コモンレール噴射式6ストロークディーゼルエンジンの検討

フォーマット:

論文

責任表示:

橋本, 健 ; 古畑, 朋彦 ; 新井, 雅隆

言語:

日本語

出版情報:

日本機械学会, 2006-09-25

著者名:

• 橋本, 健
• 古畑, 朋彦
• 新井, 雅隆

掲載情報:

日本機械学會論文集. B編

ISSN:

0387-5016    

巻:

72

通号:

721

開始ページ:

2323

終了ページ:

2329

バージョン:

VoR

概要:

application/pdf<br />Journal Article<br />Six-stroke diesel engine proposed here has six processes in one cycle, i.e. intaka, 1st compression, 1st combustion, 2nd compression, 2nd combustion and exhaust. By the effect of direct EGR in the 2nd combustion process, NO concentration could be expected to decrease. However, by a weak mixing in the 2nd combustion process, much soot was exhausted and NO concentration was hardly decreased compared with the … conventional four-stroke diesel engine. To improve the fuel/air mixing at the 2nd combustion process, high pressure injection with common rail system was applied to the engine. As the result, NO concentration was increased owing to the increase of premixed combustion of 1st combustion process, although soot was reduced. Therefore, the 1st injection timing was extremely advanced to control the 1st combustion process. It changed 1st combustion process into HCCI-like combustion, and NO concentration was greatly decreased. Moreover, soot was reduced with no increase of NO concentration in the 2nd combustion process. As the result, trade-off curve of NO and soot was improved compared with the conventional four-stroke diesel engine. But CO concentration was increased. 続きを見る