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

ENGINE 272.920 in MODEL 203

ENGINE 272.922 in MODEL 211

ENGINE 272.940 in MODEL 203, 209

ENGINE 272.941 in MODEL 203

ENGINE 272.942 in MODEL 171

ENGINE 272.943 in MODEL 211

ENGINE 272.944 in MODEL 211

ENGINE 272.945 in MODEL 251

ENGINE 272.946 in MODEL 221

ENGINE 272.960 in MODEL 203, 209

ENGINE 272.963 in MODEL 171

ENGINE 272.964 in MODEL 211, 219

ENGINE 272.965 in MODEL 221

ENGINE 272.966 in MODEL 230

ENGINE 272.967 in MODEL 164, 251

ENGINE 272.970 in MODEL 203

ENGINE 272.972 in MODEL 211

ENGINE 272.975 in MODEL 221

ENGINE 273.922 in MODEL 221

ENGINE 273.923 in MODEL 164

ENGINE 273.924 in MODEL 221

ENGINE 273.943 in MODEL 164

ENGINE 273.960 in MODEL 211, 219

ENGINE 273.961 in MODEL 216, 221

ENGINE 273.962 in MODEL 211

ENGINE 273.963 in MODEL 164, 251

ENGINE 273.965 in MODEL 230

ENGINE 273.967 in MODEL 209

ENGINE 273.968 in MODEL 221

Shown on engine 272 in model 171

Fig 1: Purge Control Valve Actuation, Function - Shown On Engine 272 In Model 171

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

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