| 摘要 |
PROBLEM TO BE SOLVED: To provide an engine control device capable of avoiding an evil such as knocking caused by a response delay in an operation cycle switching mechanism and thus setting the expansion ratio together with the geometric compression ratio high to sufficiently obtain the improving action of heat efficiency by a high expansion ratio cycle. SOLUTION: When switching to a delay closing mirror cycle from an Otto cycle by adjusting the valve closing timing of an intake valve by a valve timing variable mechanism in response to accelerator stepping, an increase in an intake quantity is slackened by decreasingly correcting a target intake quantity tgtTPS set in response to accelerator opening APS based on a deviationΔIC between the target valve closing timing tgtIC and the actual valve closing timing IC of the valve timing variable mechanism, to prevent a sudden increase in an engine load before switching to the mirror cycle. COPYRIGHT: (C)2010,JPO&INPIT
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