THE ROLE OF OXYGEN IN INTAKE AND EXHAUST ON NO (NITRIC OXIDE) EMISSION, SMOKE AND BMEP (BRAKE MEAN EFFECTIVE PRESSURE) OF A DIESEL ENGINE WITH EGR (EXHAUST GAS RECIRCULATION) SYSTEM

Relationships among exhaust gas recirculation (EGR), nitric oxide (NO) and smoke emissions, and brake mean effective pressure (BMEP) are examined for diesel engines, and the effect of decreased oxygen with EGR in direct injection, prechamber, and turbocharged diesel engines is considered. Results indicate that NO reduction depends on decreasing the incoming oxygen rate. Increased smoke and decreased BMEP are due to a reduced exhaust oxygen rate. No reduction is also the result of increased ambient humidity which can be explained by decreased oxygen in the incoming charge. With these results, it is possible to predict the ratio of reduction of NO emission, the increase in smoke, and the decrease in BMEP without considering EGR.

• Supplemental Notes:
  • Also published in HS-029 113 (SAE-P-86), "Diesel Combustion and Emissions," Warrendale, Pennsylvania, 1980 pp 65-73. Presented at SAE Congress and Exposition, Detroit, 25-29 February 1980.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Tsunemoto, H
  • ISHITANI, H
• Publication Date: 1980

Media Info

• Features: References;
• Pagination: 9 p.

Subject/Index Terms

• TRT Terms: Brakes; Braking performance; Diesel engines; Exhaust gas recirculation; Exhaust gases; Nitric oxide; Oxygen; Smoke
• Old TRIS Terms: Brake mean effective pressure
• Subject Areas: Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00385648
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: SAE 800030, HS-029 119
• Files: HSL, USDOT
• Created Date: Jun 28 1984 12:00AM