NOx EMISSION CALCULATION DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a NOx emission calculation device of an internal combustion engine capable of calculating a NOx emission of the internal combustion engine with high accuracy even in transition.

SOLUTION: A NOx amount N is calculated as a value simulating the change of actual boost pressure P by obtaining a correction coefficient K=1-α(Pmap-P)/Pmap reflecting a delay characteristic of the actual boost pressure P with respect to a boost pressure map value Pmap and by multiplying a NOx amount map value Nmap obtained from a map by the correction efficient K in vehicle acceleration (Pmap-P>0).

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