| 摘要 |
PROBLEM TO BE SOLVED: To accurately calculate an intake air quantity for each cylinder without providing a new sensor such as a combustion pressure sensor. SOLUTION: A #X cylinder inner temperature of each cylinder of the internal combustion engine is estimated (step S107), and #X cylinder filling efficiency is calculated based on the #X cylinder inner temperature (step S103). A #X cylinder intake air quantity is calculated based on the ratio of the #X cylinder filling efficiency and the sum of the latest filling efficiency of all the cylinders, and a sensor detecting intake air quantity detected by an intake air quantity sensor (step S104). As such, since the accurately calculated #X cylinder intake air quantity, i.e., the intake air quantity of each cylinder can be used, a combustion state of each cylinder of the internal combustion engine is optimized to improve fuel efficiency and emission. Also, since the intake air quantity of each cylinder is used, a certain cylinder can be operated in a desired condition. COPYRIGHT: (C)2005,JPO&NCIPI
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