CN217602753U - Catalyst, exhaust gas recirculation system, engine assembly and vehicle - Google Patents
Catalyst, exhaust gas recirculation system, engine assembly and vehicle Download PDFInfo
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- CN217602753U CN217602753U CN202220988397.XU CN202220988397U CN217602753U CN 217602753 U CN217602753 U CN 217602753U CN 202220988397 U CN202220988397 U CN 202220988397U CN 217602753 U CN217602753 U CN 217602753U
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Abstract
The utility model discloses a catalyst converter, exhaust gas recirculation system, engine assembly and vehicle, the catalyst converter includes: a housing having a catalytic gas inlet, a catalytic gas return, and a catalytic gas outlet; first catalysis core and second catalysis core, first catalysis core with the second catalysis core is located in the casing, first catalysis core with go out the air cavity in the middle of forming between the second catalysis core, first catalysis core is located the catalysis air inlet with go out between the air cavity in the middle, the catalysis return air inlet with go out the air cavity intercommunication in the middle, the second catalysis core is located the catalysis gas outlet with go out between the air cavity in the middle. According to the utility model discloses the catalyst converter can catalyze the filtration to waste gas, has the advantage such as guarantee that waste gas is clean, exhaust pressure is sufficient and exhaust gas recirculation utilization ratio is high.
Description
Technical Field
The utility model belongs to the technical field of the vehicle technique and specifically relates to a catalyst converter, exhaust gas recirculation system, engine assembly and vehicle are related to.
Background
The catalyst of the exhaust gas recirculation system in the related technology is generally arranged in two ways, firstly, the catalyst is arranged behind the exhaust gas return pipe, namely, the catalyst is used for taking gas before catalysis, the exhaust gas enters the engine through the exhaust gas return pipe without being filtered by the catalyst, and because the exhaust gas does not pass through the catalyst, the exhaust gas contains a large amount of impurities, carbon deposition and coking are easily formed in the exhaust gas recirculation system, and the valve body is blocked or an air inlet gas circuit is blocked; secondly, arrange the catalyst converter in the place ahead of exhaust gas muffler, get gas promptly after urging, waste gas rethread exhaust gas muffler circulation gets into the engine after catalyst converter carrier filters, but the pressure loss of the waste gas after the catalyst converter filters is big, leads to the exhaust gas pressure that gets into the engine not enough, and the waste gas flow is not enough, is difficult to guarantee the circulation reuse rate of waste gas, and then leads to the oil consumption higher.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a catalyst converter, this catalyst converter can catalyze the filtration to waste gas, have the advantage such as guaranteeing that waste gas is clean, waste gas pressure is sufficient and exhaust gas recirculation rate is high.
The utility model also provides an exhaust gas recirculation system of having above-mentioned catalyst converter.
The utility model also provides an engine assembly of having above-mentioned exhaust gas recirculation system.
The utility model also provides a vehicle of having above-mentioned engine assembly.
In order to achieve the above object, according to a first aspect of the present invention, a catalyst is provided, including: a housing having a catalytic gas inlet, a catalytic gas return, and a catalytic gas outlet; the first catalytic core and the second catalytic core are arranged in the shell, a middle air outlet cavity is formed between the first catalytic core and the second catalytic core, the first catalytic core is positioned between the catalytic air inlet and the middle air outlet cavity, the catalytic air return port is communicated with the middle air outlet cavity, and the second catalytic core is positioned between the catalytic air outlet and the middle air outlet cavity; the volume of the first catalytic core is 40-60% of the volume of the second catalytic core.
According to the utility model discloses the catalyst converter can catalyze the filtration to waste gas, has advantages such as guaranteeing that waste gas is clean, exhaust pressure is sufficient and exhaust gas recirculation rate is high.
According to some embodiments of the present invention, the housing has a first end and a second end, the first catalytic core and the second catalytic core are arranged along the axial direction of the housing, the first end is located keeping away from the first catalytic core one side of the second catalytic core, the catalytic air inlet is located at the first end, the catalytic air outlet is located at the second end, the catalytic air return opening is located at the peripheral surface of the housing.
According to the utility model discloses an embodiment of second aspect has provided an exhaust gas recirculation system, include: a catalyst according to an embodiment of the first aspect of the invention; an intake pipe having an air inlet adapted to communicate with air, an air supply port adapted to communicate with an intake manifold of an engine, and a return port located between the air inlet and the air supply port in a length direction of the intake pipe; an exhaust pipe having one end in communication with the catalytic inlet and another end adapted to communicate with an exhaust manifold of an engine; and the waste gas return pipe is respectively communicated with the catalytic return air port and the return air port.
