A Review on the Assessment of Injection Characteristics and Energy Levels for CNG and Hydrogen Gas Injectors

In today’s world, fuel injection technology is vital in the development of vehicles powered by gaseous fuel to achieve United Nation’s Sustainable Development Goal (SDG) Affordable and Clean Energy, as energy is the enabler of all other SDGs. There is a definite scope of gaseous injectors for development and testing of H₂ engine. This paper describes the procedures to select injectors for handling hydrogen fuels in SI engines and the suitability of compressed natural gas (CNG) injector for using hydrogen fuel. The selection of injectors for introducing gaseous fuel depends on the parameters such as duty cycle and pulse width of the injector. The calculation for injector pulse width and injector flow/spray for determining the engine performance also discussed. The final calculated results are validated with experimental results, as well as engine performance parameters, which are within 10 % of the calculated results. This manuscript suggests a quick, efficient, and economical method for the selection of injectors and testing of gas powered engines. The accurate metering of hydrogen fuel is essential for the best performance of hydrogen powered engines. The literature for the proper selection of injectors to test the hydrogen engine needs to be reviewed and compiled to build a guide for the selection of gaseous injectors for hydrogen testing. The testing of readily available CNG injectors revealed that CNG injector is suitable for hydrogen powered engines.