GF07.10-P-1013MM Torque Coordination, Function

GF07.10-P-1013MM Torque Coordination, Function
ENGINES 276.9 in MODEL 204.0 /2 /3 /9, 207.3 /4, 212.0 /2, 218

Function requirements for torque coordination, general points
^ Circuit 87M ON (engine control ON)
^ Engine running

Torque coordination, general
The torque interface in the ME-SFI [ME] control unit (N3/10) coordinates and sets priorities for the requirements of all systems (according to drivability and priority setting), which determine engine torque requirement. It also determines how dynamically each request is to be met.

The following systems can make an engine torque request:

- The driver, through the accelerator pedal sensor (B37)
- Electronic Stability Program (ESP), via the chassis CAN (CAN E) from the Electronic Stability Program control unit (N30/4) (except code (233) DISTRONIC PLUS) or Electronic Stability Program Premium control unit (N30/7) (for code (233) DISTRONIC PLUS)
- CC, over the ESP control unit (except code (233) DISTRONIC PLUS)
- Transmission control via drive CAN (CAN C) from fully integrated transmission control unit (Y3/8)
- DISTRONIC PLUS, over the chassis CAN by the video and radar sensor system control unit (N62/2) (for code (233) DISTRONIC PLUS, for code (237) Active Blind Spot Assist for code (238) Active Lane Keeping Assist)
- Maximum engine speed limitation
- Maximum vehicle speed limit
- Maximum torque limitation

The Electronic Stability Program control unit (N30/4) will be introduced into service as of 1.3.2011 (model 204.0/2) or as of 1.6.2011 (model 204.3) in 2 variants:
- Electronic Stability Program control unit, basis variant (except code (233) DISTRONIC PLUS)
- Electronic Stability Program control unit, Premium variant (except code (233) DISTRONIC PLUS)

From 1.6.2011 only the basic variant of the Electronic Stability Program control unit will be used in model 204.9.

Function sequence for torque coordination
According to the dynamic requirements, the ME-SFI [ME] control unit varies the engine torque requirement, by:

- Extending or shortening the injection time of the fuel injectors (Y76)
- Advance or retard adjustment of the ignition angle of the ignition coils (T1) (this allows very rapid variation of the engine torque)
- A combination of adaptation of the injection time and adjustment of the ignition angle

Torque reserve
If the injection time is increased and the ignition angle is retarded at the same time, the engine torque remains the same at first.
However, the engine torque can then be raised very quickly by advancing the ignition angle.