운행자동차의 동적 제동력 검사장비 도입에 관한 연구

여운석(Unseok Yeo),박원덕(Wondeok Park),정영달(Yongdal Jung),강병도(Byungdo Kang) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5

Fabrication technology continues to improve with the development of the vehicle industry. With these improvement, technology is continuously developed accordingly in various fields. Inspection equipments are used for manufacturing research and development. It is also used to check vehicle in service. There is a variety vehicle inspection. To prevent vehicle accident, to prevent modified vehicle or non-licensed vehicle, to make sure that our transport environment, to keep our environments clean by providing vehicles emission, and to proprietorship, etc..The most important part of the vehicle inspection is encouraging vehicle inspection, and to locate a faulty vehicle then it lead to repair to prevent an accident. Research internal and external, accident by faulty vehicle is occupies half by brake and tire. And brake ability correctly testable about brake to equipment invitation of excellent performance will prevent by faulty brake. Thus, in this study, to fit on advanced internal reality, we institute dynamic braking inspection equipment testable brake ability on driving state(8~12km/h), then go into correlation of the existing Roller brake system. And after improve characteristic analysis of inspection equipment from problem. So in our research, we used the dynamic braking inspection equipment to test brake ability while in motion, then Roller brake system inspection, and the characteristic analysis of the inspection.

신흥국가의 자동차 정기검사 실현을 위한 연구

여운석(Unseok Yeo),백안선(Anseon Back) 한국자동차공학회 2013 한국자동차공학회 학술대회 및 전시회 Vol.2013 No.11

All vehicle should ensure that roadworthiness to service, and Each country operates PTI and Roadside inspection(part of safety) for apposite to the case. In the case of Korea, however, operates PTI only. PTI is operated most countries, and expanded operation Roadside inspection since stabilization of PTI. PTI is likely to be costly to operate because it needs a lot of inspection facility and equipment. For the reason, each country is shared the cost through government-operated or privatization. Developing countries, introducing a vehicle inspection system, have not enough budget and developed network system. So they demand a inspection privatization and prevention weakness inspection. Therefore, they priority should be to establish minimum standard of inspection facilities and equipments that institutional and operational aspect is based on their country feature. The CITA theorizes minimum standard about inspection facilities and equipments but it does not include prevention weakness inspection. So, I"d like to suggest that Korea"s standard operates privatization system for inspection facilities and equipments of Developing countries; supplement standard of prevention weakness inspection. Especially, in recent years, many countries like Philippines, Indonesia, Mongolia, Myanmar, etc. has been an increasing interest in Korea"s vehicle inspection standard and inspection training course. Because of this, we support to the Developing countries for PTI that the establishment of national policies and training course.

운행자동차의 하체검사 개선에 관한 연구

여운석(Unseok Yeo),박원덕(Wondeok Park),정영달(Yongdal Jung),강병도(Byungdo Kang) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5

Vehicle owner can check Engine, Engine oil, and belt condition to do with the emission by opening the bonnet. However, the safety of vehicle has a direct implication with parts such as Steering system, Wheel and Tires, and Power trans system. They are located in underside of vehicle. To check into defective parts, there needs to be a separate unit such as Pit or Lift. According to CITA guidelines, it is recommended to have Pit or Lift fit up a jack and light, it is required (must have) to have Brake inspection equipment and Head Lamp inspection equipment, while inspection equipment such as, Wheel alignment indicator, Wheel spinner and Wheel play detector is an option. The most important part of vehicle safety inspection item are Underbody Inspection, Braking force Inspection, and Head Lamp Inspection. There are two main parts of Underbody inspection: Pit or Lift. Korea only use Pit Inspection, but developed countries use both with Lift and Pit Inspection depending on the size of vehicle. For an inspection, UVIS Inspection equipment is researched and being developed. Also, Underbody Inspection auxiliary equipment like Wheel play detector, and Underbody hydraulic jack has been adopted to maximize the effectiveness. In this study, we are to ensure the most effective Inspection.

운행 자동차의 첨단 자동차검사 시스템 도입에 관한 연구

여운석(Unseok Yeo),박원덕(Wondeok Park),정영달(Yongdal Jung),오상엽(Sangyeob Oh),강병도(Byungdo Kang) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11

According to vehicle control regulations in 1917, vehicle inspection system of a vehicle in service has been conducted by the transportation safety authority and non-official servicing shops. In advanced country, a vehicle safety inspection system has been conducted according to its real situation. Especially, Japan, Germany and USA etc. make an effort not only the reliability, but also the quality of a safety inspection service by introducing an advanced vehicle inspection system. But, in korea, trying to improve the operation such as the development of a computing system, the automation of inspection equipment and inspection standard service etc. by the transportation safety authority during about 50 years, the existing vehicle safety inspection system has been conducted without the improvement of a special legal and system. In this study, in order to develope and introduce an advanced vehicle safety inspection system, which apply flexibly to new vehicle design technology and consider to the reliability and facility, we try to improve the efficiency of advanced safety inspection methods by comparing exist safety inspection methods with advanced safety inspection methods. And advancing the safety inspection equipment on the base of this study"s result, the purpose of this study make an offer to not only setting the equipment with applicable in inspection center, but also increasing the effectiveness of the vehicle inspection system, withdrawing inconvenience according to inspection a vehicle in service, and optimal servicing a vehicle safety inspection. Especially, up to now, the study on a safety inspection for a vehicle in service after a delivery new vehicle was not sufficient, we provide the fundamental data to a government policy on the base of this study"s result.

