Case Construction Equipment said it is ready to meet the next two phases of emissions requirements. Tier IV interim standards begin in 2011, and Tier IV final standards come into effect beginning in 2014.
Case is using two distinct technologies, cooled exhaust gas recirculation (CEGR) and selective catalytic reduction (SCR) to address Tier IV interim standards across its product line, which includes more than 90 equipment models, ranging from 15.15 to 532 hp (11.3 to 397 kW).
The challenge in trying to meet Tier IV standards — interim and final — is that the CEGR technology that reduces nitrogen oxides (NOx) increases particulate matter (PM) levels, while the SCR technology that reduces PM levels increases NOx levels, according to the manufacturer.
In order to meet the ultimate goal of near-zero emissions, an after-treatment exhaust filter system must be part of a CEGR solution, and a diesel exhaust fluid additive must be part of an SCR solution.
Case sees advantages to both technologies depending on engine size and load and also application demands, and it is taking advantage of the resources available to it as part of the Fiat Group, as well as the strengths of its worldwide strategic partners and suppliers.
When Case machines meet Tier IV final standards, it will have achieved a 90-percent reduction in particulate matter and nitrogen oxides, compared to Tier III.
Benefits of SCR and CEGR
SCR is a cool-running, quiet system that’s separate from the main engine function and does not compromise horsepower or torque. It does not interfere with engine performance and, in fact, it actually improves performance. The SCR after-treatment system requires the addition of a diesel exhaust fluid.
CEGR technology provides a user-friendly solution that requires no change in the operation of the machines. It is a system that relies on an exhaust filter system to remove particulate matter from the exhaust.
Case developed its SCR and CEGR technologies to ensure that customers continue to receive the productivity they expect from their Case equipment while complying with Tier IV interim and eventually Tier IV final standards.
For more information, visit www.casece.com.
