A range of six and four cylinder EU Stage IV/U.S. EPA Tier 4 Final diesel engines which deliver the performance and productivity required by Original Equipment Manufacturers (OEMs) and end users were on show at bauma 2013.
For OEMs wanting a lot of torque at low speed, the single turbo Perkins 1206F-E70TA is a seven liter, six cylinder unit capable of producing up to 151 kW (202 hp) at 2,200 rpm with maximum torque of 870 Nm at 1,400 rpm.
The six cylinder range also includes the twin turbo 1206F-E70TTA, which delivers 225 kW (300 hp), giving OEMs who may previously have chosen a larger engine, the choice of the same power from a smaller engine package. It features twin turbochargers – one small, one large - mounted in series.
In developing the new range Perkins has sought to minimize the impact of the aftertreatment required to meet Stage IV/Tier 4 Final requirements, in particular the significant reduction in NOx. Perkins has achieved this through packaging the Diesel Oxidation Catalyst (DOC)/Diesel Particulate Filter (DPF) canister and the Selective Catalytic Reduction (SCR) system into one integrated module, which can be positioned remotely in a machine chassis or directly on top of the engine.
The lightweight yet compact dimensioned aftertreatment module minimizes space claim in the engine bay and incorporates a number of features to ease installation. These include flexible inlet and outlet options, pre-installed electronics and Diesel Exhaust Fluid (DEF) lines hook ups: all contributing to minimal work for the OEM.
For very tight installations a fully insulated aftertreatment module is available that lowers the surface temperature.
The DPF now uses passive regeneration, which is totally transparent to the operator and service free, so reducing maintenance costs over the life of the machine. This also facilitates easier installation in the engine bay since no direct access is required for ash removal.
On site the 1206F delivers an estimated 5% better cycle fluid consumption over previous models, that incorporates the diesel and the DEF necessary for the SCR technology - allowing the end user to get more done, faster and with lower operating cost.
“The 1206F range will continue to build on the success of our award winning Stage IIIB/Tier 4 Interim engine range,” comments Perkins Tier 4 Product Marketing Manager Daniel Clayton. “Today we are using third generation SCR technology which we have proven and validated for the off-highway market. We are effectively meeting legislative requirements without penalising the OEM or end user. In fact we are working to make things more advantageous including better fluid consumption, lower life costs and improved machine productivity while contributing to a cleaner environment.”
Meanwhile the 1204F, 4.4 liter, four cylinder aftercooled engine is offered in a choice of two versions. The single turbo aftercooled 1204F-E44TA, produces 110 kW (147 hp), delivering improved fuel economy while offering great power and torque. 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.
Mindful of OEM requirements when considering machine design and application, Perkins has focused on minimising the cost of transitioning machines from Stage IIIB/Tier 4 Interim to the latest regulations. By maintaining a high carryover of components from the previous Stage/Tier, keeping similar cooling packages and retaining compact dimensions for the engine envelope, Perkins has reduced the need for OEMs to undergo costly machine redesign.
Both 1204F models use aftertreatment comprising DOC/SCR modules. This compact solution not only achieves the significant reduction of NOx as required by the legislation, it also removes the need for any regeneration strategy for soot, since the formulation of particulate emissions is prevented in the combustion process.
The small size of the DOC/SCR module means it can be mounted in a variety of remote locations, freeing up valuable space in the engine bay, especially in more compact equipment.
Perkins does also offer the option of a service-free DPF aftertreatment unit on the 1204F-E44TA to meet specific OEM requirements.
For OEMs and end users the arrival of the 1204F range promises many benefits from ease of integration and flexibility to increased productivity and a lifetime of low cost. Many of the improvements made at Stage IIIB/Tier 4 Interim have been carried over into the new range such as improved power density, improved transient response and competitive fluid consumption.
For engines from 3.4 to 7.1 liters Perkins has tailored SCR systems that maximize customer benefits.
“We have used the arrival of SCR technology to our customers’ advantage,” says Clayton. “By offering a no DPF option we have given them unrivalled flexibility as to how they wish to configure their machines. What is certain is that machine performance will not be compromised.”
