Fuel injection amount control apparatus for internal combustion engine with exhaust gas recirculation

摘要

A fuel injection amount control apparatus for an internal combustion engine performs exhaust gas recirculation and limits a fuel injection amount required for the internal combustion engine based on a smoke limit fuel injection amount that is set according to an intake air amount for suppressing generation of smoke. The apparatus comprises limiting means for calculating an EGR smoke limit fuel injection amount (QAFMmin) which is permitted considering both an intake air amount and an exhaust gas recirculation amount, based on an operating state of the internal combustion engine, and limiting the fuel injection amount required for the internal combustion engine based on the larger value of the EGR smoke limit fuel injection amount and the smoke limit fuel injection amount (QAFM).