A study of autoignition and combustion in two-stroke ATAC engine - Compression ignition characteristics of low carbon alternative fuels

Norimasa Iida

研究成果: Conference contribution

6 被引用数 (Scopus)

抄録

ATAC (Active Thermo-Atmosphere Combustion) is autoignition combustion in two stroke engines, which occurs by diluting trapped Fuel-Air mixture with residual gas to maintain a high temperature at low load operation. In this study, two-stroke ATAC engine testing was carried out to obtain fundamental knowledge for controlling the autoignition and combustion characteristics in this premixed charge compression-ignition combustion engine. The influences of delivery ratio, equivalence ratio and enginespeed (i.e. compression speed) on autoignition timing, autoignition temperature and combustion duration were investigated. It was found that the ATAC autoignition temperature and combustion duration did not depend on the delivery ratio and equivalence ratio, but were determined by the individual fuel characteristics. Increasing the compression speed reduced the ATAC autoignition temperature a little. ATAC autoignition occured at the crank angle when the mass-averaged temperature of the mixture of residual gas and trapped Fuel-Air mixture reached a certain temperature, characteristic to the fuel used. In other words, the autoignition timing depended on the mass-averaged temperature at port closing timing. But at certain delivery ratios, autoignition did not occur, even though the temperature at this timing was in the autoignition region. This point must be investigated further.

本文言語English
ホスト出版物のタイトルSAE Technical Papers
DOI
出版ステータスPublished - 1999
イベントSmall Engine Technology Conference and Exposition - Madison, WI, United States
継続期間: 1999 9 281999 9 30

Other

OtherSmall Engine Technology Conference and Exposition
国/地域United States
CityMadison, WI
Period99/9/2899/9/30

ASJC Scopus subject areas

  • 自動車工学
  • 安全性、リスク、信頼性、品質管理
  • 汚染
  • 産業および生産工学

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