A quantitative, periodic motor vehicle safety-inspection test for determining the leakage rate of engine exhaust from an automotive exhaust system was investigated. Two technical approaches were evaluated, and the better one was selected for development of necessary special equipment and test procedures. The results of the measurement are expressed as the diameter of a single round hole, equivalent in leakage rate to the sum of all leaks in the exhaust system being tested. This method is capable of measuring leaks equivalent in size down to about a 1/16-inch hole; discrimination between leaks of 1/8- to 1/2-inch diameter is reliable and easily achieved. Total time to conduct a test and evaluate results is estimated to be from two to five minutes.

  • Corporate Authors:

    Transportation Systems Center

    55 Broadway, Kendall Square
    Cambridge, MA  United States  02142
  • Authors:
    • Klaubert, E C
  • Publication Date: 1974-1

Media Info

  • Pagination: 108 p.

Filing Info

  • Accession Number: 00056932
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: DOT-TSC-NHTSA-72-10 Final Rpt
  • Files: NTIS
  • Created Date: Jul 22 1974 12:00AM