Motor vehicle exhaust purifying device

Abstract

The invention discloses a motor vehicle exhaust purifying device, and belongs to the field of motor vehicle exhaust emission reduction. The motor vehicle exhaust purifying device comprises a purifying ejector, a purifying chamber and a purifying tank (27) for providing purifying matter for the purifying chamber. The purifying tank (27) is communicated with an adsorption cavity (2) of the purifying ejector, the input end of the purifying ejector is connected with an engine exhaust pipe, the output end of the purifying ejector is connected with a gas inlet channel (10) of the purifying chamber, the interior of the purifying chamber is divided by partition plates into a plurality of purifying cavities, the purifying cavities are communicated through inner cavity channels, and exhaust enters the purifying chamber through the gas inlet channel (10) and circularly flows in the purifying cavities to be purified to be emitted out through a gas outlet channel (11). The motor vehicle exhaust purifying device has the advantages that zero emission of exhaust harmful substance is achieved, the power of an engine is further improved, the combustion efficiency and the fuel economy are improved, and cost is low.

Description

Technical field [0001] A motor vehicle exhaust purification device belongs to the field of motor vehicle exhaust emission reduction. Background technique [0002] The three-way catalytic converter is a filtering device shaped like a "honeycomb coal". It is installed after the exhaust manifold of a motor vehicle engine. The three-way catalytic converter does not have the catalytic ability at room temperature. The catalyst must be heated to a certain temperature before it can be oxidized or reduced. Capacity, usually the reaction temperature of the three-way catalytic converter is 250~350℃, and the normal working temperature is generally 350~700℃. When the temperature exceeds 850~1000°C, the catalyst in the inner coating is likely to fall off and the carrier may break. [0003] The catalyst is very sensitive to elements such as sulfur, lead, phosphorus, and zinc. Sulfur and lead come from gasoline, while phosphorus and zinc come from lubricating oil. These four substances and the ox...

AI Technical Summary

Problems solved by technology

[0004] When the car works at low temperature for a long time, the three-way catalytic converter cannot be started, and the soot from the engine exhaust pipe will adhere to the surface of the catalyst, making it impossible to contact with CO and HC compounds. After a long time, the pores of the carrier will be blocked. affect its conversion efficiency

In addition, the exhaust emission is not smooth, and the power of the engine is difficult to exert, which is also the reason why many cars cannot run at high speed.

[0005] The tail gas of the existing tail gas purification device directly enters the liquid reducing agent, the contact time between the tail gas and the reducing agent is short, the reaction is not sufficient, the purification effect is poor, and the discharged tail gas still contains a large amount of CO and NO2, and the tail gas will reduce all the Reductant pollution, the service life of the reducing agent is very short, and the reducing agent needs to be replaced regularly to ensure the purification effect, resulting in very high cost of use, and it is inconvenient to replace the reducing agent

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