INJECTOR ROLE

The injector has been shown to have a large role in the engine performance. The characteristics of the injector in terms of how much pressure it can handle and the size of the nozzle are directly linked to how good the injection is and how it mixes but also how the injection quantity is controlled. Thus, the design of the injectors affects how large the heat loss is at the cylinder walls and the efficiency with it, thus also the fuel consumption.^[1]

What has also come to light is that the hydrogen gas has an embrittlement effect on certain metal alloys, which can become a problem during long-term use.

Further obstacles that must be overcome are for example, how to handle hydrogen's high diffusivity capability which allows it to pass through several types of different material.

The injectors, for example, may be exposed to the hydrogen, which can then lead to the function being impaired or perhaps completely absent.

A prerequisite for the development of hydrogen as a fuel in internal combustion engines is that one focuses on the problems one has, for example, with different materials that can cope with hydrogen's different properties. The high pressures used in some of the systems previously presented. The design of the gas lines and that you can seal in a safe way in all the connections between different components. How fuel tanks are designed and a construction on them that ensures absolute tightness. That the injectors are designed specifically for hydrogen gas, today we use a lot of injectors that are actually intended for other types of gasses, CNG, LPG or BIO- gas. But development is constantly moving forward and what is written today may be history tomorrow.