An estimation device for a cylinder intake air amount in an internal combustion engine can estimate a cylinder intake air amount to a sufficient accuracy for suitable engine control, in either of steady state operation and transient operation with a small number of adaptation constants and a small amount of calculation load, without requiring a huge memory capacity. The relation between an opening degree and an effective opening area of a throttle valve has been learned, while calculating the cylinder intake air amount in an S/D method from a volumetric efficiency correction factor map adapted by valve timing at the time of steady state operation, and in a period from a transient change until an exhaust manifold temperature is converged, an intake air amount is calculated based on the relation thus learned. The cylinder intake air amount is calculated based on a physical model of an intake system response delay.
Estimation device for cylinder intake air amount in an internal combustion engine
2016-01-05
Patent
Electronic Resource
English
Cylinder intake air amount estimation apparatus for internal combustion engine
European Patent Office | 2016
|INTAKE DUCT STRUCTURE OF INTERNAL COMBUSTION ENGINE, AND INTERNAL COMBUSTION ENGINE
European Patent Office | 2017
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