• 제목/요약/키워드: Emission Regulation

검색결과 401건 처리시간 0.021초

소형디젤엔진용 산화촉매에 의한 미 규제 배출가스 저감특성에 관한 연구 (A Study of Unregulated Emission Reduction Characteristics by Diesel Oxidation Catalyst (DOC) for Light-Duty Diesel Engine)

  • 김기호;안균재;강금원;이성욱;엄동섭;이태영
    • 한국자동차공학회논문집
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    • 제14권2호
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    • pp.145-150
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    • 2006
  • Recently emission regulation on diesel vehicles is getting stringent and research on aftertreatment technology such as DPF and DOC has been carried out actively. Even though PM(Particulate matters) reduction efficiency in DOC is relatively low but the structure is simpler and very effective in the reduction of gas materials and unregulated materials. Therefore it has been applied to smaller diesel vehicles. The aims of this research is to investigate the emission reduction characteristics of DOC; DOC performance of regulated and unregulated material emission reduction. It results a Pt based catalyst demonstrated higher emission reduction efficiency than a Pt-V based catalyst in CVS-75 mode, and also the reduction efficiency of unidentified material was excellent.

기후변화 협약 이행관련 국내.외 항공정책에 관한 연구 (A Study on The Aviation policy for UNFCCC of Korea and Other states)

  • 민진아;김선이
    • 한국항공운항학회지
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    • 제20권2호
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    • pp.32-38
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    • 2012
  • The United Nations (UN) has tried to make international agreement to restrict artificial greenhouse gas emissions and the UN has concluded the UN Framework Convention Climate Change (UNFCCC) and the Kyoto protocol. Moreover, in 2012, the European Union announced that they will enforce the Directive 2008/101/EC. Therefore, after 2012, aircraft carriers that depart or arrive from EU will follow that regulation. For these reasons, Korea should prepare systematic and effective policy to reduce greenhouse gas emission from aviation activities. The purpose of this study is to find out effective measures to reduce greenhouse gas emission from aviation activities through research by countries all over the world. Here are the 4 measures to reduce greenhouse gas emission from Aviation activities that were found through research UK and Japan's policies. First, Korea should implement aggressive incentive policies. Providing proper incentive can attract voluntary participation of aircraft carriers to reduce greenhouse gas emission. Second, the government should adopt environmental tax on use of fossil fuels. Third, Korea should adopt the greenhouse gas Emissions Trading Scheme (ETS). Lastly, the Korea government should pull in with the international community to establish world-wide environmental policies.

LPL EGR System 적용 대형 디젤엔진의 EURO-5 NOx 규제대응에 관한 연구 (Study on Low Pressure Loop EGR System for Heavy-duty Diesel Engine to Meet EURO-5 NOx Regulation)

  • 이교승;백문열;박형배
    • 동력기계공학회지
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    • 제11권4호
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    • pp.12-17
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    • 2007
  • Recently, many small and medium size diesel vehicles have been equipped with turbocharger and EGR system to get high performance and reduce $NO_x$ emissions but its application to heavy-duty diesel engine is not common yet. In this work, the simulation model for EURO-3 engine was developed using WAVE and then its performance and emission level were verified by comparing with experimental results. The possibility of current EURO-3 engine equipped with LPL EGR system which would be satisfied the EURO-5 regulation are examined. ESC 13 mode was chosen as the primary engine test mode, and the injection timing and fuel quantity were changed to compensate the lost engine performance caused by EGR. The system developed in this study shows that the current EURO-3 engine could satisfy EURO-5 $NO_x$ regulation by applying LPL EGR.

