CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 86—CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES > SUBPART O—Emission Regulations for New Gasoline-Fueled Otto-Cycle Light-Duty Vehicles and New Gasoline-Fueled Otto-Cycle Light-Duty Trucks; Certification Short Test Procedures (§86.1401 to > 86.1406—Equipment required and specifications; overview.

86.1406—Equipment required and specifications; overview.

(a) Exhaust emission tests. All vehicles subject to this subpart are tested for exhaust emissions.
(1) Dynamometer. (i) When a CST employs steady state loaded operation, the dynamometer must be adjusted to the lowest available inertia weight setting and must meet the load speed relationships described in § 86.1439(d). When a CST employs transient loaded warmup operation or loaded preconditioning, the dynamometer must be adjusted to the power absorption unit and inertia weight settings as described in § 86.129 of this part.
(ii) All other requirements of this paragraph are set forth in §§ 85.2230 and 85.2233 of this chapter.
(2) Exhaust gas analysis system. (i) The requirements for the exhaust gas analysis system are set forth in §§ 85.2225 and 85.2233 of this chapter, except that the NO channel is optional. For the purposes of the CST, non-dispersive infrared analyzers are specified for measuring emissions.
(ii) If desired, the line extending between the sample probe and the analyzer may be insulated to minimize condensation.
(b) Fuel and analytical tests. Fuel requirements for the CST are specified in §§ 86.113, 86.213, and 86.1413.

Code of Federal Regulations

[58 FR 58426, Nov. 1, 1993; 59 FR 33913, July 1, 1994]