Case IH Announces Solution To Meet Tier 4A Standards

To provide producers with superior operating cost efficiency and performance, Case IH will use a two-fold solution to meet the 2011 Tier 4A emission standards for off-road equipment. This approach includes: 1. Selective Catalytic Reduction (SCR) system for medium-and heavy-duty engines (greater than 100 horsepower). 2. Cooled Exhaust Gas Recirculation (CEGR) for light-duty engines (less than 100 horsepower). Tier 4 regulations require a minimum 90 percent reduction in particulate matter and up to 50 percent reduction in nitrogen oxides over Tier 3 requirements. Both CEGR and SCR systems lower emissions of nitrogen oxide and particulate matter for cleaner engine output. However, SCR in high horsepower engines may offer the advantages of longer service intervals, lower fuel consumption and wider fuel compatibility when compared to CEGR systems. SCR technology represents the best approach for high horsepower agricultural equipment. Why SCR? Consensus among the industry’s leading engineers is that all manufacturers will need to use SCR to meet the even more stringent Tier 4B standards beginning in 2014. Case IH believes SCR is the most efficient way to meet EPA standards for agricultural applications. How it works In an SCR system, engine exhaust passes through the catalytic chamber where it is sprayed with a non-toxic, colorless, odorless mixture of chemical urea and purified water. When the mixture combines with hot exhaust in the catalytic chamber, it is broken down into water vapor and nitrogen. Filling the urea tank is easy, and it’s designed to last at least as long as two tanks of fuel.