The behavior of liquid fuel droplets and the liquid fuel film within an intake manifold is studied.
By considering the simultaneous processes of evaporation and acceleration of fuel droplets in an ongoing air stream, the deposition rate of the fuel droplets and their evaporation in an intake manifold is predicted.
The fuel droplets deposited on the wall of an intake manifold become a liquid film flow. The behavior of the liquid flow is studied to determine the thickness and velocity of the film. A time constant describing the delay of fuel flow due to the liquid film is also determined.