METHOD AND COMPUTER PROGRAM FOR DIFFERENTIATING A FLOW RATE ERROR AND A DYNAMIC ERROR OF AN EXHAUST GAS RECIRCULATION SYSTEM

The invention relates to a method and a computer program for recognizing and differentiating a flow rate error and a dynamic error of an exhaust gas recirculation system (EGR) of an internal combustion engine (10). Measured and modeled EGR mass flow signals are each subjected to bandpass filtering using time constants optimized for determining flow rate errors and bandpass filtering using time constants optimized for determining dynamic errors. The energy is determined for each of the filtered signals and an energy quotient is computed between the energies of the signals filtered for dynamic errors and the signals filtered for flow rate errors. A dynamic error and a flow rate error of the exhaust gas recirculation may be recognized and differentiated from one another on the basis of the energy quotients. 本发明涉及种用于识别和区分内燃机（10）的废气再循环（AGR）的流量故障和动态故障的方法。在此，分别使所测量的和所建模的AGR-质量流经受具有被优化用以确定流量故障的时间常数的带通过滤和具有被优化用以确定动态故障的带通过滤。分别为被过滤的信号确定所述能量，并且计算在被过滤用于动态故障的信号的与被过滤用于流量故障的信号的能量之间的能量商。根据所述能量商能够识别并且相互区分所述废气再循环的动态故障和流量故障。