Fast Gas Concentration Measurements for Model Validation of Catalytic Converters

Paper #:
  • 950477

Published:
  • 1995-02-01
Citation:
Germann, H., Onder, C., and Geering, H., "Fast Gas Concentration Measurements for Model Validation of Catalytic Converters," SAE Technical Paper 950477, 1995, https://doi.org/10.4271/950477.
Pages:
9
Abstract:
By comparing model and real converter performance, concise models of three-way catalyst (TWC) dynamics permit a more reliable diagnosis of converter aging than conventional approaches. Also, future model-based engine control systems should manage the state of the TWC in a way to reduce emissions. For model validation, results of transient gas concentration measurements on a dynamic test bench with an SI engine are shown. To identify the occurring fast transient phenomena, very fast multichannel gas analyzers must be used. Simulation results using a recent model of the catalytic converter are compared with actual measurements and lambda sensor readouts.
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