LEAN MIXTURE ENGINES TESTING AND EVALUATION PROGRAM. VOLUME II: COMPREHENSIVE DISCUSSION

This report is aimed at defining analytically and demonstrating experimentally the potential of the 'lean-burn concept.' Fuel consumption and emissions data are obtained on the engine dynamometer for the baseline engine, and two lean-burn configurations of the same engine and data comparisons are made. Individual cylinder equivalence ratios are measured to evaluate the cylinder-to-cylinder distribution. Pressure-time traces from individual cylinders are used to get information about ignition delay, combustion duration and cycle-to-cycle pressure variations. Fuel consumption and emissions data for one lean-burn configuration are obtained over the Federal Driving Cycle using a chassis dynamometer and the results are compared with the stock baseline results. Using experimental results and information from the existing literature, the potential of the 'lean-burn concept' is assessed using the Blumberg-Kummer cycle analysis program. The main body of the report, provides a comprehensive discussion of each engine improvement, and supporting data, the potential of the lean burn approach, and conclusions and recommendations.

• Supplemental Notes:
  • See also PB-251 767.
• Corporate Authors:

  Jet Propulsion Laboratory

  California Institute of Technology, 4800 Oak Grove Drive
  Pasadena, CA  United States  91103

  Transportation Systems Center

  55 Broadway, Kendall Square
  Cambridge, MA  United States  02142
• Authors:
  • Dowdy, M W
  • Hoehn, F W
  • Vanderbrug, T G
• Publication Date: 1975-11

Media Info

• Pagination: 120 p.

Subject/Index Terms

• TRT Terms: Carbon dioxide; Carbon monoxide; Chassis; Combustion; Combustion chambers; Data collection; Design; Dynamometers; Engines; Evaluation; Exhaust gases; Fuel consumption; Fuels; Gas analysis; Gases; Ignition; Lean fuel mixtures; Nitric oxide; Nitrogen oxides; Physical distribution; Reviews; Shape; Test procedures; Testing; Thermal efficiency; Traffic equivalence factor; Vehicle power plants
• Uncontrolled Terms: Configuration; Cylinders; Design criteria
• Old TRIS Terms: Automobile engines; Combustion chamber gases; Lean fuel engine
• Subject Areas: Design; Energy; Freight Transportation; Geotechnology; Highways; Materials; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00133308
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: JPL-5040-12-Vol-2 Final Rpt., DOT-TSC-OST-76-26.II
• Contract Numbers: RA-74-38-TMP-0223
• Files: NTIS, TRIS
• Created Date: Jun 23 1976 12:00AM