[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: 40CFR86.106-96]

[Page 407-408]
 
                   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 B_Emission Regulations for 1977 and Later Model Year New Light-
 
Sec. 86.106-96  Equipment required; overview.

    (a) This subpart contains procedures for exhaust emission tests on 
petroleum-fueled, natural gas-fueled, liquefied petroleum gas-fueled, 
and methanol-fueled light-duty vehicles and light-duty trucks, and for 
evaporative emission tests on gasoline-fueled, natural gas-fueled, 
liquefied petroleum gas-fueled, and methanol-fueled light-duty vehicles 
and light-duty trucks. Certain items of equipment are not necessary for 
a particular test, e.g., evaporative enclosure when testing petroleum-
fueled diesel vehicles. Alternate equipment, procedures, and calculation 
methods may be used if shown to yield equivalent or superior results, 
and if approved in advance by the Administrator. Equipment required and 
specifications are as follows:
    (1) Evaporative emission tests, gasoline-fueled vehicles. The 
evaporative emission test is closely related to and connected with the 
exhaust emission test. All vehicles tested for evaporative emissions 
must undergo testing according to the test sequences described in Sec. 
86.130-96; however, the Administrator may omit measurement of exhaust 
emissions to test for evaporative emissions. The Administrator may 
truncate a test after any valid emission measurement without affecting 
the validity of the test. Further, unless the evaporative emission test 
is waived by the Administrator under Sec. 86.090-26 or Sec. 86.1810, 
as applicable, all vehicles must undergo both tests. (Petroleum-fueled 
diesel vehicles are excluded from the evaporative emission standard.) 
Section 86.107 specifies the necessary equipment.
    (2) Exhaust emission tests. All vehicles subject to this subpart are 
subject to testing for both gaseous and particulate exhaust emissions 
using the CVS concept (see Sec. 86.109), except where exemptions or 
waivers are expressly provided in subpart A of this part. Vehicles 
subject to the ``Tier 0'' (i.e., phase-out) standards described under 
subpart

[[Page 408]]

A of this part are exempted from testing for methane emissions. Otto-
cycle vehicles subject to the ``Tier 0'' standards are waived from 
testing for particulates. For vehicles waived from the requirement for 
measuring particulate emissions, use of a dilution tunnel is not 
required (see Sec. 86.109). The CVS must be connected to the dilution 
tunnel if particulate emission sampling is required (see Sec. 86.110). 
Petroleum- and methanol-fueled diesel-cycle vehicle testing requires 
that a PDP-CVS or CFV-CVS with heat exchanger be used. (This equipment 
may be used with methanol-fueled Otto-cycle vehicles; however, 
particulates need not be measured for vehicles that are waived from the 
requirement). All vehicles equipped with evaporative canisters are 
preconditioned by loading the canisters with hydrocarbon vapors. 
Petroleum-fueled diesel vehicles are excluded from this requirement.
    (3) Fuel, analytical gas, and driving schedule specifications. Fuel 
specifications for exhaust and evaporative emissions testing and for 
mileage accumulation are specified in Sec. 86.113. Analytical gases are 
specified in Sec. 86.114. The EPA Urban Dynamometer Driving Schedule 
(UDDS) for use in exhaust emissions tests is specified in Sec. 86.115 
and appendix I of this part.
    (b) [Reserved]

[58 FR 16026, Mar. 24, 1993, as amended at 59 FR 48504, Sept. 21, 1994; 
60 FR 43888, Aug. 23, 1995; 64 FR 23921, May 4, 1999]