CN216741777U - Three-way catalyst and power system with same - Google Patents

Abstract

The utility model provides a three-way catalyst and a power system with the same, wherein the three-way catalyst comprises: the exhaust gas recirculation device comprises a shell, a first end of the shell is provided with an air inlet, a second end of the shell is provided with an air outlet, the shell is provided with an air taking port, the air taking port is positioned between the air inlet and the air outlet, and the air taking port is used for being connected with an exhaust gas recirculation pipeline; the filter screen is arranged in the shell and positioned at the air taking port; the catalyst carrier is arranged in the shell and used for purifying gas entering the three-way catalyst. By applying the technical scheme of the utility model, the filter screen is arranged in the three-way catalyst and is arranged towards the air intake, compared with the mode that the filter screen is arranged on a pipeline between the three-way catalyst and the exhaust gas recirculation cooler in the prior art, the size of the filter screen in the application can not be limited by the pipe diameter of the exhaust gas recirculation pipeline, and the filter screen has better filtering effect.

Description

Three-way catalyst and power system with same

Technical Field

The utility model relates to the technical field of design and manufacture of engines, in particular to a three-way catalyst and a power system with the same.

Background

The application of external Exhaust Gas Recirculation (EGR) technology to gasoline engines can improve the thermal efficiency of the engines and reduce oil consumption and emission, so that the application is more and more extensive. And the screen is an essential part of the low pressure exhaust gas recirculation system. The filter screen can filter the hard particles in the waste gas and exceed the soot particles of a certain size, thereby protecting parts such as a supercharger, an EGR cooler and the like, and further ensuring the service life of the engine.

The existing screen is integrated with a metal gasket as one part, which is installed on the pipe from the three-way catalyst to the EGR cooler. The gasket needs both sides flange to press from both sides tightly, and the filter screen needs cooperate with the size in flange hole, and the size in flange hole mainly is decided by the pipe diameter of pipeline again, and the size of filter screen needs to receive the pipe diameter restriction of pipeline promptly. And the pipe diameter of the EGR gas taking pipeline cannot be too large due to the limitation of the installation space of the vehicle cabin and the manufacturing process of the pipeline, so that the size of the filter screen is limited.

As engine thermal efficiency increases, higher and higher EGR rates are required, which requires less and less resistance from the components in the EGR system. The flow area needs to be increased when the resistance of the filter screen is reduced, and two methods are mainly adopted, namely, under the condition that the overall dimension of the filter screen is fixed, the diameter of the holes of the filter screen is increased; secondly, under the condition that the diameter of the holes is not changed, the overall dimension of the filter screen is increased. However, the increase of the diameter of the filter screen holes can reduce the filtering effect of the filter screen and lose the effect of prolonging the service life of the engine. Therefore, in order to reduce the resistance of the filter screen, only the external dimension of the filter screen can be increased. If with current filter screen gasket structure, the filter screen gasket dress is limited at the intake manifold of EGR system on way, and installation space, the pipe diameter can not do very greatly usually, otherwise can not satisfy the installation requirement.

In addition, the filter screen has the risk of being blockked up by soot particulate matter owing to filter the soot particulate matter in the engine exhaust, is blockked up to certain degree when the filter screen, need improve engine exhaust temperature to above the uniform temperature, burns off the particulate matter high temperature on the filter screen, realizes the automatically cleaning, and current installs the mode at the inlet line of EGR system with the filter screen, because the restriction that the pipeline can bear the temperature, the automatically cleaning efficiency of filter screen is limited.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a three-way catalytic converter and a power system with the same, so as to solve the problem that the diameter of a filter screen is limited in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a three-way catalyst including: the exhaust gas recirculation device comprises a shell, a first end of the shell is provided with an air inlet, a second end of the shell is provided with an air outlet, the shell is provided with an air taking port, the air taking port is positioned between the air inlet and the air outlet, and the air taking port is used for being connected with an exhaust gas recirculation pipeline; the filter screen is arranged in the shell and is positioned at the air taking port; the catalyst carrier is arranged in the shell and used for purifying gas entering the three-way catalyst.

