Hydrogen engines are a type of internal combustion engine that uses hydrogen gas as its fuel. The basic principle behind how hydrogen engines work is similar to that of other internal combustion engines: a piston is used to compress a mixture of air and hydrogen gas before igniting it with a spark plug.
However, there are some key differences between hydrogen engines and traditional petrol or diesel engines. For one, hydrogen is a much lighter gas than either petrol or diesel, so the piston doesn’t have to work as hard to compress it. This means that hydrogen engines can be more efficient than other types of internal combustion engine. Additionally, when burned, hydrogen produces very little pollution, making it a much cleaner form of energy than petrol or diesel. As a result, hydrogen engines are becoming increasingly popular in the automotive industry as a way to reduce emissions and improve fuel efficiency.