Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Establishing HP/LP-EGR System and Founding Operating Strategy of Low Temperature Combustion Engine to Improve Fuel Consumption

연료소비율 개선을 위한 고압/저압 배기재순환 시스템 구축 및 저온연소 엔진의 운전전략 수립

  • Shin, Seunghyup (Advanced Engine System Development Team, Doosan Infracore) ;
  • Han, Youngdeok (Advanced Engine System Development Team, Doosan Infracore) ;
  • Shim, Euijoon (Advanced Engine System Development Team, Doosan Infracore) ;
  • Kim, Duksang (Advanced Engine System Development Team, Doosan Infracore)
  • 신승협 (두산인프라코어 엔진선행개발팀) ;
  • 한영덕 (두산인프라코어 엔진선행개발팀) ;
  • 심의준 (두산인프라코어 엔진선행개발팀) ;
  • 김득상 (두산인프라코어 엔진선행개발팀)
  • Received : 2013.10.31
  • Accepted : 2014.01.27
  • Published : 2014.04.01
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Abstract

This study researched on the effect of HP/LP-EGR system to improve fuel consumption of Low Temperature Combustion Engine. Firstly, low temperature combustion engine with HP/LP-EGR system was established using 6.0L wastegate turbocharger HDDI engine. And suppliable EGR rate of the engine was proven to be enough to realize stable low temperature combustion. Then, optimum operating strategy was founded to develop fuel consumption of the engine. Control parameters were HP/LP-EGR valve and IPCV(Intake Pressure Control Valve) duty. Experiments method was that characteristics of the engine were measured and analyzed according to HP/LP-EGR strategies while EGR rate was fixed. Operating range for the strategy were divided into three parts, low load for low temperature combustion, high load for conventional diesel combustion, and transient condition. Finally, with the above strategy of this study, BSFC of the engine was improved about 2% compared to the base engine, and emission level, NOx and PM, met Tier4Final emission regulation.

Keywords

References

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  1. Development of Low Temperature Diesel Combustion Engine for Construction Equipments vol.22, pp.6, 2014, https://doi.org/10.7467/KSAE.2014.22.6.083