Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"vehicle emission"”.
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Incorporating Vehicle Emission Models into the Highway Design Process
… amount of non-reusable energy and emits emissions as by-products of fuel consumption. There has been much progress in the development of vehicle engine technology and alternative fuels to reduce the adverse impact of highway transportation on the environment. However, the research …
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NeuralMOVES: Extracting and Learning Surrogates for Diverse Vehicle Emission Models
… given its major contribution to greenhouse gas emissions. The industry actively explores electrification, automation, and Intelligent Infrastructure to mitigate emissions. However, the successful design and implementation of these solutions require accurate and representative emission models. …
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The development of a regional inventory database for the material phase of the pavement life-cycle with updated vehicle emission factors using moves
… was performed. As such, the greenhouse gas (GHG) emissions and energy consumption per unit mass of materials were computed and combined to develop a regional LCI database. The study updated the existing vehicle emission factors through simulations using EPA’s newest vehicle emission simulator, …
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Monoaromatic hydrocarbons and aldehydes in Las Vegas air
… found. These observations are consistent with vehicle emission as a major source of monoaromatic hydrocarbons and a primary source of aldehydes in ambient air; CO normalized concentrations were used to infer the occurrence of photochemical reactions in atmosphere. There are significant negative …
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Evaluation of opacity, particulate matter, and carbon monoxide from heavy-duty diesel transient chassis tests
Opacity and emission data were collected from heavy-duty diesel engines exercised through snap-acceleration tests and transient chassis dynamometer tests. Emission data were gathered using the West Virginia University (WVU) Transportable Heavy Duty Vehicle Emission Testing Laboratories (THDVETL) …
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Historical anthropogenic emissions of carbon monoxide, 1850 - 2000
We present a bottom-up emission inventory of carbon monoxide (CO) from fossil fuel and biofuel combustion from 1850 to 2000. We reconstruct fuel consumption data of brick and cement industry, as well as production data of iron and steel industry. We develop technology divisions for the four …
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Driving down emissions : analyzing a plan for meeting Massachusetts' carbon emission reduction targets for passenger vehicles
… one of the US states at the forefront of carbon emission reduction policy, and has the potential to model success to the rest of the country. The state's Global Warming Solutions Act (GWSA) passed in 2008, two years before federal climate legislation floundered in the U.S. Senate. This …
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Heavy-duty diesel vehicle Nox̳ aftertreatment in 2010 : the infrastructure and compliance challenges of urea-SCR
Increasingly stringent heavy-duty vehicle emission regulations are prompting the use of PM and NOx aftertreatment systems in the US, the EU and Japan. In the US, the EPA Highway Diesel Rule, which will be fully implemented in 2010, has stimulated debate over whether urea selective catalytic …
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Air quality analysis of nitrogen oxides and relationships with ozone pollution
… as well as ozone pollution related to NOx emissions. A review of the impacts of transportation is provided as it pertains to various types of NOx pollution. To improve the air quality, the recent research focuses on how suitable monitoring methods can be used to more economically and …
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The environmental impact assessment of road schemes: with special reference to air quality in Lancashire
… air quality was inaccurate at the sites tested. Vehicle emission modelling before and after the opening of the Freckleton Bypass indicated that the network total masses of carbon dioxide, carbon monoxide, hydrocarbons and lead were less in the "after" situation compared with the "before, and that …
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An Investigation of Turbulence and Diffusion within Vehicle Wakes and On-Road Measurements using an Instrumented Mobile Car and a Stationary Roadside Monitoring System
Moving motor vehicles emit pollutants that negatively impact human health. Stationary roadside measurements alone are not sufficient to quantify the pollutant–flow interactions that occur behind moving vehicles. The instrumented mobile car however is well–suited for on–road measurements, but has …
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Attribution of PM₂.₅ Health Impacts in Asia-Pacific
Asia-Pacific anthropogenic emissions have changed rapidly in recent years due to industrialization, increasing mobility, and emissions controls. Although these changes have altered the region's burden of premature mortalities due to ambient fine particulate matter (PM₂.₅), the contribution of each …
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Microscopic Fuel Consumption and Emission Modeling
Mathematical models to predict vehicle fuel consumption and emission metrics are presented in this thesis. Vehicle fuel consumption and emissions are complex functions to be approximated in practice due to numerous variables affecting their outcome. Vehicle energy and emissions are particularly …
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Utilizing High Resolution Data to Identify Minimum Vehicle Emissions Cases Considering Platoons and EVP
… and accommodation algorithm that minimizes vehicle emissions. The algorithm was developed and implemented in the AnyLogic framework, and was validated by comparing it to the results of prior research. A four-module flowchart was developed to analyze the traffic data and to identify platoons. …
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Model-Based Control Development for an Advanced Thermal Management System for Automotive Powertrains
Rising fuel prices and tightening vehicle emission regulations have led to a large demand for fuel efficient passenger vehicles. Among several design improvements and technical solutions, advanced Thermal Management Systems (TMS) have been recently developed to more efficiently manage the thermal …
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Effect of Vehicular Electrification on Transportation Emissions in Florida
<p>Vehicular emissions from fuel-based passenger cars emit an array of gases and particles that are detrimental for human health and the environment. In that regard, electric vehicles (EVs) present a viable, sustainable solution. This study investigated the impact of electrification of passenger …
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Developing and Testing a Novel De-centralized Cycle-free Game Theoretic Traffic Signal Controller: A Traffic Efficiency and Environmental Perspective
… mobility can help reduce traffic congestion and vehicle emissions, and thus, optimizing the performance of available infrastructure via advanced traffic signal controllers has become increasingly appealing. The second objective in the dissertation is to develop a novel de-centralized traffic …
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Quantifying the Impact of Traffic-Related and Driver-Related Factors on Vehicle Fuel Consumption and Emissions
… the dominant source of U.S. fuel consumption and emissions. Specifically, highway travel accounts for nearly 75 percent of total transportation energy use and slightly more than 33 percent of national emissions of EPA's six Criteria pollutants. Enactment of the Clean Air Act Amendment of 1990 …
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A CFD Study of Pollution Dispersion in Street Canyon and Effects of Leaf Hair on PM2.5 Deposition
… mixing induced by individual jets used to model vehicle emission in the experiment. LES is also capable of providing transient flow field and pollution concentration data not available with widely-used steady approaches such as RANS. The time-dependent information is crucial for pollution …
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