Double-link piston crank mechanism for internal combustion engine
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United States of America Patent
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Oct 2, 2018
Grant Date -
Jan 25, 2018
app pub date -
Jan 15, 2015
filing date -
Jan 15, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A multi-link piston crank mechanism includes a crank pin bearing portion including a crank pin bearing central portion that is disposed at a center thereof in an axial direction of a crank shaft. The crank pin bearing central portion at a portion positioned on the first end side of the lower link is thicker in a radial direction of the crank pin than a portion positioned on the second end side of the lower link. The second control link end portion is thicker along a radial direction of the second through hole than the second upper link end portion along a radial direction of the first through hole.
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