There's a loss of energy, taken from the flywheel.

yep , like the other three strokes in a ice engine.

wonder why they work?

and to think that they only have 1/3 the explosive force that moves the piston by using such a low grade fuel as gasoline.

just think it could also double as a furnace because theres no heat being wasted out of an exhaust pipe !!!

hmmm...water heaters , Ive also noticed that by placing a vacume on hot water the bubbles form
much more rapidly , maybe the heated water would help the HHO out a little.

and of course you failed to mention that in a vacuum the HHO would be generated much more rapidly
so the piston wouldnt be making much of a vacuum as it moves out.

as the vacuum would be filling very rapidly with HHO.

It doesn't clearly work until you add up all the energies.

I agree

3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.