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2002 Fiscal Year Final Research Report Summary

Ignition Control of Mixtures in Internal Combustion Engines

Research Project

Project/Area Number 13650219
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

OHTA Yasuhiko  Nagoya Institute of Technology, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (90024273)

Co-Investigator(Kenkyū-buntansha) FURATANI Masahiro  Nagoya Institute of Technology, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (50242904)
Project Period (FY) 2001 – 2002
KeywordsIgnition / Internal Combustion Engine / Ignition Cntrol / Formaldehyde / Reciprocating-Piston Engine / Low-Temperature Flames / New Combustion Method / Natural Gas
Research Abstract

Methane would not generate cool flame during its preflame period in the autoignition processes ; quite different from the higher hydrocarbon fuels including propane, butane, gasoline and diesel oils.
・ n-Butane content has more ignition promoting effect compared to ethane and propane for the methane-dominant fuel gases.
・ No weighted summing rule of octane/cetane rating is approved, as suited for normal liquid hydrocarbon fuels.
Measures should be found out to eliminate the fluctuation of ignition. The most important intermediate during the preflame period up to the hot-flame establishment of hydrocarbon fuels is the formaldehyde, which is closely related to the cool-flame a ppearance. We proposed herewith an ignition-control concept utilizing the gaseous formaldehyde as an additive to maintain stabilized operation of spark-ignited natural gas engines and to realize premixed compression-ignition engines (i.e.homogeneous charge compression ignition engine, HCCI). Lean fuel/air mixtures wit … More h various fuel/fuel ratios between methane and n-butane were supplied to apremixed compression-ignition engine with or without supplementary gaseous formaldehyde induction as an ignition controlling additive. The amount of formaldehyde was hundreds parts per million of total mixtures. The formaldehyde addition to the methane/butane/air mixtures has given the engine desired and stable ignition timings controllable by the amount of formaldehyde to be added, almost independent on the fuel/fuel ratios between methane and butane.
A small amount of formaldehyde added into the methane/ butane/air mixtures has given the engine desired and stable ignition timings according to the amount of formaldehyde added, almost independent on the fuel/fuel ratios between methane and butane.
・ The amount of formaldehyde added to the fuel/air mixture becomes a sole controlling factor to the ignition tuning. The effect of formaldehyde addition is inhibitory for the mixtures with advanced hot-flame ignition timings as contrasted with a promoting effect to the mixtures wilh retarded ignition timings.
・Troubles due to the day-by-day ignition-characteristic fluctuation of the engine fuel gases can be eliminated by using a small amount of formaldehyde for the premixed compression-ignition and spark-ignited natural gas engines.
・Operating range of premixed compression-ignition engine expands to both methane-abundant and butane-abundant directions.
Formaldehyde is efficacious as an ignition controlling medium for the hydroribon/air mixtures in engine cylinders. The effect of formaldehyde leading to the ignition would be an inhibitory event for the cool-flame generating constituent and a promoting event of the preflame reaction of the non-cool-flame generating constituent in the fuel gases. Less

  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] T.Isogai, M.Furutani, Y.Ohta: "Ignition Characteristics Fluctuation of Fuel Gas and its Elimination for Natural Gas Engines"Third Dessau Gas Engine Conference. 3. S1-2 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Furutani, T.Isogai, Y.Ohta: "Ignition Characteristics of Gaseous Fuels and Their Difference Elimination for SI and HCCI Gas Engines"SAE Paper 2003-01-1857/JSAE Paper 20030282. 1-6 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 磯貝, 野勢, 古谷, 太田: "バーナ低温度炎に対するホルムアルデヒド添加の効果"第40回燃焼シンポジウム. 40. 325-326 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山谷, 古谷, 太田: "ホルムアルデヒドによる天然ガス予混合圧縮自着火機関の着火時期安定化"第17回内燃機関シンポジウム. 17. 20026016 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Yamaya, M.Furutani, Y.Ohta: "Formaldehyde for the Premixed Compression-Ignition Engine-An Additive for Ignition-Timing Control-"Journal of KONES, Internal Combustion Engines. 9-1/2. 291-297 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Furutani, Y.Ohta, M.Nose: "A Key to Achieve Ignition-Carbon Monoxide Generation/Consumption in Blue-Flame Period during Hydrocarbon Compression Ignition"Journal of KONES, Internal Combustion Engines. 8-1/2. 1-8 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Isogai, M.Furutani and Y.Ohta: "Invited Paper. "Ignition Characteristics Fluctuation of Fuel Gas and its Elimination far Natural Gas Engines""Third Dessau Gas Engine Conference. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Furutani, T.Isogai and Y.Ohta: "Ignition Characteristics of Gaseous Fuels and Their Difference Elimination for SI and HCCI Gas Engines"SAE Paper. 2003-01-1857

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Yamaya, M.Furutani and Y.Ohta: "Formaldehyde for the Premixed Compression-Ignition Engine - An Additive for Ignition-Timing Control -"Journal of KONES, Internal Combustion Engines. 9-1/2. 291-297 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Furutani, Y.Ohta and M.Nose: "A Key to Achieve Ignition - Carbon Monoxide Generation /Consumption in Blue-Flame Period during Hydrocarbon Compression Ignition"Journal of KONES, Internal Combustion Engines. 8-1/2. 1-8 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Ohta: "Nitric Oxide Circumstances in Nitrogen-Oxide Seeded Low-Temperature Powling-Burner Flames"(2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Ohta: "Low-Temperature Flames caused by Piston Compression and New Concept of Compression Ignition Engine"(2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Ohta: "Int'l Conference "Progress in Fluid Dynamics and Reactive Flows"(2001)

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

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Published: 2004-04-14  

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