[Code of Federal Regulations]

[Title 40, Volume 31]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR1048.305]



[Page 570-571]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 1048_CONTROL OF EMISSIONS FROM NEW, LARGE NONROAD SPARK-IGNITION 

ENGINES--Table of Contents

 

                Subpart D_Testing Production-line Engines

 

Sec.  1048.305  How must I prepare and test my production-line engines?



    (a) Test procedures. Test your production-line engines using either 

the steady-state or transient testing procedures in subpart F of this 

part to show you meet the emission standards in Sec.  1048.101(a) or 

(b), respectively. We may require you to test engines using the 

transient testing procedures to show you meet the emission standards in 

Sec.  1048.101(a).

    (b) Modifying a test engine. Once an engine is selected for testing 

(see Sec.  1048.310), you may adjust, repair, prepare, or modify it or 

check its emissions only if one of the following is true:

    (1) You document the need for doing so in your procedures for 

assembling and inspecting all your production engines and make the 

action routine for all the engines in the engine family.

    (2) This subpart otherwise specifically allows your action.

    (3) We approve your action in advance.

    (c) Engine malfunction. If an engine malfunction prevents further 

emission testing, ask us to approve your decision to either repair the 

engine or delete it from the test sequence.



[[Page 571]]



    (d) Setting adjustable parameters. Before any test, we may adjust or 

require you to adjust any adjustable parameter to any setting within its 

physically adjustable range.

    (1) We may adjust or require you to adjust idle speed outside the 

physically adjustable range as needed only until the engine has 

stabilized emission levels (see paragraph (e) of this section). We may 

ask you for information needed to establish an alternate minimum idle 

speed.

    (2) We may make or specify adjustments within the physically 

adjustable range by considering their effect on emission levels, as well 

as how likely it is someone will make such an adjustment with in-use 

engines.

    (e) Stabilizing emission levels. Before you test production-line 

engines, you may operate the engine to stabilize the emission levels. 

Using good engineering judgment, operate your engines in a way that 

represents the way production engines will be used. You may operate each 

engine for no more than the greater of two periods:

    (1) 50 hours.

    (2) The number of hours you operated your emission-data engine for 

certifying the engine family (see 40 CFR part 1065, subpart E).

    (f) Damage during shipment. If shipping an engine to a remote 

facility for production-line testing makes necessary an adjustment or 

repair, you must wait until after the initial emission test to do this 

work. We may waive this requirement if the test would be impossible or 

unsafe, or if it would permanently damage the engine. Report to us, in 

your written report under Sec.  1048.345, all adjustments or repairs you 

make on test engines before each test.

    (g) Retesting after invalid tests. You may retest an engine if you 

determine an emission test is invalid under subpart F of this part. 

Explain in your written report reasons for invalidating any test and the 

emission results from all tests. If you retest an engine and, within ten 

days after testing, ask to substitute results of the new tests for the 

original ones, we will answer within ten days after we receive your 

information.



[67 FR 68347, Nov. 8, 2002, as amended at 70 FR 40475, July 13, 2005]