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시험온도에 따른 LPG 차량의 저온 시동성 및 배출가스 배출특성 연구 (A Study on the Cold Startability and Emission Characteristics of LPG Vehicle According to Test Temperature)

  • 이민호;김성우;김기호;하종한
    • 한국가스학회지
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    • 제18권6호
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    • pp.7-13
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    • 2014
  • 국내 외에서 대기 오염에 대한 관심은 높은 편이며, 자동차 및 연료 연구자들은 깨끗한 (친환경 대체연료) 연료와 연료 품질에 맞춘 새로운 엔진 설계의 구성, 혁신적인 후처리 시스템 등의 접근을 통하여 차량의 배기가스 배출을 줄이려고 노력하고 있다. 이러한 연구는 다음과 같은 다양한 주요 이슈를 가져오게 된다. PM 배출량이 디젤과 가솔린 차량에 대해 규제해야 하는지 여부와 가솔린 및 LPG 차량이 PM 배출가스 규제에서 무시될 수 있는지 여부이다. 마지막으로 온실 가스 (C$CO_2$, $CH_4$, $N_2O$) 규제가 자동차 배출 규제를 포함하여 논의 것 등이다. 자동차의 온실 가스 및 배출가스(PM)는 환경오염, 건강 악영향 등의 원인으로 많은 문제점을 일으키게 된다. 본 논문에서는 자동차 저온 시동성 및 배출가스에 대해 LPG 연료의 영향을 논의하였다. 또한 본 논문은 시험 온도에 대한 배출가스 특성을 평가하였다. 이때의 시험온도는 시험모드 상의 온도와 국내 겨울철 최저온도를 기준으로 나누어서 실시하였다. 본 연구를 통해 시동성 및 배출가스, 온실가스 배출의 상관관계를 분석하고자 하였다.

박폭 저장력 피스톤 링 팩에 대한 마찰저감 연구 (A Study on Friction Reduction Related with the Piston Ring Pack with Thinner Width Ring and Lower Tension Ring)

  • 전상명
    • Tribology and Lubricants
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    • 제25권5호
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    • pp.348-358
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    • 2009
  • To satisfy the more severe emission regulation and the demand of higher fuel economy in near future, the combustion pressure and power output of engines is going to be higher. In order to get the reduction of engine emission and the higher power, it is needed the reduction of the tension and width of ring pack. The lower tension ring and the manufacturing technology of cast iron thinner width ring can bring the friction reduction between the ring and liner during engine running. Therfore, the fuel economy can be achieved. Thereafter the engine emission can be reduced. In this study, by using a developed basic computer program that predicts the inter-ring pressure, the motion of ring and the inter-ring pressure through a crevice volume model between adjacent rings, and the oil film thickness and the friction computed by lubrication theories, it is to be examined the effect of friction reduction from piston ring pack equipped with thinner width ring and lower tension ring.

공기 보조 미립화 인젝터의 미립화 메카니즘 해석에 관한 연구 (A Study on the Analysis of Atomization Mechanism for the Air Shrouded Injector)

  • 김봉규;이기형;이창식;서영호
    • 한국자동차공학회논문집
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    • 제9권1호
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    • pp.57-62
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    • 2001
  • EFI system has severe problems of heavy HC emission generated by large fuel droplets and non-uniform air-fuel mixture. Therefore, various atomization techniques are being developed in order to reduce HC emission. The one among those techniques is ar shrouded injector, which has better atomization ability and demands less power loss than other atomizers. Thus, the development of this air shrouded injector can be major topic to cope with international emission regulation. Nevertheless, there are few domestic and foreign studies which deal with air shrouded injector. In this study, the spray characteristics and atomization mechanism of the representative air shrouded injector were analyzed using PDPA system. From experimental results, the definite standards of air shrouded injector's spray characteristics were established.

