Efficiency Improvement in Exhaust Heat Recirculation System

高効率排気熱回収装置の開発

In order to speed up engine coolant warm-up, the exhaust heat recirculation system collects and reuses the heat from exhaust gases by utilizing the heat exchanger. The conventional system improves actual fuel economy at the scene of the engine restart in winter season only. The heat recirculation system becomes more effective at the low outside temperature because it takes longer time to warm up engine coolant. However, the heat recirculation system becomes less effective at the high outside temperature because it takes shorter time to warm up engine coolant. Therefore, the new exhaust heat recirculation system is developed, the authors adopted new devices as follows: 1) A fin-type heat exchanger in order to enhance exhaust recirculation efficiency 2) A thinner heat exchanger component and smaller amount of engine coolant capacity in the heat exchanger in order to reduce the heat mass As a result, the actual fuel economy is more improved in winter season. In addition, even at the high outside temperature seasons, the actual fuel economy is improved. Due to the change mentioned above, the weight of the heat exchanger is reduced by 20% compared to the heat exchanger in the conventional system.廃熱である排気ガス損失熱量を熱交換器で回収再利用し，エンジン冷却水の昇温を早めることで燃費向上を図る排気熱再循環システムにおいて，(1)熱交換器の高効率化（フィンチューブ式を採用），(2)熱交換器の熱容量低減に取り組み，効果を更に向上させた．

• Record URL:
  https://doi.org/10.11351/jsaeronbun.47.1169
• Record URL:
  http://scholar.google.com/scholar_lookup?title=Efficiency%20Improvement%20in%20Exhaust%20Heat%20Recirculation%20System&author=T.%20Murata&author=T.%20Nakagawa&author=H.%20Nishino&author=K.%20Matsuura&publication_year=2016
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02878321
• Authors:
  • Murata, Toshio
  • Nakagawa, Tadashi
  • Nishino, Hisashi
  • Matsuura, Kazunari
• Publication Date: 2016

Language

• English
• Japanese

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: pp 1169-1175
• Serial:
  • Transactions of Society of Automotive Engineers of Japan
  • Volume: 47
  • Issue Number: 5
  • 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: Coolants; Energy; Energy resources; Environment; Fuel consumption; Heat exchangers; Motor vehicles; Thermal efficiency
• Subject Areas: Energy; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01664760
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Mar 29 2018 9:33AM