Due to the global warming problem, diesel engine is becoming an one of the most promising solutions for vehicles in the world. Compared to spark-ignition engines, diesel engines generally have lower unburned hydrocarbon and carbon monoxide, but they also produce still higher levels of NOx and smoke emissions even though using a common-rail injection system. To reduce the diesel emissions, DOC and DPF system have been developed to comply with tighten diesel emission regulations. This paper describes the NOx and smoke emission characteristics of current diesel vehicle with a post injection and plasma after-treatment system. Emissions tests were performed according to New European Driving Cycle mode. Results from these tests show that NOx and smoke emissions with Urea post injection and plasma treatment system is 72% lower than that without the system in the NEDC mode.

Abstract
 1. 서론
 2. 실험장치 및 방법
  2.1 실험 장치
  2.2 실험방법
 3. 결과 및 고찰
  3.1 시험차량 및 시험조건
  3.2 Diesel post injection 시험 결과
  3.3 LPG post injection 시험 결과
  3.4 Urea post injection 시험 결과
 4. 결론
 후기
 참고문헌

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