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Wishart, Jeffrey
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On-Road and Dynamometer Evaluation of Vehicle Auxiliary Loads

SAE International Journal of Fuels and Lubricants

Argonne National Laboratory-Kevin Stutenberg
Idaho National Laboratory-Richard Barney Carlson
  • Journal Article
  • 2016-01-0901
Published 2016-04-05 by SAE International in United States
Laboratory and on-road vehicle evaluation is conducted on four vehicle models to evaluate and characterize the impacts to fuel economy of real-world auxiliary loads.The four vehicle models in this study include the Volkswagen Jetta TDI, Mazda 3 i-ELOOP, Chevrolet Cruze Diesel, and Honda Civic GX (CNG). Four vehicles of each model are included in this; sixteen vehicles in total. Evaluation was conducted using a chassis dynamometer over standard drive cycles as well as twelve months of on-road driving across a wide range of road and environmental conditions.The information gathered in the study serves as a baseline to quantify future improvements in auxiliary load reduction technology. The results from this study directly support automotive manufacturers in regards to potential “off-cycle” fuel economy credits as part of the Corporate Average Fuel Economy (CAFE) regulations, in which credit is provided for advanced technologies in which reduction of energy consumption from vehicle auxiliary loads can be demonstrated.The observed on-road auxiliary load varied from 135 W to over 1200 W across a wide range of ambient conditions and utilization patterns.…
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Effects of Electric Vehicle Fast Charging on Battery Life and Vehicle Performance

Idaho National Laboratory-Matthew Shirk
Intertek Testing Services NA, Inc-Jeffrey Wishart
Published 2015-04-14 by SAE International in United States
As part of the U.S. Department of Energy's Advanced Vehicle Testing Activity, four new 2012 Nissan Leaf battery electric vehicles were instrumented with data loggers and operated over a fixed on-road test cycle. Each vehicle was operated over the test route, and charged twice daily. Two vehicles were charged exclusively by AC level two electric vehicle supply equipment, while two were exclusively DC fast charged with a 50 kilowatt fast charger. The vehicles were performance tested on a closed test track when new, and after accumulation of 50,000 miles. The traction battery packs were removed and laboratory tested when the vehicles were new, and at 10,000-mile intervals throughout on-road mile accumulation. Battery tests performed include constant-current discharge capacity, electric vehicle pulse power characterization test, and low peak power tests.The data collected over 50,000 miles of driving, charging, and rest are analyzed, including the resulting thermal conditions and power and cycle demands placed upon the battery. Battery performance metrics including capacity, internal resistance, and power capability obtained from laboratory testing throughout the test program are analyzed.…
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The Electric Drive Advanced Battery (EDAB) Project: Development and Utilization of an On-Road Energy Storage System Testbed

ECOtality North America-Jeffrey Wishart, Tyler Gray
Idaho National Laboratory-Richard Barney Carlson
Published 2013-04-08 by SAE International in United States
As energy storage system (ESS) technology advances, vehicle testing in both laboratory and on-road settings is needed to characterize the performance of state-of-the-art technology and also identify areas for future improvement. The Idaho National Laboratory (INL), through its support of the U.S. Department of Energy's (DOE) Advanced Vehicle Testing Activity (AVTA), is collaborating with ECOtality North America and Oak Ridge National Laboratory (ORNL) to conduct on-road testing of advanced ESSs for the Electric Drive Advanced Battery (EDAB) project. The project objective is to test a variety of advanced ESSs that are close to commercialization in a controlled environment that simulates usage within the intended application with the variability of on-road driving to quantify the ESS capabilities, limitations, and performance fade over cycling of the ESS.To accommodate on-road testing of a wide range of ESS size, mass, and intended applications, the EDAB testbed was constructed on a mid-sized pickup truck chassis. This truck was converted into a Series Plug-In Hybrid Electric Vehicle (PHEV) which enables vehicle operation consistent with any electrified vehicle. Sophisticated software algorithms were…
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Quantifying the Effects of Idle-Stop Systems on Fuel Economy in Light-Duty Passenger Vehicles

ECOtality North America-Jeffrey Wishart, Tyler Gray, Nicholas Fengler
Idaho National Lab-Matthew Shirk
Published 2012-04-16 by SAE International in United States
Vehicles equipped with idle-stop (IS) systems are capable of engine shut-down when the vehicle is stopped, and rapid engine re-start for the vehicle launch. This capability reduces fuel consumption and emissions during periods where the engine is not being utilized to provide propulsion or to power accessories. IS sytems are a low-cost and fast-growing technology in the industry-wide pursuit of increased vehicle efficiency, possibly becoming standard features in European vehicles in the near future. In contrast, there are currently only three non-hybrid vehicle models for sale in North America with IS systems, and these are distinctly low-volume models.As part of the United States Department of Energy's Advanced Vehicle Testing Activity (AVTA), ECOtality North America has tested the real-world effect of IS systems on fuel consumption in three vehicle models imported from Europe. These vehicles were chosen to represent three types of systems: (1) spark ignition (SI) with 12 V Belt Alternator Starter (BAS); (2) compression ignition (CI) with 12 V BAS; and (3) direct-injection SI (DISI) with 12 V BAS/combustion restart The vehicles have undergone…
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