Patent ID: 8528521

Claim:
A method for closed-loop combustion control within an internal combustion engine, comprising the steps of: individually calculating of an actual Start of Combustion (SoC) for all cylinders of said internal combustion engine using information from a combustion sensor applied to the internal combustion engine; calculating a 50% Mass Fraction Burned (MFB50) and a SoC information using cylinder pressure sensor information available from at least one leading cylinder of the internal combustion engine; using a pressure-based MFB50 information from said at least one leading cylinder to control in a closed loop; and using a pressure-based SoC information from said at least one leading cylinder as a reference value for comparison with the combustion sensor based value of SoC from the same cylinder in order to calculate the desired SoC for the other cylinders of the engine which are then controlled relative to said at least one leading cylinder.