On 16 June a regulation (566/2011) was published that introduces further amendments to the Euro 5 and Euro 6 standards for light-duty road vehicles. It includes measurement procedures for particle mass and particle number. These are required to implement the Euro 5b stage, which starts on 1 September 2011 for new types and 1 January 2013 for all new vehicles. From stage 5b the particulate mass limit is 4.5 mg/km and the particle number limit is 6.0 x 1011 #/kWh for all compression ignition engines.
On 25 June the first implementing regulation (582/2011) for the Euro VI standards for heavy-duty vehicles was published. Among other things, it redefines the emission limit values to match the world-harmonised test cycles (WHTC transient cycle and WHSC stationary cycle), and incorporates particle number limits for compression ignition engines, at the levels of 6.0 and 8.0 x 1011 #/kWh, depending on test cycle. Particle number limits for positive ignition engines have yet to be defined.
Official Journal: http://eur-lex.europa.eu/JOIndex.do
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