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Journal Articles Oil & Gas Science and Technology - Revue d'IFP Energies nouvelles Year : 2011

Control Oriented Model of a Variable Geometry Turbocharger in an Engine with Two EGR Loops

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Abstract

In order to make modern Diesel engines cleaner and more fuel efficient, their air systems architecture become more and more complex. The control strategies of these systems must take account of the multiple components interactions with minimal calibration effort required. In this context, model based techniques are very attractive. In this paper, we propose a control oriented model of a variable geometry turbocharger in an architecture with two Exhaust Gas Recirculation (EGR) loops: High Pressure (HP) and Low Pressure (LP). This model is implemented in a basic control strategy and evaluated experimentally during tests with LP or HP EGR. The results show that the choice of EGR circuit has a high influence on the turbocharger actuator position, but that this effect is well taken into account in the proposed model.
Modélisation de compresseur à géométrie variable dédiée au contrôle pour un moteur avec deux boucles EGR-Afin de rendre les moteurs Diesel modernes plus propres et plus économes en carburant, l'architecture de la boucle d'air est de plus en plus complexe. Les stratégies de contrôle doivent tenir compte des interactions entre les dynamiques et doivent être facilement calibrables. Dans ce contexte, l'utilisation de modèle reposant sur des principes physiques est très adaptée. Dans cet article, nous proposons un modèle d'un turbocompresseur à géométrie variable dans une architecture à deux boucles de recirculation des gaz d'échappement (EGR) : haute pression (HP) et basse pression (BP). Ce modèle est la composante principale d'une stratégie de contrôle et est évalué expérimentale-ment lors d'essais avec de l'EGR basse pression et de l'EGR haute pression. Les résultats montrent que le choix du circuit EGR a une grande influence sur la position de l'actionneur turbocompresseur, mais que cet effet est bien pris en compte dans le modèle proposé. Abstract-Control Oriented Model of a Variable Geometry Turbocharger in an Engine with Two EGR Loops-In order to make modern Diesel engines cleaner and more fuel efficient, their air systems architecture become more and more complex. The control strategies of these systems must take account of the multiple components interactions with minimal calibration effort required. In this context, model based techniques are very attractive. In this paper, we propose a control oriented model of a variable geometry turbocharger in an architecture with two Exhaust Gas Recirculation (EGR) loops: High Pressure (HP) and Low Pressure (LP). This model is implemented in a basic control strategy and evaluated experimentally during tests with LP or HP EGR. The results show that the choice of EGR circuit has a high influence on the turbocharger actuator position, but that this effect is well taken into account in the proposed model. 564
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Dates and versions

hal-01937427 , version 1 (02-01-2019)

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J. Chauvin, O. Grondin, P. Moulin. Control Oriented Model of a Variable Geometry Turbocharger in an Engine with Two EGR Loops. Oil & Gas Science and Technology - Revue d'IFP Energies nouvelles, 2011, 66 (4), pp.563-571. ⟨10.2516/ogst/2011103⟩. ⟨hal-01937427⟩

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