METHOD AND DEVICE FOR DIAGNOSIS OF A PARTICLE FILTER ARRANGED IN THE EXHAUST GAS SYSTEM OF A PETROL-OPERATED INTERNAL COMBUSTION ENGINE

A method for determining a presence of a particle filter (22) in the exhaust gas tract (20) of a petrol-operated internal combustion engine (10) comprises: determining a measured differential pressurecurve (100) from a first pressure curve (110) measured in the exhaust gas tract (20) using a first pressure sensor (25) arranged upstream of an installation position (35) of the particle filter (22),and a second pressure curve (120) measured using a second pressure sensor (26) arranged downstream of an installation position (35) determining a first result curve (130) with a first low-pass filtration of the measured differential pressure curve (100); determining a second result curve (140) by means of a second low-pass filtration of the first result curve (130); determining a first differential result curve (150) by forming the difference between the first result curve (130) and the second result curve (140); determining a first amount result curve (160) by forming the amount of the firstdifferential result curve