Tier 4

  • Clean Diesel Powers the World

    A new generation of Tier 4 clean diesel power has emerged, ready to meet the needs of a sustainable future. Diesel power is the workhorse of the global economy. Commercial trucks, freight locomotives and container ships move a vast variety of goods from around the world to local store shelves. Feeding the world is made possible by more powerful and efficient farm tractors and machines, almost all diesel-powered. Ref: DieselTechForum

  • Cummins Tier 4 Solutions for Off-Road Engines and Equipment

    Jennifer Rumsey, the Vice President of Engineering for Cummins Engine Business, explains how Cummins developed its clean diesel engine technology through the Tier 4 Interim and Tier 4 Final stages to develop near zero emissions products. This included adding new components like a common rail high pressure fuel system for particulate control, exhaust gas recirculation, a variable-geometry turbocharger, a particulate filter, and the Selective Catalytic Reduction. Learn more at