Further, the catalyst carrier is two, and one of them catalyst carrier is close to the air inlet and sets up, and another catalyst carrier is close to the gas outlet and sets up in order to form first cavity structure, has seted up on the lateral wall of first cavity structure and has got the gas port.

Further, the filter screen is arranged in the first cavity structure.

Further, be provided with first pipeline section and second pipeline section on the surface of casing, the first end and the first cavity structure intercommunication of first pipeline section, the casing extension setting is kept away from to the second end of first pipeline section, the first end and the first pipeline section intercommunication of second pipeline section, the first pipeline section extension setting is kept away from to the second end of second pipeline section, and the second end of second pipeline section has seted up the gas fetching mouth, first pipeline section, second pipeline section and casing are inside to enclose between and establish into first cavity structure, the filter screen sets up in first pipeline section.

Further, the inner diameter of the first pipe section is larger than the inner diameter of the second pipe section.

Further, the axis of at least one of the first and second tube sections is arranged at an angle to the axis of the housing.

Furthermore, an air intake port is arranged on the side wall of the shell opposite to the catalyst carrier.

Furthermore, the three-way catalyst also comprises a particle catcher, the catalyst carrier is arranged in the first end of the shell, the particle catcher is arranged in the second end of the shell, and the catalyst carrier and the particle catcher are arranged with a distance to form a second cavity structure.

Further, an air intake port is formed in the side wall of the second cavity structure, or an air intake port is formed in the side wall of the shell opposite to the particle trap.

According to another aspect of the utility model, a power system is provided, and the power system comprises a three-way catalyst, and the three-way catalyst is the three-way catalyst.

By applying the technical scheme of the utility model, the filter screen is arranged in the three-way catalyst, and the filter screen is arranged towards the air intake, so that the gas entering the exhaust gas recirculation pipeline is firstly filtered by the filter screen, and the filter screen can filter hard particulate matters and soot particulate matters in the gas, thereby protecting parts such as a supercharger, an exhaust gas recirculation cooler and the like, prolonging the service life of an engine.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 shows a schematic construction of a first embodiment of a three-way catalyst according to the utility model;

FIG. 2 shows a schematic construction of a second embodiment of a three-way catalyst according to the utility model;

FIG. 3 shows a schematic structural diagram of a third embodiment of a three-way catalyst according to the utility model;

fig. 4 shows a schematic structural diagram of a fourth embodiment of the three-way catalyst according to the utility model.

Wherein the figures include the following reference numerals:

1. a housing;

2. an air inlet;

3. an air outlet;

4. an air intake; 41. a first tube section; 42. a second tube section;

5. filtering with a screen;

6. a catalyst support; 61. a first cavity structure; 62. a second cavity structure;

7. a particle catcher.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

Referring to fig. 1-4, according to an embodiment of the present application, a three-way catalyst is provided.

The three-way catalyst includes: the waste gas recycling device comprises a shell 1, wherein a first end of the shell 1 is provided with an air inlet 2, a second end of the shell 1 is provided with an air outlet 3, the shell 1 is provided with an air taking port 4, the air taking port 4 is positioned between the air inlet 2 and the air outlet 3, and the air taking port 4 is used for being connected with a waste gas recycling pipeline; the filter screen 5 is arranged in the shell 1 and is positioned at the air intake 4; the catalyst carrier 6 is at least one, the catalyst carrier 6 is arranged in the shell 1, and the catalyst carrier 6 is used for purifying gas entering the three-way catalytic converter.

