The engine smoothness control facility balances out the speed fluctuations of the individual cylinders caused by different injection quantities and degrees of cylinder efficiency. This is achieved by rapid application of controlled corrected injection quantities for each cylinder.
The correction quantities are limited to max. ±10 mm3/stroke/cylinder
With the phase-in of DDE software version A1 as from 03/2000 the maximum correction volume is dependent on the injection volume and is between ± 5.9 and ± 10 mm3/stroke/cylinder.
The control is active within a certain engine speed and injection volume range:
Smooth running control will be monitored by the diagnosis with the introduction of DDE software version A1 from 03/2000.
Fault code 1613 ”smooth running controller” is stored in the DDE control unit if the correction quantity at a cylinder exceeds a defined limit. The limit value is dependent on the injection volume and is between ± 5.9 and ± 9.9 mm3/stroke/cylinder.