Development of Combustion Technology for Improving Scavenging Process and for Reducing Catalyst Warm-Up Time in a High-Compression-Ratio Gasoline Engine

高圧縮比ガソリンエンジンの掃気性改善と触媒早期暖機のための燃焼技術開発

The high compression ratio is effective in improving the thermal efficiency for a spark-ignition gasoline engine. However, the exhaust emissions are deteriorated by the increased catalyst warm-up time, which results from (1) the reduced exhaust gas temperature caused by the elevated expansion ratio and (2) the elongated exhaust pipe for better scavenging efficiency. To meet the stringent emission regulations, the technology development was conducted for retarding the combustion phasing and for improving the scavenging process in a high-compression-ratio engine. The results show that both high environmental performance and high engine torque are achieved.高圧縮比エンジンは熱効率が向上する一方，高膨張比による排ガス温低下とトルク向上を狙ったロング排気系により触媒昇温時間が増加する．このため従来技術では排気ガス規制への適合が困難である．そこで，新たなリタード燃焼技術を掃気性の改善と合わせて開発し，優れた環境性能と高トルクの両立を実現した．

• Record URL:
  https://doi.org/10.11351/jsaeronbun.43.351
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Development+of+Combustion+Technology+for+Improving+Scavenging+Process+and+for+Reducing+Catalyst+Warm-Up+Time+in+a+High-Compression-Ratio+Gasoline+Engine&author=T.+Fujikawa&author=T.+Youso&author=K.+Uchida&author=Y.+Nakayama&author=M.+Yamakawa&publication_year=2012
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02878321
• Authors:
  • Fujikawa, Tatsuya
  • Youso, Takashi
  • Uchida, Kenji
  • Nakayama, Yoshiteru
  • Yamakawa, Masahisa
• Publication Date: 2012

Language

• English
• Japanese

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: pp 351-356
• Serial:
  • Transactions of Society of Automotive Engineers of Japan
  • Volume: 43
  • Issue Number: 2
  • Publisher: Society of Automotive Engineers of Japan
  • ISSN: 0287-8321
  • EISSN: 1883-0811
  • Serial URL: https://www.jstage.jst.go.jp/browse/jsaeronbun
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Catalysts; Combustion; Engine efficiency; Exhaust gases; Heat engines; Spark ignition engines
• Subject Areas: Environment; Highways; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 01526494
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: May 29 2014 9:27AM