Ty, it's long since buried in another thread, but the invention is real and it works and a company bought the rights to produce it, then found a major drawback that made it unsellable. Basically that after using the fumes to power the car, it reduced the remaining gasoline to a hydrocarbon sludge.
Well, that could make sense where it wasn't necessarily killed because of phenomenal mileage but rather some other technical hurdle. That would be similar to Cower's cam... He figured that after the power stroke, and then the exhaust stroke, they would go into a second "power" stroke but instead of injecting fuel, it would inject water which, using the waste heat generated by the fueled power stroke, would flash to steam (water flashes to steam at a 1,600 to 1 ratio). It then goes into another exhaust stroke but this one sends the steam along another path. Here is a link.
http://www.damninteresting.com/the-six-stroke-engine/
Anyway, they must have run into some trouble with heat expansion or something because two power strokes where one is "free" would be fabulous. He said that this method reduces/eliminates the need for a radiator and cooling system.
Another case where the cons outweigh the pros.