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Permanent link (DOI): https://doi.org/10.7939/R3PG8X

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Modeling and experimental study of an HCCI engine for combustion timing control Open Access

Descriptions

Other title
Subject/Keyword
Modeling
Combustion engines
HCCI
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Shahbakhti, Mahdi
Supervisor and department
Koch, Charles Robert (Mechanical Engineering)
Examining committee member and department
Wallace, James S. (Mechanical Engineering, University of Toronto)
Checkel, M. David (Mechanical Engineering)
Fahimi, Farbod (Mechanical Engineering)
Huang, Biao (Chemical Engineering)
Olfert, Jason (Mechanical Engineering)
Department
Department of Mechanical Engineering
Specialization

Date accepted
2009-10-01T15:56:49Z
Graduation date
2009-11
Degree
Doctor of Philosophy
Degree level
Doctoral
Abstract
Homogeneous Charge Compression Ignition (HCCI) is a promising method for combustion engines to provide a substantial reduction in fuel consumption and formation of both nitrogen oxides and soot pollutants in automotive and stationary engines. Control of HCCI combustion timing is essential for the successful integration of the HCCI concept in real applications. This thesis concentrates on control oriented modeling and experimental study of HCCI combustion for control of ignition timing in HCCI engines. A detailed experimental study of HCCI with over 600 operating points on two different engines is done to characterize the complex relationship among the engine variables, the ignition timing and the exhaust temperature. This leads to identifying regions with distinct patterns of cyclic variation for HCCI ignition timing. In addition, main influential factors on the variations of ignition timing and exhaust temperature in HCCI engines are determined. A dynamic full-cycle physics based Control Oriented Model(COM) is derived from using the experimental data and simulations from an HCCI thermo-kinetic model. The COM is validated with a large number of transient and steady-state experimental points. The validation results show that the COM captures the key HCCI dynamics with a high degree of accuracy for control applications. The COM is computationally efficient and all inputs of the model can be readily measured or estimated on a real engine. This makes the COM simple and fast enough for use as an off-line simulation bed to design and evaluate different strategies for physics-based control of combustion timing in HCCI engines.
Language
English
DOI
doi:10.7939/R3PG8X
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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