The new Euro norms for exhaust reduction impose tough demands on all vehicle manufacturers. The difference in exhaust emissions requirements between a Euro 3 and a Euro 4 engine is considerable. Emissions of nitrogen oxides (NOx) have to be cut from 5 to 3.5 g/kWh, a reduction of 30%. Particulate (PM) emissions must drop from 0.1 to 0.02 g/kWh. This corresponds to a reduction of no less than 80%.
Several European countries are already encouraging advance compliance with Euro 4 and Euro 5 through incentives such as lower road tolls (for instance 10 instead of 12 cents/km in Germany) or more favourable depreciation rates for correspondingly equipped vehicles (for instance in the Netherlands). Incentives to use this environmentally friendly technology are shortly to be expected in other European countries as well. Please contact the appropriate authority in your country for details. You can also turn to your Volvo Trucks Euro 4/Euro 5 contact for more information on this matter.