[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]