Deere to merge SCR/EGR technologies

In a complete change to its previous stance, John Deere says, from 2014, it will be using Selective Catalytic Reduction (SCR) technology to meet stage 4 emission regulations.

Despite an aggressive marketing campaign highlighting its machines only run on a single fluid, the manufacturer says it plans to use SCR in conjunction with its current Exhaust Gas Recirculation (EGR) system.

It says this amalgamation will maintain particulate matter levels established by stage 3b regulations and will reduce nitrogen oxide levels by 80 per cent.

The system’s introduction will start in 2014 for models larger than 174hp (130kW) - smaller models will receive the technology throughout 2016.

John Piasecki, director of worldwide marketing, sales and customer support for John Deere Power Systems, says: “Exhaustive research and testing has determined an SCR system integrated with our stage 3b engine platform will be the best solution to achieve stage 4 emissions compliance.”

It says, the combined use of EGR and SCR systems allows John Deere engines to use less Diesel Exhaust Fluid (DEF/AdBlue) compared to other SCR solutions. This means the DEF tank can be smaller while also extending DEF tank service intervals.

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