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§ 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.
(2) NOX standards apply based on the engine's model year and maximum in-use engine speed as shown in the following table:
Table 1 to § 1042.104—NOX Emission Standards for Category 3 Engines
[g/kW-hr]
| Emission standards | Model year | Maximum in-use engine speed | ||
|---|---|---|---|---|
| Less than 130 RPM | 130–2000 RPM a | Over 2000 RPM | ||
| Tier 1 | 2004–2010 | 17.0 | 45.0·n(−0.20) | 9.8 |
| Tier 2 | 2011–2015 | 14.4 | 44.0·n(−0.23) | 7.7 |
| Tier 3 b | 2016 and later | 3.4 | 9.0·n(−0.20) | 2.0 |