In the context of increasingly strict emission standards, vehicles using diesel engines are forced to adopt more efficient emission control solutions. One of the important technologies today is the SCR system combined with a specialized solution to treat NOx gas. so Diesel engine exhaust gas treatment solution What is? How does the principle work and why does it become a mandatory requirement on many Euro 4, 5, 6 models? This is a content that many car owners and transport businesses are interested in.
1. What is diesel engine exhaust gas treatment solution?
Diesel engine exhaust gas treatment solution, also known as DEF (Diesel Exhaust Fluid), is a colorless, non-toxic liquid, used on diesel vehicles equipped with a selective catalytic reduction system SCR (Selective Catalytic Reduction). This is a mandatory solution on many cars that meet Euro 4, Euro 5 and Euro 6 emission standards to control nitrous oxide (NOx) emissions.
The composition of DEF consists of 32.5% pure urea and 67.5% deionized water. The ratio of 32.5% was determined to be the optimal level for the solution to reach a suitable freezing point and ensure the reaction efficiency in the SCR system. DEF is not fuel and must not be poured into the diesel tank, but is stored in a separate tank and sprayed directly into the exhaust gas stream.
The main function of Diesel engine exhaust gas treatment solution is the conversion of NOx – a toxic gas produced during high-temperature combustion to nitrogen (N2) and water vapor (H2O) harmless before being discharged into the environment. As a result, the vehicle meets strict emissions regulations without reducing engine performance.
DEF is manufactured according to international standards such as ISO 22241 and DIN70070 to ensure stable purity and quality. The use of standard solution helps the SCR system to operate accurately, avoid damage and maintain long-term efficiency of exhaust gas treatment.
2. Why do diesel engines need exhaust gas treatment solutions?
Diesel engines operate at higher combustion temperatures than gasoline engines. When the temperature in the combustion chamber is high, nitrogen (N2) and oxygen (O2) in the air react with each other to form nitrogen oxide compounds (NO and NO2), collectively called NOx. This is a group of gases that cause serious pollution, directly affecting human health and the environment.
NOx can irritate the respiratory tract, contribute to the formation of acid rain and degrade air quality. Therefore, environmental management agencies have set strict emission standards such as Euro 4, Euro 5, Euro 6 to control the amount of NOx arising from vehicles.
Gasoline engines have lower combustion temperatures, so the amount of NOx generated is less and usually does not need an SCR system. Meanwhile, diesel engines without additional treatment solutions will be difficult to meet current emission limits. This is the reason Diesel engine exhaust gas treatment solution Become a must-have in modern diesel car configuration.
The use of DEF allows the manufacturer to optimize the engine in the direction of increasing power and combustion efficiency, instead of having to “reduce heat” to limit NOx. As a result, the vehicle still ensures reasonable traction, durability and fuel consumption, and at the same time meets environmental regulations.
3. Working principle of diesel exhaust gas treatment solution
Working principle of diesel exhaust gas treatment solution based on the SCR system – Selective Catalytic Reduction. This is a technology that uses chemical reactions to convert Nox into non-harmful substances.
When the engine is operating, the hot exhaust gas exits the combustion chamber and is led through the exhaust system. Here, an exact amount of DEF is sprayed into the exhaust stream. Under the action of high temperature, urea in the solution breaks down to ammonia (NH3) and carbon dioxide (CO2).
Ammonia then enters the SCR catalyst. Inside the catalyst, NH3 reacts with NO and NO2 in the emissions according to chemical reactions, forming nitrogen gas (N2) and water vapor (H2O). Nitrogen occupies most of the natural air, so it is completely safe to discharge into the environment.
The whole process is controlled by the sensor system and electronic control unit, ensuring that the amount of DEF injected is always suitable for the motor load and the emission level. If the DEF is missing or the system fails, the vehicle will warn and may switch to power restriction mode.
Thanks to this principle, the SCR system can reduce 80-95% of NOx in diesel exhaust without negatively affecting the vehicle’s performance.
