Trends in on-road transportation, energy, and emissions

Altshuler, Samuel L.; Ayala, Alberto; Collet, Susan; Chow, Judith C.; Frey, H. Christopher; Shaikh, Rashid; Stevenson, Eric; Walsh, Michael P.; Watson, John G.

doi:10.1080/10962247.2018.1512734

Cited by 5 publications

(1 citation statement)

References 78 publications

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“…For example, the mean power at the motorway part for the on-road tests was 37%, but only 30% for the laboratory tests. In any case, the important message is that there is no large discrepancy between laboratory and real world, since, for example, it was found for light-duty vehicles and reported in many studies [32] or even in the late 90s for heavy-duty vehicles [33].…”

Section: Laboratory Vs On-road Testsmentioning

confidence: 93%

Emission Factors of a Euro VI Heavy-duty Diesel Refuse Collection Vehicle

et al. 2019

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Modern (Euro VI) heavy-duty vehicles have significantly lower pollutant emissions than older vehicles. However, there are still concerns regarding the emissions of refuse collection vehicles in cities, because in some cases they may use engines designed for long haulage trucks. For this reason, we tested a diesel Euro VI (step C) refuse collection heavy-duty vehicle, both in the laboratory on a chassis dynamometer and on the road, similar to the regulated in-service conformity cycle, but also with actual refuse collection cycles. Particle number (PN) and gaseous pollutants (NOx, CO, HC) were measured using a Portable Emissions Measurement System (PEMS). Additionally, in the laboratory we used laboratory grade gaseous, particle number, and FTIR (Fourier-transform infrared spectroscopy) systems to assess the PEMS. For short periods, where the exhaust gas temperature was low for the aftertreatment devices (cold start, some city conditions), the NOx emissions reached 2000 mg/km. Nevertheless, all pollutants were well below the applicable emissions limits expressed in mg/kWh for all cycles examined (in brackets the ratio to the laboratory limit): NOx < 400 mg/kWh (0.87), CO < 850 mg/kWh (0.21), HC < 12 mg/kWh (0.08), PN < 2.4×1010 p/kWh (0.04). To make sure that this will always be the case, future heavy-duty type approval emissions regulations should specifically consider the urban conditions for municipality vehicles, such as refuse trucks.

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Section: Laboratory Vs On-road Testsmentioning

confidence: 93%