EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

There is provided an exhaust purifying system for an internal combustion engine comprising a fuel supply valve (15) for supplying fuel to an exhaust passage (12) for an internal combustion engine (1) of a vehicle, an ignition device (16) for igniting the fuel supplied from the fuel supply valve (15), and a controller (50) for heating the ignition device to selectively realize at least an ignition temperature Ti in which the fuel can be ignited and a waiting temperature Ts in which the fuel cannot be ignited. The controller (50) controls the waiting temperature Ts to be the lower as a predicted deceleration time tp that is the time for which a decelerating state of the vehicle lasts is larger.