Variable Mixtures of Hydrogen and Methane in the Internal Combustion Engine of a Prototype Vehicle: Regulations, Safety and Potential

Taking advantage of the multi-fuel ability of internal combustion engines, a vehicle concept is presented that combines the conventional functionality of gasoline operation with the potential for CO2-free operation with hydrogen, biogas or any mixtures of these two gases. By means of a prototype vehicle that was adapted and approved for road traffic, necessary safety measures for gas-powered vehicles are detailed, and a survey of international standards and regulations is given. An electronic gas safety system was developed allowing on-board monitoring of the condition of the gas system.