• Journal of Mechanical Science and Technology
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• v.14 no.6
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• pp.699-703
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• 2000

Experiments were carried out to investigate the characteristics of the hydrocarbon (HC) emissions and to reduce cold start hydrocarbons in gasoline engines. An HC adsorber was, used and it coated was by Pd/Rh catalyst with zeolite on a honeycomb monolith. The HCs were efficiently trapped at temperatures below $100^{\circ}C by physical adsorption. After adsorption, they were reduced gradually by the catalytic oxidation of Pd/Rh catalysts as the adsorber temperature increased above $100^{\circ}C. Increasing amounts of methane, ethylene and n-butane were emitted as the fuel-air mixture became richer and the engine speed decreased. As the temperature of adsorber increased, high-number carbons into low-number carbons. Thus, the C4 concentration decreased significantly during the first 30 seconds, and the C2 concentration increased continuously.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.9 no.1
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• pp.53-59
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• 2000

Recently air pollution is increased according to increase of vehicle. So many countries are studying about compressed natural gas engine. Research on the development of CNG dedicated engine that has important meaning both as a clean fuel and an alterna-tive energy to reduce the exhaust emission from diesel engine are actively going on these days. In this study the character-istics of CNG engine was investigated and the engine performance experimented by changing the parameters such as boost pressure. The CNG engine performance and exhaust emission were measured by engine performance mode at maximum load condition with increasing the rpm in the range of 1,000-2,200rpm. The exhaust emission was also measured at D-13 mode and compared to the emission regulation.

• 한국신재생에너지학회:학술대회논문집
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• 2009.06a
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• pp.644-647
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• 2009

In this paper, the study is researched for related safety standards having experiments concerning temperature changes in type IV cylinder of the Hydrogen fuel cell vehicle. Experiments were performed to acquire temperature data of type IV cylinder according to filling time. The experimental results are shown that internal temperatures of type Ⅳ vessel are over $85^{\circ}C$ at all measured points after 5 minutes at filling 35 MPa and the highest temperature is getting lower when the residual gases are more remained. Consequently, the safety standards need properly limited value through further study for filling flow rate and filling time.

• Journal of Korean Society for Atmospheric Environment
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• v.12 no.5
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• pp.517-521
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• 1996

Surface soils sampled at several sites in Seoul, Korea were analyzed to determine the concentrarions and distributions of PAHs. Results are as follow; 1) The Bap concentration in soils was found to be the highest in the industrial area (128 ng/g) and lowest in the residential area(19 ng/g). 2) The Py concentration in soils was highest in the tunnel area (1,110 ng/g) and the lowest in the Achasan area(18 ng/g). 3) The BghiP concentration in soils was higher in road (538 ng/g) and tunnel (532 ng/g) areas than in others areas. 4) It was shown that the PAHs concentrations in residential areas were affected by combution of fossil fuel, those in industrial, road, tunnel, terminal and commercial areas were affected by vehicle exhaust.

• Transactions of the Korean Society of Automotive Engineers
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• v.11 no.3
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• pp.65-70
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• 2003

In this paper, an adapted TWC model and its application to the monitoring algorithm are proposed. As TWCs have the different characteristics, the model has to be corrected to diagnose more accurately. In the TWC model oxygen storage and release rate model are adapted to the installed TWC to whose characteristics related. The model learns from the downstream $O_2$ sensor output during the vehicle's operation. From the results, the model is adapted to the Installed TWC's characteristics. using this model, the monitoring algorithm can diagnose the no more accurately. Finally the algorithm is validated with simulations using the data logged from a retail car.

• Journal of Energy Engineering
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• v.24 no.3
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• pp.27-33
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• 2015

Recently, global warming has been accelerated due to air pollution and air pollutants are coming from the exhaust of the ICE vehicles, which are gradually increasing in number globally. That is why all the countries in the world are striving to reduce pollutant emissions of automobiles by strengthening regulations on air pollution. To comply with the regulations, the auto industry came up with hybrid vehicles, which have features of both ICE vehicles and electric vehicles. Hybrid vehicles show improvements in emissions, fuel efficiency, as well as functions as electric vehicles. This study aims to show possible troubles that occur at times of damages in high-voltage systems, and to suggest responsive measures.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2010.04a
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• pp.42-42
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• 2010

• Proceedings of the KIEE Conference
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• 2007.10c
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• pp.264-265
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• 2007

본 논문에서는 하이브리드 전기 자동차(Hybrid Electric Vehicle, HEV)의 실제 주행패턴 데이터를 기준으로 하이브리드 전력 시스템용 양방향 DC-DC 컨버터를 설계하고, 시뮬레이터를 구성한다. HEV의 주행패턴 데이터 중 가 감속 구간 일부를 선택하여 전기적 부하 변화로 모델링하고, 이를 통해 양방향 DC-DC 컨버터의 모드별 동작을 시뮬레이션 한다.

• Transactions of the Korean Society of Automotive Engineers
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• v.18 no.3
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• pp.8-18
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• 2010

According to the needs of change to hybrid, fuel cell and electric vehicle, and to the increasing demand for safety and eco-friendliness, the necessity of Electro-Mechanical Brake(EMB) is being increased. But, one of the most important problems for realizing EMB to the practical use is that the required motor power for braking is too high. So the high braking efficient EMB is required. In recent years, the Electronic Wedge Brake(EWB) is noticeable for the high braking efficiency. In this research, we examine the improvable matter of the recent published EWB, and we propose the improved mechanism and the cost effective control method using this mechanism. And we test these feasibility by experiment and discuss these meaning and effect.

• Proceedings of the Korea Contents Association Conference
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• 2011.05a
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• pp.333-334
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• 2011

연료전지 자동차 기술 분야에서 한국의 현대자동차가 243건으로 가장 많은 등록특허를 보유한 것으로 나타났으며, 일본의 HONDA MOTOR가 220건, TOYOTA MOTOR가 153건의 특허를 보유하고 있는 것으로 나타났다. 주요출원인별 IPC 분포를 통해 연구개발 역점분야를 살펴보면, 주요 상위 출원인은 전지(H01M), 전기장치 또는 추진장치의 배치(B60L), 동력 전달 장치의 배치(B60K) 분야에 연구개발이 집중되었으며, 현대자동차는 전지(H01M), 전기장치 또는 추진장치의 배치(B60L) 분야 이외에 운전제어시스템(B60W), 냉각(F01P) 분야의 연구가 다른 업체에 비해 활발한 것으로 나타났다.