Patent ID: 7793536
Filing Date: 2010-09-14
Classification: F02D,G01N,Y02T

Abstract:
1. A method of determining a composition of a fuel mixture from a first fuel and at least a second fuel for operation of an internal combustion engine having at least a combustion chamber, wherein the first fuel and at least the second fuel have different boiling points or different enthalpies of evaporation, the method comprising: determining a pressure in the combustion chamber; determining a parameter associated with the pressure in the combustion chamber; determining a time history of the pressure in the combustion chamber; determining a time history of a parameter associated with the pressure in the combustion chamber; whereby the pressure and the parameter associated with the pressure and the time history of the pressure and the time history of a parameter associated with the pressure in the combustion chamber are determined during an injection of the fuel mixture into the combustion chamber or after an injection of the fuel mixture into the combustion chamber, wherein an injection of the fuel mixture occurs during a compression phase of a fuel-air mixture.