자동변속기 클러치 자동보정 알고리즘 개발

다국어 초록 (Multilingual Abstract)

As a shift control of automatic transmission was managed with electronic control unit(ECU), shift quality which is a measure of shift shock during gear change has been improved considerably. However initial clutch pressure control for the clutch filling phase should rely on the predetermined control input since the input and output speeds are not changed until shifting process reaches to inertia phase. It is critical to minimize the clutch response time and control the clutch pressure accurately at the end of clutch fill in order to realize quick shift response and smoothness. Advanced transmission companies already adopted an auto calibration methods which establishes the databases for clutch piston fill-up attributes and frictional characteristics of disks. In this research, a distinctive auto calibration algorithm for forklift transmission that is under development is proposed and verified with the real-vehicle test. Experimental calibration results showed consistent turbine dynamics at the initial stage of shifts with properly calibrated clutch-fill control parameters. By using this technique, it is necessary to finalize the shift control for various operation conditions.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 클러치 작동특성
• 3. 선진사 자동보정기법 분석
• 4. 변속기 구조
• 5. 자동보정 알고리즘
• 6. 성능시험
• 7. 결론
• 참고문헌