Fuel injection valve supporting structure

A fuel injection valve supporting structure in which:

• a nozzle portion at a front end portion of a fuel injection valve projectingly provided with a power supply coupler on one side surface of the fuel injection valve is fitted in an injection valve attachment hole of an engine;
• a fuel supply cap of a fuel distribution pipe supported by the engine is fitted on a fuel introduction portion at a rear end portion of the fuel injection valve;
• a supporting member for biasing the fuel injection valve toward the injection valve attachment hole is interposed between the fuel injection valve and the fuel supply cap, wherein
• a first contact surface and a pair of second contact surfaces are formed in an intermediate portion of the fuel injection valve, the first contact surface being orthogonal to a center axis of the fuel injection valve and opposed to the fuel supply cap, the pair of second contact surfaces opposed to each other with a plane in between, the plane including the center axis and a center line of the coupler, and
• the supporting member includes a base plate, an elastic piece and a pair of turn stopper pieces, the base plate set on the first contact surface, the elastic piece extending from the base plate to elastically come into pressure contact with the fuel supply cap and bias the fuel injection valve toward the injection valve attachment hole by means of reaction force produced by the pressure contact, each turn stopper piece extending from the base plate to come into contact with the second contact surface and restrict a turn of the fuel injection valve about the center axis.