Control of coolant flow rate for vehicle heating

Heating systems – Heat and power plants – Vehicle

Reexamination Certificate

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Details

C237S005000, C237S01230R, C165S202000, C165S244000

Reexamination Certificate

active

07735744

ABSTRACT:
A method and apparatus for automatically adjusting the flow rate of engine coolant through a heater core in an automobile by automatically determining a temperature difference between the temperature of coolant at a first flow rate before it enters a heater core and a temperature of air exiting the heater core and automatically increasing the flow rate of the coolant to a second flow rate higher than the first flow rate if the temperature difference is greater than a first predetermined temperature difference.

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U.S. Appl. No. 10/373,202, filed Feb. 26, 2003, Eisenhour.
R. Eisenhour et al., “HVAC System Analysis Method for Testing”, SAE Technical Paper Series 960684, Feb. 26-29, 1996, pp. 7-13.

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