A decade of measuring on-road vehicle emissions with remote sensing in Australia

Smit, Robin; Bainbridge, Scott; Kennedy, Daniel W.; Kingston, Phil

doi:10.1016/j.atmosenv.2021.118317

Cited by 20 publications

(4 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The VSP of LDPC is only 14.4% in the negative range, 30.4% in Bin0 distribution, and 55.2% in the positive range. The VSP of LDPC is mainly distributed in (−3, −1], (−1, 1], (1, 3], (3,5], (5,7] and (7,9] range, which indicates that LDPC drives in a relatively stable state most of the time, and the proportion of rapid acceleration and deceleration is relatively low. The VSP distribution of LDDT and LDPC is similar.…”

Section: Emission Characteristics Of Pollutants Based On Vspmentioning

confidence: 99%

“…To identify the characteristics of vehicular emissions, various test methods were adopted in previous studies. For example, traffic tunnel measurement [2,6], remote sensing technology [7,8], the dynamometer test [9,10] and roadside sampling [11]. However, due to the different test principles, results obtained with these methods may not accurately reflect the exhaust emission characterization under real driving conditions, which means test vehicles being driven on the public roads in real traffic [12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterization of Exhaust CO, HC and NOx Emissions from Light-Duty Vehicles under Real Driving Conditions

Hui

Wang

et al. 2021

Atmosphere

View full text Add to dashboard Cite

On-road exhaust emissions from light-duty vehicles are greatly influenced by driving conditions. In this study, two light-duty passenger cars (LDPCs) and three light-duty diesel trucks (LDDTs) were tested to investigate the on-road emission factors (EFs) with a portable emission measurement system. Emission characteristics of carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx) emitted from vehicles at different speeds, accelerations and vehicle specific power (VSP) were analyzed. The results demonstrated that road conditions have significant impacts on regulated gaseous emissions. CO, NOx, and HC emissions from light-duty vehicles on urban roads increased by 1.1–1.5, 1.2–1.4, and 1.9–2.6 times compared with those on suburban and highway roads, respectively. There was a rough positive relationship between transient CO, NOx, and HC emission rates and vehicle speeds, while the EFs decreased significantly with the speed decrease when speed ≤ 20 km/h. The emissions rates of NOx and HC tended to increase and then decrease as the acceleration increased and the peak occurred at 0 m/s2 without considering idling conditions. For HC and CO, the emission rates were low and changed gently with VSP when VSP < 0, while emission rates increased gradually with the VSP increase when VSP > 0. For NOx NOx emission rates were lower and had no obvious change when VSP < 0. However, NOx emissions were positively correlated with VSP, when VSP > 0.

show abstract

Section: Emission Characteristics Of Pollutants Based On Vspmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization of Exhaust CO, HC and NOx Emissions from Light-Duty Vehicles under Real Driving Conditions

Hui

Wang

et al. 2021

Atmosphere

View full text Add to dashboard Cite

show abstract

“…The most common manipulations in diesel PCs and LCVs are on the EGR valve, diesel particulate filter (DPF), NO X sensor, SCR, and DEF dosing system, etc. [28,29]. Previous studies have shown that tampering with ECSs significantly increases pollutant emissions, especially for NO X and PN [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

An Estimate of the NOX Emissions of Euro 6 Diesel Passenger Cars with Manipulated Emission Control Systems

Rešetar,

Pejić,

Ilinčić

et al. 2024

Sustainability

View full text Add to dashboard Cite

The motivation for conducting this research stems from the increasingly applied manipulations of emission control systems (ECSs), especially those in diesel passenger cars (PCs). The study aimed to investigate the influence of manipulations of exhaust gas recirculation (EGR) valves and a diesel exhaust fluid (DEF)-dosing system on the nitrogen oxide (NOX) emissions of a Euro 6 diesel vehicle and, through the quantification of vehicles with manipulated ECSs, estimate the emissions of Euro 6 diesel PCs. Portable emissions measurement system (PEMS) measurements were performed on a Euro 6 diesel vehicle at a constant speed and on real driving emission (RDE) routes. The speed-dependent functions of the NOX hot emission factor (EF) were calculated for seven different scenarios. The results showed that the NOX EFs for the worst-case scenarios were more than two orders of magnitude higher than those where all ECSs were active. Applying the calculated EFs and the survey answers on the percentage of manipulated PCs to the Croatian Euro 6 diesel PC fleet, the results showed that the emission levels were up to 46.3% higher than the emissions calculated by the official computer program COPERT v5.6.5, with a tendency towards significantly higher values. The main conclusion is that vehicle manufacturers, policymakers, and the general public need to be informed about the enormous damage that in-use vehicles with manipulated ECSs cause to the environment and human health, in order to prevent such actions.

show abstract

“…The increase of accident risk with each additional year of vehicle age is quite remarkable, about 7.8% according to estimates by Keall and Newstead (2013), compromising road safety as a result. Moreover, a large body of research shows that internal combustion vehicles with older technologies can emit higher levels of dangerous fumes, thus exposing people to high air pollution (Harrington, 1997;Zachariadis et al, 2001;Beydoun and Guldmann, 2006;Chen and Borken-Kleefeld, 2016;Pandey et al, 2016;Grigoratos et al, 2019;Bernard et al, 2020;Smit et al, 2021). This effect contributes significantly to the recognition of the road transport sector as responsible for most of the concentration of nitrogen oxides (NO 𝑥 ) and also largely responsible for breathable particulate matter (PM 2.5 and PM 10 ) detected in urban areas (e.g., Grice et al, 2009;Wang et al, 2010;Font et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Is Vehicle Scrapping Affected by Low-Emission Zones? The Case of Madrid

Balaguer¹,

Pernías²,

Ripollés³

2022

SSRN Journal

View full text Add to dashboard Cite

A decade of measuring on-road vehicle emissions with remote sensing in Australia

Cited by 20 publications

References 34 publications

Characterization of Exhaust CO, HC and NOx Emissions from Light-Duty Vehicles under Real Driving Conditions

Characterization of Exhaust CO, HC and NOx Emissions from Light-Duty Vehicles under Real Driving Conditions

An Estimate of the NOX Emissions of Euro 6 Diesel Passenger Cars with Manipulated Emission Control Systems

Is Vehicle Scrapping Affected by Low-Emission Zones? The Case of Madrid

Contact Info

Product

Resources

About