EPA-07 Information

EPA '07 Information
New emissions regulations for the trucking industry take effect in the U.S. in 2007. Emissions from diesel engines produced on or after January 1, 2007 must be reduced for nitrogen oxides (referred to as NOx) by 50% and particulate matter (PM) emissions must be reduced by 90%. PM is also known as soot.

A typical diesel-powered heavy-duty truck equipped with an engine that meets the 2007 emissions standards will emit approximately 1200 pounds less NOx and 90 pounds less PM each year than pre-2007 trucks.

These reductions are the latest in a string of increasingly strict emissions reductions the truck industry has met during the last two decades. The end result is significantly cleaner air for everyone, while still providing the efficient transportation our customers require.

Mack will meet the new emissions limits with two tested and proven technologies: High Efficiency Exhaust Gas Recirculation (HEGR) and a Diesel Particulate Filter (DPF).

Mack's Solution:

HEGR will be used to control and reduce NOx formation, while the DPF will trap PM. The end result will be significantly cleaner engines.

Mack is offering two arrangements of a catalyzed DPF - the Mack Capsule or Mack Cap DPF shown here, as well as a vertical back-of-cab (VBOC) arrangement. A noncatalyzed DPF is also available, primarily for refuse applications.

The third element of the 2007 diesel emissions reduction challenge is a new fuel formulation: ultra-low sulfur diesel fuel (ULSD). ULSD, with only 15 parts per million of sulfur, is necessary for the efficient functioning of the DPF. The new fuel will be required for use in all highway trucks in the U.S. and will be introduced in late 2006.  For more information on ultra-low sulfur diesel fuel (ULSD) go to http://www.clean-diesel.org

Frame Mounted Diesel Particulate Filter - Click Here ( PDF )
Vertical Diesel Particulate Filter - Click Here ( PDF )

Mack's High-Efficiency EGR for 2007 evolved from the EGR technology used on the company's ASET Highway engines since 2002. Fuel consumption remains comparable to current levels, and reliability has been proven over four years of production and on highway experience. Mack's HEGR technology relies on several simple processes.

How HEGR Works:
Hot exhaust exits the engine through the exhaust manifold. The exhaust then passes through the EGR valve. While most of the exhaust passes out through the exhaust system, the EGR valve diverts a measured amount of exhaust into the EGR system.