[Code of Federal Regulations]
[Title 40, Volume 30]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR1065.501]

[Page 666-667]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 1065_TEST PROCEDURES AND EQUIPMENT--Table of Contents
 
                   Subpart F_Running an Emission Test
 
Sec. 1065.501  Overview of the engine dynamometer test procedures.


    (a) The engine dynamometer test procedure measures brake-specific 
emissions of hydrocarbons (total and nonmethane, as applicable), carbon 
monoxide, and oxides of nitrogen. To perform this test procedure, you 
first dilute exhaust emissions with ambient air and collect a continuous 
proportional sample for analysis, then analyze the composite samples 
(either in bags after the test or continuously during the test). The 
general test procedure consists of a test cycle made of one or more 
segments (check the standard-setting part for specific cycles):
    (1) Either a cold-start cycle (where you measure emissions) or a 
warm-up cycle (where you do not measure emissions).
    (2) A hot-start transient test (some test cycles may omit engine 
starting from the ``hot-start'' cycle).
    (3) A steady-state test.
    (b) Measure power using the dynamometer's feedback signals for 
torque and speed. The power measurement produces a brake kilowatt-hour 
value that allows you to calculate brake-specific emissions (see Subpart 
G of this part).
    (c) Prepare engines for testing consistent with Sec. 1065.10(c)(1) 
and according to the following provisions:
    (1) When you test an engine or operate it for service accumulation, 
use the complete engine with all emission-control devices installed and 
functioning.
    (2) Install the fan for any air-cooled engine (if applicable).
    (3) You may install accessories such as an oil cooler, alternators, 
and air compressors or simulate their loading if they are typical of in-
use operation. Apply this loading during all testing operations, 
including mapping.
    (4) You may install a production-type starter on the engine.
    (5) Cool the engine in a way that will maintain its operating 
temperatures including the intake air, oil, water temperatures about the 
same as they would be during normal operation. You may use auxiliary 
fans if necessary. You may use rust inhibitors and lubrication 
additives, up to the levels that the additive manufacturer recommends. 
You may also use antifreeze mixtures and other coolants typical of those 
approved for use by the manufacturer.
    (6) Use representative exhaust and air-intake systems. Make sure the 
exhaust restriction is 80 to 100 percent of the recommended maximum 
specified exhaust restriction and the air inlet restriction is between 
that of a clean filter and the maximum restriction specification. As the 
manufacturer, you are liable for emission compliance from the minimum 
in-use restrictions to the

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maximum restrictions you specify for that particular engine.