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Dynamic EGR Estimation for Production Engine Control
Technical Paper
2001-01-0553
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
A dynamic EGR State Estimator (ESE) intended for production engine management systems (EMS) implementation is presented. It better describes the development of external exhaust gas recirculation (EGR) concentration at the engine intake ports during EGR transients than traditional models. The dynamics of EGR concentration time and spatial development in the intake manifold are described as a perfect mixing model in the intake manifold plenum volume and non-mixing plug flow in the intake manifold runners. The time scale of EGR transients precludes the use of traditional EGR measurement techniques for model verification. Instead a wide range air fuel (WRAF) sensor is used. Results are shown for a large variation in operating conditions and compared to the performance of a traditional model. The introduction of an exhaust inert ratio model converts the EGR estimate into the inert EGR concentration, the distinction between total and inert EGR concentration being of relevance for lean operating engines.
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Authors
Citation
Müller, M., Olin, P., and Schreurs, B., "Dynamic EGR Estimation for Production Engine Control," SAE Technical Paper 2001-01-0553, 2001, https://doi.org/10.4271/2001-01-0553.Also In
Electronic Engine Controls: Modeling, Controls, Obd and Neural Networks
Number: SP-1585; Published: 2001-03-05
Number: SP-1585; Published: 2001-03-05
References
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