Actually the gasoline is sprayed into the intake port behind the intake
valves.

You DON'T want to heat the gas tank for a lot of reasons, not the least
of which it isn't necessary.  There have been gadgets around for years
that heat the fuel before it goes into the engine, usually marketed as a
magic gas saving device (if it worked the automakers would include it
already).

The EPA has tested some of these devices and they don't work, gadges
such as the FuelXpander; Gas Meiser I; Greer Fuel Preheater; Jacona Fuel
System; Optimizer; Russell Fuelmiser.

If you really want a engine running on vapor try an LP gas conversion,
it's well proven technology that works.

Jeff DeWitt

Suppose that you had an onboard fracturing device that would split
water into hydrogen/oxygen.  Then you wouldn't need an outside air
source and the 'gas' tank would become a water tank that you could
heat for no particular purpose except for below 0 weather.

And how would you inject this mixture into the pistons (more correctly
into the combustion chamber)  and why would you want to?  That would
make it a diesel.

Fuel injected gas engines are in lean burn and with all the controls
to regulate fuel and ignition, you are as efficient as it gets as
opposed to  a carb setup.   Combustion only occurs in the cylinders
under pressure in the presence of spark.  When the spark goes out, the
flame goes out.   Find a way to keep a spark going for the lenght of
the power stroke and see the efficiencies escalate.  Also see the
tempratures rise dramatically.

There are enuff brains out there who are looking at possible ways to
do more with less that if this were a viable idea it would be on cars
now or at least announced for cars in (?) years.