Case to use EGR, urea-SCR on Tier 4 engines
12 March 2010
Case Construction Equipment recently announced its technology choices for meeting the Tier 4 interim (Tier 4i) standards that begin in 2011. Case will use two alternative technology paths: cooled exhaust gas recirculation (EGR) and selective catalytic reduction (SCR) across its product line.
The choice of either cooled EGR or the SCR technology will depend on the engine size and on the application demands. The SCR technology will require the use of urea solution (diesel exhaust fluid, DEF).
Case Tier 4i engines using the EGR technology will be fitted with diesel particulate filters to control increased PM emissions resulting from the use of EGR. The type of filters that Case intends to use—ceramic wall-flow filters or flow through filters—has not been disclosed. Tier 4i engines using SCR technology will not use particulate filters.
In developing its Tier 4 engines, Case is taking advantage of the resources available to it as part of the Fiat Group. Case Tier 4 product line includes over 90 equipment models, ranging from 11.3 kW (15.15 hp) to 397 kW (532 hp).