NON ROAD ENGINES CONFORMITY TESTING BASED ON PEMS - Lessons Learned from the European Pilot Program

Since the EURO V standards for heavy-duty engines, the European emissions legislation requires to verify the conformity of heavy-duty engines with the applicable emissions certification standards: these provisions are identified as “In Service Conformity” (ISC). It was considered impractical and expensive to adopt an ISC scheme for heavy-duty vehicles requiring the removal of engines from vehicles to test pollutant emissions against legislative limits. Therefore, it was proposed to develop a protocol for in-service conformity checking of heavy-duty vehicles based on the use of Portable Emission Measurement Systems (PEMS). As a result, ISC testing based on PEMS was introduced in the EURO V and the EURO VI standards. The corresponding administrative and technical provisions were formulated in the European Regulations 582/2011 and 64/2012. The above route was followed for non-road engines as well: preliminary research activities studied and confirmed the possibility to apply the methods developed for heavy-duty engines with minor modifications. The basis for the introduction of ISC provisions based on the PEMS approach into the European NRMM type-approval legislation has been established in several texts. The NRMM PEMS Pilot Program was launched to facilitate the introduction into the European NRMM emissions legislation of use of PEMS as a tool for ISC. This had to be achieved by improving the technical procedures (e.g. available from the heavy-duty scheme) and increasing the awareness of the different stakeholders about PEMS as a new regulatory tool.JRC.F.8-Sustainable Transpor