| 摘要 |
An exhaust passageway of the internal combustion engine is formed of a single exhaust pipe 5 . A portion 11 b configuring a passageway through which the exhaust gas passes and a portion 11 c provided with a catalyst 11 e heating up the exhaust gas by emitting heat upon being supplied with a reducing agent, are provided in parallel so as to share a section of the single exhaust pipe with each other on an upstream side 11 of an exhaust gas purifying device 10 in the exhaust pipe 5 . In the exhaust gas flowing through the exhaust pipe 5 , allocation of a quantity of the exhaust gas passing through the catalyst 11 e and a quantity of the exhaust gas passing through the passageway 11 b, is set changeable. |
