Variable mixtures of hydrogen and methane in the internal combustion engine of a prototype vehicle: regulations, safety and potential

Mixtures of hydrogen and methane in the internal combustion engine – Synergies, potential and regulations

“…In the case of stoichiometric combustion, a hydrogen powered engine could even reach nearly 20% more full load power than the gasoline engine. For internal mixture formation high injection pressures above 100 bar will be necessary [5].…”

“…Apart from a variety of fixed mixture ratios of H 2 und CH 4 , also a flex-fuel concept was presented. A prototype car that still has its original functionality of gasoline as well as natural gas operation was additionally adapted for hydrogen and H 2 NG [3,5]. The concept car is designed to run on pure hydrogen, on pure methane and on any mixture of hydrogen and methane i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 3 7 ( 2 0 1 2 ) 1 1 5 3 1 e1 1 5 4 0 (flex-fuel H 2 NG) in the same gas system.…”

“…Thus this presents a bridging technology that combines the conventional functionality with the option to run on hydrogen without CO 2 -emissions. The hydrogen for this vehicle is produced by electrolysis, using electricity from water power, see [3,5]. A number of modifications regarding the engine as well as the vehicle were necessary.…”