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 10 of 10 for “"medium-duty"”.
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The assessment of using SI engines for medium-duty applications
… replacing a diesel engine with an SI engine in medium duty class 5 applications, where such a switch may have already began. The Ford F550 is offered with both diesel engine and gasoline engine option. From the Ford website, the price difference between the V-10 gasoline engine and the V-8 turbo …
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One-dimensional simulation of a retrofitted medium duty engine running using compressed natural gas
… experimental process and setup. In this study a medium duty 4.3L, 4- cylinder, 4-stroke retrofitted compression ignition engine (RE) model were used in this simulation work over various operational conditions at low engine speed. At the beginning of this study, the model was first compared with a …
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Advanced topologies of high step-up DC-DC converters for renewable energy applications
… including high voltage gain with low or medium duty cycle, a small number of components, low current and voltage stresses on the components, continuous input current with low ripple, and high efficiency. This research includes five new advanced high step-up DC-DC converters with detailed …
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Evaluation of power-assist hydraulic and electric hybrids for medium- and heavy-duty vehicle applications
… constraints, and new government regulations on medium- and heavy-duty vehicles, hybrid technologies for these classes of vehicles are becoming more prevalent. A variety of technologies have been proposed to meet these requirements including power-assist hybrid electric and hybrid hydraulic …
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Internal Damping Rates of Construction Cranes
… using logarithmic decrement technique. Light to medium duty cranes were tested with loads similar to those used in duty cycle operations. Damping tests were performed both perpendicular and parallel to the mast of the crane. Values were calculated from data extracted from videos of a payload …
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More effective use of fuel octane in a turbocharged gasoline engine : combustion, knock, vehicle impacts
… simulations for a passenger vehicle and a medium-duty truck. Parametric studies were conducted to analyze the effects of listed variables on the vehicle fuel consumption, ethanol usage, and average engine efficiency. Downsizing a naturally-aspirated engine by 50% resulted in about a 30% …
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HEAVY TRUCK COLLISION WITH BRIDGE PIERS
… trucks, which are typically classified as medium-duty vehicles weighing about 89 kN (20,000 lb). Yet, collision events that involve severe bridge damage are generally caused by heavy-duty trucks, generally tractor-semitrailers weighing 360 kN (80,000 lb). The handful of tests that were …
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Experimental Studies of Diesel Particle Filtration
… emissions and exhaust conditions of a light-duty engine showed that turbulent deposition of large agglomerates in the channels of flow-through monoliths is likely to make a contribution comparable to that expected for diffusion and gravitational settling. The number deposition efficiency of …
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Investigation of PM Formation and Evolution in Plumes Emitted by Heavy-Duty Diesel Vehicles: Wind Tunnel Study
… this, the study of the exhaust plume of a heavy-duty diesel vehicle operated inside a subsonic environmental wind tunnel can give us an idea of the dilution process and the representative emissions of the real-world scenario. The wind tunnel used for this study is capable of accommodating a …
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Modeling the impact of battery degradation within lifecycle cost based design optimization of heavy-duty hybrid electric vehicles
… This is particularly true in the heavy-duty vehicle space where the major challenges are: (i) greater emphasis on economic viability, (ii) reluctance to take on risk associated with new technologies, and (iii) numerous diverse applications that preclude a one-size-fits-all approach to …