How Does Def Work In A Diesel Engine?

DEF (Diesel Exhaust Fluid) is a non-hazardous mixture of 32.5 percent urea and 67.5 percent deionized water. DEF is sprayed into diesel vehicles’ exhaust streams to break down harmful NOx emissions into harmless nitrogen and water. Selective Catalytic Reduction (SCR) is a system that can be found on 2010 and later model year vehicles, as well as many diesel pickups and SUVs. DEF isn’t a gasoline additive, and it’s never mixed with diesel. It’s kept in its own tank, usually with a blue filler cap.

Is DEF fluid made from urine?

Because urine is not made of diesel exhaust fluid, urinating in your SCR system will result in you having to pay a lot of money to clean and replace engine components once they’ve been contaminated. Following the deductive premise that urine contains urea and so urine + water = DEF is 100 percent incorrect and will result in a slew of costly mechanical issues. In either urea or water, the urea contained at urine is neither in the proper concentration for DEF, nor is it of sufficient purity. To summarize, urine and DEF equals Never. REMEMBER NOT TO PEE IN YOUR DEFENSE TANK!

What does DEF do to a diesel engine?

We get a lot of questions about DEF and how to use it effectively on your forecourt, so we asked the expertise of Danny Seals, a forecourt solutions expert, to provide us with some simple answers.

What is DEF?

DEF is a urea-water solution that is injected into the exhaust stream of diesel automobiles to convert NOx gases (harmful emissions) into nitrogen and water. Vehicle manufacturers introduced a Selective Catalytic Reduction (SCR) technology to meet EPA emissions limits in 2010. This is a strategy to achieve the requirements without sacrificing engine performance or fuel economy. DEF isn’t a fuel additive, and it’s kept in its own tank.

Who needs DEF, why?

DEF is required for medium and heavy-duty vehicles equipped with diesel engines manufactured after 2010. To meet emissions rules, the vehicle is configured to inject DEF into the exhaust stream. The engine performance will be diminished and lower speeds will be imposed if the vehicle is allowed to run out of DEF.

What are the different delivery modes of DEF?

DEF is available in a variety of forms. A driver can purchase jugs/containers in a variety of sizes. This necessitates the driver physically transferring the DEF into the car. When installed, DEF can also be dispensed into the vehicle using a fueling dispenser.

Which retailers should offer DEF and what indicators can they use to decide?

Because there is such a vast population of automobiles on the road, DEF is an excellent product for all c-stores to offer. Retailers who sell diesel at their gas stations can utilize the volume sold to estimate the number of diesel customers they have. DEF is required by the majority of today’s heavy-duty trucks. Locations with a separate large truck filling station might think about putting DEF in the dispensers. Because they buy DEF in quantity to keep in their tanks, this results in higher profit margins. Some places that sell a lot of diesel on their forecourt should also consider a dispenser option.

How can Gilbarco help retailers get into DEF?

Since the inception of DEF requirements, Gilbarco has been the industry leader in DEF dispensers. Over the years, we’ve worked with large stores to provide dispenser functionality, and we’ve established the industry standard for this service. Gilbarco assists merchants in entering the DEF dispensing market by providing factory-installed options and retrofitting existing dispensers where DEF is stored in bulk.

Is DEF bad for diesel engines?

While the water and urea mixture is excellent for the environment, it can cause crystals to form, which can clog fuel filters, damage aircraft engines, and cause engine failure. DEF is sprayed directly into exhaust systems and should never be used as a fuel additive, diesel or airplane.

Will a diesel run without DEF?

SCR is quickly becoming one of the most critical components in diesel automobiles. With tougher pollution restrictions and regulations, diesel vehicle owners need make sure their SCR systems are in good working order.

It’s also critical to check that the diesel exhaust fluid level is enough. Without DEF, modern trucks will not run. As a result, diesel truck owners must check their fluid levels on a regular basis. Everyone should strive to reduce pollution. Maintaining your vehicle will also help you save money on emissions and DEF.

