| 摘要 |
PROBLEM TO BE SOLVED: To prevent abrasion of a mechanism part for changing an operating state, in a valve system control device for changing the operating state (such as valve timing, and a valve lift amount) of a valve system (intake/exhaust valve). SOLUTION: A position offset inward of a most delayed position or a most advanced position in a mechanism which is restricted by a stopper of a variable valve timing mechanism is set as a most delayed position or a most advanced position in a control. A detected valve phase angle (rotational phase detected value) employs the most delayed angle position in a mechanical detected by a cam angle sensor as a reference. A value acquired by correcting the detected valve phase angle by an offset value is employed as a control valve phase angle used for the control. COPYRIGHT: (C)2005,JPO&NCIPI
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