U.S. Emissions

New emissions standards for standby and prime spark–ignited generator sets

• U.S. EPA standards for stationary non–emergency prime spark–ignited generator sets went into effect on July 1, 2008.
• The effective date for stationary emergency standby units was January 1, 2009.
• EPA definition of "emergency standby" is an internal combustion engine whose operation is limited to emergency situations and up to 100 hours a year for required testing and maintenance.
• "Non–emergency prime" refers to internal combustion engines used for any other means than emergency, such as peak–shaving.
• The overarching term "stationary" refers to internal combustion engines that stay at each site for 12 months or longer.

U.S. EPA stationary spark–ignited emissions regulations schedule

Standby Power

kWe, 60 Hz	kW    (HP)	2008	2009	2010	2011	2012
15-75 NG	19-97    (25-130)		(13.4)/519 Part 90 V
80-150 NG	97-179    (130-240)		(2.7)/4.4 Part 1048¹ V or		2.0/4.0/1.0 Part 60 V
15-75 LP	19-97    (25-130)		(13.4)/519 Part 90 M
80-150 LP	97-179    (130-240)		(2.7)/4.4 Part 1048¹ M

Prime Power

kWe, 60 Hz	kW    (HP)	2008	2009	2010	2011	2012
15-50 NG	19-75    (25-100)		2.0/4.0/1.0 Part 60 V or (2.7)/4.4 Part 1048¹ V		(2.7)/4.4 Part 1048¹ V
60-150 NG	75-179    (100-240)		2.0/4.0/1.0 Part 60 V or (2.7)/4.4 Part 1048¹ V		1.0/2.0/0.70 Part 60 V
15-150 LP	19-179    (25-240)		(2.7)/4.4 Part 1048¹ M

Non-Regulated

Interim

Final

Notes:

• NOx/HC/CO/PM (g/kW-hr)
• (NOx + HC)/CO/PM(g/kW-hr)
• Separate NOX and HC standards separated by a "/". Combined NOX and HC standards denoted in parenthesis "()"
• [Conversion: (g/kW-hr)x0.7457 = g/bhp-hr]

• M: Manufacturer Certification Required
• V: Manufacturer Voluntary Certification or EndUser Mandatory Certification
• ¹ Alternately can use emissions limit formula: (NOx + NMHC)x CO >= 8.57 rounded to the nearest 0.1g/kW-hr
• You may not select an HC+ND emission standard higher than 2.7 g/kW-hr or a CO emission standard higher than 20.6 g/kW-hr

On July 11, 2005, the U.S. EPA proposed emission standards that apply to stationary diesel generator sets. Beginning January 1, 2007, EPA requirements for stationary and Nonroad (mobile off highway) diesel generator sets were harmonized.

Cummins Power Generation has been in the forefront of the move to cleaner, quieter and more efficient diesel–engine–powered generator sets in compliance with these new requirements. Our investment in and commitment to developing cleaner, quieter and more efficient diesel engines for Nonroad and stationary engines used in generator sets has achieved impressive results.

• Cummins Power Generation was the first manufacturer to introduce Environmental Protection Agency (EPA) Tier 2 and Tier 3 generator sets to the market — ahead of the regulatory deadline.
• Cummins Power Generation is a recognized leader in new technologies that reduce engine emissions. Our innovative Cummins Quantum engine technology system focuses on in–cylinder design improvements that eliminate pollutants before they are formed.

As a result of this effort to reduce exhaust emissions worldwide, Cummins Power Generation diesel engine generators are not only very clean, but also retain all of their performance advantages without exhaust aftertreatment strategies that add cost and complicate maintenance for end users.

U.S. EPA Nonroad and stationary diesel emissions regulations schedule

Beginning January 1, 2007 all stationary and Nonroad regulations have been harmonized. Stationary Emergency generators only have to comply with Tier 3 requirements and are exempt from Tier 4 Interim and Tier 4 Final regulations that require aftertreatment.

Engine Horse Power	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017
(0 - 24)	( 7.5 ) / 6.6 / 0.40
(25 - 48)	( 7.5 ) / 5.5 / 0.30					( 4.7 ) / 5.0 / 0.03
						( 7.5 ) / 5.5 / 0.30 Stationary Emergency
(49 - 74)	( 4.7 ) / 5.0 / 0.40				( 4.7 ) / 5.0 / 0.03
					( 4.7 ) / 5.0 / 0.40 Stationary Emergency
(75 - 99)	( 4.7 ) / 5.0 / 0.40				3.4/0.19/5.0/0.02			0.40 / 0.19 / 5.0 / 0.02
					( 4.7 ) / 5.0 / 0.40 Stationary Emergency
(100 - 173)	( 4.0 ) / 5.0 / 0.30				3.4/0.19/5.0/0.02			0.40 / 0.19 / 5.0 / 0.02
					( 4.0 ) / 5.0 / 0.30 Stationary Emergency
(174 - 751)	( 4.0 ) / 3.5 / 0.20			2.0/0.19/5.0/0.02			0.40 / 0.19 / 5.0 / 0.02
				( 4.0 ) / 3.5 / 0.20 Stationary Emergency
(752 - 1207)	( 6.4 ) / 3.5 / 0.20			3.5 / 0.40 / 3.5 / 0.10				0.67/ 0.19/ 3.5/ 0.03
				( 6.4 ) / 3.5 / 0.20 Stationary Emergency
(1208 - 3000)	( 6.4 ) / 3.5 / 0.20			0.67 / 0.40 / 3.5 / 0.10				0.67/ 0.19/ 3.5/ 0.03
				( 6.4 ) / 3.5 / 0.20 Stationary Emergency
(>3000)	9.2 / 1.3 / 11.4 / 0.54			0.67 / 0.40 / 3.5 / 0.10				0.67/ 0.19/ 3.5/ 0.03
				( 6.4 ) / 3.5 / 0.20 Stationary Emergency

Tier 1

Tier 2

Tier 3

Tier 4 Interim

Tier 4 Final

Notes:

• NOx/HC/CO/PM (g/kW-hr)
• (NOx + HC)/CO/PM(g/kW-hr)
• Separate NOX and HC standards separated by a "/". Combined NOX and HC standards denoted in parenthesis "()"
• [Conversion: (g/kW-hr)x0.7457 = g/bhp-hr]

1. All standards are based upon ISO 8178 C1 8–mode test for variable–speed engines and D2 5–mode test for constant–speed engines. Transient test required beginning in 2011 for Tier 4 and Stage IIIB.
2. U.S. smoke requirements: On–highway federal test procedure.
3. For U.S. Tier 4, "Split–family" standards are shown above for 56 – 560kW. Optional "Phase–in" and "Phase–out" standards for NOx are permitted by EPA.
4. For U.S.Tier 4, optional 0.30 g/kW-hr PM standard for engines 37-55kW in 2008. Selecting this option allows a 1 year delay of Tier 4 Final implementation