Low-exhaust-back-pressure catalytic silencer

By using a spherical low exhaust back pressure catalytic muffler, the problem of high exhaust back pressure in catalytic mufflers is solved, thereby improving exhaust efficiency and fuel economy, reducing exhaust back pressure, and enhancing engine reliability.

CN224260426UActive Publication Date: 2026-05-19GUANGXI YUCHAI MASCH CO LTD
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Patent Information

Application Number
CN202521077172.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-28
Publication Date
2026-05-19
Estimated Expiration
2035-05-28

AI Technical Summary

Technical Problem

Existing catalytic converters have excessively high exhaust back pressure, which leads to difficulty in exhausting the engine, increased engine temperature, accelerated wear of parts, reduced intake air volume, incomplete combustion, increased fuel consumption, and poor fuel economy.

Method used

The low exhaust back pressure catalytic muffler with a spherical structure includes a spherical intake chamber and multiple treatment layers. The treatment layers consist of a diesel oxidation catalyst layer, a diesel particulate filter layer, and a selective catalytic reduction layer. After the exhaust gas diffuses through the spherical intake chamber, it passes through these layers in sequence for treatment before finally being discharged.

Benefits of technology

It reduces exhaust back pressure, improves exhaust gas treatment efficiency, reduces exhaust back pressure by about 30%, reduces cycle fuel consumption by 2%, and improves engine reliability and fuel economy.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224260426U_ABST
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Abstract

The utility model discloses a low exhaust back pressure catalytic silencer, which belongs to the field of tail gas treatment devices and comprises an air inlet pipe, an exhaust pipe and a treatment tank arranged between the exhaust pipe and the air inlet pipe, the treatment tank is of a spherical structure, a spherical air inlet cavity is arranged at the center of the interior of a treatment device, and a plurality of treatment layers are sequentially arranged outside the spherical air inlet cavity. The air inlet pipe penetrates through the treatment tank and the treatment layer and is communicated with the air inlet cavity; the exhaust pipe is connected to the treatment tank. Waste gas is exhausted into the spherical gas inlet cavity through the gas inlet pipe, sequentially passes through the diesel oxidation catalyst layer, the diesel particulate matter filtering layer and the selective catalytic reduction layer, finally enters the treatment tank and is exhausted into the atmosphere through the exhaust pipe. The treatment tank arranged in a spherical shape and all the treatment layers are arranged in a spherical shape, waste gas diffuses from the center to all angles around when passing through all the treatment layers, the exhaust efficiency is improved, and the waste gas treatment efficiency is improved. And compared with other packaging structures, the exhaust back pressure can be reduced by about 30%, and the circulating oil consumption is reduced by 2%.
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