Cummins displayed its ISX11.9 and aftertreatment system, featuring Selective Catalytic Reduction (SCR), at the United Motorcoach Association (UMA) Expo in Tampa, Fla. last week.

Cummins ISX11.9 and ISL9 engines provide a power range that is well suited for motorcoach applications and are certified to meet Environmental Protection Agency (EPA) and California Air Resources Board (ARB) 2010 emissions regulations, while delivering better performance and better reliability.

Cummins is the only engine manufacturer to design, develop, manufacture and support every component from the air intake to the exhaust aftertreatment in a totally integrated solution, including SCR aftertreatment technology, to meet the near-zero emissions standards, the company said.

The ISX11.9 builds upon the legacy of strength and performance of the Cummins ISM engine and the proven technology of the ISX15. The 11.9-liter engine offers optimal horsepower and torque to handle the performance demands of luxury motorcoaches.

Cummins ISL9 leverages the experience of the proven ISL engine and includes few changes to the base engine to meet EPA 2010 emission regulations. The power output of the ISL9 is an excellent match for the specific needs of commuter/transit coaches, with up to 380 hp and 1300 lb-ft of torque, according to Cummins.

The ISX11.9 and ISL9 incorporate cooled Exhaust Gas Recirculation (EGR), a single VGT Turbocharger, a common Electronic Control Module (ECM) and the Cummins aftertreatment system with SCR, as well as the XPI fuel system.

Since full production of engines commenced in January 2010, Cummins has produced and shipped over 62,000 EPA 2010-certified engines from its manufacturing facilities in Jamestown, N.Y.; Rocky Mount, N.C.; and Columbus, Ind., through the end of December 2010.