M.H.C.V. Product EURO 4 EMISSION LEVELS Current regulations (EEC 88/77-EC1999/96-EC 2001/27- EC 2005/55) allow registration of Euro 3 vehicles and also those with Euro 4 or Euro 5 emission levels, however, they don't establish any other constraints for the emission control system. Euro 4 vehicles coming into service after October the 1 st , 2006 (October the 1 st , 2005 for new type approvals) will have to be fitted with a diagnostics system (On Board Diagnostics) covering operation of the emission reduction system. For SCR a telltale will have to light up when the AdBlue level drops below a certain value (minimum 10% of the tank capacity).
An 'irregular engine operation' telltale will light up when the tank is empty. One year after introduction of phase one – from October 1, 2007 for new registrations (starting October 1, 2006 for new type approvals) – all Euro 4 vehicles must be equipped with a system encouraging conformity with the law', independent of the technology adopted. If the nitrogen oxide content exceeds the maximum permitted value by a certain measure the warning 'irregular engine operation' will appear on the instrument panel and this anomaly will be recorded by the onboard computer.
If the pre-alarm level is continuously exceeded (or if the urea tank is empty) this will initiate a procedure governed by the electronic fuel injection management system to reduce engine torque. This reduction will take place after the vehicle's ignition is next turned off. In accordance with the new Euro 4 regulations, the useful-life or durability periods, defined as a distance or time over which compliance with emission limits has to be assured as a part of the requirements of type-approval, are fixed as follow: * 100.000 km or 5 years for category: N1 ( * 200.000 km or 6 years for category: N2 (> 3.5 ton, N3 (> 12 ton, * 500.000 km or 7 years for category:
N3 (> 16 ton) Commercial Documentation - Eurocargo Euro 4 Page No. C.3