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The article presents the emission measurements results of a modern gasoline engine with direct fuel injection. The test cycle being performed on the dynamic dynamometer is a reflection of the real conditions recorded during a PC vehicle drive in the Poznan agglomeration and was carried out in accordance with the RDE (Real Driving Emissions) procedure as defined by the European Union that came into force in September 2017. The dynamometer tests were divided into urban, non-urban and motorway sections including selected operating points taken from the real tests with the highest frequency of occurrence. The measurements were conducted using a mobile device to record the concentrations of carbon dioxide, carbon monoxide, nitrogen oxides and hydrocarbons. The mass flow meter connected to the engine made it possible to convert the obtained concentrations into emission values. Due to tests being performed on the engine dynamometer, the mass of emitted harmful components was related to the produced energy unit (g/kWh). This allows a comparison of different engine types according to one criterion. The results obtained for different drive cycles were compared. Information on specific emissions was obtained, which made it possible to draw conclusions regarding emissions in a given drive cycle and compare them with the results obtained in real driving conditions.

The article presents a comparative analysis of harmful compounds: carbon dioxide (CO2), carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx) and particulate matter (PM) emitted from vehicles of the passenger car and non-road categories. The research object representing the first category was a vehicle equipped with a Euro 5 compliant compression ignition engine with a common rail fuel injection system. The second one was represented by an agricultural tractor with a compression ignition engine. The tests were carried out in real operating conditions in the Poznan agglomeration. In the case of the passenger car, a real drive was carried out, including passengers, on roads with different speed limits in accordance with the RDE procedure, as adopted in 2017. However, the farm tractor was tested while conducting field work. The tests were carried out using analyzers from the PEMS (Portable Emission Measurement System) group. In order to perform a comparative analysis of vehicles from two separate categories, the results obtained were presented in the form of unit emissions (g/kWh). This paper was aimed at assessing the emissivity of a non-road vehicles and relate them to results obtained from passenger cars. Moreover, the current legislation, tightening the provisions of the increasingly numerous non-road vehicles group has also been assessed.