BMW 3: 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 coolant duct between the stator support and the housing of the automatic transmission. The coolant duct is sealed at the front and back with two sealing rings.
The rotor is also cooled by transmission oil, which absorbs heat energy in the form of oil mist and dissipates it to the ambient air at the transmission oil cooler.
G20 PHEV, cooling of the electrical machine
- Transmission oil cooler
- Electric motor
- Connection of transmission oil lines (for cooling the electrical machine)
- Automatic transmission
- Connection of transmission oil lines (for cooling the automatic transmission)
- Transmission oil thermostat
- Automatic transmission housing
- Transmission oil duct electrical machine
- Stator support
Service information
The lid in front of the electrical machine cannot be opened in Service. All work at the electrical machine, the additional torsional vibration damper, the separation clutch, as well as at the rotor position sensor itself, is prohibited. In the event of a fault with one of these components, the entire automatic transmission must be replaced.
Before removing the automatic transmission, the electrical safety rules must be applied.
After replacement of the automatic transmission or the Electrical Machine Electronics, the rotor position sensor must be adjusted with help of the diagnosis system.
The dual-mass flywheel can be replaced separately. Always proceed in accordance with the current repair instructions.
READ NEXT:
Introduction
The Electrical Machine Electronics (EME) is primarily used as control
electronics for the electrical
machine. It is also responsible for converting the direct current voltage from
the high-voltage b
Connections
The connections at the Electrical Machine Electronics can be divided into
four categories:
Low-voltage connections
High-voltage connections
Connection for potential compensation line
Connections
SEE MORE:
What must be observed when charging the high-voltage battery unit?
It is not permitted to simultaneously charge the high-voltage battery
unit and fill the fuel tank
When the charging cable is connected, do not fill the fuel tank and keep a safe
distance from highly
flammable materials. Otherwise, in the event of an improper connection or if the
charging cable
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-
