Patent ID: 6758034
Filing Date: 2004-07-06
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
A method of operating an internal combustion engine of a motor vehicle, in which fuel is injected into a combustion chamber in a rich mode of operation and in a lean mode of operation, in which switching takes place between the rich mode of operation and the lean mode of operation, and in which nitrogen oxides are stored in a catalyst, the method comprising:determining a quality function for storing the nitrogen oxides in the catalyst as a function of a period of time, after which the rich mode of operation breaks through the catalyst, and as a function of a plurality of consecutive periods of time; and determining a change in a slope of the quality function and influencing the switching between the rich mode of operation and the lean mode of operation as a function of the slope of the quality function.