Update on the JRC comprehensive environmental effects study to evaluate the air quality and the share of pollutants contributed by L-category vehicles, covering the requirements of test types I, III, IV, V, VII and VIII.

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.

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).

Update on the Euro 5 effect study initiated to validate the emissions requirements established by Regulation EU No. 168/2013 and Regulation EU No. 134/2014, evaluate the air quality and share of pollutants contributed by L-category vehicles (under test types I to VIII), and assess the feasibility of further post-Euro 5 development of off-cycle emissions and particle number testing and in-service verification requirements.

Review of conclusions from the first phase of the Euro 5 Effect Study.