|
|
|
Table 4-30a: Federal Exhaust Emission Certification
Standards for Newly Manufactured Gasoline- and Diesel-Powered Light Duty
Trucks (Category LDT1)a,b,c
(Grams per mile)
Excel | CSV
Gasoline |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
HC (total) |
11 |
i |
2.2 |
3.4 |
3.4 |
2.0 |
2.0 |
1.7 |
1.7 |
0.80 |
0.80 |
0.80 |
0.80 |
j R(0.80) |
j R(0.80) |
j |
j |
NMHC |
h |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
0.3(0.31) |
|
j |
j |
NMOG |
h |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
0.125 (0.156) |
0.100 (0.125) |
CO |
80 |
i |
23 |
39 |
39 |
20 |
20 |
18 |
18 |
10 |
10 |
10 |
10 |
3.4(4.2) |
3.4(4.2) |
3.4(4.2) |
3.4(4.2) |
Cold-temp. COd |
e |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
10 j |
10 j |
10 j |
10 j |
NOx |
4 |
j |
j |
j |
3.0 |
3.1 |
3.1 |
2.3 |
2.3 |
2.3 |
2.3 |
2.3 |
1.2 |
0.4(0.6) |
0.4(0.6) |
0.4(0.6) |
0.14 (0.20) |
Particulates |
h |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
0.08 (0.10) |
0.08 (0.08) |
0.02 (0.02) |
Formaldehyde |
h |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
0.015 (0.018) |
0.015 (0.018) |
Diesel |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
HC (total) |
11 |
j |
j |
j |
j |
j |
2.0 |
1.7 |
1.7 |
0.80 |
0.80 |
0.80 |
0.80 |
j (0.80) |
j (0.80) |
j |
j |
NMHC |
h |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
0.3 (0.31) |
0.3 (0.31) |
j |
j |
NMOG |
h |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j (0.156) |
0.100 (0.125) |
CO |
80 |
j |
j |
j |
j |
j |
20 |
18 |
18 |
10 |
10 |
10 |
10 |
3.4 (4.2) |
3.4 (4.2) |
j (4.2) |
3.4 (4.2) |
NOx |
4 |
j |
j |
j |
j |
j |
3.1 |
2.3 |
2.3 |
2.3 |
2.3 |
2.3 |
1.2 |
1.0 (1.25) |
1.0 (1.25) |
j (0.6) |
0.14 (0.20) |
Particulates |
h |
j |
j |
j |
j |
j |
j |
j |
0.60 |
0.60 |
0.60 |
0.26 |
0.26 |
0.26 0.26 |
0.08 (0.10) |
j (0.10) |
0.02 (0.02) |
Formaldehyde |
h |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j (0.018) |
0.015 (0.018) |
LDT1 weight criterae |
|
GVWR up through 6,000 pounds |
GVWR up through 6,000 pounds |
GVWR up through 6,000 pounds |
GVWR up through 6,000 pounds |
GVWR up through 6,000 pounds |
GVWR up through 6,000 pounds |
GVWR up through 8,500 pounds |
GVWR up through 8,500 pounds |
GVWR up through 8,500 pounds |
GVWR up through 8,500 pounds |
GVWR up through 8,500 pounds |
GVWR up through 6,000 lbs; LVW up through 3,750 pounds |
GVWR up through 6,000 lbs; LVW up through 3,750 pounds |
GVWR up through 6,000 lbs; LVW up through 3,750 pounds |
GVWR up through 6,000 lbs; LVW up through 3,750 pounds |
GVWR up through 6,000 lbs; LVW up through 3,750 pounds |
Test procedureb |
|
7-mode |
7-mode |
CVS-72 |
CVS-72 |
CVS-75 |
CVS-75 |
CVS-75 |
CVS-75 |
CVS-75 |
CVS-75 |
CVS-75 |
CVS-75 |
CVS-75 |
CVS-75 |
CVS-75 |
CVS-75 |
Useful life (intermediate)c,f |
|
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
j |
5 years/50,000 miles |
5 years/50,000 miles |
5 years/50,000miles |
5 years/50,000miles |
Useful life (full) |
|
5 years/50,000 miles |
5 years/50,000 miles |
5 years/50,000 miles |
5 years/50,000 miles |
5 years/50,000 miles |
5 years/50,000 miles |
5 years/50,000 miles |
5 years/50,000 miles |
5 years/50,000 miles |
11 years/120,000 miles |
11 years/120,000 miles |
11 years/120,000 miles |
10 years/100,000 miles |
10 years/100,000 miles |
10 years/100,000 miles |
10 years/ 20,000 miles |
KEY: CO=carbon monoxide; GVWR=gross vehicle weight rating;
HC=hydrocarbons; LVW=loaded vehicle weight; NMHC=nonmethane hydrocarbons; NMOG=
nonmethane organic gases; NOx=nitrogen oxides.
