FAQ
How does a small amount of hydrogen provide 20–25% fuel savings?
The fuel savings do not come from theamount of hydrogen, but from the way hydrogenchanges and improves the combustion process.
The key technical advantage of hydrogen is this:
Hydrogen can ignite and burn efficiently over amuch wider flammability range compared to other fuels.
To understand this clearly, compare the flammability limits of different fuels:
Flammability Range Comparison (by Volume in Air)
| Fuel | Flammability Range |
|---|
| Hydrogen (H₂) | 4% – 75% (very wide) |
| Gasoline vapor | 1.4% – 7.6% |
| LPG | 2.1% – 9.5% |
| Diesel vapor | 0.6% – 7.5% |
What does this mean?
Hydrogen:
✔ Can burn even in very lean mixtures
✔ Has a flame speed 8–10 times faster than gasoline
✔ Requires extremely low ignition energy
✔ Completes combustion efficiently
✔ Eliminates incomplete burning
Because of these properties,even a very small amount of hydrogen has a major influence on the combustion process.
????What Happens Inside the Engine?
Normally in internal combustion engines:
A portion of the fuel burns late
Some of it does not burn at all
This results in energy loss
Hydrogen changes this:
Combustion becomes faster
Combustion duration becomes shorter
The fuel burns more completely
As a result:
➤ The engine requiresless fuel to produce the same power
➤ Fuel savings reach20–25%
In other words, the savings come fromhigher combustion efficiency, not from hydrogen’s own energy content.
????Additional Note: Why HHO does not disrupt the air–fuel mixture (AFR)?
Engine air intake:5,000–8,000 L/min
HHO flow rate:100–300 mL/min
Contribution of HHO to the mixture:
➡0.003% – 0.005%
This level is far too low to:
Conclusion
A small amount of hydrogen:
Hydrogen’swide flammability range is the main reason why even minimal amounts produce significant fuel savings.