Table 4-34: Federal Exhaust Emission Certification Standards for Newly Manufactured Gasoline- and Diesel-Powered Light-Duty Trucks (Category LDT4)
Table 4-34: Federal Exhaust Emission Certification Standards for Newly Manufactured Gasoline- and Diesel-Powered Light-Duty Trucks (Category LDT4)
(Grams per mile)
Engine type and pollutant | Prior to controlg | 1968-1969 | 1970-1971 | 1972 | 1973-1974 | 1975 | 1976-1978 | 1979-1981 | 1982-1983 | 1984 | 1985-1986 | 1987 | 1988-1989 | 1990 | 1991-1995 | Tier 1k 1996-2007 | Interim Tier 2k 2008 | Tier 2k 2009+ |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | 0.80 | 0.80 | j (0.8) | j | j |
NMHC | h | j | j | j | j | j | j | j | j | j | j | j | j | j | j | 0.39 (0.56) | j | j |
NMOG | h | j | j | j | j | j | j | j | j | j | j | j | j | j | j | j | 0.160 (0.230) | 0.125 (0.156) |
CO | 80 | i | 23 | 39 | 39 | 20 | 20 | 18 | 18 | 10 | 10 | 10 | 10 | 10 | 10 | 5 (7.3) | 4.4 (6.4) | 3.4 (4.2) |
Cold-temp. COd | h | j | j | j | j | j | j | j | j | j | j | j | j | j | j | 12.5 (j) | 12.5 (j) | 12.5 (j) |
NOx | 4 | j | j | j | 3.0 | 3.1 | 3.1 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 1.7 | 1.7 | 1.1 (1.53) | 0.4 (0.6) | 0.14 (0.20) |
Particulates | h | j | j | j | j | j | j | j | j | j | j | j | j | j | j | j (0.12) | 0.08 (0.08) | 0.02 (0.02) |
Formaldehyde | h | j | j | j | j | j | j | j | j | j | j | j | j | j | j | j | 0.018 (0.027) | 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 | 0.80 | 0.80 | j (0.8) | j | j |
NMHC | h | j | j | j | j | j | j | j | j | j | j | j | j | j | j | 0.39 (0.56) | j | j |
NMOG | h | j | j | j | j | j | j | j | j | j | j | j | j | j | j | j | j (0.230) | 0.125 (0.156) |
CO | 80 | j | j | j | j | j | 20 | 18 | 18 | 10 | 10 | 10 | 10 | 10 | 10 | 5 (7.3) | j (6.4) | 3.4 (4.2) |
NOx | 4 | j | j | j | j | j | 3.1 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 1.7 | 1.7 | j (1.53) | j (0.6) | 0.14 (0.20) |
Particulates | h | j | j | j | j | j | j | j | 0.60 | 0.60 | 0.60 | 0.50 | 0.45 | 0.45 | 0.13 | j (0.12) | j (0.08) | 0.02 (0.02) |
Formaldehyde | h | j | j | j | j | j | j | j | j | j | j | j | j | j | j | j | j (0.027) | 0.015 (0.018) |
LDT4 weight criteriae | 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 | Any ALVW | Any ALVW | Any ALVW | ALVW over 5,750 pounds | ALVW over 5,750 pounds | ALVW over 5,750 pounds | |
LDT4 weight criteriae | 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 6,001-8,500 pounds | GVWR 6,001-8,500 pounds | GVWR 6,001-8,500 pounds | GVWR 6,001-8,500 pounds | GVWR 6,001-8,500 pounds | GVWR 6,001-8,500 pounds | |
Test procedureb | 7-mode | 7-mode | CVS-72 | CVS-73 | CVS-75 | CVS-76 | CVS-77 | CVS-78 | CVS-79 | CVS-80 | CVS-81 | CVS-82 | CVS-83 | CVS-84 | CVS-85 | CVS-86 | CVS-87 | |
Useful life, intermediatec,f | j | j | j | j | j | j | j | j | j | j | j | j | j | j | 5 years/50,000 miles | 6 years/50,000 miles | 7 years/50,000 miles | |
Useful life, full | 5 years/50,000 miles | 6 years/50,000 miles | 7 years/50,000 miles | 8 years/50,000 miles | 9 years/50,000 miles | 10 years/50,000 miles | 11 years/50,000 miles | 12 years/50,000 miles | 13 years/50,000 miles | 11 years/120,000 miles | 12 years/120,000 miles | 13 years/120,000 miles | 14 years/120,000 miles | 15 years/120,000 miles | 16 years/120,000 miles | 17 years/120,000 miles | 18 years/120,000 miles |
KEY: ALVW=adjusted loaded vehicle weight; CO = carbon monoxide; GVWR=gross vehicle weight rating; HC = hydrocarbons; NMHC=nonmethane hydrocarbon; 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 LDT1, LDT2, and LDT3 are given in tables 4-30a, 4-40b, and 4-30c.
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 the 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 2002. These standards are not shown in this table.
c Emissions standards had to be met for a full 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 1996, emissions standards were established for an intermediate useful life of 5 years/50,000 miles as well as a full useful life of 11 years/120,000 miles (intermediate and full useful life standards are shown in parentheses). This applied to all pollutants except HC and particulates for all LDT4 vehicles and NOx for diesel-powered LDT4 vehicles, which were only required to meet full useful life standards. Tier 1 exhaust standards were phased-in during 1996-97 at a rate of 50% and 100%, respectively.
d The cold CO emissions standard is measured at 20 0F (rather than 75 0F) and is applicable for a 5-year/50,000-mile useful life.
e GVWR is the maximum design loaded weight. ALVW is the numerical average of the GVWR and the curb weight.
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 control" column reports emissions estimates of a typical newly manufactured car in the years before exhaust emissions certification standards 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 2 refers to an intermediate level of standards that moves 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 particulate matter (HC and non-methane HC 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 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 LDT4 vehicles is 0.6 grams/mile. Tier 2 standards will be phased in during 2008 and 2009. In 2008, 50% of LDT4 vehicles must meet Tier 2 standards; the others must meet Interim Tier 2 standards. Beginning in 2009, all LDT4 vehicles must meet Tier 2 standards.
SOURCES
40 CFR 86, Subpart A (July 1, 2000).
Federal Register, Vol. 65, No. 28, pp. 6851-6858.