InfraStructures - June/July 2007 - John Deere Power Systems Offers Tier 3, Interim Tier 4 and Stage III A Ready Engines

John Deere Power Systems Offers
Tier 3, Interim Tier 4 and Stage III A Ready Engines

John Deere Power Systems has announced that many of its engines under 100 hp are now U.S. Environmental Protection Agency (EPA) Tier 3, Interim Tier 4 and European Union (EU) Stage III A ready.

"With some of our PowerTech M and PowerTech E engines below 75 hp, we chose to go straight from Tier 2 to Interim Tier 4. Because our 2,4 l engines have demonstrated Interim Tier 4 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 4 solution," said Gita Rao, product manager of strategy and long-term planning for John Deere Power Systems.

John Deere Power Systems will leverage the technology developed to meet Tier 3 /Stage III A emissions as the basis for meeting future emissions regulations. John Deere is exploring various technology options, including advanced in-cylinder and aftertreatment solutions.

John Deere Power Systems is also 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. The company is reviewing a number of aftertreatment technologies, including diesel oxidation catalyst and diesel particulate filter systems. John Deere is also working on NOx adsorbers, lean NOx catalysts and selective catalytic reduction solutions. Homogeneous charge compression ignition continues to be explored as an alternative solution.

Source: John Deere Power Systems