Abstract

The paper presents the test results of pollutant emissions from the compression ignition engine in dynamic driving test conditions: the New European Driving Cycle type approval test (NEDC) and the Stop and Go special test for vehicle traffic congestion simulation and Autobahn test simulating traffic on motorways and expressways. The engine was fuelled with test fuels of different compositions of primary fuels: diesel fuel and RME fuel treated as diesel fuel. The dependence of the road emission of pollutants on the fuel content of RME in test fuels was presented. The sensitivity of the pollutant emissions to the RME fuel content in test fuels and the uniqueness of the sensitivity coefficient were investigated. It has been found that the RME fuel additive is conducive to the reduction of carbon monoxide, hydrocarbons and, especially, particulate matter road emissions and the increase of nitrogen oxides and carbon dioxide road emissions. The strongest sensitivity of the pollutant emissions to the RME fuel content in the test fuel, as well as the uniqueness of the sensitivity coefficient, is in the traffic conditions of vehicles with high engine dynamics and low load, i.e. in the Stop and Go test. The most sensitive to RME fuel content in the test fuel is the particulate matter emission, the least – carbon dioxide.

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