Talking about hydrogen powered car, there are two technologies: hydrogen fuel cell electric vehicles (FCEVs) and there is hydrogen internal combustion engines (H2ICE).
FCEVs generate electricity from hydrogen in a device known as a fuel cell that is used to power the electric motor, whereas H2ICE burn hydrogen in an internal combustion engine.
Engineers at JCB Power Systems have developed the first hydrogen engine in the industry. Using and adapting established engine technology with readily available components, hydrogen is combusted and energy delivered in exactly the same way as a diesel engine.
JCB claims the technology is less complicated than hydrogen fuel cell technology. Only steam emitted from the tailpipe and zero CO2 at point of use.