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ME-SFI acceleration enrichment function - GF07.61-P-3015AM

ENGINE 113.990 in MODEL 211, 219 

ENGINE 113.991 in MODEL 215, 220 

ENGINE 113.992 in MODEL 230 up to Model Year 2008 

ENGINE 113.993 in MODEL 463 up to 31.5.12 

ENGINE 113.995 in MODEL 230 up to Model Year 2008 

Fig 1: Identifying ME-SFI Acceleration Enrichment Function Diagram
G07870946Courtesy of MERCEDES-BENZ USA

Dynamic enrichment prevents jerking when accelerating.

During fast opening of the throttle valve the mixture leans out briefly and is enriched briefly during fast closing of the throttle valve. This results in brief mixture adaptation in which an additional or a reduced quantity of fuel is allocated to the engine by the ME-SFI [ME] control unit depending on the performance map.

Acceleration enrichment is dependent on:

  Fuel injection valve - location/task/design/function   GF07.03-P-5004KE
  Crankshaft position sensor - location/task/design/function   GF07.04-P-4116AM
  Pressure sensor - location/task/design/function   GF07.04-P-5014AM
  Coolant temperature sensor - location/task/design/function   GF07.04-P-5026AM
  Charge air temperature sensor - location/task/design/function   GF07.04-P-5039AM
  ME-SFI control unit - location/task/design/function   GF07.61-P-5000AM
  Accelerator pedal sensor - location/task/design/function   GF30.20-P-4010HA
  Throttle valve actuator - location/task/design/function   GF30.22-P-4101AM