EXHAUST EMISSION CONTROL DEVICE, EXHAUST EMISSION CONTROL METHOD, AND PARTICULATE MEASUREMENT METHOD

摘要

PROBLEM TO BE SOLVED: To stably purify exhaust gas without deteriorating fuel economy in an exhaust emission control device of a diesel engine.

SOLUTION: This exhaust emission control device comprises a main particulate capture filter installed in the exhaust line of the diesel engine, a sub exhaust line branched from the exhaust line on the upstream side of the main particulate capture filter, a sub particulate capture filter installed in the auxiliary exhaust line and having a soot storage capacity smaller than the soot storage capacity of the main particulate capture filter, and a differential pressure measuring part for measuring the pressure difference produced between the inlet and the outlet of the auxiliary particulate capture filter.

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