Skip to main content

Use of Lightweight Materials in 21st Century Army Trucks (2003) / Chapter Skim
Currently Skimming:

Appendix B: Alternative Power Sources
Pages 89-94

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 89...
... This technology would be most beneficial in light and medium trucks with variable driving schedules, high speeds, and vehicle loading that varies widely between fully loaded and empty. The hybrid electric powertrain consists of an internal combustion engine coupled with electric motors and an energy storage system or battery.
Read the entire page →
From page 90...
... The second source of inefficiency is the transient operation of the internal combustion engine caused by the drive-wheel speed and the traction effort required. As a result of driving schedule, terrain configuration, vehicle load, driver technique, and other factors, the engine coupled with the driveline operates in a transient mode with a variable efficiency far below maximum.
Read the entire page →
From page 91...
... Several critical technologies require additional research to support innovative systems: electric motors and generators, electrical energy storage systems, power electronic products, electrical safety, regenerative braking, and purpose-built engines. Electric motors and generators are typical for series or parallel hybrid systems and their corresponding couplings and gear sets.
Read the entire page →
From page 92...
... Although these power sources have some merits due to the synergism between the turbine and the electrical generators, they represent a major departure from vehicular engines and cannot therefore leverage the advantages of high-volume production. Fuel Ceils Fuel cells are electrochemical devices that convert energy from the chemical reaction of hydrogen and oxygen into electricity.
Read the entire page →
From page 93...
... There are significant barriers to be overcome, however, before the technology can be used in consumer vehicles. These barriers include overall performance limits; cost; fuel availability, including onboard storage; and lack of infrastructures By 2005, fuel-cell vehicles using pressurized hydrogen may be produced for cars and sport utility vehicles (SUVs)
Read the entire page →

Key Terms

  • electric powertrain
  • electric powertrains
  • internal combustion
  • combustion engine
  • fuel cells

  • electric motors
  • electrical safety
  • energy storage
  • electronic products
  • alternative energy

  • power sources
  • fuel cell
  • electrical energy
  • engine coupled
  • auxiliary power

  • power units
  • power electronic
  • regenerative braking
  • delivery infrastructure
  • gear sets

  • effort required
  • utility vehicles
  • vehicle load
  • energy sources
  • automated production

  • braking energy
  • essential capability
  • pressurized hydrogen
  • kinetic energy
  • gas turbines


    • This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
    More information on Chapter Skim is available.