Deere Introduces 4.5 L No-DPF Diesel
John Deere Power Systems (JDPS) has introduced the PowerTech PWL 4.5L engine, which will meet Tier 4 final/Stage 4 emissions regulations without a diesel particulate filter (DPF). The 75 hp to 140 hp diesel was announced at bauma 2013 in Munich.
The new diesel complements the John Deere lineup of Tier 4 final/Stage 4 off-highway diesel engines rated 48 hp to 600 hp announced earlier. The PowerTech PWL 4.5L is equipped with an Integrated Emissions Control system consisting of selective catalytic reduction (SCR), a diesel oxidation catalyst (DOC) and cooled exhaust gas recirculation (EGR) technology. Elimination of the DPF was enabled through combustion system optimization and improvements in SCR system conversion efficiency, JDPS said.
The introduction of the PowerTech PWL 4.5L engine represents the third Integrated Emissions Control system configuration John Deere will offer for Tier 4 final/Stage 4. For the 48 hp to 74 hp power range, John Deere will offer models using a DOC/DPF without cooled EGR or SCR. The PowerTech PWL 4.5L in the 75 hp to 140 hp range will be equipped with an Integrated Emissions Control system configured with SCR, a DOC and cooled EGR. Engine models above 140 hp will feature an Integrated Emissions Control system consisting of cooled EGR, a DOC/DPF and SCR.