John Deere Final Tier 4/Stage IV Engine
During the 2012 Commodity Classic, John Deere unveiled its final stage Tier 4 solution, the John Deere Integrated Emissions Control System. The company held a press conference to make the announcement. You can listen to or download the audio from that press conference below. To give us an overview of the final solution we heard from Geoff Stigler, Manager, Worldwide Marketing. Geoff runs through the steps leading up to this final one. The image below is the John Deere PowerTech™ PSS 9.0L Final Tier 4/Stage IV engine (engine w/after treatment).

Final Tier 4/Stage IV regulations for off-highway diesel engines begin as early as 2013 for engines 55 kW (74 hp) and below. Regulatory dates for engines 56 kW (75 hp) and above will be implemented in stages starting in 2014 and 2015, and require particulate matter (PM) levels established by Interim Tier 4/Stage III B regulations to be maintained while requiring an additional 80 percent reduction in nitrogen oxides (NOx) from previous regulations.
“At John Deere, we continue to offer the right combination of technologies at the right time to meet increasingly stringent emissions regulations and customer needs,” said John Piasecki, director of worldwide marketing, sales and customer support for John Deere Power Systems. “Exhaustive research and testing determined that an application-specific SCR system that is well integrated with our proven Interim Tier 4/Stage III B engine platform will be the best solution to achieve Final Tier 4/Stage IV emissions compliance while delivering the power, performance, ease of operation, fluid efficiency, reliability and economical operating cost that our customers expect from John Deere.”
Consisting of an exhaust filter and SCR aftertreatment components that are optimized and fully integrated, the Integrated Emissions Control system will allow John Deere engines to utilize less diesel exhaust fluid (DEF) than alternative Interim Tier 4/Stage III B SCR technology solutions. Lower DEF consumption means DEF tank size can be smaller — minimizing the impact on vehicle applications, extending DEF filter service intervals and reducing operator involvement. Monitored and controlled by proprietary electronics within John Deere’s enhanced engine control unit (ECU), the Integrated Emissions Control system also provides outstanding fluid efficiency without sacrificing overall performance.
For more information on John Deere’s Final Tier 4/Stage IV engine technology, check our web site at www.JohnDeere.com/tier4.
Listen to or download the press conference here: John Deere Tier 4 Press Conference
You can find photos from this year’s Commodity Classic here: 2012 Commodity Classic Photo Album
Coverage of the 2012 Commodity Classic Show is sponsored by John Deere
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