Well, the discussion certainly provoked a number of additional questions with me.
In carbureted engines we always worry (perhaps too much) about carb ice. Carb ice,
AFAIK, occurs because of two things:
a. The pressure drop behind the throttle butterfly.
b. The evaporation of fuel.
An injected engine has a throttle butterfly and I assume the fuel that is injected in the injection chamber (in neat or atomized form) will evaporate too, to a certain extent, before it gets into the cylinders properly. So why then is there no chance of icing in a fuel-injected system?
And about these injection chambers. Do these have a special shape, for instance incorporating a venturi, so that the fuel that is injected (neat or atomized) is actually evaporated before getting into the cylinders, or does the fuel essentially enter the cylinders in vapor/atomized form?