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승용 디젤 엔진에서의 배기재순환률 변경에 따른 나노입자 배출특성 연구
고아현(Ahyun Ko),황인구(In Goo Hwang),명차리(Cha-Lee Myung),박심수(Simsoo Park) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
This paper was focused on the Particulate Matter (PM) emission characteristics through change of Exhaust Gas Recirculation (EGR) rate of light-duty diesel engine. The DMS500 (Differential Mobility Spectrometer) was used as a particle measurement apparatus that indicates particle number concentration of 5~1000 ㎚. The EGR rate was sampled on the downstream of turbocharger to exclude the effect of an exhaust gas after-treatment system (DOC & DPF). And the EGR rate was varied from low speed and torque to high speed and torque. As general experimental results, particle emissions increase due to the influence of EGR, however, particle size distribution is slightly different trends through engine operating conditions.
승용 디젤엔진의 운전 조건과 후처리 시스템이 디젤 입자상 물질 배출에 미치는 영향에 관한 연구
고아현(Ahyun Ko),황인구(In Goo Hwang),명차리(Cha-Lee Myung),최회명(Hoimyung Choi),박심수(Simsoo Park) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
This study was mainly focused on the exhausted particle emission characteristics from diesel engine. Particulate matter (PM) was measured with different four sampling point on the upstream and downstream of DOC (Diesel Oxidation Catalyst) and DPF (Diesel Particulate Filter). Moreover EGR rate and injection timing were varied for part load condition. In this paper, particle size and concentration were investigated with DMS500 (Differential Mobility Spectrometer).
승용 디젤 엔진의 후처리 시스템 적용에 따른 나노입자 배출 맵 구축 및 저감특성에 관한 연구
고아현(Ahyun Ko),황인구(In Goo Hwang),명차리(Cha-Lee Myung),박심수(Simsoo Park),최회명(Hoimyung Choi) 대한기계학회 2010 大韓機械學會論文集B Vol.34 No.8
본 연구는 승용 디젤엔진의 입자상 물질 배출특성에 관한 것으로써, 엔진에서 배출된 입자상 물질이 배기관 및 후처리장치인 디젤산화촉매와 매연여과장치를 통과할 때의 특성 변화를 파악하기 위하여 후처리장치 각각 전 후단 및 배기관에서 직접 측정하였다. 또한 다양한 엔진회전속도 및 부하조건에서 측정함으로써 입자상 물질 배출 맵을 구축하였으며, 디젤산화촉매 및 매연여과장치의 입자상 물질 저감효과에 대해 평가하였다. 뿐만 아니라 배기재순환율과 연료분사시기를 변경시켜 입자상 물질의 배출특성 변화를 파악하였다. 모든 시험에서 입자상 물질을 5~1000nm 크기까지 측정할 수 있는 DMS500을 이용하였다. In this study, we mainly focused on the PM (Particulate Matter) emission characteristics of a diesel engine. To analyze particle behavior in the tail-pipe, particle emission was measured on the engine-out (downstream of turbocharger), each upstream and downstream both of DOC (Diesel Oxidation Catalyst) and DPF (Diesel Particulate Filter). Moreover, particle emission contours on each sampling point were constructed. The reduction efficiency of particle number concentration and mass through the DOC and DPF was studied. Parameters such as EGR (Exhaust Gas Recirculation) and the main injection timing were varied in part load conditions and evaluated using the engine-out emissions. The DMS500 (Differential Mobility Spectrometer) was used as a particle measurement instrument that can measure particle concentrations from 5 nm to 1000 nm. Nano-particles of sizes less than 30 nm were reduced by oxidation or coagulated with solid particles in the tail-pipe and DOC. The DPF has a very high filtration efficiency over all operating conditions except during natural regeneration of DPF.
가솔린과 바이오 에탄올 혼합 연료의 엔진 및 차량 모드 주행시의 입자상 물질 배출 특성
고아현(Ahyun Ko),이형민(Hyungmin Lee),최관희(Kwanhee Choi),박심수(Simsoo Park),이영재(Young Jae Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
This paper was focused on the particulate matter (PM) on the gasoline and bio ethanol. Bio ethanol as a clean fuel is considered one of the alternative fuels that decreased the PM emission from the vehicle. Particle formation in SI engine was depended on the fuel and engine operating condition. In this paper, Particle number concentration behaviors were analyzed by DMS500 (Differential Mobility Spectrometer) and CPC (Condensation Particle Counter) instrument which was recommended by PMP (Particle Measurement Programme). Particle emissions were measured with various engine operating variables such as air excess ratio (λ), spark timing and intake valve opening (IVO) at part load condition. In vehicle test, the number of particulate matter was analyzed with golden particle measurement system, which was consist of CVS (Constant Volume Sampler), particle number counter and particle number diluter.
고속 PM 분석기를 이용한 디젤엔진 후처리 시스템 내의 입자상 물질 배출 거동에 관한 연구
고아현(Ahyun Ko),이형민(Hyungmin Lee),홍길화(Kilhwa Hong),민경덕(Kyoungdoug Min),박심수(Simsoo Park) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
This paper was focused on the particulate matter (PM) behaviors from DI diesel engine and vehicle. PM from diesel engine is considered one of the sources on the air pollution and respiratory diseases. In this paper, particle behaviors were analyzed by DMS500 (Differential Mobility Spectrometer). PM was measured with commonly used operating conditions and different three sampling point on the upstream and downstream of DOC (Diesel Oxidation Catalyst) and DPF (Diesel Particulate Filter). In the vehicle test, NEDC mode (New European Driving Cycle) was applied and PM was directly measured on the tail-pipe. DOC decreases the nano-particle number, however particle mass keep the nearly same level. DPF has high filtration efficiency.