Section 13 (Automatic A/C-Heater Systems): Description
The A/C-heater system automatically adjusts passenger compartment temperatures via control unit integrated with A/C-heater control panel. See Fig 1 . A/C-heater control unit regulates heater operation through an electromagnetic water valve. The electromagnetic water valve controls flow rate through heater core.
Air temperature is regulated by mixing varying ratios of cold and heated air through a temperature mixing flap. Temperature and air distribution for driver-side and front passenger-side can be controlled separately. All outlets can supply heated, cooled or fresh air according to temperature setting. See Fig 1 .
System uses 5 input sensors: interior temperature sensor, exterior temperature sensor, left heater core temperature sensor, right heater core temperature sensor, and evaporator temperature sensor. Temperature sensors continuously input information to A/C-heater control unit. A/C-heater control unit processes sensor signals and adjusts system temperature accordingly.