In 2011 a particle number (PN) limit was introduced in the European Union’s vehicle exhaust legislation for diesel passenger cars. The PN method requires measurement of solid particles (i.e. those that do not evaporate at 350 °C) with diameters above 23 nm. In 2013 the same approach was introduced for heavy duty engines and in 2014 for gasoline direct injection vehicles. This decision was based on a long evaluation that concluded that there is no significant sub-23 nm fraction for these technologies. This SAE paper (2015-24-2512) examines the suitability of this PN method for L-category vehicles (two- or three-wheel vehicles and quadri-cycles).

State of the working draft including results from the 12 EPPR informal group session.

Barouch Giechaskiel, Alessandro Zardini, and Giorgio Martini (EC Joint Research Centre) SAE paper examining the suitability of current EU particle number methods for application to motorcycle-type vehicles.

EPPR group chair proposal + results of discussions during 10 September 2015 EPPR session concerning the draft evaporative and crankcase emissions GTR definitions of “engine family”.