In this paper, a automatic transmission shift quality simulator is developed using MATLAB Simulink. The shift simulator is developed using the dynamic models of the automatic transmission with torque converter, and vehicle dynamics and the hydraulic control system, which consists of solenoid valve, pressure control valve, accumulator and actuator.

Abstract
 1. 서론
 2. 다단 자동변속기
 3. 변속성능 예측
 4. 결론
 References

• 김진구(Chungbuk provincial college) | Jin-Gu Kim
• 조대환(Mok-po maritime univ.) | Dae-Hwan Cho Corresponding Author
• 조태희(Mok-po maritime univ.) | Tae-hui Cho