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Home >> Mercedes Benz >> 2002 >> S55 >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Mixture Formation -- Basic Knowledge -- 215 & 220 Chassis - 2 Of 2 >> Basic Knowledge >> ME-SFI part load/full load operation function - GF07.61-P-3016 >> ME-SFI part load/full load operation - function - GF07.61-P-3016SM

ME-SFI part load/full load operation - function - GF07.61-P-3016SM

ENGINE 113.986 

ENGINE 113.987 

ENGINE 113.988 

ENGINE 113.989 

Fig 1: ME-SFI Part Load/Full Load Operation, Function - Engines 113.986/987/988/989
G04738342

Partial load operation: 

When the engine is at operating temperature, optimal exhaust emission values and low-cost fuel consumption are assured by the lambda control function.

Full load operation 

The conditions for a maximum engine torque are created when the throttle valve is fully open and there are short air intake ways (switching flap in intake manifold open). The injection time is extended accordingly for this purpose.

The respective quantity of fuel is metered to the engine in line with the map. At the accelerator pedal sensor, a slewing range of 10 up to 90% is defined as partial load and a slewing range of more than approx. 90% as full load.

The fuel quantity depends on:

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