| 摘要 |
PROBLEM TO BE SOLVED: To inhibit decrease in the torque transition responsiveness of an internal combustion engine during transition when the valve closing timing is set to an early valve closing timing range and a late valve closing timing range and throttling a throttle valve in the process of transition of the valve closing timing between the late closing timing range and the early valve closing timing range. SOLUTION: Before confirming that the response speed of an intake valve closing timing variable mechanism that is determined in a response speed determination process is a predetermined speed or more (when the determination at a step S56 is NO), the intake valve is closed within one of the late closing timing range and the early closing timing range in each cylinder cycle (step S55). When confirming that the response speed is a predetermined speed or more (when the determination of at a step S56 is YES), the late closing process, the early closing process, or the operation region transition process is performed depending on the engine operation state (step S60). COPYRIGHT: (C)2011,JPO&INPIT
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