John Deere Power Systems (JDPS) displayed their entire Interim Tier 4/Stage III B diesel engine lineup and announced engine models and power ratings at the Bauma 2010 show, April 19 — 25 in Munich, Germany. Emissions regulations begin 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 Tier 3/Stage III A requirements. The Interim Tier 4/Stage III B 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 Tier 3/Stage III A 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 between 56 kW (75 hp) and 129 kW (173 hp), 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 between 56 kW (75 hp) and 129 kW (173 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, 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.
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