BMW 3: Adapted control units
It was necessary to adapt the IHKA to enable activation of the electric A/C compressor (EKK) in all operating conditions. The electric A/C compressor control unit communicates with the IHKA via the LIN bus.
To be able to show additional displays for driving readiness, electric driving, brake energy regeneration and state of charge of the high-voltage battery unit which are relevant to the driver, the instrument cluster was adapted. In addition, the Check Control messages were enhanced with hybrid-specific messages.
The software of the Digital Engine Electronics (DME) was adapted due to the torque coordination of the electrical machine/combustion engine.
Rollover detection is required for the hybrid cars on a worldwide scale so that the high-voltage system is deactivated in the event of the car rolling over. Rollover detection is implemented with the help of the sensors integrated in the ACSM control unit (roll rate sensor and vertical acceleration sensor).
The ACSM had to be adapted with regard to the evaluation of these sensor signals. The safety battery terminal at the auxiliary battery is activated by the ACSM if required.
The software of the Dynamic Stability Control DSC was adapted for the regenerative braking. This includes reading the brake pedal angle sensor which is wired directly to the DSC control unit.
The EGS control unit was adapted due to the modified transmission. For instance the electric transmission oil pump is controlled by the EGS control unit.
The receiver audio module RAM also assumes the actuation of the VSG speakers.
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Overview
The driving and drive system modes are activated via the Driving Experience
Control. The separate
eDrive button, as known from the F30 PHEV, which can be used to shift through
the drive system
modes
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Malfunction
General information
A Check Control message is displayed.
Vehicle key recognition by the vehicle may malfunction
under the following circumstances:
The battery of the vehicle key is discharged.
Interference of the radio connection from
transmission towers or other equipment with
high transmitt
PostCrash - iBrake
Concept
In the event of an accident, the system can bring
the vehicle to a halt automatically without intervention
by the driver in certain situations. This
can reduce the risk of a further collision and the
consequences thereof.
At standstill
After coming to a halt, the brake is released automatica
