Patent ID: 6871134
Filing Date: 2005-03-22
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A method for determining the exhaust gas recirculation mass flow of an internal combustion engine, comprising the steps of: mixing fresh air with exhaust gas from the internal combustion engine recirculated via an exhaust gas recirculation pipe, supplying the resulting gas mixture to at least one cylinder of the internal combustion engine, determining the exhaust gas recirculation mass flow of the exhaust gas recirculated via the exhaust gas recirculation pipe by determining a characteristic curve, dependent on various operating parameters of the internal combustion engine, representing the cylinder mass flow of the gas mixture supplied to the at least one cylinder of the internal combustion engine, measuring the fresh air mass flow of the fresh air, adapting the characteristic curve of the cylinder mass flow to the fresh air mass flow known for various operating points of the internal combustion engine, and determining the exhaust gas recirculation mass flow as a function of the fresh air mass flow measured at a particular transient operating point of the internal combustion engine, using the adapted characteristic curve of the cylinder mass flow.