Wow! What are the consumption costs & manufacturing processes required to enable & maintain functioning?
Reyth, simple systems can be made quite cheaply but they are only suitable for supplementing the normal use of petrol. Hydrogen burns much hotter than petrol vapour. More of the petrol is consumed during combustion. Increasing the power and reducing the "WASTED" hydrocarbons.
Gas mileage of up to 200 mpg have been claimed, but around 90 mpg seems more realistic. Even overpowered gas guzzling SUV's have shown a 50% documented improvement.
Jesper, you raise a couple of valid points. Aluminium corrodes away vey quickly and is useless for long term use. High quality stainless steel works better.
If the current is too high or the electrolyte too strong the cell turns into a heater which could reach amazing temperatures if it didn't explode first. In a working system amperage, voltage and electrolyte must be carefully controlled.
The main argument against the technology revolves around "OVERUNITY". The current required to separate the gases cannot exceed the power supplied when they combine again. I think that is the 3rd law of thermodynamics. Don't hold me to that, my last Physics lesson was over 65 years ago !
What this overlooks is that every substance contains huge amounts of energy that only require the right key to release. While Hydrogen and oxygen are stable as water when they recombine huge quantities of heat are released. Far more than the amount of current required to separate them.
The main problem for this technology is CONTROL. idling, cruising accelerating and hill climbing require vastly different amounts of fuel. If you produce enough for extreme use there is much too much for idling etc. You really don't want quantities of explosive gas floating around. Especially if you are a smoker !