EXHAUST EMISSION CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an exhaust emission control device capable of efficiently performing the forced regeneration of a particulate filter by suppressing the lowering of the temperature of the particulate filter when an engine is stopped.

SOLUTION: This exhaust emission control device comprises a downstream side exhaust gas throttle valve 40 installed in an exhaust passage 18 on the downstream side of the particulate filter 30 and opening and closing the exhaust passage 18 and an exhaust control means 52 closing the downstream side exhaust gas throttle valve 40 when the stop of the engine 1 is detected while the forced regeneration of the particulate filter 30 is performed.

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