A method for signal processing for a collecting particle sensor

The invention relates to a method for processing an output of a sensor collecting particles in the exhaust gas passage of an internal combustion engine. The invention further relates to a method for processing an output of a sensor collecting particles in the exhaust gas passage of an internal combustion engine, wherein the output signal by means of a low-pass filter is filtered with a predetermined time constant. According to the invention values ​​of the output signal will be continuously stored in a memory, is carried out for processing the output signal of a selection of a predetermined number of last written to the memory values ​​and it is selected or it will be to choose the smallest value of the predetermined number of values ​​for selection a number of smallest values ​​of the predetermined number of values ​​is not accepted or there will not be considered for selecting a number of the largest values ​​from the predetermined number of values. Characterized in that individual or groups of different values ​​in the evaluation does not take into account transient disturbances of the output signal of the collecting particle sensor can be hidden, as can occur by a cross sensitivity of the sensor particles over other conductive exhaust gas components. The procedure does not reduce the dynamics of the signal, as occurs in the low-pass filtering of the prior art.