New Cummins Power Generation engines use Selective Catalytic Reduction (SCR) to meet Tier 4 emissions regulations

Rebecca Hayward - 5 December 2013

Cummins Power Generation is launching two new diesel G-drive engines that are certified to meet EPA Tier 4 Final emissions regulations for particulate matter (PM) and nitrogen oxides (NOx). The first Tier 4 Final G-drive engines, available in Q2 2014, will be the QSB7 and QSL9.

Instead of using a Diesel Particulate Filter (DPF), the new engines use a combination of in-cylinder combustion improvements including Selective Catalytic Reduction (SCR) and Exhaust Gas Recirculation (EGR) to remove PM and NOx.

George Larca, Regional Manager at Cummins Power Generation said: 'By eliminating the need for DPF, these engines offer reduced maintenance and 4 percent better fuel efficiency than the previous Tier 3 engines'.

The Tier 4 Final G-drive engine packages will include diesel exhaust fluid (DEF) dosing and supply modules that control the dispensing of DEF into the SCR to cut emissions of NOx.

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