What is the latest automobile exhaust treatment technology at present?

What is the current automobile exhaust treatment technology? Putting forward this problem itself is a vague and chaotic problem, and the car itself is a complex and huge system engineering. Simply put, there are gasoline vehicles with gasoline engines and diesel vehicles with diesel engines in terms of power modes. The tail gas produced by its fuel is very different. The tail gas produced by gasoline engine and gasoline vehicle fuel is CO, (carbon monoxide) HC (hydrocarbon) and NOχ (nitrogen oxide); Diesel fuel mainly produces soot particles. The former is oxygen-deficient combustion and the latter is oxygen-enriched combustion. The content and method of governance are completely different. According to the different parts and different names of the exhaust gas produced by the working fuel of the original gasoline vehicle engine, more than 300 kinds of treatment devices have been developed in the world. In the world, only Americans have developed a kind of "soot particle catcher" to treat soot particles produced by diesel engine automobile fuel. The treatment effect is very high, which can be said to be the best technical equipment in the world today. Unfortunately, its filter core is made of nearly nano-cordierite, with complex structure, thin wall of only 0.4-06mm, and good air permeability, similar to the air-permeable and water-tight Yixing teapot wall. Only oil-gas mixture is permeated, but soot particles are not permeated. It costs 2000 dollars each, which is expensive and difficult to clean. It needs special tools and professionals from professional factories to clean, and the cleaning price is also high. Short working hours, full load of 8 hours will be covered with soot particles, blocking the passage and unable to work. Installation can only be carried out after replacement and cleaning. Will increase the use cost. So it has not been popularized so far. When it comes to the quality of exhaust gas treatment of gasoline vehicles, first of all, it depends on whether it can meet the prescribed treatment standards of different levels implemented in different periods. For example, the 93 standard stipulated by the state in the past is the current national I standard, that is, 40-50% of pollutants emitted by the whole vehicle; As a national II standard, it corresponds to the European I standard, that is, 50-60% of the pollutants emitted by the whole vehicle; As a national III standard, corresponding to the European II standard, vehicles are required to emit 60-70% pollutants; At present, the national IV standard implemented in Beijing and Shanghai corresponds to the European III standard, which stipulates that the whole vehicle emits 70-80% pollutants; At present, the Euro IV standard being implemented by the United States and Europe is 80-90% of the pollutants emitted by the whole vehicle; Private enterprises in China installed on Japanese cars were commissioned by Taiwanese businessmen to develop automobile exhaust reburning tanks. The Japanese scroll engine and international standard three-way catalytic converter reached the Euro V standard, 90-95%. However, more than 300 kinds of gasoline vehicle exhaust gas treatment devices developed abroad all have specific names of pollutants in the corresponding parts. The highest emission efficiency of most pollutants is 5%, and most of them are below 3%. Among the 300 devices, 7 devices can achieve the treatment effect of more than 10% of pollutants discharged by the whole vehicle. Known as the most traditional, classic and completely textbook equipment, it has the highest governance effect. They are 1, and the treatment effect of the first developed activated carbon tank from qualified products to high-quality products is15-20% of the pollutants discharged by the whole vehicle; The control effect of the activated carbon tank loaded by Ford Motor Company 1987 is 25%. 2. The control effect of the positive crankcase ventilation metering valve, namely PCV valve, is 35-40%. 3. And the outdoor fresh air breathing compensator designed for PCV valve, that is, the ventilation and inhalation device. The control effect of vehicle emission pollutants is10-15%; These two devices 2 and 3 are designed and cast in the engine, and the total treatment efficiency is 45-55%; 4. Exhaust gas circulates in the combustion device, and the pollutant emitted by the whole vehicle is10%; The four-piece device converts unburned waste gas into waste gas by discharging it into the exhaust manifold before or after combustion in the engine, and the oil-gas mixture mixed with unburned and unburned gas returns to the cylinder for secondary combustion, so as to make it burn cleanly and achieve the purpose of treating waste gas to the maximum extent. This is the cleanest and most effective way of governance; The other 5, secondary oxygen supply device, the treatment efficiency is10% of the pollutants discharged by the whole vehicle; 6. The thermal reactor works together with the secondary oxygen supply device, and the total treatment efficiency of the two devices is15%; 7. Three-way catalytic converter, I mean the international standard three-way catalytic converter, which is called the representative of the highest technology in the contemporary era. The treatment efficiency is10-15%; None of them can meet the above Euro I to Euro IV standards, let alone Euro V standards. They all need to be used together to meet any international standards. The automobile exhaust reburning tank commissioned by Taiwanese businessmen and developed by domestic private enterprises is a series of devices. They transplanted the first four devices with reburning function, which were designed and cast in the engine earlier, from the engine to the outside of the engine, and adopted the method of treating internal diseases from the outside, transforming the deformation to the point where only the functional effect was retained and the embryonic form was not seen, and then designed them one by one into an improved Ford activated carbon tank loaded in 1987, and developed the reburning tank. In particular, they designed two sets of oil-gas-water separation and decomposition devices installed at the top and bottom of the activated carbon tank. The quantitative timing control valve box installed at the top of the activated carbon tank designed by them is completely different from the activated carbon tank, and the tail gas is quantitatively and regularly controlled to be fed into the cylinder for reburning treatment to achieve the best treatment effect. It can solve most of the problems of "sudden drop of cylinder temperature, flameout and reburning difficulty" caused by the coexistence of three series of exhaust cycles designed outside China of combustion device for many years. The treatment efficiency of pollutants discharged by the whole vehicle reaches 70-80%; Finally, when they infiltrated their own "aerospace combustion-supporting and explosion-proof additives" into granular activated carbon particles, the volume expanded by 6-8 times within 72 hours, and the treatment effect reached 85-90% of the pollutants discharged by the whole vehicle, that is, the Euro IV standard. When used in combination with the international standard three-way catalytic converter, the treatment effect can reach the Euro V emission standard. It is the treatment device with the highest treatment effect at present, and has obtained the environmental protection certification of RAB Europe in the United States. The highest patented treatment device and technology won the gold medal in the 4th China International Patent and Famous Brand Expo.