Results 1 - 10 of 8454
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[en] This report summarizes key findings in two national plug-in electric vehicle charging infrastructure demonstrations: The EV Project and ChargePoint America. It will be published to the INL/AVTA website for the general public.
[en] This manual details the U.S. Advanced Battery Consortium and U.S. Department of Energy Vehicle Technologies Program goals, test methods, and analysis techniques for a 48 Volt Mild Hybrid Electric Vehicle system. The test methods are outlined stating with characterization tests, followed by life tests. The final section details standardized analysis techniques for 48 V systems that allow for the comparison of different programs that use this manual. An example test plan is included, along with guidance to filling in gap table numbers.
[en] Since standard vehicles are powered by internal combustion mechanisms that rely on fossil fuels, electric vehicles that are propelled by one or more electric engines have been proposed as an alternative to promote sustainable personal transportation. In this paper we propose a general demand model for vehicle purchases at the individual level assuming that the necessary microdata is available. We then list the ideal microdata that would be needed for estimating this general demand model. For elaborating this list, we take into account the particularities of low emission vehicles, with emphasis in their cost-reliability-environmental benefits tradeoff, as well as the potentiality for evaluation of welfare improving policies related to adoption of energy-efficient technologies. We discuss data sources and collection strategies for the different attributes of the model, especially for those characteristics that are nonstandard such as symbolic values. For instance, we discuss the role of range anxiety as a barrier of adoption of electric vehicles, and the implied relevance of including driving range to get consumers’ willingness to pay for better performing electric batteries. - Highlights: ► Evaluation of electric vehicles as an alternative to promote sustainable transportation. ► We propose a generalized discrete choice model for vehicle purchases. ► The model includes endogenous latent attributes such as environmental preferences. ► We describe the data needs for estimating the generalized demand model. ► We propose effect and causal indicator for the latent attributes.
[en] In this paper, we propose a general fuzzy inference approach to building a model of hazardous road transport that relates given traffic, weather, and vehicle-speed conditions to the accident rate. The development of the model is discussed in detail, and its validation is provided with reference to literature data regarding the transport of spent nuclear fuel to its final confinement repository
[en] This paper outlines the power requirements of electric propulsion technology being developed today, including arcjets, magnetoplasmadynamic (MPD) thrusters, and ion engines. Power supply characteristics are discussed for nuclear, solar, and power-beaming systems. Operational characteristics are given for each, as well as the impacts of the power supply alternative on the overall craft performance. The power-beaming approach, because of its modular nature, is able to meet the power requirements of all three electric propulsion types. Also, commonality of approach allows different electric propulsion approaches to be powered by a single power supply approach. Power beaming exhibits better flexibility and performance than on-board nuclear or solar power systems
[en] This long-distance solar car race provides a unique opportunity to increase America's awareness of a variety of important issues: renewable energy sources and technologies, environmentally clean energy options, improvements in transportation and opportunities in new, fast-growing energy-related businesses
[en] This report provides a statistical description of the types and severities of tractor semi-trailer accidents involving at least one fatality. The data were developed for use in risk assessments of hazardous materials transportation. Several accident databases were reviewed to determine their suitability to the task. The TIFA (Trucks Involved in Fatal Accidents) database created at the University of Michigan Transportation Research Institute was extensively utilized. Supplementary data on collision and fire severity, which was not available in the TIFA database, were obtained by reviewing police reports for selected TIFA accidents. The results are described in terms of frequencies of different accident types and cumulative distribution functions for the peak contact velocity, rollover skid distance, fire temperature, fire size, fire separation, and fire duration
[en] A survey of road transport of goods has demonstrated the paucity of data on accident conditions. Two types of maximum accident have been identified and analysed by calculations and by eight tests with packages weighing 1300 kg. In the first type of accident, the carrier vehicle is subjected to a head-on impact at a speed of 50 km/h, where the primary concern is to keep the package from moving (average deceleration 35g); in the second type, the package is subjected to impact from the side by another vehicle, where the primary concern is to limit the damage to the package to what would be experienced when falling from 1 m onto a punch. There are three mathematical formulations which express what these requirements mean as far as the tie-down systems for the packages are concerned: a balance of the forces in the system of slings and blocks during head-on impact (keeping the package from moving); an energy balance in the striking object-object struck-sling system during impact from the side (freeing of the package); a rigidity criterion in the sling-package system to limit damage to the package during impact from the side. Application of these criteria shows that wedging is essential to prevent packages, particularly big ones (more that 1 t), from moving during head-on impact. (author)