Energy Management, Function - GF54.10-P-0003GR
MODEL 166 up to model year 2016
Function requirements, general
- Circuit 30 ON
Energy management, general
Energy management manages the provision (supply) and consumption (management) of electrical energy with the aim of ensuring the startability of the engine and a stable supply to all electrical consumers. For this purpose, the energy management monitors on-board power supply utilization and actively intervenes in the energy balance (e.g. consumer shutoff).
The following components are involved in energy management:
- Battery sensor (monitoring of on-board electrical system battery charge level (G1))
- On-board electrical system battery (power storage and supply when the engine is off)
- Additional battery (G1/7) (except CODE B03 (ECO start/stop function)) ("Shift by wire" power supply with engine OFF)
- ECO start/stop function additional battery (G1/13) (with CODE B03 (ECO start/stop function)) ("Shift by wire" power supply with engine OFF and on-board electrical system power supply for automatic engine start)
- Alternator (energy generation)
- CDI control unit (diesel engine) or ME-SFI [ME] control unit (gasoline engine) (alternator management)
- SAM control unit (energy management, control of on-board electrical system support (with CODE B03 (ECO start/stop function)))
Transport mode (as of 01.07.2012):
The transport mode is activated in the production plant at the end of the production process, and it sets the overall vehicle into a defined special condition.
With targeted interventions in individual electronics systems the following is achieved:
- Reduction of shipping damage and accidents
- Best-possible charging of on-board electrical system battery through optimized energy management
- Avoidance of damage to and contamination of the vehicle interior as well as theft of loose parts from the vehicle interior
- Discontinuation of transport protection seal
The transport mode remains active on its way from the production plant to the dealers and company-owned sales and service outlets around the world up to the so-called delivery inspection and the final handover to the end customers.
The transport mode is automatically deactivated from a total distance traveled of more than 350 km whereupon it cannot be activated again. Up to this limit, the transport mode can be deactivated using the diagnosis tester or key combinations at any give time and activated with the diagnosis tester again. The fault memory is not actively deleted when the key combination is used for deactivation. This means that the "Transport mode active" fault entry remains stored. This must be deleted using the diagnosis tester when the vehicle is inspected for the first time.
To support the processes in Sales and Logistics the vehicle's currently possible residual service life and, if necessary, appropriate care instructions for the on-board electrical system battery are shown on the multifunction display of the instrument cluster when the transport mode is active.
The energy management system's continuously determined condition of the on-board electrical system battery is rendered fully transparent at any given time without the use of any additional measuring instruments during the vehicle delivery period.
This display provides the operating personnel with specific instructions on what to do to guarantee a high delivery quality with regard to the on-board electrical system battery.
The individual transport mode functionalities are split up for numerous individual systems. The core here is the central control of the transport mode by the energy management system. According to the energy management specifications, targeted interventions (function restrictions or changes) are carried out in individual electronics systems.
The following function limits or modifications are implemented during the transport mode:
- Limitation of vehicle speed to v = 40 km/h
- Electric locking of front passenger and rear doors as well as liftgate
- Deactivation of roof opening function for vehicles with CODE 413 (Panoramic glass sunroof with top sliding sunroof) or CODE 414 (Electric glass tilting/sliding roof)
- Monitoring of circuit 15 at standstill and acoustic feedback, when the vehicle is at a standstill for t > 10 s with the ignition switched on and the engine switched off
- Optimized quiescent current management, when the vehicle is parked for an extended period (e.g. transportation by ship)
- Limit exterior light functions
- Implement display on instrument cluster
- Adjust fault memory handling
The following tasks are carried out by the energy management system:
- Set specific consumer shutoff stages
- Optimized charging of the on-board electrical system battery and additional battery:
- Activate fast battery charging
- Deactivate alternator management
- Deactivation of the engine start/stop function (with CODE B03 (ECO start/stop function))
- Early opening of no-load current switch
- Limit reasons for closing circuit 30g relay
Major assemblies coordinator
The major assembly coordinator is integrated into the CDI control unit or the ME-SFI control unit and forms the interface between the energy management system and the alternator. The CDI control unit or the ME-SFI [ME] control unit communicates with the alternator over the drivetrain LIN. The major assembly coordinator regulates the alternator's power output to match the energy management system specifications, taking engine load into consideration.
The recording and evaluation of the relevant variables for this are conducted by the following components:
- SAM control unit
- CDI control unit or ME-SFI [ME] control unit
- Alternator
Energy management contains the following subfunctions, which are described in separate documents:
- Engine on energy management, function
- Engine off energy management, function
- Energy management for ECO start/stop function (with CODE B03 (ECO start/stop function))
The "energy management for engine start/stop function" subfunction is viewed from an energy management point-of-view. Information on the subfunction "Engine timing, start/stop function" is documented in the function description "Common rail diesel injection (CDI), function" (diesel engine) or "Gasoline injection and ignition system with direct injection, function" (gasoline engine).
- DC/AC converter function (with CODE U80 (115V socket))
| Engine on energy management, function | GF54.10-P-1060GR | ||
| Engine off energy management, function | GF54.10-P-1050GR | ||
| ECO start/stop function energy management, function | MODEL 166 up to model year 2016 with CODE B03 (ECO start/stop function) |
GF54.10-P-1040GR | |
| DC/AC converter function | MODEL 166 up to model year 2016 with CODE U80 (115 V socket) |
GF54.10-P-2005GR |