Patent ID: 8126633
Filing Date: 2012-02-28
Classification: F02D

Abstract:
1. A method for operating an internal combustion engine, with at least a first map of prefixed first values is predetermined, each prefixed first value being a function of a prefixed nominal fuel quantity (Q ecu prefix ), the method comprising the steps of: determining a nominal fuel quantity (Q calculating an actual, torque forming, injected fuel quantity of said injection (Q wherein said actual, torque forming, injected fuel quanity (Q UEGO ) is calculated according to a following equations where A afm is an air mass measured by an air mass sensor, λ is an air to fuel ratio and “fac” is a predetermined constant provided by the equation: where ρ is a fuel density and (A/F) st is a stoichiometric air to fuel ratio; calculating an at least one first parameter (Q modifying said nominal fuel quantity (Q comparing said corrected fuel quantity (Q operating the internal combustion engine using, from the first map, the first values which correspond to said corrected fuel quantity (Q