Exhaust purification control device and exhaust purification system of internal combustion engine
Inactive Publication Date: 2010-05-20
DENSO CORP
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If it is determined that accumulation quantity of deposit on an inner wall of an exhaust passage is equal to or larger than a predetermined value, addition quantity of urea solution from a urea solution addition valve is decreased. Thereafter, exhaust gas temperature is increased rapidly when request torque of a diesel engine increases. Thus, the deposit having accumulated on the inner wall of the exhaust passage is decomposed at once and is supplied to a urea SCR as ammonia.
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