[Code of Federal Regulations]
[Title 40, Volume 18]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR88.311-93]
[Page 32-33]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 88--CLEAN-FUEL VEHICLES--Table of Contents
Subpart C--Clean-Fuel Fleet Program
Sec. 88.311-93 Emissions standards for Inherently Low-Emission Vehicles.
(a) Certification. (1) Emissions Testing Procedures. A vehicle shall
be certified as an ILEV if that vehicle satisfies the following
conditions:
(i) The vehicle shall be certified under the appropriate exhaust
emissions standards from paragraph (c) or (d) of this section depending
on the vehicle's weight classification.
(ii) The vehicle shall be certified as having fuel vapor emissions
which are five or less total grams per test as measured by the current
Federal Test Procedure (FTP), modified for ILEV certification, from 40
CFR part 86, subpart B for LDVs and LDTs and from 40 CFR part 86,
subpart M for HDVs.
(A) After disabling any and all auxiliary emission control devices
(canister, purge system, etc.) related to control of evaporative
emissions, the fuel vapor emissions shall be measured using the FTP
regulations in effect at the time the vehicle is to be certified as an
ILEV. For purposes of this section, the vehicle's fuel vapor emissions
shall consist of the total grams of diurnal, hot soak, running loss, and
resting loss emissions, as appropriate, for the particular fuel/vehicle/
engine combination to be tested. In determining ILEV evaporative
emissions, the diurnal emissions measurement procedure shall consist of
a single diurnal heat build using an ambient or fuel temperature range
of 72 deg.-96 deg.F (22 deg.-36 deg.C), as appropriate for the
applicable FTP regulations (40 CFR part 86).
[[Page 33]]
(B) Conventional Federal Test Procedure. A vehicle with no
evaporative emissions control system components may have its evaporative
emissions certified for its particular GVWR weight class/subclass if it
passes the conventional evaporative emissions FTP from 40 CFR part 86,
subpart B for LDVs and LDTs or from 40 CFR part 86, subpart M for HDVs,
as applicable.
(iii) The vehicle must meet other special requirements applicable to
conventional or clean-fuel vehicles and their fuels as described in any
other parts of this chapter, including 40 CFR parts 86 and 88.
(2) Vehicles which have a closed or sealed fuel system may be
certified at the administrator's option by engineering evaluation in
lieu of testing. These vehicles will be certified as ILEVs only if a
leak in the fuel system would result in the vehicle becoming inoperative
due to loss of fuel supply, or if half the fuel escapes within 24 hours.
(b) Identification. In the application for a vehicle's certification
as an ILEV, the manufacturer or the manufacturer's agent shall provide
for positive identification of the vehicle's status as an ILEV in the
vehicle's Vehicle Emission Control Information (VECI) label in
accordance with 40 CFR 86.094-35 and 86.095-35. The label shall contain
a highlighted statement (e.g., underscored or boldface letters) that the
vehicle is certified to applicable emission standards for ILEV exhaust
and evaporative emission standards.
(c) Light-duty vehicles and light-duty trucks. ILEVs in LDV and LDT
classes shall have exhaust emissions which do not exceed the LEV exhaust
emission standards for NMOG, CO, HCHO, and PM and the ULEV exhaust
emission standards for NOX listed in Tables A104-1 through
A104-6 for light-duty CFVs. Exhaust emissions shall be measured in
accordance with the test procedures specified in Sec. 88.104-94(k). An
ILEV must be able to operate on only one fuel, or must be certified as
an ILEV on all fuels on which it can operate. These vehicles shall also
comply with all requirements of 40 CFR part 86 which are applicable to
conventional gasoline-fueled, methanol-fueled, diesel-fueled, natural
gas-fueled or liquified petroleum gas-fueled LDVs/LDTs of the same
vehicle class and model year.
(d) Heavy-duty vehicles. ILEVs in the HDV class shall have exhaust
emissions which do not exceed the exhaust emission standards in grams
per brake horsepower-hour listed in Sec. 88.105-94(d). Exhaust emissions
shall be measured in accordance with the test procedures specified in
Sec. 88.105-94(e). An ILEV must be able to operate on only one fuel, or
must be certified as an ILEV on all fuels on which it can operate. These
vehicles shall also comply with all requirements of 40 CFR part 86 which
are applicable in the case of conventional gasoline-fueled, methanol-
fueled, diesel-fueled, natural gas-fueled or liquified petroleum gas-
fueled HDVs of the same weight class and model year.
(e) Applicability. State actions to opt out of the clean-fuel fleet
program under section 182(c) of the Act do not affect the applicability
of the ILEV program in the affected states.
[57 FR 60046, Dec. 17, 1992, as amended at 59 FR 48536, Sept. 21, 1994;
59 FR 50082, Sept. 30, 1994, 61 FR 127, Jan. 3, 1996]