S07.10-0010-79
Block diagram |
A1/1 | Instrument cluster (KI) control unit | CAN HMI | User interface CAN | |
B37/4 | Accelerator pedal module | CAN V | Vehicle CAN | |
N3/34 | ME-SFI [ME] control unit | A | Mercedes-Benz | |
N30/4 | Electronic Stability Program (ESP) control unit | B | Nissan | |
N93 | Central gateway (CGW) | C | Default | |
T1 | Ignition coils | D | Optional | |
Y62 | Fuel injectors |
Function requirements for torque coordination, general points
Circuit 87 ON (engine management ON)
Engine running.
Torque coordination, general
The ME-SFI control unit coordinates the requests from all systems that issue a torque request. It also determines how dynamically each request is to be implemented.
Sources of a torque request:
Driver, via the accelerator pedal module
Cruise control (with CODE MS1 (Cruise control))
Electronic Stability Program (ESP®)
Rpm limitation
Maximum vehicle speed limit
Torque limitation
Function sequence for torque coordination
The ME-SFI [ME] control unit varies the engine torque requirement according to the dynamic requirements by:
Extending or shortening the injection duration of the fuel injectors
Advancing or retarding the ignition angle of the ignition coils
Combined adaptation of the injection and change of the timing
A torque reserve is achieved by simultaneously extending the injection duration and changing the timing to "late". This will enrich the fuel-air mixture, while at the same time preventing a premature torque increase due to the retarding of the timing.
Subsequently, the torque is increased as required by advancing the timing. This enables a fast and comfortable increase in torque.