripheral surface of the elastic member 41, namely, wall surface of the injection hole 13 is sheared is easily peeled off. Thus, the accumulation of the deposit on the wall surface of the injection hole 13 can be inhibited by the simple structure. COPYRIGHT: (C)2009,JPO&INPIT
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