SHORT TEST CORRELATION TESTING OF 147 IN-USE 1974 MODEL YEAR LIGHT DUTY VEHICLES

Implementation of Section 207(b) of the Clean Air Act, the warranty provision, is contingent upon the identification of a short test that yields emission results that are 'reasonably capable of being correlated with' emission results obtained by the Federal Test Procedure (FTP). Between October 1974 and April 1975, the Environmental Protection Agency tested 147 in-use 1974 model year vehicles to gather data to be used for the evaluation of the degree of correlation that exists between emissions as measured by the FTP and by five short tests. The tests evaluated in this program are: the Clayton key mode, the Federal three mode, a high speed unloaded test, the Federal short cycle, and a composite of the New Jersey and New York short tests. The short tests are described in this report, and test results are presented.

• Corporate Authors:

  Environmental Protection Agency

  Emission Control Technology Division, 2565 Plymounth Road
  Ann Arbor, MI  United States  48105
• Authors:
  • Bohl, J
• Publication Date: 1976-7

Media Info

• Pagination: 187 p.

Subject/Index Terms

• TRT Terms: Automobiles; Automobiles by type; Classification; Correlation analysis; Data collection; Delivery vehicles; Exhaust gases; Light trucks; Measuring instruments; Methodology; Pollutants; Testing; Tests
• Uncontrolled Terms: Experimental data; Vehicle make
• Old TRIS Terms: Emission rates
• Subject Areas: Data and Information Technology; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00147053
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: EPA/460/2-76/001 Final Rpt.
• Files: TRIS
• Created Date: Feb 16 1977 12:00AM