FUEL HOSE PERMEATION; AN EMISSIONS PROBLEM?

Stringent restrictions on hydrocarbon emissions require close control on sources of trace hydrcarbon emissions such as automotive fuel systems. By the 1981 model year, the allowable hydrocarbon emission per unit per test may be as low as 2.0 g. Emissions via permeation through elastomeric fuel hose materials and seals may become significant. New fuel hose material with improved resistance to degradation, volume increase, and permeation in aliphatic/aromatic fuels will be required as regulations on allowable hydrocarbon emissions change and fuel compositions are altered. Current fuel hose constructions include nitrile (NBR) and epichlorohydrin (ECO) elastomers as tube materials with either chlorosulfonated polyethylene (Hypalon) or polychloroprene for hose covers. Fluorohydrocarbon elastomers have been constructed for fuel injection systems because of their excellent resistance to swelling and degradation in a wide variety of fuels and solvents.

Media Info

  • Pagination: p. 86-88
  • Serial:
    • Automotive Engineering
    • Volume: 87
    • Issue Number: 6
    • Publisher: Society of Automotive Engineers (SAE)
    • ISSN: 0098-2571

Subject/Index Terms

Filing Info

  • Accession Number: 00301650
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Nov 27 1979 12:00AM