Abstract
This study mapped work machines having internal combustion engines that are used in Finland. The aim of the study was to clarify the number and average engine power of machines in use, their annual operating hours, and their loading properties, in order to calculate the exhaust emissions from these machines. The numerical data were gathered from sales figures, vehicle registration, and statistics on production, import, and export. The average load factor was evaluated on the basis of the real fuel consumption in comparison to nominal fuel consumption. Data on the duration operation are based on the number of working hours and the results of earlier studies. There were about 400 000 diesel engined machines in Finland in 1990. The most common types of machines are agricultural tractors, construction machines, and combine harvesters. The total fuel consumption of diesel machinery was 780 000 m 3 accounting for about 30% of the total amount of diesel fuel consumed in traffic. Nitrogen oxide emissions came to 41 million kg, which is 15% of all nitrogen oxide emissions in Finland. Other studied compounds—unburned hydrocarbons, carbon monoxide, and particulate matter—accounted for 5–10% of all emissions in Finland.
Published Version
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