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Table 4-32b: Federal Exhaust Emissions Certification
Standards for Newly Manufactured Gasoline- and Diesel-Powered Heavy-Duty
Trucks
(Grams per brake horsepower-hour)
Excel | CSV
Gasoline |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
HC + NOx |
e |
16 |
10 |
10 |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
NOx + NMHC |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
1.0 |
1.0 |
e |
NMHC |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
0.14 |
HC |
f |
e |
1.5 |
1.5 |
1.9 |
1.9 |
1.9 |
1.9 |
1.9 |
1.9 |
1.9 |
1.9 |
e |
e |
e |
NOx |
e |
e |
e |
e |
10.6 |
10.6 |
10.6 |
6.0 |
5.0 |
5.0 |
4.0 |
4.0 |
e |
e |
0.20 |
CO |
f |
40 |
25 |
25 |
37.1 |
37.1 |
37.1 |
37.1 |
37.1 |
37.1 |
37.1 |
37.1 |
37.1 |
37.1 |
14.4 |
Particulates |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
0.01 |
Diesel |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
HC + NOx |
e |
16 |
10 |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
HC |
f |
e |
1.5 |
1.3 |
1.3 |
1.3 |
1.3 |
1.3 |
1.3 |
1.3 |
1.3 |
e |
e |
e |
e |
NOx |
e |
e |
e |
10.7 |
10.7 |
10.7 |
10.7 |
6.0 |
5.0 |
5.0 |
4.0 |
e |
e |
0.20 |
0.20 |
NOx + NMHC |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
2.4g |
2.4g+ |
e |
e |
NMHC |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
e |
0.14 |
0.14 |
CO |
f |
40 |
25 |
15.5 |
15.5 |
15.5 |
15.5 |
15.5 |
15.5 |
15.5 |
15.5 |
15.5 |
15.5 |
15.5 |
15.5 |
Particulates |
e |
e |
e |
e |
e |
e |
0.60 |
0.60 |
0.25 |
0.10 |
0.10 |
0.10 |
0.10 |
0.01 |
0.01 |
Smoke opacity (acceleration/lugging/peak)a |
40/20e |
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 |
20/15/50 |
20/15/50 |
20/15/50 |
Weight criteria for heavy heavy-duty trucksb |
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 over 14,000 lbs |
GVWR over 14,000 lbs |
GVWR over 14,000 lbs |
GVWR over 14,000 lbs |
GVWR over 14,000 lbs |
GVWR over 14,000 lbs |
GVWR over 14,000 lbs |
GVWR over 14,000 lbs |
GVWR over 14,000 lbs |
GVWR over 14,000 lbs |
Test procedure (gasoline)c |
13-mode steady-state |
13-mode steady-state |
13-mode steady-state |
13-mode steady-state |
MVMA transient |
MVMA transient |
MVMA transient |
MVMA transient |
MVMA transient |
MVMA transient |
MVMA transient |
MVMA transient |
MVMA transient |
MVMA transient |
MVMA transient |
Test procedure (diesel)c |
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 |
EPA transient |
EPA transient |
EPA transient |
Useful life (gasoline)d |
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 |
10 years/110,000 miles |
10 years/110,000 miles |
10 years/110,000 miles |
10 years/110,000 miles |
KEY: CO = carbon monoxide; HC = hydrocarbon; NOx
= nitrogen oxides; NMHC = nonmethane hydrocarbons.
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 became 8 years/110,000
miles beginning in model year 1985. 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. Starting in 2004, the useful life will
be 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 NMHC + NOx standard
of 2.5 g/bhp-h, given they meet a NMHC standard of no more than 0.5 g/bhp-h.
NOTES: Tables 4-32a and 4-32bare identical for
heavy-duty diesel engines.
SOURCES:
40 CFR 86, Electronic Code of Federal Regulations, internet site
at http://www.access.gpo.gov/nara/cfr/cfrhtml_00/Title_40/40cfr86_00.html
as of Oct. 9, 2001.
U.S. Environmental Protection Agency, Office of Transportation
and Air Quality, personnal communication, Oct. 2001.
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