| 摘要 |
A variable valve timing control apparatus includes a variable valve timing device and a valve timing controller to control the variable valve timing device in a manner that an actual VCT phase coincides with a target VCT phase. When the target VCT phase is set into a predetermined phase, learning means learn the predetermined phase as a reference phase. When determining means determine that there is a learning requirement of the reference phase, enlarging means enlarge an engine operation area where the target VCT phase is set into the reference phase by shifting the target VCT phase to the reference phase in an area where the target VCT phase is close to the reference phase.
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