| 摘要 |
A controllable drive ( 1 ) suitable for a motor vehicle coolant pump ( 2 ) comprises a rotatably mounted shaft ( 5 ), a driven member ( 7 ) which is rotationally fixedly mounted on the shaft ( 5 ), a driving member ( 9 ) which is mounted so as to be rotatable relative to the shaft ( 5 ), and a coupling region ( 7/8 ) which is arranged between the driving and driven members ( 9, 7 ) and holds a viscous fluid. At least one first flow path and at least one second flow path connect a fluid reservoir to the coupling region ( 7/8 ), and an actuation device ( 11 a , 11 b , 12, 13, 14 ) changes at least one passage opening of at least one flow path. A coupling housing ( 8, 8 a , 8 b) is connected to the driving member ( 9 ), and the actuator ( 14 ) is arranged within the coupling housing ( 8, 8 a , 8 b).
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