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Technologies and Approaches to Reducing the Fuel Consumption of Medium- and Heavy-Duty Vehicles (Paperback)
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Technologies and Approaches to Reducing the Fuel Consumption of Medium- and Heavy-Duty Vehicles (Paperback)
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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.
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