| 摘要 |
A combined viscous heater and viscous coupling fan drive operates on principles of viscous coupling to provide both, supplemental vehicle interior cabin heating, and rotation to a cooling fan mounted to a fan shaft. A viscous drive chamber and case surround a drive plate and a viscously driven plate. A liquid coolant chamber and case surrounds the viscous drive case that houses the plates for viscous coupling. Liquid coolant passes through the liquid coolant chamber as coolant circulates through the engine block. The coolant chamber has a coolant inlet and outlet. An electromagnetic clutch engages to turn a shaft and the driving plate which viscously couples to and turns the driven plate, which is connected to a shaft and engine cooling fan. The electromagnetic clutch and a fan brake are controlled to govern viscous heat generation by the plates and cooling fan operation.
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