• 제목/요약/키워드: Characteristics of exhaust emission

검색결과 580건 처리시간 0.023초

함산소연료(EGBE)와 Cooled EGR이 디젤기관의 성능과 배기배출물에 미치는 영향 (The Effect of Cooled EGR and Oxygenate Fuel(EGBE) on the Diesel Engine Performance and Emissions)

  • 최승훈;오영택
    • 한국자동차공학회논문집
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    • 제11권1호
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    • pp.79-86
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    • 2003
  • In this paper, the effect of oxygen component in fuel on the exhaust emissions has been investigated fur direct injection diesel engine. It was tested to estimate change of engine performance and exhaust emission characteristics for the commercial diesel fuel and oxygenated blended fuel which has seven kinds of mixed ratio. And, the effects of exhaust gas recirculation(EGR) on the characteristics of NOx emission have been investigated. Ethylene glycol mono-n-butyl ether(EGBE) contains oxygen component 27% in itself, and it is a kind of effective oxygenated fuel of mono-ether group that the smoke emission and unburned hydrocarbons of EGBE is reduced remarkably compared with commercial diesel fuel, that is, it can supply oxygen component sufficiently at higher loads and speeds in diesel engine. It was found that simultaneous reduction of smoke and NOx was achieved with oxygenated fuel and cooled EGR method.

GT-Power기반 디젤 배기밸브 제어모델 개발 및 연소 특성 해석 (Analysis of Combustion Characteristics and Diesel Exhaust Valve's Control with GT-Power 1-D Detail Model)

  • 이유민;조인수;김주현;이진욱
    • 한국분무공학회지
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    • 제23권1호
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    • pp.1-8
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    • 2018
  • In this study, the effects of variation in cam phasing and valve lift of exhaust valves by using Cam-in-Cam system on combustion and emission characteristics for diesel engine were investigated under GT-POWER simulation environment. This paper showed analytic result of combustion characteristics and diesel exhaust valve's control with GT-Power 1-D detail model. As a result, it was found that volumetric efficiency and IMEP were decreased as the exhaust valve opening and closing timing is advanced due to its internal EGR effects. Also, it was found that NOx emission were decreased as EVC timing was retarded. These show that the retarding the exhaust valve closing and opening while keeping the duration at constant can be effective for controlling AFR and mixing rate in diffusion combustion of diesel engine.

미강유 적용 소형 디젤엔진의 배기배출물 특성 (Exhaust Emissions Characteristics of a Small Diesel Engine using Rice-bran Oil)

  • 나우정;유병규;정진도
    • Journal of Biosystems Engineering
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    • 제23권2호
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    • pp.125-134
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    • 1998
  • It seems possible, by use of vegetable oils, to solve the pollution problem caused by the exhaust gas from diesel-engine vehicles. Recently vegetable oils has received considerable attention as an alternative and clean energy source to the foreseeable depletion of world oil supplies. The objective of this study is to experimentally investigate the characteristics of exhaust emissions of a small diesel engine using light oil, rice-bran oil, heated rice-bran oil, rice-bran oil treated with ultrasonic energy. SO$_2$ emission from the pure and the treated rice-bran oils was not detected at speeds hgher than 1,800 rpm while that from the light oil was detected at all the speeds at 4/4 load. NOx emission form these vegetable oils was generally higher compared to that from the light oil for most of the test conditions. tendency opposite to that of NOx emission. The data obtained in this experiment may be applicable for the desist of small diesel engine using the alternative fuels.