According to the utility model discloses an exhaust gas recirculation system of second aspect embodiment is through utilizing according to the utility model discloses a catalyst converter of first aspect embodiment can catalyze the filtration to waste gas, has advantages such as guaranteeing that waste gas is clean, exhaust gas pressure is sufficient and exhaust gas recirculation utilization ratio is high.
According to some embodiments of the present invention, the exhaust gas recirculation system further comprises: a fitting having a curved end that fits against the outer surface of the housing and communicates with the catalytic return air port; and one end of the elastic pipe is communicated with the joint, and the other end of the elastic pipe is communicated with the waste gas return pipe.
According to some embodiments of the invention, a ratio of a contact area of the curved end with the housing to an area of the catalytic return air port is between 2 and 3.
According to some embodiments of the invention, the exhaust gas recirculation system further comprises: the cooler is arranged on the exhaust gas return pipe; the exhaust gas valve is arranged on the exhaust gas return pipe and is positioned on one side, back to the catalyst, of the cooler; the air inlet control valve is arranged on the air inlet pipe and is positioned between the air inlet and the air return port; the supercharger is provided with a pressure end and a vortex end, the pressure end is arranged on the air inlet pipe and is positioned between the air supply port and the air return port, and the vortex end is arranged on the air outlet pipe.
According to the utility model discloses a third aspect embodiment provides an engine assembly, include: an engine having an intake manifold and an exhaust manifold; according to the utility model discloses an exhaust gas recirculation system of second aspect embodiment.
According to the utility model discloses an engine assembly of third aspect embodiment, through utilizing according to the utility model discloses an exhaust gas recirculation system of second aspect embodiment can carry out catalytic filtration to waste gas, has the advantage such as guaranteeing that waste gas is clean, exhaust gas pressure is sufficient and exhaust gas recirculation utilization is high.
According to the utility model discloses a fourth aspect embodiment provides a vehicle, includes according to the utility model discloses an engine assembly of third aspect embodiment.
According to the utility model discloses a vehicle of fourth aspect embodiment, through utilizing according to the utility model discloses an engine assembly of third aspect embodiment can catalyze the filtration to waste gas, has the advantage such as guaranteeing that waste gas is clean, exhaust pressure is sufficient and exhaust gas recirculation rate is high.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a catalyst according to an embodiment of the present invention.
Fig. 2 is a schematic connection diagram of a catalyst, a fitting, and an elastic tube according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view of a catalyst, a fitting, and an elastomeric tube according to an embodiment of the invention.
Fig. 4 is a schematic connection diagram of a joint, an elastic tube and a flange according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an exhaust gas recirculation system according to an embodiment of the present invention.
Fig. 6 is a schematic connection diagram of an exhaust gas recirculation system according to an embodiment of the present invention.
Reference numerals:
a catalyst 1, an exhaust gas recirculation system 2,
A housing 100, a catalytic inlet 110, a catalytic return 120, a first end 130, a second end 140, a positioning slot 150, a catalytic outlet 160, a,
A first catalytic core 200, an intermediate air outlet cavity 210, a second catalytic core 300,
An intake pipe 400, an intake port 410, an air supply port 420, an air return port 430,
An exhaust gas return pipe 500,
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
A catalyst 1 according to an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1 to 6, a catalyst 1 according to an embodiment of the present invention includes a housing 100, a first catalytic core 200, and a second catalytic core 300.
The casing 100 is provided with a catalytic air inlet 110, a catalytic air return port 120 and a catalytic air outlet 160, the first catalytic core 200 and the second catalytic core 300 are arranged in the casing 100, a middle air outlet cavity 210 is formed between the first catalytic core 200 and the second catalytic core 300, the first catalytic core 200 is positioned between the catalytic air inlet 110 and the middle air outlet cavity 210, the catalytic air return port 120 is communicated with the middle air outlet cavity 210, and the second catalytic core 300 is positioned between the catalytic air outlet 160 and the middle air outlet cavity 210.
According to the catalyst 1 of the embodiment of the present invention, by disposing the first catalyst core 200 and the second catalyst core 300 in the housing 100, the middle air outlet cavity 210 is formed between the first catalyst core 200 and the second catalyst core 300, that is, by dividing the catalyst core in the catalyst 1 into the first catalyst core 200 and the second catalyst core 300, so that the individual volume of the first catalyst core 200 or the second catalyst core 300 is smaller than the volume of the catalyst core in the catalyst in the related art, but the overall volume of the first catalyst core 200 and the second catalyst core 300 is substantially similar to the volume of the catalyst core in the catalyst in the related art.
