If the three-way catalytic converter is broken, it will not affect the starting of the car, nor will it affect the normal use of the engine. The three-way catalyst is only a honeycomb-like filter installed on the exhaust pipe. The main material is ceramic, which has a lot of rare metals inside to form a filter for the exhaust gas. So the price is more expensive. Because there is no filtering effect, the tail gas is also normal. Because the toxic gas such as sulfur dioxide is not filtered. The exhaust gas discharged in this way is very unfavorable to the environment and is not environmentally friendly. Therefore, it is recommended that you go to the 4S shop to check and clean out the three-way catalytic residue. Also check the engine and replace the three-way catalyst. No three-way catalytic car can be used normally. There is no way to pass the annual review.
The three-way catalytic converter is the most important off-board purification device installed in the exhaust system of automobiles. It can convert harmful gases such as CO, HC and NOx emitted from automobile exhaust into harmless carbon dioxide, water and oxidation through oxidation and reduction. Nitrogen. When the high-temperature automobile exhaust passes through the purification device, the purifying agent in the three-way catalytic converter will enhance the activities of the three gases CO, HC and NOx, and cause it to undergo a certain oxidation-reduction chemical reaction, in which CO is oxidized at a high temperature to become Color, non-toxic carbon dioxide gas; HC compounds are oxidized to water (H20) and carbon dioxide at high temperatures; NOx is reduced to nitrogen and oxygen. The three harmful gases become harmless gases, allowing the car exhaust to be purified. Since this catalyst can simultaneously convert three main harmful substances in the exhaust gas into harmless substances, it is called ternary.
The three-way catalytic converter is the most important external purification device installed in the exhaust system of the automobile. It will affect the annual review, fuel consumption, power, exhaust and many other aspects of the car. The following details:1. Exhaust gas emission exceeds the standard
This is a good understanding, the three-way catalytic converter is blocked, and harmful gases such as CO, HC and NOx are directly discharged, and definitely exceed the standard.
2. Increased fuel consumption
Blockage of the three-way catalyst will affect the normal operation of the oxygen sensor, which will affect the accuracy of the oxygen sensor signal received by the engine, so that the fuel injection, intake and ignition can not be accurately controlled, and the fuel consumption is increased.
3, poor exhaust, power reduction
This is more obvious in turbocharged models. When the three-way catalytic converter is clogged, when high-pressure exhaust is required, the exhaust gas is not smooth due to the blockage, which affects the intake air amount, which in turn causes the engine power to drop, and then the power is reduced. Refueling is weak, and running will have a feeling of incompetence. In this respect, the power is reduced at this time, in order to obtain the same power output, the driver will definitely increase the throttle, which will also lead to increased fuel consumption.
4, engine shake, fault light is on, often stalled
When the three-way catalytic converter is severely blocked, it is inevitable that the exhaust gas will be exhausted in time, and the back pressure will inevitably be reversed. When the pressure exceeds the pressure value discharged from the engine, the engine will be shaken and gasped until the flame is extinguished.
5, spontaneous combustion
The normal working temperature of the three-way catalytic converter is generally 400-800 ° C. Once blocked, the exhaust gas is affected, and the high-temperature gas is concentrated, which causes the three-way catalytic converter and the exhaust pipe to continuously heat up. When the temperature rises to the ignition point of the adjacent component or there is relative The easily lit object touches the red exhaust pipe, so it is easy to spontaneously ignite.
1. Low fuel quality and poor oil quality
China's automobile emissions are currently subject to Euro 2 standards. Euro 2 standard fuels require octane ratings of 91, 95, and 98, while China has only 90, 93, and 97 gears, all lower than Euro 2 standard fuel. In 2004, China's Technical Supervision Bureau conducted a quality inspection on the Beijing gas station, with a pass rate of only 50%, of which the Sinopec gas station qualified rate was 71%. The fuel with low label and poor oil quality will adsorb on the surface of the three-way catalyst due to incomplete combustion, forming a chemical complex, which will invalidate the ternary poisoning for a long time. Experiments show that after the low-grade, poorly-oiled fuel is added to the Euro 3 standard high-end car, the fault light indicates that the exhaust gas exceeds the standard ternary failure signal after driving for several hundred kilometers.
2. High fuel sulphur content
The Euro 2 standard fuel requires a sulfur content of less than 0.05%. At present, the high-sulfur oil produced in the Middle East has not been able to meet the environmental standards of Japan, the United States and Europe, and most of it has been sold to China. The high sulfur content of China's fuel oil has caused the attention of the United Nations Environmental Protection Agency. The fuel with high sulfur content can cause carbon deposits in the nozzle, deposits in the intake system, and chemical complexes on the surface of the three-way catalytic converter. Attached. According to the research data, after 150 hours of operation with 0.15% sulfur fuel, the power decreased by 10.5%. When the fuel was operated with 0.723% sulfur, the power decreased by 28% and the fuel consumption increased by 12.2%. The large amount of sulfur in the fuel is the main reason for the failure of the three-way vehicle in China. Sulfur adsorption on the surface of the oxygen sensor and the three-way catalyst, the formation of chemical complexes not only cause ternary poisoning failure, but also bring a series of problems to automotive power.
3, road congestion is serious
Due to the restrictions of living and working environment, most of China's private cars are driving in cities, and urban road congestion is a common phenomenon. Road congestion and opening and stopping will cause the fuel to burn incompletely and produce a large amount of carbon monoxide. It is easy to adsorb on the active surface of the ternary catalyst and cause ternary poisoning failure. Therefore, the long-term driving of the vehicle under low speed, acceleration and deceleration is also caused by ternary. The main cause of failure.
Due to poor fuel quality, high sulfur content and urban road congestion, this will result in a short service life and easy poisoning failure of the three-way purifier. Fortunately, this poisoning failure is reversible, and the sulfur, phosphorus, and carbon monoxide chemical complexes can be removed under a certain high temperature oxidation environment, and the three-way catalyst can resume activity. The ternary cleaning and maintenance products and technologies are developed based on this principle. The principle is that after the ternary cleaning agent enters the combustion chamber of the engine through the intake vacuum tube, a large amount of active oxygen ions are generated, and a high temperature is established inside the three-way catalytic converter. Strong oxidizing environment. By chemical reaction, the sulfur, phosphorus, carbon monoxide chemical complex and carbonaceous deposit on the surface of the three-way catalyst are discharged into sulfur dioxide and carbon dioxide gas, thereby achieving the purpose of cleaning the ternary and recovering the ternary activity.
Since the ternary cleaning agent is a strong polar solvent, it has a strong dissolution and cleaning effect on the fuel injection nozzle and the carbon deposit of the intake valve. At the same time as cleaning the ternary, the injector and the intake air are cleaned to some extent. System, so cleaning ternary maintenance is a comprehensive cleaning and maintenance of the fuel system. Compared with other cleaning and maintenance methods, it has obvious effects on reducing exhaust emissions, improving power and reducing fuel consumption.
Although the three-way catalytic converter used in China is prone to failure, its exhaust gas purification function can be restored by cleaning and conventional curing. Therefore, as long as regular and regular cleaning and routine maintenance, the service life of China's three-way catalytic converter will exceed that of foreign countries.
Longkou Libo Insulating Material Co.,Ltd. , https://www.liboinsulation.com