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Studies on Improvement of Combustion with an Accumulator-type Fuel Infection System Coupled with Pilot Injection

Research Project

Project/Area Number 01550178
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Thermal engineering
Research InstitutionKyushu University

Principal Investigator

WAKURI Yutaro  Professor, Kyushu University, Faculty of Engineering, Department of Mechanical Engineering, 工学部, 教授 (80037704)

Co-Investigator(Kenkyū-buntansha) TAKASAKI Koji  Associate Professor, Kyushu University Faculty of Engineering, Department of Mec, 工学部, 助教授 (30154769)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1990: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1989: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsCompression Ignition Engine / High pressure fuel injection / Pilot injection / Particulate / Pre-mixed Combustion / Diffusion Combustion / Fuel spray / Combustion Noise
Research Abstract

Studies have been carried out to examine both the effects of high pressure fuel injection and pilot injection on the improvement of Combustion, that means reductions of BSFC and exhaust smoke density without increase in NO emission, in a Diesel Engine. The effects were clarified not only by operation tests with the test engine equipped with a newly developed accumulator-type fuel injection system, but also from analyses of high sped photographs of fuel spray and flames taken in another test engine with a visualized combustion chamber. As the results of experiment following Conclusions have been obtained.
(1) It is effective on the improvement of combustion characteristics to use the injection nozzle with smaller hole diameter corresponding to the high injection pressure, because of the increase in the excess air ratio of fuel spray.
(2) The pilot/pre injection followed by high pressure injection is effective on reductions of BSFC and exhaust smoke density without increase of NO emission.
(3) Residual fuel spray is more difficult to be dispersed by air swirl and needs high swirl intensity for the optimum combustion than marine diesel oil.
(4) Combustion of impingement of fuel spray on the piston wall and air swirl is an effective means to improve the combustion of residual fuel spray in the diffusion combustion period by talking off the gaseous part and small droplets from the liquid core and supplying the spray with fresh oil.
(5) Increase of combustion air temperature in the combustion chamber improves the combustion of residual fuel spray by accelerating the evaporation of distillate components.
(6) Attention should be paid to the fact that the heat release rate of residual fuels goes down extremely with the increase of ignition delay at low compression air temperature.

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] Yutaro Wakuri 外2名: "Studies on the Fuel Spray Combustion Characteristics in a Diesel Engine by the Aid of Photographic Visualization." Proc.18th International Congress on Combustion Engine(18th CIMAC). Dー18. 157-173 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 和栗 雄太郎 外5名: "可視化による側方噴射方式ディ-ゼル機関の噴霧の燃焼特性に関する研究" 日本機械学会論文集 B編. 55ー515. 2073-2078 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Yutaro Wakuri 外4名: "Studies on Improvement of Combustion with an AccumulatorーType Fuel Injection System Coupled with Pilot Injection." Proc.I.Mech.E.Seminar “Diesel Fuel Injection System". 87-95 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 和栗 雄太郎 外2名: "可視化によるディ-ゼル機関の噴霧燃焼特性の研究" 内燃機関. 28ー361. 33-35 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Yutaro Wakuri 外5名: "Residual Fuel SprayーEvaporation,Dispersion and Combustion Characteristics." Proc.of COMODIA 90'. 539-544 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Y.X.Yang 外2名: "Interaction between Spray Impingement and Swirl Movement and Its Influence on Combustion in a D.I.Diesel Engine." Proc.of COMODIA 90'. 551-556 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Y. Wakuri, K. Takasaki, K. Tatsumi and K. Maeda: ""studies on improvement of combustion with an accumulator-type fuel injection system"" Proc. I. Mech. E Seminar "Diesel Fuel Injection system". 87-95 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Y. Wakuri, K. Takasaki and Y. X. Yang: ""Studies on the fuel-spray combustion characteristics in a Diesel Engine by the aid of photographic visualization"" ASME ICE-Vol. 10. Book NO. G00505,. 77-85 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Y. Wakuri, K. Takasaki, K. Maeda, X. Y. Yang, H. Okubo and S. Hino: ""Residual Fuel Sprays-Evaporation, Dispersion and Combustion Characteristics"" Proc. of COMODIA. 90. 539-544 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Y. X. Yang, Y. Wakuri and K. Takasaki: ""Interaction between Spray Impingement and Swirl Movement and Its Influence on Combustion in a DI Diesel Engine"" Proc. of COMODIA. 90. 551-556 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Yutaro Wakuri 外2名: "Studies on the Fuel Spray Combustion characteristics in a Diesel Engine by the Aid of Photographic Visualization." Proc.18th International Congress on Combustion Engine(18th CIMAC). Dー18. 157-173 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] 和栗 雄太郎 外5名: "可視化による側方噴射方式ディ-ゼル機関の噴霧の燃焼特性に関する研究" 日本機械学会論文集 13編. 55ー515. 2073-2078 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yutato Wakuri 外4名: "Studies on Improvement of Combustion with an AccumulatorーType Fuel Injection System Coupled with Pilot Injection." Proc.I.Mech.E.Seminar “Diesel Fuel Injection System". 87-95 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] 和栗 雄太郎 外2名: "司視化によるディ-ゼル機関の噴霧燃焼特性の研究" 内燃機関. 28ー361. 33-35 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yutaro Wakuri 外5名: "Residual Fuel SprayーEvaporation,Dispersion and Combustion Characteristics." Proc.of COMODIA 90'. 539-544 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Y.X.Yang 外2名: "Interaction between Spray Impingement and Swirl Movement and Its Influence on Combustion in a D.I.Diesel Engine." Proc.of COMODIA 90'. 551-556 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yutaro Wakuri: "Studies on the Fuel-Spray Combustion Characteristics in a Diesel Engine by the Aid of Photographic Visualization" Proc.18th International Congress on Combustion Engines(18th CIMAC). D-18. 157-173 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 和栗雄太郎: "可視化による側方噴射方式ディ-ゼル機関の噴霧の燃焼特性に関する研究" 日本機械学会論文集13編. 55-515. 2073-2078 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Yutaro Wakuri: "Studies on Improvement of Combustion with an Accumulator-Type Fuel Injection System Coupled with Pilot Injection" Proc.I.Mech.E Seminar "Diesel Fuel Injection Systems". 87-95 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 和栗雄太郎: "可視化によるディ-ゼル機関の噴霧燃焼特性の研究" 内燃機関. 28-361. 33-35 (1989)

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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