| 摘要 |
<p>PROBLEM TO BE SOLVED: To suppress generation of soot from the start of operation of an engine till the stoppage thereof. SOLUTION: A first combustion in which an amount of inert gas in a combustion chamber 5 is larger than that of inert gas at which an amount of generation of soot reaches a peak so that soot is hardly generated, and a second combustion in which the amount of inert gas in the combustion chamber 5 is smaller than that of inert gas at which an amount of generation of soot reaches a peak, is selectively performed. When catalyst 19 with an oxidizing function provided in an exhaust passage of the engine is inactive, the second combustion is performed. When the catalyst with the oxidizing function provided in the engine exhaust passage is active, either the first combustion or the second combustion is performed.</p> |
