[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: 40CFR86.092-2]

[Page 184-185]
 
                   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. 86.092-2  Definitions.

    The definitions of Sec. 86.091-2 remain effective. The definitions 
listed in this section apply beginning with the 1992 model year.
    (a) Proven emission control systems are emission control components 
or systems (and fuel metering systems) that have completed full 
durability testing evaluation over a vehicle's useful life in some other 
certified engine family, or have completed bench or road testing 
demonstrated to be equal or more severe than certification mileage 
accumulation requirements. Alternatively, proven components or systems 
are those that are determined by EPA to be of comparable functional 
quality and manufactured using comparable materials and production 
techniques as components or systems which have been durability 
demonstrated in some other certified engine family. In addition, the 
components or systems must be employed in an operating environment 
(e.g., temperature, exhaust flow, etc.,) similar to that experienced by 
the original or comparable components or systems in the original 
certified engine family.
    (b) Unproven emission control systems are emission control 
components or systems (and fuel metering systems) that do not qualify as 
proven emission control systems.
    (c) Similar systems are engine, fuel metering and emission control 
system combinations which use the same fuel (e.g., gasoline, diesel, 
etc.), combustion cycle (i.e., two or four stroke), general type of fuel 
system (i.e., carburetor or fuel injection), catalyst system (e.g., 
none, oxidization, three-way plus oxidization, three-way only, etc.), 
fuel

[[Page 185]]

control system (i.e., feedback or non-feedback), secondary air system 
(i.e., equipped or not equipped) and EGR (i.e., equipped or not 
equipped).
    (d) Conveniently available service facility and spare parts for 
small-volume manufacturers means that the vehicle manufacturer has a 
qualified service facility at or near the authorized point of sale or 
delivery of its vehicles and maintains an inventory of all emission-
related spare parts or has made arrangements for the part manufacturers 
to supply the parts by expedited shipment (e.g., utilizing overnight 
express delivery service, UPS, etc.).

[55 FR 7187, Feb. 28, 1990]