F - Mech Eng,Light,Heat,Weapons – 02 – B
Patent
F - Mech Eng,Light,Heat,Weapons
02
B
171/16
F02B 75/02 (2006.01)
Patent
CA 1187813
TWO-STROKE INTERNAL COMBUSTION ENGINE AND METHOD OF OPERATION THEREOF ABSTRACT OF THE DISCLOSURE An internal combustion engine comprises a combustion chamber and a piston movable relative to the combustion chamber between top dead center and bottom dead center positions. A fuel transfer passage introduces fuel-air mixture into the combustion chamber in response to piston movement. An auxiliary chamber is also provided which is communicable with the combustion chamber in response to piston movement shortly after the ignition of a fuel-air mixture, such that high pressure ignition gases enter the auxiliary chamber. The high pressure ignition gases thereafter flow back into the combustion chamber in response to piston movement before communication is established between the combustion chamber and the fuel transfer passage. The incoming flow of high pressure ignition gases serves to influence the normal scavenging streams. The auxiliary chamber can also junction as an auxiliary transfer passage in response to piston movement to supplement the fuel transfer passage in supplying a new fuel-air mixture charge to the combustion chamber. In one embodiment, an air transfer passage is provided for introducing fresh air into low pressure regions in the cylinder to lend overall stability to the scavenging process.
451139
Outboard Marine Corporation
Smart & Biggar
LandOfFree
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