In the economic development, environmental pollution is becoming more and more serious. In order to protect the environment we depend on, all countries in the world adopt various environmental protection measures, including restrictions on exhaust emissions of vehicles. At present, China’s vehicle emission standards are for the national five, and some regions enter early. To the national six emission standards, many people do not understand the emission standards, because there are a lot of English abbreviations, these English abbreviations are not professionals can not understand, today, let's share this knowledge with everyone. Before we get to know these English letters, we must first know that the engine exhaust includes gaseous pollutants and particulate pollutants. Among them, gaseous pollutants are carbon monoxide, nitrogen oxides, equivalent nitrogen dioxide, hydrocarbons; hydrocarbons, particulate pollutants are mainly carbon, condensed hydrocarbons, sulfuric acid brine compounds, so to make the exhaust emissions meet the requirements For the limits, the corresponding processing devices must be installed, and these devices are usually represented by English abbreviations. DOC (Oxidation Catalytic Converter): To achieve oxidation treatment of carbon monoxide and hydrocarbons. SCR (Selective Catalytic Reduction System): Considering the corrosivity, toxicity and compulsory irritancy of ammonia, the reducing agent (urea) is used to selectively reduce nitrogen oxides to nitrogen in an oxygen-rich environment under the action of a catalyst. water. EGR (Exhaust Gas Recirculation): In order to reduce the nitrogen oxide content in the exhaust gas, the OEM has chosen to inject the exhaust gas into the engine cylinder for combustion, thereby reducing the nitrogen oxide content in the exhaust gas. Hi-SCR (Carbon Hydroxide Converter): It is mainly used in combination with SCR (Selective Catalytic Reduction System) and DOC (Oxidation Catalyst) to reduce the content of nitrogen oxides in the exhaust gas. DPF (Particle Trapper): The unoxidized particles (soot particles) in the exhaust gas are trapped in the trap, and the high-temperature combustion emits carbon dioxide which is harmless to the human body. ASC (Ammonia Oxidation Catalyst): The conversion of reducing agent (urea) to ammonia, both DOC and ASC can significantly improve the SCR conversion rate. The reason why the national six emissions are called the most stringent emissions in history, is mainly reflected in the exhaust gas NOx emission limit is 3-5 times stricter than the national five. For the beautiful environment where human beings live together, for the blue sky, white clouds and green mountains, and at the same time reduce the pollution of automobile exhaust emissions to the air, our company has now launched a variety of special vehicles for the discharge of the national six in batches. Welcome customers to consult and inspect. Special vehicle nationwide sales hotline (WeChat same number) Screw Barrel Plastic Products,Double Screw Barrel,Conical Twin Screw Barrel ,Pvc Screw Barrel Zhoushan Taisu Overseas Co Ltd. , https://www.taisuoverseas.com
