John Deere Power Systems exhibits their Stage III B/Interim Tier 4 engines at SIMA 2011 JOHN DEERE POWER SYSTEMS
Emissions regulations began January 1, 2011 for 130 kW (174 hp) and above engines and require a 90 percent reduction in diesel particulate matter (PM) and a 50 percent reduction in nitrogen oxide (NOx) from previous Stage III A/Tier 3 requirements. The Stage III B/Interim Tier 4 regulation effective date for 56 kW (75 hp) to 130 kW (174 hp) engines is January 1, 2012.
For engines 56 kW (75 hp) and above, John Deere will start with their proven PowerTech™ Plus Stage III A/Tier 3 in-line, four and six-cylinder engine platform — which includes cooled exhaust gas recirculation (EGR) for NOx control — and add an exhaust filter for reducing PM. These engines will feature full-authority electronic controls, a four-valve cylinder head, a high-pressure fuel system, turbocharging and an air-to-air aftercooling system.
Engines below 130 kW (174 kW), will be available in 4.5L and 6.8L displacements and will be equipped with either a wastegate or variable geometry turbocharger depending upon the size of the engine.
Compared to John Deere’s larger engines, models below 130 kW (174 hp) will feature smaller exhaust filters that can be engine-mounted or remote-mounted for increased flexibility. Engines in this power range will use an in-cylinder dosing system for active regeneration, while John Deere’s 130 kW (174 hp) and above engines use an external dosing system.
John Deere engine models 130 kW (174 hp) and above include the 6.8L, 9.0L and 13.5L displacements.
John Deere was the first engine manufacturer to widely commercialize cooled EGR and variable geometry turbocharger (VGT) technologies in off-highway applications, introducing them in 2005 with the start of Stage III A/Tier 3 regulations. Since then, John Deere has accumulated significant operating hours with these technologies in off-highway applications and has established a proven field record of reliability.
“Our lineup of John Deere Stage III B/Interim Tier 4 engines delivers the performance, reliability, durability and low operating costs our customers have come to expect from our engines,” said John Piasecki, director of worldwide marketing, sales and customer support for JDPS.
13 June 2011
