INTAKE AIRFLOW RATE MEASURING APPARATUS FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To detect an intake airflow rate with high accuracy by a method of changing the operational characteristic of an intake valve to control the intake airflow rate. SOLUTION: The proportion of fresh airηn and the effective exhaust amount Ve of a cylinder part are calculated from read detection values of various sensors (S1) and the operational characteristic of the intake valve (S2, S3), and then the intake airflow rate (mass airflow rate) Qc of the cylinder part is calculated based on the calculated values (S4).