Compensating for water pump speed variations in a tempered air s

Details Compensating for water pump speed variations in a tempered air s Compensating for water pump speed variations in a tempered air s

1990-02-14

1990-12-04

Ford, John

Heat exchange

Regenerator

Checker brick structure

165 39, 165 40, 165 42, 165 43, 237 2A, 237 123B, 417293, F25B 2900, G05D 2300

Patent

active

049746642

ABSTRACT:
An automatic control system for regulating the temperature of blower air discharged over a heater core to a vehicle passenger compartment. A thermistor is disposed to sense discharge air adjacent the heater core and provide a temperature signal. An electrical indication is provided of the condition of a servomotor driven valve controlling water flow to the heater core. An electrical reference signal is provided indicative of a user selected relative change of flow discharge air temperature. A signal is provided indicating the speed of the water pump circulating liquid to the heater core. The signals are summed and the valve sums driven until the sum is zero and the valve modulated to maintain the sum at zero for regulating blower air discharge temperature constant.

REFERENCES:
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patent: 3032324 (1962-05-01), Fiala
patent: 3122199 (1964-02-01), Byloff
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patent: 4189093 (1980-02-01), Schnaibel et al.
patent: 4373666 (1983-02-01), Williams
patent: 4417688 (1983-11-01), Schnaibel et al.
patent: 4462541 (1984-07-01), Hansen
patent: 4482092 (1984-11-01), Biber et al.

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