FUEL INJECTION DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To eliminate harmful effects caused by steam of fuel entering a fuel pump 11, while cooling a nozzle 36a of an injector 36 for intake-port injection with the fuel after a stop of an engine 1 to allow formation of deposits to be effectively prevented.SOLUTION: A fuel injection device includes an injector 36 and a fuel pump 11 that supplies fuel to the injector via a fuel supply pipe 10. The fuel injection device includes: a cooling passage 37a that communicates with the fuel supply pipe 10 and cools a nozzle 36a of the injector 36 with circulating fuel; a return pipe 14 for returning fuel to a side of the fuel pump 11; and an electromagnetic valve 15 (on-off valve) that is openable and closable between the fuel supply pipe 10 and the cooling passage 37a. The fuel pump 11 is activated, and the electromagnetic valve 15 is opened to circulate fuel to the cooling passage 37a, during a predetermined period after a stop of an engine. After the predetermined period elapses, the fuel pump 11 is stopped and the electromagnetic valve 15 is closed.