The hardware on the 2.9-liter up to the 13.5-liter John Deere Power engines, already equipped with diesel particulate filters, is Stage V ready, says Carl Micu, John Deere Power Systems.
Micu spoke with Equipment World at the Bauma trade show in Munich, Germany, this week. The Stage V European emission regulations, still three years away, may be a precursor to potential “Tier 5” regulations in the United States.
“We’ve been using DPFs since Tier 4 Interim,” says Micu. “In certain markets, we also offer engines without DPFs.” Micu, however, points out that John Deere has several million hours on DPF-equipped engines, both with its own equipment and on its OEM business. Micu says as technology advances to expect some physical downsizing on the DPFs themselves.
Final Tier 4/Stage IV John Deere engines showcased at Bauma include:
- PowerTech EWX 2.9-liter, going from 48 to 74 horsepower
- PowerTech PWL 4.5-liter (85 to 140 horsepower)
- PowerTech PVS 6.8-liter (140 to 250 horsepower)
- PowerTech PSS 9.0-liter (250 to 425 horsepower)
- PowerTech PSS 13.5-liter (414 to 600 horsepower)
The engines use a variety of aftertreatment and emissions-reduction component combinations, including DPFs, diesel oxidation catalysts, selective catalytic reduction and cooled exhaust gas recirculation. Two additional John Deere Integrated Emissions Control system configurations for Tier 4 Final/Stage IV include:
- On 48 to 74 horsepower engines, the system will use a DOC/DPF without cooled EGR or SCR.
- On 74 to 140 horsepower, the PowerTech PWL 4.5L engine uses a DOC and a SCR, used in conjunction with an EGR.