Combustion Improvement in High Speed Small DI Diesel Engine - 1st Report : Cause of Exhaust Smoke in High-Speed and Full-Load Conditions -
小型高速DIディーゼルの燃焼改善ー第１報 高速・全負荷時のスモーク生成要因ー
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20004338
- Paper/Info type
- JSAE Transaction
Vol.31 No.3
- Pages
- 11-16(Total 6 p)
- Date of publication
- Jul 2000
- Publisher
- JSAE
- Language
- Japanese
Detailed Information
| Category(J) | 研究論文 Translation |
|---|---|
| Category(E) | Research Paper |
| Author(J) | 1) 堀田 義博, 2) 中北 清己, 3) 稲吉 三七二, 4) 冬頭 孝之, 5) 渡部 哲 |
| Author(E) | 1) Yoshihiro Hotta, 2) Kiyomi Nakakita, 3) Minaji Inayoshi, 4) Takayuki Fuyuto, 5) Satoshi Watanabe |
| Affiliation(J) | 1) 豊田中央研究所, 2) 豊田中央研究所, 3) 豊田中央研究所, 4) 豊田中央研究所, 5) トヨタ自動車 |
| Abstract(J) | 4000rpmでの全負荷定常運転およびシャドウグラフ燃焼観察が可能な単筒機関を開発し，高速高負荷時の燃焼経過の特徴とスモーク生成メカニズムを明らかにした。すなわち高速時には噴霧の壁面衝突による混合作用がないうえ，気流速度の増大によりらせん渦が形成されないためにキャビティ内の空気を有効に利用できない。 Translation |
| Abstract(E) | Combustion processes of a small DI diesel engine with a small-hole nozzle are analyzed in high-speed and heavy-load conditions, using both an optically accessible engine and a performance test single-cylinder engine. With these conditions, fuel sprays are easily pushed away by a strong swirl. Therefore, hard impingement of fuel vapor on the cavity wall and spiral air motion in the cavity are not realized, which are typical under the middle-speed condition and considered as main factors of promoting fuel-air mixing. In addition, flame is immediately flown out to the squish area by a strong reverse squish. Hence, the air in the cavity is not used effectively, which remarkably increases the smoke under these conditions. |
