Patent ID: 9322349
Filing Date: 2016-04-26
CPC Classification: F02D,F02M,Y02T

Claim Text:
1. An internal combustion engine control apparatus comprising: an intake air amount detection unit that detects an amount of air that passes through a throttle valve provided in an intake pipe of an internal combustion engine and is taken into the internal combustion engine; a volume efficiency corresponding value calculation unit that calculates a volume efficiency corresponding value as an index that indicates an amount of air that flows from the intake pipe at the downstream side of the throttle valve into a cylinder of the internal combustion engine; a physical model in which an intake-system response delay in an interval from a time point when air passes through the throttle valve to a time point when the air enters the cylinder is modeled; an exhaust gas recirculation path that connects an intake pipe at the downstream side of the throttle valve with an exhaust pipe; an exhaust gas recirculation valve that opens or closes the exhaust gas recirculation path so as to control a recirculation amount of exhaust gas; an exhaust gas recirculation amount calculation unit that calculates the recirculation amount of exhaust gas that passes through the exhaust gas recirculation path and is taken into the intake pipe; and an inner-intake-pipe density detection unit that can detect a density in the intake pipe at the downstream side of the throttle valve and a density change in the intake pipe, as an inner-intake-pipe density and an inner-intake-pipe density changing amount, wherein the volume efficiency corresponding value is calculated based on the intake air amount, the exhaust gas recirculation amount, the inner-intake-pipe density, and the inner-intake-pipe density changing amount, and wherein the amount of air that is actually taken into the cylinder and the recirculation amount of exhaust gas that is actually taken into the cylinder are estimated based on the intake air amount, the volume efficiency corresponding value, and the physical model.