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 RPMa | 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 3b | 2016 and later | 3.4 | 9.0·n(-0.20) | 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 NOX emission controls.
40 C.F.R. §1042.104