| 摘要 |
PROBLEM TO BE SOLVED: To secure appropriate durability of an intake control valve by regulating the number of opening/closing of the intake control valve in consideration of an actual operating state. SOLUTION: The intake control device calculates (S1-S3) an integrated travel distance and the integrated number of valve opening/closing of the intake control valve. When the integrated travel distance is not larger than the set distance D1, and the integrated number of valve opening/closing exceeds the number threshold valueη, or the frequency of opening/closing exceeds the frequency threshold valueγ, the intake control device sets (S8, S7) a fixed flag. On the other side, when the integrated travel distance exceeds the set distance D1, the control device sets (S12) the fixed flag when the frequency of opening/closing exceeds the frequency threshold valueα, and releases (S11) the fixed flag when the frequency of opening/closing is less than the frequency thresholdβ. The number of opening/closing of the intake control valve can be regulated thereby in consideration of the actual operating state, and the appropriate durability of the intake control valve can be secured. COPYRIGHT: (C)2009,JPO&INPIT
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