Development and experimental validation of a control-oriented Diesel engine model for fuel consumption and brake torque predictions

Fabio Chiara, Junmin Wang, Chinmaya B. Patil, Ming-Feng Hsieh and Fengjun Yan

Mathematical and Computer Modelling of Dynamical Systems, 2011, vol. 17, issue 3, 261-277

Abstract: This article describes the development and experimental validation of a control-oriented, real-time capable, Diesel engine instantaneous fuel consumption and brake torque model under warmed-up conditions with only two inputs: torque request and the engine speed and no other measurements. Such a model, with the capability of reliably and computationally efficiently estimating the aforementioned variables at both steady-state and transient engine-operating conditions, can be utilized in the context of real-time control and optimization of hybrid power train systems. Although Diesel engine dynamics are highly non-linear and very complex, by considering the Diesel engine and its control system, that is, engine control unit together as an entity, it becomes possible to predict the engine instantaneous fuel consumption and torque based on only those two inputs. A synergy between different modelling methodologies including physically based grey-box and data-driven black-box approaches were integrated in the Diesel engine model. The fuelling and torque predictions have been validated by means of experimental data from a medium-duty Diesel engine at both steady-state and transient operations, including engine start-ups and shutdowns.

Date: 2011
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DOI: 10.1080/13873954.2011.562902

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