Use the technical scheme of this embodiment, set up the filter screen in three way catalyst converter, and the filter screen sets up towards the gas port, can make the gas that gets into the exhaust gas recirculation pipeline filter through the filter screen earlier, stereoplasm particulate matter and soot particulate matter in the filter screen filterable gas, thereby protect the booster, parts such as exhaust gas recirculation cooler, the life of extension engine, compare in prior art with the mode of installing the filter screen at the pipeline from three way catalyst converter to exhaust gas recirculation cooler between, the filter screen in this application is installed in three way catalyst converter, the size of filter screen can not receive the pipe diameter restriction of exhaust gas recirculation pipeline, better filter effect has, and simultaneously, the ambient temperature that the filter screen can bear is higher, the efficiency of engine automatically cleaning is higher.

The filter screen 5 can be connected with the shell 1 by welding, interference fit, riveting, thread fastening, crimping connection and the like. The shape of the filter screen can be round, square, bowl-shaped or other irregular shapes. In order to achieve better filtering effect, the shape of the filter screen should be as large as possible within the range allowed by the three-way catalyst structure, and specifically, the size of the filter screen 5 should be larger than the size of the pipe diameter of the air intake 4 or the exhaust gas recirculation pipeline.

Specifically, there are two catalyst carriers 6, one of the catalyst carriers 6 is disposed near the air inlet 2, the other catalyst carrier 6 is disposed near the air outlet 3, the two catalyst carriers 6 are disposed at intervals to form a first cavity structure 61, and the side wall of the first cavity structure 61 is provided with an air intake 4. As shown in fig. 1, the intake port 4 is disposed on a side wall of the first cavity structure 61, so that exhaust gas of the engine flows in from the intake port 2 of the three-way catalyst, and after passing through the catalyst carrier 6 disposed near the intake port 2, a part of the exhaust gas flow passes through the intake port 4 via the exhaust gas flow filter 5, and the rest of the exhaust gas flows through the catalyst carrier 6 disposed near the exhaust port 3 and flows out from the exhaust port 3 of the three-way catalyst.

Accordingly, the screen 5 is disposed within the first cavity structure 61.

Wherein, casing 1 is provided with first pipeline section 41 and second pipeline section 42 on the surface, the first end and the first cavity structure 61 intercommunication of first pipeline section 41, the second end of first pipeline section 41 is kept away from casing 1 and is extended the setting, the first end and the first pipeline section 41 intercommunication of second pipeline section 42, the second end of second pipeline section 42 is kept away from first pipeline section 41 and is extended the setting, and the second end of second pipeline section 42 has seted up air intake 4, first pipeline section 41, enclose between second pipeline section 42 and the casing 1 inside and establish into first cavity structure 61, filter screen 5 sets up in first pipeline section 41. As shown in fig. 2, the arrangement of the filter screen 5 in the first pipe segment 41 can facilitate the independent adjustment of the relative size and the relative position of the filter screen 5 and the air intake 4, and the size of the air intake 4 opened in the second pipe segment 42 can be kept unchanged when the size of the filter screen 5 in the first pipe segment 41 is adjusted by independently adjusting the pipe diameter of the first pipe segment 41.

Preferably, the inner diameter of the first tube section 41 is larger than the inner diameter of the second tube section 42. The arrangement enables the filter screen 5 arranged in the first pipe section 41 to have a larger installation space, the filtering effect of the waste gas passing through the filter screen 5 is better, and the waste gas entering the gas taking port 4 is filtered by the filter screen 5.

Further, the axis of at least one of the first tube section 41 and the second tube section 42 is arranged at an angle to the axis of the housing 1. In one embodiment of the present application, the axes of the first and second pipe sections 41, 42 are both arranged perpendicular to the axis of the housing 1. It should be noted that the axial arrangement of the first pipe section 41 and the second pipe section 42 should match the internal structure arrangement of the engine, and the axial arrangement of the first pipe section 41 and the second pipe section 42 can be arranged at an angle with the axial line of the housing 1, so that the occupied space of the three-way catalyst can be minimized.

