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디젤엔진을 이용한 2단 VGT 및 EGR 적용특성에 관한 실험적 고찰
정재우(Jaewoo Chung),강정호(Jeongho Kang),이호길(Hogil Lee),김남호(Namho Kim),정동영(Dongyoung Jeong) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
In this paper, it is discussed that the NOx and smoke emission performances in a Diesel engine equipped with 2-stage VGT(variable geometry turbocharger) and EGR loop systems of 2 types As the installation of 2 stage VGT system, intake air flow rate could be increased. So, Nox could be reduced by high EGR rate compared with the base single VGT system. And , in EGR loop type engine tests, characteristics of LP(low pressure) and HP(high pressure) EGR system with 2-stage VGT system have been investigated. In these tests, performances of Lp loop EGR system have been seriously effected by the back pressure caused by BPV(back pressure valve) angle and EGR loop system.
5속 A/T용 댐퍼 클러치의 슬립 제어에 따른 주행 및 연비 특성
김덕중(Deokjung Kim),이기수(Geesoo Lee),김현철(Hyunchul Kim),허형석(Hyungseok Heo),이호길(Hogil Lee),장재덕(Jaeduk Jang),조용석(Yongseok Cho) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In recent years, the technologies for reduction of fuel consumption have became increasingly important due to protecting the global environment in an automotive industry. In line with this trend, energy loss in the transmission was mostly associated with the damper clutch slip in a torque converter. The aims of this paper were to introduce and evaluate of the characteristics of slip-controlled damper clutch system developed for the 5-speed transmission of 2,400 cc gasoline engine. The control design of technique was based on the PID controller with respect to engine road. At proving ground, driving characteristics of vehicle according to slip control parameters were evaluated. To attain slip-controlled damper clutch system, fuel economy mode test such as FTP-75 mode, Highway mode and NEDC mode for vehicle were conducted. As a results, fuel consumption of vehicle with slip-controlled damper clutch system effectively decreased by 5.5%, compared to the base system at FTP-75 mode.
시제작 DME 자동차의 VGT와 EGR의 적용에 관한 연구
정재우(Jaewoo Chung),강정호(Jeongho Kang),김남호(Namho Kim),이호길(Hogil Lee),정수진(Soo-Jin Jeong),강우(Woo Kang) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
In this steady, mode tests(NEDC, CVS75) of proto-type common-rail DME vehicle were performed to investigate on the effect of EGR and VGT application. To these researches, VGT model , engine model and construction of engine calibration process for engine control set maps were performed . Also the limit A/F of a DME engine considering emitted CO concentrations and VGT mating property with DME engine. As the vehicle tests results, increasement of inlet air flow with VGT system reduced HC and CO concentrations, and application of EGR reduced NOx emission of DME vehicle.
Crankcase Ventilation System의 차량 적용에 따른 배출가스 특성 연구
김진용(Jinyong Kim),나병철(Byungchul Na),서준호(Joonho Seo),박승욱(Seunguk Park),이호길(Hogil Lee),이봉현(BongHyun Lee),최승배(Seungbae Choi) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently social awareness on environmental issues including air pollution has been raised, and related laws and regulations have been reinforced. In the circumstances, the development of common rail diesel engine has been progressed, which can correspond with EURO Ⅳ & Ⅴ and has low-noise, strong-power and excellent fuel efficiency. This research aims to develop parts for Advanced Fuel/Oil Filtering Re-circulation applicable to this kind of regulation proof engines. These parts can playa role of converting traditional air emission type crankcase into recovery type crankcase so that the engine can deal with environmental regulations, which do not allow minimal amount of toxic gas discharge. The results showed that emission characteristics of the vehicle after install CCV(Crankcase Ventilation) System was higher than before install CCV system in vehicle emission test.
나병철(Byungchul Na),김병수(Byungsoo Kim),이천환(Chunhwan Lee),강정호(Jungho Kang),이호길(Hogil Lee),김진용(Jinyong Kim) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The emission reduction technology for diesel vehicle is classified as fuel substitution, improvement of diesel combustion quality, and development of diesel exhaust gas after-treatment. The most effective way for the emission reduction technology is known as to be exhaust gas after-treatment system, and this field of research is evaluated by many groups. The Diesel Oxidation Catalyst (DOC) system has many advantages of reducing particulates and harmful gaseous substances such as CO, HC. Also, it is simple in device structure, relatively low cost, and easy to install without retrofitting the vehicle. Recently, the DOC system has been used for the most diesel vehicles in the European countries. In this study constructed a new fast aging mode for DOC and carried out conversion efficiency test for fresh and aged catalyst. Also it was evaluated the de-activation characteristics of DOC according to the aging time and applied load conditions.<br/>