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In-cylinder air flow structures are known to play a major role in mixture preparation and engine operating limits for spark-ignition engines. In this paper PIV measurements were undertaken in an optical spark-ignition at 1500RPM, part-load with 0.5bar intake plenum pressure. One of the PIV planes was vertical, cutting through the centrally located spark plug (tumble plane). The other plane was horizontal...
Particulate formation due to combustion of a wide range of ethanol-gasoline blends were investigated in an internal combustion engine. The engine used for this study is a single-cylinder research engine, the architecture of which is representative of a modern spark ignited direct injected (SIDI) engine. Instead of direct injection, the engine was fueled using a premixed prevaporized (PMPV) mode, which...
Characteristics of free and impingement spray fueled with methanol, ethanol, isooctane, toluene reference fuels (TRF) and gasoline were investigated by using a Phase Doppler Anemometry (PDA) system with a direct injection gasoline injector. Results show that all these fuels performed a similar impingement process: a large fraction of incoming droplets adhered to the wall because of the stick and spread...
In the development of downsizing and high efficiency spark ignition (SI) engine, overcoming the knock is crucial. One method to suppress knock is to use with high octane number fuels as additives. However, in the current pre-blended fuel such as E10, the blending ratio cannot be varied with the engine operation conditions. The novel ethanol direct injection plus gasoline port injection (EDI+GPI) provides...
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