Air injection engine

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

Patent

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Details

F02B 33/00 (2006.01) F01L 7/00 (2006.01) F02B 1/00 (2006.01) F17D 3/00 (2006.01)

Patent

CA 2514744

The present internal combustion engine features separate compression and expansion cycles. The engine (10) includes a separate compressor device (13) pressurizing air by a ratio greater than 15 to 1, at least one two stroke combustion cylinder (70) and a compressed air conduit (50) for transferring compressed air from the compressor (13) into the combustion cylinder (70). An air injection valve (72A) injects the compressed air into the combustion cylinder during the second half portion of the return stroke of the combustion cylinder (70). The compressed air is mixed with fuel and combusted for expansion during the power stroke. In this engine (10), compression occurs only to a minor degree in the combustion cylinder (70). Accordingly, the compression ratio of the present engine (10) may be significantly higher or lower than the volumetric expansion ratio of the combustion cylinder thus resulting in corresponding increases in power density or thermodynamic efficiency respectively.

le moteur thermique de la présente invention se caractérise par es cycles de compression et d'expansion distincts. Le moteur comprend un compresseur séparé qui comprime l'air selon à un taux se compression de 15:1, au moins un cylindre de combustion à deux temps et un conduit d'air comprimé qui transfert l'air comprimé provenant du compresseur dans le ou les cylindres de combustion. Un soupape d'injection d'air injecte l'air comprimé dans le cylindre de combustion au cours de la seconde moitié de la course de retour dudit cylindre. Cet air comprimé est mélangé au carburant, brûlé et se dilate pendant une course motrice. Dans ce moteur, la compression ne se produit que dans une faible mesure dans le cylindre de combustion. Par conséquent, le taux de compression du moteur peut être beaucoup plus élevé ou beaucoup plus faible que le taux de dilatation volumétrique du cylindre de combustion, ce qui se traduit par des augmentations correspondantes soit de la densité de puissance soit du rendement thermodynamique, respectivement.

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