Has Anyone tried an HHO combustion supplementer in their auto?

Question

What was you vehicle and observed mpg change?

How dangerous is it?

How can a measly 50 to 100 Watts make the sort of claims of improvement that one hears about, which range all over the place from 25 pct to 50 pct to even 70 pct that you see posted all over.

To my understanding, if even 10 pct of the combustion is incomplete (pre catalytic converter) then your car is old, crappy, and stinky, and would in no way pass smog check.

Answer 1

True, your catalytic converter is there to burn on unused gasoline, and break down NOx and CO to less harmful gases. However the addition of hydrogen to the combustion chamber, makes the burn more efficient. As quoted in the link below, "Adding hydrogen gas to the homogeneous fuel charge improves the ignitability of the mixture, and increases flame speed and combustion stability."

If you can make the combustion cleaner, we might not even need catalytic converters in the future. Remember a catalytic converter is only good when it's hot, which takes 5-10 minutes of driving time. For a lot of people doing short commutes, the catalytic converter hardly does a thing.

How dangerous is it? we're talking quite small amounts of hydrogen, and the HHO assist that comes from electrolyzing water, holds only a small amount of hydrogen in a jar. It's not like your storing a large bag of it (because that could be quite explosive) or carrying a compressed cylinder of it under your seat (some semi rigs inject propane into the diesel). It depends also on how quickly you're producing the hydrogen, and the downsides are the length of time the electrodes last and how often you have to change out the water/electrolyte mixture (I think once a week is normal).

There are claims of 20-300% increase in gas mileage. These are all using different HHO generators and other gadgets that change your oxygen sensor reading, or preheat the hydrogen, etc.

As for the smog check, that's being measured after the catalytic converter and a good converter at temperature will burn up a lot of gas.