Spark ignition type internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsDaisaku Sawada, Yukihiro Nakasaka, Daisuke Akihisa, Eiichi Kamiyama
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Abstract
In an internal combustion engine, a variable compression ratio mechanism able to change a mechanical compression ratio and a variable valve timing mechanism able to control the closing timing of an intake valve are provided. The mechanical compression ratio is made to be the maximum mechanical compression ratio at low load operation regions excluding idling operation, while during idling operation, the mechanical compression ratio is made lower than the maximum mechanical compression ratio.
Claims9
A spark ignition type internal combustion engine provided with a variable compression ratio mechanism able to change a mechanical compression ratio and a variable valve timing mechanism able to control a closing timing of an intake valve, wherein the mechanical compression ratio at the majority of a low load operation region excluding idling operation is made a compression ratio higher than during high load operation, and the mechanical compression ratio during idling operation is made lower than the mechanical compression ratio for the majority of a low load operation region excluding idling operation.
Dependencies are inferred from the claim text.