Seven months into the production of its EPA 2010 certified and compliant engines, Cummins announced it has built and shipped more than 20,000 heavy-duty and mid-range engines with Selective Catalytic Reduction (SCR) exhaust aftertreatment, with the number expected to hit 26,000 by the end of August.

These engines are delivering on the company's promises of better fuel economy, better reliability and better performance, according to the company.

"The fact that SCR is the right technology is being proven in the marketplace every day with our industry-leading engines," said Rich Freeland, president, engine business. "To date, the reliability data show that this has been our best launch ever. Our 2010 products are delivering up to 6 percent better fuel economy and lower CO2 emissions, and they are meeting the near-zero emissions levels required by EPA 2010 standards."

Cummins has developed and certified 13 engine families to the EPA and California Air Resources Board regulations to serve more than 60 OEM customers in 180 vehicle installations.

The ISX15 Family 1 engines feature On-Board Diagnostics (OBD) with improved emissions control warnings and alerts to the vehicle operator. OBD will be required by the EPA and will be featured on all engine families beginning in 2013.