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A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Mechanical Engineering
2014
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| _version_ | 1867613304330911744 |
|---|---|
| access_status_str | Open Access |
| author | Londleni, Sibusiso C |
| author2 | Swarts, André |
| author_browse | Londleni, Sibusiso C Swarts, André |
| author_facet | Swarts, André Londleni, Sibusiso C |
| author_sort | Londleni, Sibusiso C |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/5517 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:34:00.978Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Mechanical Engineering |
| publisherStr | Department of Mechanical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/5517 A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines Londleni, Sibusiso C Swarts, André Yates, Andrew Mechanical Engineering Includes bibliographical references. Homogeneous Charge Compression Ignition (HCCI) is an alternative internal combustion (IC) engine that can provide high efficiencies while producing ultra-low nitrous oxides (NOx) and particulate matter (PM) emissions compared to existing compression ignition (CI) and spark ignition (SI) engines. HCCI engines operate on the principle of having a dilute, premixed charge that reacts and burns volumetrically throughout the cylinder as it is compressed by the piston. The large amounts of charge dilution also dramatically reduce the peak burned gas temperatures resulting in low NOx emissions. Since there is no fuel-rich diffusion burning taking place, the PM emissions are at near zero levels. In theory, HCCI combustion can be achieved with any fuel that evaporates readily and autoignite under the conditions typically found in an internal combustion engine. In some regards, HCCI incorporates the best features of both SI and CI engine. As in a SI engine, the charge is well mixed, which minimises particulate emissions and as in a CI engine, the charge is compression ignited and has no throttling losses, which leads to high thermal efficiencies. However, unlike either of these conventional engines, the combustion occurs simultaneously throughout the combustion chamber without a flame front, eliminating the flammability limits associated with SI combustion. The HCCI engine can provide efficiencies as high as compression ignition engines while generating extremely low NOx emissions, as low as 1-5% tailpipe NOx of a conventional SI engine. 2014-07-31T11:21:07Z 2014-07-31T11:21:07Z 2006 Master Thesis Masters MSc http://hdl.handle.net/11427/5517 eng application/pdf Department of Mechanical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Mechanical Engineering Londleni, Sibusiso C A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines |
| thesis_degree_str | Master's |
| title | A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines |
| title_full | A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines |
| title_fullStr | A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines |
| title_full_unstemmed | A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines |
| title_short | A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines |
| title_sort | theoretical assessment of fuel combustion attributes to enhance the operational envelope of hcci engines |
| topic | Mechanical Engineering |
| url | http://hdl.handle.net/11427/5517 |
| work_keys_str_mv | AT londlenisibusisoc atheoreticalassessmentoffuelcombustionattributestoenhancetheoperationalenvelopeofhcciengines AT londlenisibusisoc theoreticalassessmentoffuelcombustionattributestoenhancetheoperationalenvelopeofhcciengines |