So explain how H injection doesn't work again?

[Sludgy]

There is no doubt that adding EXTERNALLY SUPPLIED hydrogen will improve mileage, and reduce emissions.

But all af the hydrogen threads I've read describe hydrogen produced ON BOARD the car from hydrolysis of water using electricity generated by the alternator. These schemes cannot reduce fuel consumption because of the energy losses in the alternator, rectifier, the electrolytic cell, and the hydrogen combustion itself.

Continuous hydrogen generation creates alternator drag on the engine and uses more energy than it creates by combustion.

On board hydrogen generation could reduce fuel usage IF AND ONLY IF it is electrolytically generated during braking, or from a thermoelectric? generator mounted on the tailpipe or other waste heat source.