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 19 of 19 for “"Dynamometer Test"”.
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Development of a heavy-duty vehicle chassis dynamometer test route
A heavy duty vehicle chassis dynamometer driving route, titled "City-Suburban Heavy Vehicle Route" (CSHVR) was developed. Data for designing the CSHVR were collected using a Campbell Scientific 21x. Procedures were developed to reduce statistically the speed and time data into representative speed …
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Understanding the challenges in HEV 5-cycle fuel economy calculations based on dynamometer test data
EPA testing methods for calculation of fuel economy label ratings, which were revised beginning in 2008, use equations that weight the contributions of fuel consumption results from multiple dynamometer tests to synthesize city and highway estimates that reflect average U.S. driving patterns. The …
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Comparison of engine and chassis dynamometer test methods for three heavy-duty vehicles emissions characterization, A
Includes bibliographical references (pages 135-140).
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Developing a HIL-Based Software Platform for Testing Electric and Hybrid Vehicle Powertrains
<p>The objective of this thesis is to present a dynamometer test stand with hardware in the loop (HIL) testing capabilities for the evaluation of electric and hybrid vehicle powertrains under realistic driving conditions. The traction inverter and dc/dc converter are two crucial subsystems of the …
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Rotating Inertia Impact on Propulsion and Regenerative Braking for Electric Motor Driven Vehicles
… all-wheel drive (AWD) cases. On-road driving and dynamometer tests are different since only one axle (two wheels) is rotating in the latter case, instead of two axles (four wheels). The differences between an on-road test and a dynamometer test are estimated using the developed model. The results …
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Development of a Hybrid Vehicle Powertrain Test Laboratory
… Aeronautical University</a> has installed and tested a fully functional eddy-current chassis dynamometer testing facility on campus. An automotive test facility requires a systems engineering approach to install, calibrate and commission a chassis dynamometer. This thesis shows that, the …
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The effect of altitude on the performance of a spark ignition engine using an alcohol-blended fuel
… under three different carburation settings. Tests have been performed in an altitude simulation dynamometer test cell. Comparative assessments are made of the effects of altitude on fuel economy, exhaust CO emission and engine knock response in terms of knock-limited spark advance with- a …
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Characterization of infield duty cycles and exhaust emissions from diesel powered off-road heavy-duty equipment
… data was logged during in-field operation, and test cycles were created on a dynamometer test bed using this data. For the tractor, on-board emissions measurement equipment collected mass emissions rate data in field.;Vast differences were found between transient and 8-mode brake-specific test …
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Characterization of infield vehicle activity data and exhaust emissions from diesel powered off-road vehicles
… document infield operation for the creation of test cycles and strategies. These cycles were later used to mimic infield operation for the collection of emissions and performance data on a dynamometer test bed.;Brake-specific emissions data collected during the transient cycles was compared to …
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Electric-drive vehicle emulation using advanced test bench
… the success of EDV implementation is developing test platforms that closely emulate the behavior of these vehicles.</p><p>In this dissertation, a new approach for emulating an EDV system on a motor/dynamometer test bench is investigated. Two different methods of emulation are discussed which are …
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Systems engineering approach to engine test stand development for micropatching evaluations
… engineering methodology to develop an engine test stand used to extract, patch and validate the binary file of a diesel engine electronic control module. Electronic control modules operate modern systems ranging from aircraft and spacecraft to automobiles, heavy trucks and industrial …
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Development of a test method to measure "in-use" emissions from stationary and portable diesel sources
… accurate and easy-to-use in-field test method was developed that would allow regulatory bodies, such as the California Air Resources Board (CARB) to determine in-use compliance with emission standards for newly manufactured portable and stationary engines. As emissions measured …
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Characteristics of particles downstream of a partially failed diesel particulate filter.
… a DPF failure was first simulated on an engine dynamometer test stand using an exhaust bypass valve. Then the valve was removed and the filter was actually failed in a series of steps by drilling out individual channel end caps. Exhaust was cooled and diluted using a partial flow air ejector …
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Estimation of internal consistency and stability reliability using isokinetic segmental curve analysis
… a standardized isokinetic knee extension/flexion test on the Cybex II isokinetic dynamometer. Test protocol consisted of 5 maximum repetitions at a speed of 60 deg/sec. Within one week of the initial test, each subject performed a retest. During testing, all torque and angle measurement …
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Modeling Diesel Bus Fuel Consumption and Dynamically Optimizing Bus Scheduling Efficiency
… that are available either require significant dynamometer data gathering to calibrate the model parameters and also produce a bang-bang control system (optimum control entails maximum throttle and braking input). This thesis extends the Virginia Tech Comprehensive Power-Based Fuel Consumption …
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Simplified electric vehicle powertrain modelling
… simulators are validated for ten BEVs using dynamometer test data from Argonne National Laboratory. Energy consumption estimation deficiencies of the SEVP are addressed by; (i) a simple cabin thermal load model, and (ii) including machine saturation and flux weakening in the SPM model. For …
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Feed-Forward Air-Fuel Ratio Control during Transient Operation of an Alternative Fueled Engine
… model-based calibration techniques and engine dynamometer data, an intake manifold model was created. Coupling this model with a Forward Euler approximation, a predictive intake manifold pressure algorithm was developed. Adaptive models were implemented into the control algorithm to account for …
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Investigation of Emissions and Fuel Economy for the Integrated Bus Information System
… data used in this study were based on chassis dynamometer testing conducted by West Virginia University (WVU), considering that chassis dynamometer test cycles could reflect the actual vehicle operations.;Many factors affect emissions and fuel economy, including vehicle parameters, fuel type, …