ENGINE   113.940 /941 /942 /943 /948 /960 /961 /963 /965 /966 /967 /968 /969 ENGINE   137.970

Shown on engine 119 in model 129, 140 75 Fuel tank 77 Activated charcoal canister B2/5 Hot film mass air flow sensor B11/4 Coolant temperature sensor B17 Intake air temperature sensor L5 Crankshaft position sensor M16/1 Electronic accelerator (EA)/ cruise control (CC)/ idle speed control (ISC) actuator N3/10 ME-SFI control unit N16/1 Base module Y58/1 Purge control valve
		P07.61-0378-06

For controlling 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. 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 pulse width modulation 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 the deceleration mode. The following information is processed in the ME-SFI control unit: Engine speed Air mass (boost pressure in supercharged engines) Coolant temperature Intake air temperature (charge air temperature in supercharged engines)

	Motor electronics control unit, location/task/design/function		GF07.61-P-5000F
	Coolant temperature sensor, location/task/design/function	Engine 112, 113, 137	GF07.04-P-5026A
	Purge control valve, location/task/design/function		GF47.30-P-4030L
	Hot film mass air flow sensor, location/task/design/function	Engine 113, 137	GF07.07-P-4118G
	Crankshaft position sensor, location/task/design/function		GF07.04-P-4116F
	Intake air temperature sensor, location/task/design/function		GF07.04-P-2100F
	Voltage supply of ME-SFI control unit function		GF07.61-P-5001F