• Title/Summary/Keyword: Diesel particulate matter

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Development of diesel particulate filter for diesel locomotives (디젤기관차용 입자상물질 배출 저감필터 연구)

  • Cho, Young-Min;Kwon, Soon-Bark;Park, Duck-Shin;Jung, Woo-Sung;Lim, In-Gwon;Park, Eun-Young;Kim, Se-Young
    • Proceedings of the KSR Conference
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    • 2007.11a
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    • pp.994-999
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    • 2007
  • The particulate matters emitted by diesel locomotives cause serious air pollution in stations and railroad. There have been various attempt to reduce the air pollution from diesel bus or trucks. However, the air pollution from the diesel locomotives has been out of control because there has not any adaptable technology. In this study, a diesel particulate filter was developed and applied to the diesel locomotives. A 3,000 horsepower large-scale locomotive and a 1,500 horsepower middle-scale locomotive were used for the test of the filter. The particulate matter emissions before and after the treatment was monitored by a scanning mobility particle sizer and a dust monitor. As a result, it was observed that the particulate matters could be successfully removed from the emission gases by using the filter.

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Experimental Study on Estimation of Oxidation Rate of PM inside of Diesel Particulate Filter (DPF내 포집된 입자상 물질의 산화율 산출을 위한 실험적 연구)

  • Shim, Beomjoo;Park, Kyoungsuk;Jo, Kyuhee;Lee, Hyeongjun;Min, Byeongdu
    • Transactions of the Korean Society of Automotive Engineers
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    • v.21 no.2
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    • pp.98-103
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    • 2013
  • Conventional method to estimate mass of particulate matter accumulated in diesel particulate filter is to use pressure difference between upstream and downstream of the filter. Then measured pressure difference should be compared that of clean condition which is no particulate matter accumulated in DPF. During regeneration soot oxidation is also estimated by same method. This methodology, however, has demerit on accuracy because of pressure difference deviation of clean DPFs and pressure difference caused by non-carbon based PM which is different from that of caused by carbon based PM. This study suggests new methodology to estimate accumulated soot oxidation rate through exhaust gas characteristics during regeneration. Results, more high accuracy of soot oxidation was obtained by analysis of relationship between fuel mass and concentration of carbon dioxide and oxygen.

EFFECTS OF TRACE METALS ON PARTICULATE MATTER FORMATION IN A DIESEL ENGINE: METAL CONTENTS FROM FERROCENE AND LUBE OIL

  • Lee, D.G.;Miller, A.;Park, K.H.;Zachariah, M.R.
    • International Journal of Automotive Technology
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    • v.7 no.6
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    • pp.667-673
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    • 2006
  • Diesel particulate matter(DPM) often contains small amounts of metal as a minor component but this metal may contribute to adverse health effects. Knowledge of the mechanism for particle formation as well as the size preference of the trace metals is critical to understanding the potential for health concerns. To achieve this, the size and the composition of each particle should be optimally measured at the same time. Single particle mass spectrometer(SPMS) would be the best tool for this objective. In this paper, we therefore will introduce new findings about the mechanism and distribution of the trace metals in DPM, derived from a study where an SPMS was used to analyze freshly emitted DPM.

An Experimental Study on Exhaust Gas Reduction of Diesel Oxidation Catalyst by CVS-75 Mode in Light Duty Diesel Engine (小型디젤機關에서 CVS-75 모드에 따른 디젤 酸化觸媒裝置의 排出가스 低減에 關한 實驗的 硏究)

  • 한영출;김종춘;오용석
    • Journal of Korean Society for Atmospheric Environment
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    • v.15 no.4
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    • pp.457-461
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    • 1999
  • Recently, increasing usage of diesel vehicle, many countries try to reduce the pollutant materials by emission regulation standard. Particularly, in our country, the supplement ratio of diesel vehicle is high, and air pollution by particulate matter(PM) is very serious. So, in theoretical study wer analyzed the formation principle of gaseous emission and PM, the characteristics of CVS-75 mode. In experimental study, we tested exhaust gas reduction of emission and PM, the characteristics of CVS-75 mode. In experimental study, we tested exhaust gas reduction of disel oxidation catalyst(DOC) by CVS-75 mode in light duty diesel vehicle. In case of an automobiletest with the 2,956cc diesel engine which DOC was equipped, CVS-75 mode which is similar to driving conditions on the road was chosen as the restrictive mode of light duty diesel automobile in our country. According to the Pt, the reduction rate of exhaust emission was estimated with using 0.1% high sulfur fuel and 0.05% low sulfur fuel.

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A Study on Emission Reduction by Diesel Oxidation Catalyst in Diesel Engine (CI기관에서 디젤산화촉매장치에 의한 배출가스 저감에 관한 연구)

  • 김경배;한영출;강호인
    • Transactions of the Korean Society of Automotive Engineers
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    • v.4 no.4
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    • pp.164-170
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    • 1996
  • Among after treatment devices which reduce exhaust gas of diesel engine, diesel oxidation catalyst(DOC) with high reduction efficiency for gaseous matter and particulate matter is now being studied actively. In this study, an experiment was conducted to analyze the effects on factors of oxidaton characteristics and conversion efficiency of DOC. We tested to estimate change of engine performance whether a 11,000cc diesel engine equipps with DOC or not. We conducted test to estimate the reduction efficiency of exhaust gas in P-5 mode, in D-13 mode of heavy duty diesel regulation mode and in somoke opacity mode for two samples and also we conducted test to analyze the effects about both exhaust gas velocities 1,100rpm and 2,200rpm

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A Study on Characteristics of Electric Heater Regeneration Filter Trap in Diesel Engine (디젤기관에서 전기 히터 재생 여과 트랩의 특성에 관한 연구)

  • 류규현;박만재
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.10 no.1
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    • pp.10-15
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    • 2001
  • Urgent increasing of the vehicles influence air pollution and the damage of the plants and animals. Particularly, exhaust-ing particulate of diesel vehicles give serious effect to human life. Therefore, this study aim to reduce amount of particulate and to contribute developing after-treatment in diesel engine. Through the experimental and theoretical study about charac-teristics of the electric heat regeneration, various results are obtained.

