| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology capable of setting the ignition timing of a premixed air-fuel mixture in a transient operation to a more suitable timing in a premixed compression ignition combustion internal combustion engine. SOLUTION: In a stationary operation, the EGR rate of intake air in one intake air port (intake air port in which a first intake air valve is installed) is set higher than the EGR rate of intake air in the other intake air port (intake air port in which a second intake air valve is installed). When an operation comes into the transient operation in which an EGR gas amount in a cylinder is increased, the lift amount of the other intake valve (second intake valve) is reduced for a specified time. COPYRIGHT: (C)2005,JPO&NCIPI
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