How much DEF does a diesel use / consume?
DEF, or diesel exhaust fluid, is used in a selective catalytic reduction (SCR) system to remove nitrogen oxides (NOx) from engine exhaust. We carry DEF Products specifically for DEF applications, as well as hose reels, hose, and other DEF fitting accessories. To meet these requirements, many diesel engine manufacturers use Selective Catalytic Reduction (SCR), an emissions aftertreatment technology that converts nitrogen oxides (NOx) in the diesel-engine exhaust stream into nitrogen and water vapor, two natural components in the air we breathe. Diesel exhaust fluid (DEF; also known as AUS 32 and marketed as AdBlue) is a liquid used to reduce the amount of air pollution created by a diesel engine. With an API Diesel Exhaust Fluid (DEF) License, a marketer shows its customers first-hand that it believes in manufacturing DEF that meets rigorous industry requirements for DEF purity. All diesel engine manufacturersare now required by the EPA to integrate some tiered warning system (internal gauges on the dash) to let the driver know exactly how close to empty the DEF tank is. Medium- and heavy-duty vehicles have a dosing rate of 2-3%. Diesel Particulate Filter (DPF) – This works by using a mechanical filter to trap soot particles after they have been partially oxidized by a catalyst. Diesel is less dense than DEF, so it will float on the DEF. According to Chrysler's Service Masters DEF should be refilled every 10k miles and will not trigger CEL if frozen. However, the vehicle manufacturer is required to design the vehicle so you can’t. DEF is injected into the exhaust stream prior to the SCR catalyst. Because the emission control devices can be damaged by sulfur, we have also adopted requirements for in-use diesel fuel to decrease sulfur levels by more than 99 percent. I bought a new 2011 Monaco and was also told adding the DEF was a considerable cost addition and added significantly to the coach's weight. What is DEF? Our pumps and flow meters can be used in combination with totes, drums, and stand-alone applications. The DEF tank should be drained and thoroughly cleaned with deionized water before refilling. '11 for the Ford and Chevy, also the '11 dodge HD C&C. Diesel Exhaust Fluid (DEF) consumption is measured as a ratio of diesel fuel use, normally termed the "dosing rate" or "treat rate". Using SCR systems and DEF introduces many more components into a vehicle. If you ignore the DEF warning the truck will cease to work. Top of Page . If it enters the SCR catalyst, significant damage can occur that may require servicing or even worse, a (costly) replacement of the catalyst. The main components of the SCR system include the SCR catalyst, the DEF injector, the DEF tank, and the DEF supply module and filter (see image below).
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