Motor vehicle engine exhaust treatment system integrated with silencing structure
阅读说明:本技术 集成有消音结构的机动车发动机废气处理系统 (Motor vehicle engine exhaust treatment system integrated with silencing structure ) 是由 袁磊 何源 贾克斌 武鹏 钟警 于 2019-04-09 设计创作,主要内容包括:本申请公开了一种集成有消音结构的发动机废气处理系统,所述发动机废气处理系统包括多个用于废气处理模块,每个废气处理模块在其中限定气流能够经过的内部通道,并且所述多个废气处理模块依次串联,所述发动机废气处理系统还包括与所述多个废气处理模块中的最下游的废气处理模块的内部通道连通的出口管,其中,所述最下游的废气处理模块具有筒形外壳,所述出口管穿过所述筒形外壳的一个封闭端盖设置,所述消音结构至少部分地设置在所述筒形外壳中,所述消音结构包括:消音挡板,所述消音挡板形成有多个供气流经过的消音通孔并且在所述筒形外壳内固定于所述封闭端盖的上游。(An engine exhaust treatment system integrated with a muffler structure, the engine exhaust treatment system including a plurality of exhaust treatment modules, each exhaust treatment module defining an internal passage therein through which a gas flow can pass, and the plurality of exhaust treatment modules being serially connected in series, the engine exhaust treatment system further including an outlet pipe communicating with the internal passage of a most downstream exhaust treatment module of the plurality of exhaust treatment modules, wherein the most downstream exhaust treatment module has a cylindrical housing, the outlet pipe being disposed through one closed end cap of the cylindrical housing, the muffler structure being at least partially disposed in the cylindrical housing, the muffler structure including: a noise reduction baffle plate formed with a plurality of noise reduction through holes through which a gas flow passes and fixed upstream of the end cap in the cylindrical housing.)
1. An engine exhaust treatment system (100, 200) integrated with a sound deadening structure, the engine exhaust treatment system (100, 200) including a plurality of exhaust treatment modules for exhaust treatment, each exhaust treatment module defining an internal passage therein through which a gas flow can pass, and the plurality of exhaust treatment modules being connected in series, the engine exhaust treatment system (100, 200) further including an outlet pipe (120) communicating with the internal passage of a most downstream exhaust treatment module of the plurality of exhaust treatment modules,
wherein the most downstream exhaust treatment module has a cylindrical housing (1301), the outlet pipe (120) being arranged through one closed end cap (150) of the cylindrical housing (1301),
the sound attenuating structure is at least partially disposed in the cylindrical shell (1301), the sound attenuating structure comprising:
a sound-deadening baffle plate (140) formed with a plurality of sound-deadening through-holes (141) through which a gas flow passes and fixed upstream of the end cap (150) within the cylindrical shell (1301).
2. The engine exhaust gas treatment system (100, 200) with an integrated muffling structure of claim 1, wherein the muffling baffle (140) further comprises a connecting through hole (142), and one end (121) of the outlet pipe (120) is fixed in the connecting through hole (142).
3. The engine exhaust gas treatment system (100, 200) with an integrated silencing structure of claim 1 or 2, wherein the silencing baffle (140) is arranged substantially perpendicular to the longitudinal axis of the cylindrical shell (1301).
4. The engine exhaust gas treatment system (100, 200) with integrated muffler structure according to claim 1 or 2, wherein the most downstream exhaust gas treatment module is a Diesel Particulate Filter (DPF) module comprising a filter cartridge (1302) fixed within the cylindrical housing (131) upstream of the muffler baffle (140).
5. The engine exhaust gas treatment system (100, 200) with an integrated muffling structure of claim 1 or 2, wherein an additional muffling baffle is fixed in the cylindrical shell (1301) upstream of and spaced apart from the muffling baffle (140), the additional muffling baffle also being formed with a plurality of muffling through-holes.
6. The engine exhaust gas treatment system (100, 200) with an integrated sound deadening structure according to claim 1 or 2, wherein the outlet pipe (120) is formed with a plurality of openings through which the gas flow passes in a section between the sound deadening baffle (140) and the end cover (150).
