| 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 (11a, 11b, 12, 13, 14) changes at least one passage opening of at least one flow path. A coupling housing (8, 8a, 8b) is connected to the driving member (9), and the actuator (14) is arranged within the coupling housing (8, 8a, 8b).
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