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디젤엔진 배기가스 정화용 산화촉매 개발 (Development of Oxidation Catalyst for Diesel Engine)

  • 최경일;최용택;유관식
    • 한국대기환경학회지
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    • 제16권5호
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    • pp.529-537
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    • 2000
  • Several Pt-based oxidation catalysts with different loading were prepared with various metal precursor solutions and characterized with H$_2$ chemisorption and TEM for Pt particle size. V was added to Pt-based catalyst for inhibiting SO$_2$oxidation reaction, as result, Pt-V/Ti-Si catalyst prepared by ERMS(Free Reduced Metal in Solution) method showed high enough activity and better inhibition on SO$_2$oxidation than Pt only catalyst. Optimum Pt particle size for diesel oxidation reaction turned out to be the size of around 20 nm. A prototype catalyst was prepared for light=duty diesel passenger car, and teated for the emission reduction performance with Korean regulation test mode(CVS-75 mode) on chassis dynamometer. The catalyst shows the performance reduction of 75~94% for CO, 53~67% for HC and 10~31% for PM. In the case of heavy-duty diesel catalyst, the domestic formal regulation teat mode D-13 was adopted for both Na engine and Turbo engine. The conversions of CO and THC are high enough(86% and 41%) while the reductions of NOx and PM are relatively low(3~11%).

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비도로용 디젤엔진의 분사시기 및 인젝터 변경에 따른 배출가스 특성 연구 (Effect of Injection Timing and Injector Hole Number on Emission Characteristics for Off-road Diesel Engine)

  • 김훈명;강정호;한다혜;정학섭;표수강;안중규
    • 한국연소학회지
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    • 제19권2호
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    • pp.15-20
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    • 2014
  • Environmental regulations are being reinforced for the solution of environmental pollution, that are global issues. Exhaust gas regulations of off-road engines also demand stepwise reduction emission from beginning of Tier 4 interim(2013). Characteristically, Tier 4 regulation apply the NRTC mode which is a transient cycle. And technical studies using NRTC mode are uncommon. In this study, for satisfy the Tier 4 final regulation on the NRTC mode, experimental study was conducted using a 3.4 L off-road engine. Fuel injection timing and injector hole number are chosen as parameters for investigation of combustion and exhaust gas characteristics on off-road diesel engine.

유럽 CO2 감축법에 따른 차량 CO2 감축 기술 전략에 관한 연구 - 보기류 개선을 중심으로 - (Study on the Strategy of CO2 Reduction Technology in Vehicle according to CO2 Emissions Regulation in EU - Focusing on Auxiliary Energy Improvement -)

  • 석규업;윤형진
    • 한국자동차공학회논문집
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    • 제23권2호
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    • pp.230-238
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    • 2015
  • The main purpose of this paper is to suggest opportunities for reducing $CO_2$ emission in energy conversion of a vehicle, focused on auxiliary energy improvement in the automotive field. As part of worldwide efforts to curb global warming and to protect the domestic industry as trade barriers, many countries have set goals to regulate greenhouse gas emissions. As an example, new $CO_2$ emission regulation in EU was expected to go into effect strictly in 2020. Therefore, global car-makers need to establish strategic responsiveness of the regulations. This paper shows $CO_2$ economic value by using the correct interpretation of the relevant laws and regulations. The $CO_2$ value analyzed using quantitative figures leads to the possibility of auxiliary(accessories, HVAC, electric apparatus etc.) technology for improving fuel economy. As a result, this study generalizes the meaning of electric power saving for each driving mode by auxiliary energy improvement.

대형디젤엔진의 저온연소 시스템 최적화에 관한 연구 (A Study of Low Temperature Combustion System Optimization for Heavy Duty Diesel Engine)

  • 한영덕;심의준;신승협;김득상
    • 한국자동차공학회논문집
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    • 제23권2호
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    • pp.178-184
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    • 2015
  • According to the regulation on the environment and fuel efficiency is becoming strict, many experiments are conducted to improve efficiency and emission in internal combustion engines. LTC (Low temperature combustion) technology is a promised solution for low emissions but there are a few barriers for the commercial engine. This paper includes optimization that applies LTC method to heavy duty diesel engine. Adequate LTC was applied to low and middle load as adaptability in heavy duty diesel engine, and optimization focused on reduction of fuel consumption was proceeded at high load. Through this research, strategy for practical use of LTC was selected, and fuel consumption has improved on the condition that satisfies the emission regulation at systematic viewpoint.