Table 4-32a,,,,,,,,,,,, Federal Exhaust Emissions Certification Standards for Newly Manufactured Gasoline- and Diesel-Powered Light,,,,,,,,,,,, Heavy-Duty Trucks ,,,,,,,,,,,, (Grams per brake horsepower-hour),,,,,,,,,,,, Engine type and pollutant,1970-73,1974-78,1979-83,1984,1985-86,1987,1988-89,1990,1991-93,1994-97,1998-2003,2004+ Gasoline,,,,,,,,,,,, HC + NOx,e,16,10,,e,,,,,,, HC,f,e,1.5,,1.9,1.1,,,,,, NOx,e,,,,10.6,,,6.0,5.0,,4.0, CO,f,40,25,,37.1,14.4,,,,,, Diesel,,,,,,,,,,,, HC + NOx,e,16,10,e,,,,,,,, HC,f,e,1.5,1.3,,,,,,,, NOx,e,,,10.7,,,,6.0,5.0,,4.0, Nonmethane HC + NOx,e,,,,,,,,,,,2.4g CO,f,40,25,15.5,,,,,,,, Particulates,e,,,,,,0.60 ,,0.25,0.10 ,, Smoke opacity (acceleration/lugging/peak) a,40/20/e,20/15/50,,,,,,,,,, Weight criteria for light heavy-duty trucks b,"GVWR over 6,000 lbs",,"GVWR over 8,500 lbs",,,"GVWR 8,501 through 14,000",,,,,, Test procedure (gasoline)c,9-mode steady-state,,,,MVMA transient,,,,,,, (diesel) c,13-mode steady-state,,,EPA transient,,,,,,,, Useful life (gasoline) d,"5 years/50,000 miles",,,,"8 years/110,000 miles",,,,,,, ,,,,,,,,,,,, "a Smoke opacity is expressed in percentage for acceleration, lugging, and peak modes (acceleration/lugging/peak). Lugging is when a vehicle is carrying a load.",,,,,,,,,,,, ,,,,,,,,,,,, b Gross vehicle weight rating (GVWR) is the maximum design loaded weight.,,,,,,,,,,,, ,,,,,,,,,,,, c Several testing procedures have been used during the course of exhaust emissions control. A steady-state 9-mode test procedure (13-mode for diesel) was used for ,,,,,,,,,,,, "1970-83 standards. For 1984, either the steady-state tests or the U.S. Environmental Protection Agency (EPA) transient test procedure could be used. For diesels, the ",,,,,,,,,,,, "EPA transient test was required from 1985 to the present. For gasoline-powered vehicles, either the EPA or the Motor Vehicle Manufacturers Association (MVMA) ",,,,,,,,,,,, "transient test procedure could be used during 1985-86, and the MVMA procedure was required thereafter. ",,,,,,,,,,,, ,,,,,,,,,,,, "d Emissions standards apply to the useful life of the vehicle. Useful life was 5 years/50,000 miles through 1983, and 8 years/110,000 miles for model year 1985 and after. ",,,,,,,,,,,, 1984 was a transitional year in which vehicles could meet the older standard (and test procedure) or the newer one. Useful life requirement for gasoline-powered ,,,,,,,,,,,, "trucks meeting NOx standards for 1998 and after is 10 years/110,000 miles. The useful life requirements for heavy-duty diesel truck standards are more complex and ",,,,,,,,,,,, "vary by vehicle weight, pollutant, test procedure, and year. Consult the U.S. Code of Federal Regulations for further information.",,,,,,,,,,,, ,,,,,,,,,,,, e No standard set.,,,,,,,,,,,, ,,,,,,,,,,,, "f Although emissions standards for HC and CO were in effect for these years, they were not measured in grams per brake horsepower-hour and are, therefore, ",,,,,,,,,,,, incompatible with this table.,,,,,,,,,,,, ,,,,,,,,,,,, "g Vehicles can meet a composite nonmethane HC and NOx standard of 2.5, given they meet a nonmethane HC standard of no more than 0.5.",,,,,,,,,,,, ,,,,,,,,,,,, KEY: CO = carbon monoxide; HC = hydrocarbon; NOX = nitrogen oxides.,,,,,,,,,,,, ,,,,,,,,,,,, "SOURCES: 40 CFR 86, Subpart A (July 1, 1998); U.S. Environmental Protection Agency, Office of Air and Radiation, personnal communication, April 1999.",,,,,,,,,,,, ,,,,,,,,,,,, NOTE: Tables 4-31a and 4-31b are identical for diesel.,,,,,,,,,,,,