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Combustion and Nano-particulate Emissions Characteristics of a Compression Ignition Engine Fueled with Oxygenated Blending Fuel (압축착화 엔진에서 함산소 혼합연료의 연소 및 미세입자 배출물 특성)

  • Cha, June-Pyo;Yoon, Seung-Hyun;Chon, Moo-Soo;Lee, Chang-Sik
    • Transactions of the Korean Society of Automotive Engineers
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    • v.17 no.5
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    • pp.61-66
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    • 2009
  • An experimental investigation was conducted to analyze the effects of biodiesel-ethanol and biodiesel-diesel blended fuels on the characteristics of combustion and exhaust emissions, and size distributions of particulate matter in a single cylinder diesel engine. The three types of test fuel were biodiesel and two blended fuels which were added ethanol and diesel by 20 % volume based fraction into biodiesel, respectively. In this study, the injection rate, combustion pressure, exhaust emissions and size distributions of particulate matter were measured under various injection timings and injection pressures. The experimental results show that biodiesel-ethanol blended fuel has lengthened ignition delay and low combustion pressure in comparison with those of biodiesel and biodiesel-diesel blended fuel even if all fuels indicated similar trends of injection rate under equal injection pressures. In addition, the ethanol blended fuel significantly reduced nitrogen oxidies (NOx) and soot emissions. And then the size distribution of particulate matters shows that blended fuels restrain the formation of particles which were beyond the range of 150nm comparison with biodiesel fuel.

OXIDATION CHARACTERISTICS OF PARTICULATE MATTER ON DIESEL WARM-UP CATALYTIC CONVERTER

  • Choi, B.C.;Yoon, Y.B.;Kang, H.Y.;Lim, M.T.
    • International Journal of Automotive Technology
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    • v.7 no.5
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    • pp.527-534
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    • 2006
  • Modern passenger cars with diesel engines are equipped with DOC(diesel oxidation catalyst) for the purpose of reducing HC and CO in the exhaust stream. Cold start exhaust emissions pose troubles here as on gasoline engine vehicles. As a result, some of the diesel passenger cars roll off todays the assembly lines with WCC(warm-up catalytic converter). Oxidation characteristics of the particulates in WCC is analyzed in this study by EEPS(engine exhaust particulate size spectrometer). The maximum number of PM is found to come out of WCC in sizes near 10nm when an HSDI diesel engine is operated under the conditions of high speed and medium to heavy load. When the temperature of the WCC exceeds $300^{\circ}C$, the number of PM smaller than 30 nm in diameter sharply increases upon passing through the WCC. Total mass of emitted PM gets reduced downstream of the WCC under low speed and light load conditions due to adsorption of PM onto the catalyst. Under conditions of high speed and medium to heavy load, the relatively large PM shrink or break into fine particles during oxidation process within the WCC, which results in more mass fraction of fine particles downstream of the WCC.

An Investigation of Performance Change of Diesel Oxidation Catalyst for Diesel Vehicle (경유차 적용 디젤산화촉매장치의 성능 변화 분석)

  • Hwang, Jin-Woo;Lee, Chang-Sik
    • Journal of ILASS-Korea
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    • v.14 no.1
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    • pp.15-19
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    • 2009
  • This paper is to investigated the analysis of performance characteristics of diesel oxidation catalyst (DOC) for diesel vehicle with 2.5L piston displacement. The performance evaluation test of DOC applied to test diesel vehicle was carried out for four kinds of DOCs manufactured from different company. The testing DOCs were randomly selected from the retrofit vehicle and then standard test vehicle that was representative for the application group was equipped with DOC for the test. In this verification test, the reduction rate of particulate matter (P.M.) and the deviation of the performance of the DOC were examined through CVS-75 mode of the standard vehicle and SOF reduction rate of specific DOC was investigated. It was found that some DOCs failed to pass the criteria of the P.M. reduction rate because of the reason seen catalyst aging even if they were same devices. In the result of SOF analysis, the specific DOC showed more PM reduction than SOF of PM. reduction exceptionally.

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An Experimental Study on the Smoke Filtration System Using Water Injection and Vacuum Pump driven by Exhaust Gas (물 분사 및 배기가스 구동형 진공펌프를 이용한 매연여과장치에 대한 실험적 연구)

  • Lee, Han-Sung;Kim, Kyong-Hyon;Jung, Suk-Ho;Koh, Dae-Kwon
    • Journal of Power System Engineering
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    • v.17 no.3
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    • pp.17-22
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    • 2013
  • Diesel particulate filter has been adopted in new vehicle with diesel engine. Since the flow of exhaust gas was clogged as particulate matters were deposited in the filter, it have bad effects on a fuel consumption and power. It was investigated that a particulate filtering system with vacuum pump in the exhaust gas line could be free from clogging in previous research. In this study, the effects of water injection and position of inlet port in filtering system on reducing in particulate matter were investigated. It was noticed that particulate matter were decreased remarkable by water injection and moving the position of inlet port.