Alternatively, the casing 1 is provided with an air intake port 4 on the side wall opposite to the catalyst carrier 6. Specifically, the gas extraction port 4 may also be provided on the side wall of the casing 1 opposite to the catalyst carrier 6 from the gas outlet 3, or the gas extraction port 4 may be provided on the side wall of the casing 1 opposite to the catalyst carrier 6 from the gas inlet 2.

Further, the three-way catalyst also comprises a particle trap 7, the catalyst carrier 6 being arranged in the first end of the housing 1, the particle trap 7 being arranged in the second end of the housing 1, the catalyst carrier 6 and the particle trap 7 being arranged with a distance therebetween to form a second cavity structure 62. In one embodiment of the present application, the catalyst carrier 6 is disposed adjacent to the gas inlet 2 and the particle trap 7 is disposed adjacent to the gas outlet 3. As shown in fig. 3 and 4, the particle trap 7 can trap particulate emissions in the gas to avoid contamination of the atmosphere.

Optionally, an air intake 4 is opened on a side wall of the second cavity structure 62, or an air intake 4 is opened on a side wall of the housing 1 opposite to the particle catcher 7. In particular, the gas extraction opening 4 may open on the side wall of the second cavity structure 62 and on the housing 1 between the gas outlet 3 and the particle catcher 7, the sieve 5 being located at the gas extraction opening 4 all the time.

In the embodiment of the application, the space in which the filter screen 5 can be integrated on the casing 1 of the three-way catalyst is more abundant than the space on the exhaust gas recirculation pipeline, the filter screen 5 is integrated on the casing 1 of the three-way catalyst, and more spaces can be provided to increase the overall dimension of the filter screen 5, so that the pressure drop of the exhaust gas recirculation gas flow filter screen 5 is reduced, and the resistance loss caused by the exhaust gas recirculation gas flowing through the filter screen is effectively reduced. Compare with the scheme of installing filter screen 5 on exhaust gas recirculation pipeline, filter screen 5 in this application is close to the heat source, and the ambient temperature who bears is higher, and the efficiency that can realize the automatically cleaning is higher.

According to another specific embodiment of the present application, there is provided a power system including a three-way catalyst, the three-way catalyst being the above-described three-way catalyst.

Preferably, the power system comprises a cylinder, the cylinder is provided with an exhaust pipeline, the exhaust pipeline is connected with an air inlet 2 of the three-way catalyst, exhaust gas exhausted by the cylinder is purified by the three-way catalyst and then is exhausted out of the power system through an air outlet 3, and the purified gas has small pollution to the atmosphere and good environment protection effect. The power system also includes an exhaust gas recirculation system, which in one embodiment of the present application is a low pressure exhaust gas recirculation system. The first end of the exhaust gas recirculation pipeline in the exhaust gas recirculation system is connected with the air inlet pipeline of the cylinder, the second end of the exhaust gas recirculation pipeline is connected with the air intake port 4 of the three-way catalyst, the filter screen 5 which is arranged in the three-way catalyst and corresponds to the air intake port 4 can purify the exhaust gas discharged from the cylinder, hard particles and soot particles exceeding a certain size in the exhaust gas are filtered, the exhaust gas is filtered by the filter screen 5 and then enters the exhaust gas recirculation pipeline, the damage to the supercharger, the damage to parts such as the exhaust gas recirculation cooler and the like can be reduced, and therefore the service life of the power system is prolonged. In the prior art, the filter screen 5 is arranged on the exhaust gas recirculation pipeline, the size of the filter screen 5 is limited due to the limitation of the pipe diameter of the exhaust gas recirculation pipeline, the filter screen 5 is arranged in the three-way catalytic converter, the filter screen 5 has larger arrangement space, the size of the filter screen 5 is increased, the filtering effect of the filter screen 5 can be effectively improved, meanwhile, the power system needs to periodically carry out self-cleaning to crush the particles attached to the filter screen 5, so as to prevent the particles from blocking the filter holes of the filter screen 5 and reducing the filtering effect of the filter screen 5, when the filter screen 5 is arranged on the exhaust gas recirculation pipeline, because the position of filter screen 5 is far away from the heat source, the clean temperature of acquisition is lower for filter screen 5's clean effect descends, sets up filter screen 5 in three way catalyst converter in this embodiment, and filter screen 5 is more close to the heat source, and the clean temperature of acquisition is higher, and filter screen 5's clean effect is better, and filter screen 5 has better long-term result of use.

