John Deere Power Systems (JDPS) has announced that many of its engines under 100 hp (75 kW) are now U.S. Environmental Protection Agency (EPA) Tier III, Interim Tier IV and European Union (EU) Stage III A ready.
Four ratings of the PowerTech M 2.4L engine are planned for EPA Interim Tier IV. These engines also will meet current EU Stage III A standards, which took effect January 2007. The PowerTech M 2.4L engines are either naturally aspirated or turbocharged.
Four new ratings of the PowerTech E 2.4L engine and one new rating of the PowerTech E 3.0L are Interim Tier IV and Stage III A ready. The 2.4L engines are turbocharged and air-to-air aspirated and the 3.0L engine is turbocharged.
Planned power ratings for these Interim Tier IV ready and Stage III A engines are as follows:
• PowerTech M 2.4L: 42 to 49 hp (31 to 37 kW)
• PowerTech E 2.4L: 56 to 66 hp (42 to 49 kW)
• PowerTech E 3.0L: 65 hp (48 kW)
Additionally, JDPS is planning six PowerTech E Tier III/Stage III A ratings that will be offered above 75 hp (56 kW). These are as follows:
• PowerTech E 2.4L: 80 hp (60 kW)
• PowerTech E 3.0L: 76 to 99 hp (57 to 74 kW)
“With some of our PowerTech M and PowerTech E engines below 56 kilowatts, we chose to go straight from Tier II to Interim Tier IV. Because our 2.4-liter engines have demonstrated Interim Tier IV and Stage III A capabilities, we’ve met our 2008 deadline. This demonstrates that the technology we have developed is a great foundation for our Tier IV solution,” said Gita Rao, product manager of strategy and long-term planning for JDPS.
Preparing for Future Emissions Regulations
JDPS will leverage the technology developed to meet Tier III/Stage III A emissions as the basis for meeting future emissions regulations. John Deere is exploring various technology options, including advanced in-cylinder and after-treatment solutions.
“We have narrowed down the technologies we are exploring for Tier IV, but have not yet settled on the solution that will be right for our customers and us,” said Rao. “For Tier IV, we are planning to continue with the multiple-platform option. We’re trying to include many potential solutions for Tier IV. The goal is to determine which concepts work best together in order to provide a solution that meets the needs of each given application.”
JDPS also is optimizing the combustion system for reduced emissions. This includes the use of multiple injections, increased fuel injection pressure, modified combustion bowl and fuel injector geometry. JDPS is reviewing a number of after-treatment technologies, including diesel oxidation catalyst (DOC) and diesel particulate filter (DPF) systems.
John Deere also is working on NOx absorbers, lean NOx catalysts and selective catalytic reduction (SCR) solutions. Homogeneous charge compression ignition (HCCI) continues to be explored as an alternative solution.
For more information, call 800/JD-ENGINE or visit www.JohnDeere.com/jdpower.
