A bit DEF cleans lots of air.
Generally known as DEF, diesel exhaust fluid is an emissions after therapy, launched to the exhaust gasoline of a diesel engine to diminished nitrogen-oxide (NOx) emissions.
You’ll have seen DEF (also called AdBlue, which is a model title) within the aisles of a truck cease or ironmongery shop. The fluid, which is comprised principally of urea and water, is usually bought in 1- and a pair of.5-gallon containers, in addition to bigger vessels to be used in over-the-road vans. DEF can be retailed at truck-stop gasoline pumps in bulk kind, which is handy for truck operators, as large tractor trailers usually have DEF tanks as massive as 20 gallons. Diesel-powered pickup vans have smaller DEF tanks, usually 5-6 gallons.
What’s DEF?
Emissions
Essential to the operation of what’s often known as the Selective Catalytic Discount (SCR) system, DEF employed appropriately may also help to scale back NOx emissions by as a lot as 90 p.c. One of the harmful byproducts of diesel combustion, NOx emissions contribute to respiratory issues, acid rain, and ground-level ozone, also called smog. Environmental Safety Company (EPA) rules mandating using DEF have been handed into legislation in 2010, requiring that every one heavy-duty diesel engines constructed starting in 2015 make use of the SCR system.
DEF Packaging and Costs
The fluid itself, which is about two thirds water and one third artificial urea, just isn’t particularly costly, and might run from $8-$12 per gallon, relying on the retailer and bundle measurement. The pump-side dispensers are usually the least-expensive buy possibility. A 20-gallon DEF tank will present a typical over-the-road truck with about 6000 miles of operation.
Limp Mannequin
By legislation, as soon as a car’s DEF discuss is depleted, the truck in query will function in “limp” mode, which reduces engine energy output till fluid is added to the tank. A warning that the DEF tank is approaching empty usually seems on a truck’s instrument panel roughly 100 miles upfront of full depletion.
Tampering
Whereas it was briefly in style for the operators of diesel-powered vans to take away the SCR methods, that motion has confirmed detrimental to long-term possession of the car. Not solely is tampering with the SCR system unlawful, many dealerships will decline to take an clearly tampered-with truck in commerce.
Automobiles
Truck requiring DEF use embody diesel-powered heady-duty variations of the Chevrolet Silverado, Ford F-Collection pickup, GMC Sierra, and Ram pickup. These along with all diesel-powered medium- and heavy-duty vans.
Deal with with Care
Dried DEF tends to crystalize on car surfaces, so care ought to be exercised when including the fluid to your car. Left to dry, DEF could fade painted physique panels.
Hearken to the Automobile Stuff Podcast
DEF Footage
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