A novel first principle based control oriented model of a gasoline engine is proposed which also carries diagnostic capabilities. Unlike existing control oriented models, the formulated model reflects dynamics of the faultless as well as faulty engine with high fidelity. In the proposed model, the torque production subsystem is obtained by integration of further two subsystems that is model of a single cylinder torque producing mechanism and an analytical gasoline engine cylinder pressure model. Model of a single cylinder torque producing mechanism is derived using constrained equation of motion (EOM) in Lagrangian mechanics. While cylinder pressure is evaluated using a closed form parametric analytical gasoline engine cylinder pressure model. Novel attributes of the proposed model include minimal usage of empirical relations and relatively wider region of model validity. Additionally, the model provides model based description of crankshaft angular speed fluctuations and tension in the rigid bodies. Capacity of the model to describe the system dynamics under fault conditions is elaborated with case study of an intermittent misfire condition. Model attains new capabilities based on the said novel attributes. The model is successfully validated against experimental data.
First Principle Based Control Oriented Gasoline Engine Model Including Lumped Cylinder Dynamics
Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT,AND CONTROL. Manuscript received May 9, 2017; final manuscript received January 12, 2018; published online March 13, 2018. Assoc. Editor: Beshah Ayalew.
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Yar, A., Bhatti, A. I., and Ahmed, Q. (March 13, 2018). "First Principle Based Control Oriented Gasoline Engine Model Including Lumped Cylinder Dynamics." ASME. J. Dyn. Sys., Meas., Control. August 2018; 140(8): 081011. https://doi.org/10.1115/1.4039195
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