SOME ASPECTS OF DETERMINING NEW MOTOR VEHICLE ENGINE EMISSION LEVELS

Certification criteria make use of a factor that is defined to reflect deterioration of the emissions control system up through 50,000 miles of usage. This paper explains how the deterioration factor is used for projecting a 50,000-mile emission level from an observed 4,000-mile emission level. Recognition is given to the fact that the statistical properties of most of the observed and calculated variables need to be better understood. No attempt is made to provide answers to the statistical questions that are raised in the discussion. Useful approaches to some of the statistical problems are provided in hope that more attention will be given to a statistical base for evaluating emission-related systems.

  • Corporate Authors:

    Washington Academy of Sciences

    9650 Rockville Pike
    Washington, DC  United States  20014
  • Authors:
    • Hromi, J D
  • Publication Date: 1974-6

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Filing Info

  • Accession Number: 00263543
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 19 1974 12:00AM