Comparison of Gaseous Emissions for B100 and Diesel Fuels for Real World Urban and Extra Urban Driving

Real World Driving: Emissions in Highly Congested Traffic

“…However, real world measurement of Euro 6 vehicle emissions [18][19][20]33] have shown a major problem of much higher missions than certified, for the reasons discussed above. Both spark ignition and Diesel engines have problems of high emissions at the low powers used in congested low speed driving as shown in this work and in the work of Hadavi et al [7] for diesels on the same congested road. The main reason for this is low exhaust temperatures and higher engine out emissions at the low average speeds of congested traffic, as shown by Hadavi et al [7] for diesels and Figs.…”

“…Both spark ignition and Diesel engines have problems of high emissions at the low powers used in congested low speed driving as shown in this work and in the work of Hadavi et al [7] for diesels on the same congested road. The main reason for this is low exhaust temperatures and higher engine out emissions at the low average speeds of congested traffic, as shown by Hadavi et al [7] for diesels and Figs. 8 and 9 in the present work.…”

“…26. Most of the data was below 10% of Euro 4 NOx, but there were a number of journeys where the NO2 was 25% of the total NOx and this is similar to the proportion in diesel engines [7]. However, the higher total NOx for diesels means that the NO2 emissions will also be higher even if the proportion is similar to real world congested traffic SI vehicle emissions.…”

“…Hadavi et al [7] for a Euro 3 diesel in the same congested section of this journey, S2, measured NOx emissions of 1.9 -3.0 g/km at mean average velocities of 5.1 -6.4 km/h. These were between 2.9 and 4.6 times the NEDC level for this vehicle of 0.65 g/km.…”

“…This applies equally to spark ignition and diesel engines [1][2][3][4][5][6][7][8][9][10][11]. This work concentrates on the influence of real world congested traffic on vehicle movement and SI vehicle emissions.…”