7. The engine exhaust gas treatment system (100, 200) with an integrated sound attenuation structure according to claim 1 or 2, wherein the end of the outlet pipe (120) protruding from the end closure (150) is in a flared shape with a gradually increasing cross section.
8. The engine exhaust gas treatment system (100, 200) with an integrated sound attenuation structure according to claim 1 or 2, characterized in that the outlet pipe (120) is disposed non-coaxially with the cylindrical housing (1301).
9. A motor vehicle comprising an engine and an exhaust pipe connected to an exhaust gas outlet end of the engine, characterized in that an engine exhaust gas treatment system (100, 200) according to any one of claims 1 to 8 is connected in series inside the exhaust pipe.
10. The motor vehicle of claim 9, wherein the motor vehicle is a diesel vehicle.
Technical Field
The present application relates to an engine exhaust gas treatment system integrated with a sound attenuation structure, and also relates to a motor vehicle equipped with the engine exhaust gas treatment system.
Background
For reasons of environmental protection, engines of motor vehicles, in particular diesel vehicles, are usually equipped with exhaust gas treatment systems. The exhaust gas treatment system has a plurality of exhaust gas treatment modules in order to reduce the emission of environmentally harmful substances in the exhaust gas of the engine.
In general, the engine of a motor vehicle is located in the direction of the front of the vehicle, while the engine exhaust pipe extends under the chassis of the motor vehicle from the engine to the rear of the vehicle, wherein the exhaust pipe must also be arranged around the rear wheel axle of the motor vehicle. As the exhaust emission regulations of motor vehicle engines become more stringent, the number of exhaust treatment modules required to be equipped with the exhaust treatment system of the motor vehicle engine also becomes larger. This results in insufficient space in front of the rear axle to allow the muffler to be installed. A muffler is a device that reduces engine exhaust noise and is generally a necessary component to improve the experience of the driver or passenger of a motor vehicle. Therefore, how to reasonably arrange a silencer in a motor vehicle on the premise of meeting the requirements of increasingly strict exhaust emission regulations becomes an urgent problem to be solved.
Disclosure of Invention
The present application is directed to a sound-deadening structure integrated with an engine exhaust gas treatment system to ensure the riding comfort of the driver or passengers of a motor vehicle on the premise of meeting increasingly stringent exhaust emission regulations.
According to one aspect of the present application, there is provided an engine exhaust treatment system integrated with a sound attenuating structure, the engine exhaust treatment system including a plurality of exhaust treatment modules, each exhaust treatment module defining an internal passage therein through which a gas flow can pass, and the plurality of exhaust treatment modules being connected in series, the engine exhaust treatment system further including an outlet pipe communicating with the internal passage of a most downstream exhaust treatment module of the plurality of exhaust treatment modules, wherein the most downstream exhaust treatment module has a cylindrical housing, the outlet pipe being disposed through one closed end cap of the cylindrical housing, the sound attenuating structure being at least partially disposed in the cylindrical housing, the sound attenuating structure comprising: a noise reduction baffle plate formed with a plurality of noise reduction through holes through which a gas flow passes and fixed upstream of the end cap in the cylindrical housing. Like this, because the amortization structure is integrated in engine exhaust system directly, so can no longer consider external muffler to the motor vehicle chassis structure influence and design the structure of the blast pipe of motor vehicle more in a flexible way to make engine exhaust system can hold the exhaust-gas treatment module of more quantity, satisfy more and more strict exhaust-gas emission regulation requirement.
Optionally, the noise-reduction baffle further includes a connecting through-hole in which one end of the outlet pipe is fixed. Therefore, the extension length of the outlet pipe can be longitudinally shortened, and the flexibility of the structural design of the chassis of the motor vehicle is convenient to increase.
Optionally, the sound-attenuating baffle is disposed substantially perpendicular to a longitudinal axis of the cylindrical shell. In this way it is ensured that the air flow is reflected back and forth in the housing as much as possible before it is discharged from the outlet duct. Optionally, the outlet tube is arranged non-coaxially with the cylindrical housing. Thereby, it is ensured as much as possible that the gas flow is reflected in the housing past the sound-deadening barrier before being discharged from the outlet pipe.
