[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: 40CFR92.104]

[Page 422-423]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 92--CONTROL OF AIR POLLUTION FROM LOCOMOTIVES AND LOCOMOTIVE ENGINES--
Table of Contents
 
                       Subpart B--Test Procedures
 
Sec. 92.104  Locomotive and engine testing; overview.

    (a) The test procedures described here include specifications for 
both locomotive testing and engine testing.

[[Page 423]]

Unless specified otherwise in this subpart, all provisions apply to both 
locomotive and engine testing.
    (b)(1) The test procedures for engine testing are intended to 
produce emission measurements that are essentially identical to emission 
measurements produced during locomotive testing using the same engine 
configuration. The following requirements apply for all engine tests:
    (i) Engine speed and load for each mode shall be within 2 percent of 
the speed and load of the engine when it is operated in the locomotive.
    (ii) The temperature of the air entering the engine after any charge 
air cooling shall be within 5  deg.F of the typical intake air 
temperature when the engine is operated in the locomotive under similar 
ambient conditions. Auxiliary fan(s) may be used to maintain engine 
cooling during operation on the dynamometer.
    (iii) The engine air inlet system used during testing shall have an 
air inlet restriction within 1 inch of water of the upper limit of a 
typical engine as installed with clean air filters, as established by 
the manufacturer or remanufacturer for the engine being tested.
    (2) Testers performing engine testing under this subpart shall not 
use test procedures otherwise allowed by the provisions of this subpart 
where such procedures are not consistent with good engineering practice 
and the regulatory goal specified in paragraph (b)(1) of this section.
    (c) Provisions that specify different requirements for locomotive 
and/or engine testing are described in Secs. 92.106, 92.108(a) and 
(b)(1), 92.111(b)(2) and (c), 92.114(a)(2)(ii), (b)(3)(ii), 
(c)(2)(iii)(A) and (d), 92.115(c), 92.116, 92.123(a)(2) and (b), 
92.124(d), 92.125(a) and (b), 92.126(a)(7)(iii)(A).