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 7 of 7 for “"engine durability"”.
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PCV valve flutter : vibration characterization through pressure and flow
… or PCV, valve is required by internal combustion engines in order to regulate the flow of blow-by gases out of the crankcase and into the intake air stream. Fluctuations in the pressure and flow of these gases lead to poor performance and can be detrimental to engine durability. This thesis …
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Intricate dynamics and hydrodynamic frictional losses of the piston-ring assembly in internal combustion engines
<p>Frictional losses in internal combustion engines approximately account for 10% of the expended fuel energy. Moreover, forty percent of these losses are attributed to the reciprocating motion of the piston-assembly. Besides the adverse effect of friction on fuel economy, the intricate dynamics of …
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Enhanced engine efficiency through subsystem lubricant viscosity investigations
… the potential benefits in fuel efficiency, engine emissions, lubricant longevity, and engine durability. Two experimental testing platforms were designed and implemented to empirically study the effects of lubricant formulations on the internal combustion engine's frictional losses. A …
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A deterministic model for wear of piston ring and liner and a machine learning-based model for engine oil emissions
… are required for design of internal combustion engines, to meet the energy saving and the emissions standards in the new era. Engine emissions and engine durability are two of the most important factors in the development of IC engines. Engine particulate emissions are strongly correlated with …
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Design and prototype of dual loop lubricant system to improve engine fuel economy, emissions, and oil drain interval
… harmful emissions from internal combustion engines place constraints on lubricant formulations necessary for controlling wear and reducing friction. Viscosity reduction results in fuel economy improvement, with benefits of up to three percent reported in some studies. Such reductions are …
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Technical and economic evaluation of triglyceride gasoline blends as an alternative fuel for diesel engines
… Triglyceride gasoline blends (TGBs) in a diesel engine. Canola straight vegetable oil (SVO) is highly viscous and has poor flow ability in cold weather. Consequently, it cannot be used in diesel engines without modification to the fuel system. Blending regular unleaded gasoline (10% by volume) to …
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Three-dimensional modeling of sealing and wear of XTS-210 engine Apex seals
Rotary engines offer a compact, lightweight alternative to conventional reciprocating engines, with advantages such as high power density and fewer moving parts. However, traditional rotary engines such as the Wankel have drawbacks such as excessive seal wear, combustion gas leaks and limited …