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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 64 for “"Engineering, Automotive"”.
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Characterization of Mechanical Properties of Gamma Irradiated Additively Manufactured Articles for In-Space Manufacturing
… across various industries, such as medical, bio-engineering, automotive and recently, aerospace. In an effort to contribute to the development of AM in aerospace industry, a series of experiments were designed to help understand the behavior of 3D printed parts and extend its capabilities and …
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Subdivision and manifold techniques for isogeometric design and analysis of surfaces
… defined on them are of great importance in engineering applications, e.g., structural engineering, automotive and aerospace. This thesis focuses on isogeometric design and analysis of surfaces, which aims to integrate engineering design and analysis by using the same representation for both. …
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Laser shadowgraph study of early flame propagation in swirling flows near the lean misfire limit.
The effects of swirling flow and spark locations on the specific rate of growth of flame area, the flame speed and the convection velocity are investigated experimentally in a constant volume vessel near the lean misfire limit for an equivalence ratio of 0.645 using the shadowgraph technique. The …
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Cord-Reinforced Cylindrical Shells
In this work, an analytical approach is used to develop the equations for the displacements from the loads on a cord-reinforced cylindrical shell. The load-deformation relations are developed by considering the mechanics of the matrix, the cords, and the shell. The matrix is modeled using the …
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Applications of Stereoscopic Vision to Agriculture
Two applications of stereovision for automatic guidance of agricultural vehicles were conceived. The first one employed disparity images together with regression analysis to find the vehicle's directrix. Problems appeared with poor correlated lines and vertical lines. A modification in the …
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Autonomous Machine Vision for Off -Road Vehicles in Unstructured Fields
This research proved the feasibility of the machine vision applications in the three targeted problems, and has shown that machine vision is capable of navigating agricultural vehicles in open field environments.
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Motion Coordination and Performance Analysis of Multiple Vehicle Systems
The last problem addressed is that of the deployment of an environment monitoring network of mobile sensors to improve the network lifetime and sensing quality. A distributed algorithm is presented that improves the system's performance starting from an initial deployment.
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Single- and Two -Photon Fluorescence for the Detection of Nitric Oxide in an Optically-Accessible Direct -Injection Diesel Engine
Second, a two-photon NO LIF technique was developed and applied to study NO concentrations within the cylinder of the SCORE. This represents the first known application of two-photon NO LIF in an internal-combustion engine. The technique avoids many of the problems associated with in cylinder, …
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Dynamic Friction Characterization of Tripod Constant Velocity (Cv) Joints: Experiments, Analysis and Modeling
The main goal of this thesis is to develop a physics-based internal friction model of tripod CV joints that can be readily applied during new vehicle development. This model will replace current practices of using empirical fixed friction coefficient values. In order to achieve this goal, a …
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Low-Temperature Combustion in a Small-Bore High-Speed Direct Injection Optically Accessible Diesel Engine
Experiments with renewable bio-diesel fuels were conducted, too. Less luminous flame was observed for bio-diesel fuel blends showing a lower soot formation rate. The flame luminosity decreased faster for bio-diesel fuel indicating a faster soot oxidation rate. The increased NOx emissions of …
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Investigation of Clean Diesel Combustion With Oxygenated Fuels in a Constant -Volume Combustion Chamber Using Forward Illumination Light Extinction Technique
The mechanism of soot reduction from oxygenated fuels was explored. DBM and TPME oxygenated fuels with 7% oxygen by weight were studied and have shown different soot reduction performances at different diesel combustion modes. In the premixed combustion mode, the higher oxygen efficiency from TPME …
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Development of a Transient System Model of Mobile Air-Conditioning Systems
An important part of the system model is calculating the refrigerant properties correctly. We developed refrigerant property routines to the calculate equilibrium thermodynamic properties in the liquid, vapor, two-phase liquid-vapor, and supercritical region using the Modified-Benedict-Webb-Rubin …
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Fuel Preparation in the Cylinder of a Port-Injected, Spark Ignition Engine
Liquid fuel in the cylinder was found to be the primary cause of inhomogeneity in the fuel distribution and therefore a principal contributor to HC emission. Much more liquid enters the cylinder with open-valve injection than with closed-valve injection. For some conditions a significant amount of …
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A Study of Solidification With a Rotating Magnetic Field
We then simulate the experiments using the numerical model. The numerical model predicts macrosegregation effects similar to those observed in the experiments. The temperature traces obtained from experiments and predicted by the numerical calculations also agree very well. We extend the numerical …
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The Constitutive Behavior of Thick Thermal Barrier Coatings
Plasma-sprayed thick thermal barrier coatings on the order of a millimeter are currently being developed for use in diesel engines with operating temperatures of about 800°C. In this environment, coatings will be subjected to thermomechanical compressive strain cycles that correspond to the …
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Modeling of Multicomponent Fuel Vaporization in Internal Combustion Engines
Finally, a preliminary study on modeling micro-explosions and flash boiling was performed. These two phenomena were modeled using a bubble-droplet system. A description was formulated to predict bubble growth and was verified using experiment data. Both the breakup due to aerodynamical force and …
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Modeling the Behavior of a Type-319 Aluminum Alloy During Quenching
Desired weight savings in automobiles has led to an increase in the use of cast aluminum parts in engine applications. To achieve the strength required in these applications, parts must be heat treated prior to service. This heat treatment involves a severe quench that can cause large thermal …
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Mass Rate of Combustion and Pressure Development in a Constant Volume Combustion Chamber
Made available in DSpace on 2014-12-05T19:15:52Z (GMT). No. of bitstreams: 1 0018167.pdf: 5012489 bytes, checksum: 6bf3b763cc66715220f8938a4767a1a2 (MD5) Previous issue date: 1956
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Thermal properties of combustion chamber deposits and their effect on engine heat transfer and octane requirement increase
An investigation of the thermal properties of combustion chamber deposits and their effect on engine heat transfer and Octane Requirement Increase (ORI) has been completed. Deposits were grown in a Chrysler 4-cylinder 2.2 liter engine with total test times of 50- and 250-hours. Two fuels were used, …
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Effect of Fuel Volatility on Mixture Distribution in a v-8 Automotive Engine
Made available in DSpace on 2015-05-12T17:06:22Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0023375.PDF: 8533081 bytes, checksum: 8269993b9c4f67f90449bc2a60c9bb21 (MD5) Previous issue date: 1957
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