• Journal of Power System Engineering
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• v.12 no.5
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• pp.5-13
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• 2008

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1996.10a
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• pp.73-74
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• 1996

• Journal of Advanced Marine Engineering and Technology
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• v.20 no.3
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• pp.1-10
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• 1996

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1996.10a
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• pp.77-78
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• 1996

• Transactions of the Korean Society of Machine Tool Engineers
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• v.16 no.3
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• pp.56-63
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• 2007

Modern diesel vehicle has to comply with the EURO IV, V regulation with low level of particulate matter and smoke emission Moreover, emission standards of each countries are becoming stringent in advanced countries such as USA and Europe. Because Bio-diesel is similar to diesel fuel, it is essential to judge the environmental and health effects deriving from the use of Bio-diesel in diesel engine. The deterioration characteristics of emission in accordance with aging vehicles must be regulated for Bio-diesel. Therefore, under 1200 driving hours, 220,000km driving distance condition and full load, the deterioration characteristics of emission were estimated. We could reduce sulfur contents of fuel, particulate matter and smoke emission by using Bio-diesel and conform the influence of engine performance, emission, and fuel consumption by Bio-diesel deterioration

• Transactions of the Korean Society of Machine Tool Engineers
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• v.12 no.6
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• pp.97-103
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• 2003

Currently, due to serious increase of pollution scones, lots of technology has been involved to reduce exhaust gas in diesel engine. But the amounts of exhaust gas can not be decreased somehow due to the increase of diesel vehicles. Moreover, emission standards of each counties are being stringent in advanced countries such as USA and Europe. In the near future, sulfur contents in fuel must be essentially reduced f3r health and environment because sulfur can basically reduce exhaust gas. Therefore, when will be applied to Bio-diesel and ULSD, they could reduce sulfur contents of fuel without aftertreatment and might conform the influence of engine performance, emission, smoke and fuel consumption.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2010.05a
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• pp.578-579
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• 2010

최근 내연 기관에서 엔진상태 및 잠재적인 결함의 발견을 위해 연료분사, 실린더 내 연소과정, 실린더 내부와 피스톤 마모상태, 흡 배기 밸브 및 과급기 (turbocharger) 등의 상태 모니터링을 통해서 결함에 대한 진단 및 경향관리에 대한 연구들이 진행되고 있다. 본 연구에서는 기 개발된 선박용 대형디젤엔진에 대한 상시 모니터링 시스템을 이용하여 엔진상태 및 잠재적인 결함을 진단하고자 하였으며, 일차적으로 가속도 신호를 이용하여 실린더 내 연소과정에서 정상적인 상태와 착화실패에 따른 진동 양상을 비교 분석하였다. 신호 분석 기법으로 시간-주파수 분산 기법들은 충격파 신호인 엔진 폭발신호를 분석하는데 적합하였으며, 그 기법들 중 Short Time Fourier Transform 기법과 Wavelet Transform 기법을 이용하였다.

• Journal of Power System Engineering
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• v.10 no.2
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• pp.11-15
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• 2006

The increasing numbers of automobiles keep causing air-pollution problems worse than ever. Nowadays, research on catalyst converter and filter trap as a modern technology is very active because PM is designated as a major cancer material and stringent regulations on this are necessary and required. This research emphasized on the development of Continuously Regenerating DPF technology which was the best particulate matters removing technology of current existing technology because of its superior comparability and high applicability. This experimental study has been conducted with equipped and unequipped a Continuously Regenerating DPF ona displacement 7,000cc diesel engine and compared in terms of engine performance and emission. To measure the emission, D-13 mode is applied and measured quantities of the exhaust gases, particularly in CO, HC, PM, and NOx. Therefore, this research is focused on engine performance and characteristics on exhaust emissions with the application of a Continuously Regenerating DPF in a heavy-duty diesel vehicle.

• Journal of Korea Ship Safrty Technology Authority
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• s.26
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• pp.24-35
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• 2009

본 연구에서는 소형선박용 고속디젤기관의 고장으로 발생되는 해양사고를 저감하기 위하여 엔진의 상태를 사전에 기관운전자가 알 수 있도록 시스템을 구성하여 기존의 엔진에 이상이 발생하였을때 가시가청 경보를 울리는 것보다 한 단계 전에 엔진의 상태를 미리 알 수 있도록 하여, 기관의 고장으로 인한 해양사고 저감에 목표를 두고 과제를 진행하였다. 또한, 대형선박에서 사용하고 있는 고가의 고성능을 발휘하는 고장예측진단시스템은 많이 개발되어 있으나, 영세한 소형어선에 적용할 수 있는 소형의 저렴한 시스템 개발에 최종목표를 두고 1차년도 연구과제를 수행하였다.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.28 no.1
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• pp.52-58
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• 2004

To develop a low emission engine, it is necessary to obtain some better quality of automotive fuels. Sulfur in fuel is transformed to sulfate-laden PM as DOC is applied. Therefore, it necessary to provide low sulfur fuels before DOC is applied. According to the specification of test fuels, flash point, distillation 90％, cetane index are improved but viscosity is decreased in the process of desulfurization. Excessively reduced sulfur may cause to decrease lubricity of fuel and engine performance in fuel injection system. Therefore, this research was emphasized how the application of Bio-diesel affects on the emission characteristics and engine performance under the circumstance of ULSD and DOC.