운행 이륜자동차 배출가스 검사제도 도입 타당성 연구

정영달(Youngdal Jung),여운석(Unseok Yeo),임영재(Youngjae Lim),류익희(Ikhui Ryu),윤용안(Yongan Yun) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11

In-used 2-wheel vehicles have been used as important means of transportation, but the exhaust gas management system has been left without any alternative. In particular, some two-wheeled vehicles and no catalyst, 2-stroke engines using a mixture of fuel oil combustion emissions, despite not established acceptance criteria and test system does not provide a comprehensive management system is required. Thus, throughout the country and abroad to do research to establish the appropriate emissions test, and to set emission standards and emissions inspection program to review the feasibility of introducing, through maintenance and repair methods before and after the comparison test was presented.

[응용논문] 첨단 운전자 지원시스템의 정기검사기술 필요성 연구

강병도(Byungdo Kang),여운석(Unseok Yeo) 한국자동차공학회 2019 한국 자동차공학회논문집 Vol.27 No.9

The automobile industry is expected to actively develop a technology for autonomous vehicles to expand driving convenience and ensure safe driving. Autonomous vehicles have been classified by the advanced safety equipment installed in their vehicles, and cars currently sold are at the level of SAE Level 2. Level 2 autonomous vehicles are equipped with the advanced driver assistance systems(ADAS), which include advanced emergency braking system(AEBS), forward collision warning system (FCWS), lane keeping assist system(LKAS), lane departure warning system(LDWS), and adaptive cruise control(ACC). As these advanced safety devices cause traffic accidents due to failure and malfunctions, there is a need to develop standards and methods for periodic inspections. In this study, the periodic inspection technology applied to overseas advanced safety devices was investigated and based on this, the necessity of developing an inspection technology for advanced auto safety devices in Korea was studied.

대형 경유자동차 배출가스 검사방법 개선에 관한 연구

정영달(Youngdal Jung),여운석(Unseok Yeo),임영재(Youngjae Lim),류익희(Ikhui Ryu),윤용안(Yongan Yun) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5

The method of emission inspection for In-use diesel vehicles has been Engine speed type Lug-down 3mode. This method could bring damage to decrepit vehicles under high speed and High load condition and it could not apply the driving pattern on the road. For these reasons, this study has started to create new emission inspection which is appropriate for Koreas road infrastructure. KD 147 would be applied to Light-duty diesel vehicles from July 2010 after model operations. Therefore, this studies has investigated new emission inspection system for Heavy-duty diesel vehicles, except for Light-duty diesel vehicles.

운행 경유차 정밀검사방법 개선에 관한 연구

정영달(Youngdal Jung),여운석(Unseok Yeo),임영재(Youngjae Lim),류익희(Ikhui Ryu) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4

Current emission inspection procedure for the diesel vehicle is Lug-down 3 mode. It is effective for high-emitting vehicles as vehicles are inspected under the high-load and high-speed condition, but it has weak points. It does not reflect the traveling pattern such as acceleration or speed reduction, and there is possibility to be manipulated before and after the inspection. In particular, in case of some older vehicles, it makes some damages during the inspection. As it also makes noise and dust, we conduct this research to improve the related problems and examine the new emission inspection.

운행 휘발유 자동차 배출가스 검사방법 개선에 관한 연구

양진호(Jinho Yang),여운석(Unseok Yeo),조현우(Hyunwoo Jo),김현준(Hyunjun Kim),이호상(Hosang Lee) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11

As interest in the environment increased, a law was established to diagnose emission-related parts and turn on MIL when defects are found, and applied to automobiles sold in California after 1988. However, there was a need for technology development to detect these devices because they generate a lot of emissions when they malfunction. Through this study, we wanted to examine whether OBD inspection is possible in-used vehicles. A test was conducted to analyze the correlation between the OBD test and the exhaust pipe test. A defect in OBD does not necessarily result in high emissions, but it has been shown that more emissions are generated on average. Therefore, it was confirmed that vehicles with a high possibility of generating exhaust gases can be selected through OBD inspection. OBD inspection can detect failures before exhaust gas-related parts are completely damaged, so it is necessary to introduce OBD inspection into vehicle inspection in order to detect early failure of emission-related parts.

대형 경유자동차 배출가스 검사방법 개선에 관한 연구

정영달(Youngdal Jung),여운석(Unseok Yeo),윤용안(Yongan Yun),홍민성(Minsung Hong) 한국자동차공학회 2014 한국 자동차공학회논문집 Vol.22 No.1

The method of emission inspection for Heavy-duty diesel vehicles has been engine speed type Lug-down 3mode. This method could bring damage to decrepit vehicles under high speed and high load condition and it could not apply the driving pattern on the road. For these reasons, this study has started to create new emission inspection which is appropriate for Koreas road infrastructure. KD 147 would be applied to light-duty diesel vehicles from july 2010 after model operations. Therefore, this study has investigated new emission inspection system for heavy-duty diesel vehicles, except for light-duty diesel vehicles. In consideration of domestic conditions to meet the new load test method in this study, the Lug-down3 mode vehicle speed method was developed for the first time in korea.