[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: 40CFR89.117]

[Page 59]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 89--CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION 
ENGINES--Table of Contents
 
       Subpart B--Emission Standards and Certification Provisions
 
Sec. 89.117  Test fleet selection.

    (a) The manufacturer must select for testing, from each engine 
family, the engine with the most fuel injected per stroke of an 
injector, primarily at the speed of maximum torque and secondarily at 
rated speed.
    (b) Each engine in the test fleet must be constructed to be 
representative of production engines.
    (c) After review of the manufacturer's test fleet, the Administrator 
may select from the available fleet one additional test engine from each 
engine family.
    (d) For establishing deterioration factors, the manufacturer shall 
select the engines, subsystems, or components to be used to determine 
exhaust emission deterioration factors for each engine-family control 
system combination. Engines, subsystems, or components shall be selected 
so that their emission deterioration characteristics are expected to 
represent those of in-use engines, based on good engineering judgment.

[59 FR 31335, June 17, 1994. Redesignated and amended at 63 FR 56995, 
57003, Oct. 23, 1998]