Evaluation of High Compression Ratio Achieved by Extending the Stroke Length on Heavy Duty Diesel Engine
重量車用ディーゼルエンジンのロングストローク化による高圧縮比化の評価
- Delivery
- Available on the other site
- Click here to order.
- Publication code
- 20254116
- Paper/Info type
- JSAE Transaction
Vol.56 No.2
- Pages
- 312-318(Total 7 p)
- Date of publication
- Mar 2025
- Publisher
- JSAE
- Language
- Japanese
Detailed Information
| Category(J) | 論文 Translation |
|---|---|
| Category(E) | Paper |
| Author(J) | 1) 齋藤 大晃, 2) 橋本 宗昌, 3) 石井 義範, 4) 小澤 恒 |
| Author(E) | 1) Hiroaki Saito, 2) Munemasa Hashimoto, 3) Yoshinori Ishii, 4) Hisashi Ozawa |
| Affiliation(J) | 1) いすゞ中央研究所, 2) いすゞ中央研究所, 3) いすゞ中央研究所, 4) いすゞ中央研究所 |
| Abstract(J) | 熱効率改善のために高圧縮比化する場合，燃焼室容積を縮小すると燃焼悪化と熱損失の増加を招き効果が限られる．本研究では単気筒エンジンを用いて燃焼室を変更せずにロングストローク化し圧縮比を高めた．その結果，同等空気過剰率条件では燃焼悪化を伴わず燃焼室容積縮小よりも図示熱効率改善効果が高いことが確認された． Translation |
| Abstract(E) | To improve the thermal efficiency of diesel engines, increasing the compression ratio by extending the stroke length without combustion chamber volume reduction has been suggested as an effective approach by engine combustion CFD simulations. Therefore, experimental evaluation of extended stroke specification about indicated thermal efficiency improvement effects was carried out using a single-cylinder test engine. As a result, extending the stroke length is verified to be an effective approach to improve indicated thermal efficiency, as cooling loss is significantly reduced in high load conditions. In low load conditions, reduction of exhaust loss contributed to improve indicated thermal efficiency. |
