Vehicle automation is a promising petroleum reduction technology, and platooning systems for heavy-duty vehicles are likely to be first step towards acceptance of vehicle automation.These may employ existing technologies such as radar or laser range finders, global positioning system (GPS), dedicated vehicle-to-vehicle communications (V2V), braking engine torque authority enable follow safely in close proximity with the goal reducing fuel consumption, traffic congestion, possibly...

Global Positioning System (GPS) data acquisition devices have proven useful tools for gathering real-world driving and statistics.The collected by these provide valuable information in studying habits conditions.When used jointly with vehicle simulation software, the are invaluable analyzing fuel use performance, aiding design of more advanced efficient technologies.However, when employing GPS systems to capture drive-cycle information, a number errors often appear captured raw...

Smart technologies enabling connection among vehicles and between infrastructure as well vehicle automation to assist human operators are receiving significant attention a means for improving road transportation systems by reducing fuel consumption -and related emissions -while also providing additional benefits through overall traffic safety efficiency.For truck applications, which currently responsible nearly three-quarters of the total U.S. freight energy use greenhouse gas (GHG)...

Understanding the real-world power demand of modern automobiles is critical importance to engineers using modeling and simulation in design increasingly efficient powertrains.Increased use global positioning system (GPS) devices has made large-scale data collection vehicle speed (and associated demand) a reality.While availability GPS improved industry's understanding in-use demand, relatively little attention been paid incremental requirements imposed by road grade.This analysis quantifies...

Medium and heavy duty (MD HD respectively) vehicles are responsible for 26 percent of the total U.S. transportation petroleum consumption [1]. Hydrogen fuel cells have demonstrated value as part a portfolio strategies reducing use emissions from MD [2] [3], but their performance range capabilities, associated component sizing remain less clear when compared to other powertrains. This paper examines suitability converting representative sample diesel trucks into Fuel Cell Electric Trucks...

The U.S. Department of Energy's American Recovery and Reinvestment Act (ARRA) deployment demonstration projects are helping to commercialize technologies for all-electric vehicles (EVs). Under the ARRA program, data from Smith Electric Navistar medium duty EVs have been collected, compiled, analyzed in an effort quantify impacts these new technologies. Over a period three years, National Renewable Energy Laboratory (NREL) has compiled over 250 Newton total 100,000 days in-use operation....

This paper presents multiple methods for predicting heavy/mediumduty vehicle fuel consumption based on driving cycle information.A polynomial model, a black box artificial neural net network and multivariate adaptive regression splines (MARS) model were developed verified using data collected from chassis testing performed parcel delivery diesel truck operating over the Heavy Heavy-Duty Diesel Truck (HHDDT), City Suburban Vehicle Cycle (CSHVC), New York Composite (NYCC), hydraulic hybrid...

In an effort to characterize the dynamics typical of school bus operation, National Renewable Energy Laboratory (NREL) researchers set out gather in-use duty cycle data from fleets operating across country.Employing a combination Isaac Instruments GPS/CAN loggers in conjunction with existing onboard telemetric systems resulted capture information for more than 200 individual vehicles three geographically unique domestic locations.In total, over 1,500 operational route shifts Washington, New...

This study compared fuel economy and emissions between heavy-duty hybrid electric vehicles (HEVs) equivalent conventional diesel vehicles.In-use field data were collected from daily fleet operations carried out at a FedEx facility in California on six HEV 2010 Freightliner M2-106 straight box trucks.Field collection primarily focused route assessment vehicle consumption over six-month period.Chassis dynamometer testing was also one to determine differences emissions.Route the analyzed...

Commercial vehicle fuel economy is known to vary significantly with both positive and negative road grade.Medium-and heavy-duty vehicles operating at highway speeds require incrementally larger amounts of energy pull heavy payloads up inclines as grade increases.Non-hybrid are unable recapture on descent lose through friction braking.While the on-road effects well understood, majority standard commercial drive cycles feature no requirements.Additionally, existing literature offers a limited...

REL completed a temporal and geospatial analysis of telematics data to estimate the fraction platoonable miles traveled by class 8 tractor trailers currently in operation.This paper discusses value limitations very large but low time-resolution sets, fuel consumption reduction opportunities from scale adoption platooning technology for highway vehicles US based on data.The set consist about 57,000 unique traveling over 210 million combined during two-week period.75% total result operating...

This research project compares laboratory-measured fuel economy of a medium-duty diesel powered hydraulic hybrid vehicle drivetrain to both conventional and gasoline in typical commercial parcel delivery application.Vehicles this study included model year 2012 Freightliner P10HH compared P100 van similar specifications.Drive cycle analysis 484 days operation from multiple vehicles was used select three standard laboratory drive cycles as well create custom representative cycle.These four...

In collaboration with the U.S. Environmental Protection Agency and Department of Energy, National Renewable Energy Laboratory has conducted a national analysis road grade characteristics experienced by medium- heavy-duty trucks on controlled access highways. These have been developed using TomTom's commercially available street map database. Using TomTom database, statistics hill distances were generated for network statistical distributions then weighted data provided activity Here,...

The National Renewable Energy Laboratory's (NREL's) Fleet Test and Evaluations team recently conducted chassis dynamometer tests of a class 8 conventional regional delivery truck over the Heavy Heavy-

In this paper, researchers at the National Renewable Energy Laboratory present results of simulation studies to evaluate potential fuel savings as a result improvements vehicle rolling resistance, coefficient drag, and weight well hybridization for four powertrains medium-duty parcel delivery vehicles.The vehicles will be modeled simulated over 1,290 real-world driving trips determine based on each technology identify best use cases platform.The impacts new technologies saving presented,...

This research project compares the in-use and laboratoryderived fuel economy of a medium-duty hybrid electric drivetrain with "engine off at idle" capability to conventional in typical commercial package delivery application.Vehicles this study included eleven model year 2010 Freightliner P100H hybrids that were placed service United Parcel Service (UPS) facility Minneapolis, Minn., during first half 2010.These vehicles evaluated for 18 months against P100D diesels same couple after...

When developing and designing new technology for integrated vehicle systems deployment, standard cycles have long existed chassis dynamometer testing tuning of the powertrain.However, to this day with recent developments advancements in plug-in hybrid battery electric technology, no true "work day" exist which tune measure energy storage control thermal management systems.To address these issues support development a range-extended pickup delivery Class 6 commercial vehicle, researchers at...

Under a collaborative interagency agreement between the U.