MFB50 on-board estimation methodology for combustion control |
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Authors: | Fabrizio Ponti Vittorio Ravaglioli Davide Moro Gabriele Serra |
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Affiliation: | 1. University of Bologna, DIEM, Italy;2. University of Bologna, DIEM, via Seganti 103, 47121 Forli, Italy;3. Magneti Marelli Powertrain, Italy |
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Abstract: | Due to the increasing request for pollutant emissions reduction, modern closed-loop combustion control strategies require the on-board evaluation of the center of combustion (MFB50), i.e. the angular position where 50% of the injected fuel mass is burned. This work presents an MFB50 estimation algorithm based on engine speed measurement, that can be performed using the same toothed wheel already present on-board. Therefore, this approach is compatible with on-board application and requires no additional hardware cost. The complete methodology has been applied to a Diesel engine mounted on-board a vehicle and the accuracy of the obtained results is compatible with on-board requirements. |
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Keywords: | Combustion control Center of combustion Torsional model Indicated torque |
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