Cummins Announces Production of Tier 4 Interim Engines

Cummins Inc., Columbus, Ind., has announced the production and supply of the first Environmental Protection Agency Tier 4 Interim and European Union Stage III B certified engines and aftertreatment for early installation by off-highway equipment customers.

The new emissions regulations take effect January 1, 2011, for engines over 173 hp (129 kW), with particulate matter reduced by 90 percent and nitrogen oxides by almost 50 percent compared with the current Tier 3 and Stage III A standard.

The QSB6.7 engine is certified to a higher power output of 300 hp (224 kW), while the QSL9 engine increases output up to 400 hp (298 kW). The 6.7-liter and the 9-liter engines have received EPA and EU emissions certification as integral systems with a particulate filter exhaust aftertreatment. The engines achieve up to 5 percent improved fuel efficiency and faster engine response, boosting machine productivity.

"Although much of the Tier 4 emissions technology is new to the off-highway industry, it is not new to Cummins,” said Hugh Foden, executive director of Cummins off-highway business. “Key enablers, such as the Cummins particulate filter aftertreatment, exhaust gas recirculation and variable geometry turbochargers were available from within Cummins own technology portfolio and successfully used with our EPA 2007 on-highway engines."

The 6.7-liter and 9-liter engines are among the most widely used in the off-highway industry within their power range. More than 30 power ratings will be available for Tier 4 Interim and Stage III B applications, with a wide range of installation configurations applicable to all types of construction, agricultural and industrial equipment. In addition to approval by the EPA and EU, the QSB6.7 and QSL9 engines have also received California Air Resources Board certification to enable 50-state compliance.