An adaptive estimator of fuel film dynamics in the intake port of a spark ignition engine |
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| Affiliation: | 1. Department of Mechanical Engineering, University of Salerno, 84084 Fisciano, SA, Italy;2. Department of Control Systems, ÉLASIS, 80038 Pomigliano D’Arco, NA, Italy;1. Key Laboratory for Measurement and Control of Sichuan Province, School of Transportation & Automotive Engineering, Xihua University, Chengdu, 610039, China;2. Oujiang College, Wenzhou University, Wenzhou, 325035, China;1. Clean Combustion Engine Laboratory, Department of Mechanical, Automotive and Material Engineering, University of Windsor, Ontario, Canada;2. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, China;1. State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Sci. & Tech., Wuhan, Hubei, China;2. DFM Commercial Vehicle Technology Center, Wuhan, Hubei, China |
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| Abstract: | In order to meet the limits imposed on automotive emissions, engine control systems are required to constrain air/fuel ratio (AFR) in a narrow band around the stoichiometric value, due to the strong decay of catalyst efficiency in case of rich or lean mixture. An adaptive estimator, based on an extended Kalman filter, is proposed for the fuel film dynamics in the intake port of a spark ignition engine. The observer is based on a two states mean value model which accounts for the impingement of the injected fuel on the manifold walls and the evaporation process. The observer has been tested on a set of experimental transient maneuvers, showing a good accuracy in predicting the AFR. |
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