Method for determining angle position of combustion of internal combustion engine, involves determining parameter of model function, and determining characteristics of combustion of engine depending on parameter

摘要

The method involves detecting a sequence of rotational speed values during operation of an internal combustion engine, where the sequence of the rotational speed values is approximated as a periodic function with a model function i.e. Fourier series function. A parameter i.e. Fourier coefficient, of the model function is determined, and characteristics i.e. angle position, of combustion of the engine are determined depending on the parameter. A scalar product is computed with one of the rotational speed values of the sequence of rotational speed values.