John Deere Power Systems today introduced the PowerTech PWL 4.5L engine, which will meet Tier 4 Final/Stage IV emissions regulations without a diesel particulate filter (DPF). The 63 to 104 kW (85 to 140 hp) engine was announced at bauma 2013 in Munich, and complements the John Deere lineup of Tier 4 Final/Stage IV off-highway diesel engines rated 36 to 448 kW (48 to 600 hp) announced earlier.
The PowerTech PWL 4.5L engine reduces cost and improves engine packaging by eliminating the DPF — while still meeting customer performance expectations for applications in the 56 to 104 kW (75 to 140 hp) power segment.
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.
“We believe the elimination of the DPF will serve OEMs and end users well in the very competitive 56 to 104 kW (75 to 140 hp) segment, balancing packaging and product cost considerations with performance and operating cost requirements,” says John Piasecki, Director of Marketing, Sales and Customer Support for John Deere Power Systems. “We expect emissions technologies will continue to evolve and improve, and we’ll adopt those changes when available to improve the customer experience.”
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 IV.
For the 36 to 55 kW (48 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 56 to 104 kW (75 to 140 hp) power range will be equipped with an Integrated Emissions Control system configured with SCR, a DOC and cooled EGR. Engine models above 104 kW (140 hp) will feature an Integrated Emissions Control system consisting of cooled EGR, a DOC/DPF and SCR. All John Deere Integrated Emissions Control systems are exclusively designed to meet the specific demands of off-highway applications in the given power categories.
“At John Deere, we tailor our Integrated Emissions Control system configurations to meet customer needs and Final Tier 4/Stage IV emissions regulations,” Piasecki says. “We’re confident that all of our solutions will deliver industry leading performance and value while also meeting required long term emissions compliance.”
John Deere did attain an industry leading fuel economy position with its Tier 3/Stage IIIA and Tier 4 Interim/Stage IIIB engines. With the move to SCR technology for Tier 4 Final/Stage IV engines, total fluid economy becomes important, and John Deere is confident that its total fluid operating costs will continue that industry leadership. Total fluid economy takes into account an engine’s total fluid consumption, including diesel fuel and diesel exhaust fluid (DEF). DEF consumption with John Deere Tier 4 Final/Stage IV engines will be 1 to 4% of diesel fuel consumption depending on the application. Low DEF consumption also means 1) the DEF tank size can be smaller, minimizing space required on vehicles, 2) extended DEF filter service intervals, and 3) less on-site bulk storage requirements.
John Deere Tier 4 Final/Stage IV engines will provide the same or higher levels of power density and transient response as the Tier 4 Interim/Stage IIIB product lineup.
Models and power ratings for the full John Deere Tier 4 Final/Stage IV lineup include:
- PowerTech EWX 2.9L: 36 to 55 kW (48 to 74 hp)
- PowerTech EWX 4.5L: 55 kW (74 hp)
- PowerTech PWL 4.5L: 63 to 104 kW (85 to 140 hp)
- PowerTech PSS 4.5L: 93 to 129 kW (125 to 173 hp)
- PowerTech PVS 6.8L: 104 to 187 kW (140 to 250 hp)
- PowerTech PSS 6.8L: 168 to 224 kW (225 to 300 hp)
- PowerTech PSS 9.0L: 187 to 317 kW (250 to 425 hp)
- PowerTech PSS 13.5L: 309 to 448 kW (414 to 600 hp)
“Staying true to our building block approach, we have adopted the best available technologies to meet Tier 4 Final/Stage IV regulations while minimizing the impact on OEMs and end users,” Piasecki says. “The Integrated Emissions Control system in its various configurations represents technology optimization that achieves emissions compliance, and delivers the power, performance, ease of operation, fluid efficiency, reliability, durability and economical operating cost customers expect from John Deere.”
John Deere has an established record of reliability, accumulating over 22 million operating hours with various aftertreatment technologies. John Deere claims a large dedicated in-house aftertreatment team, working with a mature exhaust filter and SCR supply chain, all to provide a field-proven Tier 4 Final/Stage IV product lineup.
The worldwide John Deere dealer network of over 4,000 service locations will be trained and prepared to fully support customers and their Tier 4 Final/Stage IV engines.
