ME-SFI synchronization of fuel injection and firing order, function - GF07.61-P-4009SM
ENGINE 113.986
ENGINE 113.987
ENGINE 113.988
ENGINE 113.989
When the engine is started, the injection sequence in line with the firing order is defined on the basis of the signals supplied by the crankshaft position sensor (L5) and the camshaft Hall sensor (B6/1)
Signal assignment
When the crankshaft is rotating, an alternating voltage is generated in the crankshaft position sensor by the teeth of the driven plate. 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.
The ME control unit detects the TDC position of cylinders N3/101 and 6 with the 2nd negative slope after the gap:
If, at this moment, the signal from the camshaft Hall sensor is at 0 volt ("low") 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 control unit for actuating the ignition coils (T1/1 to T1/8) and the fuel injection valves (Y62).
In addition the synchronization is required for the anti-knock control and the fuel cut-off on the individual cylinders.
| Fuel injection valves, component description | Y62 | GF07.03-P-6010SM | |
| Crankshaft position sensor component description | L5 | GF07.04-P-6010SM | |
| Camshaft Hall sensor component description | B6/1 | GF07.04-P-6020SM | |
| ME-SFI [ME] control unit component description | N3/10 | GF07.61-P-6000SM | |
| Spark plug component description | R4 | GF15.10-P-2000SM | |
| Component description of ignition coil | T1/1-T1/8 | GF15.10-P-2100SM |