[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: 40CFR92.124]

[Page 456-457]
 
                   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. 92.124  Test sequence; general requirements.

    (a) Air temperature. (1) The temperature of dilution air for the 
particulate sample dilution tunnel shall comply with the requirements of 
Sec. 92.114 throughout the test sequence.
    (2) For the testing of locomotives and engines, the ambient (test 
cell or out-of-door) air temperature, the temperature of the engine 
intake air, and the temperature of the air which provides cooling for 
the engine charge air cooling system shall be between 45  deg.F (7 
deg.C) and 105  deg.F (41  deg.C) throughout the test sequence. 
Manufacturers and remanufacturers may test at higher temperatures 
without approval from the Administrator, but no corrections are allowed 
for the deviations from test conditions.
    (b) For the testing of locomotives and engines, the atmospheric 
pressure shall be between 31.0 inches Hg and 26.0 inches Hg throughout 
the test sequence. Manufacturers and remanufacturers may test at lower 
pressures without approval from the Administrator, but no corrections 
are allowed for the deviations from test conditions.
    (c) No control of humidity is required for ambient air, engine 
intake air or dilution air.
    (d) Flow restrictions--(1) Locomotive testing. Restrictions to the 
flow of air into the engine and of exhaust out of the engine shall be 
those inherent to the locomotive. No adjustments or changes shall be 
made to these parameters. The temperature of the inlet fuel to the 
engine shall not exceed 125  deg.F.
    (2) Engine testing. (i) Air inlet and exhaust restrictions shall be 
set to represent the average restrictions which would be seen in use in 
a representative application.
    (ii) Inlet depression and exhaust backpressure shall be set with the 
engine operating at rated speed and maximum power, i.e., throttle notch 
8.
    (iii) The locations at which the inlet depression and exhaust 
backpressure are measured shall be specified by the manufacturer or 
remanufacturer.
    (iv) The settings shall be made during the preconditioning.
    (e) Pre-test engine measurements (e.g., idle and throttle notch 
speeds, fuel flows, etc.), pre-test engine performance checks (e.g., 
verification of engine power, etc.) and pre-test system calibrations 
(e.g., inlet and exhaust restrictions, etc.) can be done during engine 
preconditioning, or at the manufacturer's convenience subject to the 
requirements of good engineering practice.
    (f) The required test sequence is described in Table B124-1 of this 
section, as follows:

[[Page 457]]



                       Table B124-1--Test Sequence for Locomotives and Locomotive Engines
----------------------------------------------------------------------------------------------------------------
                                                                                                Power, and fuel
           Mode No.               Notch setting      Time in notch    Emissions measured \2\      consumption
                                                                                                   measured
----------------------------------------------------------------------------------------------------------------
Warmup........................  Notch 8..........  5  1   None..................  None.
                                                    min.
Warmup........................  Lowest Idle......  15 min maximum...  None..................  None.
1a............................  Low Idle \1\.....  6 min minimum....  All...................  Both.
1.............................  Normal Idle......  6 min minimum....  All...................  Both.
2.............................  Dynamic Brake \1\  6 min minimum....  All...................  Both.
3.............................  Notch 1..........  6 min minimum....  All...................  Both.
4.............................  Notch 2..........  6 min minimum....  All...................  Both.
5.............................  Notch 3..........  6 min minimum....  All...................  Both.
6.............................  Notch 4..........  6 min minimum....  All...................  Both.
7.............................  Notch 5..........  6 min minimum....  All...................  Both.
8.............................  Notch 6..........  6 min minimum....  All...................  Both.
9.............................  Notch 7..........  6 min minimum....  All...................  Both.
10............................  Notch 8..........  15 min minimum...  All...................  Both.
----------------------------------------------------------------------------------------------------------------
\1\ Omit if not so equipped.
\2\ The EPA test sequence for locomotives and locomotive engines may be performed once, with gaseous,
  particulate and smoke measurements performed simultaneously, or it may be performed twice with gaseous, and
  particulate measurements performed during one test sequence and smoke measurements performed during the other
  test sequence.