Based on an oxygen storage model of the three-way catalyst (TWC) an indirect adaptive control system is proposed. Utilizing a recursive Markov estimate method, the parameters involved in the model are identified on-line by measuring the upstream and downstream air-to-fuel ratios. These parameters are then used to estimate the relative oxygen level in the TWC which in turn is used as the control variable for the primary controller.
Indirect Adaptive Control of a Three-Way Catalyst
Sae Technical Papers
International Congress & Exposition ; 1996
1996-02-01
Conference paper
English
Indirect adaptive control of a three-way catalyst
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