http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
전성용(Sungyong Jeon),이천환(Chunhwan Lee),김덕진(Deokjin Kim),오광철(Kwangchul Oh),이종인(Jongin Lee),이춘범(Chunbeom Lee),권태희(Taehee Kwon),조재득(Jaedeuk Jo) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Today diesel engines are used extensively in the automotive, because they have excellent fuel economy and performance. But emissions from diesel engines are a significant air-quality issue by high emission of the NOx and PM. Many methods of aftertreatment have been developed since the advent of emission standards for diesel engines. The diesel aftertreatment system can be classifie into various categories by its target emission and reduction mechanism. The control methods and operating conditions are very important consideration for an each aftertreatment system. It is necessary to test with engine dynamometer precisely, since the characteristics of diesel emission are important parameters for the development of aftertreatment system. Although engine dynamometer test is necessary, it is not cost-effective. To reduce the prime cost, it is needed to build more cost-effective test equipments, In this work, the simple evaluation system was examined as a means of testing cost-effective using a real diesel engine and water-brake system.
권태희(Taehee Kwon),전성용(Sungyong Jeon),나승우(Seungwoo Rah),김덕진(Deokjin Kim),오광철(Gwangchul Oh),이천환(Cheonwhoan Lee),이춘범(Chunbum Lee) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
The new diesel injection system was developed for active regeneration DPF using catalyst. The developed diesel injection system is designed for the medium duty commercial vehicles, and can be operated independently to the engine of the vehicles. This injection system consists of a diesel injector that can make fine spray of diesel with or without compressed air, a dosing module that can supply pressurized diesel and air, and an ECU that can control the diesel injector and the dosing module. The performance of the injection system is introduced in this paper. The fuel rate of this system can support the exhaust mass flow of medium duty commercial vehicles. One of the characteristics of this system is that the spray angle is varied corresponding to air/fuel ratio in the chamber of the diesel injector. The diameter of atomized diesel is reasonably small, so that the diesel spray can be mixed with exhaust gas. Based on these performances of this system, now efficient tool for the active regeneration DPF is available, so that soot in the DPF can be removed excellently.
EURO-Ⅳ대응 상용디젤엔진의 SCR 시스템 적용에 따른 나노입자 배출 특성
이천환(Chunhwan Lee),오광철(Kwangchul Oh),김덕진(Deokjin Kim),이종인(Jongin Lee),전성용(Sungyong Jeon),이춘범(Chunbeom Lee),이동인(Dongin Lee),김상호(Sangho Kim),한현식(Hyunsik Han),배재호(Jaeho Bae),김은석(Eunseok Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is well known that two representative methods satisfy the condition of EURO-Ⅳ regulation from EURO-Ⅲ. The first method is the reduction of NOx in an engine operation by utilizing EGR and the elimination of increased PM by DPF. However, it results in bad fuel efficiency. The second is the strategy to reduce PM and emit the high NOx concentration. In other words, the concentration of PM produced by high efficiency combustion sufficiently meets the requirement of regulation, and NOx generated in this process can be removed by SCR system. While it has a good fuel efficiency relative to the first method mentioned above, its social infrastructure is demanded. In this paper, the number distribution of nano PM has been evaluated analyzed by Electrical Low Pressure Impactor(ELPI) in two different case of engine condition, EURO-Ⅲ base engine with DPF system and EURO-Ⅳ level engine(modified from EURO-Ⅲ) with SCR system. From the result of this study, the number distribution of nano PM in a modified EURO-Ⅳ engine was similar level compared to the result of EURO-Ⅲ engine installed DPF system. In case of EURO-Ⅳ engine with SCR system, the particle number was increased slightly in proportion to the amount of urea injection on big size particles, whether AOC is used or not.
EURO-Ⅳ대응 상용디젤엔진의 SCR 시스템 적용에 따른 나노입자 배출 특성(Ⅱ)
이천환(Chunhwan Lee),오광철(Kwangchul Oh),김덕진(Deokjin Kim),이종인(Jongin Lee),전성용(Sungyong Jeon),이춘범(Chunbeom Lee),이동인(Dongin Lee),김상호(Sangho Kim),한현식(Hyunsik Han),배재호(Jaeho Bae),김은석(Eunseok Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is well known that two representative methods satisfy the condition of EURO-Ⅳ regulation from EURO-Ⅲ. The first method is the reduction of NOx in an engine operation by utilizing EGR and the elimination of increased PM by DPF. However, it results in bad fuel efficiency. The second is the strategy to reduce PM and emit the high NOx concentration. In other words, the concentration of PM produced by high efficiency combustion sufficiently meets the requirement of regulation, and NOx generated in this process can be removed by SCR system. While it has a good fuel efficiency relative to the first method mentioned above, its social infrastructure is demanded. In this paper, the number distribution of nano PM has been evaluated analyzed by Electrical Low Pressure Impactor(ELPI) in case of Urea-SCR system applied. From the results, The particle number was increased slightly in proportion to the amount of urea injection on Fine Particle Region, whether AOC is used or not.
조치훈(Chihoon Jo),김종성(Jongsung Kim),손미진(Mijin Son),천재승(Jaeseung Cheon),최혁수(Hyeoksoo Choi),전성용(Sungyong Jeon) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
An electronic wedge brake (EWB) uses the wedge principle to provide a self-reinforcement mechanism, resulting in reduced power to the actuation motor. However, EWB needs mechanical device for adjust of pad wear, even if EWB need a extra equipment in order to compensate adjust of pad wear, and it has disadvantage that braking force can not be occurred and controled if CAN or supplied power are disconnected. The hEWB has fast response and mechanical backup using wedge mechanism and hydraulic system when the hEWB is failed. In this study, hEWB with a proposed structure is designed and developed and the braking performance of the proposed hEWB was verified using test rig and vehicle testing.