Patent ID: 7788018

Claim:
A method for controlling an internal combustion engine having a common rail system together with individual accumulators, the method comprising the steps of: determining a rotational speed-control deviation (dn) from a target rotational speed (nSL) that represents a set point for an outer control loop to control rotational speed, as well as from the actual rotational speed (nIST); determining a target torque (MSL) from the rotational speed-control deviator (dn) via a rotational speed controller as a master controller; determining a target injection duration (SD(SOLL)) from the target torque (MSL), the target injection duration (SD(SOLL)) representing the set point for an inner control loop for controlling cylinder-specific injection duration; determining an injection duration deviation (dSD) from the target injection duration (SD(SOLL)) and from an actual injection duration (SD(IST)); determining a correcting variable from the injection duration deviation (dSD) via an injection duration controller as a follow-up controller; and determining an injection duration (SD) from the correcting variable and the target injection duration (SD(SOLL)) for activating injectors.