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National Clean Diesel Campaign (NCDC)

Working Together for Cleaner Air

Cummins Emission Solutions Retrofit Technologies

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Cummins Emission Solutions & Cummins Filtration Diesel Oxidation Catalyst (DOC) and Closed Crankcase Ventilation (CCV) System
Verification Letter (PDF) (2 pp, 110K, November 2007)
Technology Engine
Model/Application
Retrofit Fuel, Max Sulfur (ppm) Reductions (%) †
PMa NOx HC CO
Cummins Emission Solutions & Cummins Filtration Diesel Oxidation Catalyst (DOC) and Closed Crankcase Ventilation (CCV) System
Environmental Technology Verification Logo
Highway, heavy-heavy and medium-heavy duty, 4 cycle, non-EGR, model year 1991 - 2003, turbocharged or naturally aspirated engines 15 30 n/a 74 50

† - Baseline assumes an unmodified engine running on diesel fuel of less than 15 ppm sulfur fuel.
a - Total PM reduction figures reflect reductions from both tailpipe and crankcase emissions.

The following operating criteria must be met in order for appropriately retrofitted engines to achieve the above emissions reductions:

  1. The engine should be well maintained and not consume lubricating oil at a rate greater than that specified by the engine manufacturer.
  2. The engine must be operated with a fuel that contains a sulfur content of no more than 15 ppm.
  3. The engine exhaust temperature must be at least 150 degrees C during the duty cycle.
  4. The closed crankcase ventilation system filter cartridges must be replaced every year or 1000 engine hours, whichever occurs first.

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