ME-SFI lambda control, function - GF07.61-P-4022V
ENGINES 272.920 in MODEL 203 up to model year 2008 /AEJ 07
ENGINES 272.922 in MODEL 211
ENGINES 272.940 in MODEL 203 up to model year 2008 /AEJ 07
ENGINES 272.941 in MODEL 203 up to model year 2008 /AEJ 07
ENGINES 272.942 in MODEL 171 up to model year 2008 /AEJ 07
ENGINES 272.943 in MODEL 211, 219
ENGINES 272.944 in MODEL 211
ENGINES 272.945 in MODEL 251 up to model year 2008 /AEJ 07
ENGINES 272.946 in MODEL 221 up to model year 2008 /AEJ 07
ENGINES 272.960 in MODEL 203 up to model year 2008 /AEJ 07
ENGINES 272.963 in MODEL 171 up to model year 2008 /AEJ 07
ENGINES 272.964 in MODEL 211, 219
ENGINES 272.965 in MODEL 221 up to model year 2008 /AEJ 07
ENGINES 272.966 in MODEL 230 up to model year 2008 /AEJ 07
ENGINES 272.967 in MODEL 164, 251 up to model year 2008 /AEJ 07
ENGINES 272.970 in MODEL 203 up to model year 2008 /AEJ 07
ENGINES 272.972 in MODEL 211
ENGINES 272.975 in MODEL 221 up to model year 2008 /AEJ 07
ENGINES 273.922 in MODEL 221 up to model year 2008 /AEJ 07
ENGINES 273.923 in MODEL 164 up to model year 2008 /AEJ 07
ENGINES 273.924 in MODEL 221 up to model year 2008 /AEJ 07
ENGINES 273.960 in MODEL 211, 219
ENGINES 273.961 in MODEL 216, 221 up to model year 2008 /AEJ 07
ENGINES 273.962 in MODEL 211
ENGINES 273.963 in MODEL 164, 251 up to model year 2008 /AEJ 07
ENGINES 273.965 in MODEL 230 up to model year 2008 /AEJ 07
ENGINES 273.967 in MODEL 209
ENGINES 273.968 in MODEL 221 up to model year 2008 /AEJ 07
ENGINES 272.940 in MODEL 209
ENGINES 272.960 in MODEL 209
Shown on engine 272
The mixture composition is maintained within limits as close as possible to λ=1 in order to achieve a high conversion of the exhaust gases in the catalytic converter.
The O 2 sensors detect the oxygen share in the exhaust and transmit corresponding signals to the ME-SFI [ME] control unit. This changes the mixture composition so that in all engine operating statuses, the desired oxygen (usually λ=1) is set. This procedure is repeated (control loop), the control speed is dependent on engine load and speed.
The lambda closed-loop control is operational in the following operating conditions (closed-loop control):
- Coolant temperature > approx. -10°C,
- Blocking time after starting expired
- O2 sensors upstream CAT have reached operating temperature
Lambda control loop
Assuming a leaner air/fuel mixture is produced. The consequence of this is that the O2 sensor voltage drops and the ME-SFI [ME] control unit compensates for this lean drift by enriching the mixture accordingly. This makes it possible to achieve an air/fuel composition of approximately λ=1. The reading of the lambda control factor with the STAR DIAGNOSIS moves towards +25% The more the lambda control factor moves towards +25%, the leaner is the air/fuel mixture and the greater is the enrichment of the mixture on the part of the ME-SFI [ME] control unit.
| Component description for ME-SFI [ME] control unit | GF07.61-P-6000V | ||
| Component description for O 2 sensors | O2 sensors upstream of catalytic converter | GF07.04-P-6100V | |
| O2 sensors downstream of catalytic converter | GF07.04-P-6100VA | ||
| Component description for crankshaft Hall sensor | GF07.04-P-6220V | ||
| O2 sensor heater, function | GF07.61-P-3025V | ||
| Component description for hot film mass air flow sensor | GF07.07-P-6000V | ||
| Component description for coolant temperature sensor | GF07.04-P-6040V | ||
| Self-adjustment of mixture formation, function | GF07.10-P-1029V | ||
| Component description for accelerator pedal sensor | GF30.20-P-2010V | ||
| Component description for three-way catalytic converter | GF07.03-P-6010V | ||
| ME-SFI two-sensor control, function | GF07.61-P-3020V | ||
| Component description for three-way catalytic converter | GF49.10-P-2010V |