GF07.61-P-4009KE ME-SFI Synchronization of Fuel Injection and Firing Order, Function

GF07.61-P-4009KE ME-SFI Synchronization Of Fuel Injection And Firing Order, Function
- up to model year 08

Component Identification:

When the engine is started, defining the injection order in line with the firing order, on the basis of the signals supplied by the crankshaft position sensor and the inlet camshaft Hall sensor.

The teeth on the clutch plate or flywheel causes the crankshaft position sensor to generate an AC voltage for a rotating crankshaft. During this operation, each tooth generates an alternating voltage signal. No voltage is generated as a result of the gap created by 2 missing teeth. 73° crankshaft angle after the gap, the ME control unit detects the TDC position of cylinder 1.

If, at this moment, the signal from the intake camshaft Hall sensor is at 12 V (high), the ME control unit processes this in order to detect ignition TDC of cylinder 1.

Synchronization of the injection and firing order is processed by the ME-SFI [ME] control unit for actuation of the ignition coils and the fuel injection valves.

Furthermore synchronization is required for the knock control and the fuel shutoff on the individual cylinders.

If no signal is received from the intake camshaft Hall sensor, the signal from the exhaust camshaft Hall sensor is used as a substitute value by the ME control unit to determine the ignition TDC of cylinder 1.