(a) This subpart specifies the equipment and procedures for performing exhaust-emission tests on Otto-cycle and diesel-cycle heavy-duty engines. Subpart A of this part sets forth the emission standards and general testing requirements to comply with EPA certification procedures.
(b) Use the applicable equipment and procedures for spark-ignition or compression-ignition engines in 40 CFR part 1065 to determine whether engines meet the duty-cycle emission standards in subpart A of this part. Measure the emissions of all regulated pollutants as specified in 40 CFR part 1065. Use the duty cycles and procedures specified in §§ 86.1333-2010, 86.1360-2007, and 86.1362-2007. Adjust emission results from engines using aftertreatment technology with infrequent regeneration events as described in § 86.004-28.
(c) The provisions in §§ 86.1370-2007 and §§ 86.1372-2007 apply for determining whether an engine meets the applicable not-to-exceed emission standards.
(d) Measure smoke using the procedures in subpart I of this part for evaluating whether engines meet the smoke standards in subpart A of this part.
(e) Use the fuels specified in 40 CFR part 1065 to perform valid tests, as follows:
(1) For service accumulation, use the test fuel or any commercially available fuel that is representative of the fuel that in-use engines will use.
(2) For diesel-fueled engines, use the ultra low-sulfur diesel fuel specified in 40 CFR part 1065 for emission testing.
(f) You may use special or alternate procedures to the extent we allow them under 40 CFR 1065.10.
(g) This subpart applies to you as a manufacturer, and to anyone who does testing for you.
(h) This paragraph (h) describes how testing performed prior to July 1, 2010 may be conducted using the test procedures of this subpart N rather than the corresponding provisions of 40 CFR part 1065 otherwise required by this section. You must use good engineering judgment when testing under this paragraph (h), and must comply with the following provisions of 40 CFR part 1065 :
(1) Generate a map of your engine according to 40 CFR 1065.510(b)(5)(ii) and generate test cycles according to 40 CFR 1065.610. Validate your cycle according to 40 CFR 1065.514.
(2) Follow the provisions of 40 CFR 1065.342 to verify the performance of any sample dryers in your system. Correct your measurements according to 40 CFR 1065.659, except use the value of Kw in § 86.1342-90(i) as the value of (1−xH2Oexh) in Equation 1065.659-1.
(3) Verify your NO2 -to-NO converter according to 40 CFR 1065.378.
(4) For diesel engine testing, correct NOX emissions for intake-air humidity according to 40 CFR 1065.670.
(5) You must comply with the provisions related to analyzer range and drift in 40 CFR 1065.550. If drift correction is required, correct your measurements according to 40 CFR 1065.672, but use the emission calculations specified in this subpart N rather than those specified in 40 CFR 1065.650.
(7) Follow the provisions of 40 CFR 1065.370 to verify the performance of your CLD analyzer with respect to CO2 and H2 O quench. You are not required to follow 40 CFR 1065.145(d)(2), 1065.248, or 1065.750, which are referenced in 40 CFR 1065.370.
[70 FR 40438, July 13, 2005, as amended at 73 FR 37192, June 30, 2008; 73 FR 59178, Oct. 8, 2008; 75 FR 22981, Apr. 30, 2010]
Title 40 published on 2012-07-01
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