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 27 for “"Gasoline Engine"”.
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Development of a high efficiency dilute gasoline engine
Development of a High Efficiency Dilute Gasoline Engine (HEDGE) and control system for use in the Challenge X design competition encompasses the body of this work. The HEDGE concept embodies running an engine on gasoline at Diesel-like compression ratios. This is accomplished through extreme …
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High compression ratio turbo gasoline engine operation using alcohol enhancement
Gasoline - ethanol blends were explored as a strategy to mitigate engine knock, a phenomena in spark ignition engine combustion when a portion of the end gas is compressed to the point of spontaneous auto-ignition. This auto-ignition is dangerous to the operation of an internal combustion engine, …
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Catalytic control of individual hydrocarbons from a small utility gasoline engine
… approval of emission standards for small utility engines by the California Air Resources Board suggested that substantial reductions in emissions from small utility engines will soon be required. Although the 1994 standards can be met by simple engine modifications, the 1999 standards may require …
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More effective use of fuel octane in a turbocharged gasoline engine : combustion, knock, vehicle impacts
… ratio, and downsizing a spark-ignition engine are well known strategies for improving vehicle fuel economy. However, such strategies result in higher in-cylinder pressures and temperatures which increase the likelihood of engine knock above that of naturally-aspirated engines. A high …
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Lean-burn characteristics of a gasoline engine enriched with hydrogen from a plasmatron fuel reformer
If a small amount of hydrogen is added to a gasoline fueled spark ignition engine the lean limit of the engine can be extended. Lean running engines are inherently more efficient, and have the potential for significantly lower NOx emissions. Hydrogen addition reduces the combustion variability. In …
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The evaluation of a one-cylinder Delco gasoline engine as an accelerated lubricating oil test unit
… desirable to build a single one-cylinder testing engine capable of manipulation so that it can test lubricating oils for wear, corrosion and tendency to oxidation and detergency, and give reproducible results. The purpose of this investigation is three-fold: (1) To install the control accessories …
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The assessment of using SI engines for medium-duty applications
… demand. The price differential of diesel and gasoline is accordingly projected to increase. As a consequence of the diesel fuel price premium, a diesel engine must be significantly more efficient in terms of gallon/mile or liter/km, just to make up for the higher fuel cost in the US market. In …
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EVALUATION OF TERAHERTZ TECHNOLOGY TO DETERMINE CHARACTERISTICS AND CONTAMINANTS IN ENGINE OIL
Engine oil is critical to tractor engine performance. Engine designers recommend farmers change engine oil depending on recommendations by engine manufacturers. Engine manufacturers did not take into account different tasks often performed by tractors in fields, like tillage or seeding. Farmers do …
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A comparison of the stresses in the crankshaft of an internal combustion engine as determined by using electrical resistance strain gages and by analytical methods
… in the crankshaft of an internal combustion engine, electrical resistance strain gauges were applied to the accessible parts of the crankshaft of a single-cylinder gasoline engine to sense the actual operating strains. From the recorded strains the operating stresses were determined and were …
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Lasermessverfahren zur Bestimmung von Geschwindigkeit und Kraftstoffverteilung bei motorischen Einspritzvorgängen
… boundary conditions in a direct injection gasoline engine. LFT in the liquid phase proves robust regarding ambient conditions like oxygen concentration and ambient pressure. However, the lifetime of the phosphorescence signal and, therefore, the accuracy of this technique are decreasing …
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Performance study on the effect of different exhaust length for motorcycle engine
… of the different exhaust length for motorcycle engine. The research also covers the effect in terms of emissions. The engine used was a motorcycle 125cc 4-stroke gasoline engine. There are two method was used; experiment and simulation. For experiment, load applied to the engine with different …
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Analog and digital control of an electronic throttle valve
… valve on a four-cylinder, spark-ignition gasoline engine. The first controller was designed using operational amplifiers and other analog componentry to realize a proportional-integral controller and feedback loop. The second controller utilized a programmable digital microcontroller to …
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Study of an internal combustion engine to burn hydrogen fuel and backfire elimination using a carburetor fuel delivery method
… vehicles, including internal combustion engine vehicles. In this research, a 1986 GMC Sierra truck with a 350CID 5.7L V8, 4 barrel carbureted Chevrolet gasoline engine is converted to burn hydrogen as a sustainable and envirnmentally benign fuel with a shorter energetic cycle. It …
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Comparison of performance and emission characteristics between ceramic and metallic catalytic converter
… solution to reduce exhaust emissions from gasoline engines where ceramic and metallic catalytic converters are the most common types of catalytic converter used. This study focuses to examine the performance of ceramic and metallic catalytic converters through simulation and experimental in …
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Investigation of alternative rotorcraft powerplant configurations for improving airframe performance
… increasing an aircraft's range. The helicopter's engine was the focus of this thesis, with emphasis on improving its specific power (power vs weight ratio), efficiency, performance in high altitude and temperature, or capabilities during engine failure. Gas turbines, used in the majority of …
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Investigation of alternative fuels for various applications: experimental and life cycle assessment studies
… sustainability and combustion performance in a gasoline engine. The experimental component investigated the enrichment of conventional fuels (gasoline, propane, methane) and alcohol fuels (ethanol, methanol) with pure hydrogen and oxyhydrogen (HHO) at volumetric mix ratios of up to 20%. …
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The catalytic reduction of emissions from a natural gas fueled spark ignited engine
Activity in converting gasoline engines to operate on natural gas has increased in recent years due to the passage of The Clean Air Act of 1990 and The National Energy Policy in 1992 (EP ACT). Both policies require companies with large vehicle fleets to purchase a number of alternatively fueled …
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Tribopolymerization as an approach to two-stroke engine lubrication
… to investigate the current status of two-cycle gasoline engines from the standpoint of design, performance, benefits, lubrication and emissions. The two-stroke engine offers several significant advantages over its four-stroke counterpart, which include: simple design, low production cost, higher …
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Exploring the use of a higher octane gasoline for the U.S. light-duty vehicle fleet
… produced and offered a grade of higher-octane gasoline to the consumer market. The octane number of a fuel represents how resistant the fuel is to auto-ignition, which causes knock. By raising the octane number of gasoline, engine knock constraints are reduced, so that new spark-ignition …
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