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Table 4-32a. Federal Exhaust Emissions Certification Standards for Newly Manufactured Gasoline- and Diesel-Powered Light Heavy-Duty Trucks (Grams per brake horsepower-hour)
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CSV
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| e |
16 |
10 |
10 |
e |
e |
e |
e |
e |
e |
e |
e |
| f |
e |
1.5 |
1.5 |
1.9 |
1.1 |
1.1 |
1.1 |
1.1 |
1.1 |
1.1 |
1.1 |
| e |
e |
e |
e |
10.6 |
10.6 |
10.6 |
6.0 |
5.0 |
5.0 |
4.0 |
4.0 |
| f |
40 |
25 |
25 |
37.1 |
14.4 |
14.4 |
14.4 |
14.4 |
14.4 |
14.4 |
14.4 |
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| e |
16 |
10 |
e |
e |
e |
e |
e |
e |
e |
e |
e |
| f |
e |
1.5 |
1.3 |
1.3 |
1.3 |
1.3 |
1.3 |
1.3 |
1.3 |
1.3 |
1.3 |
| e |
e |
e |
10.7 |
10.7 |
10.7 |
10.7 |
6.0 |
5.0 |
5.0 |
4.0 |
4.0 |
| e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
2.4g |
| f |
40 |
25 |
15.5 |
15.5 |
15.5 |
15.5 |
15.5 |
15.5 |
15.5 |
15.5 |
15.5 |
| e |
e |
e |
e |
e |
e |
0.60 |
0.60 |
0.25 |
0.10 |
0.10 |
0.10 |
| 40/20/e |
20/15/50 |
20/15/50 |
20/15/50 |
20/15/50 |
20/15/50 |
20/15/50 |
20/15/50 |
20/15/50 |
20/15/50 |
20/15/50 |
20/15/50 |
| GVWR over 6,000 lbs |
GVWR over 6,000 lbs |
GVWR over 8,500 lbs |
GVWR over 8,500 lbs |
GVWR over 8,500 lbs |
GVWR 8,501 through 14,000 |
GVWR 8,501 through 14,000 |
GVWR 8,501 through 14,000 |
GVWR 8,501 through 14,000 |
GVWR 8,501 through 14,000 |
GVWR 8,501 through 14,000 |
GVWR 8,501 through 14,000 |
| 9-mode steady-state |
9-mode steady-state |
9-mode steady-state |
9-mode steady-state |
MVMA transient |
MVMA transient |
MVMA transient |
MVMA transient |
MVMA transient |
MVMA transient |
MVMA transient |
MVMA transient |
| 13-mode steady-state |
13-mode steady-state |
13-mode steady-state |
EPA transient |
EPA transient |
EPA transient |
EPA transient |
EPA transient |
EPA transient |
EPA transient |
EPA transient |
EPA transient |
5 years/
50,000 miles |
5 years/
50,000 miles |
5 years/
50,000 miles |
5 years/
50,000 miles |
8 years/
110,000 miles |
8 years/
110,000 miles |
8 years/
110,000 miles |
8 years/
110,000 miles |
8 years/
110,000 miles |
8 years/
110,000 miles |
8 years/
110,000 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.
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