Development aims

Reduce the amount of oil supplied with the main bearing
→Enables downsizing of the oil pump and securing of hydraulic pressure without compromising bearing performance

Development concept

Side leakage near the mating surface that does not contribute to lubrication and cooling is reduced by making the oil groove shallower.

Conventional groove

Side leakage from the crush relief is a common occurrence.

Eccentric groove

Side leakage is reduced by gradually diminishing
the depth of the oil groove.


Oil Reduction Effect

Oil pressure improvement effect