EXHAUST EMISSION LEVELS OF IN-SERVICE VEHICLES-COMPARISON OF 1970 AND 1971 SURVEYS

THE RESULTS OF A NATIONWIDE AUTOMOBILE EXHAUST EMISSION SURVEY CONDUCTED IN 1971 ARE PRESENTED AND COMPARED TO DATA OBTAINED FROM A 1970 SURVEY. AVERAGE HYDROCARBON AND CARBON MONOXIDE EMISSIONS ARE GIVEN FOR ENGINE SPEEDS OF IDLE AND 2500 RPM. VEHICLE DISTRIBUTION CURVES FOR HYDROCARBON AND CARBON MONOXIDE EMIXXIONS ARE SHOWN FOR THE 1971 DATA FOR SELECTED YEAR GROUPS BASED ON EMISSION CONTROL DEVICES. COMPARISON OF THE DISTRIBUTION CURVES OBTAINED FROM THE 1971 AND 1970 DATA SHOW THAT "DETERIORATION" (INCREASED EMISSIONS) OCCURED AT BOTH IDLE AND 2500 RPM IN THE ONE YEAR PERIOD. THE EFFECTS OF CARBURETOR ADJUSTMENTS ON IDLE EMISSIONS ARE COMPARED FOR THE 1971 AND 1970 DATA. /TRRL/

• Supplemental Notes:
  • SAE PAPER 720498
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Voelz, F L
  • Coleman, E C
  • Segal, J S
  • Gower, B G
• Publication Date: 1972-5

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 8 p.

Subject/Index Terms

• TRT Terms: Alternatives analysis; Carburetors; Exhaust gases; Hydrocarbons; Pollutants; Speed; Surveys
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00224613
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: R & D Rept
• Files: TRIS
• Created Date: Jul 16 1974 12:00AM