Abstract

CASTILLO BUENAVENTURA, Felipe; WITRANT, Emmanuel; TALON, Vincent  and  DUGARD, Luc. Air Fraction and EGR Proportion Control for Dual Loop EGR Diesel Engines. Ing. Univ. [online]. 2015, vol.19, n.1, pp.115-133. ISSN 0123-2126.  https://doi.org/10.11144/Javeriana.iyu19-1.aegr.

This paper describes a novel technique to control the air fraction in the intake of dual-loop exhaust gas recirculation (EGR) Diesel engines. This control strategy enables to efficiently regulate the air fraction while satisfying a desired EGR proportion (between low-pressure EGR and high-pressure EGR). Based on a modified physical model of the air fraction dynamics along the engine air-path, a linear parameter varying (LPV) linear quadratic regulator (LQR) control is designed to ensure the stability of the air fraction while minimizing a quadratic performance index. The controllability of the system, necessary for the LPV-LQR control design, is verified by defining a convex parameter set using a polytopic approach. The controller is evaluated under strong transient conditions using an engine model that has been experimentally validated as a reference.

Keywords : LPV Control; Diesel engines; LQR.

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