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 12 of 12 for “"Automotive engines"”.
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Advanced Neural Network Based Control for Automotive Engines
… ratio (AFR) control of spark ignition(SI) engines. Three advanced neural network based control schemes are proposed: radial basis function(RBF) neural network based feedforward-feedback control scheme, RBF based model predictive control scheme, and diagonal recurrent neural network (DRNN) - …
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The effect of altitude on the performance of a spark ignition engine using an alcohol-blended fuel
… both the performance and octane requirement of automotive engines. With the peculiar elevated geography in South Africa, there has been concern of the effects of altitude on automotive engines, when driving between the coast and the Highveld. This thesis describes an experimental investigation …
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Novel design of a rotary valve using axiomatic design
… and for their potential applications, such as in automotive engines.
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Application of Multidisciplinary Design Optimisation to Engine Calibration Optimisation.
Automotive engines are becoming increasingly technically complex and associated legal emissions standards more restrictive, making the task of identifying optimum actuator settings to use significantly more difficult. Given these challenges, this research aims to develop a process for engine …
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Combustion optimization in a hydrogen-enhanced lean burn SI engine
Lean operation of spark ignition (SI) automotive engines offers attractive performance incentives. Lowered combustion temperatures inhibit NO[sub]x pollutant formation while reduced manifold throttling minimizes pumping losses, leading to higher efficiency. These benefits are offset by the reduced …
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Robust design evolution and impact of In-Cylinder Pressure Sensors to combustion control and optimization : a systems and strategy perspective
… closed loop control and monitoring of production automotive engines. Using the Robust Design framework as a compass, this thesis first checks the evidence for emergence followed by tracking the evolution of the sensor component itself and its application to robust closed loop control of the …
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Coupling of Chemical Kinetics with Computational Fluid Dynamics in a Three-Dimensional Engine Model
… to experimental studies for the optimization of automotive engines and the development of future fuels. Traditionally, computer models rely on simplified global reaction steps to simulate the combustion and pollutant formation inside the internal combustion engine. With the current interest in …
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The effects of operating conditions on the hydrodynamic lubricant film thickness at the piston-ring / cylinder liner interface of a firing diesel engine
… of piston-rings in internal combustion engines are performed at relatively low speeds and consider only steady state operation conditions. Loss of power in internal combustion (IC) engines is becoming an increasing issue when they are operated at high engine speeds. This project is …
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Customer Focussed Technology Selection Using Expert Opinion. Incorporating the 'Voice of the Customer' and Expert Opinion in Technology Selection.
… in the concept phase, to complex systems using automotive engines as case studies. In these systems the customer will not directly interact with the technologies but the technologies are applied to deliver the range of customer requirements individually or collectively. A standard tool, Quality …
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An Investigation into the impact of the spanwise flow field at rotor inlet on the performance of mixed flow turbines
Current driving trends have caused automotive engines to undergo a period of downsizing. Downsizing refers to a reduction in engine swept volume, which corresponds to a lower power output. To counteract this, downsized engines are increasingly equipped with turbochargers to increase the power …