| 摘要 |
A fuel injection valve can be provided, with which temperature at needle valve seating position can be decreased and carburization of fuel and deposition of the carbide near the needle valve seating position can be prevented resulting in stable normal fuel injection control, and which is applicable to small and middle and also to large engines, particularly gas engines. The fuel injection valve is composed such that distance (A) from a seating face of the nozzle in the nozzle supporting body to a seating position of the needle valve in the nozzle is determined to be smaller than distance (B) from the nozzle seating face in the nozzle supporting body to the lower end of clearance between a nozzle insertion hole of the nozzle supporting body and a fitting part of the nozzle inserted into the nozzle insertion hole, thereby suppressing heat flow to the needle valve seating position.
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