Patent ID: 7853393

Claim:
A method for operating an internal combustion engine having a plurality of cylinders, wherein at least one cylinder is implemented as a reference cylinder to which an active cylinder pressure sensor is assigned, and wherein the remaining cylinders are each assigned a passive cylinder pressure sensor, wherein the active cylinder pressure sensor has been calibrated prior to operating the internal combustion engine; wherein each passive cylinder pressure sensor is calibrated during operation; the cylinders each being assigned at least one final control element and a crankshaft angle sensor being provided, the method comprising the steps of: in a quasi-steady-state operating state of the internal combustion engine: carrying out equalization of cylinder segment times assigned to the individual cylinders by intervening in at least one actuator signal of a final control element assigned to the respective cylinder, and assigning the measurement signal of the active cylinder pressure sensor to the measurement signals of the passive cylinder pressure sensors; and carrying out adjustment of the signal processing of the measurement signals of the passive cylinder pressure sensors as a function of the respective measurement signals of the passive cylinder pressure sensors obtained in the quasi-steady-state operating state and of the assigned measurement signal of the active cylinder pressure sensor.