ME-SFI acceleration enrichment, function - GF07.61-P-3015V

ENGINE 272.920 in MODEL 203 up to Model Year 8

ENGINE 272.922 in MODEL 211

ENGINE 272.940 in MODEL 203 up to Model Year 8

ENGINE 272.941 in MODEL 203 up to Model Year 8

ENGINE 272.942 in MODEL 171 up to Model Year 8

ENGINE 272.943 in MODEL 211, 219

ENGINE 272.944 in MODEL 211

ENGINE 272.945 in MODEL 251 up to Model Year 8

ENGINE 272.946 in MODEL 221 up to Model Year 8

ENGINE 272.960 in MODEL 203 up to Model Year 8

ENGINE 272.963 in MODEL 171 up to Model Year 8

ENGINE 272.964 in MODEL 211, 219

ENGINE 272.965 in MODEL 221 up to Model Year 8

ENGINE 272.966 in MODEL 230 up to Model Year 8

ENGINE 272.967 in MODEL 164, 251 up to Model Year 8

ENGINE 272.970 in MODEL 203 up to Model Year 8

ENGINE 272.972 in MODEL 211

ENGINE 272.975 in MODEL 221 up to Model Year 8

ENGINE 273.922 in MODEL 221 up to Model Year 8

ENGINE 273.923 in MODEL 164 up to Model Year 8

ENGINE 273.924 in MODEL 221 up to Model Year 8

ENGINE 273.960 in MODEL 211, 219

ENGINE 273.961 in MODEL 216, 221 up to Model Year 8

ENGINE 273.962 in MODEL 211

ENGINE 273.963 in MODEL 164, 251 up to Model Year 8

ENGINE 273.965 in MODEL 230 up to Model Year 8

ENGINE 273.967 in MODEL 209

ENGINE 273.968 in MODEL 221 up to Model Year 8

ENGINE 272.940 in MODEL 209

ENGINE 272.960 in MODEL 209

Fig 1: ME-SFI Acceleration Enrichment Function Diagram

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Dynamic enrichment prevents jerking when accelerating.

If the throttle valve is opened quickly, a short-term mixed adaptation takes place. An additional quantity of fuel is added to the engine by the ME control unit in line with the performance map. The ignition angle is adjusted to "Early".

Fuel pressure fluctuations at the injection valves are prevented by the fuel distribution pipe by both the fuel pressure reservoir and the particular volume.

Acceleration enrichment is dependent on:

Coolant temperature
Load change rate (accelerator rate)
Engine speed
Engine load
Intake manifold length and tumble flap position
Camshaft position
Correction programming with STAR DIAGNOSIS

ME-SFI [ME] control unit, component description	GF07.61-P-6000V
Coolant temperature sensor, component description	GF07.04-P-6040V
Camshaft Hall sensor, component description	GF07.04-P-6020V
Crankshaft Hall sensor, component description	GF07.04-P-6220V
Variable intake manifold switchover valve, component description	GF09.20-P-6001V
Intake manifold tumble flap, switchover valve component description	GF07.05-P-6030V
Hot film MAF sensor, component description	GF07.07-P-6000V
Accelerator pedal sensor, component description	GF30.20-P-2010V
Throttle valve actuator, component description	GF30.20-P-2020V
Fuel injection valves, component description	GF07.03-P-6010V
Fuel distribution rail, component description	GF07.61-P-6020V
Correction programming, function	GF07.61-P-3031V