Tier 4 Interim, Tier 4 Final and beyond

Stage IIIA/B, Stage IV and beyond

In a market where advanced emissions regulations are now becoming a reality, Cummins Emission Solutions understands that equipment operators need aftertreatment solutions that require minimal space claim and keep the cost of ownership low.  Leveraging our broad experience in other emissionized markets, our Tier 4 product offerings do just that.  From our compact diesel oxidation catalysts to our selective catalytic reduction (SCR) systems, Cummins Emission Solutions has what you need to keep you compliant.


Diesel Oxidation Catalysts

Diesel oxidation catalysts reduce Particulate Matter (PM) through a chemical reaction that requires no cleaning or maintenance.  In production since the early 1990’s, DOCs have been customized for the challenging demands of off-highway equipment and unique space constraints.

A DOC consists of a catalytic coating on a cordierite or metallic substrate for oxidizing exhaust PM. It operates in a passive-only mode that requires no active regeneration or special duty cycle requirements.

Diesel Particulate Filters 

Diesel particulate filters are a proven and reliable emissions reduction technology with over 1 million Cummins Emission Solutions DPFs in use since 2004. DPFs are effective at removing over 90% of Particulate Matter (PM).  Combination systems are designed for rugged off-highway markets and to fit tight space constraints. The use of passive and active regeneration also allows more control in oxidizing and cleaning the filter.

DPFs, combined with DOCs, use wall-flow substrates typically made of porous ceramic media that capture exhaust gas and remove PM or soot particles. A typical filter consists of an array of small channels for exhaust gas to flow.  Adjacent channels are plugged at opposite ends, forcing the exhaust gas to flow through the porous wall, capturing the soot particles on the surface and inside pores of the media.  As soot accumulates in the filter, a regeneration event will provide sufficient heat to oxidize and capture the soot.  The remaining ash can be removed during regularly scheduled cleaning events based on the recommendations of the engine manufacturer. 

Selective Catalytic Reduction Systems

Nearly 1 million selective catalytic reduction (SCR) ystems and complementary components have been in use worldwide since 2005.  SCR systems are an effective and reliable technology that reduces oxides of nitrogen (NOx) emissions for a broad range of off-highway applications and enables enhanced fuel economy.  Ideal for off-highway equipment, SCR systems are virtually maintenance-free with occasional dosing system filter maintenance depending on the application.

An SCR system is comprised of three main elements: SCR catalyst, urea dosing system and the aftertreatment control system.  Our systems use a chemical reductant, in this case urea, which is called Diesel Exhaust Fluid (DEF) in North American or AdBlue in Europe.  DEF or AdBlue converts to ammonia in the exhaust stream and reacts with NOx over a catalyst to form harmless nitrogen gas and water.


System Integration

Optimizing your equipment for easy installation, lowest cost of operation and durability while still meeting increasing global emissions requirements, is not easy. Cummins Emission Solutions track record brings technology expertise, systems knowledge and unrivalled reliability, a unique advantage in being a complete integrator of critical emission sub-systems. We understand new emissions requirements and a vast array of equipment and engine applications. You can leave the system integration to us - and manage your engineering costs more effectively.

Our System Engineering Solutions include:

  • System integration and modeling
  • Regeneration and thermal management solutions
  • Emissions compliance testing
  • Engine control module (ECM) tuning and licensing
  • Catalyst development, including substrates and coatings
  • Global prototyping