And then, if warnings continue to be ignored, the machine will de-rate the engine to basically force the operator to get out of the machine and refill the system. If the operator ignores the warnings, the machine will start logging diagnostic codes. In the simplest form, there is a level sensor in the tank that monitors the DEF level, and if the level gets too low, the machine will advise the operator that that tank is getting low and needs filling up. “Within Cat, and among industry peers, the systems are robust against operating a machine without DEF. What happens when you operate a machine without DEF? As the newly combined molecules flow through the catalyst filter in the aftertreatment system, it breaks down those components into nitrogen and water, which are harmless gasses so it’s taking harmful gases and converting it into a harmless gas,” says Miller. “In diesel exhaust emissions systems, when we spray DEF into the diesel exhaust gases, a chemical reaction takes place. You could use regular water, but deionized water prevents scaling in the system, among other things,” says Miller. “DEF is a simple product made of 67.5 percent deionized water and 32.5 percent urea. Here are the top questions about DEF and the most common ways DEF gets contaminated. “DEF and the onboard systems that use it have been engineered, and most engine manufacturers have made considerable investments in it, so it will probably be around for the foreseeable future.” So, a lot of the latest equipment use DEF and other system components as a cost-effective means of eliminating NOx from diesel engines,” says Andy Miller, service training manager, Caterpillar. One of the key emissions that these standards are designed to reduce is nitrogen oxides (NOx). “Many areas in the world have introduced standards to reduce emissions that are produced by diesel engines.
SERVICE DEF SYSTEM SEE DEALER RESET HOW TO
Environmental Protection Agency (EPA) standards for diesel engine, yet there are a lot of people who don’t understand what DEF is, its function and how to store it. Fluids are essential for machine operation, and contractors should familiarize themselves with how to handle them and use them to ensure their equipment functions properly.ĭiesel exhaust fluid (DEF) has been on the market since 2014 as one component to creating an engine aftertreatment system that meets U.S.
0 kommentar(er)
