Spark ignition type internal combustion engine

Details Spark ignition type internal combustion engine Spark ignition type internal combustion engine

F - Mech Eng,Light,Heat,Weapons

02

D

F02D 15/04 (2006.01) F02D 9/02 (2006.01) F02D 13/02 (2006.01) F02D 41/08 (2006.01) F02D 43/00 (2006.01)

Patent

CA 2695694

In an internal combustion engine, a variable compression ratio mechanism (A) able to change a mechanical compression ratio and a variable valve timing mechanism (B) able to control the closing timing of an intake valve (7) 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.

L'invention concerne un moteur à combustion interne qui comprend un mécanisme à taux de compression variable (A) capable de faire varier le taux de compression mécanique et un mécanisme de réglage de distribution variable (B) capable de commander la temporisation de fermeture d'une soupape d'admission (7). Lors d'une plage de fonctionnement à faible charge, à l'exception d'un fonctionnement au ralenti, le taux de compression mécanique est maintenu à un taux de compression mécanique maximal, et dans le fonctionnement au ralenti, le taux de compression mécanique est inférieur au taux de compression mécanique maximal.

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