What is the speed limit and torque limit? Which part has a problem?

In today's trucks, many models of Baotou North Mercedes-Benz accessories are equipped with after-treatment particulate traps, which we often call DPF(DieselParticulateFilter). Like the filter cotton in a vacuum cleaner, it can collect soot, carbon powder and other particles in the engine exhaust.

When the soot toner is full, the vehicle needs DPF regeneration. Whether it is passive regeneration during driving or active regeneration stopped, it is a way of burning carbon powder at high temperature and converting it into carbon dioxide to be discharged out of the car. If it can't be cleaned, the DPF will be blocked over time, the vehicle may twist at the speed limit, or the engine may be bored due to poor exhaust. Therefore, the speed-limiting twist of the vehicle is likely to be a problem of DPF.

Where does DPF blockage come from? Why doesn't regeneration work?

Under normal circumstances, the carbon ash produced after diesel combustion accumulates in DPF. When the vehicle is running at a high speed, the high temperature exhaust of the engine will make the carbon ash burn into carbon dioxide. When passive regeneration is ineffective, the vehicle can run at high speed in situ to enhance the exhaust temperature and clean carbon ash. But there is a kind of exhaust gas particle, and DPF regeneration is ineffective.

Today's engine, in order to ensure a long working time and good working effect, Baotou North Mercedes-Benz parts manufacturer will carry out fine grinding treatment inside the cylinder. During the grinding process, a fine mesh pattern will be carved inside the cylinder. These mesh patterns are used to retain oil and enhance lubricating performance.

When the cylinder burns, the oil in the mesh line will be heated and burned immediately, and this part of the oil may produce some gray particles and be discharged together with the exhaust gas. As all my friends know, there are basic oils and additives in the composition of oil. These additives inevitably contain some metal components, which will also lead to ash from oil combustion, some of which cannot be treated by combustion, and these components can only be left in post-treatment.

How to solve the post-treatment blockage?

In the face of DPF blockage caused by this situation, we usually can only choose to replace the DPF or disassemble and clean it manually. But as the saying goes, it is better to prevent it in advance than to make up for it. In fact, in the process of vehicle maintenance, as long as a little attention is paid to deal with the congestion problem, it can be greatly reduced or even avoided.

The solution is simple. We will solve it from where the ash in DPF comes from. The use of low ash oil can undoubtedly reduce the generation of soot in the tail gas, thus reducing the blockage of DPF. This is also highly recommended by many manufacturers.

When it comes to engine oil, I believe anyone will think of a yellow shell logo. Yes, Shell, which most people remember about engine oil, also has Shell suitable for National No.5 and National No.6 trucks. CK-4 engine oil. In addition, the engine oil also adopts the formula of fully synthetic base oil, low sulfur, low phosphorus and low ash.

Take Shell Jinba K10 engine oil as an example. The engine oil adopts the formula of fully synthetic base oil, low sulfur, low phosphorus and low ash. How are these formulas understood? With low sulfur content, oil is not easy to be acidified prematurely, and its protection period and protection ability are longer. Similarly, phosphorus may also cause corresponding problems.

In addition, the low ash formula is important. The engine oil with low ash content can produce less ash in the combustion process, so that less incombustible ash can enter DPF. In this way, our DPF is not prone to problems. In addition, Shell Jinba's fully synthetic CK-4 engine oil is also compatible with Guowu vehicles, which brings good protection to the engine and 100,000 kilometers of oil change mileage.

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