Abstract
Automotive emissions are strictly regulated by environmental legislation. To maximise exhaust gas conversion efficiencies under transient conditions the dynamics of the three-way catalyst (TWC) need to be considered. Oxygen storage dominated models are conventionally used to describe the nonlinear dynamic behaviour of TWCs. In this paper, a nonlinear identification method is applied to model the system, based on measurements of upstream and downstream air-fuel ratio (AFR). The performance of the obtained NARMAX models is directly compared with that of an oxygen storage model. The results highlight some of the limitations of the latter, while demonstrating the advantages of nonlinear modelling.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
