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 34 for “"hydrocarbon emissions"”.
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Liquid fuel hydrocarbon emissions mechanisms in spark-ignition engines
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
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Effect of oil age on polyaromatic hydrocarbon emissions from automobiles
Automobiles are known to emit polyaromatic hydrocarbons. The literature indicates that the emission levels of these compounds are correlated with oil age, and it has been hypothesized that entry of oil into the combustion chamber is a major cause of these emissions. This experiment investigated the …
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Fuel component effects on hydrocarbon emissions from a spark-ignition engine
… using gas chromatography methods. Different hydrocarbon exhaust species were identified and quantified, and trends in any of these species were noted. The final results do indicate increasing trends in 2MP from the MTBE- and iso-octane- perturbed fuel blends. The sensitivity factor for the …
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The Effects of Increased Ignition Energy on Cold Start Hydrocarbon Emissions
… of increased ignition energy on cold start hydrocarbon emissions was conducted. The tests were conducted on a single cylinder ASTM-CFR engine. The engine was outfitted with EFI, exhaust analyzers, and temperature probes. The engine was also modified to produce cold start conditions rapidly …
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Assessing the hydrocarbon emissions in a homogeneous direct injection spark ignited engine
For the purpose of researching hydrocarbon (HC) emissions in a direct-injection spark ignited (DISI) engine, five experiments were performed. These experiments clarified the role of coolant temperature, injection pressure, and injection timing in HC emissions; the final two experiments illustrated …
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Chemical kinetic modeling of oxidation of hydrocarbon emissions in spark ignition engines
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Combustion chamber deposit effects on hydrocarbon emissions from a spark-ignition engine
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Hydrocarbon emissions in a homogeneous direct-injection spark engine : gasoline and gasohol
In order to better understand the effects on hydrocarbon emissions of loading, engine temperature, fuel type, and injection timing, a series of experiments was performed. The effect of loading was observed by running the engine at a higher temperature and more open throttle than would typically be …
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Contribution of oil layer mechanism to the hydrocarbon emissions from spark-ignition engines
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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The effects of crevices on the engine-out hydrocarbon emissions in spark ignition engines
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Impact of retarded spark timing on engine combustion, hydrocarbon emissions, and fast catalyst light-off
… substantial spark retard on engine combustion, hydrocarbon (HC) emissions, feed gas enthalpy, and catalyst light-off. Engine experiments were conducted at cold engine conditions for various ignition timings and air/ fuel ratios. Chemical and thermal energy of the exhaust gas was tracked from …
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Control strategy for hydrocarbon emissions in turbocharged direct injection spark ignition engines during cold-start
Gasoline consumption and pollutant emissions from transportation are costly and have serious, demonstrated environmental and health impacts. Downsized, turbocharged direct-injection spark ignition (DISI) gasoline engines consume less fuel and achieve superior performance compared with conventional …
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Effect of in-cylinder liquid fuel films on engine-out unburned hydrocarbon emissions for SI engines
Nearly all of the hydrocarbon emissions from 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 …
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Measurement of total hydrocarbon emissions with MEMS using a portable FID and a novel exhaust flow meter
… to evaluate tools for in-field, on-board engine emissions measurements, namely, a Signal Model 3030PM hydrocarbon analyzer and McCrometer's V-Cone flow meter. The Signal Model 3030PM analyzer uses a heated flame ionizing detection scheme to measure hydrocarbons. The V-Cone is an obstructive, …
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Fuel effects on driveability and hydrocarbon emissions of spark-ignition engines during starting and warm-up processes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Reducing cold start hydrocarbon emissions from port fuel injected spark ignition engines with improved management of hardware & controls
… investigate strategies for reducing cold start hydrocarbon (HC) emissions from port fuel injected (PFI) spark ignition (SI) engines with better use of existing hardware and control systems. Engine experiments and computer simulations were used for three major phases of the project: the effect of …
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Effect of fuel volatility on fuel vaporization, combustion quality, and hydrocarbon emissions during starting and warm-up in spark-ignition engines
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Fuel metering effects on hydrocarbon emissions and engine stability during cranking and start-up in a port fuel injected spark ignition engine
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.
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Multicomponent Liquid and Vapor Fuel Distribution Measurements in the Cylinder of a Port -Injected, Spark -Ignition Engine
… the compression stroke, a likely cause of high hydrocarbon emissions.
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Predicting hydrocarbon nuisance odours from petroleum storage tank emissions
This study focused on predicting hydrocarbon emissions that may lead to nuisance odour complaints, specifically in Alberta’s Peace River Oil Sands areas. These emissions were calculated from monthly gas production flow rates into the closest heavy-oil production systems to the odour complaint …
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