Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue[3]) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water.

2024年7月29日 · Diesel exhaust fluid, or DEF, is a key component in lowering pollutants emitted from diesel engines, helping to improve efficiency and reduce emissions.

2023年12月17日 · Diesel Exhaust Fluid (DEF) systems, commonly used in diesel engines to reduce emissions, can face several technical issues. Here's a breakdown of some common problems: 1. Contamination: DEF is a solution of urea and deionized water. It's crucial that it …

This article explains how DEF (Diesel Exhaust Fluid) works in conjunction with the SCR in diesel engines and how the EPA regulations affect truck owners.

2023年3月20日 · It’s called DEF for short, but the very first thing you may be wondering is what on earth is diesel exhaust fluid, and the answer is quite simple: it’s a fluid that gets injected into the exhaust system of your truck to help reduce pollution.

Learn more about diesel exhaust fluid, including chemistry and function, regulation history, and best practices for maintaining a diesel system that uses DEF. Table of Contents. How DEF is Used in Diesel SCR Systems. Purpose of DEF; What is DEF Made Of? How Does DEF Work? Selective Catalytic Reduction (SCR) Aftertreatment Systems; History of ...

Since around 2002, SCR (Selective Catalytic Reduction) systems that use Diesel Exhaust Fluid (DEF) made their appearance in the automotive market. So what’s in DEF? DEF is a solution (or mixture) of 32.5% Urea and 67.5% de-ionised water.

2024年12月9日 · DEF (Diesel Exhaust Fluid) is a water and urea solution used in selective catalytic reduction (SCR) systems to reduce nitrogen oxide (NOx) emissions from diesel engines. True. DEF is indeed a solution composed of 67.5% deionized water and 32.5% urea.

DEF, an acronym for Diesel Exhaust Fluid, is the trucking industry’s response to U.S. Environmental Protection Agency standards requiring all medium and heavy-duty diesel vehicles to significantly reduce engine emissions, particularly nitrous oxide as well as particulate matter.

2022年11月28日 · In 2010, engineers introduced diesel exhaust fluid (DEF) as an effective after-treatment solution for selective catalytic reduction systems. Today, the EPA mandates that all medium to large vehicles with diesel engines must have integrated DEF technology.