![[Valid Atom 1.0]](valid-atom.png "Validate my Atom 1.0 feed")
DEF * USA - Everything you need to know about Diesel Exhaust Fluid
The ABCs of DEF
Nashville,TN,USA -Road King, by Paul Abelson -30 March 2010: -- New set of initials has entered trucking’s vocabulary: DEF (Diesel Exhaust Fluid) is being sold at truckstops and dealerships all across the country. Little has generated so many questions as this new product, so here are some answers.Why do we need DEF?
Actually, most of us don’t, at least not immediately. DEF is a chemical consumed during selective catalytic reduction (SCR), one of two alternative strategies to achieve 2010 EPA emissions regulations. If you don’t drive a 2010 or newer truck, you won’t need DEF. And if your 2010 is from Navistar, you won’t need it either. Their alternative for achieving EPA 2010 is to use Advanced EGR (exhaust gas recirculation), an enhanced version of EGR, the strategy all engine makers used to reduce oxides of nitrogen (NOx) for the 2004 regulations. All other engine makers combine EGR and SCR... The SCR process adds a urea solution to the exhaust stream. The urea is converted to ammonia and passed over precious metal catalysts that convert more than 90 percent of harmful nitrogen oxides to pure nitrogen and water vapor...
Labels: DEF
posted by Unknown @ 4:11 PM
0 Comments:
Post a Comment
<< Home