Mathematical optimization of variable valve timing for reducing fuel consumption of A SI engine

Authors

  • Amir-Hasan Kakaee School of Automotive Engineering, Iran University of Science and Technology, Tehran, Iran
  • Mehdi Keshavarz School of Automotive Engineering, Iran University of Science and Technology, Tehran, Iran
  • Amin Paykani School of Automotive Engineering, Iran University of Science and Technology, Tehran, Iran
  • Mohaamad Keshavarz Department of Mechanical Engineering, Arsanjan Branch, Islamic Azad University, Arsanjan, Iran

Keywords:

sensitivity analysis, valves timing, gt-power, matlab-simulink

Abstract

In this study, the sensitivity analysis and Quasi-Newton algorithms are used to optimize valve timing XU7/L3 engine in order to reduce fuel consumption and increase engine performance. At first, all components of engine are modeled in GT-POWER and a comparison with experimental results is performed to confirm the accuracy of the model. Then, GT-POWER model is coupled with MATLAB-SIMULINK to control inputs and outputs with sensitivity analysis and Quasi-Newton algorithms. The results obtained indicate that optimal valve timing significantly reduces brake specific fuel consumption (BSFC). Moreover, the convergence rate of Quasi-Newton algorithm for reaching the optimal point is higher than the one of sensitivity analysis algorithm.

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Published

2016-01-27

Issue

Engineering Review, Vol. 36, No. 1

Section

Articles

License

Copyright 2011 by Faculty of Engineering University of Rijeka, Faculty of Civil Engineering University of Rijeka. All rights reserved. This material may not be reproduced or copied, in whole or in part, in any printed, mechanical, electronic, film, or other distribution and storage media without the written consent of the publisher.

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