Cold Start Control

OPERATION
During the start phase, fuel is injected several times for each cylinder group per crankshaft revolution. The quantity of fuel is adapted dependent on the engine temperature and engine speed.
In addition, the injection timing is retarded the higher the temperature and the lower the start engine speed.
After the engine has started (as of approx. 600 rpm), fuel is injected only once per turn of the crankshaft and cylinder group. This means that during the first turn fuel is injected into cylinders 2+4+6 and during the second turn 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 600 crank angle.
During the initial period after engine start, the initially injected quantity is reduced depending upon the temperature and engine speed in order to avoid an excessively rich mixture. If start is repeated within one minute, the complete initial quantity is no longer injected.
During the warm-up phase. the injection timing and the ignition timing are correspondingly varied also dependent upon engine speed and temperature.
These measures are intended to ensure a lower fuel consumption, good throttle response and smooth engine operation.