According to the requirements of current regulations, when a vehicle breaks down, Euro 5 and Euro 6 models will have significantly different performance.
The National V model will usually not have the torque limit until 36 hours after the vehicle fails, and the speed limit will not appear.
The requirements for new Euro VI vehicles are more stringent. When the vehicle fails 10 hours later, the torque limit fault will appear. If the driver ignores the fault and allows it to develop, then the vehicle will behave 20 hours after the fault occurs. There is a speed limit phenomenon.
Generally speaking, when the vehicle fails, the relevant indicator lights are displayed very clearly on the combined instrument.
When the exhaust emission failure lamp (MIL lamp) is on, the driver should perceive that the vehicle exhaust treatment system may be malfunctioning, but the vehicle will not have a torque reduction failure at this moment.
Only when the engine torque down indicator (DWS light) is on, the vehicle will have limited torque or even speed limit performance. At this time, the driver needs to go to the service station to check and repair the vehicle as soon as possible, otherwise it may affect the whole The reason for the car.
A brief introduction to the role of the name of the post-processing parts
In order to make it easier for the card friends to check and repair the vehicle, they will not be confused. Below, the editor will give a brief introduction to the names and functions of the parts and functions of the vehicle’s after-treatment system:
Compared with the previous National IV and National V models, the Euro VI exhaust gas treatment system has the same urea pump, urea nozzle and various pressure difference and temperature sensors. It also has more components such as DOC, DPF and mixer. .
: Diesel engine oxidation catalyst. Its main function is to oxidize CO and HC in exhaust gas and convert them into non-toxic and harmless CO2 and H2O. At the same time, it can also absorb soluble organic components and some carbon particles, and reduce some PM And oxidize NO to NO2;
: Particulate trap, it is a particulate filter, the main function is to collect PM (particulate matter) in the exhaust;
: The main function is to strengthen the mixing of exhaust gas treatment and oxygen reducing agent;
: Selective catalytic reduction technology, which is more common in the four countries and five models of the country, is the urea solution treatment exhaust system, which is used to control the nitrogen oxide content in the exhaust gas and detect whether the exhaust gas meets the standard;
Differential pressure sensor
: Used to calculate the carbon load captured by DPF;
Import and export nitrogen oxide sensor
: As the name implies, it is used to detect the content of nitrogen oxides in imports and exports;
Exhaust temperature sensor
：Detect the temperature in the exhaust gas emission system;
In addition, the Euro VI post-processing system also includes a urea pump, a urea nozzle-level urea tank, and a line speed assembly. These components are also seen on previous models and will not be detailed.
When these parts fail, the vehicle may exhibit torque limit or speed limit performance. At this stage, card friends cannot handle these problems by themselves. However, in order to reduce the damage of the above parts, the new car is under maintenance. One piece of content is what our card friends can do now.
The maintenance of Euro VI new car needs to pay attention to fuel, oil, urea and filter element.
Regarding the maintenance of Euro VI models, or the places that should be paid attention to when driving a vehicle, it is mainly reflected in four aspects: fuel, oil, urea solution and regular replacement of filter elements.
: It is definitely necessary to use standard Euro VI fuel from regular channels. Because low-grade or unqualified fuel may not only cause damage to the injector or fuel pump, but also may cause DOC or SCR poisoning, thereby causing DPF blockage;
：It is necessary to use engine oil no lower than CK-4 grade. Because the engine oil that does not meet the standard will also cause rapid blockage or failure of the DPF;
: Urea for vehicles with a concentration of 32.5%. Unqualified urea solution is most likely to cause crystal blockage of the urea nozzle; if there are more crystal lumps, it may even cause SCR blockage, which will cause greater failure to the post-processing system;
: Of course, use the qualified parts. For regular replacement of the filter element, you can refer to the following table or follow the suggestions of service personnel:
Euro 6 new cars can finally be controlled smoothly
The emergence of Euro VI new cars is indeed much more complicated than the previous vehicles, but I think that everyone does not need to worry too much. After all, from the National IV, National V, and the current new energy vehicles, everyone is also They all came here step by step.
The emergence of new technologies requires a process of digestion and assimilation. As long as we drive the vehicle in a correct and standardized way, the new Euro 6 car will not become a model that everyone is afraid of, and we will be able to master it smoothly in the end.