Toyota researchers have developed an exhaust emission control system which varies the amount of secondary air injected into an engine's exhaust manifold and tailors exhaust gas composition for optimal performance of a three-way catalytic converter. In contrast to systems which control air/fuel (A/F) ratio ahead of the engine via variable carburetors or fuel injection, the Toyota system controls exhaust gas composition downstream of the engine, thus taking advantage of an unusually short control loop which can provide rapid oscillation of exhaust gas A/F ratio.

Media Info

  • Pagination: p. 87-92
  • Serial:
    • Automotive Engineering
    • Volume: 88
    • Issue Number: 4
    • Publisher: Society of Automotive Engineers (SAE)
    • ISSN: 0098-2571

Subject/Index Terms

Filing Info

  • Accession Number: 00325161
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: HS-028 905
  • Files: TRIS
  • Created Date: Aug 15 1981 12:00AM