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 41 for “"engine out"”.
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Modeling of engine-out HC emissions for prototype production
… Institute of Technology, Dept. of Ocean Engineering, 1994.
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Optimized Engine Out Procedures to Extend the Range of Jet Transport Airplanes
… purpose of this study was to develop optimum engine-out procedures for the Boeing 747 and 767 on extended flights that will increase the range of the aircraft in case of engine failure. Theory suggests that an optimum amount of bank angle that will minimize drag resulting from asymmetric …
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Crank angle and space resolved, speciated sampling of engine-out exhaust hydrocarbons
… Institute of Technology, Dept. of Mechanical Engineering, 1996.
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The effects of crevices on the engine-out hydrocarbon emissions in spark ignition engines
… Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Effect of in-cylinder liquid fuel films on engine-out unburned hydrocarbon emissions for SI engines
… a modern gasoline-fueled vehicle occur when the engine is first started. One important contributing factor to this is the fact that, during this time, temperatures throughout the engine are low - below the point at which all of the components of the gasoline can readily vaporize. Consequently, …
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CFD Modelling of Down-Sized GDI Engines: Fuel Injection, In-Cylinder Phenomena and Correlation to Engine-Out PN Emissions
… in modern-design Gasoline Direct Injection engines. It does that through the development of a comprehensive 3D-CFD in-cylinder modelling tool that enables a robust and accurate insight into the pre-combustion mechanisms potentially leading to PM formation. The results presented refer to …
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Engine placement for manned descent at Mars considering single engine failures
… scale to large masses. The placement of these engines on a lander is subject to many concerns such as heat shield packing, cargo handling, and engine out mitigation. Engine out mitigation is of considerable interest because configurations that improve failure mitigation tend to be poorer for …
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Ionization In Diesel Combustion For On-Board Diagnostics And Engine Control
<p>Diesel engines have been known for their high thermal efficiency and specific power output, but there is concern about engine-out NOx and particulate matter emissions. To meet the current emission standards, advanced diesel engines are fitted with electronically controlled fuel injection systems …
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Trim, Control, and Performance Effects in Variable-Complexity High-Speed Civil Transport Design
… and thickness distribution, fuselage shape, engine placement and thrust, using 29 design variables. While adding trim and control it was found necessary to simultaneously consider landing gear integration. We include the engine-out and crosswind landing requirements, as well as engine nacelle …
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Fuel/air Mixing and Nitrogen Oxide Formation in a Lean Premixed Gas Turbine Combustor
… design tool model was developed to predict engine-out NOx concentrations for lean premixed combustors. The CRM model only requires information regarding the reactor loading, the combustor inlet state, and the combustor geometry. Model improvements were obtained by including the effects of …
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Cold start fuel management of port-fuel-injected internal combustion engines
… in fueling strategy in the second cycle of engine operation influence the delivered charge fuel mass and engine out hydrocarbon (EOHC) emissions in that and subsequent cycles. Close attention will be paid to cycle-to-cycle interaction of the fueling strategy. It is our intent to see if …
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Combustion Visualization And Particulate Matter Emission Of A Gdi Engine By Using Gasoline And E85
<p>In order to increase engine efficiency as well as to reduce emission, optimizing combustion is always the challenge in research and product development. Gasoline direct injection (GDI) engines have been popularized due to its higher power density, fuel efficiency, and the possibility for …
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Synergistic effects of lubricant additive chemistry on ash properties impacting diesel particulate filter flow resistance and catalyst performance
… particulate emission regulations. Overtime, engine-out particulate matter composed of soot and incombustible ash accumulate within the DPF. Although soot can be removed by oxidation, ash remains within the filter and substantially accumulates over time leading to increased flow restriction …
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Physics-Based Artificial Intelligence Models for Vehicle Emissions Prediction
… is developed to predict and analyze trends in engine-out 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 …
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Design, set up and commissioning of a test facility for smokeless rich diesel combustion research
… fuel formulations on LTC, using a suitable engine test platform. The objective of this study was to design and set up a test apparatus capable of achieving LTC in a diesel research engine, that could subsequently be used to study LTC behaviour with different fuels. In addition, it was …
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Formation mechanisms of combustion chamber deposits
… are found in virtually all internal combustion engines after a few hundred hours of operation. Deposits form on cylinder, piston, and head surfaces that are in contact with fuel-air mixture during the engine cycle. The effects of deposits include increased engine-out NOx emissions, octane …
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Effect Of Cetane Number And Volatility On Autoignition And Combustion Of Alternative Fuels And Their Surrogates
<p>Diesel engine has become a popular choice for trucks, trains, boats, and most other heavy-duty applications. The inherent benefits of diesel engine are high thermal efficiency and specific power output, but there is a concern about high levels of engine-out NOx and particulate matter emissions, …
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Evaluating heavy-duty diesel engine aftertreatment devices with a split exhaust configuration
… catalyst was sized to accommodate half of the engine exhaust flow. Simultaneous catalyst aging was then achieved by splitting the engine exhaust into two streams such that approximately half of the total exhaust flowed through the DOC and half through the lean-NOx catalyst. This necessitated …
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Real-time measurement of oxides of nitrogen from heavy-duty diesel engines
… requirements imposed on modern diesel engines encourage the development of improved tools for emissions measurements. This study investigated one of the improved tools for NOx emissions measurement. Objectives of this thesis included measurement, comparison and prediction of NOx …
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Investigations on the pollutant emissions of gasoline direct injection engines during cold-start
… downsized gasoline direct injection (GDI) engine provides a mature platform to achieve better fuel economy. For this reason, it is expected that the GDI engine will capture increasing shares of the market during the coming years. The in-cylinder liquid injection, though advantageous in most …
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