Cold Start Control

During the start phase, fuel is injected several times for each cylinder group per crankshaft revolution. The quantity of fuel is adjusted depending on the engine temperature and engine speed.

In addition, the injection timing is retarded at higher engine temperatures and at slower engine cranking speeds.







M73 Engine Example: After the engine has started (as of approx. 600 rpm), fuel is injected only once per revolution of the crankshaft and cylinder group.

- This means that during the first crankshaft revolution fuel is injected into cylinders 2+4+6 simultaneously and during the second revolution into cylinders 1+3+5.

The cylinders 8+10+12 and 7+9+11 are supplied with fuel in the same way but offset by 60° crank angle.