Dry CVT(Continuously variable transmission) consists of a driving pulley and a driven pulley joined by rubber V-belt. Each pulley consists of a fixed flange and a movable flange. The movable flange of the driving pulley has the centrifugal roller and a ramp plate in the flange. The movable flange moves toward a fixed flange under the actuation of a centrifugal roller, as the driving pulley speed increases. The main advantages of the Dry CVT with V-belt, which has been popular in Asia, are a simple mechanism, less maintenance and low cost. The important claim which have an influence on the performance of the Dry CVT is the wear of the centrifugal roller. In this study proposed an improved design of driving pulley reducing the wear of the centrifugal roller in order to provide some design guidelines.

Abstract
 1. 서론
 2. 기초 이론
 3. 롤러마모 해석
  3.1 이론적 해석
  3.2 가동플랜지의 프로파일 변화
  3.3 램프 플레이트 경사각 변화
 4. 결론
 후기
 참고문헌

• 권영웅(서일대학 자동차과) | Y. W. Kwon
• 기시우(국민대학교 자동차공학 전문대학원) | S. W. Ki