自動車の自動変速機における二自由度スリップ回転速度制御系の設計 その2

抄録

Most automatic transmission systems are equipped with a lock-up clutch to improve efficiency. However, the use of lock-up in the low-speed range was greatly influenced by unmodeled dynamics and disturbances. In order to suppress such uncertainties, slip control of the lock-up clutch is needed. This paper first explains the modeling of the lock-up clutch as a low-order system within the range of slip control. It then describes a slip control system designed by using a robust control method, which takes into account variations in dynamic characteristics of components. Finally, the results of driving tests are presented to demonstrate the effectiveness of the slip control system.