[Code of Federal Regulations]
[Title 40, Volume 17]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR86.085-2]
[Page 94-96]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 86_CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND
ENGINES--Table of Contents
Subpart A_General Provisions for Emission Regulations for 1977 and Later
Sec. 86.085-2 Definitions.
The definitions of Sec. 86.084-2 remain effective. The definitions
listed in this section apply beginning with the 1985 model year.
Abnormally treated vehicle, any diesel light-duty vehicle or diesel
light-duty truck that is operated for less than five miles in a 30 day
period immediately prior to conducting a particulate emissions test.
Composite particulate standard, for a manufacturer which elects to
average diesel light-duty vehicles and diesel light-duty trucks together
in the particulate averaging program, means that standard calculated
according to the following equation and rounded to the nearest hundredth
gram-per-mile:
[GRAPHIC] [TIFF OMITTED] TR06OC93.004
[[Page 95]]
Where:
PRODLDV represents the manufacturer's total diesel light-duty
vehicle production for those engine families being included in the
average for a given model year.
STDLDV represents the light-duty vehicle particulate
standard.
PRODLDT represents the manufacturer's total diesel light-duty
truck production for those engine families being included in the average
for a given model year.
STDLDT represents the light-duty truck particulate standard.
Family particulate emission limit means the diesel particulate
emission level to which an engine family is certified in the particulate
averaging program, expressed to an accuracy of one hundredth gram-per-
mile.
Incomplete gasoline-fueled heavy-duty vehicle means any gasoline-
fueled heavy-duty vehicle which does not have the primary load-carrying
device, or passenger compartment, or engine compartment or fuel system
attached.
Production-weighted average means the manufacturer's production-
weighted average particulate emission level, for certification purposes,
of all of its diesel engine families included in the particulate
averaging program. It is calculated at the end of the model year by
multiplying each family particulate emission limit by its respective
production, summing these terms, and dividing the sum by the total
production of the effected families. Those vehicles produced for sale in
California or at high altitude shall each be averaged separately from
those produced for sale in any other area.
Primary intended service class means:
(a) The primary service application group for which a heavy-duty
diesel engine is designed and marketed, as determined by the
manufacturer. The primary intended service classes are designated as
light, medium, and heavy heavy-duty diesel engines. The determination is
based on factors such as vehicle GVW, vehicle usage and operating
patterns, other vehicle design characteristics, engine horsepower, and
other engine design and operating characteristics.
(1) Light heavy-duty diesel engines usually are non-sleeved and not
designed for rebuild; their rated horsepower generally ranges from 70 to
170. Vehicle body types in this group might include any heavy-duty
vehicle built for a light-duty truck chassis, van trucks, multi-stop
vans, recreational vehicles, and some single axle straight trucks.
Typical applications would include personal transportation, light-load
commercial hauling and delivery, passenger service, agriculture, and
construction. The GVWR of these vehicles is normally less than 19,500
lbs.
(2) Medium heavy-duty diesel engines may be sleeved or non-sleeved
and may be designed for rebuild. Rated horsepower generally ranges from
170 to 250. Vehicle body types in this group would typically include
school buses, tandem axle straight trucks, city tractors, and a variety
of special purpose vehicles such as small dump trucks, and trash
compactor trucks. Typical applications would include commercial short
haul and intra-city delivery and pickup. Engines in this group are
normally used in vehicles whose GVWR varies from 19,500-33,000 lbs.
(3) Heavy heavy-duty diesel engines are sleeved and designed for
multiple rebuilds. Their rated horsepower generally exceeds 250.
Vehicles in this group are normally tractors, trucks, and buses used in
inter-city, long-haul applications. These vehicles normally exceed
33,000 lbs GVWR.
Useful life means:
(a) For light-duty vehicles a period of use of 5 years or 50,000
miles, whichever first occurs.
(b) For a light-duty truck engine family, a period of use of 11
years or 120,000 miles, whichever occurs first.
(c) For a gasoline-fueled heavy-duty engine family (and in the case
of evaporative emission regulations, for gasoline-fueled heavy-duty
vehicles), a period of use of 8 years or 110,000 miles, whichever first
occurs.
(d) For a diesel heavy-duty engine family:
(1) For light heavy-duty diesel engines, a period of use of 8 years
or 110,000 miles, whichever first occurs.
(2) For medium heavy-duty diesel engines, a period of use of 8 years
or 185,000 miles, whichever first occurs.
(3) For heavy heavy-duty diesel engines, a period of use of 8 years
or 290,000 miles, whichever first occurs.
(e) As an option for both light-duty truck and heavy-duty engine
families,
[[Page 96]]
an alternative useful life period assigned by the Administrator under
the provisions of paragraph (f) of Sec. 86.085-21.
(f) The useful-life period for purposes of the emissions defect
warranty and emissions performance warranty shall be a period of 5
years/50,000 miles whichever first occurs, for light-duty trucks,
gasoline heavy-duty engines, and light heavy-duty diesel engines. For
all other heavy-duty diesel engines the aforementioned period is 5
years/100,000 miles, whichever first occurs. However, in no case may
this period be less than the manufacturer's basic mechanical warranty
period for the engine family.
[48 FR 33462, July 21, 1983, as amended at 48 FR 52184, Nov. 16, 1983;
52 FR 47863, Dec. 16, 1987]