GOTHENBURG, Swe. — A number of truck manufacturers representing 80 per cent of the European truck market have opted for SCR in meeting Euro 5 emissions standards and beyond.

Volvo Trucks has joined with DAF, Iveco, Mercedes-Benz and Renault in agreeing to use Selective Catalytic Reduction (SCR) to meet new Euro 4, Euro 5 and future exhaust emissions standards in Europe.

The announcement comes as chemical and oil companies have assured the industry a regular supply of AdBlue a water/urea solution required by SCR technology.

SCR combines nitrogen oxides into harmless water vapour and nitrogen through use of a catalytic converter. A small amount of AdBlue is sprayed into the hot exhaust gas stream as part of the process. AdBlue is the commercial name given to the aqueous urea solution.

While engine manufacturers on this side of the pond have said they will not be adopting SCR to meet the 2007 emissions standards, it has not been entirely ruled out for future EPA standards in North America.