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.
Results
Showing 1 to 15 of 15 for “"Driving Cycle"”.
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Driving cycle time reduction through an improved material flow process in the electronics assembly manufacturing cell
… cell, which was experiencing high levels of cycle time variability. To help reduce cycle times within the cell, a continuous improvement project was undertaken to improve the material flow process. A current state analysis of the process showed an opportunity to improve process …
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Development of a vehicle robotic driver with intelligent control system modelling for automated standard driving-cycle tests
… These tests are often carried out over specific driving-cycles. To carry out lab-based driving-cycle tests, a typical vehicle manufacturer will employ a trained driver to follow driving profiles on a chassis dynamometer. This project involves development of a robotic driver controller for the …
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Vehicle fuel economy benefit and aftertreatment requirement of an HCCI-SI engine system
… the benefit of implementing HCCI over driving cycle: * Power-to-weight ratio * Operation range of HCCI * Conditions of the driving cycle * Application of constraints that cause "un-natural" mode transitions * Application of transition penalties * Available after-treatment performance * …
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FRACTIONAL-SLOT CONCENTRATED-WINDING SURFACE-MOUNTED PERMANENT MAGNET MOTOR DESIGN AND ANALYSIS FOR IN-WHEEL APPLICATION
The study on the driving cycle and powertrain of electric vehicle presents the conclusion that there is a regular working area on efficiency map where electric motor works for the most time. Thus, two motivations are proposed: first, to evaluate the efficiency map of electric motor analytically, …
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Performance Evaluation of a Cascaded H-Bridge Multi Level Inverter Fed BLDC Motor Drive in an Electric Vehicle
… in an EV and make it follow a given drive cycle. The switching operation and control of a multi level inverter for specific power level and desired performance characteristics is investigated. The EV has been designed from scratch taking into consideration the various factors such as mass, …
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Comparison of heavy-duty diesel engine emissions between an on-road route and engine dynamometer simulated on-road cycle
… is currently employed. Current certification cycles provide for standardized comparisons, but may not be indicative of real-world emissions. Accurate in-use emissions testing would provide more realistic engine emissions values.;To examine the accuracy of the West Virginia University Mobile …
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A COMPREHENSIVE METHODOLOGY for the OPTIMIZATION of the OPERATING STRATEGY of HYBRID ELECTRIC VEHICLES
… the vehicle performance (including acceleration, driving range, operational flexibility and noise). With such a perspective, a simulation study was performed involving the implementation, in Matlab environment, of zero-dimensional models of a Series Hybrid Electric Vehicle (SHEV) and a Parallel …
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Methods for assessing the impact of silicon carbide traction inverters in electric vehicles
… and range of EVs are strongly influenced by its driving cycle, which determines the operating points of the traction inverter. These operating points, in turn, have a significant effect on the current harmonics generated by the traction inverter. Their distribution on the DC bus depends on the …
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Hydrogen : what fuel cell vehicles and advanced nuclear reactors have in common
… advantage over hybrid vehicles in urban driving cycle. Therefore, there is a strong justification for federal support for hybrid vehicles that will achieve similar results, quicker. The second issue focuses on another important technology and policy question related to large scale …
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Turbocharged engine operations using knock resistant fuel blends for engine efficiency improvements
… rpm in which vehicle is usually driven in the driving cycle. Then, knock onset of different ethanol-gasoline blends, from 0 % ethanol to 85 % ethanol contents with 91 RON gasoline, were determined. Generated engine fuel consumption maps with knock onset limits were utilized in a vehicle driving …
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Investigation and simulation of the Planetary Combination Hybrid Electric Vehicle
… engine, the motor and the alternator for a given driving cycle. Once the engine, motor and alternator speed and torque are calculated, HVSim uses efficiency maps of the engine and motor to define their efficiency. Using the instantaneous efficiency HVSim defines the power loss in each component …
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Modeling, analysis, simulation and real-time hardware in-the-loop implementation of hybrid/electric vehicles’ powertrain
… variables, but also implementing a daily real driving cycle to emulate exactly the same real driving environment. For a sound design, the developed model, which has low computational intensity, is utilized to determine the proper sizing and later the dynamic behavior of the main components such …
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Model-Based Control Development for an Advanced Thermal Management System for Automotive Powertrains
… in the coolant temperatures during the FTP driving cycle, compared to a baseline rule-based controller. Based on the preliminary results obtained, indications on the design of a state-space multi-variable feedback controller are made. This will further reduce the coolant temperature tracking …
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Development of mechanistic rolling resistance model for pavement life cycle assessment
… to achieve sustainable transportation. Life cycle assessment (LCA) quantifies the environmental impacts of a product. It has been shown that a major component of pavement LCA results from rolling resistance (RR) between vehicle-pavement interaction. This study focuses primarily on the …
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Design of a viable homogeneous-charge compression-ignition (HCCI) engine : a computational study with detailed chemical kinetics
… show the response of the engine during a normal driving cycle, were constructed to compare these engine designs. The simulations showed that an acceptably broad operating range can be achieved by using a low compression ratio, low octane fuel, and moderate boost pressure. An explanation of why …