Can I pee in DEF tank?

A local dealer paid Consumer Reports $317 to add 7.5 gallons of AdBlue in its Mercedes-Benz GL320 test car, with the fluid costing $32/gallon. Most dealers buy AdBlue in bulk (albeit 7.5 gallons in half-gallon bottles would only cost $116.25).

What if the motorist is in the middle of nowhere, miles away from the nearest dealer? Is it possible for him or her to supply some temporary urea in order to get the car to a dealer? The question arises due to the presence of 2 to 4% urea in human urine.

Unfortunately, the answer is “no.” Your pee is not the correct substance for a modern clean diesel automobile to recognize.

What happens if you pee in the DEF tank?

Despite certain similarities, DEF and pee are not the same thing. Some people believe you can pee in your DEF tank because of these similarities. Saving money is nice, but your tank should only contain DEF. DEF and urine are not interchangeable, and if you pee in your DEF tank, you could be looking at some expensive repairs.

Peeing in a DEF tank can destroy the filters and the entire SCR system if done too often due to the other compounds included in urine. The systems will also be unable to perform their function of reducing carbon emissions from diesel exhaust.

Using urine instead of certified DEF can harm the entire system, which can be costly to repair. The cost of replacing the filter alone, according to Freedom-CNG, can range from $2,500 to $5,000. The filter should be replaced every 200,000 miles, but if you urinate in your DEF tank, you’ll need to do it much sooner.

What happens when you run out of DEF?

Vehicle makers must implement procedures to ensure that vehicles cannot run without Diesel Exhaust Fluid, according to the US Environmental Protection Agency (DEF). The driver of a vehicle receives a succession of alerts on their dashboard displays before the DEF tank runs out (much the same way as if they were running low on diesel). In general, an amber warning bulb will illuminate when the DEF tank level drops below 10%, flashing at 5%, and solid amber warning light will illuminate when the DEF tank level dips below 2.5 percent.

The engine’s power is lowered, a solid red warning is displayed, and the vehicle’s speed is limited to 5 mph until the DEF tank is refilled if the truck is allowed to run out of DEF.

Will DEF freeze in my truck?

DEF, whether in storage tanks or equipment, can freeze and cause problems. When temperatures dip below 12°F, DEF begins to crystallize and ceases to function properly. Because of the precise ratio utilized, the entire mixture can freeze and thaw together like water and ice.

Is DEF made from pig urine?

That’s why, starting in 2010, all diesel trucks were required to have systems dedicated to putting DEF to use. Diesel Exhaust Fluid, which is made up of 32.5 percent urea and 67.5 percent de-ionized water, is sprayed into a vehicle’s exhaust system to aid in the breakdown of NOx emissions, converting them to harmless nitrogen and water. If you’re thinking to yourself, “Urea is a type of urea. You’re on the right brainwave if that sounds oddly like ‘urine.’ When a body metabolizes protein, it produces urea, an organic molecule. (We do, in fact, excrete it as pee.) However, despite DEF’s moniker, “Diesel Exhaust Fluid is really constructed of commercial-grade urea—synthetic ammonia and carbon—and is referred to as “pig urine.”

To put it another way, the urea and water in DEF heat up and produce ammonia. The NOx emissions are subsequently neutralized as the ammonia breaks down. The tail pipe emits fewer harmful substances, allowing everyone to breathe a little better.

Can I put ammonia in my DEF tank?

There’s a lot of misconceptions out there concerning Diesel Exhaust Fluid (DEF). Many diesel engines require DEF as an additive. Its creation and implementation represented a big step forward in reducing greenhouse gas emissions. DEF, when used in engines using Selective Catalyst Reduction (SCR) technology, reduces NOx and particulate matter emissions by 90%, resulting in a near-zero emission level.

