INTAKE AIR MASS MEASUREMENT DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

Disclosed is an intake air volume measuring device for an internal combustion engine. The device includes an air flow meter located in an intake air path of the internal combustion engine, to measure the volume of intake air into the combustion chamber of the internal combustion engine based on an output signal of the air flow meter. The output signal of the air flow meter (AFM signal) is sampled in synchronism with the crank angle of the internal combustion engine. With this angle-synchronous processing, the device is capable of obtaining AFM data at equal intervals within a cycle of intake air pulsation, thereby eliminating adverse effects of the intake air pulsation. The device is hence capable of reducing variations in AFM data averages and calculating average flow rates of the intake air with high precision.