As we are all aware, starting from July 1, 2019, all vehicles, including special vehicles, have implemented the National VI emission standard nationwide. This marks a significant step forward in environmental protection and vehicle technology. With the increasing popularity of National VI models, it is essential to understand the differences in their use compared to vehicles with the National V emission standard. In this article, we will provide a detailed overview of the instructions for the use of National VI models.
I. Instructions for the use of oils and fluids
Diesel for National VI models All diesel models of National VI must use regular diesel that meets the National VI standard of GB 19147. The choice of fuel is crucial as inferior diesel can have severe consequences on the engine and emission control systems. Inferior diesel often contains impurities and contaminants that can damage engine parts such as high-pressure fuel pumps and injectors. These components are essential for the proper functioning of the engine and play a vital role in fuel injection. When damaged by low-quality diesel, they can lead to improper fuel delivery, reduced engine performance, and increased fuel consumption.
In addition to affecting the engine directly, inferior diesel can also damage the Diesel Particulate Matter (DPM) unit. The DPM unit is responsible for trapping and reducing particulate matter emissions from the exhaust. When damaged, it can lead to increased emissions of harmful pollutants, such as particulate matter and soot. This not only has a negative impact on the environment but can also result in fines and penalties for non-compliance with emission standards.
The DOC (Diesel Oxidation Catalyst) catalytic converter in the aftertreatment system is another component that can be affected by inferior diesel. The DOC catalytic converter helps to oxidize hydrocarbons and carbon monoxide in the exhaust gases. If it fails due to the use of low-quality diesel, it can lead to increased emissions of these pollutants and a reduction in the overall effectiveness of the aftertreatment system.
Furthermore, the DPF (Diesel Particulate Filter) can become blocked and fail when exposed to inferior diesel. The DPF is designed to trap and remove particulate matter from the exhaust. When blocked, it can cause backpressure in the exhaust system, reducing engine performance and potentially leading to engine damage. In some cases, a blocked DPF may require expensive cleaning or replacement.
The use of inferior diesel can cause permanent damage to some parts of the engine and emission control systems, ultimately increasing high maintenance costs. Repairing or replacing damaged components can be a significant expense for vehicle owners and operators. Therefore, it is essential to use only regular diesel that meets the National VI standard to ensure the proper functioning and longevity of the vehicle.
Urea solution for National VI models All models of National VI, including wreckers and truck-mounted cranes, must use urea solution that meets the GB 29518 standard. Urea solution is an important component of the Selective Catalytic Reduction (SCR) system, which is used to reduce nitrogen oxide emissions. The SCR system injects urea solution into the exhaust stream, where it reacts with nitrogen oxides to form harmless nitrogen and water.
Using inferior urea can have several negative consequences. Inferior urea may contain impurities that can block and damage the urea pump and urea nozzle. The urea pump is responsible for delivering urea solution to the SCR system, while the urea nozzle sprays the solution into the exhaust stream. When damaged, these components can lead to improper urea delivery, reduced effectiveness of the SCR system, and increased emissions of nitrogen oxides.
In addition to damaging the urea pump and nozzle, inferior urea can also cause crystallization and blockage in the SCR box. Crystallization occurs when the urea solution evaporates and leaves behind solid deposits. These deposits can accumulate over time and block the flow of exhaust gases through the SCR box, reducing its effectiveness and increasing emissions.
To ensure the proper functioning of the SCR system and meet emission standards, it is essential to use only urea solution that meets the GB 29518 standard. This will help to maintain the internal cleanliness of the urea tank and ensure the proper operation of the SCR system.
II. Instructions for the maintenance and use of filtration systems
Use of original filtration components Be sure to use original air filters, diesel filters, engine oil filters, and other filtration components to ensure the cleanliness of intake air, fuel, and engine oil. These filtration components play a crucial role in protecting the engine and emission control systems from contaminants.
The air filter is responsible for filtering out dust, dirt, and other particulate matter from the intake air. Inferior air filters may not be as effective at filtering these contaminants, leading to an increase in the intake particulate matter of the engine. This can cause engine wear and damage, reducing the engine’s lifespan and performance. In addition, increased particulate matter in the intake air can also lead to DPF blockage and damage, as mentioned earlier.
Diesel filters and engine oil filters are also essential for maintaining the cleanliness of fuel and engine oil. Inferior diesel filters or engine oil filters may not be able to filter out contaminants effectively, leading to damage to components such as high-pressure fuel pumps and injectors. These components are sensitive to contaminants and can be damaged by even small amounts of dirt or debris. When damaged, they can lead to improper fuel delivery, reduced engine performance, and an increase in the failure rate of the aftertreatment system.
Importance of regular maintenance Strictly follow the maintenance specifications and regularly perform corresponding cleaning, maintenance, or replacement of various filtration components. Regular maintenance is crucial for ensuring the proper functioning of the filtration systems and the overall performance of the vehicle.
Air filters should be inspected and cleaned or replaced regularly, depending on the operating conditions. In dusty environments or with heavy use, air filters may need to be replaced more frequently to ensure proper filtration. Diesel filters and engine oil filters should also be replaced according to the manufacturer’s recommendations to maintain the cleanliness of fuel and engine oil.
By following the maintenance specifications and regularly maintaining the filtration systems, vehicle owners and operators can ensure the cleanliness of intake air, fuel, and engine oil, reducing the risk of engine wear and damage and improving the performance and longevity of the vehicle.
The emissions of all vehicles are related to the three filters, urea solution, and oil quality. Therefore, during the use of National VI models, it is essential to pay close attention to these factors. By using the correct oils and fluids and maintaining the filtration systems properly, vehicle owners and operators can ensure that their vehicles meet emission standards and operate efficiently.
For example, imagine a truck-mounted crane operating in a construction site. The dust and debris in the environment can quickly clog the air filter if it is not regularly maintained. This can lead to increased engine wear and reduced performance. Additionally, if inferior diesel or urea solution is used, it can cause damage to the engine and emission control systems, resulting in increased emissions and potential fines. By following the instructions for the use of National VI models and regularly maintaining the vehicle, the crane operator can ensure that the vehicle operates safely and efficiently while minimizing environmental impact.
In conclusion, the use of National VI models requires careful attention to the choice of oils and fluids and the maintenance of filtration systems. By following the instructions provided in this article, vehicle owners and operators can ensure the proper functioning and longevity of their vehicles while meeting emission standards and protecting the environment.
