FedEx Express Gasoline Hybrid Electric Delivery Truck Evaluation: 12-Month Report

Abstract

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Application of a bidirectional DC-DC in an electric powertrain for medium duty delivery trucks

“…For example, average and maximum velocities, acceleration rates, and grades, as well as location, kinetic intensity, temperature, road conditions, and many more. Average driving speed can be used to quantify driving cycles [11] and does not include the time spent stationary since this time does not significantly contribute to the energy consumption.…”

“…Delivery trucks meet this profile [11]. Furthermore, the traditional system does not need to be altered significantly since the new system is created by the introduction of a DC-DC converter.…”

“…The primary goal is to examine this system in the context of an appropriate drive cycle for delivery trucks. One of the drive cycles that models the behavior of a delivery truck very well is the Orange County Cycle (OCC) [11,33] which is used for this phase of the project.…”

“…[11] demonstrates that some other cycles such as the New York City Cycle (NYCC) and HTUF-4 class 4 cycle (short version) are also applicable to delivery trucks. Two additional cycles, the common Urban Dynamometer Driving Schedule (UDDS [1]) and the Heavy Duty UDDS (UDDSHD [34]) are also used for comparison purposes.…”

GPS Data Filtration Method for Drive Cycle Analysis Applications

“…The light-duty data set was drawn from a collection of unknown light-duty vehicles [21] instrumented with GeoStats GeoLoggers as part of the year 2000 Southern California Association of Governments post-census regional travel survey, while the heavy-duty data set was drawn from class 3 to class 8 heavy-duty vehicle data collected from 2008 to present [7,22,23]. The GPS data for the heavy-duty data set was collected using a combination of GeoStats GeoLoggers and Isaac Instruments DRU908 and DRU900 data acquisition devices.…”