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

GF07.10-P-1013MG Torque Coordination, Function
ENGINES 271.8 in MODEL 204.0 /2 /3, 207.3 /4, 212.0 /2

Function requirements for torque coordination, general points
^ Circuit 87 M ON (engine timing 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 Electronic Stability Program control unit (except code (233) DISTRONIC PLUS)
- DISTRONIC PLUS, via radar sensor control unit (N62/1) (model 207. 3/4 up to 31.5.11 with code (233) DISTRONIC PLUS, model 212 0/2 up to 31.5.10 with code (233) DISTRONIC PLUS or code (234) Blind spot assist)
- DISTRONIC PLUS or Active Blind Spot Assist, via the video and radar sensor system control unit (N62/2) (model 212.0/2 as of 01.06.10, model 204.0/2 and model 207.3/4 as of 01.06.11, model 204.3 with code (233) DISTRONIC PLUS, with code (237) Active Blind Spot Assist, with code (238) Active Lane Keeping Assist)
- Transmission control, via the drive train CAN (CAN C) from electronic transmission control control unit (N15/3) (for code (423) 5-speed automatic transmission (NAG)) or via the fully integrated transmission control controller unit (Y3/8) (for code (427) 7-speed automatic transmission)
- 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)

Up to 28.2.2011 or 31.5.2011 only the Electronic Stability Program control unit Basis variant will be used.

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)
- Combined adaptation of injection time and 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.