Impacts of load mass on real-world PM1 mass and number emissions from a heavy-duty diesel bus

Wang, C.; Wu, Ye; Jiang, Jingkun; Zhang, Shizhong; Li, Z.; Zheng, Xuan; Hao, Jiming

doi:10.1007/s13762-013-0473-z

Cited by 11 publications

(7 citation statements)

References 41 publications

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“…When comparing specific SPN 23 emissions (#/kWh) calculated according to the approach described in the "Evaluation Methodology" Section 2.5, it can be noticed that at higher load they were 75% more. This finding is in agreement with previous studies that observed increased particulate mass [20] and particle number emissions [21] for higher loads of a heavy-duty diesel truck and bus, respectively. SPN 10 emissions were 25% higher than SPN 23 at 10% payload and 20% at 55% payload.…”

Section: Effect Of Payloadsupporting

confidence: 94%

Measuring Emissions from a Demonstrator Heavy-Duty Diesel Vehicle under Real-World Conditions—Moving Forward to Euro VII

et al. 2022

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The European Union (EU) has introduced since the early 1990s a series of progressively more stringent emission regulations to control air pollution from the transport sector, commonly known as Euro standards. Following this path, more recently, with the European Green Deal, the European Commission has indicated the intention to review the current air pollutant emissions standards. This study investigates the emission performance of an advanced demonstrator vehicle developed to meet the increasingly more stringent air pollution limits required. Emissions of currently regulated and unregulated components including NH3, N2O, and SPN10 (solid particle number), were studied in a very wide range of real-world operative conditions. The performance of two new generation portable instruments for the onboard measurement of N2O and NH3 were also evaluated in comparison with reference laboratory equipment. Similarly, the measurement accuracy of onboard NOx sensors was also compared to laboratory reference. The vehicle presented low emissions of NOx and NH3 and relatively low emissions of N2O, also compared to data currently available in the literature, in a broad range of operative conditions, which however resulted in a large variability in emissions.

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Section: Effect Of Payloadsupporting

confidence: 94%

Measuring Emissions from a Demonstrator Heavy-Duty Diesel Vehicle under Real-World Conditions—Moving Forward to Euro VII

et al. 2022

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“…Overflow of citizens in cities is the main problem which causes higher level of air, particle, noise and light pollution (Dyr et al, 2019). All these and other reasons may do harm to environment and human health(C. Wang et al, 2015), (Tong et al, 2000), (Smieszek et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the concentration of particles generated by public transport gas (CNG) buses

Matijošius¹,

Juciūtė²,

Rimkus³

et al. 2022

CogSust

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The sustainable development of public transport is inseparable from its key elements, transport. In recent years, reflections on green public transport have been steadily intensifying and setting new guidelines for its development focused on the environment. Gas-powered, more environmentally friendly diesel buses are used for this purpose. Part of such a transport fleet in Vilnius consists of such buses. Pollution from mobile sources is predominant in cities, so particulate matter from different gas buses (powered by CNG) was identified in this study. In this study, particle concentration measurements were performed, in which the dependence of the particle concentration on the mileage of the buses was determined.

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“…Emissions from motor vehicles are a major source of urban air pollutant emissions, such as nitric oxides, carbon monoxide, hydrocarbons, and carbon dioxide [1][2][3][4][5]. For instance, relevant research studies indicated that about 45% of the pollutant emissions in the United States were a direct consequence of vehicle operations [6].…”

Section: Introductionmentioning

confidence: 99%

On-Road Bus Emission Comparison for Diverse Locations and Fuel Types in Real-World Operation Conditions

Wang

Sun

2020

Sustainability

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Urban buses have energy and environmental impacts because they are mostly equipped with heavy-duty diesel engines, having higher emission factors and pollution levels. This study proposed a mean distribution deviation (MDD) method to identify bus pollutant emissions including CO, CO 2 , HC, and NO X at road sections, intersections, and bus stops for different fuel types; and explore the changes in emissions for different locations in the road sections, bus stops, and intersection influence areas. Bus speed, acceleration, and emissions data were collected from four fuel types in China. For different locations and fuel types, the differences in emissions were all statistically significant. MDD values for different locations indicated that there were more obvious differences in emissions between road sections and intersections. In addition, heat maps were applied in this study to better understand changes in bus emissions for different locations in the bus stop influence areas, intersection influence areas, and road sections. the proportion of new energy vehicles in buses is largely increasing, it is necessary to re-estimate the emissions characteristics of public transport vehicles, especially for new energy buses. In particular, intersection and bus stop areas can create congestion and further increase emission rates due to speed changes and stop-and-go operations [24][25][26][27]. In light of these considerations, measuring and comparing bus emissions at different locations are one of the emphases of this study.The first category of vehicle emission analysis methods is aimed at analyzing exhaust fumes for large areas and regions. This kind of emission analysis is regarded as a "macro" scale and is combined with the average values of influencing variables [28]. The second category aims to develop models to provide more precise knowledge about vehicle emissions in easily identifiable environments, which are called "micro" or "local" scale models. This approach offers the chance to acquire vehicle emissions data in real-world conditions [28,29]. Zhang et al. investigated the emission characteristics of transportation vehicles using real data [30]. From the results, the problem of NO X emissions is still confronted with severe challenges. For different locations, the performance of pollutant emissions may vary. In the relevant reference [18], approximately half of bus emissions were produced in and around intersection/stop areas. In addition, the use of alternative fuels, such as compressed natural gas, biodiesel, and hybrid technology (diesel/electric) reduced carbon emissions, leading to improved air quality [31][32][33][34]. For instance, Dreier et al. found an absolute reduction of 1115 g CO 2 per kilometer when using plug-in hybrid-electric city buses [35]. It should be noted that if the available data and information about the application system and technologies (such as bus emissions) are incomplete, imprecise, and uncertain, then technology identification could be very difficult. Liu et al. introduced a simpl...

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Impacts of load mass on real-world PM1 mass and number emissions from a heavy-duty diesel bus

Cited by 11 publications

References 41 publications

Measuring Emissions from a Demonstrator Heavy-Duty Diesel Vehicle under Real-World Conditions—Moving Forward to Euro VII

Measuring Emissions from a Demonstrator Heavy-Duty Diesel Vehicle under Real-World Conditions—Moving Forward to Euro VII

Investigation of the concentration of particles generated by public transport gas (CNG) buses

On-Road Bus Emission Comparison for Diverse Locations and Fuel Types in Real-World Operation Conditions

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