Abstract
A multi-component droplet vaporization model for multi-dimensional calculation was studied in order to simulate the behavior of fuel droplets and mixture in a port injection gasoline engine. Calculation results for a single droplet show that the evaporation process of gasoline, which consists of more than 100 components, can be simulated using a model fuel composed of at least three representative species. Subsequently, three-dimensional calculations of flow and fuel spray for an actual engine intake port configuration were performed, using the developed multi-component vaporization model. It was shown that about 70% of the high-volatility component in injected gasoline flows into the cylinder, while about 70% of the low-volatility component stays in the intake port in the injected cycle.
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