a Light-duty truck categories LDT1-LDT4 were not created
until 1994. From 1968 to 1978, all trucks with a GVWR up to 6,000 pounds were
classified as light-duty trucks and were required to meet the same standards.
As of 1979, the maximum weight was raised to 8,500 pounds GVWR. During 1988-93,
light duty trucks were divided into two subcategories that coincide with the
current LDT1-LDT4 categories. The standards for LDT2, LDT3, and LDT4 are shown
in tables 4-30b through 4-30d.
b The test procedure for measuring exhaust emissions
has changed several times over the course of vehicle emissions regulation. The
7-mode procedure was used through model year 1971 and was replaced by the CVS-72
procedure beginning in model year 1972. The CVS-75 procedure became the test
procedure as of model year 1975. While it may appear that total HC and CO standards
were relaxed in 1972-74, these standards were actually more stringent due to
the more stringent nature of the CVS-72 test procedure. Additional standards
for CO and composite standards for NMHC and NOx tested over the new Supplemental
Federal Test Procedure will be phased-in beginning with model year 2000. These
standards are not shown in this table.
c Emissions standards had to be met for a useful life
of 5 years/50,000 miles through model year 1983, and a full useful life of 11
years/120,000 miles was defined for 1985-93 (several useful life options were
available for 1984). Beginning in model year 1994, emissions standards were
established for an intermediate useful life of 5 years/50,000 miles as well
as a full useful life (full useful life standards are shown in parentheses).
HC standards, however, were established only for full useful life. Tier 1 exhaust
standards, except particulates standards, were phased in during 1994-96 at a
rate of 40%, 80%, and 100%, respectively. PM standards were phased-in at a rate
of 40%, 80%, and 100% during 1995-97.
d The cold CO emissions standard is measured at 20
degrees F (rather than 75 degrees F) and is applicable for a 5-year/50,000-mile
useful life.
e GVWR is the maximum design loaded weight. LVW is
the curb weight (nominal vehicle weight) plus 300 pounds.
f
Manufacturers can opt to certify vehicles for a full useful life of 15 years/150,000
miles and either have (1) intermediate useful life standards waived or (2) receive
additional NOx credits.
g The "Prior to controls" column reports
emissions estimates of a typical newly manufactured car in the years before
exhaust emissions certification standard were implemented.
h No estimate available.
i In 1968-69, exhaust emissions standards were issued
in parts per million rather than grams per mile and are, therefore, incompatible
with this table.
j No standard has been set.
k The term "tier" refers to a level of standards
for specific years. Interim Tier 2 refers to an intermediate level of standards
that move manufacturers toward compliance with Tier 2 standards. Interim Tier
2 and Tier 2 standards are established as "bins." Each bin is a set
of standards for NOx, CO, NMOG, formaldehyde, and particulates (HC and NMHC
standards are dropped for Tier 2 and Interim Tier 2). Manufacturers may certify
any given vehicle family to any of the bins available for that vehicle class
as long as the resulting sales-weighted corporate average NOx standard is met
for the full useful life. The Tier 2 corporate average NOx standard is 0.07
grams/mile. Interim corporate-based average NOx standards are based on vehicle
type. The interim corporate sales-weighted average for LDT1 vehicles is 0.3
grams/mile. Tier 2 standards will be phased in at a rate of 25% in 2004, 50%
in 2005, 75% in 2006, and 100% in 2007. During this period, all LDT1 vehicles
not meeting the Tier 2 standards must meet Interim Tier 2 standards.
SOURCE:
40 CFR 86, Subpart A (July 1, 2000) Federal Register,
Vol. 65, No. 28, pp. 6851-6858.
|
|