Effect of a 2-stage injection strategy on the combustion and flame characteristics in a PCCI engine

Y. J. Kim, K. B. Kim, K. H. Lee

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Recently, to reduce environmental pollution and the waste of limited energy resources, there is an increasing requirement for higher engine efficiency and lower levels of harmful emissions. A premixed charge compression ignition (PCCI) engine, which uses a 2-stage type injection, has drawn attention because this combustion system can simultaneously reduce the amount of NOx and PM exhausted from diesel engines. It is well known that the fuel injection timing and the spray angle in a PCCI engine affect the mixture formation and the combustion. To acquire two optimal injection timings, the combustion and emission characteristics of the PCCI engine were analyzed with various injection conditions. The flame visualization was performed to validate the result obtained from the engine test. This study reveals that the optimum injection timings are BTDC 60° for the first injection and ATDC 5° for the second injection. In addition, the injection ratio of 3 to 7 showed the best NOx and PM emission results.

Original languageEnglish
Pages (from-to)639-644
Number of pages6
JournalInternational Journal of Automotive Technology
Volume12
Issue number5
DOIs
Publication statusPublished - Oct 1 2011

Keywords

  • Emissions
  • Flame visualization
  • NOx
  • PM
  • Premixed charge compression ignition (PCCI)

ASJC Scopus subject areas

  • Automotive Engineering

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