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
h1 {color: red;}
h2 {color: green;}
h3 {color: blue;}
h4 {color: #FF00FF;}
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Engine housing, Crankshaft drive
Engine housing
Cylinder head
The cylinder head is made of aluminum.
Only slight modifications have been made to the B46TU head compared to the B46.
Cylinder head
Crankshaft drive
Crankshaft
Comparison B46 crankshaft with B46TU crankshaft
The crankshaft of the B46TU engine have been revised. Materi
Operating concept
Concept
iDrive includes a large number of functions.
These functions can be operated via the Controller
and, depending on the equipment version, via
touchscreen, voice activation system or gesture
control.
Safety information
Warning
Operating the integrated information systems
and communication de
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