Heating apparatus for vehicle

Details Heating apparatus for vehicle Heating apparatus for vehicle

1997-07-14

1998-10-06

Bennett, Henry A.

Heating systems

Heat and power plants

Vehicle

237 123B, 122 26, 126247, B60H 102

Patent

active

058164952

ABSTRACT:
In a heating apparatus according to the present invention, a water valve disposed between a viscous heater and a heater core is controlled by a servomotor to be interlocked with an air mixing damper. An opening degree of the water valve is calculated based on a target damper opening degree of the air mixing damper, and a flow amount of cooling water circulating into a cooling water passage is calculated based on the opening degree of the water valve. When the flow amount of the cooling water is smaller than the set flow amount, an electromagnetic coil of the viscous clutch is turned off. In this way, a rotational driving force is not transmitted from the engine to a shaft of the viscous heater to prevent viscous fluid from being heated abnormally.

REFERENCES:
patent: 4993377 (1991-02-01), Itakura

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