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Observations of Trans-stoichiometric AFR Spikes in UEGO Sensors
Technical Paper
2000-01-2837
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper presents experimental data showing unexpected transient behaviour in several production universal exhaust gas oxygen (UEGO) sensors. The spike-like transients occur when passing through the stoichiometric point, and are particularly significant when passing from rich to lean. The paper illustrates how the spikes are affected by exhaust gas flow rate, deviation of air-to-fuel ratio (AFR) from stoichiometry, and rate of change of AFR while passing through stoichiometry. The spikes are most sensitive to the rate at which AFR passes through stoichiometry. Brief discussions on possible causes for the spikes, and on undesirable consequences for feedback control applications, are included.
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Citation
Davison, D., Cornelius, S., Collings, N., and Glover, K., "Observations of Trans-stoichiometric AFR Spikes in UEGO Sensors," SAE Technical Paper 2000-01-2837, 2000, https://doi.org/10.4271/2000-01-2837.Also In
References
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