| 摘要 |
PROBLEM TO BE SOLVED: To optimize operating conditions of an engine while inhibiting knocking even if an environmental conditions influencing the control of the engine changes. SOLUTION: This knocking control device for the engine 10 provided with a variable valve timing mechanism 11 for an intake valve, is provided with a valve timing determination part 54 determining valve timing of the intake valve and a knocking detection part 52 detecting knocking. When knocking is detected, the valve timing determination part 54 shifts valve timing of the intake valve in a direction reducing intake air quantity to a combustion chamber of the engine 10 by predetermined quantity to reduce filling efficiency in to the combustion chamber. Consequently, knocking can be inhibited even if trace knock ignition timing is shifted to an advancing side and knocking occurs due to change of the environment condition. COPYRIGHT: (C)2009,JPO&INPIT
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