01519225

Component

https://doi.org/10.3141/2428-01

http://scholar.google.com...akha&publication_year=2014

Few models estimate fuel consumption and carbon dioxide emission levels of diesel and hybrid buses. Models that are available either require the gathering of significant dynamometer data to calibrate the model parameters or produce a bang-bang control system, which results when optimal control entails use of maximum throttle and breaking use. This paper extends the Virginia Tech Comprehensive Power-Based Fuel Consumption Model (VT-CPFM) to model diesel and hybrid buses. The bus parameters are calibrated with publicly available data from the Altoona Bus Research and Testing Center in Altoona, Pennsylvania. The research presented in this paper analyzed 10 standard diesel buses and three hybrid buses. The VT-CPFM estimated fuel consumption levels on the Orange County bus cycle dynamometer test with an average error of 4.7%. The estimation error was less than 6% for all except two buses, with a maximum error of 10.66% for one hybrid bus. The VT-CPFM was also validated with on-road fuel consumption measurements that were derived by creating drive cycles from acceleration information; these measurements produced an average estimation error of 22%. These higher errors are probably attributable to the in-field drive cycles, which had to be constructed because none were available.

01537868

14-3863

English

pp 1–9

2014

Transportation Research Record: Journal of the Transportation Research Board

9780309295161

Print

Figures (6) ; References (16) ; Tables (5)

Calibration; Carbon dioxide; Diesel buses; Dynamometers; Fuel consumption; Hybrid vehicles; Pollutants

Energy; Environment; Public Transportation; Vehicles and Equipment; I15: Environment; I96: Vehicle Operating Costs

TRIS, TRB, ATRI

Jan 27 2014 3:20PM

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