THE FORD PROCO (PROGRAMMED COMBUSTION) ENGINE UPDATE

In order to maximize the fuel economy at constrained emission levels, mapping tests were conducted on an experimental Ford 6.6 L PROCO (programmed combustion) engine. In the gasoline-fueled PROCO stratified-charge engine, direct cylinder fuel injection permits operation at overall lean mixture ratios and higher compression ratio, resulting in brake specific fuel consumption values similar to those of prechamber diesel engines. In the current study, the air/fuel ratio, exhaust gas recirculation rate, injection, and spark timings were independently varied at eight operating points selected to cover the operating range of urban and highway driving. The data obtained from these tests were used to project vehicle results and to define a calibration schedule. The control system was adjusted to this schedule and several engines were installed and tested in vehicles. The results show that the PROCO engine, calibrated to meet the preliminary 4000-mi engineering objectives for the .41/3.4/1.0 gm/mi HC (hydrocarbon)/CO (carbon monoxide)/NOx (nitrogen oxides) emission standard, exhibits about 20% better fuel economy compared with a 6.6L carbureted engine calibrated for the 1977 emission standard of 1.5/15/2.0 gm/mi HC/CO/NOx. Acceleration, power, octane requirement, and startability test results are similar to those of a carbureted engine.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • Presented at SAE West Coast Meeting, San Diego, 7-10 August 1978.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Scussel, A J
  • Simko, A O
  • Wade, W R
• Publication Date: 1978

Media Info

• Features: References;
• Pagination: 42 p.
• Serial:
  • SAE Technical Paper
  • Publisher: Society of Automotive Engineers (SAE)
  • ISSN: 0148-7191
  • EISSN: 2688-3627
  • Serial URL: http://papers.sae.org/

Subject/Index Terms

• TRT Terms: Exhaust gases; Fuel consumption; Stratified charge engines; Vehicle tests
• Identifier Terms: Ford Motor Company
• Uncontrolled Terms: Experimental design
• Subject Areas: Energy; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00396991
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: SAE 780699, HS-025 559U
• Files: HSL, USDOT
• Created Date: Aug 31 1985 12:00AM