| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable valve timing control device for an internal combustion engine capable of preventing the situation that combustion is brought into an unstable state due to a failure in operation of a variable timing mechanism and engine stalling occurs. SOLUTION: This variable valve timing control device decides a failure in operation of a VVT from the following state of an actual cam phase angle to the target phase angle of a set delay angle (at steps S14-S18) when an engine is in, for example, an idling state (at step S12=YES). In this case, when decision of a trouble due to which a valve overlap amount is excessive is established (at step S18=Yes), the opening of an EGR valve is decreased to decrease an external HER amount, and an exhaust gas recirculation factor is reduced by using no VVT (at step S20).
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