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Efficiency and Productivity
John Deere Power Systems, which manufactures diesel engines from 30 kW to 448 kW (40 hp to 600 hp), has been a leader in reducing diesel engine emissions, and has shown ways to harness engine power while minimizing its impact on the environment.
John Deere is developing appropriate technologies to address the next level of stringent emissions standards taking effect in the United States and Europe in 2011. The standards—Interim Tier 4 in the United States and Stage III B in the European Union—affect non-road diesel engines. For engines of 130 kW (174 hp) and above, John Deere plans to add aftertreatment to its PowerTech Plus engine technologies, which include variable geometry turbo charging, cooled exhaust gas recirculation, high-pressure fuel systems, four-valve cylinder heads, and electronic controls. Many John Deere engines under 56 kW (75 hp) already are Interim Tier 4 and Stage III A compliant.
Besides engines, John Deere Power Systems makes heavy-duty drivetrain components such as transmissions, axles, planetary drives, and pump drives for non-road applications. As a result, the company can skillfully integrate engines, drivetrain components, and electronic engine-control units. This capability is important in maximizing fuel economy and performance while meeting emissions regulations.
Coupling John Deere's Tier 3/Stage III A engines and leading transmission designs, the company's products achieve remarkable efficiency levels. The John Deere 8430 Tractor, for example, set a record for lowest specific fuel consumption among row crop tractors at the University of Nebraska Tractor Test Laboratory, the officially designated tractor testing station for the United States. The 8430 was equipped with the PowerTech Plus 9.0L engine coupled to the John Deere Automatic Power Shift transmission. The PowerTech Plus engine features variable geometry turbo and cooled exhaust gas recirculation in a more-powerful, cleaner-burning design. It incorporates the new Vari-Cool cooling system with precise control for fan speed and air flow.
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