Numerical Analysis on the Effect of Fuel Injection Timing on Auto-Ignition of an Ethanol Spray in a Rapid Compression and Expansion Machine
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Abstract
This study deals with the development of controlled-ignition technology for high performance CI (Compression Ignition) alcohol engines. In our previous numerical analysis, it is concluded that fuel injection timing is one of the most important factors for the control of auto-ignition of an ethanol spray. We numerically investigated the effect of fuel injection timing on auto-ignition quality of an ethanol spray in a rapid compression and expansion machine (RCEM) by using the commercial CFD code “CONVERGE”. Results showed that it was possible to control the auto-ignition timing of an ethanol spray in the RCEM by the adjustment of fuel injection timing. In addition, heat release patterns after auto-ignition of a fuel spray similar to the conventional DI (Direct Injection) diesel engines was numerically indicated even for ethanol direct injection by the precise control of fuel injection timing. Totally judged from the results described the above, this study showed the feasibility of diesel engine operation fueled by neat ethanol by the control of fuel injection timing.
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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
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