DETERIORATION DETERMINATION APPARATUS FOR AIRFLOW METER AND DETERIORATION DETERMINATION METHOD

摘要

When a deterioration determination apparatus determines a degree of deterioration in characteristics of an airflow meter, a driving condition of an engine is maintained at a specified condition in which intake air flow rate is greater than a specified value. A measurement error of the airflow meter is computed based on an intake air flow rate measured with the airflow meter. The degree of deterioration due to stain is determined based on the measurement error.