한국추진공학회지 (Journal of the Korean Society of Propulsion Engineers)

  • 제19권2호
  • /
  • Pages.81-87
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  • 2015
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  • 1226-6027(pISSN)
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  • 2288-4548(eISSN)
한국추진공학회 (The Korean Society of Propulsion Engineers)
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디젤 엔진의 연비 향상을 위한 저압 배기재순환 시스템의 적용에 관한 연구

Improvement of Fuel Economy in a Diesel Engine by Application of Low Pressure EGR System

  • Kim, Yongrae (Department of Engine Research, Korea Institute of Machinery and Materials) ;
  • Lee, Yonggyu (Department of Engine Research, Korea Institute of Machinery and Materials)
  • 투고 : 2014.12.30
  • 심사 : 2015.03.11
  • 발행 : 2015.04.01
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초록

디젤 엔진에서 저압 배기재순환 시스템의 적용을 통한 질소산화물 저감과 연비 향상에 관한 효과를 확인하였다. 엔진의 정상 상태 및 과도 상태에서 시험이 진행되었으며, 차량상사를 통한 NEDC 모드 테스트를 위하여 별도의 제어로직도 개발되었다. 정상 상태의 시험결과에서 저압 배기재순환 시스템은 고압 배기재순환 시스템에 비하여 질소산화물 저감 및 연비 향상에 유리함을 확인하였고, NEDC 모드 테스트 결과로부터 배출가스의 증가없이 연비를 향상시킬 수 있는 것으로 나타났다.

LP(low pressure)-EGR system was investigated to evaluate its potential on fuel economy improvement and NOx emission reduction in a diesel engine. A diesel engine was tested for the evaluation of LP-EGR system at both of steady-state and transient test. For a transient test, control logic for LP-EGR valve operation was developed and a NEDC mode test was conducted by using a vehicle status simulation test. The steady-state results showed that LP-EGR system can reduce more NOx emission or fuel consumption comparing to the conventional HP(high pressure)-EGR. From the NEDC mode test, this LP-EGR system showed a possibility to improve fuel economy without a penalty of emissions.

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참고문헌

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