Motor Vehicle Emissions Variability.

  title={Motor Vehicle Emissions Variability.},
  author={Gary A Bishop and Donald H. Stedman and Lowell L. Ashbaugh},
  journal={Journal of the Air & Waste Management Association},
  volume={46 7},
Test-to-test variability has been observed by many current testing methods, including the Federal Test Procedure, the IM240 dynamometer test, the idle test common to many Inspection and Maintenance programs, and on-road remote sensing. The variability is attributable to the vehicle, not to the testing procedure. Because the vehicles are the dominant source of variability, the only way such vehicles can be reliably identified is through the use of multiple tests. The emissions variability… CONTINUE READING

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