A STUDY OF ONE GASOLINE-FUELED ENGINE LINE COMPARING EMISSION RESULTS BETWEEN 1969 ENGINES AND 1979 ENGINES ON THREE TEST PROCEDURES: THE HEAVY-DUTY TRANSIENT ENGINE TEST, THE HEAVY-DUTY 9-MODE ENGINE TEST, AND THE LIGHT-DUTY TRUCK CHASSIS TEST
The 1977 Amendments to the Clean Air Act mandated EPA to set new emission standards for heavy-duty (HD) vehicles or engines for model years 1983 and 1985. These new standards were to represent a percentage reduction "from the average of the actually measured emission from heavy-duty gasoline-fueled vehicles or engines...manufactured during the baseline model year." EPA has initiated a testing program to determine the baseline emission levels. The testing program includes multiple transient tests on each baseline engine, during which emissions are measured by the critical flow venturi constant volume sample CFS-CVS technique. Additional testing on each engine includes the current 9-mode certification procedure modified to use the CVS bag procedure.
Environmental Protection AgencyStandards Development & Support Branch, 2565 Plymouth Road
Ann Arbor, MI United States 48105
- CLEMMENS, W B
- Cox, T P
- Publication Date: 1979-7
- Pagination: 20 p.
- TRT Terms: Air pollution; Engines; Exhaust gases; Fuel consumption; Gasoline engines; Heavy vehicles; Light trucks; Performance evaluations; Test procedures; Trucks
- Old TRIS Terms: Truck engines
- Subject Areas: Energy; Highways; Motor Carriers; Vehicles and Equipment;
- Accession Number: 00313874
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: EPA-AA-SDSB-79-16 Tech Rpt.
- Files: TRIS
- Created Date: Jun 26 1980 12:00AM