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Climate changes, continuous increase of energy consumption in transport and requirements for reducing dependency on oil import, promote the use of alternative fuels in motor vehicles. The most used alternative fuel in Europe is liquefied petroleum gas (LPG), which currently propels around 3% of passenger cars in Europe. Since the LPG is produced by refining the crude oil or by separation from natural gas, in the paper comparison of LPG with gasoline and gaseous fuels of fossil origin (compressed natural gas (CNG), liquefied natural gas (LNG)) and gaseous fuels of organic origin (biogas) has been made. Except the fuel composition, technical level or generation of LPG system installed in the vehicle impacts the emissions, so an overview of existing systems and their major components is given. By analysing the data of registered motor vehicles of category M1 (passenger cars) in the Republic of Croatia for vehicles powered by LPG categorization of vehicle age, mileage, emission standard and generation LPG system installed in the vehicle is made. This categorization enables estimation of emissions from LPG powered motor vehicles. |
