Automobile exhaust treatment device

Abstract

The invention discloses an automobile exhaust treatment device, and belongs to the technical field of environmental protection equipment. According to the technical scheme, the automobile exhaust treatment device is characterized by comprising a shell internally provided with a heat preservation interlayer and a catalyst carrier arranged in the shell, wherein the catalyst carrier is divided into aplurality of blocks by circulation gaps, and a fixing sleeve communicating with the circulation gaps is assembled at the axis of the catalyst carrier. A control sleeve directly conveys exhaust to themiddle and lower reaches of a catalyst through commnuicating holes, the distance of part of the exhaust penetrating through the catalyst gaps is shortened, and the exhaust resistance is reduced; meanwhile, the amount of harmful pollutants making contact with catalysts at different positions is relatively uniform, and the conversion strength is relatively consistent; when the temperature is too high, an ECU controls a telescopic piece to contract, thus part of the exhaust is directly exhausted through an exhaust opening, the strength of the oxidation reaction in the catalyst is reduced, and the temperature in the catalyst is controlled; and when the blocking pressure in a three-way catalyst is too large, the control sleeve moves, part of the exhaust is directly exhausted, and the pressureof the exhaust end of an engine is reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental protection equipment, and in particular relates to an automobile exhaust treatment device. Background technique [0002] Air quality affects the quality of life and health of human beings. Air pollution control is getting more and more attention. At present, the most effective means of air pollution control is to control from the source. Motor vehicle exhaust is a relatively large source of air pollution. In order to reduce the For the emission of harmful gases in the exhaust, a three-way catalytic converter is installed in the middle of the exhaust pipe of the starter car to oxidize or reduce the harmful gases HC, CO and NOX in the exhaust to harmless gases such as H2O, CO2 and NO2. [0003] Such as figure 1 , the existing three-way catalyst carrier is linearly distributed along the exhaust direction. On the one hand, the carrier will cause certain obstacles to the exhaust gas, and the exh...

AI Technical Summary

Problems solved by technology

[0003] like figure 1 , the existing three-way catalyst carrier is linearly distributed along the exhaust direction. On the one hand, the carrier will cause certain obstacles to the exhaust gas, and the exhaust pressure at the engine end will increase. In order to maintain the best air-fuel ratio, the engine intake end needs Increase the suction, resulting in a certain energy loss. On the other hand, the end of the catalyst close to the engine contacts more pollutants, and its conversion intensity is greater than that of the end far away from the engine. At the same time, the catalyst will release more heat when converting pollutants, far away from the engine. One end gathers the upstream temperature, causing its temperature to be higher than that of the end close to the engine. The conversion intensity of different positions in the catalytic converter is different, and the service life of the catalysts in each place is quite different, which reduces the overall service life of the catalytic converter.

[0004] The engine's working conditions are different, and the components of the exhaust gas are different. When the CO and HC components in the exhaust gas are high, excessive oxidation reactions will occur in the catalytic reactor, and a large amount of heat generated by the oxidation reaction will cause the catalytic reactor to be overheated and damaged. In severe cases, the car will even be ignited, causing loss of life and property. Secondly, when the three-way catalytic converter is damaged, it will not affect normal driving. Some car owners will not replace it. The exhaust gas that has not been treated by the three-way catalytic converter will pollute the air. More serious, increasing the difficulty of air pollution control

[0005] After the three-way catalyst is used for a long time, it will be deactivated and cause a large blockage, which will affect the normal exhaust of the engine, further affect the combustion rate in the engine, increase the energy consumption of the engine, and at the same time increase the harmful substances in the exhaust gas and increase air pollution.

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