Optionally, the most downstream exhaust treatment module is a diesel particulate filter module comprising a filter cartridge secured within the cylindrical housing upstream of the sound-attenuating baffle. In this way, the filter element can also be used as part of a noise reduction structure for eliminating high frequency noise components generated by the vibration of the gas flow.
Optionally, an additional sound-deadening baffle is fixed in the cylindrical shell upstream of and spaced apart from the sound-deadening baffle, the additional sound-deadening baffle also being formed with a plurality of sound-deadening through-holes. In this way, the sound deadening effect is further enhanced.
Optionally, the outlet pipe is formed with a plurality of openings for the gas flow to pass through in a section between the sound-deadening baffle and the end closure. The silencing effect is further improved because the number of reflections of the gas flow before it is discharged from the exhaust gas treatment system is increased.
Optionally, the end of the outlet tube extending from the closed end cap is flared with a gradually increasing cross-section. Since the flow velocity of the discharged air flow can be reduced, the vibration noise component can be reduced.
According to another aspect of the application, there is also provided a motor vehicle, in particular a diesel vehicle, comprising an engine and an exhaust pipe connected to an exhaust gas outlet end of the engine, wherein the aforementioned engine exhaust gas treatment systems are connected in series within the exhaust pipe.
Adopt above-mentioned technical means of this application, can reduce the degree of difficulty of motor vehicle chassis structural design to ensure that the exhaust treatment system including the exhaust treatment module of more quantity can arrange in the chassis, reduce exhaust noise when satisfying more and more strict exhaust emission regulation requirement.
Drawings
The foregoing and other aspects of the present application will be more fully understood from the following detailed description, taken together with the following drawings. It is noted that the drawings may not be to scale for clarity of illustration and will not detract from the understanding of the present application. In the drawings:
FIG. 1 schematically illustrates an engine exhaust treatment system integrated with a sound attenuating structure, where the engine exhaust treatment system has been installed in an exhaust pipe of a motor vehicle, according to one embodiment of the present application;
FIG. 2 schematically illustrates an enlarged view of a portion of the engine exhaust treatment system of FIG. 1;
FIG. 3 schematically illustrates a portion of a sound attenuating structure in the engine exhaust treatment system shown in FIG. 2;
FIG. 4 schematically illustrates a portion of an engine exhaust treatment system incorporating a sound attenuating structure according to another embodiment of the present application; and is
Fig. 5(a) and 5(b) schematically show noise measurement results when the engine is running, respectively, using the engine exhaust gas treatment system integrated with a sound deadening structure according to the present application.
Detailed Description
In the various figures of the present application, features that are structurally identical or functionally similar are denoted by the same reference numerals.
FIG. 1 schematically illustrates an engine
As further shown in fig. 1, the
The engine
The exhaust treatment modules can be connected to each other in series in any suitable order as desired. In the embodiments described herein, the diesel particulate filter module is shown as the most downstream exhaust treatment module; however, in alternative embodiments, the most downstream exhaust treatment module may also be, for example, a selective catalytic reduction module or other (not mentioned) module.
With further reference to FIG. 2, the exhaust treatment module most downstream of the engine
The integrated sound attenuating structure of the engine
As further shown in fig. 3, a plurality of silencing through
One
For example,
As shown in fig. 3, in
According to the solution of the present application, the
The arrangement and/or diameter size of each silencing through-
In another alternative embodiment,
FIG. 4 illustrates an engine
Fig. 5(a) and 5(b) schematically show exhaust noise results measured while the engine is running, for the engine exhaust
In the embodiment described, the most downstream exhaust treatment module, into which the sound-damping arrangement is integrated, is a diesel particle filter module with a filter insert, so that the exhaust gas flow, when passing through the filter openings of the filter insert, also acts to dampen the flow noise because of the reduced flow velocity. Additionally, it should be apparent to those skilled in the art that in an alternative embodiment, the diesel particulate filter module may be replaced by a module without any core material, such as without a
Although specific embodiments of the present application have been described herein in detail, they have been presented for purposes of illustration only and are not to be construed as limiting the scope of the application. Various substitutions, alterations, and modifications may be conceived without departing from the spirit and scope of the present application.
- 上一篇:一种医用注射器针头装配设备
- 下一篇:用于车辆的热交换器的管销组件