Gasoline Injection And Ignition System With Direct Injection, Function - GF07.70-P-0002MRS
Engine 264.9 in Model 205, 253
Block diagram for networking the direct line
Block diagram for CAN-networking
Gasoline injection and ignition system with DI, general
In the electrical network with the sensors and actuators of Engine 264 DI (Direct Injection), the gasoline injection and ignition system with direct injection forms the Engine management system "MED 17.7.7".
The abbreviated designation MED 17.7.7 means:
M = Engine
E = Electronics
D = Direct injection
17.7.7 = version
The whole Engine management is contained in the ME-SFI [ME] control unit. Sensor data are read in directly by the Engine management and indirectly via the CAN network and the respective actuators are actuated. Here the individual functions and systems of the Engine management are controlled and coordinated by the ME-SFI [ME] control unit.
The Engine management is subdivided into the following systems:
- Basic functions
- Engine system
- Fuel injection system
- Ignition system
- Exhaust system
Basic functions
- Control unit diagnosis
- Control module programming
- Fault memory
- Diagnosis via CAN
- European On-Board Diagnosis
- CAN network
- Transport mode
- Variant coding
- DAS stage 4 (FBS 4)
- Torque coordination
- Heat management
- Alternator interface
- Maximum vehicle speed limit
Diagnosis:
For diagnostic purposes, the fault codes of the Engine management system can be read out and deleted and individual diagnostic functions can be specifically actuated.
CAN network:
The ME-SFI [ME] control unit exchanges data with other control units that are integrated in the CAN network via the connected drive train CAN and Engine CAN. The ME-SFI [ME] control unit also acts as an interface (Gateway) between the two CAN bus systems.
Control unit programming:
The Engine management in the ME-SFI [ME] control unit is programmable, i. e. the software of the control unit can be exchanged (replaced). The software required for control unit programming can be found on the diagnosis system software DVD.
Transport mode:
In transport mode various functions of the Engine management are limited. If the kilometer reading of the vehicle is more than 250 km, the "Transport mode" system status is deactivated automatically and cannot be reactivated again.
Variant coding:
The vehicle model, national version, exhaust gas variant, transmission version can, for example, be coded with the variant coding.
Engine system
- Throttle valve control
- Safety fuel shutoff
- Transmission overload protection
- Support for ESP®
- Fully integrated transmission control support
- Driving on torque limitation
- Fan operation
- Throttle valve calibration
- Boost pressure control (over wastegate)
- Regulated adjustment of the intake and exhaust camshaft
- CAMTRONIC valve lift adjustment
- Regulation of ECO start/stop function
Fuel injection system
- Cylinder-selective DI
- Gasoline high pressure regulation
- Start, post-start phase and acceleration enrichment
- Warm-up control
- Idle speed control
- Limp-home function
- RPM increase for an activated A/C
- Inertia fuel shutoff
- Fuel pump controlling (low fuel pressure)
- Altitude adaptation (integral pressure sensor in ME-SFI [ME] control unit)
- Load change function
- RPM limitation
Ignition system
- Multi-spark ignition
- Ignition map
- RPM limitation
- Knock sensor system
- Synchronization of camshaft and crankshaft position
Exhaust system
- Catalytic converter heating
- Oxygen sensor heater controlling
- Straight-line lambda control
Engine 264.9 in Model 205, 253 with code U16 (Exhaust system with acoustic flap)
Engine 264.9 in Model 205 with code U21 (AMG Performance exhaust system)
Exhaust flap
A movable exhaust gas flap is located in the tailpipe of the left rear muffler. The exhaust system's noise behavior is changed by releasing or constricting the tailpipe orifice area.
The exhaust gas flap is moved by the left exhaust flap actuator motor.
The left exhaust gas flap actuator motor is actuated by the powertrain control unit via the exhaust gas LIN.
| Crankcase ventilation system, function | GF01.20-P-0001MRS | ||
| Ignition, function | GF07.10-P-1023MRS | ||
| Starting, function | GF07.10-P-1001MRS | ||
| Fuel supply, function | GF07.10-P-1003MRS | ||
| Injection regulation, function | GF07.10-P-1004MRS | ||
| Ignition system function | GF07.10-P-1005MRS | ||
| Synchronize fuel injection and firing order function | GF07.10-P-1006MRS | ||
| Start, post-start phase and warm-up enrichment, function | GF07.10-P-1007MRS | ||
| RPM control, function | GF07.10-P-1008MRS | ||
| Alternator interface function | Engine 264.9 in Model 205 except code B01 (48V Technology) | GF07.10-P-1009MRS | |
| Lambda control, function | GF07.10-P-1010MRS | ||
| Smooth running control, function | GF07.10-P-1011MRS | ||
| Thermal management, function | GF07.10-P-1012MRS | ||
| Torque coordination, function | GF07.10-P-1013MRS | ||
| Overrun mode fuel shutoff, function | GF07.10-P-1014MRS | ||
| Knock control, function | GF07.10-P-1015MRS | ||
| Camshaft adjustment, function | GF07.10-P-1016MRS | ||
| Engine limp-home mode, function | GF07.10-P-1019MRS | ||
| European OBD, function | GF07.10-P-1021MRS | ||
| ECO start/stop function Engine management, function | GF07.10-P-1042MRS | ||
| Charging, function | GF09.00-P-2000MRS | ||
| Exhaust treatment function | GF14.00-P-3000MRS | ||
| Electronic accelerator function | GF30.20-P-3015MRS | ||
| On-board refueling vapor recovery function | Engine 264.9 in Model 205 with code 494 (US version) | GF47.10-P-3004MRS | |
| Purging function | GF47.30-P-3015MRS | ||
| Purging system with leak test function | Engine 264.9 in Model 205 with code 494 (US version) | GF47.30-P-3016MRS | |
| Overview of system components for gasoline injection and ignition system with direct injection | GF07.70-P-9998MRS |