Mixture-lubricated four-stroke engine
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United States of America Patent
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Oct 13, 2020
Grant Date -
Jul 18, 2019
app pub date -
Jan 16, 2019
filing date -
Jan 17, 2018
priority date (Note) -
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Abstract
A mixture-lubricated four-stroke engine has a cylinder and a piston. On the piston, at least one piston ring is arranged. Between valve drive chamber and crankcase interior, at least one first channel is arranged. The first opening of the first channel lies in the bottom dead center position of the piston below each piston ring. At the first opening, the first channel defines a first middle flow direction for mixture flowing into the crankcase interior. The first middle flow direction extends inclined towards the combustion chamber and in a viewing direction perpendicular to the cylinder longitudinal plane intersects the longitudinal center axis above the first opening of the first channel.
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