CLOGGING PREVENTION DEVICE FOR EXHAUST PIPE FUEL INJECTOR

摘要

PROBLEM TO BE SOLVED: To provide a clogging prevention device for exhaust pipe fuel injector which can improve fuel economy compared to the conventional one.SOLUTION: A clogging prevention device for exhaust pipe fuel injector 117 includes a clogging prevention injection performing section 119 for driving an exhaust pipe fuel injector 116, and a clogging prevention injection deferring section 120 for deferring drive of the exhaust pipe fuel injector 116 by the clogging prevention injection performing section 119 until an integrated value of a rotational frequency of an internal combustion engine after driving the exhaust pipe fuel injector 116 reaches a threshold or more even when an exhaust temperature reaches a threshold or more.SELECTED DRAWING: Figure 1