BMW 3: Introduction
The electrical machine in the G20 PHEV is a permanently excited synchronous machine. It can convert electrical energy from the high-voltage battery unit into kinetic energy, by which the vehicle is driven.
Both electric driving up to approximately 87 mph (140 km/h) as well as support of the combustion engine are possible, for example when overtaking (boost function) or for active torque support when changing gears.
In the reverse situation, the electrical machine converts kinetic energy into electrical energy during braking and in coasting (overrun) mode and stores this in the high-voltage battery unit (energy recovery).
The electrical machine is a high-voltage component
High-voltage component warning sticker
Each high-voltage component has on its housing an identifying label that enables Service employees and vehicle users to identify intuitively the possible hazards that can result from the high electric voltages used.
Only Service employees who satisfy all the prerequisites are permitted to work on the designated high-voltage components: suitable qualifications, compliance with the safety rules, procedure following the exact repair instructions.
For high-voltage safety reasons, with the exception of the high-voltage battery unit no other high- voltage component must be opened.
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Safe working practices for working on a high-voltage system
The following description of the repair of the high-voltage components is
only a general list of the
content and the procedure. In general, only the specifications and instructions
in the current
va
Procedure after an accident
The safety concept of the high-voltage system ensures that, even during or
after an accident, there
is no danger to the customer, the rescue services or the service employee. The
high-voltage system
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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
protection of the components. It replaces the well-known antifreeze and
corrosion inhibitor Glysan
New schematic diagram
The representation of the individual bus systems and their designations have
been adapted to the
representation and the designation of the ISTA workshop information system.
The following table provides an overview of the previous and the current
representation and
designation:
Bus overview
G2
