Changwei Ji and Shuofeng Wang conducted research and wrote a paper called “Effect of Hydrogen Addition on Idle Performance of a Spark-Ignited Gasoline Engine at Lean Conditions with a Fixed Spark Advance” which basically states that hydrogen supplementation for a gasoline engine increases mileage and reduces emissions.

The paper states that:

1. Under the same excess air ratio, indicated thermal efficiency of the test engine improves with the increase of hydrogen fraction.
2. At idle condition, due to the high flame speed, small ignition
energy of hydrogen, and the increased OH radical after hydrogen enrichment, the flame development and propagation durations are
shortened by the addition of hydrogen.
3. The engine lean burn limit is also extended after hydrogen
enrichment.
4. NOx emissions at idle condition are reduced by increasing hydrogen blending fraction.
5. At the lean burn limit, the engine-indicated thermal efficiency is improved, whereas CO2, CO, and NOx emissions are reduced with the increase of hydrogen enrichment level.

There you have it. Another flaw in the argument by critics debunked that hydrogen on demand technology for gasoline powered engines does actually work.

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