Technologies and Approaches to Reducing the Fuel Consumption of Medium- and Heavy-Duty Vehicles (2010) / Chapter Skim
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1 Introduction
1 Introduction
Pages 9-16
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From page 9... ...
In response to that language, the NRC developed a state ment of task for the committee that directs it to: ORIGIN OF STUDY AND STATEMENT OF TASK • Consider approaches to measuring fuel economy for The National Research Council (NRC) Committee to medium- and heavy-duty vehicles that would be reA ssess Fuel Economy Technologies for Medium- and quired for setting standards; Heavy-Duty Vehicles was formed in response to a congressional mandate to the National Highway Traffic Safety Ad- 1The legislation uses both the terms "fuel economy" and "fuel efficiency." ministration (NHTSA)
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From page 10... ...
In addition, Chapter 7 explores the advantages the fuel efficiency of moving goods as opposed to set- and disadvantages of alternative approaches to reducing fuel ting vehicle fuel economy standards; and consumption, since many of these alternatives involve regu • Identify the potential costs and other impacts on the latory changes, and Chapter 8 discusses fuel consumption operation of medium-duty and heavy-duty trucks. (See regulatory approaches.
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From page 11... ...
The mission is not just to move wider, and taller trailers and higher maximum weight the truck and driver from one place to another but to deliver limits cargo. If total fuel consumed, total miles traveled, and total • Operational efficiency improvements by trucking comtons shipped are considered for the United States as a whole, panies to reduce the amount of distance traveled with a U.S.
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From page 12... ...
Light-duty vehicle manufacturers have already made air/fuel ratios. If effective lean air/fuel ratio aftertreatment significant improvements in reducing fuel consumption and systems could be developed, further reductions in gasoline even more progress in reducing vehicle emissions.
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From page 13... ...
fuel economy as a dramatic increase in annual miles driven A mix of gasoline and diesel engines is used in Classes by heavy vehicles. The continuation of these trends is docu 3 through 7, and diesel engines are almost exclusively mented in recent data through 2008 (NRC, 2008)
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From page 14... ...
In the U.S. EPA light-duty fuel economy This report uses FC or LSFC data throughout except tests, the vehicle is tested at its empty weight plus the equiva where fuel economy (FE)
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From page 15... ...
load-specific fuel consumption. The direct and indirect costs • Examined alternative approaches to improving fuel and benefits of integrating fuel economy technologies me efficiency.
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