Purge control valve actuation, function - GF07.61-P-3013V

ENGINES 272.920 in MODEL 203 up to Model Year 08/Modification Year 07

ENGINES 272.922 in MODEL 211

ENGINES 272.940 in MODEL 203 up to Model Year 08/Modification Year 07

ENGINES 272.941 in MODEL 203 up to Model Year 08/Modification Year 07

ENGINES 272.942 in MODEL 171 up to Model Year 08/Modification Year 07

ENGINES 272.943 in MODEL 211, 219

ENGINES 272.944 in MODEL 211

ENGINES 272.945 in MODEL 251 up to Model Year 08/Modification Year 07

ENGINES 272.946 in MODEL 221 up to Model Year 08/Modification Year 07

ENGINES 272.960 in MODEL 203 up to Model Year 08/Modification Year 07

ENGINES 272.963 in MODEL 171 up to Model Year 08/Modification Year 07

ENGINES 272.964 in MODEL 211, 219

ENGINES 272.965 in MODEL 221 up to Model Year 08/Modification Year 07

ENGINES 272.966 in MODEL 230 up to Model Year 08/Modification Year 07

ENGINES 272.967 in MODEL 164, 251 up to Model Year 08/modification year 07

ENGINES 272.970 in MODEL 203 up to Model Year 08/Modification Year 07

ENGINES 272.972 in MODEL 211

ENGINES 272.975 in MODEL 221 up to Model Year 08/Modification Year 07

ENGINES 273.922 in MODEL 221 up to Model Year 08/Modification Year 07

ENGINES 273.923 in MODEL 164 up to Model Year 08/Modification Year 07

ENGINES 273.924 in MODEL 221 up to Model Year 08/Modification Year 07

ENGINES 273.960 in MODEL 211, 219

ENGINES 273.961 in MODEL 216, 221 up to Model Year 08/modification year 07

ENGINES 273.962 in MODEL 211

ENGINES 273.963 in MODEL 164, 251 up to Model Year 08/modification year 07

ENGINES 273.965 in MODEL 230 up to Model Year 08/Modification Year 07

ENGINES 273.967 in MODEL 209

ENGINES 273.968 in MODEL 221 up to Model Year 08/Modification Year 07

ENGINES 272.940 in MODEL 209

ENGINES 272.960 in MODEL 209

Shown on engine 272 in model 171

Fig 1: Purge Control Valve Actuation Function Diagram

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

To control the purge quantity, the purge control valve is actuated at the ground side by the ME-SFI control unit by means of a pulse width-modulated signal (PWM signal). The purge quantity is determined by constantly opening and closing the purge control valve for on and off periods of various lengths.

The frequency of the PWM signal is selected from a speed-dependent characteristic in such a way, that all cylinders are uniformly supplied with fuel vapors.

The purge control valve is actuated when the engine is at operating temperature, but not in deceleration fuel shutoff.

The following information is processed in the ME-SFI control unit:

Engine speed
Air mass
Coolant temperature
Intake air temperature
Lambda signals

ME-SFI [ME] control unit, component description		GF07.61-P-6000V
Component description for the purge control valve		GF47.30-P-2020V
Coolant temperature sensor, component description		GF07.04-P-6040V
Component description for the crankshaft Hall sensor		GF07.04-P-6220V
Hot film mass air flow sensor, component description		GF07.07-P-6000V
Throttle valve actuator, component description		GF30.20-P-2020V
Component description for the vent valve	Model 171 and 230, except	GF47.30-P-3100VA
Activated charcoal canister, component description		GF47.30-P-2010V