John Deere Power Systems has announced the technology solutions it will use to meet the stringent Interim Tier 4/Stage III B mobile off-highway emissions regulations for engines 130 kW (174 hp) and above. These emissions regulations, which begin in 2011, require a 90 percent reduction in diesel particulates (PM) and a 50 percent reduction in oxides of nitrogen (NOx) from previous Tier 3/Stage III A requirements.

To achieve compliance with these emissions regulations, John Deere will start with its proven Tier 3/Stage III A PowerTech™ Plus engine platform, add a diesel oxidation catalyst (DOC)/diesel particulate filter (DPF) unit for reducing particulates, and increase the percentage of cooled exhaust gas recirculation (EGR) for NOx control.

Experience with Cooled EGR and VGT

John Deere was the first engine manufacturer to widely commercialize cooled EGR and VGT technologies in off-highway applications. During Tier 3, John Deere has accumulated significant operating hours with these technologies in off-highway applications and has established a proven record of reliability. Other engine manufacturers are just now considering the use of these effective technologies in their off-highway Interim Tier 4 product offerings. With its Tier 3 engines and these technologies, John Deere was able to achieve record fuel economy gains over its Tier 2 models and claim best-in-class fuel economy.

John Deere Engines under 56 kW (75 hp) Already Interim Tier 4 Compliant

Six ratings from the John Deere PowerTech M and PowerTech E engine lineups already meet Interim Tier 4 and Stage III A emissions requirements. In early 2007, JDPS announced that PowerTech M 2.4L engines and PowerTech E 2.4L engines under 56 kW (75 hp) are Interim Tier 4 and Stage III A compliant.

PowerTech M 2.4L engines feature 2-valve cylinder heads, fixed-geometry turbochargers, mechanical unit pump fuel systems and 500-hour oil change intervals. PowerTech E 2.4L engines feature full-authority electronic engine controls, electronic unit pump fuel systems and air-to-air-aftercooling.

Integration
John Deere Power Systems is one of the few companies that manufacture engines exclusively for off-highway applications and integrates entire powertrain systems from the engine and electronics to the drivetrain components. Because these parts are built to work together, John Deere is able to deliver maximum performance and fuel economy while meeting emissions regulations.

www.JohnDeere.com/Tier4

About John Deere Power Systems
John Deere Power Systems (JDPS) manufactures 30 kW to 448 kW (40 hp to 600 hp) engines for use in a variety of off-highway applications, including marine, power generation and general industrial. JDPS also manufactures and markets marine engines and drivetrain components. JDPS can be contacted at 1-800-JD-ENGINE (1-800-533-6446), or via e-mail at jdpower@JohnDeere.com. Information about the full line of JDPS engines and drivetrain components is available online at www.JohnDeere.com/jdpower.