Internal combustion engine control apparatus

Abstract

There is provided an internal combustion engine control apparatus that can more accurately calculate a volume efficiency correction coefficient and can more accurately estimate the amount of air that flows into a cylinder and the external exhaust gas recirculation amount. In an internal combustion engine provided with an exhaust gas recirculation apparatus including an exhaust gas recirculation valve and an exhaust gas recirculation path, based on a cylinder flow rate, an exhaust gas recirculation amount, an inner-intake-pipe density, and an inner-intake-pipe density changing amount, a volume efficiency correction coefficient, as a volume efficiency corresponding value, is calculated; then, by use of the calculated volume efficiency correction coefficient, a cylinder intake air amount and a recirculation amount of exhaust gas that is taken into the cylinder are calculated.

Description

technical field [0001] The invention relates to a control device of an internal combustion engine, and more specifically, relates to an internal combustion engine control device for accurately calculating the amount of air sucked into a cylinder and the return flow of exhaust gas sucked into a cylinder. Background technique [0002] In order to properly control the internal combustion engine (also referred to as an engine, but referred to as an internal combustion engine in the following description), the amount of air sucked into the cylinder is calculated with high precision, and the amount of air drawn into the cylinder is calculated accordingly. Fuel control and ignition timing control are more important. As for fuel control, generally good control characteristics can be obtained as long as feedback control can be performed so as to inject the fuel amount that achieves the target air-fuel ratio relative to the air intake into the cylinder, and regarding ignition timi...

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Problems solved by technology

[0004] In addition, regarding the above-mentioned internal combustion engine having the intake and exhaust VVT which can make the valve opening and closing timing of the intake valve and exhaust valve variable, since the amount of air sucked into the cylinder from the intake manifold will be greatly increased depending on the valve timing Therefore, if the influence of valve timing is not considered, the calculation accuracy of the amount of air sucked into the cylinder may decrease

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