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Engineering Review : International journal for publishing of original researches from the aspect of structural analysis, materials and new technologies in the field of mechanical engineering, shipbuilding, fundamental engineering sciences, computer sciences, electrical engin, Vol. 36 No. 1, 2016.

Original scientific paper

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

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

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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.

Keywords

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

Hrčak ID:

151842

URI

https://hrcak.srce.hr/151842

Publication date:

27.1.2016.

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