This dissertation presents a measurement system assembly alongside necessary key modifications required to properly control and analyze the thermodynamics of combustion and pollutant formation in a four-cylinder spark ignited synthesis gas fuelled internal combustion engine. Based on measurements carried out, several analysis of key phenomena have been performed, namely: global thermodynamic parameters, concentration of pollutants in exhaust, thermodynamic aspects of combustion, knock behavior, cycle to cycle and cylinder to cylinder variations. The analyzed parameters are addressed in comparison with ones acquired when natural gas was used as fuel instead of synthesis gas. Based on results of analyzed phenomena, we can sum up the key findings as:
- when working with stoichiometric mixture the efficiency remains the same if we retard the ignition, otherwise it falls slightly,
- emissions of nitric oxides and THC decrease by at least one order magnitude, while emissions of carbon monoxide and particles fall by a bit less,
- knocking or any other form of spontaneous combustion does not occur,
- combustion duration is prolonged by at least 15%,
- cycle to cycle variations become less pronounced and their presence alone is changed due to different pressure conditions within the intake manifold.
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