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Perkins unveils new Tier 4/Stage IV engine models

19 April 2012

At the Intermat 2012 show in Paris, Perkins is showcasing a number of new nonroad engines compliant with the new US and EU emission standards that come into force in 2012/14. New engine models will be launched in three Perkins engine series:

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1200 Series 6-cylinder. Top of the range is the new, twin turbo, 7 liter, DI, 1206F-E70TTA unit, capable of producing 225 kW and 1,280 Nm of torque at 1,400 rpm. It features twin turbochargers—one small, one large—mounted in series. The smaller first stage turbo provides quick low speed response, while the larger second stage provides the high airflow required at high engine speeds. Another new 6-cylinder model is the single turbo, 1206F-E70TA that offers up to 151 kW with maximum torque of 870 Nm at 1,400 rpm. Both models use high pressure loop exhaust gas recirculation (EGR).

To comply with the Tier 4/Stage IV emissions, both 6-cylinder engines use an aftertreatment system that includes a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF) and selective catalytic reduction (SCR). The DOC/DPF canister and the SCR system are packaged into one integrated module (CEM—Clean Emissions Module), which can be positioned remotely in a machine chassis or directly on top of the engine.

The DPF uses a wall-flow filter and facilitates a passive regeneration system. The aftertreatment system is designed to be maintenance-free (minimum 8,000 hours). The combined consumption of fuel and urea is about 5% lower compared to fuel consumption in the non-SCR models.

1200 Series 4-cylinder. The 1204F, 4.4 liter, 4-cylinder, IDI, Tier 4/Stage IV engine is offered in a choice of two versions. The single turbo aftercooled 1204F-E44TA, produces 110k W (147 hp), while the twin turbo, aftercooled model—the 1204F-E44TTA—has powers up to 130 kW (175 hp) and employs twin turbochargers mounted in series, for extra power density, low speed torque and faster transient response.

Both 1204F models meet Tier 4/Stage IV emission standards using DOC/SCR aftertreatment, without a DPF. The DOC/SCR module can be mounted in a variety of remote locations, freeing up space in the engine bay, especially in more compact equipment. Perkins also offers the option of a service-free DPF unit to meet specific OEM requirements.

Source: Perkins