Thus, because the volume of each of the first catalytic core 200 and the second catalytic core 300 is reduced, the exhaust gas which is separately catalyzed and filtered through any one of the first catalytic core 200 and the second catalytic core 300 can be cleaned to a certain degree, and the pressure loss of the filtered exhaust gas is not too large, so that the exhaust gas can be ensured to have sufficient circulating flow pressure, the flow of the exhaust gas is ensured, and the cleanliness of the exhaust gas and the sufficient balance of the flow pressure of the exhaust gas are realized.
In addition, the first catalytic core 200 is located between the catalytic air inlet 110 and the middle air outlet cavity 210, the catalytic air return port 120 is communicated with the middle air outlet cavity 210, and the second catalytic core 300 is located between the catalytic air outlet 160 and the middle air outlet cavity 210, so that the exhaust gas generated by the engine can enter the catalytic converter 1 through the catalytic air inlet 110, the exhaust gas needs to be filtered by the first catalytic core 200 and then enters the middle air outlet cavity 210, then a part of the exhaust gas of the middle air outlet cavity 210 can be directly discharged to the engine through the catalytic air return port 120, and the other part of the exhaust gas of the middle air outlet cavity 210 can be filtered by the second catalytic core 300 and then discharged to the exhaust pipe of the vehicle through the catalytic air outlet 160 and then discharged into the air through the exhaust gas post-treatment system.
Like this, the degree of cleanness that gets into the waste gas of catalysis return-air inlet 120 by middle air outlet cavity 210 is moderate and pressure is sufficient, thereby the condition that has reduced carbon deposit and coking effectively takes place, and then avoid causing valve clamping stagnation and gas circuit to block up, and only the loss of the atmospheric pressure of the waste gas after first catalysis core 200 purification filtration can be less, thereby can guarantee that the atmospheric pressure of the waste gas that gets into the engine is sufficient, the flow of circulation waste gas is great, be favorable to improving exhaust gas circulation reuse rate, reduce the engine oil consumption, simultaneously, another part waste gas in middle air outlet cavity 210 still filters the purification through second catalysis core 300, through dual cleanness, the waste gas of having guaranteed to discharging in the air of engine can accord with emission standard.
The cross-sectional area of the first catalytic core 200 and the cross-sectional area of the second catalytic core 300 are adapted to the cross-sectional area of the housing 100, so that the exhaust gas entering the housing 100 from the catalytic inlet 110 can enter the middle outlet cavity 210 after being completely or almost completely filtered by the first catalytic core 200, and the purifying and filtering effects of the first catalytic core 200 on the exhaust gas are ensured.
Therefore, according to the utility model discloses catalyst converter 1 can catalyze the filtration to waste gas, has the advantage such as guarantee that waste gas is clean, exhaust pressure is sufficient and exhaust gas recirculation rate of utilization is high.
In some embodiments of the present invention, as shown in fig. 3 and 6, the volume of the first catalytic core 200 is smaller than the volume of the second catalytic core 300. For example, the dimension of the first catalytic core 200 in the axial direction of the catalyst 1 is smaller than the dimension of the second catalytic core 300 in the axial direction of the catalyst 1, and the cross-sectional area of the first catalytic core 200 and the cross-sectional area of the second catalytic core 300 are substantially the same.
Like this, the volume of first catalysis core 200 accounts for the proportion of first catalysis core 200 and the total volume of second catalysis core 300 is littleer, has further reduced the pressure loss of waste gas after first catalysis core 200 filters, makes the mobile atmospheric pressure of the waste gas after first catalysis core 200 purifies filtration can be as big as possible, and the flow of circulation waste gas is sufficient to can improve exhaust gas recirculation utilization, reduce engine oil and consume.
In addition, it should be noted that, a part of the exhaust gas filtered by the first catalytic core 200 flows to the engine through the intermediate exhaust cavity 210 and the catalytic return air inlet 120, so as to ensure sufficient flow of the circulating exhaust gas, while the other part of the exhaust gas continues to be filtered and catalyzed by the second catalytic core 300, and the second catalytic core 300 can further filter the exhaust gas, so that the exhaust gas becomes cleaner and then is discharged into the air.
In some embodiments of the present invention, as shown in fig. 3 and 6, the volume of the first catalytic core 200 is 40% to 60% of the volume of the second catalytic core 300. For example, the volume of the first catalytic core 200 may be 40%, 45%, 50%, 55%, or 60% of the volume of the second catalytic core 300.
