In January of this year, with the issuance of Notice No.4 of 2016 by the Ministry of Environmental Protection and the Ministry of Industry and Information Technology, the "Five Five" era that has a profound impact on the automobile industry is coming. According to the oil upgrading process, China will implement the fifth phase of the national vehicle emission standards in sub-regions, that is, the "National Five" standard. Among them, all the 11 provinces in eastern China have to comply with the requirements of the national standard 5 since April 1. All light gasoline vehicles, light diesel passenger vehicles and heavy-duty diesel vehicles (only for public transport, sanitation and postal purposes) imported, sold and registered shall meet the requirements of the national standards. As of January 1, 2017, all light gasoline vehicles, heavy diesel vehicles (only for public transport, sanitation and postal purposes) that are manufactured, imported, sold and registered must meet the requirements of the national standards. As of July 1, 2017, all diesel gasoline vehicles manufactured, imported, sold and registered must meet the requirements of the national standards. Since January 1, 2018, all light-duty diesel vehicles that are manufactured, imported, sold and registered in our country shall meet the standards of the fifth nation. How to achieve the fifth emission standards? Compared with the fourth national emission standard, the national emission standard limits the emission of nitrogen and oxygen by 25% -28%, and the emission limit of particulate matter is strictly 82%. Under the premise of energy saving and emission reduction becoming a general trend, in addition to the development of new energy vehicles, the trend of switching from gasoline to diesel is obvious. Diesel engines, which save fuel by 30% and carbon dioxide emissions by 30% -45% compared with gasoline engines, The development of the automotive industry has become an important direction of development. However, diesel engine emissions are also facing difficulties: exhaust emissions from the engine through the exhaust tube of particulate matter, nitrogen oxides and other emissions on the atmospheric environment is still more serious pollution, whether there is a way to make its emissions to a minimum and in line with environmental protection and the country Five emission standards even higher standard requirements? The answer is yes. In the face of the most stringent national emission standards, exhaust emissions must be controlled by a combination of exhaust aftertreatment technologies. At present, there are two ways to achieve the fifth emission standard for diesel engines: First, SCR technology, by optimizing fuel injection and combustion process, control the production of particles, the combustion temperature increases, thereby increasing NOx, and then add urea to reduce NOx. Second, the EGR + DPF technology, which is actually a process of exhaust gas recirculation, reduces the temperature of the combustion by suppressing the generation of NOx and reduces the temperature of the combustion by using a DOC (Diesel Oxidation Catalyst) or a DOC + DPF (Particle Trap) ) Below the emission standard. Comparison of two technical routes SCR and DPF are actually the two main technical routes of post-treatment of diesel engine exhaust at present, each of which has its own advantages and disadvantages. In terms of performance, in the case of DPF, exhaust gas passes through the DPF system, resulting in increased exhaust back pressure and severe power losses. The SCR system due to exhaust back pressure is small, strong power output. For example, the DPF system needs to compensate for the power loss caused by EGR to achieve the emission of the national five-year plan and more two-stage supercharging. Because of its simple structure, the SCR system achieves the same emission standards as that of the third national booster system. 1. Clean the dirt on the surface in time Leather Care,Leather Products Care Cream,Leather Shine Conditioner,Shoe Polish Kit Set Jiangyin yinghuameng Houseware Co.,Ltd. , https://www.yhmcarcare.com
No matter leather shoes or leather clothes, they will be contaminated with dirt and dust as long as they are used. Therefore, they must be cleaned up every day after use. This can also prevent some dirt from staying on the leather for a long time, making it more difficult to clean the leather. When cleaning the surface, white vinegar can be used to mix with water, and then a cloth can be dipped on the leather to wipe off dirt and dust. If the dirt is serious and there is no proper detergent around, please send it to a professional organization for maintenance immediately.
2. Choose the right leather oil
If it is made of genuine leather, you can choose natural animal oil, such as mink oil or salmon nourishing oil, which can help maintain leather. Different brands of animal oil have different absorption and ductility. For example, mink oil is cheap and easy to use, but it is difficult to push evenly, and the absorption effect is poor. In addition, it is not recommended to choose leather oil containing wax. Although it will be very shiny when smeared, excessive wax will affect the air permeability and shorten the life of leather.
3. Small wear can be repaired naturally
If there are some small scratches on the leather, you can use your fingertips, palms or cotton cloth to gently and slowly wipe, dip a little leather oil, and push along the scratches to slowly eliminate the small scratches.