Exhaust gas temperature raising apparatus and a method for removal of fuel supply valve clogging

摘要

The present invention is intended to provide a technique which serves to suppress unburnt HC from being discharged to a downstream side, when fuel is injected from a fuel supply valve for removing clogging thereof. The present invention is provided with a fuel supply valve that supplies fuel to an exhaust passage of an internal combustion engine, and an ignition unit that ignites the fuel supplied from the fuel supply valve, wherein in cases where there is a possibility that clogging may occur in an injection hole of the fuel supply valve, fuel for removal of clogging is injected from the fuel supply valve. An amount of the fuel to be injected from the fuel supply valve for removing clogging thereof is an amount of fuel which is able to be combusted by being ignited by means of the ignition unit.

主权项

1. An exhaust gas temperature raising apparatus comprising:
a fuel supply valve that supplies fuel to an exhaust passage of an internal combustion engine; an ignition unit that ignites the fuel supplied from said fuel supply valve, and an ECU, the ECU programmed to:
calculate, as an amount of the fuel to be injected from the fuel supply valve for removing clogging, an amount of fuel which is able to be combusted by being ignited by means of the ignition unit; andcause fuel in the calculated amount to be injected and ignited by the ignition unit so that the clogging is removed, wherein in cases where there is a possibility that clogging may occur in an injection hole of said fuel supply valve, fuel for removal of clogging is injected from said fuel supply valve; and wherein an amount of the fuel to be injected from said fuel supply valve for removing clogging thereof is an amount of fuel which is able to be combusted by being ignited by means of said ignition unit.