G - Physics – 05 – D
Patent
G - Physics
05
D
G05D 23/20 (2006.01) B60H 1/00 (2006.01) G05D 23/30 (2006.01)
Patent
CA 2044778
ABSTRACT OF THE DISCLOSURE 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 inlet pressure to the valve controlling flow of liquid to the heater core. The signals are summed; and, the valve servo driven until the sum is zero modulating the valve to maintain the sum at zero for regulating blower air discharge temperature at a constant level.
Borden Ladner Gervais Llp
Corporation Eaton
Torrence Robert J.
LandOfFree
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