Abstract
An experimental study was made of the fuel droplet behavior in the combustion chamber of an automotive spark ignition engine. The mixture formation during the intake stroke was simulated by the intermittent injection of gasoline into a steady flow of air through an intake port. The spatial distribution of the size and number of droplets was measured by applying the laser Mie scattering technique. The results showed that both the intake air flow rate and the intake valve lift did not give and appreciable influence of the Sauter mean diameter of the fuel droplets. The fuel supply from two different types of injectors almost caused the same size of droplets. It was also found that the location for fuel injection was one of the important factors affecting the droplet size. The total quantity of fuel droplets increased with and increased with an increase of the intake valve lift.
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