Air-conditioning ECU
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The electronic control is connected to the sensors and actuators by a multi-plug, and through wiring to the main vehicle wiring harness.
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Ambient air temperature sensor
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The cabin air temperature is continually measured by the cabin air temperature sensor. When the cabin air temperature has been changed to be within 2°C or 35°F of the desired selection, the fan speed is gradually reduced.
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Servo motors
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Vacuum servos consist of a sealed housing divided by a flexible diaphragm. The diaphragm seals the housing into two separate chambers.
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Electric servo motors
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Electrical servos incorporate limit switches to open circuit the current supply to the motor when the maximum travel of the flap or tap has been reached.
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Automatic climate control sensors
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Most temperature sensors used in climate control systems are thermistors which are solid state electronic devices that change their electrical resistance in response to temperature changes.
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Evaporator temperature sensor
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The evaporator temperature sensor is located in the air stream where the air leaves the evaporator and signals to the control unit the temperature of the air.
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Blower speed control
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This controls the speed of the fan in the heating and air-conditioning system in the passenger cabin.
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| Ventilation systems |
A ventilation system is fitted to vehicles to make the environment in the cabin comfortable for its occupants. |
