Japanese
Development aims
Prevents damage caused to bearings by foreign particles (scratches) by discharging outside the bearings foreign particles still remaining when the engine is assembled and foreign particles that encroaches when the engine undergoes an overhaul or embedding such foreign particles in the relief groove.
Development concept
Concept
Design
1.Improved protrude and eject performance due to an enlarged chamfer on the mating surface
2.Improved eject performance and supplementation due to an enlarged crush relief angle
3.Improved protrude performance due to the presence of a dust pocket
Performance
Handling of foreign particles
| State of initiative | Standard | Foreign particles discharge design A | Foreign particles discharge design B |
|---|---|---|---|
| Chamfer of the mating surface | Standard | Enlarged | Enlarged |
| Crush relief length and depth | Standard | Enlarged | Enlarged |
| Dust pocket | Without | Without | Present |
A design for discharging foreign particles helps reduce deep scratches of 10 μm or more by approximately 90%.
