The conventional shifting map is developed to enhance the driving performance and fuel economy. According to the driver’s pedaling of accelerator, TCU controls gear ratio in view point of economy or driving performance. In this paper, various reverse engineering is applied to the driving test results of heavy duty AMT vehicle. With the test results, the performance of propulsion source is estimated and basic performance of vehicle is analized. Also the method to derive the shifting schedule according to power or fuel efficient, is developed and compared with the actual shifting map, and various shifting states is estimated. The developed numerical analysis model will be a stepping stone for the shift pattern development and various shift control research

Abstract
 1. 서론
 2. 시스템 분석
  2.1 파워모드
  2.2 연비모드
 3. 실차 시험 및 성능 분석
  3.1 시험 조건 및 실차 시험 결과
  3.2 실차 시험을 통한 구동원 성능 추정
  3.3 실차 시험을 통한 변속맵 분석
 4. 차량의 기본 성능 분석 및 변속맵 비교
  4.1 부하계와 차량계의 성능 분석
  4.2 변속 시점 분석
  4.3 수치해석 모델 개발
 5. 결론
 후기
 References

• 김남웅(서울과학기술대학교 일반대학원 자동차공학과) | N. W. Kim
• 박성천(여주대학교 자동차과) | S. C. Park
• 임원식(서울과학기술대학교 기계·자동차공학과) | W. S. Lim Corresponding Author