[mpgx2]

Folks,

I've given this topic a bit more thought.

For instance, using a CNG/LPG bottle to store the steam.

It's easy to boil water and generate steam in a vacuum.

Using the hybrid principle, you make steam under acceleration
when you are fueling the engine, by a boiler system on
the exhaust manifold.

You pump/capture the steam in a CNG/LPG storage bottle
made for high pressure.

At traffic lights, idle, whenever you want, you pump the
captured steam back into the inlet manifold.

Now, see the problem?

Where will the steam go?

Not into the cylinder, but out your inlet manifold and
blow your air-filter onto the road - lol.

The showstopper to me seams to be that the ICE
draws air in by induction.

Unless you do really heavy engineering on your inlet
manifold to stop the steam 'going-the-wrong' way
then it just will never work.

Apart from that, the idea is good.