Experimental analysis of thermal efficiency improvement

Masahiro Ishida, Sukho Jung, Hironobu Ueki, Daisaku Sakaguchi

Research output: Contribution to conferencePaperpeer-review

2 Citations (Scopus)

Abstract

The effect of exhaust gas recirculation (EGR) on combustion characteristics and thermal efficiency has been investigated in homogeneous charge compression ignition (HCCI) engines using diesel engines with single- and multi-cylinder having compression ratios of 17.8 and 18.2 respectively. These HCCI engines were operated by natural gas premixed with a small amount of dimethyl ether (DME) as an ignition source. In the present study, the effect of EGR was focused on improvement in the brake thermal efficiency. It is noticed that the brake thermal efficiency higher than 4% was achieved by the high EGR ratio of 0.5 compared with the case without EGR, and almost equal improvements due to EGR are obtained in both single- and multi-cylinder engines. It is found that an increase in brake thermal efficiency due to EGR is based on the improvement in combustion efficiency mainly resulting from a significant reduction in the unburned hydrocarbon emission.

Original languageEnglish
Pages289-296
Number of pages8
Publication statusPublished - 2008
Externally publishedYes
Event7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008 - Sapporo, Japan
Duration: Jul 28 2008Jul 31 2008

Other

Other7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008
Country/TerritoryJapan
CitySapporo
Period7/28/087/31/08

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Control and Systems Engineering
  • Modelling and Simulation

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