According to another specific embodiment of the present application, a vehicle is provided, the vehicle including a power system, the power system being the power system in the above-described embodiment. The vehicle with the power system has better exhaust gas recycling effect and longer service life, the vehicle with the sufficient exhaust gas purification and exhaust gas recycling effects has better environment-friendly effect, and has wider application prospect in the vehicle market.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the utility model to effect such feature, structure, or characteristic in connection with other embodiments.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A three-way catalyst, comprising:

the exhaust gas recirculation device comprises a shell (1), wherein a first end of the shell (1) is provided with an air inlet (2), a second end of the shell (1) is provided with an air outlet (3), the shell (1) is provided with an air intake (4), the air intake (4) is positioned between the air inlet (2) and the air outlet (3), and the air intake (4) is used for being connected with an exhaust gas recirculation pipeline;

the filter screen (5) is arranged in the shell (1) and is positioned at the air intake (4);

the catalyst carrier (6), catalyst carrier (6) is at least one, catalyst carrier (6) set up in casing (1), catalyst carrier (6) are used for purifying the gas that gets into in the three way catalyst converter.

2. The three-way catalyst according to claim 1, wherein the number of the catalyst carriers (6) is two, one of the catalyst carriers (6) is disposed near the air inlet (2), the other catalyst carrier (6) is disposed near the air outlet (3), the two catalyst carriers (6) are disposed at intervals to form a first cavity structure (61), and the air intake port (4) is opened on a side wall of the first cavity structure (61).

3. Three-way catalyst according to claim 2, characterized in that the screen (5) is arranged in the first cavity structure (61).

4. Three-way catalyst according to claim 2 or 3, characterized in that a first pipe section (41) and a second pipe section (42) are provided on the surface of the housing (1), a first end of the first tube section (41) communicates with the first cavity structure (61), the second end of the first pipe section (41) extends away from the housing (1), a first end of the second tube section (42) communicates with the first tube section (41), a second end of the second tube section (42) extends away from the first tube section (41), and the second end of the second pipe section (42) is provided with the air intake (4), the first cavity structure (61) is enclosed between the first pipe section (41), the second pipe section (42) and the inside of the shell (1), and the filter screen (5) is arranged in the first pipe section (41).

5. Three-way catalyst according to claim 4, characterized in that the inner diameter of the first tube section (41) is larger than the inner diameter of the second tube section (42).

6. Three-way catalyst according to claim 4, characterized in that the axis of at least one of the first tube section (41) and the second tube section (42) is arranged at an angle to the axis of the housing (1).

7. The three-way catalyst according to claim 1, wherein the intake port (4) is opened in a side wall of the casing (1) opposite to the catalyst carrier (6).

8. The three-way catalyst according to claim 1, further comprising a particle trap (7), the catalyst carrier (6) being arranged in a first end of the housing (1), the particle trap (7) being arranged in a second end of the housing (1), the catalyst carrier (6) and the particle trap (7) being arranged with a distance therebetween to form a second cavity structure (62).

9. The three-way catalyst according to claim 8, characterized in that the air intake (4) opens in a side wall of the second cavity structure (62), or the air intake (4) opens in a side wall of the housing (1) opposite to the particle trap (7).

10. A power system comprising a three-way catalyst, characterized in that the three-way catalyst is a three-way catalyst as recited in any one of claims 1 to 9.

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