THE NEXT PHASE IN EMISSIONS REDUCTION

Cat Tier 4 Interim engines meet tough emissions standards and deliver the performance and efficiency that successful businesses demand. Like all manufacturers of diesel engines, Caterpillar is required to deliver engines that meet government emissions standards that are being phased-in throughout the United States, Canada, Europe and Japan.

CLEANER FUEL & OILS

Also part of the upcoming emissions standards, industry technology requires <15 parts per million (mg/kg) Ultra Low Sulfur Diesel Fuel (ULSD) for use in Tier 4 Interim engines. In Cat engines, not only will ULSD need to be used, but also low sulfated ash oils. These cleaner fuels and oils will help reduce ash and maintain service intervals, contributing to low emissions and reduced operating costs. The new Cat engines will also have B20 biodiesel capability, adding even greater sustainability where desired or required.

Emissions standards have been systematically reducing levels of Particulate Matter (PM) and Oxides of Nitrogen (NOx) since 1996 when the first standards went into effect.

From Tier 1/Stage I (1996) levels to Tier 3/Stage IIIA (2006), emissions standards required an approximate 65 percent reduction in PM and a 60 percent reduction in NOx.

The next phase of emissions standards, called Tier 4 Interim in the U.S. and Canada and Stage IIIB in the European Union, takes effect in 2011. Compared to Tier 3/Stage IIIA levels, Tier 4 Interim/Stage IIIB standards require a 90 percent reduction in PM and a 50 percent decrease in NOx. Tier 4 Final/Stage IV standards, which will become effective in 2014, reduce NOx by an additional 40 percent, taking PM and NOx emissions to near-zero levels.