Aftertreatment structure and system suitable for natural gas engines

Abstract

The invention discloses an aftertreatment structure and system suitable for a natural gas engine, comprising a first end cover connected to each other, a first partition, a rectifying plate, a second partition, a three-way catalytic converter, an intake pipe, and a third partition plate, a fourth partition, an air outlet pipe, a second end cover, and a post-processor tail pipe; the second partition has a first perforation and a second perforation, the third partition has a third perforation and a fourth perforation, and the first There is a fifth perforation on the four partitions, and a sixth perforation on the second end cap; the first end of the air outlet pipe passes through the sixth perforation, the fifth perforation, the third perforation and the first perforation in sequence; the three-way catalytic converter The first end passes through the fourth through hole and the second through hole in sequence. The engine aftertreatment system includes the above aftertreatment structure applicable to natural gas engines. The post-processing structure and system provided by the present invention can reduce the airflow and exhaust noise of the engine, and improve the user's driving experience.

Description

technical field [0001] The invention belongs to the technical field of noise reduction of after-processors of 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 in China Phase VI 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 energy conservation, emission reduction and green manufacturing in the industry. [0003] At present, because the natural gas engine of commercial vehicle itself has higher exhaust flow rate and exhaust temperature than diesel engine, and the maximum speed is much higher than that of diesel engine, resulting in larger airflow noise in the post-processor of natural gas engine, and conventional post-processing is used. The structure of the device cannot solve this airflow noise, and the user's subject...

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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 device structure cannot solve the airflow noise, the user's subjective experience is poor, and it cannot meet the requirements of national noise regulations

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