Applying the multi-zone model in predicting the operating range of HCCI engines

Jia, Ming, Xie, Maozhao and Peng, Zhijun (2010) Applying the multi-zone model in predicting the operating range of HCCI engines. Frontiers of Energy and Power Engineering in China, 4 (3). pp. 414-423. ISSN 1673-7393

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Abstract

In this paper, a multi-zone model is developed to predict the operating range of homogeneous charge compression ignition (HCCI) engines. The boundaries of the operating range were determined by knock (presented by ringing intensity), partial burn (presented by combustion efficiency), and cycle-to-cycle variations (presented by the sensitivity of indicated mean effective pressure to initial temperature). By simulating an HCCI engine fueled with iso-octane, the knock and cycle-to-cycle variations predicted by the model showed satisfactory agreement with measurements made under different initial temperatures and equivalence ratios; the operating range was also well reproduced by the model. Furthermore, the model was applied to predict the operating range of the HCCI engine under different engine speeds by varying the intake temperatures and equivalence ratios. The potential to extend the operating range of the HCCI engine through two strategies, i. e., variable compression ratio and intake pressure boosting, was then investigated. Results indicate that the ignition point can be efficiently controlled by varying the compression ratio. A low load range can be extended by increasing the intake temperature while reducing the compression ratio. Higher intake temperatures and lower compression ratios can also extend the high load range. Boosting intake pressure is helpful in controlling the combustion of the HCCI engine, resulting in an extended high load range. © 2010 Higher Education Press and Springer-Verlag Berlin Heidelberg.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: Jun Peng
Date Deposited: 06 Feb 2012 20:47
Last Modified: 02 Apr 2012 14:16
URI: http://sro.sussex.ac.uk/id/eprint/28155
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