Authors: |
Demostenis Ramos Cassiano, Julie Anne Holanda Azevedo, Helry Luvilany Fontenele Dias, Rinaldo dos Santos Araújo, Francisco Sales Ávila Cavalcante, Bruno Vieira Bertoncini, Nara Angelica Policarpo and Mona Lisa Moura de Oliveira |
Abstract: |
Vehicle emissions are substantially contributing for air pollution in urban areas. It is estimated that around 23% of global carbon dioxide (CO2) emissions just comes from the transportation sector. Particularly, carbon monoxide and hydrocarbons pollutants from light vehicles emissions (i.e. Otto cycle) are the most significant. However, heavy duty vehicles such as Diesel cycle are responsible for most emissions of nitrogen oxides and particulate matter. Considering the negative impacts of atmospheric pollution, several efforts have been made by researchers in the development and determination for automotive vehicles. The use of emission factors as input data for vehicle emissions modeling are an useful tool to support policy development, evaluation and optimization of urban mobility. Thus, this paper aims to explain an alternative method for emissions monitoring developed by authors for an on-board system that can be used in light or heavy duty vehicles (i.e. flex-fuel and diesel engine), named MAMUTE – Monitoring AutoMotive Unit Transit Emissions. This paper also describes the application of the developed equipment and emission factors obtained for the main pollutants from combustion for both Otto and Diesel engines, as well as the analysis of effect of operating modes vehicle. In general, emission factors for Diesel vehicle showed higher values than flex-fuel vehicle. It was observed that the acceleration mode had a more significant influence than others operating modes for the tested vehicles (i.e. flex-fuel and diesel), generating significant emission rates. Also, it was obtained emission factors similar to those described in the literature. |