The three-way catalytic converter is a device used for the purification of automobile exhaust gas, which converts harmful gases in the exhaust gas (such as carbon monoxide CO, hydrocarbon HC and nitrogen oxide NOx) into harmless carbon dioxide (CO2), water (H2O) and nitrogen (N2) through a chemical reaction. Its working principle is based on the action of catalysts, usually made of precious metals (such as platinum, palladium, rhodium), which promote the REDOX reaction of harmful gases
| Material |
Stainless Steel Metal |
| Name |
Catalytic Converter |
| Size |
can be customized |
| Carrier materials |
Honeycomb ceramic coated with precious metal |
| Application |
Universal |
| Packing |
Bubble Bag + Strong Carton Box |
| MOQ |
50 |
| Warranty Service |
1years |
Why do you need to replace the three-way catalyst?
1. The temperature is too high
At room temperature, the three-way catalytic converter does not have the catalytic ability, the catalyst must be heated to a certain temperature to have the ability of oxidation or reduction, usually the catalytic converter ignition temperature is 250-350 ° C, the normal working temperature is generally 400-800 ° C. When the catalytic converter works, the higher the amount of self, the higher the oxidation temperature, when the temperature exceeds 1000 ° C, the catalyst of its inner coating will be sintered and necrotic, and it is also easy to occur vehicle spontaneous combustion accidents. Therefore, we must pay attention to the control of various factors that cause the exhaust temperature to rise, such as too late ignition time or ignition sequence disorder, fire break, etc., which will make the unburned mixture into the catalytic reactor, resulting in too high exhaust temperature, affecting the efficiency of the catalytic converter.
2. Chronic poisoning
Catalyst is very sensitive to sulfur, lead, phosphorus, zinc and other elements, sulfur and lead from gasoline, phosphorus and zinc from lubricating oil, these four substances and their combustion in the engine after the formation of oxide particles are easy to be adsorbed on the surface of the catalyst, so that the catalyst can not contact with the exhaust gas, thus losing the catalytic effect, the so-called "poisoning" phenomenon.
3. Surface area carbon
When the car works at a low temperature for a long time, the three-way catalytic converter cannot be started, the carbon smoke from the engine will adhere to the surface of the catalyst, resulting in no contact with CO and HC, and in the long run, the pores of the carrier will be blocked, affecting its conversion efficiency.
4. Exhaust deterioration
The catalytic converter has a certain limit on the conversion capacity of pollutants, so the original exhaust must be minimized by in-machine purification technology. If the concentration and total amount of the components of the discharged waste gas pollutants are too large, such as the mixture is too strong, it will affect the catalytic conversion ability of the catalytic converter and reduce its conversion efficiency. In addition, due to the large amount of HC and CO in the exhaust gas into the catalytic reactor, there will be excessive oxidation reaction in it, and a large amount of heat generated by the oxidation reaction will make the catalytic reactor too high temperature and damage.
5. Use them differently
Does not match with the engine, even if it is the same engine, the same three-way catalytic converter, the model is different, the commonly used working interval of the engine is different, the exhaust status changes, and the location of the installation of the three-way catalytic converter is different, which will affect the catalytic conversion effect of the three-way catalytic converter. Therefore, different vehicles should use different three-way catalytic converters.
6. Oxygen transfer failure
In order to achieve the optimal catalytic rate of exhaust gas (more than 90%), it is necessary to install an oxygen sensor in the engine exhaust pipe and achieve closed-loop control, the working principle is that the oxygen sensor will measure the oxygen concentration in the exhaust gas, convert it into an electrical signal and send it to the ECU, so that the air-fuel ratio of the engine is controlled in a narrow, close to the ideal area (14.7: 1) If the air-fuel ratio is large, although the conversion rate of CO and HC is slightly increased, the conversion rate of NOx is sharply reduced to 20%, so the best air-fuel ratio must be ensured to achieve the best air-fuel ratio, and the key is to ensure that the oxygen sensor works normally. If the fuel contains lead, silicon will cause oxygen sensor poisoning. In addition, improper use will also cause oxygen sensor carbon accumulation, ceramic breakage, heater resistance wire burning, internal line break and other failures. The failure of the oxygen sensor will lead to the air fuel ratio misalignment, the deterioration of the exhaust condition, the reduction of the efficiency of the catalytic converter, and the service life of the catalytic converter will be reduced for a long time
Structure of three-way catalytic converter
Three-way catalytic converters usually consist of the following parts:
• Shell: Usually made of stainless steel material to prevent the peel from falling off and causing clogging
• Vibration damping layer: consists of expansion gaskets or steel wire mesh gaskets for sealing, insulation and fixing the carrier to prevent vibration and thermal stress from causing damage to the carrier 1619
• Support: Usually a honeycomb ceramic or metal material, coated with a catalyst coating. The carrier is designed so that it has a large surface area to improve catalytic efficiency
• Catalyst coating: The main components include platinum, palladium, rhodium and other precious metals, which are evenly distributed on the surface of the carrier for promoting chemical reactions
Installation Instructions
The three-way catalytic converter is an important purification device in the automobile exhaust system, which is usually installed in the first section of the exhaust manifold drum at the front end of the exhaust system. The specific location is as follows:
1. Exhaust system front end: The three-way catalytic converter is generally located at the front end of the engine exhaust pipe, between the exhaust manifold and the muffler.
2. Bulge position: Viewed from the bottom of the vehicle, the three-way catalytic converter is usually a device similar to the shape of a long kettle, installed in the head of the exhaust pipe bulge.
3. With the oxygen sensor: the three-way catalytic converter is usually located between the front and rear oxygen sensors, working closely with them to ensure the exhaust gas purification effect.
It is important to note that not all cars have only one three-way catalyst, and some vehicles may be equipped with multiple catalysts.
Dezhou Fujiya Auto Parts Technology Co., LTD., founded in 2005, is an automotive exhaust system Co., LTD. It is a professional manufacturer that can provide a complete set of exhaust system assembly products for purification and noise reduction. Focus on vehicle exhaust control and noise control products R & D, production and sales. Annual output of 2 million sets of purification silencer assembly and 2 million sets of three-way catalytic converter. The company's products realize robot automatic welding. The company is known for high quality products and reliable performance, and its exhaust system products are suitable for a wide range of vehicle types, including passenger cars and commercial vehicles. Its products are widely sold worldwide. And with Changan Automobile, Geely Automobile, Yellow Sea Automobile and many other well-known car host manufacturers to establish long-term cooperative relations.
Payment: Payment: 30% deposit by telegraphic transfer in advance, 70% balance by telegraphic transfer in copy of Bill of lading
Payment method: sight L/C, T/T.
Packing: Bubble Bag + Strong Carton Box
1 Who are we?
Our company is located in Shandong, China. Our products began to be sold to Canada, the United States, Australia and the Middle East in 2016
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You can find the products you need according to your model. If you don't have them, you can contact us. We can produce according to the sample.
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Before production, we will purchase samples of the original vehicle for production to ensure consistent loading angle. Our raw materials for production are all standard Grade I 409 steel to ensure durability.
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