INTERNAL COMBUSTION ENGINE AIR VOLUME ESTIMATION DEVICE

摘要

An air volume estimation device inputs an output volume Vafm of an air flowmeter (61) arranged in an intake path at the upstream of a compressor (91a) into an AFM inverse model (M1), thereby estimating an air flow rate actually flowing into a compressor (compressor flow-in air flow rate) mcmi whose detection delay is compensated. According to the estimated actual compressor flow-in air flow rate mcmi employed as an air flow rate flowing out factually from the compressor at the current point and a first air model (M10) and a second model (M20) describing the air behavior in the intake path at the downstream of the compressor according to the physical law, the device estimates an air volume introduced into a cylinder (in-cylinder air volume) KLfwd at the point preceding the current point.