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디젤기관에서 함산소연료(DMC)와 Cooled EGR방법에 의한 매연과 NOx의 동시저감 (Simultaneous Reduction of Smoke and NOx with Oxygenated Fuel(DMC) and Cooled EGR method in Diesel Engine)

  • 오영택;최승훈
    • 동력기계공학회지
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    • 제6권1호
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    • pp.27-35
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    • 2002
  • In this paper, the effect of oxygen component in fuel on the exhaust emissions has been investigated for direct injection diesel engine. It is tested to estimate change of engine performance and exhaust emission characteristics for the commercial diesel fuel and oxygenate blended fuel which has four kinds of mixed ratio. And, the effects of exhaust gas recirculation(EGR) on the characteristics of NOx emission and brake specific fuel consumption rate have been investigated. Dimethyl carbonate(DMC) contains oxygen component 53.3% in itself, and it is a kind of effective oxygenated fuel of carbonate group that the smoke emission of DMC is reduced remarkably in comparison with commercial diesel fuel, that is, it can supply oxygen component sufficiently at higher loads and speeds in diesel engine. It was found that simultaneous reduction of smoke and NOx was achieved with oxygenated fuel and EGR method.

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디젤기관에서 다종 함산소연료 첨가에 의한 배기배출물 특성에 관한 실험적 연구 (An Experimental Study on Exhaust Emission Characteristics by Various Oxygenated Additives in Diesel Engine)

  • 오영택;최승훈
    • 한국자동차공학회논문집
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    • 제10권3호
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    • pp.101-110
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    • 2002
  • In this paper, the effects of oxygen component in blended fuel on the exhaust emissions have been investigated far direct injection diesel engine. It was tested to estimate change of engine performance and exhaust emission characteristics for th? commercial diesel fuel and oxygenated blended fuels which have three kinds of fuels and various mixed rates. And, it was tried to analyze not only total hydrocarbon but individual hydrocarbons(C$_1$∼ C$\_$6/) in exhaust gases using gas chromatography to seek the reason far remarkable reduction of smoke emission on various oxygenated fuels. This study carried out by comparing the chromatogram with diesel fuel and diesel fuel blended DGM(diethylene glycol dimethyl ether), MTBE(methyl tart-butyl ether) and EGBE(ethylene glycol mono-n-butyl ether). The results of this study show that individual hydrocarbons as well as total hydrocarbon of oxygenated fuel are reduced remarkably compared with commercial diesel fuel.

DI 디젤기관에서 함산소연료(EGBE)와 EGR의 유용성에 관한 실험적 연구 (An Experimental Study on Usability of Oxygenated Fuel(EGBE) and EGR in a DI Diesel Engine)

  • 최승훈;황윤택;김우상;오영택
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2003년도 춘계학술대회
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    • pp.1697-1702
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    • 2003
  • In this paper, the effect of oxygen component in fuel on the exhaust emissions has been investigated for a direct injection diesel engine. It was tested to estimate change of engine performance and exhaust emission characteristics for the commercial diesel fuel and oxygenated blended fuel which has seven kinds of mixed ratio. And, the effects of exhaust gas recirculation(EGR) on the characteristics of NOx emission have been investigated. Ethylene glycol mono-n-butyl ether(EGBE) contains oxygen component 27% in itself, and it is a kind of effective oxygenated fuel of mono-ether group that the smoke emission of EGBE blended fuel is reduced remarkably compared with commercial diesel fuel, that is, it can supply oxygen component sufficiently at higher loads and speeds in a diesel engine. It was found that simultaneous reduction of smoke and NOx was achieved with oxygenated fuel and cooled EGR method.

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자동차 배출가스 측정을 위한 Photoacoustic Spectroscopy Cell의 3차원 유동장 해석 (Three-Dimensional Fluid Flow Analysis of Photoacoustic Spectroscopy Cell for Measurement of Automotive Exhaust Gas)

  • 김현철;박종호
    • 한국자동차공학회논문집
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    • 제11권2호
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    • pp.111-118
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    • 2003
  • Recently, environmental damage to urban area becomes serious problem due to the exhaust emissions by increasing the number of vehicle. Especially, exhaust emission from diesel vehicles are blown to be harmful to human health and environment. Photoacoustic Spectroscopy system is very useful technology for simultaneous and continuous measurement of the various components of the automotive exhaust gas. In this study, in order to reduce emission gases from automobile, we tried to develop the measurement system of Photoacoustic Spectroscopy. To improve performance of high sensitive Photoacoustic Spectroscopy system for automotive exhaust emissions, the shape of Photoacoustic Spectroscopy cell was optimized to use the flow analysis. And Exhaust emission data of the 1,500cc gasoline engine was fixed the working fluid. The characteristics of fluid flow for cell were analyzed by various conditions in detail.

