Method of adapting component in exhaust aftertreatment system of motor vehicle, involves adjusting oxygen mass flow rate of oxygen-storage model and reducing agent mass flow rate of reducer storage model by remaining adjustment signal

摘要

#CMT# #/CMT# An adjustment signal is generated by converting (3) difference signal between limit function and estimated lambda value into corresponding difference of reducing agents using total mass flow rate of fuel and measured lambda value. The concentration of reducing agents is adjusted by adjustment signal. The oxygen mass flow rate and reducing agent mass flow rate of respective storage models are adjusted (5,6) by remaining adjustment signal. The adaptation of nitrogen oxide concentration to nitrogen oxide storage model is performed (7) by remaining adjustment signal. #CMT#USE : #/CMT# Method of adapting component in exhaust aftertreatment system of motor vehicle e.g. motor car. #CMT#ADVANTAGE : #/CMT# The adaptation of post-treatment component in exhaust air system is enhanced. The component can be adapted in exhaust aftertreatment system by using a simple technique in precise and efficient manner. The robustness of motor vehicle is improved. The safety of operation of post-treatment component is increased, by using long-term adaptation rate. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a flow diagram illustrating the process for adapting component in exhaust aftertreatment system of motor vehicle. 1 : Step for measuring lower limit lambda value 2 : Step for determining adaptation signal 3 : Step for converting difference signal between limit function and estimated lambda value 5,6 : Steps for adjusting oxygen mass flow rate and reducing agent mass flow rate of respective storage models 7 : Step for adapting nitrogen oxide concentration in nitrogen oxide storage model.