The General Motors microprocessor based Computer Controlled Catalytic Converter (C-4) system used on 1980 California vehicles and nationwide in 1981 is described. The basic system function is to maintain engine exhaust air-fuel ratio control so that oxidation and reduction characteristics of three-way catalytic converters can be effectively utilized. Control strategies and components used in the Closed Loop Carburetor Control function are reviewed.

  • Supplemental Notes:
    • Also available from the National Highway Traffic Safety Administration in HS-031 180 (SAE-SP-477), "Implementation of Engine Control Strategies with Electronics," Warrendale, Pennsylvania, 1980, pp 45-60. Presented at SAE Congress and Exposition, Detroit, February 1980.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Grimm, R A
    • Bremer, R J
    • Stonestreet, S P
  • Publication Date: 1980

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00322895
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: SAE 800053, HS-031 183
  • Files: HSL, TRIS
  • Created Date: Jan 19 1983 12:00AM