Hybrid System, Basic Function - GF08.30-P-9900A
Model all (CAR)
with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in))
Model all (CAR)
with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))
Model all (CAR)
with code ME10 (Hybrid vehicle)
The general operating principle of the hybrid system is explained in the following.
General
To generate the drive torque, one of the following is used:
- Only the combustion engine (conventional operating status),
- Only the electric machine (electric mode)
- The electric machine in combination with the combustion engine (hybrid mode).
In hybrid mode, the electric machine and combustion engine work together on the powertrain, which aggregates the torques of the individual drives.
The electric machine generates either an engine-generated torque or works as an alternator in recuperation.
The control of the hybrid system comprises the control of the combustion engines and the control of the power electronics control unit with the electric machine. The master control unit is thus the powertrain control unit, which contains the aggregate coordinator and thus coordinates all torques in the hybrid system. The top objective of the control is the lowest possible fuel consumption.
The energy management also takes place through the powertrain control unit.
The powertrain control unit determines the required output of the electric drive from the relevant vehicle data and requests this from the power electronics control unit. The power electronics control unit actuates the electric machine with 3-phase alternating voltage over the integrated power inverter and monitors the electric machine concerning its temperature and generated drive torque. The electric machine transfers the drive torque directly to the drive shaft.
The electric machine correlates the required energy during engine operation via the high-voltage on-board electrical system of the high-voltage battery. Charging of the high-voltage battery takes place while driving in overrun mode, when the electric machine works as an alternator. For plug-in hybrids, stationary charging is also possible by connecting an external power source.
To protect the electric drive from overheating, the power electronics control unit is cooled.
The driver receives information about the energy flow in the drivetrain and information about the charge level of the high-voltage battery via the multifunction display.
We will not go into further detail here about internal function sequences of the combustion engine, automatic transmission, regenerative brake system, 12 V on-board electrical system, and the high-voltage on-board electrical system.
During recuperative braking, the total braking torque requested by the driver is divided into one part of the braking torque to be implemented by the electric machine (recuperative) and one to be implemented by the service brake.
| Subsystems | |||
| Driving mode, basic function | Model 167 with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) |
GF08.00-P-1003B | |
| Model 177, 247 with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) Model 206, 223 with code ME10 (Hybrid vehicle) Model 213 as of model year 2021 with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) Model 213 as of model year 2021 with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) |
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| Overrun mode, basic function | Model 167 with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) |
GF08.00-P-1004B | |
| Model 177, 247 with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) Model 206, 223 with code ME10 (Hybrid vehicle) Model 213 as of model year 2021 with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) Model 213 as of model year 2021 with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) |
|||
| Hybrid system energy flow, basic function | Model 206, 223 with code ME10 (Hybrid vehicle) |
GF08.30-P-1006A | |
| Model all (CAR) with code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) except code ME10 (Hybrid vehicle) Model all (CAR) with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN)) except code ME10 (Hybrid vehicle) |
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| Hybrid system activation, basic function | GF08.30-P-1008A | ||
| Hybrid system deactivation, basic function | GF08.30-P-1009A | ||
| Hybrid system monitoring, basic function | GF08.30-P-1014A | ||
| Charge battery while driving, basic function | GF54.10-P-1002A | ||
| Stationary battery charging, basic function | GF54.10-P-1006A | ||
| High-voltage on-board electrical system, basic function | GF54.10-P-1016A |