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Electronic accelerator function - GF30.20-P-3015MM

ENGINE 276.9 in MODEL 204 

ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014 

Function requirements for the electronic accelerator, general points 

Electronic accelerator, general points 

The electronic accelerator (EA [EFP]) function is integrated into the ME-SFI [ME] control unit (N3/10) and controls the opening angle of the throttle valve depending upon the driver input and the operating conditions.

The ME-SFI [ME] control unit regulates the throttle valve position according to the following sensors and signals:

The requirements of the torque coordination function are also taken into account.

Function sequence for electronic accelerator 

The function sequence is described in the following steps:

Function sequence for engine torque specification 

The ME-SFI [ME] control unit controls the engine torque dependent on a performance map dependent on the accelerator pedal sensor. To do this the ME-SFI [ME] control unit controls the actuator motor (M16/6m1) in the throttle valve actuator (M16/6) by means of a pulse width modulated signal (PWM signal), the effectiveness of the ignition angle over the ignition timing of the ignition coils (T1) and spark plugs (R4), the fuel mass/lambda value over the fuel injectors (Y76). The engine torque is then only determined by the accelerator pedal position if no limited or increased torque requests from other functions or control units (e.g. cruise control request) are active. The actual value potentiometers 1 and 2 (M16/6r1, M16/6r2) report the current throttle valve position to the ME-SFI [ME] control unit.

IMPORTANT The position feedback of the throttle valve actuator takes place by means of a contact-less angular sensor.

Function sequence for drivability functions 

The drivability functions and throttle change damping have the task of limiting the change of engine torque as a result of a rapid movement of the accelerator pedal. The limitation serves to improve the ride comfort since jolting in the drive train is prevented.

The drivability functions and the throttle change damping takes place on the basis of the following sensors and signals:

Function sequence for reverse travel 

If the fully integrated transmission control controller unit transmits the CAN signal "reverse travel" via the drive train CAN, the engine torque is limited to about 50% by the ME-SFI [ME] control unit. This optimizes ride comfort and driving safety when reversing.

Function sequence for adaptive accelerator pedal 

The ME-SFI [ME] control unit changes the actuation characteristics of the accelerator pedal depending on the vehicle speed calculated from the wheel speed. At higher vehicle speeds a somewhat steeper accelerator pedal curve is used in order to improve the response time (reduction of the free travel).

IMPORTANT Further functions which support the electronic accelerator and which are described are:

Electrical function schematic for electronic accelerator MODEL 204 PE30.20-P-2050-97FAK
MODEL 207 PE30.20-P-2050-97EAH
MODEL 212 PE30.20-P-2050-97DAI
Model 218 PE30.20-P-2050-97XAB
Overview of system components for gasoline injection and ignition system with direct injection ENGINE 276.9 in MODEL 204 ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 up to model year 2014 GF07.70-P-9998MM
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