GF07.61-P-0001MOS Motor Electronics (ME-SFI) Gasoline Injection and Ignition System, Function

GF07.61-P-0001MOS Motor Electronics (ME-SFI) Gasoline Injection And Ignition System, Function
- as of model year 09


Gasoline injection and ignition system ME-SFI, general
The ME-SFI gasoline injection and ignition system is supplied by "Robert Bosch GmbH" and is connected electrically with the sensors and actuators of engine 275 KE ( Kanal-Einspritzung (port injection)) to form the "ME 2.7.2" engine control.

The abbreviated designation "ME 2.7.2" means:
M = Motronic
E = Electronic accelerator pedal
2.7.2 = Version 2.7.2

The whole engine control is located in the ME-SFI [ME] control unit (N3/10), which is subdivided in the following systems:
^ Basic functions
^ Engine system
^ Injection system
^ Ignition system
^ Exhaust system

Sensor data is directly read in from the engine control and indirectly via the CAN interconnection and actuates the respective actors. The following functions and systems are controlled and coordinated:

Basic functions
- Control system diagnosis
- Fault memory
- On-board diagnosis II (OBD II)
- Diagnosis via CAN
- CAN interconnection
- Flash programming
- Variant coding
- Drive authorization system 3 (DAS 3)
- Torque interface
- Heat management
- Alternator interface
- Maximum speed limitation

Diagnosis
For diagnostic purposes, the Diagnosis Assistance System (DAS) can be used to read out and delete the engine control fault codes, and to run specific diagnostic functions.

CAN interconnection
Over the connected drive train CAN (CAN C) and chassis CAN (CAN E), the ME-SFI control unit exchanges data with the other control units integrated in the CAN network.
The ME-SFI control unit also acts as the interface (gateway) between the two CAN bus systems.

Flash programming
The engine control in the ME-SFI [ME] control unit is flash programmable, that is the complete software in the control unit can be replaced using the DAS (installed new). The software required to program the control units is provided on the STAR DIAGNOSIS DAS Update DVD.

Variant coding
Using variant coding the following vehicle versions and equipment can be coded using the DAS:
- Vehicle model
- National version
- Exhaust variants
- Transmission version
- With or without catalytic converter

Engine system
- Start relay actuation
- Throttle flap control
- Safety fuel shutoff
- Transmission overload protection
- Secondary air injection
- Support for Electronic Stability Program (ESP)
- Support for Electronic Transmission Control (ETC)
- Starting torque limitation
- Suction fan actuation
- Calibration of throttle valve
- Boost pressure control (wastegate)

Injection system
- Cylinder-sequential port injection
- Start, post-start phase and acceleration enrichment
- Warm running regulation
- Idle speed control
- Cylinder-sequential fuel metering
- Emergency mode function
- RPM increase of air conditioning
- Inertia fuel shutoff
- Fuel pump control
- Altitude adaptation
- Load change function
- Rpm limitation

ECI ignition system (Energy Controlled Ignition)
- Twin-spark ignition
- AC voltage ignition with ionic current detection
- Ignition map
- Adaptive ignition timing correction
- Automatic RON correction ( Research Octane umber) N
- Rpm limitation
- Knock sensor system
- Synchronization of camshaft and crankshaft positions

Exhaust system
- Catalytic converter heating
- Oxygen sensor heater control unit
- Straight-line lambda control

The operating conditions of the engine and the active partial functions of the engine control is described in the following documents:
^ ME-SFI ignition ON function
^ ME-SFI starting function
^ ME-SFI idle function
^ ME-SFI driving mode function
^ ME-SFI ignition OFF function