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Understanding HCCI characteristics in mini-HCCI engines
Includes abstract.
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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_ | 1867613203814416384 |
|---|---|
| access_status_str | Open Access |
| author | Collair, Kyle |
| author2 | Floweday, Gareth |
| author_browse | Collair, Kyle Floweday, Gareth |
| author_facet | Floweday, Gareth Collair, Kyle |
| author_sort | Collair, Kyle |
| collection | Thesis |
| description | Includes abstract. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/5567 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:24.523Z |
| 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:11427/5567 Understanding HCCI characteristics in mini-HCCI engines Collair, Kyle Floweday, Gareth Yates, Andy Mechanical Engineering Includes abstract. Includes bibliographical references. This study examines the successful use of Homogeneous-Charge, Compression-Ignition (HCCI) combustion in a standard issue model-aero “diesel” engine. This two-stroke engine, unlike the more common glow-plug versions, operates without any form of combustion initiator. The fuel and air are premixed using a simple carburettor and ignited by piston compression only. The engine therefore operates in HCCI-mode even though it is referred to as a “model diesel engine”. Of particular interest is the fact that the engine is easily started from cold, warm and hot conditions. It runs stably from idle to over 11000rpm and is shown to run at high load points across the speed range with extremely conservative pressure rise rates. Furthermore, this engine is shown not to exhibit any knocking (high pressure oscillations) within its normal range of operation. The speed-load operational envelope of the engine is mapped out using a range of propellers and a propeller speed-load calibration rig. Air/fuel ratio, inlet air and exhaust gas temperatures are examined within this operational envelope. Areas of unstable operation and extremities in stable operation are also mapped out and discussed. The engine’s use of inlet throttling, crankcase pumping and residual exhaust gas metering is modelled and discussed. In addition, the engine’s inherent ability to maintain constant combustion phasing over varying operating conditions is also investigated. 2014-07-31T11:30:24Z 2014-07-31T11:30:24Z 2008 Master Thesis Masters MSc http://hdl.handle.net/11427/5567 eng application/pdf Department of Mechanical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Mechanical Engineering Collair, Kyle Understanding HCCI characteristics in mini-HCCI engines |
| thesis_degree_str | Master's |
| title | Understanding HCCI characteristics in mini-HCCI engines |
| title_full | Understanding HCCI characteristics in mini-HCCI engines |
| title_fullStr | Understanding HCCI characteristics in mini-HCCI engines |
| title_full_unstemmed | Understanding HCCI characteristics in mini-HCCI engines |
| title_short | Understanding HCCI characteristics in mini-HCCI engines |
| title_sort | understanding hcci characteristics in mini hcci engines |
| topic | Mechanical Engineering |
| url | http://hdl.handle.net/11427/5567 |
| work_keys_str_mv | AT collairkyle understandinghccicharacteristicsinminihcciengines |