선박용 디젤기관에 있어서 스크러버형 배기재순환 시스템의 배기배출물 특성에 관한 연구 (A Study on Exhaust Gas Emissions Characteristics of EGR with Scrubber for Marine Diesel Engine)

  • 임재근;조상곤
    • Journal of Advanced Marine Engineering and Technology
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    • 제24권2호
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    • pp.57-62
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    • 2000
  • The effect of exhaust gas recirculation(EGR) on the characteristics of exhaust gas emissions, and SFC are experimentally investigated by four-cylinder, four-cycle and direct injection marine diesel engine. In order to reduce the soot contents in the recirculated exhaust gas to intake system of the engines, a soot removal system of a cylinderical-type scrubber is specially designed and manufactured for the experimental system. (1) SFC is increased in downward convex curve style with increasing excess air ratio, it is increased with increasing EGR rate at the same excess air ratio. (2) NOx emission is reduced in downward convex curve style with increasing excess air ratio, it is reduced with increasing EGR rate at the same excess air ratio. (3) Soot emission is decreased in downward convex curve style with increasing excess air ratio, it is reduced with increasing EGR rate at the same excess air ratio. (4) CO emission is increased in nearly straight line style with increasing excess air ratio, it is increased with increasing EGR rate at the same excess air ratio. (5) HC emission is not constant tendency with increasing excess air ratio, it is increased with increasing EGR rate at the same excess air ratio.

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소형 고속 디젤기관의 배기 배출물에 미치는 배기 재순환율의 영향에 관한 실험적 연구 (An Experimental Study on Effects of EGR Rate upon Exhaust Emissions in Small High-Speed Diesel Engines)

  • 임재근;배명환;김종일
    • Journal of Advanced Marine Engineering and Technology
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    • 제16권4호
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    • pp.60-77
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    • 1992
  • The effects of exhaust gas recirculation(EGR) on the characteristics of exhaust emissions and specific fuel consumption have been investigated using an eight-cylinder, four cycle, direct injection diesel engine operating at several loads and speeds. The experiments in this study are conducted on the fixed fuel injection timing of $38^{\circ}$ BTDC regardless of experimental conditions. In conclusion, it is found that $NO_{x}$ emission is markedly reduced with the drop of burnt gas temperature at high speeds and loads especially as the EGR rate increases, while the soot particulate rises with EGR rate and load at a given engine speed, especially high loads. The reduction of exhaust emissions within the Korea heavy duty diesel engine emission standards can be roughly achieved by the optimal EGR rate without degarding the specific fuel consumption, based on the correlations between exhaust emissions.

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자연흡기식 디젤 기관의 연소와 매연 배출 특성에 관한 실험적 연구 (A Study on the Combustion and Smoke Emission Characteristics of the Natural Aspiration Type Diesel Engine)

  • 정우인;박찬국
    • 한국자동차공학회논문집
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    • 제5권4호
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    • pp.70-83
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    • 1997
  • We made a selection of engine operating conditions in the natural aspiration type diesel engine as load and speed. The effects on the power, smoke emission and cylinder pressure characteristics of these variations in operating conditions were observed experimentally. Also, the smoke emission was predicted by using the Arrhenius equation and empirical equation of the smoke emission was made. At the same time, the correlations, between the combustion and smoke emission characteristic were examined. From the above results, it is clear that to prevent power dropping and to decrease exhaust fume whin the conditions are changed, one should improve the intake system. To do this, the best way is to lower the air-fuel mixing ratio. We found that the parameters of the indicated mean effective pressure, maximum pressure and its location and combustion duration, etc. change the motion in accordance with the conditions described above. Also, we found that the variation of the pressure cycle comes from an amplified variation of the early part of process. From the analysis of comparing combustion and exhaust fume, the exhaust fume is produced at the latter time of combustion and decreased when the combustion ratio is higher. Also, we developed a special formula which can predict the exhaust fume value according to the engine load and speed.

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