Automobile three-way catalyst

Abstract

The invention discloses an automobile three-way catalyst. The automobile three-way catalyst is provided with two carriers. The first carrier and the second carrier are each of a hollow structure and filled with aluminum oxide ceramic and a platinum, rhodium and palladium metal wire catalyst. The inner wall of the first carrier and the inner wall of the second carrier are each provided with bypass holes. By means of the automobile three-way catalyst, catalytic efficiency of the unit area is improved, and in addition, airflow uniformity is improved; the automobile three-way catalyst also plays a helpful role in flow resistance reduction; and when the carriers are blocked, most airflow is discharged into the atmosphere through the bypass holes, and thus damage, caused by backpressure increase, to an automobile is reduced.

Description

technical field [0001] The invention relates to an automobile exhaust system purification device, in particular to an automobile three-way catalytic converter. Background technique [0002] As the number of automobiles increases, its harm to the global environment is also increasing. At present, automobile exhaust pollution has become one of the most important sources of air pollution in our country. In my country, automobile emission regulations are not as sound as developed countries in Europe and the United States, and the condition of the vehicles is poor, which is twice or even more than that of similar vehicles in Europe and the United States. In big cities, there are many vehicles, traffic jams, frequent idling and frequent braking of vehicles, which aggravate the pollution of vehicle exhaust, so it is very necessary to control exhaust emissions. [0003] The automobile three-way catalytic device is the most important external purification device installed in the aut...

AI Technical Summary

Problems solved by technology

The catalytic method of the traditional three-way catalytic converter is axial catalysis. The axial catalysis is limited to the inner diameter of the cavity and the position of the carrier. The airflow is often concentrated in the axial center of the carrier, the pressure loss is large, and the flow velocity in the center of the carrier is uneven. After long-term use, the carrier of the traditional three-way catalytic converter will be blocked by some pollutant particles. Once the catalytic converter carrier is blocked, it will cause poor exhaust, increased back pressure, and a sharp rise in the temperature of the exhaust pipe

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