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

GF07.10-P-1013MI Torque Coordination, Function
- as of model year 09

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

Torque coordination, general points
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 requirement is to be implemented.

The following can set an engine torque requirement:
- 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) or Electronic Stability Program Premium control unit (N30/7) (for DISTRONIC PLUS)
- Cruise control, via ESP control unit (except DISTRONIC PLUS)
- DISTRONIC PLUS, via the chassis CAN from the radar sensors control unit (N62/1) (for DISTRONIC PLUS)
- Transmission control, via the drive train CAN (CAN C) from the fully integrated transmission control controller unit (Y3/8) (for an automatic transmission)
- Maximum engine speed limitation
- Maximum vehicle speed limit
- Maximum torque limitation

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 at the injection valves (Y62)
- 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.