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 29 for “"Injection Strategy"”.
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Effects of fuel injection strategy on HC emissions during SI engine start-up
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1992.
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Application of dynamic optimization methods for foam floods in stratified reservoirs
… in oil recovery and develop an optimum field injection strategy based upon various objective functions. In the process, the impact of initial waterflooding and varying foam strength on the optimum project termination time, as well as the sensitivity of foam parameters on the optimum field …
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Mixing and Combustion Studies in an Optically-Accessible Small-Bore High-Speed Direct -Injection Diesel Engine
… diesel engine equipped with a Bosch common-rail injection system was used to study the effects of injection strategies on mixing and combustion. A single main and multiple injection strategy were investigated in this study, varying injection pressures and first injection timings and quantities. …
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Effect of market fuel variation and cetane improvers on CAI combustion in a GDI engine
… additives on CAI combustion in a gasoline direct injection (GDI) engine. The test fuels were blends of different commercial refinery products, containing hundreds of hydrocarbon species. The blends were selected to vary Research Octane Number (RON), olen content, and aromatic content. The blends …
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Optimizing conventional combustion and implementing low-temperature combustion of biodiesel in a common-rail high-speed direct-injection engine
… gas recirculation (EGR) ratio and start of injection (SOI) timing, as these parameters are easily modified and have significant effects on engine emissions. Tests were run at low to moderate engine load at different engine speeds. It was found that with the ECM’s default settings, higher …
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Investigation of Emission Characteristics during Low Temperature Combustion using Multivariate Adaptive Regression Splines
… significantly affected by fuel composition and injection strategy. The starting point of this study is a collection of data correlating injection system parameters, and fuel characteristics, to response parameters such as engine-out emissions (oxides of nitrogen (NOx), total particulate matter …
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Effects of split injection and exhaust gas recirculation strategies on combustion and emissions characteristics in a modern V6 diesel engine
… engine emissions through the combined effects of injection strategy (fuel injection pressure, dwell period, pilot fuel quantity) and cooled Exhaust Gas Recirculation (EGR) on a modern V6 common rail direct injection diesel engine. In the case of using EGR (49–52%) at 1500 rpm and 10% of engine …
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Low Temperature Combustion and Emissions of Diesel with Additions of N-Butanol in a Direct Injection Compression Engine
… premixed combustion by means of an original injection strategy. This strategy is based on introducing an early injection of n-butanol in the intake manifold at the start of the intake stroke, followed by a conventional injection close to the compression top dead center. The results obtained …
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EFFICIENT APPROACHES FOR QUBIT MAPPING ON NISQ COMPUTERS
… Algorithm (HRA) searches for an optimal swapping injection strategy. We evaluate the proposed algorithms on the IBM-provided Noisy Intermediate-Scale Quantum (NISQ) computer, using a dataset consisting of 17 different quantum circuits of various sizes. The circuits are executed on the IBM Toronto …
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In cylinder liquid fuel visualization during cold start
In recent years carburetor injection systems in spark ignited (SI) engines have been replaced with port-fuel injection systems, and as a result there has been a significant increase in the levels of hydrocarbon (HC) emissions from SI engines during their cold start period. The presence of liquid …
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Integrative Geophysical and Environmental Monitoring of a CO2 Sequestration and Enhanced Coalbed Methane Recovery Test in Central Appalachia
… Virginia. The test involves two phases of CO2 injection operations. Phase I was conducted from July 2, 2015 to April 15, 2016, and injected a total of 10, 601 tons of CO2. After a reservoir soaking period of seven months, Phase II is scheduled to begin Fall 2016. The design of the monitoring …
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Application of Multidisciplinary Design Optimisation Frameworks for Engine Mapping and Calibration
… of a sequential Design of Experiment (DoE) strategy to enhance the steady state engine mapping process, and 2) application of different MDO architectures to optimally calibrate the complex engine applications. The validation of this research is based on two case studies, the mapping and …
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Impact of Water Injection on Emissions of Nitrogen Oxides from Aircraft Engines
… NOₓ production. In previous studies, water injection has been simulated on existing engine models instead of co-optimizing the engine cycle and design characteristics for this technology. This thesis uses pyCycle, a gas turbine cycle analysis tool, to optimize an engine cycle based on this …
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Effect of start injection toward combustion, performances and emision characteristic of B20 biodiesel fuel
… ignition engine with 320 cc four strokes direct injection has been used to carry out to characterize the combustion of biodiesel fuel. The performance and exhaust emission have been tested with blended B10 biodiesel (10% POME and 90% pure diesel) and compared with B20 biodiesel (20% POME and 80% …
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Improvement of Carbon Dioxide EOR in Water-Wet Reservoirs by Using Active Carbonated Water
CO2 injection for enhanced oil recovery has been widely and successfully used in many oil fields. The drawbacks of conventional CO2 injection are high mobility and gravity segregation, which lead to low sweep efficiency in the reservoir. Particularly in strongly water-wet reservoirs, a significant …
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Stability, transport and applications of polyaphrons in porous media
… DCB during surfactant flooding. Depending on the injection strategy and initial distribution of DCB, as mush as 97% of the DCB entrapped in the sand column is removed, most of which is in a bulk organic phase lighter than water. Since the coalescence between aphrons is a crucial step in the …
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Pathways for Low Emissions Utilizing Spray Targeted Reactivity Stratification (STARS) in High Efficiency Natural Gas Dual Fuel Combustion
… combustion (LTC), which can be used as a strategy to reduce engine-out emissions and increase engine efficiencies. Dual fuel LTC uses two different fuels, a high reactivity fuel (HRF) and a low reactivity fuel (LRF). The HRF has a higher cetane number than the LRF, which allows for easier …
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Investigation of combustion and emission characteristics of a diesel engine fueled with butanol-diesel blends
… was tested on a 2.7 L V6 common rail direction injection diesel engine equipped with an EGR system. The test was carried out under two engine loads at a constant engine speed, using various combinations of EGR ratios and injection timings. Test results indicate that butanol addition to engine …
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Numerical Simulation and Optimization of CO2 Sequestration in Saline Aquifers
… efficiency is highly dependent on the injection strategy which includes injection rate, injection pressure, type of injection well employed and its orientation etc. The goal of GCS is to maximize the sequestration capacity and minimize the plume migration by optimizing the GCS operation …
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Role of connate water salinity in gas dispersion during enhanced gas recovery by carbon dioxide injection and sequestration
… thedisplacement which helped develop a robust injection strategy for displacement of the CH4with minimum contamination by providing an optimum injection rate ranges for thisapplication. Phase II involved core flooding process to simulate the displacement of CH4 by CO2 that wascarried out at …
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