TOTAL GAS/EFFECTIVE FUEL RATIO PREDICTS COAST SURGE IN EMISSION-CONTROL VEHICLES

In the course of developing a low-emission manual transmission vehicle, coast surge in the fore-and-aft direction resulting from the installation of certain emission-control devices was sometimes experienced immediately after the initiation of vehicle deceleration. The investigation revealed that this vehicle surge was caused by combustion irregularities in a sequence of combustion-misfire-intense combustion events occurring every several cycles. A new combustibility standard, defined as the ratio of total cylinder mixture weight to effective fuel weight was found to predict combustibility and irregular combustion over the entire mixture range. As a results, driveability during deceleration was improved by modifying key emission-control components.

  • Supplemental Notes:
    • From SAE Meeting held June 9-13, 1980.
  • Corporate Authors:

    Society of Automotive Engineers

    400 Commonwealth Drive
    Warrendale, PA  USA  15096
  • Authors:
    • Nagumo, S
    • NAKAJIMA, Y
    • Hase, Y
  • Publication Date: 1980-6

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00331774
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: SAE 800827
  • Files: TRIS
  • Created Date: Jul 9 1981 12:00AM