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Measurement of Exhaust Emissions from a Two-Wheeler – an Experimental Validation of the Remote-Sensing Method

Rymaniak Łukasz, Mąka Monika, Szymlet Natalia, Kamińska Michalina, Kęska Aleksandra

Journal of Ecological Engineering

2023

Vol. 24, nr 12

60--71

The paper presents the problem of testing vehicles, which are some of the main sources of air pollution. The authors suggested the remote-sensing method as a tool for the measurement of the vehicle exhaust emissions and an on-going control thereof. This is an economical solution that allows measuring a large number of vehicles in a short time. The presented work aims at an experimental validation of the measurement method of exhaust emissions on the example of a two-wheeler. To that end, two parallel laboratory tests were carried out: measurement of the exhaust emissions obtained directly from the tailpipe using the PEMS (Portable Emission Measurement System) equipment and from the exhaust cloud, utilizing a module emission gate. A significant mutual correlation of the results confirms the efficiency of the method. The highest value of the coefficient of determination was obtained for the CO2, PM and NO analyzers. Different orders of values were primarily caused by the dissipation of the exhaust gas and the influence of the ambient conditions on the measurement process. Further works are therefore necessary to allow an assessment of the actual measurement uncertainty of the equipment irrespective ofthe fueling system and type of vehicles.

Time-dependent problem for determination of exhaust concentration in urban transport system

Grashin S., Rimshans J. S., Kopytov A. E., Guseynov S. E., Schiptsov O. V.

Autobusy : technika, eksploatacja, systemy transportowe

2010

R. 11, nr 6

The paper proposes the 3-D mathematical model for analytic determination of exhaust concentration dynamics in the city regions under a priori information on airflow velocity. In this model it is provided that the turbulent and molecular diffusion coefficient changes depending on the vertical remoteness above the ground surface. The numerical example of problem solving is presented. The created model can be used for solutions of operative problems on urban traffic organization, of long-term planning of urban agglomeration development and new highway building.