Split-cycle four stroke engine

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

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F02B 53/00 (2006.01)

Patent

CA 2528609

An engine (100) has a crankshaft (108), rotating about a crankshaft axis (110) of the engine (100). An expansion piston (114) is slidably received within an expansion cylinder (104) and operatively connected to the crankshaft (108) such that the expansion piston (114) reciprocates through an expansion stroke and an exhaust stroke of a four stroke cycle during a single rotation of the crankshaft (108). A compression piston (116) is slidably received within a compression cylinder (106) and operatively connected to the crankshaft (108) such that the compression piston (116) reciprocates through an intake stroke and a compression stroke of the same four stroke cycle during the same rotation of the crankshaft (108). A ratio of cylinder volumes from BDC to TDC for either one of the expansion cylinder (104) and compression cylinder (106) is substantially 20 to 1 or greater.

La présente invention concerne un moteur (100) comprenant un vilebrequin (108) en rotation autour d'un axe de vilebrequin (110) du moteur (100). Un piston de détente (114) est logé coulissant dans un cylindre de détente (104) et est relié de manière fonctionnelle au vilebrequin (108), de façon à effectuer une course de détente et une course d'échappement d'un cycle à quatre temps, lors d'une seule rotation du vilebrequin (108). Un piston de compression (116) est logé coulissant dans un cylindre de compression (106) et est relié de manière fonctionnelle au vilebrequin (108), de façon à effectuer une course d'admission et une course de compression du même cycle à quatre temps, lors de la même rotation du vilebrequin (108). Le rapport des volumes de cylindre du point mort bas (BDC) au point mort haut (TDC) pour le cylindre de détente (104) et le cylindre de compression (106) est supérieur ou égal à 20 sur 1.

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