Research Information System
Energies, vol.18, no.7, 2025 (SCI-Expanded, Scopus)
With the growing trend towards the electrification of transport, it is anticipated that internal combustion engines will continue to play an important role in the production of electricity for electricity systems or the direct propulsion of vehicles. However, these engines are under considerable pressure to achieve carbon neutrality, making zero-emission fuels a key solution. One solution is the use of hydrogen, which is an extremely clean and carbon-free fuel whose combustion product is only water. The paper also introduces the KEYOU concept, which involves switching from burning propellant oil to a supercharged, lean-burn, hydrogen-fueled ignition engine. The authors provide a study on the selected issues based on 113 reviewed literature sources and highlight the achievements and potential of hydrogen engines. Based on the achievements described, the paper provides a comprehensive overview of the impact of hydrogen engines in reducing emissions as well as supporting the sustainable development of transport systems. The literature research conducted highlights hydrogen as an important solution for decarbonizing internal combustion engines and moving towards an emission-free future.