METHOD AND DEVICE TO MONITOR THE FUNCTIONING OF A CATALYST IN AN INTERNAL COMBUSTION ENGINE

摘要

Method and device to monitor functioning of a catalyst (15) mounted in the exhaust gas section (3) of an internal combustion engine (1), enabling determination of the conversion rate as a function of the temperature of the catalyst (15) during heat-up operation. By evaluating the relationship between the conversion rate and the temperature, which changes with the age of the catalyst, highly precise monitoring and diagnosis of a non-functioning catalyst (15) can be made.