Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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NOx Emission Characteristic according to Aging of EGR Cooler in Non-Road Diesel Engine

EGR 적용 비도로 엔진의 쿨러 열화에 따른 질소산화물 배출특성

  • Lee, Kyoung-Bok (Advanced Engine System R&D center, Korea Automotive Technology Institute) ;
  • Oh, Kwang-Chul (Advanced Engine System R&D center, Korea Automotive Technology Institute)
  • 이경복 (자동차부품연구원 차세대엔진시스템연구센터) ;
  • 오광철 (자동차부품연구원 차세대엔진시스템연구센터)
  • Received : 2016.06.15
  • Accepted : 2016.08.17
  • Published : 2016.10.31
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Abstract

Exhaust gas recirculation has the advantage of being low-cost and easy to control of NOx emission. Therefore, it is most generally used to reduce NOx emission according to strengthen regulation. In the case of a non-road engine, such as the agricultural engine, since it mainly operate a middle or high-load state, NOx emission is decreased in accordance with the mapping range of the EGR rate, but results in an increase in the particulate matter which is caused to deposit and fouling problem of the EGR system. This problem has become an important issue for maintaining the performance of the engine, as well as emission performance. This study had examined the effects of cooler aging on the performance of heat transfer efficiency and NOx emission in non-road diesel engine. As a result of the EGR cooler aging during 200 hours engine operation, the cooling performance decreased about 25% compared with that of fresh cooler and the NOx emission increased about 14.6% on NRSC(non-road steady cycle) and 20% on NRTC(non-road transient cycle) compared with that of fresh cooler respectively.

Keywords

References

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