The Essentials of Vehicles – Breaking Down the Basics

What You Need to Know about Diesel Exhaust Fluid

Diesel Exhaust Fluid (DEF) is what we call the high quality operating fluid that is used jointly with diesel vehicles and selective catalytic reduction (SCR) technology. It is a 32.5% solution of high-purity, synthetically created, urea in de-mineralized water. It is placed into a separate tank on the truck, and is simple to handle, non-toxic and safe for use. Diesel Exhaust Fluid (DEF) consumption is calculated as a ratio of diesel fuel use, also referred to as the “dosing rate” or “treat rate”. Medium- and heavy-duty vehicles generally have a dosing rate of 2-3%. Here are a number of the most crucial things that you need to know about diesel exhaust fluid.

Functions of DEF

Most diesel-powered on-road vehicles manufactured since 2010 employ SCR technology and require DEF. Several examples are heavy-duty trucks, diesel pick-ups, delivery vans, and European luxury cars. Diesel powered off-road equipment like those used for agricultural and construction has been mandated to use SCR technology since 2014.

Keeping DEF Pure

DEF purity is critical. One essential aspect in maintaining DEF purity and quality is the kind of dispensing system used. Closed system containers feature a valve coupling system that fortifies the container opening on drums and totes (IBC) to prevent debris, dirt, bugs, etc from coming into the container and contaminating the DEF. Contrastingly, open system containers are drums or totes that do not have a valve insert in the container’s opening, which implies that dirt or debris can get into the container and pollute the DEF.

Buying DEF

Owing to the fact that majority of diesel-powered passenger cars and trucks manufactured since 2010 are furnished with Selective Catalytic Reduction (SCR) and require DEF, it is can easily be bought at most fueling stations. Truck stops also usually have a DEF pump right on the fuel island. You can also purchase DEF at most OEM locations, as well as other dealers and distributors.

Running Low on DEF

The EPA orders all truck manufacturers to provide some kind of staged warning system (some include actual gauges) to inform the driver about precisely how close to empty the system is. Whether a vehicle goes into a “limp home” or lower engine power or constrains the number of times you can turn the engine on will be dependent on the specific car or truck model, but at some point it will not start. In a nutshell, you should treat your DEF tank the same way you treat your fuel tank; you certainly do not want to leave yourself stranded because you disregarded the indicators.