Hydrogen Combustion Engine

CMB.TECH has developed a dual fuel hydrogen technology.

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The principle of the technology is presented in the following 5 steps.

Step 1:

Hydrogen is injected in the aspirated air during the intake stroke.

Step 2:

During the compression stroke Hydrogen mixes into a homogeneous mix.


A small amount of diesel pilot fuel is injected into the combustion chamber just before top dead centre.

Step 4:

Diesel auto-ignites due to the high temperature and pressure and co-combusts with all the hydrogen, forcing the piston down during the power stroke.

Step 5:

The cylinder is cleaned during the exhaust stroke. Due to hydrogen co-combustion, the NOx and CO2 emissions have strongly reduced in the exhaust gases.


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