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Cummins Tier 4 Interim Engines
February 7th, 2011
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Company: Cummins Inc
Cummins Inc.’s 6-cylinder QSB6.7, QSL9, QSX11.9 and QSX15 engines meet EPA Tier 4 Interim/EU Stage IIIB regulations for above 173 hp (129 kW). They are integrated with the Cummins Particulate Filter aftertreatment system to remove Particulate Matter (PM) emissions by operating with up to 99 percent passive regeneration in most applications, with no impact on equipment performance. For the Jan.1, 2012, Tier 4 Interim/Stage IIIB emissions regulations covering the 75-hp to 173-hp (56-129 kW) category, the 4-cylinder QSB3.3, QSB4.5 and lower ratings of the QSB6.7 utilize the Cummins Compact Catalyst to remove PM. The catalyst is a fully passive, exhaust flow-through aftertreatment with a service-free “fit-and-forget” advantage for smaller equipment typically used in rental fleet applications.
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