Thermodynamic Analysis of an Over-Expanded Engine
| Autor: | Bernardo Sousa Ribeiro, Jorge Martins, Krisztina Uzuneanu, Ondrej Jasasky |
|---|---|
| Přispěvatelé: | Universidade do Minho |
| Rok vydání: | 2004 |
| Předmět: |
Miller cycle
Chemistry 020209 energy Mechanical engineering 02 engineering and technology Diesel cycle 7. Clean energy 020303 mechanical engineering & transports 0203 mechanical engineering Internal combustion engine Engine efficiency Thermodynamic cycle Atkinson cycle 0202 electrical engineering electronic engineering information engineering Otto cycle Lenoir cycle |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 0148-7191 |
| DOI: | 10.4271/2004-01-0617 |
| Popis: | When the exhaust valve of a conventional spark ignition engine opens at the end of the expansion stroke, a large quantity of high pressure exhaust gas is freed to the atmosphere, without using its availability. An engine that could use this lost energy should have a better efficiency. The equations for an over-expanded cycle (Miller cycle) are developed in this paper, together with equations for the Otto cycle, diesel cycle and dual cycle, all at part load, so they can be compared. Furthermore, indicated cycle thermodynamical comparisons of a S.I. engine at part load (Otto cycle at half load), a S.I. engine at WOT (with half displacement) and two over-expanded S.I. engines (with different compression strokes) are examined and compared, with the aim of extending the referred theoretical cycle comparisons. Fundação para a Ciência e a Tecnologia (FCT) Fundo Social Europeu (FSE) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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