CLOGGING PREVENTION SYSTEM OF FUEL INJECTION NOZZLE AND CLOGGING PREVENTION METHOD OF FUEL INJECTION NOZZLE

摘要

PROBLEM TO BE SOLVED: To provide a clogging prevention system of a fuel injection nozzle and a clogging prevention method of the fuel injection nozzle, which can prevent adhering of carbon near an injection hole of the fuel injection nozzle of an intra-exhaust pipe fuel injection device which is provided in an exhaust passage of an internal combustion engine.;SOLUTION: A fuel injection nozzle 30 is configured to stop a fuel injection by contacting a valve element 30d, which is arranged outside of an injection hole 30b, with a valve seat 30c which is provided at the outlet of the injection hole 30b, and to perform a fuel injection by separating the valve element 30d from the valve seat 30c to the outside of the injection hole 30b. The fuel injection nozzle is configured to, when a preset condition becomes satisfied, pulsatively inject fuel F and repeat contact and separation of the valve element 30d with the valve seat 30c to remove carbon C adhered near the injection hole 30b.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT