§ 1042.104 - Exhaust emission standards for Category 3 engines.
(a) Duty-cycle standards. Exhaust emissions from your engines may not exceed emission standards, as follows:
(1) Measure emissions using the test procedures described in subpart F of this part. Note that while no PM standards apply for Category 3 engines, PM emissions must be measured for certification testing and reported under § 1042.205. Note also that you are not required to measure PM emissions for other testing.
Table 1 to § 1042.104 - NO
|Emission standards||Model year||Maximum in-use engine speed|
|Less than 130 RPM||130-2000 RPM a||Over 2000 RPM|
|Tier 3 b||2016 and later||3.4||9.0·n||2.0|
a Applicable standards are calculated from n (maximum in-use engine speed, in RPM, as specified in § 1042.140). Round the standards to one decimal place.
b For engines designed with on-off controls as specified in § 1042.115(g), the Tier 2 standards continue to apply any time the engine has disabled its Tier 3 NO
(3) The HC standard for Tier 2 and later engines is 2.0 g/kW-hr. This standard applies as follows:
(i) Alcohol-fueled engines must comply with HC standards based on THCE emissions.
(ii) Natural gas-fueled engines must comply with HC standards based on NMHC emissions.
(iii) Diesel-fueled and all other engines not described in paragraph (a)(3)(i) or (ii) of this section must comply with HC standards based on THC emissions.
(4) The CO standard for Tier 2 and later engines is 5.0 g/kW-hr.
(b) Averaging, banking, and trading. Category 3 engines are not eligible for participation in the averaging, banking, and trading (ABT) program as described in subpart H of this part.
(c) Mode caps. Measured NO
(d) Useful life. Your engines must meet the exhaust emission standards of this section over their full useful life, expressed as a period in years or hours of engine operation, whichever comes first.
(1) The minimum useful life value is 3 years or 10,000 hours of operation.
(2) Specify a longer useful life in hours for an engine family under either of two conditions:
(i) If you design, advertise, or market your engine to operate longer than the minimum useful life (your recommended hours until rebuild indicates a longer design life).
(ii) If your basic mechanical warranty is longer than the minimum useful life.
(e) Applicability for testing. The duty-cycle emission standards in this section apply to all testing performed according to the procedures in § 1042.505, including certification, production-line, and in-use testing. See paragraph (g) of this section for standards that apply for certain other test procedures, such as some production-line testing.
(f) Domestic engines. Engines installed on vessels excluded from 40 CFR part 1043 because they operate only domestically may not be certified for use with residual fuels.
(g) Alternate installed-engine standards. NO