The lean operating limit of a rotary combustion engine was extended by hydrogen-enriched fuel to equivalence ratios as low as 0.49. Reductions in NO sub x and CO emissions from baseline conditions were observed, although HC emissions increased significantly. The effect of hydrogen-induced lean combustion on indicated thermal efficiency was found to be dependent on the change in H sub 2/C sub 8 H sub 18 fraction with decreasing equivalence ratio. An increase in H sub 2/C sub 8 H sub 18 fraction with decreasing equivalence ratio has little effect on indicated thermal efficiency, whereas a constant or decreasing H sub 2/C sub 8 H sub 18 fraction led to a makred decrease. The brake thermal efficiency when compared at constant power increased marginally.

  • Supplemental Notes:
    • Sponsored by the National Science Foundation and prepared for the West Coast Meeting of the Society of Automotive Engineers, August 9-12, 1976, San Francisco, California.
  • Corporate Authors:

    University of California, Berkeley

    Institute of Transportation Studies Library
    Berkeley, CA  United States  94720
  • Authors:
    • Cichanowicz, J E
    • SAWYER, R F
  • Publication Date: 1976

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 15 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00145090
  • Record Type: Publication
  • Source Agency: Highway Safety Research Institute
  • Report/Paper Numbers: SAE #760611
  • Contract Numbers: NSF-GI-44379
  • Files: TRIS
  • Created Date: Mar 30 1977 12:00AM