U-shaped post-processing structure
A post-processor, U-shaped technology, applied in exhaust gas treatment, mechanical equipment, engine components, etc., can solve the problems of easy urea crystallization, poor structural integration of post-processor, and difficult disassembly, etc., to avoid The effect of NOx exceeding the standard failure, avoiding limiting the output torque of the vehicle, and improving the convenience of layout
Inactive Publication Date: 2020-02-14
FAW JIEFANG AUTOMOTIVE CO
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Problems solved by technology
[0006] The purpose of the present invention is to provide a U-shaped post-treatment structure to solve the problems that the existing post-processor structure has poor integration, is not easy to disassemble, and is prone to urea crystallization when redox reactions occur.
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[0048] 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, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.
[0049] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two ...
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The invention belongs to the technical field of automobile post-processing systems, in particular to a U-shaped post-processing structure. The U-shaped post-processing structure comprises a pre-processing structure unit, a post-processing unit and an intermediate unit, wherein the pre-processing unit comprises a diesel oxidation catalytic post-processor and a diesel particulate trapper which are arranged in sequence according to a gas intake route, the post-processing unit comprises a mixer, a selective catalytic reducer and an ammonia oxidation catalyst which are arranged in sequence according to a gas outlet route, the intermediate unit is connected between the diesel particulate trapper and the mixer, the diesel oxidation catalytic post-processor is detachably connected with the dieselparticulate trapper through a first connecting assembly, the intermediate unit is detachably connected with the diesel particulate trapper and the mixer through a second connecting assembly, and the selective catalytic reducer is detachably connected with the mixer through a third connecting assembly. The U-shaped post-processing structure has the beneficial effects that large integration is achieved, the disassembly is easy at the same time, and urea crystallization can be prevented from being generated when NOx is subjected to redox reaction.
Description
technical field [0001] The invention relates to the technical field of automobile aftertreatment systems, in particular to a U-shaped aftertreatment structure. Background technique [0002] Diesel engine pollutants include exhaust pollutants and exhaust noise. Exhaust pollutants mainly include PM and NOx. Higher requirements are put forward for the mixing uniformity of the currently used urea injection, and at the same time, the limitation requirements for the quantity and quality of particulate matter are increased. [0003] It is difficult to simultaneously reduce the above two exhaust pollutants in the engine to meet the current emission requirements, so it is necessary to install diesel particulate filters, ammonia oxidation catalysts and other after-treatment devices on the basis of selective catalytic reduction . [0004] However, there are many deformation structures in the whole vehicle, such as double front axle vehicles, various special vehicles, traction, cargo...
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IPC IPC(8): F01N13/00F01N13/18F01N3/021F01N3/28F01N3/20
CPCF01N3/021F01N3/2066F01N3/28F01N13/009F01N13/18F01N2610/02F01N2610/14F01N2610/1486Y02A50/20Y02T10/12
Inventor 黄凯王科星邢喜春朱宏志朱光贞龙远
Owner FAW JIEFANG AUTOMOTIVE CO