| 摘要 |
The drive is based on a pump (2) and reversible motor (3) in a hydraulic circuit (16) with gearing (21,22) and preferably a direct drive shaft (23) and clutch (24) to the input of the gearbox (4). An electronic control unit (5) responds to signals from sensors (25,26) of the gearbox input and output shafts (20,6). The displacement volume of the motor is adjusted (15) to zero and then increased until the ratio of the shaft speeds is shown to correspond to the selected higher or lower gear. |
