After-treatment structure and system suitable for natural gas engine

Abstract

The invention discloses an after-treatment structure and system suitable for a natural gas engine. The after-treatment structure comprises a first end cover, a first partition plate, a rectifying plate, a second partition plate, a three-way catalyst, a gas inlet pipe, a third partition plate, a fourth partition plate, a gas outlet pipe, a second end cover and an after-treatment device tail pipe which are connected with one another. The second partition plate is provided with a first through hole and a second through hole, the third partition plate is provided with a third through hole and a fourth through hole, the fourth partition plate is provided with a fifth through hole, and the second end cover is provided with a sixth through hole. The first end of the gas outlet pipe sequentially penetrates through the sixth through hole, the fifth through hole, the third through hole and the first through hole. The first end of the three-way catalyst sequentially penetrates through the fourth through hole and the second through hole. The engine after-treatment system comprises the after-treatment structure suitable for the natural gas engine. According to the after-treatment structure and system, the airflow exhaust noise of the engine is reduced, and the driving experience feeling of a user is improved.

Description

technical field [0001] The invention belongs to the technical field of after-processor noise reduction for commercial vehicles, and in particular relates to an after-treatment structure and system suitable for natural gas engines. Background technique [0002] As the application of gas engines for commercial vehicles at the National VI stage has become the focus of the industry, the number of natural gas heavy trucks in the market will continue to increase, serving as the backbone of the industry's energy conservation, emission reduction and green manufacturing. [0003] At present, due to the higher exhaust flow and exhaust temperature of commercial vehicle natural gas engines than diesel engines, the maximum speed is also much higher than that of diesel engines, resulting in greater airflow noise in the post-processor of natural gas engines, and conventional post-processing The structure of the device cannot solve the airflow noise, the user's subjective experience is poor...

AI Technical Summary

Problems solved by technology

[0003] At present, due to the higher exhaust flow and exhaust temperature of commercial vehicle natural gas engines than diesel engines, the maximum speed is also much higher than that of diesel engines, resulting in greater airflow noise in the post-processor of natural gas engines, and conventional post-processing The structure of the device cannot solve the airflow noise, the user's subjective experience is poor, and it cannot meet the requirements of the national passing noise regulations

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