| 摘要 |
PROBLEM TO BE SOLVED: To correct variation in intake air amount caused by assembly error or the like of a variable valve system. SOLUTION: The intake valve drive control device has, as a variable valve system, a lift and working angle variable mechanism continuously and variably controls lift and working angles, and a phase variable mechanism for continuously and variably controls phase of lift center angle, so as to control to be a target working angle and a target phase depending on operational statuses. A working angle learning correction value and a phase learning correction value are added respectively to each target value to correct initial variation caused by the assembly error or the like. Since the intake air amount is mainly set by the lift and working angles when lift is small, learning of the working angle learning correction value is updated during operation within an area A on a low-speed and low-load side where a working angleθis smaller than a predetermined threshold valueθ1, and the phase learning correction value is updated during operation within an area B where the working angleθis the threshold valueθ1 or more. COPYRIGHT: (C)2005,JPO&NCIPI
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