Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Comparison of the LNT Regeneration Methods in 2.2L Common Rail Direct Injection Diesel Engine

2.2L 직분사 디젤 엔진에서 LNT 촉매 재생을 위한 환원제 분사 방법 비교

  • Nam, Chungwoo (Graduate School of Mechanical Engineering, Keimyung University) ;
  • Han, Manbae (Department of Mechanical and Automotive Engineering, Keimyung University)
  • 남충우 (계명대학교 대학원 기계공학과) ;
  • 한만배 (계명대학교 기계자동차공학과)
  • Received : 2014.06.30
  • Accepted : 2014.11.04
  • Published : 2015.03.01
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Abstract

In this study we investigated the regeneration methods for the lean $NO_x$ trap (LNT) catalyst in a 2.2L direct injection diesel engine. The regeneration methods were 1) in-cylinder post fuel injection and 2) external fuel injection strategy. The in-cylinder post fuel injection method uses in-cylinder injectors with the addition of the post fuel injection to supply enough reductants such as CO, $H_2$, THC. The external fuel injection method was enabled by installing a fuel injector with a wide spray angle before the LNT catalyst. Through the engine experiment, the $NO_x$ conversion efficiency, the amount of reductant exhaust gases, fuel consumption, and temperature behavior in the LNT catalyst were evaluated and compared for the two regeneration methods.

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References

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