Gasoline Partially Premixed Combustion (PPC) was investigated in a single cylinder optical diesel engine. The PPC operation was achieved with a combination of high dilution and higher intake charge temperature at part-load conditions using Primary Reference Fuel (PRF). The relative air/fuel ratio (λ) was set to 2.3 and the EGR rate at 22%. Split injections of three fuel distribution strategies (50:50, 70:30 and 30:70) were studied. In addition, the effect of injection pressure (900 and 1200 bar) was investigated for each injection timing. The emission and performance of the gasoline PPC operations were then compared with those of the baseline diesel combustion operation. Based on the thermodynamic analysis of the engine performance, detailed in-cylinder studies were carried out by means of optical techniques. The high speed imaging technique was employed to observe the fuel spray development and combustion processes. A simultaneous Mie-LIF technique was then developed and utilized for the visualization of fuel liquid and vapour formation.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:642444 |
| Date | January 2014 |
| Creators | Lu, Pin |
| Publisher | Brunel University |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://bura.brunel.ac.uk/handle/2438/10463 |
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