Download or read book Factors Affecting the Repeatability of the Fuel Consumption of a Heavy duty Truck on Urban and Highway Roads written by Mohamed Wahba and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Trends in vehicle control show an increasing reliance on data aggregation and model-based predictive control to improve vehicle performance. The data and models that underly this trend, when analyzed experimentally on-the-road, allow discovery of route and location-specific effects that are not typically captured with generic vehicle or road representations. The influence of these effects on the performance, fuel economy, and stability of vehicle systems - particularly heavy vehicles used individually or in platoons - is poorly understood.This thesis examines the location-specific variations and influences that affect the performance in terms of fuel economy of heavy-duty trucks in urban and highway routes. The methods are motivated by experimental data collection from large numbers of repeated route traversals, with data including vehicle position, speed, acceleration, fuel use as well as drag reduction for following trucks in the case of platooning. These measurements allow the dynamic fuel consumption to be matched as a function of distance along the route as measured in a spatial s-coordinate. Testing situations include conventional single-vehicle operation across a wide range of urban, arterial, and highway situations, as well as the platooning of two trucks on an interstate highway.The results demonstrate that terrain and position information within a route offer significant predictions in terms of fuel economy in a vehicle. Additionally, infrastructure elements, specifically vehicle-to-infrastructure (V2I) communication can be used not only to monitor route information, but also used by the infrastructure to constrain or define behaviors of the vehicle. Moreover, the geometric definition of a road was seen to change the behavior of the stability of a truck platoon. Also, the drag reduction experienced by truck platoon is quantified using wind-tunnel experiments. Afterwards, a framework is proposed where the number of route traversals needed to define a route in terms of fuel use and vehicle speed is obtained based on statistical confidence. Finally, two commercial Volvo trucks are used to obtain location-specific fuel consumption and drag estimates when undergoing a fixed gap-distance in a truck platoon on Interstate-99. When the inter-vehicle platoon spacing was fixed to a one vehicle length, the fuel consumption reduction had a per-route average improvement of 13.6% on one route, and 9.1% on another route.
Download or read book Technologies and Approaches to Reducing the Fuel Consumption of Medium and Heavy Duty Vehicles written by National Research Council and published by National Academies Press. This book was released on 2010-07-30 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technologies and Approaches to Reducing the Fuel Consumption of Medium- and Heavy-Duty Vehicles evaluates various technologies and methods that could improve the fuel economy of medium- and heavy-duty vehicles, such as tractor-trailers, transit buses, and work trucks. The book also recommends approaches that federal agencies could use to regulate these vehicles' fuel consumption. Currently there are no fuel consumption standards for such vehicles, which account for about 26 percent of the transportation fuel used in the U.S. The miles-per-gallon measure used to regulate the fuel economy of passenger cars. is not appropriate for medium- and heavy-duty vehicles, which are designed above all to carry loads efficiently. Instead, any regulation of medium- and heavy-duty vehicles should use a metric that reflects the efficiency with which a vehicle moves goods or passengers, such as gallons per ton-mile, a unit that reflects the amount of fuel a vehicle would use to carry a ton of goods one mile. This is called load-specific fuel consumption (LSFC). The book estimates the improvements that various technologies could achieve over the next decade in seven vehicle types. For example, using advanced diesel engines in tractor-trailers could lower their fuel consumption by up to 20 percent by 2020, and improved aerodynamics could yield an 11 percent reduction. Hybrid powertrains could lower the fuel consumption of vehicles that stop frequently, such as garbage trucks and transit buses, by as much 35 percent in the same time frame.
Download or read book The Effect of Speed on Truck Fuel Consumption Rates written by Edwin M. Cope and published by . This book was released on 1974 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of the Society of Automotive Engineers written by Society of Automotive Engineers and published by . This book was released on 1924 with total page 1308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the Society of Automotive Engineers written by and published by . This book was released on 1923 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. 30-54 (1932-46) issued in 2 separately paged sections: General editorial section and a Transactions section. Beginning in 1947, the Transactions section is continued as SAE quarterly transactions.
