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After-treatment device for diesel engine

A post-processing device and diesel engine technology, applied in the direction of mufflers, exhaust devices, mechanical equipment, etc., can solve problems such as engine failure and blockage of exhaust pipes, achieve unobstructed exhaust pipes, improve anti-crystallization ability, and avoid engine failures Effect

Inactive Publication Date: 2018-01-09
GUANGXI YUCHAI MASCH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are often urea crystals on the pipeline of the blue pipe, which can block the exhaust pipe and cause serious engine failure

Method used

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  • After-treatment device for diesel engine

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Embodiment Construction

[0010] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0011] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0012] Such as figure 1 As shown, a diesel engine aftertreatment device according to a specific embodiment of the present invention includes: a catalytic muffler 1 and a supercharger 2, the supercharger 2 is connected to the catalytic muffler 1 through an exhaust pipe, and the exhaust pipe includes a mixing pipe 31 , the first curved pipe 32, the rear straight pipe 33, the second curved pipe 34 and the front straight pipe ...

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Abstract

The invention discloses a post-processing device for a diesel engine, which comprises a catalytic muffler, a supercharger and an exhaust pipeline connection. A mixer is formed, the wall of the mixing tube is obliquely provided with nozzles; the first elbow is connected with the catalytic muffler, the first elbow bends upwards, and the length of the first elbow is greater than 2.5 times the diameter of the mixing tube; the rear straight Pipe, which connects the first elbow and the mixing pipe, the length of the rear straight pipe is greater than 2 times the diameter of the mixing pipe, and the diameter of the rear straight pipe is consistent with the diameter of the mixing pipe; the second elbow, which is connected to the supercharger Connection, the turning radius of the second elbow is greater than the diameter of the mixing pipe; and the front straight pipe, which connects the second elbow and the mixing pipe, the length of the front straight pipe is greater than 1.5 times the diameter of the mixing pipe, and the length of the front straight pipe is The diameter corresponds to the diameter of the mixing tube. The device improves the anti-crystallization ability of urea.

Description

technical field [0001] The invention relates to the field of diesel engine exhaust aftertreatment, in particular to a diesel engine aftertreatment device. Background technique [0002] In the post-treatment of diesel engine exhaust, the SCR scheme has obvious advantages in the national IV diesel vehicle exhaust emission treatment system, and urea (Tianlan) for vehicles is a necessary additive for the SCR scheme. Tianlan pipe is a pipeline connecting Tianlan tank, metering jet pump and nozzle for Tianlan to flow inside the system. At present, there are often urea crystals on the pipeline of the blue pipe, which can block the exhaust pipe and cause serious engine failure. [0003] The information disclosed in this Background section is only for enhancing the understanding of the general background of the present invention and should not be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28F01N13/08
Inventor 黄第云沈捷黄永仲李伟
Owner GUANGXI YUCHAI MASCH CO LTD
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