| 摘要 |
A problem of the present invention is to provide an engine exhaust treatment device which can burn PM accumulated in a DPF immediately after engine startup and during light load operation, or enable activation of an exhaust-purifying catalyst. To resolve this problem, a combustible gas supply passage (8) is arranged in communication with an exhaust passage (4) upstream of a combustion catalyst (5), an air supply means (9) and an ignition means (10) are provided to the combustible gas supply passage (8), the air supply means (9) and the ignition means (10) are linked to a control means (11), the control means (11) supplies air (12) to combustible gas (2) by the air supply means (9) when the exhaust temperature is lower than a predetermined temperature, the combustible gas (2) is ignited by the ignition means (10), the combustible gas (2) is made to undergo flaming combustion, and the temperature of exhaust (6) in the exhaust passage (4) is raised by the heat of this flaming combustion. |
