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2000 Fiscal Year Final Research Report Summary

Analysis Research for Low Emission Spray Combustion via Fuel Injection Rate Control

Research Project

Project/Area Number 11450084
Research Category

Grant-in-Aid for Scientific Research (B).

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionTokyo Institute of Technology

Principal Investigator

MATSUI Yukio  Tokyo Institute of Technology, Dept. of Mechanical and Aerospace Engrg., Professor, 大学院・理工学研究科, 教授 (50301172)

Co-Investigator(Kenkyū-buntansha) KIMURA Shuji  Nissan Motors, Co., Nissan Research Center, Researcher, 総合研究所, 研究員
KOSAKA Hidenori  Tokyo Institute of Technology, Dept. of Mechanical and Aerospace Engrg., Associate Professor, 大学院・理工学研究科, 助教授 (50225413)
Project Period (FY) 1999 – 2000
KeywordsFuel Injection System / Common Rail / Intermittent Injection / Injection Rate Control / Ignition Delay / Unsteady Diffusion Combustion / Diesel Engine / Rapid Compression Machine
Research Abstract

A new fuel injection system was developed at first based on a common rail injection system in this research. Prior to this development, numerical simulation code was made in order to estimate the effects of main elementary parts within this injector and the estimation of the additional pressure booster unit. As a result, the control space volume which is formed at the top of the needle rod and the inlet/outlet orifice diameter which are located in the control volume play important parts, whereas the common rail volume or the length of high pressure tube between the common rail and the injector have no great influence on injection pressure and injection shape.
By the construction of pressure booster, maximum fuel injection pressure has reached 175 MPa. And as to injection rate control, pilot injection, split injection and multiple divided injection were realized by means of the system control program. This system was attached to a rapid compression machine, and single shot combustion tests were performed. This experiment clarified that the ignition delay period is shortened along with the increase of injection pressure in the examined pressure range, and also earlier injection fuel in multiple divided injection made a higher combustion pressure rise rate.
After this experiment, this combustion test apparatus was applied to estimate the heat loss phenomena-in diesel combustion. The heat loss to the combustion chamber wall was apparently affected by orifice diameter and hole number of the injector.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 木村修二,松井幸雄 他2: "小形直噴ディーゼル機関の新燃焼コンセプト"自動車技術会論文集. 30・2. 23-28 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Kosaka,V.H.Drewes,L.Catalfamo 他3名: "Two-Dimensional Imaging of Formaldehyde Formed During the Ignition Process of a Diesel Fuel Spray"SAE Technical Paper Series. 2000-01-0236. 1-13 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kimura, S., Matsui, Y.et al: "A New Concept of Combustion Technolohgy in Small DI Diesel Engines (4th Report)"JSAE Transaction. vol. 30, No. 2. 23-28 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kosaka, H., V.H.Drewes et al: "Two-Dimensional Imaging of Formaldehyde Formed During the Ignition Process of a Diesel Fuel Spray"SAE Technical Paper Series. No. 2000-01-0236. 1-13 (2000)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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