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.
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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
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Overview
Buttons in the vehicle
Park assistance button
Panorama View
Cameras
Front camera
Rearview camera
One camera is located at the bottom of each exterior
mirror housing.
The image quality may be impaired by dirt on the
camera lenses. If required, clean the camera
lenses.
Switching on/off
Switchin
Replacing the battery
1. Remove the integrated key from the vehicle
key.
2. Place the integrated key underneath the battery
compartment cover, arrow 1, and lift the
cover with a lever movement of the
integrated key, arrow 2.
3. Push battery in the direction of the arrow using
a pointed object and lift it out.
4. Inser
