An Analysis of Autoignition and Combustion Characteristics in a Supercharged HCCI Engine Using Gaseous Blended Fuels

ガス混合燃料を用いた過給HCCI 機関の自着火及び燃焼特性の解析

Homogeneous Charge Compression Ignition (HCCI) combustion and effective use of gaseous fuels have attracted much interest as means of obtaining cleaner exhaust gas with a lower carbon content from internal combustion engines. In this study, the effects of the fuel type on ignition, combustion and engine performance characteristics were investigated experimentally and by chemical kinetic simulations using blended fuels of dimethyl ether (DME) and methane or DME and propane. The results showed that the blended fuel of DME and methane produced two-stage primary combustion, depending on the operating conditions, which had the effect of moderating combustion. With the blended fuel of DME and propane, ignition was delayed, making it possible to moderate the rapidity of primary combustion. It was also observed that propane had a larger effect than methane on suppressing the low-temperature oxidation reactions of DME.HCCI燃焼においてDME/メタン,DME/プロパンの混合燃料を使用し,燃料の種類が着火・燃焼・機関特性に与える影響を実験と素反応計算により調べた.その結果DME/メタンでは主燃焼が二段階に発生することで,DME/プロパンでは着火が遅角することで,緩慢な燃焼にすることができた.またプロパンはメタンよりDMEの低温酸化反応を抑制する効果が大きいことが分かった.

Language

  • English
  • Japanese

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01666913
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: Jan 31 2018 3:24PM