Abstract
The Untied States Department of Energy is engaged in the research, development and deployment of PHEV technology through the “Advanced Vehicle Testing Activity.” In this program, data has been collected from a Prius PHEV converted by HymotionTM using industry standard dynamometer testing procedures and from in-use operation of fleets. Differences in fuel-only consumption rates observed in the on-road data compared to the dynamometer results were fairly dramatic. Correlations of the driving style and conditions of dynamometer testing and on-road conditions were made possible by comprehensive onroad loggers. A model was developed to infer driving intensity from the on-road dataset from data load measurement during dynamometer testing. The reasons for the shortfall are detailed in the paper. They range from driver aggressiveness, accessory loads, ambient temperature (weather), and the high sensitivity the control system exhibits with increased acceleration pedal demand and higher average cruising speeds.
Highlights
Recent advances in battery technology for vehicle electrification have potential to displace significant amounts of petroleum by using electrical grid energy
The Urban Dynamometer Driving Schedule (UDDS), Highway Fuel Economy Driving Schedule (HWFEDS or HWY), and the US06 cycle are tested under standard lab ambient temperature with no additional solar simulation
The most common question a person may ask about a new fuel saving technology is “What is the fuel economy?” To answer this question, fleet fuel economy was processed and a single aggregate MPG was calculated
Summary
Recent advances in battery technology for vehicle electrification have potential to displace significant amounts of petroleum by using electrical grid energy. The claims of “+100MPG” come largely from results from standard dynamometer test results but are not necessarily taken in the context of what the average driver may experience. Comparisons of standard test results with on-road experience will address many questions about the performance of converted HEVs to PHEV operation. The U.S Department of Energy’s Advanced Vehicle Testing Activity (AVTA) performs independent testing to assess the energy efficiency of advanced technology vehicles, including as PHEVs. AVTA is conducting a comprehensive PHEV testing and evaluation program, with testing in laboratory, track, and on-road environments. Argonne National Laboratory performs AVTA’s light-duty dynamometer testing. The Idaho National Laboratory conducts on-road testing and fleet demonstrations for AVTA. The purpose of this paper is to correlate results from AVTA’s dynamometer testing to in-use fleet vehicle performance
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
