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Case Announces Its Technology Choices for Meeting Tier 4 Emissions Standards


New EPA Regulations Will Reduce Emissions by 90 Percent
Case Construction Equipment announced its plans to meet the next two phases of emissions requirements. Ultimately, compliance with Tier 4 final standards will result in a 90-percent reduction in particulate matter and nitrogen oxides, compared to Tier 3.
Tier 4 interim standards begin in 2011, and Tier 4 final standards take effect beginning in 2014. In February, Case announced using two distinct technologies, cooled exhaust gas recirculation (CEGR) and selective catalytic reduction (SCR), to address Tier 4 interim standards across its product line, which includes more than 90 equipment models.
The challenge in meeting Tier 4 standards is the simultaneous reduction of nitrogen oxides (NOx) and particulate matter (PM) levels. If the engine is tuned for maximum efficiency and performance, the high combustion temperatures reduce PM levels but increase NOx levels. In order to meet the ultimate goal of near-zero emissions with an SCR solution, these high NOx levels are reduced in the exhaust system with a diesel exhaust fluid additive, AdBlue®, combined with an SCR catalyst. . On the other hand, in engines that are tuned to reduce the NOx at source with CEGR technology, the combustion temperature is lower, which reduces the NOx created by the engine but increases PM, and an after-treatment exhaust filter system must be part of the solution.
Case sees advantages to both technologies depending on engine size, engine load and application demands. The company is taking advantage of the tremendous resources available to it as part of the Fiat Group, as well as the strengths of its worldwide strategic partners and suppliers.
Case has a track record of meeting customer needs for increased productivity, improved fuel efficiency, increased uptime, best-in-class serviceability and operator comfort. And these improvements have been made with an eye toward the environment.
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, allows the engine to do what it does best—generate power. The SCR after-treatment system requires the addition of AdBlue, 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. This technology provides excellent durability and low maintenance costs.
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 4 interim and Tier 4 final standards.

Source: Case Construction Equipment

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