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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)
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 |
1.1 |
1.1 |
1.1 |
1.1 |
1.1 |
1.1 |
1.1 |
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 |
14.4 |
14.4 |
14.4 |
14.4 |
14.4 |
14.4 |
14.4 |
14.4 |
14.4 |
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 |
40/20/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 |
20/15/50 |
20/15/50 |
20/15/50 |
Weight criteria for light 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 8,501 through 14,000 lbs |
GVWR 8,501 through 14,000 lbs |
GVWR 8,501 through 14,000 lbs |
GVWR 8,501 through 14,000 lbs |
GVWR 8,501 through 14,000 lbs |
GVWR 8,501 through 14,000 lbs |
GVWR 8,501 through 14,000 lbs |
GVWR 8,501 through 14,000 lbs |
GVWR 8,501 through 14,000 lbs |
GVWR 8,501 through 14,000 lbs |
Test procedure (gasoline)c |
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 |
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 |
Complete Vehicles - (Grams per mile)h,l
GVWR 8,500 through 10,000 lbs |
|
|
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NMOGi |
0.28 |
0.28 |
e |
NMHCj |
e |
e |
0.195 |
CO |
7.3 |
7.3 |
7.3 |
NOx |
0.9 |
0.9 |
0.2 |
Particulates |
e |
e |
0.02 |
HCHO |
e |
e |
0.032 |
GVWR 10,001 lbs through 14,000 lbs |
|
|
|
NMOGi |
0.33 |
0.33 |
e |
NMHCj |
e |
e |
0.230 |
CO |
8.1 |
8.1 |
8.1 |
NOx |
1.0 |
1.0 |
0.4 |
Particulates |
e |
e |
0.02 |
HCHO |
e |
e |
0.040 |
Test Procedurek |
EPA HD-UDDS |
EPA HD-UDDS |
EPA HD-UDDS |
KEY: CO = carbon monoxide; HC = hydrocarbon;NOx
= nitrogen oxides; NMHC = nonmethane hydrocarbons; NMOG = nonmethane
organic gas; HCHO = formaldeyhyde.
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 the engine certification section of 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.
h Starting in 2005, complete gasoline heavy-duty vehicles
of 14,000 lbs GVWR or below will have to be chassis certified.
i The manufacturer has the option of satisfying this
standard by measurement of nonmethane hydrocarbons or total hydrocarbons.
j The manufacturer has the option of satisfying this
standard by measurement of nonmethane organic gas or total hydrocarbons.
k This test procedure currently exists to test complete
vehicles that have been optionally chassis certified. However, chassis certification
is not required until 2005.
l Required for complete gasoline heavy-duty vehicles
only.
NOTE: Tables 4-32a and 4-32b are 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, personal communication, October 2001.
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