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 26 for “"Heavy-duty vehicles"”.
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Performance evaluation of diesel particulate filters on heavy-duty vehicles
… to reduce exhaust emissions from diesel powered vehicles. Typical designs have a wall flow filter element downstream of an oxidation catalyst, which oxidizes a portion of the NO present in the exhaust stream to form NO2. The resulting NO2 aides in the combustion of the soot collected in the wall …
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Measurement of particulate matter size, concentration and mass emissions from in-use heavy duty vehicles
As technological advancements lower heavy duty vehicle particulate matter (PM) mass emission rates, there is concern that these improvements are increasing the toxicity of the PM by virtue of a subsequent reduction in particle size. These ultrafine particles are able to better penetrate the …
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Comparison of engine and chassis dynamometer test methods for three heavy-duty vehicles emissions characterization, A
Includes bibliographical references (pages 135-140).
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Design and validation of high speed active trailer steering system for articulated heavy vehicle
Articulated heavy duty vehicles are widely used around the world for its economic and environmental benefits. A-train double is one of the most popular heavy duty vehicles in Canada. Despite its advantages, the spread of A-train is hampered by poor lateral dynamic performance and poor accident …
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Inventory and prediction of heavy-duty diesel vehicle emissions
… is an account of emissions produced by all vehicles in an area. Many different factors can affect the emissions and the measurement of the emissions that are used to create an emissions inventory. These factors for heavy-duty diesel vehicles have been addressed and their relative affect on …
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Real world heavy-duty vehicle emissions modeling
Heavy-duty vehicle emissions represent a significant portion of the mobile source emissions inventory. Accurate estimation of their contribution is essential as on-highway and non-road heavy-duty diesel emissions account for at least one third of the oxides of nitrogen (NOx) in the inventory. West …
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Evaluation of power-assist hydraulic and electric hybrids for medium- and heavy-duty vehicle applications
… and new government regulations on medium- and heavy-duty vehicles, hybrid technologies for these classes of vehicles are becoming more prevalent. A variety of technologies have been proposed to meet these requirements including power-assist hybrid electric and hybrid hydraulic systems. Although …
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Development of a micro-dilution tunnel system for in-use, on-board heavy-duty vehicle particulate matter emissions measurement
… was designed, developed and qualified. The heavy-duty engine Federal Test Procedure (FTP) requires the use of a full-flow tunnel to measure particulate emissions from diesel fueled engines. However, a full-flow tunnel based constant volume sampler (CVS) system is not only expensive to build …
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Heavy-duty emissions inventory and prediction
Heavy duty vehicle emissions represent a significant portion of the mobile source emissions inventory. Accurate estimation of their contribution is essential as on-highway and non-road heavy duty diesel emissions account for at least one third of the oxides of nitrogen (NOx) in the inventory. West …
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Laboratory and Numerical Investigation for the Mobility of Ground Vehicles on Soft Clay
The mobility of ground vehicles on soft, fine-grained soils is hindered by low traction and reduced load-bearing capacity, posing significant challenges for heavy-duty vehicles, such as military transport and construction equipment. Enhancing vehicle stability on these terrains is essential for …
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Promoting regional trade in the SADC region: identifying opportunities for manufactured exports from South Africa to Botswana, Mozambique, Namibia, Zambia and Zimbabwe
… export to the five countries are mainly found in heavy duty vehicles, automobiles, pharmaceuticals, structural and building materials, construction machinery and equipment, and petroleum oils and other petroleum products. The main challenges, as well as strategies to overcome these challenges, …
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Modelling the global prospects and impacts of heavy duty liquefied natural gas vehicles in computable general equilibrium
Natural gas vehicles have the prospects of making substantial contributions to transportation needs. The adoption of natural gas vehicles could lead to impacts on energy and environmental systems. An analysis of the main factors and trends that affect adoption of natural gas vehicles such as …
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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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Carbon Accounting in the Arboriculture Industry; Reduction of Greenhouse Gas Emissions from Tree Surgery
… was mainly attributed to the use of plant and heavy-duty vehicles and the removal of carbon storing biomass. The study suggested that changing current practices could reduce GHG emissions from arboriculture by between 12% and 18%. In 2011 DTE provided 719 tonnes of wood chip to a renewable …
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Lateral Tracking and Stability Control for Automated Vehicles
… in stability control problems for both passenger vehicles and heavy duty vehicles.
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The role of public-private clean diesel R&D partnerships in the regulatory process
… with respect to diesel fuel quality in heavy-duty vehicles. Diesel exhaust contains air pollutants such as particulate matter and nitrogen oxides, which have adverse human health and environmental impacts. For this reason, the heavy-duty diesel industry in the U.S. has been subject to …
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Physics-Based Artificial Intelligence Models for Vehicle Emissions Prediction
… NOx emissions of diesel and diesel-hybrid heavy-duty vehicles. This framework differs from black box machine learning models presented in previous literature because it incorporates engine combustion parameters that allow physical interpretation of the results. Based on chemical kinetics …
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Development, optimization and simulation of hybrid electric heavy duty truck with self-propelled trailer.
… different vehicle models. The hybridization of heavy duty vehicle and tractor and semitrailers is a recent challenge for the hybrid electric vehicle researchers. Almost 20% of the total US truck fuel is approximately consumed by tractor and semi-trailers which shows the bright potential of …
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Data-Driven Routing for Autonomous Trucks: Learning from Human Behavior with Context Awareness and Privacy Protection
… trade amplify the importance of trucking, heavy-duty vehicles carry most domestic and international shipments. However, trucking operations increasingly face challenges related to congestion, infrastructure limitations, and disruptive extreme weather events. These factors directly affect …
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Investigation of PM Formation and Evolution in Plumes Emitted by Heavy-Duty Diesel Vehicles: Wind Tunnel Study
… of real-world emissions from these engines or vehicles. In addition, formation and evolution of PM from these engines are extremely sensitive to overall changes in the dilution process. In light of this, the study of the exhaust plume of a heavy-duty diesel vehicle operated inside a subsonic …
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