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Permanent link (DOI): https://doi.org/10.7939/R38K9M

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SI - HCCI mode switching optimization using a physics based model Open Access

Descriptions

Other title
Subject/Keyword
Sensitivity
Optimization
HCCI
Engines
Mode-switch
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Schleppe, Michael N
Supervisor and department
Koch, C Robert (Mechanical Engineering)
Examining committee member and department
Prasad, Vinay (Chemical and Materials Engineering)
Koch, C Robert (Mechanical Engineering)
Checkel, M David (Mechanical Engineering)
Olfert, Jason (Mechanical Engineering)
Department
Department of Mechanical Engineering
Specialization

Date accepted
2011-09-21T22:34:49Z
Graduation date
2011-11
Degree
Master of Science
Degree level
Master's
Abstract
High efficiency and low NOx emissions make Homogeneous Charge Compression Ignition (HCCI) promising for use in internal combustion engines. Combining HCCI with Spark Ignition (SI) allows for extension of the engine’s operating range. A Physics-based Mode Switch Model (PMSM) of SI-HCCI mode switches has been developed, which combines a single zone physics-based SI model with a single zone detailed chemistry HCCI model. The PMSM predicts the shape of IMEP and CA50 SI-HCCI mode switch responses for a single cylinder natural gas engine. Sensitivities of work output and combustion timing are calculated with respect to input variables and model parameters. A mode switch profile allowing SI-HCCI mode switches while holding engine torque constant is achieved using an optimization process that considers only conventional actuators of intake pressure and fuel injector pulse width. A similar optimization process is used to further improve mode switches using intake temperature adjustment.
Language
English
DOI
doi:10.7939/R38K9M
Rights
License granted by Michael Schleppe (michael.schleppe@ualberta.ca) on 2011-09-16T15:11:27Z (GMT): 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 the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein 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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