Floating piston, piston-valve engine

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

Patent

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Details

F02B 75/04 (2006.01) F02B 41/00 (2006.01)

Patent

CA 2234150

A drive train includes an engine having a power cylinder (12) with a power piston (4). Fuel is fed into a combustion chamber (2) located within the power cylinder at one side of the power piston. Intake and exhaust valves (16, 18), in fluid communication with the combustion chamber serve, respectively, to allow intake of air during an intake stroke of the power piston and exhaust of combustion products during an exhaust stroke of the power piston. A floating piston (5) at least partially closes the combustion chamber opposite the power piston and is mounted for reciprocating motion relative to the combustion chamber. The reciprocating motion of the floating piston includes a pressure relieving stroke in which the floating piston moves away from the combustion chamber responsive to a predetermined pressure being produced within the combustion chamber by combustion, to reduce the peak combustion pressure.

Train d'entraînement comprenant un moteur possédant un cylindre moteur (12) comportant un piston moteur (4). Le carburant est introduit dans une chambre de combustion (2) située à l'intérieur du cylindre moteur au niveau d'un côté du piston moteur. Des soupapes d'admission et d'échappement (16, 18) en communication fluide avec la chambre de combustion, servent respectivement à permettre l'admission d'air pendant une course d'admission du piston moteur et l'échappement des produits de combustion pendant une course d'échappement dudit piston. Un piston flottant (5) ferme au moins partiellement la chambre de combustion à l'opposé du piston moteur et est monté de façon à effectuer un déplacement alternatif par rapport à la chambre de combustion. Le déplacement alternatif du piston flottant comprend une course de relâchement de pression dans laquelle le piston flottant s'éloigne de la chambre de combustion en réaction à l'apparition d'une pression prédéterminée dans la chambre de combustion sous l'effet d'une combustion, afin de limiter la pression de combustion de pointe.

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