ROTARY ENGINE'S LIGHT-LOAD COMBUSTION IMPROVED

Rotary engines, by their inherent design, recirculate large amounts of exhaust gas relative to their piston-operated cousins. This exhaust gas recirculation (EGR) sometimes results in excessive misfiring under idling conditions, producing poor driveability and lower fuel economy. Toyota engineers have isolated sources of misfire according to their location in either of two plug holes or the combustion chamber itself. Injection of additional air with use of a glow plug have made possible misfire-free operation at idle, enhancing the rotary's future prospects. Toyota has developed a two-way induction rotary engine (Stratified Charge Rotary Engine: SCRE), which has virtually attained the necessary fuel economy goals Its tendency toward unstable combustion under light load, however, became more pronounced. Principal cause of this poor combusion was thought to be the excessive internally recirculated exhaust gas peculiar to this engine. Thus, correlations between ignition and combustion chamber gas composition are of interest, together with the processes of internal EGR.

Media Info

  • Pagination: p. 33-38
  • Serial:
    • Automotive Engineering
    • Volume: 87
    • Issue Number: 8
    • Publisher: Society of Automotive Engineers
    • ISSN: 0098-2571

Subject/Index Terms

Filing Info

  • Accession Number: 00310589
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Apr 22 1980 12:00AM