The Energy Efficiency Demonstration Scheme
The Energy Efficiency Demonstration Scheme

Author: Great Britain. Energy Efficiency Office

Publisher:

Published: 1990

Total Pages: 21

ISBN-13:

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An integrated approach has been applied to the aerodynamic styling of 17 tonne gross vehicle weight (GVW) rigid box bodied vehicles. Two prototype vehicles have been built and compared with two matched vehicles having no aerodynamic aids. Each of the two aerodynamically styled vehicles was monitored alongside a standard vehicle over a ten month period on a normal distribution service operated by Exel Logistics at two Argos depots. The aerodynamically styled vheicles did 23% more miles to the gallon than the standard trucks. For an annual mileage of 50,000 the fuel saving is 866 gallons of DERV/year per vehicle, worth £1180 at 1990 prices. Based on this saving the simple payback period is 1.6 years. Wind tunnel tests showed the standard Leyland DAF 17.18 Freighter with a box body had a drag coefficient of 0.716. The aerodynamic modifications reduced the drag coefficient by 55% to 0.325. Conversion of 5% of the national fleet to aerodynamically styled vehicles could achieve a national fuel saving of 5.7 million gallons of DERV/year for an annual mileage of 50,000, worth £7.8 million. Guidelines for the construction of aerodynamic trucks in the 6 to 24 tonne range are currently being prepared and will be published as a separate report, ED/287/335, available from ETSU. It is anticipated that the report will be available in August 1990.

Technologies and Approaches to Reducing the Fuel Consumption of Medium- and Heavy-Duty Vehicles
Technologies and Approaches to Reducing the Fuel Consumption of Medium- and Heavy-Duty Vehicles

Author: National Research Council

Publisher: National Academies Press

Published: 2010-07-30

Total Pages: 251

ISBN-13: 0309159474

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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.