METHOD AND DEVICE FOR DETECTING THE PRESENCE OF AN EXHAUST GAS TREATMENT SYSTEM IN AN EXHAUST LINE OF AN INTERNAL COMBUSTION ENGINE

摘要

The invention relates to a method and device for detecting the presence of an exhaust gas treatment system in an exhaust line of an internal combustion engine. The inventive method of detecting the presence of an exhaust gas treatment system in an exhaust line (22) of an internal combustion engine of a motor vehicle, consists in: determining the derivative of the temperature upstream of the treatment system (28), determining the derivative of the temperature downstream of the treatment system (28), and comparing the downstream temperature derivative with a threshold value for detecting the absence of the treatment system using a pre-determined upstream temperature derivative level.