Method for recognizing a fuel type in a diesel engine

摘要

A method for recognizing the fuel type in a diesel engine; the method envisages determining a stoichiometric air/fuel ratio of the last type of fuel used; determining a quantity of fresh air fed to a number of cylinders of the engine; determining a quantity of fuel injected in the cylinders; determining a theoretical air/fuel ratio of combustion according to the quantity of fresh air fed to cylinders, according to the quantity of fuel injected into cylinders, and according to the stoichiometric air/fuel ratio of the last type of fuel used; determining an actual air/fuel ratio of combustion; comparing the theoretical air/fuel ratio with the actual air/fuel ratio; and recognizing the fuel type actually used according to the comparison between the theoretical air/fuel ratio and the actual air/fuel ratio.