Internal combustion engine

F - Mech Eng,Light,Heat,Weapons – 02 – B

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F02B 19/08 (2006.01)

Patent

CA 2548289

A high thermal efficiency lean-bum spark-ignition two or four stroke engine operable unthrottled suitable for vehicles using gasoline. It uses an indirect combustion chamber and a transfer orifice (7) aligned to produce a jet of air (40) moving in helical swirl motion around the chamber during the compression stroke. Fuel is injected into the chamber aimed into the air jet to assist rapid vaporisation. The position and orientation of the fuel injector (11) ensures that fuel arrives near the spark plug (9) even under idling conditions and the helical swirl flow ensures the stratification of the ignitable mixture formed near the plug (9).

L'invention concerne un moteur à deux ou quatre temps à allumage commandé, à mélange pauvre et à haute efficacité thermique, pouvant fonctionner sans étranglement, approprié pour des véhicules utilisant l'essence. Ledit moteur utilise une chambre de combustion indirecte et un orifice de transfert (7) aligné afin de produire un jet d'air (40) se déplaçant selon un mouvement tourbillonnaire hélicoïdal autour de la chambre au cours de la course de compression. Du carburant est injecté dans la chambre en direction du jet d'air afin d'aider à une vaporisation rapide. La position et l'orientation de l'injecteur de carburant (11) assurent que le carburant arrive près de la bougie d'allumage (9) même dans des conditions de ralenti et l'écoulement tourbillonnaire hélicoïdal assure la stratification du mélange inflammable formé près de la bougie (9).

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