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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 78 for “"Exhaust Emissions"”.
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Assessment of exhaust emissions from imported used Motor Vehicles
… the tailpipe emission tests conducted, the exhaust contents were CO, CO2, NOX, and HC. Lambda and O2 contents were also measured to establish whether the engines in the motor vehicles presented were operating at stoichiometry or sub-stoichiometry ratios. The average emission levels found …
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The Origin of Polycyclic Aromatic Hydrocarbons in Diesel Exhaust Emissions
Emission limits for diesel engine exhaust pollutants are being continually reduced in line with increasingly stringent emissions legislation. Essential to the task of reducing diesel exhaust emissions is an understanding of the origin of the exhaust pollutants. This research has investigated the …
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Pyrolysis oil combustion characteristics and exhaust emissions in a swirl-stabilized flame
… fuel for comparison. Gaseous and particulate exhaust emissions have been measured, and the particulate samples studied with scanning electron microscopy (SEM) to investigate morphology and composition. In-situ visualization studies have been performed by employing high speed imaging of flame …
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Characterization of exhaust emissions from catalyzed trap-equipped non-road heavy-duty diesel engines
An emissions and engine performance study was conducted to explore the effects of ultra low sulfur fuels on an off-road, heavy-duty engine retrofitted with catalyzed traps. The study was conducted, on an 8 cylinder, mechanically controlled Caterpillar 3408, rear engine of a Scraper. An in-field …
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Analysis of particulate matter concentration and size distribution in heavy-duty vehicle exhaust emissions
This study put forward a method to predict the concentration field in the plume of a heavy-duty truck, operating at highway speed. It provided information regarding computation of dispersion coefficients in the area near a stack.;The numerical cumulative frequency fit method obtained in this study …
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Characterization of infield vehicle activity data and exhaust emissions from diesel powered off-road vehicles
A study was conducted to determine brake-specific emissions from diesel-powered off-highway heavy equipment that were exercised on steady-state and transient cycles. Two vehicles were evaluated in this study, a streetsweeper (114 hp) and a rubber-tired loader (110 hp). Due to the lack of …
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Characterization of infield duty cycles and exhaust emissions from diesel powered off-road heavy-duty equipment
… develop, and evaluate techniques to measure exhaust emissions from diesel-powered off road equipment. Emissions data was collected from a Komatsu hydraulic excavator and a Caterpillar track-type tractor.;For the excavator, data was logged during in-field operation, and test cycles were …
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Plug-in Hybrid Electric Vehicle Supervisory Control Strategy Considerations for Engine Exhaust Emissions and Fuel Use
… 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 low …
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Mobile Laboratory Measurement of Black Carbon, Particulate Polycyclic Aromatic Hydrocarbons and Other Exhaust Emissions in Mexico City
… BC, PPAHs and many other gas- and particle-phase emissions were measured in Mexico City using a mobile laboratory during the Mexico City Metropolitan Area field campaign in April 2003 (MCMA-2003). The main goal of this research is to estimate emissions of BC and particulate PAHs (PPAHs) for Mexico …
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VEHICLES¿ NON-EXHAUST EMISSIONS: SETUP OF EXPERIMENTAL APPROACHES FOR ON-ROAD CHARACTERIZATION OF TIRE WEAR AND ROAD DUST PARTICLES
… led to notable reductions in vehicles’ tailpipe emissions; however, non-exhaust emissions (NEEs), particularly those from tire and road wear particles (TRWPs), have emerged as a dominant and under-investigated source of airborne particulate matter. TRWPs are mechanically generated, chemically …
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Characterization and Mobility of Brake Wear Dust from Traffic Non-Exhaust Emissions in Porous Media: Transport and Environmental Fate
L'abstract è presente nell'allegato / the abstract is in the attachment
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Determination of naval medium speed diesel engine air exhaust emissions amd [i.e., and] validation of a proposed estimation model
Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1995, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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The Fate of Naphthalene and n-Alkylnaphthalenes During Combustion, and an Evaluation of the Sources of these Compounds in Diesel Exhaust Emissions
… and an evaluation of their sources in diesel exhaust emissions. This was achieved by the use of a procedure which employed a [14C]radiolabelled PAH technique and a diesel enriched fuel technique (DEFT). The combustion of diesel fuel spiked with [14C]naphthalene has shown unequivocally that …
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Emissions reduction benefits of adapting electronic closed loop fueling control on a mechanically controlled spark-ignited engine
Recent government gaseous exhaust emissions regulations have been expanded to include a variety of mobile air pollution sources. Exhaust emissions from non-road engines have recently become a focus of Environmental Protection Agency (EPA) regulations. The term "non-road engines" covers many …
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The potential of dissociated methanol as a fuel for spark ignition engines
… to increase the thermal efficiency or reduce the exhaust emissions of an internal combustion engine. It is assumed that liquid methanol will be dissociated onboard a vehicle using engine waste heat to produce a gas consisting of hydrogen and carbon monoxide in a molar ratio of 2:1. Tests were …
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Analysis of oil flow mechanisms in internal combustion engines via high speed Laser Induced Fluorescence (LIF) spectroscopy
… of them with new more stringent regulations for exhaust emissions and fuel economy being implemented in the coming future. To make an impact on current emissions and fuel economy, new advanced analytical methods, such as high speed Laser Induced Fluorescence (LIF), must be employed when studying …
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ΣΥΣΧΕΤΙΣΗ ΠΑΡΑΜΕΤΡΩΝ ΛΕΙΤΟΥΡΓΙΑΣ ΚΙΝΗΤΗΡΩΝ ΑΥΤΟΚΙΝΗΤΩΝ ΠΡΟΣ ΤΗΝ ΠΟΙΟΤΗΤΑ ΤΟΥ ΚΑΥΣΑΕΡΙΟΥ
… AFFECTINGTHE ABOVE MENTIONED SYSTEMS ON EXHAUST EMISSION AND TO DEVELOP A SHORT TEST FOR EMISSION CONTROL. THE PROPER INSPECTION AND MAINTENANCE STRATEGY IN RELATION TO THE LEGISLATION ON ENVIRONMENTAL POLLUTION FROM EXHAUST EMISSIONS IS ALSO PRESENTED.
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Performance and emission characteristics of a gas-diesel engine
… very strong effects on thermal efficiency and exhaust emissions (ie. NOx, THC, CH₄, CO, CO₂ and BOSCH smoke index). The thermal efficiency and exhaust emissions were determined as a function of load (ie. BMEP). The thermal efficiency of the optimum gas-diesel operation was shown to exceed that …
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