Tier 4 Technology Takes Off

January 20, 2010 06:00 PM
Margy Fischer, Farm Journal Machinery Editor
New emissions regulations are coming down the road that will have a major impact on agriculture. As of Jan. 1, 2011, engines for off-road applications will have to meet the latest emissions regulation standards that of a 90% reduction in particulate matter and a 45% reduction in nitrogen oxide.
It's called Interim Tier 4 and agricultural equipment manufacturers at the recent Ag Connect Expo were starting to preview how they will meet those standards. Reaching the regulations will be a significant hurdle beyond Tier 3 standards. Not all companies will use the same technology, but one thing is for sure—you're going to notice the changes.
Selective Catalytic Reduction (SCR) technology is one of the concepts emerging as way to prep engines for the new emission expectations. The other option is pairing existing engine systems (cooled exhaust has recirculation (EGR) and advanced fuel systems) with aftertreatment systems including diesel particulate filters.
Cummins showed their interim Tier 4 technology on an engine for agricultural application at Ag Connnect Expo for the first time. 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 after treatment equipment and designs for the next step in emission regulations. The diesel particulate filter will replace the muffler in its current position on the machine in both John Deere and Cummins models.

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 is going the SCR route. The company unveiled 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 indicating it will use SCR to meet interim Tier 4 regulations, which uses AGCO Sisu Power engines. However, other companies have indicated 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. Company representatives tell Farm Journal that an announcement will be made as early as later this month.

You can e-mail Margy Fischer at mfischer@farmjournal.com.

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