Influências dos modos de operação nas emissões de poluentes provenientes de veículos flexem região urbana

Abstract

This work proposes to verify the influence of operating modeson pollutants emissions of flex –fuel vehicles. For this, a real driving cycle was developed for the flex light vehicle in an urban street of the Fortaleza city. For data collection was used a method of instant collection of kinematic parameters from engine, road and vehicle emissions. Due to the local characteristics of the traffic, a greater representatively of the idle operating modeswas observed. In general, there was a greater influence of the acceleration mode on pollu-tant emissions and fuel consumption. The highest average CO2emission rate was observed during acceleration mode (6.38 mg/s), followed by the idle mode (4.70 mg/s). For the CO pollutant, the highest average emission rate was also observed during the acceleration mode (55.60 μg/s), followed by the idle mode (35.01 μg/s). For the NOxpollutant, higher emission rates were observed in the acceleration mode, 5.08 μg/km and 1.98 μg/km for the idle mode. The average fuel consumption in the acceleration mode was 6.61 L/100 km during the tests, followed by idle and deceleration modes, with 4.84 and 3.39 L/100 km, respectively.