| 摘要 |
PROBLEM TO BE SOLVED: To prevent stopper contact due to oscillation (fluctuation) of oil pressure and the like in a valve timing control device variable controlling one or both of valve timing of an intake valve and valve timing of an exhaust valve by the oil pressure.SOLUTION: For example, if target valve timing of the intake valve (IN temporary target value) enters a use limit region Din from a normal use region Dnor, the actual valve timing of the intake valve (IN actual target value) is limited to an upper limit value α of the use limit region Din and the actual valve timing of the exhaust valve (EX actual target value) is controlled so as to keep target overlap. The IN, EX actual valve timing is controlled not to enter the use limit regions Din, Dex and the stopper contact is prevented by controlling the IN actual target value and the EX actual target value in such a manner. |
