On-Highway Mature Emissions

Emission regulations are becoming more stringent in every major market. Commercial vehicle customers expect increasingly cost effective and innovative solutions to enhance the performance of their vehicles or equipment. Cummins Emission Solutions is well positioned to continue developing competitive solutions and expanding our capabilities to serve customers across the globe.

 

Cummins Emission Solutions has developed technology that enables engine and vehicle systems to meet current and upcoming Environmental Protection Agency (EPA) and European (EU) emissions regulations.

 

 

EcoFit Diesel Particulate Filter Systems

 

EcoFit Diesel Particulate Filter Systems  are a proven and reliable emissions reduction technology with over 1 million systems in use since 2004.  EcoFit DPF Systems are effective at removing over 90% of  Particulate Matter (PM).  Most on-highway configurations use a combination EcoFit Diesel Oxidation Catalysts (DOC) and DPF system, using passive and active regeneration to allow more control in oxidizing and cleaning the filter. 

 

EcoFit DPF sytems 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. 

 

 

EcoFit Selective Catalytic Reduction Systems

 

Nearly 1 million EcoFit Selective Catalytic Reduction Systems and complementary components have been in use worldwide since 2005.  EcoFit SCR Systems are an effective and reliable technology that reduces oxides of nitrogen (NOx) emissions for a broad range of on-highway applications and enables enhanced fuel economy.  Our systems require little to no maintenance with occasional dosing system filter maintenance depending on the application.

 

EcoFit SCR 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.

 

The EcoFit SCR Systems are comprised of three main elements: SCR catalyst, Urea Dosing System and the Aftertreatment Control System. 

 

 

Natural Gas Three-Way Catalyst

 

The Three-Way Catalyst is an efficient way to manage emissions, such as oxides of nitrogen (NOx), carbon monoxide, hydrocarbons and volative organic compounds, from rich-burn natural gas engines while providing optimal performance.  This solution requires no cleaning or maintenance.

 

Utilizing a flow-through substrate coated with a precious metal catalyst, the chemical oxidation process turns engine out emissions into harmless nitrogen, carbon dioxide and water vapor as they pass through the three-way catalyst.

 

NOx Adsorber

 

The NOx Adsorber Catalyst is a reliable solution that uses a combination of base metal oxide and precious metal coatings to effectively control oxides of nitrogen (NOx) emissions.  This solution requires no cleaning or maintenance.

 

The base metal component (for example, barium oxide) reacts with NOx to form barium nitrate – effectively storing the NOx on the surface of the catalyst.  When the available storage sites are occupied, the catalyst is operated briefly under “rich” exhaust gas conditions (i.e., the air-to-fuel ratio is adjusted to eliminate oxygen in the exhaust).  This releases the NOx from the base metal storage sites and allows it to be converted over the precious metal components to nitrogen gas and water vapor.

 

Click the image below to view our video featuring CES On-Highway Euro VI & EPA 13 emission solutions.