Temperature Sensing

IHKA E38 TEMPERATURE SENSING







The IHKA E38 control panel/module needs the same temperature inputs as earlier IHKA systems, but it does not get all of them from dedicated IHKA temperature sensors:

^ Ambient temperature - this is not provided by a dedicated IHKA sensor. On the E38, the ambient temperature sensor is located in the left front brake cooling duct, and supplies its signal to the IKE. The IKE then supplies ambient temperature information to any control modules requiring it over the K-Bus.
^ Evaporator temperature - this is provided by a dedicated IHKA sensor, inserted into the evaporator core through an opening on the left side of the housing assembly as on previous IHKA systems.
^ Heater core temperatures - these are provided by dedicated IHKA sensors, located in the IHKA housing rear cover as on earlier systems. On E38, though, the sensors are inserted in openings on top of the cover and they hang down, behind the heater cores.
^ Interior temperature - this is provided by a dedicated IHKA sensor, located inside the system control panel/module and, as on previous systems, it has a small fan motor.

The IHKA E38 system processes two additional temperature sensor inputs: left and right face vent temperatures. These are provided by face vent temperature sensors, located just behind the center face vent outlets.

The control panel/module uses the information they provide (along with left and right desired temperature settings and the temperature mixing thumbwheel input) to control the left and right mixing flaps.