US Patent 7877195 Method for the estimation of combustion parameters

Method for combustion engine control comprising an engine, at least one sensor and at least one engine control unit (200) arranged to control the engine (100) by the use of real time sensor data S(k) characterized in that a prior (P1(k, j; z), P2(k; X, Y) is used to derive at least one combustion parameter estimate (X(k)) and/or at least one combustion parameter measurement (Y(k)) from the real lime sensor data (S(k)) and that the at least one combustion parameter estimate (X(k)) and/or the at least one combustion parameter measurement (Y(k)) is used in performing said engine control.