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 20 of 38 for “"Drive Cycles"”.
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Characterisation of vehicle drive cycles for peak hour traffic: implications for emissions modelling
… of links with respect to measured driving cycles and physical link attributes, in order to assess whether link characterisation can assist in the prediction of emissions to the wider road net. Also, to examine vehicle emissions at the scale of individual roads for peak hour travel periods …
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Development and Testing of a Hybrid Vehicle Energy Management Strategy
… reduce energy consumption while maintaining the drive quality targets of a conventional vehicle. A comprehensive model of the hybrid powertrain and vehicle physics is constructed to aid in the development of the control strategy. To improve fuel efficiency, a Willans line model is developed for …
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Willans Line Modeling for Powertrain Analysis and Energy Consumption of Electric Vehicles
… future vehicle designs over the US certification drive cycles. This work focuses on utilizing the well-established Willans line approximation and proposes a simplified modeling method to determine electric vehicle energy consumption and powertrain efficiency. First, a backwards physics-based model …
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Modeling Diesel Bus Fuel Consumption and Dynamically Optimizing Bus Scheduling Efficiency
… measurements that are derived by creating drive cycles from acceleration information producing an average estimation error of 22%. These higher errors are attributed to the errors associated with constructing the in-field drive cycles given that they are not available. In the case of the …
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Experimental investigation and modeling of lithium-ion battery cells and packs for electric vehicles
… the thermal performance of a realistic drive cycle collected from an EV at different environment temperatures. In the third part of the research, an electrochemical battery thermal model is developed for a large sized prismatic lithium-ion battery under different C-rates. This model is …
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The effects of drive cycle accessory load and degree of hybridization on fuel economy and emissions for hybrid electric buses
… on fuel economy was identified. Four different drive cycles - Manhattan, UDDS, CBD, and WVU City cycles - that covered a wide range of driving conditions were chosen as the testing cycles for the simulations. For no accessory load, it was found that the PHEB1, which had the highest degree of …
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Predicting hybrid vehicle fuel economy and emissions with neural network models trained with real world data
… These models simulate aspects of real-world drive cycles that include the driving environment, thermal management, driver input, and powertrain component behavior. In this study, an alternative method of hybrid vehicle FE simulation is developed by training and testing a time series neural …
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The effects of driving style and vehicle performance on the real-world fuel consumption of U.S. light-duty vehicles
… factors provide a tool for comparing drive cycles and evaluating the real-world driving patterns. Second, driving data from two U.S. sources was used to 1) provide illustrative examples of real world driving and 2) assess the relationship between driving aggressiveness and vehicle …
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Modeling Light Duty Vehicle Emissions Based on Instantaneous Speed and Acceleration Levels
… model was found to reflect differences in drive cycles in a fashion that was consistent with field observations. Specifically, the model accurately captures the increase in emissions for aggressive acceleration drive cycles in comparison with other drive cycles. The dissertation also …
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Development of a Supervisory Control Unit for a Series Plug-in Hybrid Electric Vehicle
… the vehicles energy consumption on simulated EPA drive cycles.</p>
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Sensing, Actuation, and Embedded Control for a Custom SCR Nitrogen Oxides Emissions Reduction System
… within bounds ensuring low emissions for varied drive cycles. We developed a controller network using user datagram protocol to collect engine data using Arduino. The controller network establishes communication link between sensor data collection and a raspberry pi controller to enable full …
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Design and energy analysis of a hybrid electric natural gas vehicle
… powertrains. A comparison with established SAE drive cycles was effected to illustrate the feasibility of the proposed simulation processes. (Abstract shortened by UMI.)
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Development of a Testbed for Evaluation of Electric Vehicle Drive Performance
… testbed for the evaluation of inverter fed motor drives used in electric vehicles. The testbed consists of a computer-controlled dynamometer connected to power analysis and data collection tools. The programming and operation and of the testbed is covered. Then it is used to evaluate three pairs …
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Optimization of the Control Strategy for a Range Extender Vehicle
… State of Charge. Furthermore, customer related drive cycles are taken into account to analyze the control strategy.
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Design and development of advanced machine learning algorithms for lithium-ion battery state-of-charge estimation
… performance is evaluated using data from two drive cycles.
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Simulation of heavy-duty hybrid electric vehicles
… hybrid electric vehicles over various driving cycles in an attempt to optimize their design and control. The fuel economy data thus obtained were compared with those of the in-use heavy-duty hybrid electric vehicles. For this the drive cycles are modified to represent realistic expectations of …
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Evaluating Trends in Light-Duty Vehicle Technologies to Project Fuel Economy
… and the Environmental Protection Agency's drive cycles. Fuel economy for internal combustion engine vehicles (ICEVs), hybrid electric vehicles (HEVs), and battery electric vehicles (BEVs) are projected to increase at rates similar to past years. At these rates, average HEVs and BEVs will …
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Development of a Parallel Hybrid Energy Management Strategy with Consideration of Drive Quality and State of Charge Dynamics
… engine loading and one pedal strategies. Vehicle drive quality with the hybrid control strategy is analyzed, with acceleration and jerk managed through axle torque rate limits and filters. The simulated control strategy for the hybrid vehicle has an energy consumption reduction of 20% for the Hot …
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Willans Line Based Equivalent Consumption Minimization Strategy for Charge Sustaining Hybrid Electric Vehicle
… to output power relationship for powertrain and drivetrain components with a linear relationship and a constant offset. The hybrid electric vehicle model performance is characterized using three Willans line models in the equivalent consumption minimization strategy. The slope of the Willans line …
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Optimum hybrid vehicle configurations for heavy duty applications
… in Microsoft Excel over a variety of driving cycles to attempt to optimize their design and control. The drive cycles are modified to represent realistic expectations of the dynamic performance of vehicles from each class. Two types of hybrid powertrains are simulated. The series HEV is …
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