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[진동·소음부문] 가상 스카이훅 동흡진기를 이용한 승차감 최적화
이관호(Kwanho Lee),유영면(Yungmyun Yoo),박영필(Youngpil Park) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this study, to obtain parameters of dynamic damper which maximize vibration isolation in the suspension system with virtual sky-hook dynamic damper, four cost functions were defined from frequency response function for dynamic wheel force and body vertical acceleration. Then numerical analysis was performed with the combination of them. The optimal parameters of dynamic damper from the analysis were applied to active and semi-active suspension system, and proved to be the most effective to ride comfort.
EURO-Ⅳ 대응 배기정화 시스템 설계 및 최적화 기술 개발
이천환(Chunhwan Lee),이춘범(Chunbeom Lee),김성중(Sungjoong kim),서동규(Dongkyu Seo),유영면(Yungmyun Yoo),이동인(Dongin Lee),한현식(Hyunsik Han) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Limited petroleum fuel and green house effect are increasing the necessity of CO₂ reduction policy of every country and high fuel efficiency automobile. The one way in the present is diesel fueled vehicle is applied to satisfy these requests. In case of diesel vehicles, there is a synergy more than 20% fuel efficiency compared with gasoline vehicles but particle material and nitrogen oxide emissions are remained to overcome.<br/> In this paper, diesel after-treatment and cooled EGR systems are evaluated and tested s that optimal technologies are developed for simultaneous PM/NOx reduction to meet the EURO-Ⅳ regulation. For the DePM, three different size hybrid DPF (DOC+catalyzed DPF) systems are used and for the DeNOx, cooled EGR (CEGR) system is used. At the results of evaluation and test on 3.3L EURO-Ⅱ diesel engine, the HDPF systems had 85-90% PM reduction rate ad CEGR systems are achieved to 30%-60% NOx reduction rate. <br/> From the results, if these technologies are applied to EURO-Ⅲ engine, the emission level will be estimated enough to satisfy the EURO- Ⅳ regulation.
샤시코너모듈 개발을 위한 부품의 내구 성능 예측에 대한 연구
최성진(Sungjin Choi),박정원(Jungwon Park),전광기(Kwangki Jeon),최규재(Gyoojae Choi),유영면(Yungmyun Yoo) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Chassis system has a large influence on ride quality, stability and NVH performance of a car. To improve the performance and reduce cost, the development of chassis modular assemblies is emphasized. To develop chassis comer modules, it is necessary to predict the performance of full vehicle motion such as ride, handling performance, NVH characteristics and durability of modules.<br/> In this paper, full vehicle simulations and tests are performed to acquire the design parameter of chassis comer module of passenger car. 3-axis simulator modeling are carried out to simulate reaction force analysis and fatigue analysis of new developed modules Also, real vehicle tests to validate performance of new developed modules are performed. We had developed the accelerated durability test procedure of KATECH PG and it is used to test chassis comer modules at laboratory and simulate durability performance.<br/> All these results have been provided to module and parts company and make an important role to develop chassis comer modules.<br/>
샤시코너모듈 개발을 위한 부품의 내고 성능 예측에 대한 연구
최성진(Sungjin Choi),박정원(Jungwon Park),전광기(Kwangki Jeon),최규재(Gyoojae Choi),유영면(Yungmyun Yoo) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Chassis system has a large influence on ride quality, stability and NVH performance of a car. To improve the performance and reduce cost, the development of chassis modular assemblies is emphasized. To develop chassis corner modules, it is necessary to predict the performance of full vehicle motion such as ride, handling performance, NVH characteristics and durability of modules.<br/> In this paper, full vehicle simulations and tests are performed to acquire the design parameter of chassis corner module of passenger car. 3-axis simulator modeling are carried out to simulate reaction force analysis and fatigue analysis of new developed modules. Also, real vehicle tests to validate performance of new developed modules are performed. We had developed the accelerated durability test procedure of KA TECH PG and it is used to test chassis corner modules at laboratory and simulate durability performance.<br/> All these results have been provided to module and parts company and make an important role to develop chassis corner modules.<br/>