Cooling Loss Reduction in a High-Compression-Ratio HD Diesel Engine with an Optimized Combustion Chamber and a High Flow Rate Nozzle
高圧縮比大型ディーゼル機関における最適燃焼室形状および高流量ノズルによる冷却損失低減
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20266319
- Paper/Info type
- Proceedings (Autumn)
No.159-26
- Pages
- 1-2(Total 2 p)
- Date of publication
- Oct 2026
- Publisher
- JSAE
- Language
- Japanese
- Event
- 2026 JSAE Annual Congress (Autumn)
Detailed Information
| Author(J) | 1) 向山 智之, 2) 内田 登 |
|---|---|
| Author(E) | 1) Tomoyuki Mukayama, 2) Noboru Uchida |
| Affiliation(J) | 1) 新エィシーイー, 2) 新エィシーイー |
| Affiliation(E) | 1) New A.C.E. Institute, 2) New A.C.E. Institute |
| Abstract(J) | 大型商用ディーゼル機関の更なる熱効率向上には，高圧縮比化と，増加する冷却損失を画期的に低減する必要がある．本研究ではまず圧縮比23.5の燃焼室形状設計を数値シミュレーションで検討し，得られた指針を圧縮比26の設計へ応用した．さらに高流量ノズルと組合せ，単気筒実機評価により冷却損失低減効果を確認した． Translation |
| Abstract(E) | To achieve even higher thermal efficiency in heavy-duty commercial diesel engines, achieving a higher compression ratio and developing novel designs and technologies, which can drastically reduce escalating cooling loss with increased compression ratio, are essential. In this study, following numerical investigation of an optimized combustion chamber geometry at a compression ratio of 23.5, the achieved design guideline was applied to a compression ratio of 26. As a result, significant cooling loss reduction effect was also experimentally confirmed with the prototype high-compression-ratio piston combined with a high flow rate nozzle with larger orifice diameter by utilizing a single-cylinder heavy-duty diesel engine. |
