| 摘要 |
The invention relates to a device for driving a coolant pump ( 2 ) for the coolant circuit of an internal combustion engine in a motor vehicle comprising a drive train that encompasses a drive wheel ( 7 ), a viscous coupling ( 11 ), and a drive shaft ( 3 ). The inventive driving device is provided with a second coupling ( 15 ) which is embodied as a clutch and can be connected to the drive train parallel to the viscous coupling ( 11 ), resulting in increased redundancy and two-step rev control.
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