Both are combined with Selective Catalytic Reduction systems, which, while in principle are the same, differ in application design based on vehicle parameters and emissions targets. (greencarcongress.com)
The diesel engine uses selective catalytic reduction (SCR) exhaust emission aftertreatment system to meet EPA's 2010 emission standards. (topspeed.com)
These are powered by a 7.7 - litre, in - line 6 - cylinder diesel engine with Selective Catalytic Reduction (SCR) technology and come in 6X2 or 6X4 configurations. (team-bhp.com)