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 50 for “"Tailpipe"”.
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Two dimensional diffusers with plenum and tailpipe discharge.
Two dimensional diffusers, both with and without tailpipes, have been tested with different inlet boundary layer conditions and various diffuser geometries. The effect on the developing boundary layer parameters within the diffuser and tailpipe are investigated for the various conditions. The …
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Feedstock-To-Tailpipe Analysis of Soybean-Derived Biodiesel and Glycerol Valorization in Kansas
Biodiesel has become a popular substitute to ultra-low sulfur diesel due to its production from renewable or waste feedstocks and direct use in compression-ignition engines. Biodiesel is currently fabricated via oil transesterification which also produces crude glycerol as a byproduct. The crude …
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Analysis of tailpipe particulate matter emission from a sampling of Kansas City vehicles
<p>As the United States Environmental Protection Agency (EPA) seeks to model vehicle emissions based on dynamic engine operating conditions, modal PM datasets will be investigated for their robustness and limitations under the requirements of the EPA’s model: MOVES. The Kansas City PM …
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Determination and analysis of natural gas vehicle tailpipe emissions based on continuous CVS measurement
… prior to being diluted. In this study, vehicle tailpipe emissions characteristics at different engine operation modes were analyzed for different natural gas engines and measures for reducing emissions were also discussed.
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Plug-in Hybrid Electric Vehicle Supervisory Control Strategy Considerations for Engine Exhaust Emissions and Fuel Use
… empirically and experimentally measuring vehicle tailpipe emissions and energy consumption for two distinct control strategies. The results of the experimental testing and analysis define how the vehicle reduces fuel consumption, petroleum energy use and greenhouse gas emissions while maintaining …
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Diesel particulate matter quantification and reduction strategies for school buses
… self pollution from both the crankcase and the tailpipe emissions to in-cabin levels of fine and ultrafine particulate matter, and determined the effectiveness of commercially available retrofit technologies towards reducing levels of particulate matter inside the school bus passenger …
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An Experimental Study of Transient Flows in Pulse Combustors
… These parameters were recorded for two different tailpipe lengths and centerbodies, and for different ambient conditions. Power spectrums were then obtained from the pressure variations. These spectrums displayed the peak amplitudes and the frequencies at which they occurred. The experiment showed …
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Effect of plug in hybrid electric vehicle adoption on gas tax revenue, local pollution, and greenhouse gas emissions
… tradeoffs between the benefits of reduced tailpipe emissions against the drawbacks of increased emissions at marginal electric generation plants and reduced gasoline tax income. In this report, a model is developed that will enable these tradeoffs to be studied. The model accounts for local …
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Life cycle air pollutant and carbon emissions from China’s road transport under vehicle electrification and renewable electricity expansion scenarios
… However, most existing assessments focus on tailpipe emissions and overlook upstream emissions from electricity generation and vehicle and battery manufacturing. Moreover, limited attention has been paid to the spatial heterogeneity of emissions and mitigation potentials across regions. This …
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Design and analysis of a modified power-split continuously variable transmission
… and a potential for reduced fuel consumption and tailpipe emissions. The power split CVPST has a potentially higher mechanical efficiency than a conventional shaft-to-shaft CVT, but it is unknown whether that efficiency can be improved. For the CVPST, the branch control circuit that contains the …
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Potential of electric propulsion systems to reduce petroleum use and greenhouse gas emissions in the U.S. light-duty vehicle fleet
… fuel economy and reduces emissions from the tailpipe. For example, a Chevrolet Volt PHEV is expected to be launched as 2011 model with 40 mile allelectric travel with no tailpipe emissions. However, there are multiple challenges associated with the new technology. HEVs and PHEVs incur higher …
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Particle Matter Measurements for Inspection/Maintenance Programs
… dynamometer gravimetric analysis. The Electronic Tailpipe Particle Sensor (ETaPS) is an inexpensive measurement device purported to give real time response to particle mass and was proposed as a possible addition to Inspection/Maintenance (I/M) programs. There were three goals to this study. The …
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The effect of sulphur in fuel on the performance of automotive catalysts
… have been used on cars since 1974 to reduce tailpipe emission levels of carbon monoxide, hydrocarbons and oxides of nitrogen. Initially, oxidation catalysts were used that operated under very lean air/fuel conditions and gave rise to increased sulphate particulate emissions. These sulphate …
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Iron Reduction in Soot
… conditions including those encountered in the tailpipe of a vehicle. Aqueous leaching experiments of soot-hematite mixtures were carried out while analyzing for Fe(II) spectrophotometrically, and changes in Fe(II) concentrations were then investigated in the context of soot characteristics, …
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Strategies for the introduction of alternative fuel vehicles in India
… train in India. This has led to increase in tailpipe emissions in congested cities as well as increased consumption of crude oil. India needs to devise effective strategies to introduce fuel efficient nonpolluting Alternative Fuel Vehicles (AFV) to reduce GHG emissions and reduce oil …
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A theoretical assessment of fuel combustion attributes to enhance the operational envelope of HCCI engines
… extremely low NOx emissions, as low as 1-5% tailpipe NOx of a conventional SI engine.
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Impact of retarded spark timing on engine combustion, hydrocarbon emissions, and fast catalyst light-off
… stoichiometric resulted in the lowest observed tailpipe-out HC emissions. Retarded spark timings increased exhaust system oxidation, with port HC oxidation ranging from 15% to 37% with additional HC reductions (40-50%) in the runner for ATDC spark timings. Catalyst light-off times were reduced …
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Isolated Traffic Signal Optimization Considering Delay, Energy, and Environmental Impacts
… such as vehicle delay, fuel consumption and tailpipe emissions. Additionally, both studies validate the Webster model against simulated data. The microscopic simulation software, INTEGRATION, was used to simulate two-phase and four-phase isolated intersections over a range of cycle lengths, …
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Fabrication and Testing of a Heat Exchanger Module for Thermoelectric Power Generation in an Automobile Exhaust System
… In applying TEGs to the outside of the exhaust tailpipe of a vehicle, the difference in temperature between the hot exhaust gases and the automobile coolant can be used to generate a small amount of electrical power to be used in the vehicle. The amount of power is anticipated to be a few …
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Characterizing the evolution of the alternative fuel vehicle and infrastructure Nexus
… engine. In particular, vehicles with zero tailpipe emissions including plug-in electric vehicles and fuel cell electric vehicles (FCEVs) powered by hydrogen fuel have the potential to greatly reduce transportation emissions. However, adoption of these vehicles has grown slowly for a number …
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