Knock resistant split-cycle engine and method

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

Patent

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Details

F02B 33/22 (2006.01) F02B 29/04 (2006.01) F02B 75/02 (2006.01) F02D 3/00 (2006.01) F02D 23/02 (2006.01)

Patent

CA 2696038

An engine has a rotatable crankshaft. A compression piston is received within a compression cylinder and operatively connected to the crankshaft such that the compression piston reciprocates through an intake stroke and a compression stroke during a single rotation of the crankshaft. An expansion piston is received within an expansion cylinder and operatively connected to the crankshaft such that the expansion piston reciprocates through an expansion stroke and an exhaust stroke during a single rotation of the crankshaft. A crossover passage interconnects the compression and expansion cylinders. The crossover passage includes a crossover compression valve and a crossover expansion valve defining a pressure chamber therebetween. A fuel injector is disposed in the pressure chamber of the crossover passage. Fuel injection from the fuel injector into the crossover passage is timed to occur entirely during the compression stroke of the compression piston.

La présente invention concerne un moteur comportant un vilebrequin rotatif. Un piston de compression est reçu dans le cylindre de compression et relié en fonctionnement au vilebrequin de sorte que le piston de compression se déplace en va-et-vient via une course d'admission et une course de compression lors d'une rotation unique du vilebrequin. Un piston de détente est reçu dans le cylindre de détente et relié en fonctionnement au vilebrequin de sorte que le piston de détente se déplace en va-et-vient via une course de détente et une course d'échappement lors d'une rotation unique du vilebrequin. Un passage d'intercommunication assure une interconnexion entre les cylindres de compression et de détente. Le passage d'intercommunication comporte une soupape d'intercommunication et une soupape de détente définissant entre elles une chambre de pression. Un injecteur de carburant est disposé dans la chambre de pression du passage d'intercommunication. Une injection de carburant provenant de l'injecteur de carburant pour pénétrer dans le passage de transfert est synchronisée pour se produire complètement lors de la course de compression du piston de compression.

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