METHOD FOR PREDICTING NOX AMOUNT AMD EXHAUST SYSTEM USING THE SAME

摘要

PURPOSE: A method for estimating quantity of NOx(Nitrogen Oxide) and an exhaust device using the same are provided to exactly estimate amount of the NOx included in exhaust gases by correcting the quantity of the NOx according to environmental factors and amount of intake air. CONSTITUTION: A method for estimating quantity of NOx(Nitrogen Oxide) is as follows. Amount of O2 in suction air is detected (S300). The reference amount of the O2 in the suction air is calculated according to an operation condition of an engine(S310). The reference amount of NOx in exhaust gases is calculated according to the operation condition of the engine(S320). The reference amount of NOx is corrected firstly according to the reference amount of O2 in the suction air based on the operation condition of the engine(S330).