M.H.C.V. Product EURO 4 EMISSION LEVELS Conformity with future Euro 4 standards requires a considerable reduction in NOx and particulate emission levels. Eurocargo is already able to meet these environmental requirements, satisfying the regulations which will be introduced. Cutting down nitrogen oxides in the exhaust system by means of an additive – AdBlue– is the solution Iveco has adopted on the medium and heavy range. All Eurocargo Models are therefore equipped with the SCR (Selective Catalytic Reduction) system with a new and optimised tector engine, a urea tank, an AdBlue dosing system and a catalytic converter.
Choosing this exhaust after-treatment method also means Eurocargo will meet emission standards established in the Euro 5 Directive ahead of time. The Euro 4 Directive reduce particulate emissions by 80% and nitrogen oxides by 30% compared to Euro 3 levels. The Euro 5 Directive then requires a further 40% reduction for nitrogen oxides The SCR – Selective Catalytic Reduction – solution consists of optimising engine combustion to achieve maximum reduction of the particulate content in exhaust gases. Engine performance is improved and this leads to lower fuel consumption.
To eliminate the percentage of nitrogen oxides in exhaust gases that exceed the limit, first a reducing agent is added to the gases and then these are treated by a catalytic filter in the silencer. This procedure converts the nitrogen oxides into entirely harmless nitrogen and water vapour. The reducing agent is ammonia, stored in the form of a urea-based aqueous solution and marketed under the brand name AdBlue. SCR technology means that particulate filtration is superfluous inasmuch as this type of emission is cut down directly during the combustion phase, while the catalytic converter burns up the remaining particulate simultaneous with treatment of the nitrogen oxides.
A basic advantage of the SCR system is that it can satisfy both Euro 4 and Euro 5 emission level requirements, which means Eurocargo has been able to develop a solution for both emission levels simultaneously. Post-treatment is based on a simple principle: the chemical reaction of ammonia (NH 3 ) with the nitrogen oxides NO and NO 2 to produce two harmless substances – water vapour (H 2 O) and nitrogen (N 2 ). These are the relevant formulas: Commercial Documentation - Eurocargo Euro 4 Page No. C.5