About Cummins Emission Solutions (CES)

Cummins develops industry-leading aftertreatment technology designed to meet our customers’ needs for performance and reliability, while optimizing fuel economy and cost savings.

Learn more about Cummins Emission Solutions

How an Aftertreatment works

An aftertreatment system is a method or device for reducing harmful exhaust emissions from internal-combustion engines to ensure the engines meet emission regulations.

Find out how an aftertreatment system works 

Core Technologies 

Cummins’ leading aftertreatment technologies are designed around our proven core technologies. Building on thousands of hours of real-world experience and expertise of oxidation catalysts, particulate filters and SCR technology, our aftertreatment systems help optimize your entire engine system to operate more efficiently.

Learn more about our Core Technologies

Product Segments

Cummins helps customers meet tomorrow's emissions standards today with innovative, flexible and integrated technology for light- medium-, heavy-duty and high-horsepower commercial on- and off-highway engine markets.


  • Heavy-Duty Truck
  • Medium-Duty Truck & Bus


  • Construction
  • Agriculture
  • Mining

Off-Highway > 750hp

  • Industrial
  • Marine
  • Rail
  • Oil & Gas

Aftertreatment Innovation

At Cummins, our continuous improvement process demands that we look for new and innovative ways to make engines run cleaner, stronger and longer. Our continued commitment to meeting the highest standards and our innovative technologies set us apart from the competition.

Find out more about our future technologies

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