As of Jan. 1, 2011, engines for off-road applications will have to meet the latest emissions regulation standard. When interim Tier interim goes into effect it will require a 90% reduction in particulate matter and a 45% reduction in nitrogen oxide.
This is a significant hurdle to jump after the manufacturers met the latest Tier 3 standards, and not all of the ag equipment companies will use the same technology and equipment to meet the government standards.
There are two concepts that have emerged as the major ways companies plan to prep their engines for the new emission expectations: Selective Catalytic Reduction technology or pairing existing engine systems (cooled exhaust has recirculation (EGR) and advanced fuel systems) with aftertreatment systems including diesel particulate filters.
For the first time, Cummins showed their interim Tier 4 technology on an engine for agricultural application at Ag Connnect Expo. The company outfits their new line of engines with an integrated intake-to-exhaust aftertreatment system. Cummins has more than 18,000 hours of field testing with prototype interim Tier 4 compliant engines.
Cummins displays their interim Tier 4 solution using cooled EGR and a diesel particulate filter.
John Deere began showcasing their interim Tier 4 solution this past summer. John Deere power systems will also use additional aftertreatment equipment and designs for the next step in emission regulations. In both these cases the diesel particulate filter will replace the muffler in its current position on the machine.
John Deere will pair cooled EGR and a diesel particulate filter for John Deere Power Systems engines to be compliant with the upcoming regulations.
AGCO unveiled their use of SCR for the first time with their AGCO DT Series, Challenger MT600C Series and Massey Ferguson 8600 Series in February 2009. SCR requires the use of a urea additive that needs to be refilled about every other time the diesel tank is refilled.
AGCO machinery will meet interim Tier 4 emissions with engines using Selective Catalytic Reduction (SCR), which requires the use of urea.
So far AGCO is the only company to say it will use SCR to meet interim Tier 4 regulations, which uses AGCO Sisu Power engines. Although many companies say SCR may have to be used when final Tier 4 goes into effect.
Case IH and New Holland have yet to announce their engine technologies to meet interim Tier 4 standards. When asked, company representatives have said an announcement will be made as early as later this month.