ROTARY ENGINE COMBUSTION WITH HYDROGEN ADDITION

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

• TRT Terms: Combustion; Hydrogen; Lean fuel mixtures; Rotary engines; Thermal efficiency; Traffic equivalence factor
• Old TRIS Terms: Lean fuel engine
• Subject Areas: Highways; Safety and Human Factors;

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