ME engine torque requests, function - GF07.61-P-4013MOS

ENGINE 275.953 in MODEL 216.376, 221.176 as of Model Year 09 /AEJ 08

ENGINE 275.982 in MODEL 216.379, 221.179 as of Model Year 09 /AEJ 08

Function requirements for engine torque requests, general points

Circuit 87M ON (engine control ON)
Engine running

Engine torque requests, general points

The torque interface in the ME-SFI 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 systems can make an engine torque request:

Driver, through the accelerator pedal sensor (B37)
Transmission control, from the ETC control unit (N15/3) Electronic Stability Program (ESP), through the ESP control unit (N47-5)
Cruise control, from the ESP control unit
Distronic PLUS, through the radar sensors control unit (SGR) (N62/1) (if Distronic PLUS is installed)
Maximum torque limitation
Maximum engine speed limitation
Maximum vehicle speed limit

Engine torque requests function sequence

According to the dynamic requirements, the ME-SFI control unit varies the engine torque requirement, by:

Lengthening or shortening the injection time of the injection valves (Y62)
Advance/retard adjustment of the ignition angle of the ECI ignition modules for the RH and LH cylinder banks (N92/1, N92/2) (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.

Electrical function schematic for engine torque requirements	Model 216	PE07.61-P-2783-97CAA
	Model 221	PE07.61-P-2783-97SAA
ME-SFI [ME] control unit, component description	N3/10	GF07.61-P-6000MOS