DEF is a non-hazardous, watery solution made up of 32.5 percent urea and 67.5 percent de-ionized water, if that wasn’t remarkable enough. “Urea?” you inquire. “Isn’t that simply pee?” you might wonder. Not at all. That’s just another one of those annoying DEF myths that still exists today. We at NEXGEN DEF wish to help clear up some misconceptions about DEF. We’ve compiled a list of the most frequent DEF myths so you can empower yourself with the facts.

DEF is toxic: FALSE

DEF is a non-flammable, non-toxic, and non-hazardous fluid. It does not require special handling and does not pollute the environment. It has a pH of 9.0, which is similar to that of regular baking soda. For the sake of comparison, water has a pH of 7.0. DEF is manufactured from urea, a nitrogen-rich chemical that is commonly used in fertilizers. It’s easily absorbed by plants, allowing them to grow rapidly. Urea is used in agriculture to the tune of 90% of the world’s supply. The type utilized in automotive grade items is even less harmful than agriculture grade.

DEF is less harmful than diesel fuel, engine oil, braking fluid, antifreeze, and windshield washer fluid, among other fluids in your truck.

DEF is pumped into the exhaust stream of your car, where it reacts with the NOx in the SCR catalyst. As a result, NOx and DEF combine to generate nitrogen and water, both of which are naturally occurring constituents in the air we breathe. This is better to NOx, which causes acid rain, smog, and the growth in greenhouse gas levels, from an environmental (and safe working) standpoint.

DEF is urine: FALSE

Has anyone ever told you that urea is animal urine? Or is it the same as human urine? Not at all. Synthetic urea has been made from synthetic ammonia and carbon dioxide in a heated, sealed method since the 1930s.

The automotive-grade urea used in DEF fulfills the American Petroleum Institute’s stringent production and emissions criteria.

DEF makes use of a considerably purer, particulate-free urea than is required for agricultural applications. DEF is 32.5 percent urea and 67.5 percent de-ionized water. In comparison, human pee contains extremely little urea.

DEF is hard to use: FALSE

DEF is a liquid that can be purchased from bigger, commercial filling stations or from automotive components and lubricant providers off the shelf. It’s as simple as topping off your windshield wiper fluid to refill the DEF tank.

You don’t have to replenish your DEF supply every time you fill up your tank. Depending on how much you’re transporting, you’ll consume around 2.5 gallons of DEF every 800 miles or so, which equates to about five to ten refills per year.

DEF is unstable: FALSE

At any temperature, urea does not become poisonous. Freezing and thawing have no effect on DEF’s chemical composition. DEF will meet ISO standards of less than 0.2% ammonia for at least 35 days, even at high temperatures (which are prevented by the cooling and temperature stabilizing architecture of DEF engines). It would take nearly two years to obtain the ammonia levels found in household ammonia at that temperature. DEF is, in a nutshell, quite stable.

A CSR/DEF vehicle gets poor gas mileage: FALSE

Fact: Vehicles equipped with DEF receive comparable fuel mileage to vehicles equipped with other emissions-reducing technology.

You may as well choose the CSR/DEF vehicle because emissions are regulated and you must satisfy specific requirements. You’ll notice improved fuel economy and more power. Lower maintenance costs arise from less wear and tear on your engine.

Commercial carriers who use DEF vehicles benefit from improved combustion and less concerns with regeneration.

Want to learn more about DEF and how it may help your engine and the environment? Check out our article on the progression of the diesel engine to clean-burning DEF.

Your DEF expert

NEXGEN is the leading DEF supplier in the Pacific Northwest. We’ve even expanded to include a new production plant in SeaTac that can produce a million gallons of DEF every month. We now provide NEXGEN DEF to Seattle and western Canada through our SeaTac facility.

Our most recent step was to bring our product to the pump by installing NEXGEN DEF dispensers in a rising number of Cardlocks around Oregon, making it easier than ever to get the most up-to-date diesel system technology.