BMW 3: Operating principle
BMW 3 Series G20 (2018-2026) Training manual / Electrical Heating / Operating principle
If the driver adjusts a desired temperature at the IHKA controls, the IHKA calculates a corresponding nominal temperature and compares it to the actual output temperature of the electrical heating.
There is a coolant temperature sensor at the electrical heating output for this purpose. This way the IHKA control unit can decide whether the heat from the combustion engine is sufficient to heat the passenger compartment or whether the electrical heating should be switched on. If the temperature of the coolant is too low, the electric heating can heat up to a total of 6 stages. The electrical heating is always condition-based thanks to this control operation.
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Low coolant temperature
When the coolant temperature is low, for example after driving off, or in
all-electric driving, the electric
changeover valve is activated by the Body Domain Controller (BDC). The
electrical changeo
Antifreeze and corrosion inhibitor
The cooling system of the G20 PHEV is filled with the new antifreeze and
corrosion inhibitor Frostox
HT-12. The new antifreeze and corrosion inhibitor increases the long-term
stability and corrosion
B46TU-B48TU Engines
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h2 {color: green;}
h3 {color: blue;}
h4 {color: #FF00FF;}
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Text recognition/dictation
function
General information
The offering depends on the equipment version
of the vehicle and the country-specific variant.
Concept
Spoken words are detected by voice recognition
and converted into text. The text can be corrected
and supplemented as required. The text can be used as subject or content of
e-
Cooling
To guarantee the thermal operating safety of the electrical machine in every
situation, it is cooled with
coolant in the G20 PHEV. For this, the electrical machine is integrated in the
coolant circuit of the
transmission.
To cool the stator coils, the transmission oil is directed through a c
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