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SCR after-treatment packaging structure for diesel engine

A diesel engine and packaging structure technology, which is applied in the direction of engine components, machines/engines, and mufflers, can solve problems such as engine failure, engine exhaust back pressure rise, and fuel economy decline, so as to save muffler components , the effect of improving the mixing effect and reducing the cost of the whole vehicle

Active Publication Date: 2016-01-20
ANHUI QUANCHAI ENGINE
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Problems solved by technology

However, in the use of SCR post-treatment, due to the uneven mixing of the urea solution and the exhaust gas in the exhaust pipe, the crystallization of the urea solution in the urea pipe occurs from time to time. This fault will increase the exhaust back pressure of the engine, reduce fuel economy, and cause serious faults. The engine will not run normally, or even shut down

Method used

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  • SCR after-treatment packaging structure for diesel engine
  • SCR after-treatment packaging structure for diesel engine
  • SCR after-treatment packaging structure for diesel engine

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] Please also refer to figure 1 and figure 2 , The SCR post-treatment packaging structure for a diesel engine in this embodiment includes an injection connecting pipe 1 , a mixer 2 , a muffler 3 , a post-treatment 4 , a urea injector mount 5 , and a muffler barrel 6 . The spray connecting pipe 1, the muffler 3, and the aftertreatment 4 are connected sequentially, the mixer 2 is arranged in the spray connecting pipe 1, the urea injector mount 5 is arranged on the spray connecting pipe 1, and the silencer 3 is installed in the spray connecting pipe 1 with On one end of the mixer 2, the aftert...

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Abstract

The invention discloses an SCR after-treatment packaging structure for a diesel engine. The SCR after-treatment packaging structure for the diesel engine comprises an injection connecting pipe, a mixer, a silencer and a urea injector installation seat. The mixer is arranged in the injection connecting pipe. The urea injector installation seat is arranged on the injection connecting pipe. The silencer is installed at the end, with the mixer, of the injection connecting pipe. The mixer, the silencer and the like are integrally designed and the installation position of the mixer is located at an intersection of the center line of the urea injector installation seat and the injection connecting pipe. In the direction of the center line of the injection connecting pipe, multiple blades of the mixer are distributed on the left side and the right side, the angle of each blade is 60 degrees, and the blades are welded into the injection connecting pipe. By the adoption of the SCR after-treatment packaging structure for the diesel engine, the problem that a urea aqueous solution is crystallized in a vent pipe of a selective catalytic reduction (SCR) after-treatment system can be solved.

Description

technical field [0001] The invention relates to the technical field of aftertreatment of diesel engines, in particular to an SCR aftertreatment package structure for diesel engines. Background technique [0002] At present, the implementation of emission regulations is becoming more and more stringent. In the national IV and V emission stages, after-treatment technology is widely used. In use, after-treatment not only plays the role of reducing pollutants, but also plays the role of effector. [0003] To reduce nitrogen oxide emissions, SCR post-treatment will be widely used, SCR refers to SelectiveCatalyticReduction, selective catalytic reduction method. However, in the use of SCR post-treatment, due to the uneven mixing of the urea solution and the exhaust gas in the exhaust pipe, the crystallization of the urea solution in the urea pipe occurs from time to time. This fault will increase the exhaust back pressure of the engine, reduce fuel economy, and cause serious faults...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28F01N1/08
Inventor 管金彪汪志义李敏
Owner ANHUI QUANCHAI ENGINE
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