| 摘要 |
<p>To suppress clogging of an injection nozzle (50) that supplies fuel to an exhaust passage of an engine (1), a controller (25) executes intermittent addition of fuel from the injection nozzle (50). In executing the intermittent addition, the controller (25) calculates a particulate discharge amount within the exhaust passage based on the engine operation state, and multiplies the exhaust gas temperature by the intake air rate to calculate the exhaust energy. Then, based on the particulate discharge amount and the exhaust energy, the controller (25) calculates the amount of fuel to be added.</p> |
