Exhaust Gas Recirculation (EGR)
Exhaust Gas Recirculation (EGR) reduces nitrogen oxides (NOx) by cooling the exhaust and circulating it back through the engine during the combustion process. This process increases the amount of particulate matter (PM) in the final exhaust gas. A diesel particulate filter (DPF) is placed downstream of the exhaust to trap these harmful particles. This system requires the use of ultra-low sulfur fuel, low-ash oil, and the DPF must be serviced periodically.
Terex Tip: Ultra-low sulfur fuel required by EGR systems may be in limited supply or not available at all in non-Tier 4 / Stage IV countries.