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

GF07.10-P-1013MMC Torque Coordination, Function
- ENGINES 157.9 in MODEL 216.3, 221.0 /1
- ENGINES 278.9 in MODEL 216.3, 221.0 /1

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 request is to be met.

The following systems can make an engine torque request:
- Driver, through the accelerator pedal sensor (B37)
- Electronic Stability Program (ESP), via the chassis CAN (CAN E) from the ESP control unit (N47-5)
- Cruise control, via the ESP control unit
- Transmission control, via the drive train CAN (CAN C) from the electric controller unit (VGS) (Y3/8)
- 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

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.