| 摘要 |
<p>heater core (28) to a vehicle passenger compartment. A thermistor (58) 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 (24) controlling water flow to the heater core (28). 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 (28). The signals are summed; and, the valve servo driven until the sum is zero modulating the valve (24) to maintain the sum at zero for regulating blower air discharge temperature at a constant level. <IMAGE></p> |
