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:

  • Affect AFR

  • Increase combustion temperature

  • Place load on the engine


Conclusion

A small amount of hydrogen:

  • Speeds up the combustion

  • Eliminates incomplete burning

  • Enables the engine to do the same work with less fuel

Hydrogen’swide flammability range is the main reason why even minimal amounts produce significant fuel savings.