TIME RESOLVED MEASUREMENTS OF THE EXHAUST FROM A JET IGNITION PRECHAMBER STRATIFIED CHARGE ENGINE

In the jet-ignition prechamber stratified-charge spark-ignition engine, the fuel-air mixture at the time of combustion is non-uniform. Instantaneous exhaust mass flow rates and emission concentrations from this engine were measured and used to determine the degree to which this charge stratification persists in the products of combustion immediately downstream of the exhaust valve throughout the exhaust process. In all the cases studied no appreciable variations, during the exhaust process, were detected either in the air-fuel ratio of the exhaust gases as a function of time or in the instantaneous concentrations of CO2,O2 and NOX. The experimentally obtained instantaneous HC and CO concentrations in the exhaust, however, displayed large fluctuations and were used to study the sources of these two pollutants in this engine.

  • Corporate Authors:

    Society of Automotive Engineers

    400 Commonwealth Drive
    Warrendale, PA  USA  15096
  • Authors:
    • Ekchian, A
    • Heywood, J B
    • Rife, J M
  • Publication Date: 1977-3

Media Info

  • Features: References;
  • Pagination: 19 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00158357
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: SAE 770043 Preprint
  • Files: TRIS
  • Created Date: Dec 27 1977 12:00AM