Two-Cycle Engine
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United States of America Patent
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Issued Date -
Apr 16, 2009
app pub date -
Dec 26, 2006
filing date -
Dec 28, 2005
priority date (Note) -
Abandoned
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Abstract
In a stratified scavenging two-cycle engine 1 whose crankshaft 30 is cantilevered, a crankcase 20 is provided with an opening 23 for housing the crankshaft 30, and a thick wall of the crankcase 20 is provided with a crankcase air passage 24. The opening 23 is fitted with a carburetor mount 50 that allows mounting a carburetor 70. Since the carburetor mount 50 covering the opening 23 of the crankcase 20 functions also as an alternative for a conventional insulator, there is no need to prepare a separate insulator, thereby reducing the number of components. Moreover, since the crankcase 20 is lower in temperature than the cylinder 10 in which combustion takes place, the carburetor mount 50 functioning as an insulator can be thinner, thereby downsizing the engine 1.
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