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

Shown on Engine 119 B2/5 Hot film MAFsensor 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 T1/1- T1/8 Ignition coils, cylinder 1 to 8
		P07.61-0402-06

Task Reducing the thermal stresses on the engine at high temperatures. Design/function The ignition timing point is retarded by the ME-SFI control unit in line with the intake air temperature (charge air temperature in the case of supercharged engines) and "load" (engine speed and air mass). The ignition timing point is retarded only if the engine is operating at a high load and begins from an intake air temperature of approx. +35 °C and reaches its maximum at approx. +65 °C.

Example for full load: 35 °C (retarded 3.5° crank angle) 45 °C retarded 6.3° crank angle 65 °C (retarded 9.5° crank angle) The following information is processed in the ME-SFI control unit: Intake air temperature (charge air temperature in supercharged engines) Engine speed/crankshaft position/ignition circuit detection Throttle valve position Air mass (boost pressure in supercharged engines).

	Motor electronics control unit, location/task/design/function		GF07.61-P-5000F
	Intake air temperature sensor, location/task/design/function		GF07.04-P-2100F
	Crankshaft position sensor, location/task/design/function		GF07.04-P-4116F
	Electronic accelerator/cruise control/idle speed control actuator location/task/design/function		GF30.22-P-4010F
	Hot film mass air flow sensor, location/task/design/function	Engine 113, 137	GF07.07-P-4118G
	ME-SFI synchronizing fuel injection and firing order function		GF07.61-P-4009F
	ME-SFI ignition system function		GF15.12-P-0001F
	ECI ignition system function	Engine 137	GF15.15-P-3000L