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Journal of CombustionVolume 2011 2011, Article ID 678719, 8 pages

Research ArticleDepartment of Automotive Engineering, Iran University of Science and Technology, Tehran, Iran

Received 24 December 2010; Accepted 12 January 2011

Academic Editor: Xingcai Lu

Copyright © 2011 A. H. Kakaee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The performance of a spark ignition engine is investigated under different values of ignition advance. A two-zone burnt-unburned model with the fuel burning rate described by a Wiebe function is used for modeling in-cylinder combustion, and then experiments are carried out to validate the calculated data. By varying the ignition timing, the results of some characteristics such as power, torque, thermal efficiency, pressure, and heat release are obtained and compared. The results show that optimal power and torque are achieved at 31°CA before top dead center, and performance is decreased if this ignition timing is changed. It is also shown that the maximum thermal efficiency is accomplished when peak pressure occurs between 5 and 15°CA after top dead center.





Autor: A. H. Kakaee, M. H. Shojaeefard, and J. Zareei

Fuente: https://www.hindawi.com/



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