Main bearing for crankshaft of internal combustion engine
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United States of America Patent
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Aug 22, 2017
Issued Date -
N/A
app pub date -
Feb 8, 2016
filing date -
Feb 9, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A main bearing includes first and second half bearings, each having a main cylinder portion and crush relief portions in both circumferential end portions. An oil groove circumferentially extends on an inner circumferential surface only of the first half bearing, one circumferential end portion of the oil groove opens on a circumferential end surface on a front side in a rotation direction, and the other circumferential end portion of the oil groove is positioned in the crush relief portion on a rear side in the rotation direction. The first half bearing includes a transition region between the crush relief portion on the front side in the rotation direction and the main cylinder portion, and the second half bearing includes a transition region between the crush relief portion on the rear side in the rotation direction and the main cylinder portion.
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