Procedure for determining the top dead centre of a combustion engine with neural learning

At a number of important points the in-cylinder pressure variation is measured together with the crankshaft angle. These are stored as digital pairs in a data record if necessary with further engine specific parameters in a knowledge based system (10). The knowledge-based system is trained using the data record so that it can be used with different engines under different operating conditions. For use with different engines a number of pressure measurement values are input for a number of points in the operating cycle.