MODIFYING DIESEL ENGINE OPERATING PARAMETERS TO REDUCE EMISSIONS

THE EFFECT OF ENGINE PARAMETERS ON EXHAUST EMISSIONS FROM TWO DIESEL ENGINES WAS STUDIED EXPERIMENTALLY. FUEL- INJECTION CHARACTERISTICS AND INTAKE AIR CONDITIONS WERE CONSIDERED AS PARAMETERS INFLUENCING THE EMISSIONS. EMPHASIS WAS PLACED ON THE EFFECT OF PARAMETER VARIATIONS ON NITROGEN OXIDE (NO (X)) EMISSIONS, BECAUSE DIESELS GENERALLY OMIT VERY LOW LEVELS OF CARBON MONOXIDE (CO) AND UNBURNED HYDROCARBONS. EMISSIONS OTHER THAN NO (X) WERE AT LOWEST LEVELS WHEN THE ENGINES WERE ADJUSTED FOR BEST PERFORMANCE. NO(X) EMISSIONS CAN BE DIMINISHED SOMEWHAT THROUGH VARIATION IN FUEL-INJECTION CHARACTERISTICS, BUT THERE GENERALLY ARE PENALTIES IN EMISSIONS OF CO, SMOKE, AND UNBURNED HYDROCARBONS OR IN ENGINE PERFORMANCE. INTAKE AIR CONDITIONS--TEMPERATURE AND COMPOSITION--HAVE A SIGNIFICANT EFFECT ON NO(X) EMISSIONS. LEVELS OF NO(X) ARE REDUCED BY EXHAUST GAS RECIRCULATION OR ADDING WATER TO THE INTAKE AIR STREAM. HOWEVER, THE RATE OF WATER ADDED OR EXHAUST GAS RECIRCULATED MUST BE LIMITED TO PREVENT DEGRADATION OF ENGINE PERFORMANCE AND INCREASED EMISSIONS OF CO AND SMOKE. /AUTHOR/

• Supplemental Notes:
  • Rept No BM-RI-7579
• Corporate Authors:

  Bartlesville Energy Technology Center

  Department of Energy
  Bartlesville, OK  United States  74003
• Authors:
  • MARSHALL, W F
  • HURN, R W
• Publication Date: 1971

Media Info

• Pagination: 19 p.

Subject/Index Terms

• TRT Terms: Carbon monoxide; Exhaust gases; Fuel injection; Hydrocarbons; Intake valves; Nitric oxide; Pollutants; Smoke
• Old TRIS Terms: Intake systems
• Subject Areas: Highways; Planning and Forecasting; Safety and Human Factors;

Filing Info

• Accession Number: 00223975
• Record Type: Publication
• Source Agency: National Technical Information Service
• Files: TRIS
• Created Date: Jun 19 1973 12:00AM