Download or read book Highway Safety Literature written by and published by . This book was released on 1980 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Factors Affecting Automotive Fuel Economy written by United States. Environmental Protection Agency. Office of Air and Waste Management and published by . This book was released on 1976 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Consumption of Heavy Road Vehicles written by and published by . This book was released on 1989 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: The relevant factors affecting heavy vehicle fuel consumption have been grouped into a system called SICMER - system of interrelations among driver, machine, environment and the road. Some of these interrelated factors include: energy transformation in the engine, energy transmission to the wheels, energy balance between tires and road, complex movement of articulated vehicles, and the influence of the driver's technique. Some comparisons of fuel consumption are presented in the following cases: differences in driving technique, different combinations of the semi-trailer undercarriage, and different road surfaces and profiles. Prototypes of driver assistance instruments have been designed based on some of the relationships studies.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of the Society of Automotive Engineers written by and published by . This book was released on 1923 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Road User and Mitigation Costs in Highway Pavement Projects written by David Leonard Lewis and published by Transportation Research Board. This book was released on 1999 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis report will be of interest to transportation agency planners; design, construction, and maintenance engineers; and administrators, managers, economists, and other decisionmakers involved in programming highway pavement projects. This synthesis describes current practice with regard to road user and mitigation costs in highway pavement projects. Information for the synthesis was collected by surveying U.S. and Canadian transportation agencies and by conducting a literature search of both domestic and foreign publications. This report of the Transportation Research Board provides detailed information on the various methods employed by transportation agencies to estimate user costs. The advantages and disadvantages of each are reported. Information on the various components of user costs (that is, time related, vehicle operating, safety, and environmental costs) is also included. In addition, the study reports on the various mitigation strategies available to agencies to reduce user costs. Information is also provided on how user costs and mitigation strategies have been applied to evaluate different alternatives; and how uncertainties, political considerations, and quality control contribute to the decisionmaking process.
Download or read book National Fuel Economy Testing Act of 1974 written by United States. Congress. Senate. Committee on Commerce. Special Subcommittee on Science, Technology, and Commerce and published by . This book was released on 1974 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Public Roads written by and published by . This book was released on 1970 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of Fuel Economy Technologies for Light Duty Vehicles written by National Research Council and published by National Academies Press. This book was released on 2011-06-03 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various combinations of commercially available technologies could greatly reduce fuel consumption in passenger cars, sport-utility vehicles, minivans, and other light-duty vehicles without compromising vehicle performance or safety. Assessment of Technologies for Improving Light Duty Vehicle Fuel Economy estimates the potential fuel savings and costs to consumers of available technology combinations for three types of engines: spark-ignition gasoline, compression-ignition diesel, and hybrid. According to its estimates, adopting the full combination of improved technologies in medium and large cars and pickup trucks with spark-ignition engines could reduce fuel consumption by 29 percent at an additional cost of $2,200 to the consumer. Replacing spark-ignition engines with diesel engines and components would yield fuel savings of about 37 percent at an added cost of approximately $5,900 per vehicle, and replacing spark-ignition engines with hybrid engines and components would reduce fuel consumption by 43 percent at an increase of $6,000 per vehicle. The book focuses on fuel consumption-the amount of fuel consumed in a given driving distance-because energy savings are directly related to the amount of fuel used. In contrast, fuel economy measures how far a vehicle will travel with a gallon of fuel. Because fuel consumption data indicate money saved on fuel purchases and reductions in carbon dioxide emissions, the book finds that vehicle stickers should provide consumers with fuel consumption data in addition to fuel economy information.
Download or read book Highway Safety Literature written by and published by . This book was released on 1984 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluating the Impact of Road Grade on Simulated Commercial Vehicle Fuel Economy Using Real World Drive Cycles written by and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 to pull heavy payloads up inclines as road grade increases. Non-hybrid vehicles are then unable to recapture energy on descent and lose energy through friction braking. While the on-road effects of road grade are well understood, the majority of standard commercial vehicle drive cycles feature no climb or descent requirements. Additionally, existing literature offers a limited number of sources that attempt to estimate the on-road energy implications of road grade in the medium- and heavy-duty space. This study uses real-world commercial vehicle drive cycles from the National Renewable Energy Laboratory's Fleet DNA database to simulate the effects of road grade on fuel economy across a range of vocations, operating conditions, and locations. Drive-cycles are matched with vocation-specific vehicle models and simulated with and without grade. Fuel use due to grade is presented, and variation in fuel consumption due to drive cycle and vehicle characteristics is explored through graphical and statistical comparison. The results of this study suggest that road grade accounts for 1%-9% of fuel use in commercial vehicles on average and up to 40% on select routes.
Download or read book Handbook of Road Technology written by M. G. Lay and published by CRC Press. This book was released on 2009-06-11 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fully revised fourth edition of Max Lay's well-established reference work covers all aspects of the technology of roads and road transport, and urban and rural road technology. It forms a comprehensive but accessible reference for all professionals and students interested in roads, road transport and the wide range of disciplines involved with
