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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Using this Owner's Manual
Orientation
The fastest way to find information on a particular
topic is by using the index.
An initial overview of the vehicle is provided in
the first chapter.
Validity of the Owner's Manual
Production of the vehicle
At the time of production at the plant, the printed
Owner's Manual is the most c
Overview
With the G20 PHEV the already familiar Generation 4.0 high-voltage battery
unit with the designation
SP41 is used. The lithium-ion battery has the same basic design as the
Generation 3.0 SP06 high-
voltage battery unit. The same can be found in the G12 PHEV and also in the G30 PHEV.
The
