• 제목/요약/키워드: IDI diesel engine

검색결과 30건 처리시간 0.02초

개선된 단일영역 열발생량 계산법을 사용한 소형 HSDI와 IDI엔진의 연소특성 비교에 관한 연구 (A Study on the Comparison of the Combustion Characteristics between a Small HSDI and an IDI Diesel Engine by Advanced One-zone Heat Release Analysis)

  • 이석영;정구섭;전충환;장영준
    • 한국자동차공학회논문집
    • /
    • 제12권6호
    • /
    • pp.46-53
    • /
    • 2004
  • Heat release analysis is a very important method for understanding the combustion phenomena inside an engine cylinder. In this study, one-zone heat release analysis was used with the measured cylinder pressures of a HSDI(high speed direct injection) and IDI(indirect injection) diesel engines, Those have benefits of simple equation, fast speed, reliability. The objective of the study is to compare the combustion characteristics between a HSDI and an IDI. The result shoes that the maximum heat release rate of a HSDI is higher than that of an IDI because of long ignition delay period. The heat release curve of an IDI is more linear than that of a HSDI, thus is similiar to that of a SI engine. The combustion efficiency of a HSDI is higher than that of an IDI because of the smaller heat transfer loss of a HSDI. There is a suggestion here that an IDI engine has broad heat transfer area which include two combustion chambers, the connection passage of combustion chambers, etc.

IDI 디젤기관에서 바이오디젤유 적용시 분사시기변화에 따른 기관성능과 매연 및 NOx 배출 특성 (The Characteristics on the Engine Performance, Smoke and NOx Emission for Variation of Fuel Injection Timing in an IDI Diesel Engine Using Biodiesel Fuel)

  • 최승훈;오영택
    • 한국자동차공학회논문집
    • /
    • 제16권4호
    • /
    • pp.75-80
    • /
    • 2008
  • Biodiesel fuel(BDF) can be effectively used as an alternative fuel in diesel engine. However, BDF may affect the performance and exhaust emissions in diesel engine because it has different physical and chemical properties from diesel fuel such as viscosity, compressibility and so on. To investigate the effect of injection timing on the characteristics of performance and exhaust emissions with BDF in IDI diesel engine, it was applied the BDF derived from soybean oil in this study. The engine was operated at seven different injection timings from TDC to BTDC $12^{\circ}CA$ and six loads at a single engine speed of 1500rpm. When the fuel injection timing was retarded, better results were showed, which may confirm the advantages of BDF. The simultaneous reduction of smoke and NOx was achieved at some fixed fuel injection timings of an IDI diesel engine.

바이오디젤유를 사용하는 간접분사식 디젤기관의 내구 및 배기 특성 (The Durability and Exhaust Emission Characteristics of an IDI Diesel Engine Using Biodiesel Fuel)

  • 유경현;오영택
    • 한국자동차공학회논문집
    • /
    • 제14권4호
    • /
    • pp.115-122
    • /
    • 2006
  • To evaluate the durability characteristics of in-direct injection diesel engine using BDF 20(a blend of 20% biodiesel fuel and 80% diesel fuel in volume), an IDI diesel engine used to commercial vehicle was operated on BDF 20 for 300 hours. Engine dynamometer testing was completed at regularly scheduled intervals to investigate the combustion characteristics, engine performance and exhaust emissions. The engine performance and exhaust emissions were sampled at 1 hour interval for analysis. From the results, the combustion variations such as the combustion maximum pressure($P_{max}$) and the crank angle at which this maximum pressure occurs(${\Theta}_{Pmax}$) were not appeared during long-time dynamometer testing. Also, BSFC with BDF 20 resulted in lower than with diesel fuel. The peak pressure with BDF 20 was higher than that with diesel fuel due to the oxygen content in BDF. And, BDF 20 resulted in lower emissions of carbon monoxide, carbon dioxide, and smoke emissions with a little increase of oxides of nitrogen than diesel fuel. It was concluded that there was no unusual deterioration of the engine, or any unusual change in exhaust emissions during the durability test of an IDI diesel engine using BDF 20.

