무단변속기에 의한 FTP-75 모드 연비 기여도 및 개선효과 분석

A study of AT(auto-transmission) is continuing to improve the fuel economy and powertrain performance with multistage technology in a lot of car companies. But an AT has a problem with stage limit. So a research of CVT(continuously variable transmission) which can drive on the ideal driving condition is going on until nowadays. Further more among these researches, an fuel economy improvement effect analysis is needed when an AT is replaced a CVT, Although a lot of time and money is required in this study simulation can reduce them. In this paper, we analyzed the fuel economy improvement effect when CVT installed on a gasoline vehicle instead of an AT. For this study, we took a FTP-75 mode on chassis dynamometer and analyzed the energy flow down in the CVT vehicle. And we composed modeling and did the simulation by AVL CRUISE based on the results of CVT vehicle analysis data. As a results, it could be accomplished 7.5% improvement of fuel economy when CVT replaced an AT.