LIGHT-DUTY DIESEL GASEOUS EMISSIONS MEASUREMENT - COMPARISON OF DILUTION TUNNEL TEST RESULTS TO CERTIFICATION CELL TEST RESULTS
This report summarizes gaseous emissions data for eleven light-duty diesel vehicles using both the standard certification test procedure and the dilution tunnel test procedure which incorporates particulate measurement. The greatest variability was found in the HC variability inherent in measuring HC and, in the extreme cases, also to equipment inconsistencies between the test cells, CO, NOx and CO2 data from the dilution tunnel test procedure were generally in good agreement with the certification data with the only trend being slightly lower NOx and CO2 values from the dilution tunnel. This is hypothesized as a possible dynamometer effect. It is concluded that there are no significant differences in the two test procedures with regards to the measurement of gaseous emissions.
Environmental Protection AgencyStandards Development & Support Branch, 2565 Plymouth Road
Ann Arbor, MI United States 48105
- Alson, J
- Publication Date: 1979-1
- Pagination: 13 p.
- TRT Terms: Air pollution; Alternatives analysis; Carbon dioxide; Carbon monoxide; Concentration (Chemistry); Diesel engines; Exhaust gases; Hydrocarbons; Measurement; Nitric oxide; Nitrogen oxides; Particulates; Tests
- Subject Areas: Highways; Vehicles and Equipment;
- Accession Number: 00312784
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: SDSB-79/04
- Files: TRIS
- Created Date: May 7 1980 12:00AM