The Army is testing new technology that will allow Apache helicopter pilots to see their targets up close, in high definition color.

The downstream DEF doser, which is the second doser, plays a key role in reducing remaining NOx over the second, main SCR catalyst.” ...

PACCAR has patented a method to evaluate Diesel Exhaust Fluid (DEF) quality in emissions aftertreatment systems. By analyzing NOx conversion efficiency in SCR units, the system adjusts DEF dosing ...