ME engine torque requests function - GF07.61-P-4013MIS

ENGINE 272.9 (except 272.974) in MODEL 221.0 /1 (except 221.095 /195) as of model year 2009/AEJ 08 

ENGINE 273.9 in MODEL 216.3, 221.0 /1 as of model year 2009/ 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 [ME] control unit (N3/10) coordinates and sets priorities for the requirements of all systems (according to driveability 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 electric controller unit (VGS) (Y3/8)
• 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

Function sequence for engine torque requests 

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

• Lengthening or shortening the injection time of 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.

	Electrical function schematic for engine torque requirements	Model 216		PE07.61-P-2783-97CAB
	Component description for ME-SFI [ME] control unit	N3/10	Engine 273	GF07.61-P-6000MLS