This review paper covers major regulatory and tech-nology developments in 2018 pertinent
to tailpipe emissions of greenhouse gases and criteria pollutants. Europe has proposed …

In comparison to legacy engine technology, natural gas vehicles have become cleaner and
more efficient. Improved fueling infrastructure has supported the growth of natural gas …

Road transport significantly contributes to air pollution in cities. Emission regulations have
led to significantly reduced emissions in modern vehicles. Particle emissions are controlled …

At present there is no clear epidemiological evidence linking adverse human health effects
to ultrafine particles (UFP), arguably because there is no universally agreed upon UFP …

Based on DPF filtration and regeneration bench, the solid particle emission and high-
temperature filtration characteristics of different carbon black particle loadings and particle …

This study assessed the real-world emissions from two heavy-duty natural gas vehicles
certified to the optional 0.02 g/bhp-hr nitrogen oxides (NOx) standard and one diesel vehicle …

The use of trucks running on liquefied natural gas (LNG) instead of diesel is not a suitable
measure for climate protection in road freight transport. Even in an optimistic scenario …

Condensable particulate matter (CPM) corresponds to primary particulate matter≤ 2.5 μm
(PM 2.5) obtained through the condensation of gaseous air pollutants caused by …

Natural gas engines have become increasingly important in transportation applications,
especially in the commercial vehicle sector. With increasing demand for high efficiency and …

Yard tractors (YTs) are trucks used for moving trailers and containers short distances around
freight terminals and port facilities, and their diesel engines contribute significantly to nitric …