Smoothing of Anodic Oxide Film on Piston Top Ring Groove
ピストンTOPリング溝部における陽極酸化皮膜の平滑化
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20266406
- Paper/Info type
- Proceedings (Autumn)
No.175-26
- Pages
- 1-6(Total 6 p)
- Date of publication
- Oct 2026
- Publisher
- JSAE
- Language
- Japanese
- Event
- 2026 JSAE Annual Congress (Autumn)
Detailed Information
| Author(J) | 1) 村上 春彦, 2) 藤田 昌弘, 3) 鈴木 慎也 |
|---|---|
| Author(E) | 1) Haruhiko Murakami, 2) Masahiro Fujita, 3) Shinya Suzuki |
| Affiliation(J) | 1) スズキ, 2) スズキ, 3) スズキ |
| Affiliation(E) | 1) Suzuki Motor, 2) Suzuki Motor, 3) Suzuki Motor |
| Abstract(J) | 直噴エンジンにおける始動直後のPN排出増加に対し，ピストントップリング溝部の陽極酸化皮膜の平滑化による低減効果を検証した．実機試験により，溝部の表面粗さ（Ra, Rpk）とPN排出量に強い相関を確認した．また，交直重畳法は直流法よりも均質な皮膜を形成することを見出した．本研究では量産化を見据えた極低圧ショットブラスト法による平滑化技術を提案し，PN低減への有効性を示した． Translation |
| Abstract(E) | This study investigates the effect of smoothing the anodic oxide film on piston top ring grooves to reduce particulate number (PN) emissions immediately after cold start in direct-injection gasoline engines. Engine tests reveal a strong correlation between groove surface roughness (Ra, Rpk) and PN emissions, suggesting that roughness reduction effectively mitigates PN generation. We also confirmed that the superimposed AC/DC anodic oxidation method forms a more homogeneous film than the conventional DC method. Furthermore, we propose an ultra-low-pressure shot blasting technique aiming at mass-production applicability, which successfully reduces Ra and Rpk. This process improves oil behavior, demonstrating significant potential for suppressing PN emissions. |
