International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Hydrogen has a good environmental performance, high energy characteristics, high burning rate and low ignition temperature. In case of using hydrogen as a primary fuel in an internal combustion engine, there is a drop in power and detonation combustion at high load modes, so hydrogen is best used in a composition with the primary fuel.
In the mode of partial load, the hydrogen content in the fuel mixture decreases, and it should decrease as the load increases, and in the mode of full load, its amount is minimal, which will allow us to maintain the power characteristics, otherwise the power will decline. The main thing is to know in which mode what should be the ratio of hydrogen and the primary fuel, which ensures the normal flow of the operation process, which will result in primary fuel economy and reducing the toxicity of exhaust gases.
Based on the studies conducted, we can conclude that it is preferable for the engine to work with a high content of hydrogen in the fuel
mixture at no load and at light loads, its concentration should decrease as the load increases.

Normally, maritime, air and surface transport assets powered by internal combustion engines are the major sources of chemical, biological and physical pollution of the environment. In the meantime, oil shortage and world oil prices are rising every year, which raises questions on the use of alternative energy sources that are not fossil fuels.
At the present time, natural gas as one of the types of fuel is widely and successfully used in surface transport owing to the availability of their sufficient reserves and good thermophysical characteristics. The article deals with the prospects for natural gas production in the sea and the possibilities of utilizing its energy source in small-capacity marine and river transport equipment in both diesel-cycle and directly converted to natural gas-powered diesel engines.