BDF 20을 사용하는 디젤기관들의 연소 및 내구특성 (Combustion Characteristics and Durability of Diesel Engines Burning BDF 20)

  • 유경현;오영택
    • 한국자동차공학회논문집
    • /
    • 제15권3호
    • /
    • pp.18-28
    • /
    • 2007
  • Three diesel engines were fueled with BDF 20, a blend of 80% diesel fuel and 20% biodiesel fuel by volume, and run in excess of 200 h to evaluate their combustion characteristics and durability. The engines used for this study were a 4-cylinder 2476-cc displacement IDI diesel engine(Engine 1), a 4-cylinder l732-cc displacement IDI diesel engine(Engine 2), and a single cylinder 673-cc displacement DI diesel engine(Engine 3). Engine dynamometer testing was performed on each engine at regularly scheduled intervals to monitor the performance and exhaust emissions, which were sampled at 1h intervals for analysis, The peak combustion pressure with BDF 20 increased in Engines 1 and 3 over that measured when burning pure diesel fuel, but that in Engine 2 remained constant. Combustion parameters, such as the maximum combustion pressure and corresponding crank angle, did not change over the long-term dynamometer testing. The BSFC with BDF 20 in Engine 1 was less than that measured with pure diesel fuel. The amount of smoke produced with BDF 20 was less for all engines ; the greatest reduction was observed for Engine 3. The NOx emissions were lower in the IDI engines than the DI engine. The traditional trade-off between smoke and NOx emissions was maintained for BDF 20 fuel for Engines 1 and 3. There was not a big difference in the $CO_2\;and\;O_2$ emissions for BDF 20, as compared to pure diesel fuel, but more $CO_2$ was exhausted by Engine 1 than by Engines 2 or 3 and less $O_2$ was exhausted by Engine 1 than by Engines 2 or 3. The engine parts remained clean, except for some carbon attached to the area surrounding the nozzle hole of the DI diesel engine.

바이오디젤유를 사용하는 디젤기관에서 연료분사시기 변화에 따른 기관성능 및 배기배출물 특성 (Effect of Fuel Injection Timing on the Performance and Exhaust Emissions in IDI Diesel Engine Using Biodiesel Fuel)

  • 유경현;오영택
    • 한국자동차공학회논문집
    • /
    • 제12권2호
    • /
    • pp.76-82
    • /
    • 2004
  • Biodiesel fuel(BDF) which is easily produced from vegetable oils such as soybean oil and rice bran oil can be effectively used as an alternative fuel in diesel engine. However, BDF can affect the performance and emissions in diesel engine because it has different chemical and physical properties from diesel fuel. To investigate the effects of injection timing on the characteristics of performance and emissions with BDF in IDI diesel engine, BDF derived from rice bran oil was considered in this study. The engine was operated at six different injection timings and six loads at a single engine speed of 2000rpm. When the injection timing was retarded, better results were obtained, which may confirm the advantage of BDF. The reduction of NOx and smoke was observed for a 2$^{\circ}$ retarded injection timing without any sacrifice of BSEC.

CHARACTERISTICS OF PERFORMANCE AND EXHAUST EMISSION OF DIESEL ENGINES BY CHANGES IN FUEL PROPERTIES AND APPLICATION OF EGR

  • Choi, S.H.;Oh, Y.T.
    • International Journal of Automotive Technology
    • /
    • 제8권2호
    • /
    • pp.179-184
    • /
    • 2007
  • In this study, the potential use of oxygenated fuels such as ethylene glycol mono-normal butyl ether (EGBE) was investigated in an attempt to reduce the emission of exhaust smoke from diesel engines. Effects of the combustion method on exhaust emission of DI and IDI diesel engines were also examined. Since EGBE is composed of approximately 27.1% oxygen, this is one of several potential oxygenated fuels that could reduce the smoke content of exhaust gas. EGBE blended fuels have been proven to reduce smoke emission remarkably compared to the conventional commercial fuels. The test was conducted with single and four cylinder, four stroke, DI and IDI diesel engines. The study showed that a simultaneous reduction of smoke and NOx emission could be achieved by the combination of oxygenated blend fuels and the cooled EGR method in both DI and IDI diesel engines. It was also found that a reduction rate of exhaust emission in a DI engine was larger than an IDI diesel engine.

