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The recommissioning and upgrade of a Ricardo Hydra research engine.
Thesis (MEng)--Stellenbosch University, 2021.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2021
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| _version_ | 1867613929911353344 |
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| access_status_str | Open Access |
| author | Nieftagodien, R. |
| author2 | Haines, R. W. |
| author_browse | Haines, R. W. Nieftagodien, R. |
| author_facet | Haines, R. W. Nieftagodien, R. |
| author_sort | Nieftagodien, R. |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng)--Stellenbosch University, 2021. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/123860 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:43:57.787Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/123860 The recommissioning and upgrade of a Ricardo Hydra research engine. Nieftagodien, R. Haines, R. W. Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. Combustion Testing laboratories -- Fuels Internal combustion engines Engine -- Control systems -- Testing UCTD Thesis (MEng)--Stellenbosch University, 2021. ENGLISH ABSTRACT: This thesis details the commissioning and upgrade of a Ricardo Hydra single cylinder research engine test bed and the baseline testing performed. The aim of recommissioning this test bed was to produce a new test platform to augment the Internal Combustion Engine Laboratory fuels testing capabilities. Upgrades were performed on the electronics to produce a modern engine test bed control system. The engine was refurbished and rebuilt, and the inlet and exhaust manifolds, and the cooling system were redesigned. For the commissioning tests, the engine was run at various load points. The test data as well as the effectiveness of the control systems were analysed. During these commissioning tests, the engine control unit was mapped and a pressure indicating system was installed to capture in-cylinder pressure. Using in-cylinder pressure data as input, a zero dimensional, single zone, heat release model was developed using first principles to analyse the combustion data. The effect of the location of the in-cylinder pressure transducer was also evaluated. Once the test bed was fully commissioned, the engine was run at four load points using 95 ULP fuel, optimal ignition timing and stoichiometric air fuel ratio. This produced a baseline set of results for the engine’s performance, which provided data for the evaluation of the heat release model. The en- gine’s performance and heat release model was compared to simulated results obtained by modelling the engine using Lotus Engine Simulation software. The engine’s response to ignition timing and air fuel ratio changes was also evaluated. Thereafter, six fuels were tested at low speed, high load conditions. Four of the fuels were ULP fuels with varying octane numbers and the remaining two were ethanol and toluene based primary reference fuel (PRF) blends. The results of these fuels tests were analysed using the heat release model. Concluding the test programme, the knock resistance of the tests fuel was established, by using in-cylinder pressure measurement. Spark knock was in- duced by advancing the ignition timing until knock limited spark advance was found for low speed, high load conditions. The ignition timing was further advanced to evaluate the change in knock intensity with spark advance. The results were processed through a knock algorithm and analysed. AFRIKAANSE OPSOMMING: Hierdie tesis spesifiseer die herbediening en opgradering van ’n Ricardo Hydra enkel silinder navorsingsenjin toetsbed en noteer die uitkomste van die basislyn toetse. Die mikpunt van die herbediening van die toetsbed was om ’n nuwe toets platform te produseer om die Interne Verbrandingsmotor Labratorium se brandstof toetsing aan te vul. Opgraderings op die elektronika was uitgevoer om ’n meer moderne enjin toetsbed kontrole stelsel te produseer. Die enjin was opgeknap en herbou. Die inlaat en uitlaat struitstukke en die verkoelingstelsel was ook herontwerp. Die enjin was teen verskillende ladingspunte getoets vir die goedkeuringstoetse. Die toetsdata sowel as die effektiwiteit van die kontrole stelsels was geanaliseer. Gedurende die goedkeuringstoetse was die enjin kontrole eenheid gekarteer en ’n drukaanduiding stelsel was geinstaleer om die in-silinder druk op te vang. Met die gebruik van in-silinder druk data as inset, was ’n zero dimensie, enkel zone hitte vrystellingsmodel ontwikkel deur middel van eerste beginsels om die verbrandingsdata te analiseer. Die effek van die ligging op die in-silinder druk sensor was ook geevalueer. Toe die toetsbed tenvolle goedgekeur was, was die enjin getoets met 95 ULP brandstof, optimale ontsteking tydsberekening en stoichiometriese lug brand- stof ratio teen vier ladingspunte. Hierdie het die basislyn resultate vir die enjin se werkverrigting geproduseer wat die data voorsien het vir die evaluasie vir die hitte vrystellingsmodel. Die enjin se werkverrigting en hitte vrystellings model was vergelyk met soortgelyke resultate wat verkry was deur die modellering van die enjin deur die gebruik van Lotus Enjin Similasie sagteware. Die enjin se reaksie op ontstekings tydsberekening en lug brandstof ratio veranderinge was ook geevalueer. Daarna was ses verskillende brandstowwe getoets teen lae spoed, hoë lading toestande. Vier van die brandstowwe was ULP brandstowwe met ’n verskei- denheid oktaan vlakke en die oorblywende twee brandstowwe was ethanol en toluene gebaseerde PRF mengsels. Die resultate van die brandstof toetse was geanaliseer via die hitte vrystellings model. Die toetsprogram was voltooi deur die klop weerstand van die toets brand- stowwe te bepaal deur in-silinder drukmeting. Vonk-klop was aangespoor deur die ontsteking tydsberekening te bevorder totdat die klop beperkte vonkvoor- skot gevind was vir ’n lae spoed, hoë lading kondisies. Die ontsteking tydsbe- rekening was verder bevorder om die verandering in klop intensiteit met vonk bevordering te evalueer. Die resultate was deur ’n klop algoritme verwek en geanaliseer. Masters 2021-11-30T21:12:55Z 2021-12-22T14:25:36Z 2021-11-30T21:12:55Z 2021-12-22T14:25:36Z 2021-12 Thesis http://hdl.handle.net/10019.1/123860 en_ZA Stellenbosch University application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Combustion Testing laboratories -- Fuels Internal combustion engines Engine -- Control systems -- Testing UCTD Nieftagodien, R. The recommissioning and upgrade of a Ricardo Hydra research engine. |
| title | The recommissioning and upgrade of a Ricardo Hydra research engine. |
| title_full | The recommissioning and upgrade of a Ricardo Hydra research engine. |
| title_fullStr | The recommissioning and upgrade of a Ricardo Hydra research engine. |
| title_full_unstemmed | The recommissioning and upgrade of a Ricardo Hydra research engine. |
| title_short | The recommissioning and upgrade of a Ricardo Hydra research engine. |
| title_sort | recommissioning and upgrade of a ricardo hydra research engine |
| topic | Combustion Testing laboratories -- Fuels Internal combustion engines Engine -- Control systems -- Testing UCTD |
| url | http://hdl.handle.net/10019.1/123860 |
| work_keys_str_mv | AT nieftagodienr therecommissioningandupgradeofaricardohydraresearchengine AT nieftagodienr recommissioningandupgradeofaricardohydraresearchengine |