| 摘要 |
<p>A method according to the present invention heats exhaust introduced to an exhaust emission purifier (26) by injecting fuel into an exhaust passage (23a) through a fuel addition valve toward a heat generating portion (28a) of a glow plug (28) disposed in the exhaust passage located upstream of the exhaust emission purifier, and then igniting the fuel. In the method, a rate of the fuel injected through the fuel addition valve (27) which directly contacts the heat generating portion (28a) is set to between 8% and 55%.</p> |