4. Benefits of using diesel exhaust gas treatment solution
use Dies engine exhaust gas treatment solutionL is not only to meet legal regulations but also bring many direct benefits to vehicle users. Here are the important benefits when the SCR system operates properly with DEF meeting quality standards.
Reduce Emissions NOx 80-95%
The most obvious benefit of diesel emissions solution is its ability to drastically reduce the amount of NOx in the exhaust gas. Through the reaction between ammonia and NOx in the SCR catalyst, most toxic gases are converted to nitrogen and water vapor. The reduction can reach 80-95% depending on the engine configuration and operating conditions. This contributes to improving air quality, reducing adverse impacts on public health and urban environment.
Comply with Euro 4, 5, 6 emission standards
Euro emission standards are increasingly tightening the Nox limit for diesel vehicles. Without the SCR system using DEF, the medium is difficult to meet this requirement. The use of a standard exhaust gas treatment solution helps the vehicle operate legally, avoiding penalties or refusal to register. This is an important factor for transport businesses and business vehicle owners.
Optimized engine performance
Thanks to the SCR treatment of NOx at the post-combustion stage, the manufacturer can design the engine to operate at optimal conditions in terms of power and torque. The engine does not need to reduce the temperature of the combustion chamber just to limit NOx. This helps the vehicle operate strongly, stably and suitable for large loads or long distance conditions.
Save fuel 3-5%
When the engine is optimized in the direction of performance instead of focusing on reducing emissions, fuel consumption can be improved. In fact, using the right DEF can save about 3-5% of fuel. With trucks or vehicles operating continuously, this savings creates a significant cost difference in the long term.
Extend the life of the SCR system
The solution meets ISO 22241 and DIN70070 standards to ensure high purity, free of residues that cause residue or corrosion. When using quality DEF, the injectors, sensors and SCR catalysts are better protected, reducing the risk of damage. This helps to reduce repair costs and prolong the life of the entire exhaust system.
5. AdBlue® By Madin – Solution for Euro 4-6 Diesel Engine
AdBlue® By Madin is Diesel engine exhaust gas treatment solution Produced by Madin Chem, a company specializing in auto additives in Vietnam. The product is developed to meet the needs of NOx handling on Euro 4, Euro 5 and Euro 6 standards.
The composition of AdBlue® By Madin includes 32.5% high purified urea and 67.5% deionized water, ensuring the correct ratio according to international regulations. The product meets ISO 22241 and DIN70070 standards, and is recognized by the German Automobile Industry Association (VDA). This gives users peace of mind about the purity and stability of the solution when used in the SCR system.
When used properly, AdBlue® By Madin can help reduce NOx emissions by 80-95%, while optimizing engine performance and saving 3-5% fuel. The product is non-toxic, non-flammable and packed with suitable materials to avoid corrosion.
In addition to product quality, Madin Chem also builds a distribution system in the North and the South, consulting and providing suitable solutions for transport businesses, individuals and diesel vehicles. With the production process on automatic lines and strict control, AdBlue® By Madin is the right choice for users who are looking for a standard, stable and long-term efficient DEF solution.
Contact information
MADIN COMPANY LIMITED
- Hanoi warehouse: 756B Nguyen Khoai – Thanh Tri – Hoang Mai – Hanoi
- Hotline: 0886634634
- Email: https://www.adblue.com.vn/
- Factory address: Road 206 Pho Noi A Industrial Park, Van Lam, Hung Yen
Epilogue
Understand Diesel engine exhaust gas treatment solution What is and the operating principle of the SCR system helps users to be more proactive in operating, maintaining and complying with environmental regulations. Using the right DEF not only reduces 80-95% of NOx emissions, but also contributes to optimal engine performance. In it, AdBlue® By Madin of Madin Chem is a solution that meets Euro 4-6 standards, reaches ISO 22241 and DIN70070, ensuring stable quality, safety and long-term efficiency for diesel vehicles.
