Abstract
The subject of the article is the exhaust emission analysis of harmful gases from an two-wheeled urban motor vehicle in real operating conditions. For this purpose, characteristics of ecological indicators of compounds such as hydrocarbons (HC), carbon monoxide (CO), carbon dioxide (CO2) and nitrogen oxides (NOx) were presented. The tests were carried out on a two-wheeled urban vehicle, equipped with an engine with a stroke volume of 49 cm3 and a maximum power of 2.5 kW. What's more, the operating parameters of a moped registered during the test were also analyzed. The measurements were performed in real operating conditions in the Poznań agglomeration. The designated route included streets in the city center, and the maximum permissible speed did not exceed 50 km/h. The AXION R/S+ mobile apparatus belonging to the PEMS (Portable Emissions Measurement Systems) group was used for the research. The device is one of the most modern measuring instruments, enabling the measurement of concentrations and emissions of both gaseous and solid exhaust components. What is more, the obtained results of road emissions of harmful compounds were referred to the limit value of the exhaust emission norms, which the tested vehicle is expected to meet (Euro 3). The results indicated that the limit value for carbon monoxide was exceeded by 52%.
Highlights
In accordance with the Polish traffic law of June 20, 1998, a moped is a one- or two-axle vehicle, equipped with a combustion engine with a stroke volume not exceeding 50 cm3, whose design limits its travel speed to 45 km/h. [1]
The vehicle group to which the tested vehicle belonged is characterized by a relatively simple construction, which results in the users of such two-wheeled vehicles often making slight adjustments or repairs by themselves, rather than at authorized service centers
In part because of this these vehicles are characterized by significant emission factors, primarily hydrocarbons and carbon monoxide, as shown in this article
Summary
In accordance with the Polish traffic law of June 20, 1998, a moped is a one- or two-axle vehicle, equipped with a combustion engine with a stroke volume not exceeding 50 cm, whose design limits its travel speed to 45 km/h. [1]. These tests focus primarily on the modification of type approval tests based on the operating parameters obtained in real driving conditions [3, 4]. The lack of regulations concerning the RDE (Real Driving Emissions) procedure for two-wheeled vehicles, as well as the lack of available equipment for exhaust emission tests from this group of vehicles, resulted in them only being tested in laboratory conditions far
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