와류실식 소형 디젤기관의 연소실 형상이 기관 성능에 미치는 영향(II) (The Effect of Combustion Chamber Shape on the Performance of Swirl Chamber in Diesel Engine(II))

  • 라진홍
    • 한국해양공학회지
    • /
    • 제13권3B호
    • /
    • pp.47-55
    • /
    • 1999
  • A study on swirl chamber for diesel engine is to realize lower fuel consumption and exhaust emission than the current marketing engines. Author formerly reported the performance characteristics of small IDI diesel engine with swirl chamber by changing the jet passage area and its angle, and the depth and shape of the piston top cavity. Following after the first report, in this paper, the characteristics of fuel consumption, soot emission, and exhaust gas temperature were examined and analyzed after dimension of jet passage area expanded to $70.1mm^2$ The results were that the optimum values of the jet passage area depending on the depth of the piston top cavity were different at each engine speeds and loads, and in accordance with application of engine running conditions they were able to be selected as optimum dimensions of each design parameters.

  • PDF

간접분사식 디젤기관에서 바이오디젤연료의 연소 특성 (The Combustion Characteristics of Biodiesel Fuel as an Alternative Fuel for IDI Diesel Engine)

  • 유경현;윤용진;오영택
    • 한국자동차공학회논문집
    • /
    • 제11권1호
    • /
    • pp.72-78
    • /
    • 2003
  • Recently, lots of researchers have been attracted to develope various alternative fuels and to use renewable fuels as a solution of environmental problems from automobile. The use of biodiesel fuel is an effective way of substituting diesel fuel in the long nun. It is a domestically produced, renewable fuel that can be manufactured from vegetable oils, used vegetable oils, or animal fats. In this study, the usability of biodiesel fuel derived from rice ban oil, one of the oxygenated fuels as an alternative fuel for diesel engines was investigated in IDI diesel engine. Emissions were characterized with neat biodiesel fuel and with a blend of biodiesel fuel and conventional diesel fuel. Since the biodiesel fuel includes oxygen of about 11%, it could influence the combustion process strongly. So, the use of biodiesel fuel resulted in lower emissions of carbon monoxide and smoke emissions with some increase in emissions of oxides of nitrogen. It is concluded that biodiesel fuel can be utilized effectively as a renewable fuel for IDI diesel engine.

함산소연료(Diglyme, DEE)와 EGR 방법을 이용한 간접분사식 디젤기관의 배기가스 배출 특성 (The Characteristics of Exhaust Emissions by using Oxygenated Fuels and EGR in IDI Diesel Engine)

  • 유경현;오영택
    • 한국자동차공학회논문집
    • /
    • 제10권6호
    • /
    • pp.108-116
    • /
    • 2002
  • The diesel engine is one of the most effective transport options available in all sizes and covering a wide range of applications. But, many researchers developing the diesel engine are facing tough challenges in view of the increasingly lower emissions standards. Thus, this study will explore the possible fuel additive technology to further reduce the emissions from the IDI diesel engine. The purpose of this study is to investigate the effects of oxygenated fuels on the exhaust emissions and to attain a better trade-off relation between smoke and NOx in four cylinder diesel engine. Experiments were conducted with oxygenated fuels as an effective way to improve the combustion efficiency. Some of oxygenated fuel(Diglyme and DEE) were added to the conventional diesel fuel which had no an oxygen content. Also, EGR was adopted for reducing NOx without any strong adverse effects on other exhaust emissions. This study concluded that exhaust emissions in diesel engine could be reduced by adding the oxygenated fuels which had lower boiling point, and the combustion efficiency was also improved as the oxygen content in fuel increased.

IDI 디젤기관의 단일영역 열발생량 계산 (One-zone heat release analysis for IDI diesel engine)

  • 이석영;김규보;최승환;전충환;장영준;전광민
    • 대한기계학회:학술대회논문집
    • /
    • 대한기계학회 2001년도 추계학술대회논문집B
    • /
    • pp.830-836
    • /
    • 2001
  • An one-zone heat release analysis was studied for a 4 cylinder indirect diesel engine. The object of the study is to calculate the heat release accurately including the effect of specific heat ratio, heat transfer and crevice volume and to find out combustion characteristics of an indirect diesel engine cosidering the effect of both pressure in the main and swirl chambers. The integrated gross heat release values were close to the measured fuel energy at various full load operating conditions.

  • PDF