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Abstract |
Three Way Catalyst Control using a PI-style Controller with HEGO Sensor Feedback
Recent research has shown that control of the oxygen content in the
catalyst has potential to further reduce the emissions from spark
ignited engines. This gives rise to a cascade structure where an outer
loop influences an inner loop. Different ways of augmenting the inner
loop, a traditional PI-feedback controller based on feedback from the
binary oxygen sensor, are studied. The SI-engine constraints on the
control, such as low emissions and drive ability, are considered in
the evaluation of the controllers. The result is that a delayed switching of the sensor is needed to
control the oxygen content in the TWC using binary sensor feedback.
Per Andersson and Lars Eriksson
CCSSE, 2002
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Last updated: 2021-11-10
