REVIEW OF RETROFIT DEVICES DESIGNED TO IMPROVE FUEL ECONOMY OF SPARK IGNITION AUTOMOTIVE ENGINES

The results are presented of a review of available literature and programs related to retrofit devices. The results showed that some devices are capable of improving fuel economy under ideal tests conditions, but frequently, an increase in air polluting emissions occurred, rendering the device unsatisfactory or illegal. The study also showed that certain combinations of devices under specialized conditions resulted in improved fuel economy, acceptable emissions and considerably improved performance. It is noted that few retrofit devices merit consideration by municipal fleet operators. The review suggests that the most significant effort available is the vehicle driver's effort to improve fuel economy, and increased emphasis on driver education programs would be worthwhile. Simple inexpensive aids such as a vacuum gauge to show effects of acceleration, or maintaining tires a pound or two above recommended pressure together with appropriate education programs might provide an effective manner in which to improve overall fleet fuel economy. Comparative information on the performance of various concepts/devices are tabulated. These concepts/devices range from carburetors, lean bleed systems, and pressure regulators, to ignition systems, drive train, and turbochargers.

  • Corporate Authors:

    Joint Center for Transportation Studies

    202 C Street
    San Diego, CA  USA  92101
  • Authors:
    • Grahl, R B
  • Publication Date: 1978-5

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 19 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00185396
  • Record Type: Publication
  • Source Agency: Joint Center for Transportation Studies
  • Report/Paper Numbers: Monograph
  • Files: TRIS
  • Created Date: Feb 3 1979 12:00AM