F - Mech Eng,Light,Heat,Weapons – 02 – B
Patent
F - Mech Eng,Light,Heat,Weapons
02
B
F02B 75/16 (2006.01) F01B 1/01 (2006.01) F01B 31/10 (2006.01) F01B 31/28 (2006.01) F02B 63/02 (2006.01) F02B 75/02 (2006.01)
Patent
CA 2180497
A single cylinder, internal combustion engine with a dry sump lubrication system. The engine includes an engine housing in which the overhead camshaft (40) and crankshaft (42) are rotatably supported, and the housing includes an integrally formed cylinder (22) and head (24). A timing belt (105) disposed externally of the engine housing interconnects the crankshaft and camshaft, and a piston (46) connected to the crankshaft reciprocates within an internal bore provided in the engine housing cylinder. The cylinder wall (48) around the internal bore is of a generally uniform thickness and circumscribed by cooling fins such that the cylinder resists bore distortion during operation. Dry sump lubrication is obtained by an external oil reservoir (135) connected to a pump (161) which supplies pressurized oil to the bearing journals of the camshaft. The reciprocating motion of the valve assemblies (67, 68) controlling intake and exhaust of the combustion chamber pumps the oil which lubricated the camshaft back to the external reservoir. The reciprocating motion of the piston similarly effects a high pressure within the crankcase cavity to pump oil which has lubricated the crankshaft back to the external reservoir.
Adams Gar M.
Christiansen Erik J.
Molina Roberto
Moorman James W.
Sim & Mcburney
Tecumseh Products Company
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