New EPA Regulations Will Require Machine Reconfiguring, Add Cost

Final Tier 4: Size & Expense
By Jeff Griffin, Senior Editor | June 2010 Vol. 65 No. 6
The engine compartment of the Ditch Witch HT300. Final Tier 4 engines will likely be larger, requiring redesign.

“For engines 130 kW (174 hp) and greater beginning in January 2014, proven technologies such as cooled EGR and VGT will likely be the foundation for meeting those regulations. However, we are constantly evaluating emerging technologies for their effectiveness and for their ability to provide reliable and durable products in off-highway applications. As with engine configurations that meet previous emissions tiers, we’ll continue to tailor our Final Tier 4 engine solutions to fit the variety of off-highway applications, while not increasing the emissions compliance burden on our customers.

“It is anticipated that technologies similar to those used in on-highway engines will trickle down into off-highway products. However, one of the biggest challenges is the rate at which these technologies -- originally developed for on-highway use -- must be adapted for off-highway use. The time between adoption of a new technology for on-highway engines and its use in off-highway applications has continued to decrease. Off-highway equipment often works in harsher and more varied environments. Additional development time is required to make on-highway technologies suitable for off-highway applications. Ensuring the robustness of these technologies for off-highway use will continue to be a challenge through Final Tier 4/Stage IV.”

Case Construction Equipment, Richard Heisey, director, engine installation competence center: “Case has developed for interim Tier 4 standards a solution that relies on two technologies: cooled exhaust gas recirculation (CEGR) and selective catalytic reduction (SCR). Our priority is to provide our customers with cost-efficiency and performance, and we see advantages to both technologies, depending on engine size and load, as well as application demands. We are fortunate in having access to the tremendous resources and experience in CEGR and SCR technologies of our strategic partners which include Fiat Powertrain Technologies, a pioneer in low emission systems.

“For Final Tier 4, we will continue to work with our partners on developing the solution that will guarantee our customers the cost-efficiency and performance they expect of our equipment. The introduction of SCR technology as early as 2011 gives us a competitive advantage, because we have already invested in R&D that will be invaluable in helping us to achieve Final Tier 4 requirements. Having similar technology now allows us to keep our research investments focused on developing the next generation of construction equipment that will set new standards in cost-efficiency, productivity and performance.

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