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

Norimasa Iida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationSAE Technical Papers
DOIs
Publication statusPublished - 1999
EventSmall Engine Technology Conference and Exposition - Madison, WI, United States
Duration: 1999 Sep 281999 Sep 30

Other

OtherSmall Engine Technology Conference and Exposition
CountryUnited States
CityMadison, WI
Period99/9/2899/9/30

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'A study of autoignition and combustion in two-stroke ATAC engine - Compression ignition characteristics of low carbon alternative fuels'. Together they form a unique fingerprint.

  • Cite this