As from January 2011, EU Stage 3b, US-EPA Tier 4 interim (T4i) and Japan MLIT Step 4 emission regulations will apply to nonroad mobile machinery (NRMM) engines across the power range 130-515 kW (174-751 hp).
The new rules specify a further reduction of 90% particulate matter (PM) and 45% nitrogen oxides (NOx), making some form of exhaust after-treatment unavoidable. From 2012 the standards will apply to NRMM engines in the 56-129 kW range. Stage 3b/T4i require a maximum PM level of 0.02 g/kWh (0.015 g/bhp-hr) and NOx of around 2 g/kWh....
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This complete item is approximately 2000 words in length, and appeared in the March/April 2010 issue of Bulk Materials International, on page 12.
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