1) In the process of the engine intake, hydrogen gas is sucked into the engine.

   a. Hydrogen gas is very light, quickly spread to the engine the engine compartment.
   b. Hydrogen also has a nice feature, is the adhesion, always attached to the wall of the engine compartment, where they are the most carbon place.
   c. Hydrogen also has a feature that is penetration, due to molecular hydrogen is small, can quickly penetrate into the surface layer of coke.

2) The engine fuel injection
3) The engine ignition

a. first stage: oil, air, attached to the carbon surface hydrogen, oxygen is ignited, produces carbon oxides (mainly carbon dioxide), nitrogen oxides, high-temperature steam and hydrogen ion group and the like.

b. The second stage: water vapor, carbon hydroxide ions corporations and high temperature water gas shift reaction occurs, attached with hydroxyl ions are oxidized to carbon monoxide and further oxidized to carbon dioxide.

4) The engine compression work.

5) exhaust: soot in the gas way through the exhaust system.

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