Cummins introduces new Tier 4 Final QSF3.8 and QSM12 engines

Niels Tholen - 22 April 2013

Cummins unveiled its new  QSF3.8 and  QSM12 engines last week at the Bauma show in Munich, Germany. The QSF3.8, 3.8 liter, four-cylinder engine has an output extending from 85-132 hp. While the heavier QSM12, 12 liter, six-cylinder engine has an output of up to 512 hp. Both engines meet U.S. Tier 4 Final emission regulations.

The QSF3.8 is equipped with cooled Exhaust Gas Recirculation (EGR) and Selective Catalytic Reduction (SCR) technology, without the need for a Diesel Particulate Filter (DPF). Cummins' QSF3.8 relates to the Tier 4 Interim QSB3.3 but has a larger displacement. While equivalent in size, weight and fuel economy, the new engine meets the required Tier 4 Final legislation.

The QSM12 engine comes equipped with SCR and a DPF but without Exhaust Gas Recirculation (EGR) as in earlier Tier 4 Final engines. This frees up power potential and reduces heat rejection by 40% compared to the EGR cooled engines, according to the company.

Hugh Foden, Executive Director at Cummins Off-Highway Business, said: "The new QSF3.8 will take compact equipment forward to Tier 4 Final standards with more power, more economy and more durability." About the new QSM12 engine he was quoted: "For Tier 4 Final, the QSM 12 sets a new benchmark for heavy-duty engines with its ability to outperform any comparable engine, yet provides a smaller, lighter and simpler engine package to install."

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