BMW 3: System overview

System overview of hybrid brake system
- Hydraulic braking
- Signal path
- Regenerative braking
- High-voltage battery unit
- Electric Motor Electronics (EME)
- Electric motor
- Drive train
- Digital Motor Electronics (DME)
- Wheel brakes
- Dynamic Stability Control (DSC)
- Brake pedal with brake pedal angle sensor and brake booster
- Accelerator pedal module
- Rectified high-voltage (DC) for storing in the high-voltage battery unit
- Electrical energy generated by the electrical machine (AC voltage)
- Bus message "Accelerator pedal angle" from the DME to the EME (energy
recovery in coasting overrun mode)
- Bus message "Braking torque setpoint" from the DSC to the EME
- Hydraulic pressure from the DSC to the wheel brakes
- Hydraulic pressure from the brake booster to the DSC
- Electrical signal "Brake pedal angle" from the brake pedal angle sensor
to the
DSC
- Operation of the brake pedal
- Electrical signal "Accelerator pedal angle" from accelerator pedal
module to
the DME (energy recovery in coasting overrun mode)
- Releasing the accelerator pedal
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G20 PHEV, hydraulic braking
The brake booster is operated via the driver's foot operation, and the brake
actuation is determined by
means of the brake pedal angle sensor.
Depending on the brak
The regenerative braking makes possible brake energy regeneration. The
electrical machine works
here as an alternator and brakes the gears via automatic transmission -
propeller shaft - re
Regenerative braking with help of the drivetrain only effects the rear axle.
The brake force on the rear
axle must not exceed a specific value in proportion to that on the front axle.
This would oth
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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
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