Abstract
Abstract
In view of the ever more stringent exhaust gas regulations, attention is turned to new or improved engine technology and new fuels. Alternative gaseous fuels such as natural gas and hydrogen offer the potential of very clean emissions. Even more interesting is the reduction of CO2 emissions, widely held responsible for the global warming of the planet. The author is conducting a study on a single cylinder research engine in order to critically assess the emission potential of alternative fuels. Hydrogen and methane are compared in terms of power production, fuel consumption and emissions. The engine parameters (ignition timing, injection start and duration) are optimised for each fuel.