EXHAUST EMISSION CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an exhaust emission control device capable of enhancing the durability through prevention of an excessive temperature rise by regulating the temperature rise when a particulate filter is regenerated through raising its temperature in compliance with the deposit of ash.

SOLUTION: The exhaust emission control device is equipped with a regeneration controlling means 54 to perform regeneration of the particulate filter 36 by supplying the prescribed quantity of HC into the exhaust gas introduced to the filter 36 and raising temperature of the filter 36 with the oxidative reaction heat of the HC and an ash deposit sensing means 56 to sense the deposited amount of the ash on the filter 36, wherein the regeneration controlling means 54 increases gradually the HC supply amount to the prescribed level to the degree according to the ash deposit amount when the regeneration of the filter 36 is started.

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