| 摘要 |
PROBLEM TO BE SOLVED: To generate output torque according to requested torque even if atmospheric pressure changes. SOLUTION: This spark ignition internal combustion engine comprises a variable valve timing mechanism B capable of controlling the closing timing of an intake valve 7 and a variable compression ratio mechanism A capable of changing a mechanical compression ratio. An amount of intake air supplied into a combustion chamber 5 is controlled by controlling the closing timing of the intake valve 7. To obtain output torque according to the required torque even if the atmospheric pressure changes, when the atmospheric pressure falls, the closing timing of the intake valve 7 is made to approach an intake bottom dead center and the mechanical compression ratio is reduced. COPYRIGHT: (C)2008,JPO&INPIT
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