Air-fuel mixing and combustion in a small-bore direct injection optically accessible diesel engine using a retarded single injection strategy

Tiegang Fang, Robert E. Coverdill, Chia fon F. Lee, Robert A. White

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, the air-fuel mixing and combustion in a small-bore direct injection optical diesel engine were studied for a retarded single injection strategy. The effects of injection pressure and timing were analyzed based on in-cylinder heat release analysis, liquid fuel and vapor fuel imaging by Laser induced exciplex fluorescence technique, and combustion process visualization. NOx emissions were measured in the exhaust pipe. Results show that increasing injection pressure benefits soot reduction while increases NOx emissions. Retarding injection timing leads to simultaneous reduction of soot and NOx emissions with premixed homogeneous charge compression ignition (HCCI) like combustion modes. The vapor distribution in the cylinder is relatively homogeneous, which confirms the observation of premixed combustion in the current studies. The postulated path of these combustion modes were analyzed and discussed on the equivalence ratio-temperature map.

Original languageEnglish (US)
Pages (from-to)2074-2082
Number of pages9
JournalFuel
Volume88
Issue number11
DOIs
StatePublished - Nov 1 2009

Keywords

  • High-speed direct injection (HSDI) diesel engine
  • Homogeneous charge compression ignition (HCCI) combustion
  • Laser induced exciplex fluorescence (LIEF) technique
  • Natural flame luminosity

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

Fingerprint Dive into the research topics of 'Air-fuel mixing and combustion in a small-bore direct injection optically accessible diesel engine using a retarded single injection strategy'. Together they form a unique fingerprint.

Cite this