Title: Assessment of simulation-based calibration for fuel economy optimisation

Authors: Konstantinos Siokos; Rohit Koli; Robert Prucka

Addresses: Department of Automotive Engineering, Clemson University International Center for Automotive Research, 4 Research Drive, Greenville, SC 29607, USA ' Department of Automotive Engineering, Clemson University International Center for Automotive Research, 4 Research Drive, Greenville, SC 29607, USA ' Department of Automotive Engineering, Clemson University International Center for Automotive Research, 4 Research Drive, Greenville, SC 29607, USA

Abstract: The increasing complexity of modern engine configurations introduces challenges during the calibration process. Multi-objective optimisation requires multiple experiments to cover wide ranges of control actuator set-points. Simulation-based calibration provides a valuable tool that significantly decreases mapping times and provides initial estimations for engine behaviour. In this research, one-dimensional simulation software is used to model, calibrate and optimise an engine configuration under fuel economy considerations. A design of experiments (DoE) approach is implemented to identify influences of various control actuators on engine performance. Post-processing of the DoE is discussed and the optimisation process that provides the engine mapping is evaluated. Various constraints are applied during optimisation and the results' quality and consistency is assessed for two different spark-ignition engine configurations; a V6 naturally aspirated engine and a 4-cylinder turbocharged engine with low pressure EGR. Finally, simulation results are experimentally validated with dynamometer testing to determine the accuracy of the methods presented.

Keywords: simulation; models; calibration; optimisation; simulation-based calibration; fuel economy; model-based calibration; fuel economy optimisation; design of experiments; DoE; engines; SI engines; spark ignition engines; gasoline engines; GT-Power.

DOI: 10.1504/IJPT.2017.085681

International Journal of Powertrains, 2017 Vol.6 No.2, pp.151 - 168

Received: 31 Jan 2015
Accepted: 15 Feb 2016
Published online: 07 Aug 2017 *

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