From this, the volume of first catalysis core 200 can be far less than the volume of second catalysis core 300, the pressure loss of the waste gas after first catalysis core 200 purification filtration has further been reduced, and then the flow of guaranteeing circulation waste gas is sufficient, in order to improve exhaust gas recirculation utilization ratio, wherein, through fluid dynamics analysis and actual measurement, for the catalyst converter among the correlation technique, the setting can make the atmospheric pressure of catalysis return air mouth 120 department improve 20% like this, make exhaust gas recirculation utilization ratio improve 5% simultaneously, exhaust gas recirculation utilization ratio has been improved and the oil consumption has been reduced more effectively.
And, the volume of second catalysis core 300 still can be great, and the total volume of first catalysis core 200 and second catalysis core 300 can be great, and waste gas is better through the purification filter effect of first catalysis core 200 and second catalysis core 300, can guarantee that the waste gas after the filtration of catalyst converter 1 is cleaner to can satisfy the exhaust emission standard of six countries.
In some embodiments of the present invention, as shown in fig. 3, the housing 100 has a first end 130 and a second end 140.
The first catalytic core 200 and the second catalytic core 300 are arranged along the axial direction of the casing 100, the first end 130 is located at one side of the first catalytic core 200 far away from the second catalytic core 300, the catalytic gas inlet 110 is arranged at the first end 130, the catalytic gas outlet 160 is arranged at the second end 140, and the catalytic gas return 120 is arranged at the circumferential surface of the casing 100.
It can be understood that, the axially extending space of the casing 100 is larger, it is convenient to arrange the first catalytic core 200 and the second catalytic core 300 at intervals, the layout is more convenient, and after the exhaust gas enters the casing 100 through the catalytic air inlet 110, the exhaust gas can be filtered through the first catalytic core 200 first, the first catalytic core 200 and the second catalytic core 300 can have an obvious sequence in the filtering of the exhaust gas, that is, when the engine needs a larger amount of circulating exhaust gas, a part of the exhaust gas filtered through the first catalytic core 200 can be directly discharged to the engine through the catalytic air return port 120 on the peripheral surface of the casing 100, so as to meet the air intake requirement of the engine, the oil consumption is reduced, another part of the exhaust gas filtered through the first catalytic core 200 can be continuously purified and filtered through the second catalytic core 300 and then discharged into the air through the catalytic air outlet 160, and the structure setting is more reasonable.
An exhaust gas recirculation system 2 according to an embodiment of the present invention is described below with reference to the drawings, and as shown in fig. 5 and 6, the exhaust gas recirculation system 2 includes a catalyst 1, an intake pipe 400, an exhaust pipe, and an exhaust gas return pipe 500 according to the above-described embodiment of the present invention.
The intake pipe 400 has an intake port 410, an air supply port 420 and a return port 430, the intake port 410 being adapted to communicate with air, the air supply port 420 being adapted to communicate with an intake manifold of the engine, the return port 430 being located between the intake port 410 and the air supply port 420 in the length direction of the intake pipe 400, one end of the exhaust pipe being adapted to communicate with the catalytic intake port 110 and the other end being adapted to communicate with an exhaust manifold of the engine, the exhaust return pipe 500 being in communication with the catalytic return port 120 and the return port 430, respectively.
Thus, fresh air may enter the intake pipe 400 through the intake port 410 of the intake pipe 400 and be distributed into the respective cylinders of the engine through the air supply port 420 and the intake manifold of the engine, enabling the engine to operate normally. Further, the return air port 430 is located between the air inlet 410 and the air supply port 420 in the length direction of the air inlet pipe 400, so that exhaust gas generated from the engine can enter the catalyst 1 through the exhaust pipe and the catalytic air inlet 110 to be purified and filtered, and then enter the air inlet pipe 400 through the catalytic return air port 120, the exhaust gas return pipe 500 and the return air port 430, thereby realizing exhaust gas recycling.
According to the utility model discloses exhaust gas recirculation system 2, through utilizing according to the utility model discloses above-mentioned embodiment's catalyst converter 1 can carry out catalytic filtration to waste gas, has advantages such as guaranteeing that waste gas is clean, exhaust gas pressure is sufficient and exhaust gas recirculation rate is high.
In some embodiments of the present invention, as shown in fig. 2-5, the exhaust gas recirculation system 2 further comprises a joint 600 and an elastic tube 700.
The joint 600 has a curved end 610, the curved end 610 is attached to the outer surface of the casing 100 and is communicated with the catalytic gas return port 120, one end of the elastic tube 700 is communicated with the joint 600, and the other end is communicated with the exhaust gas return tube 500. The other end of the elastic tube 700 can be communicated with the exhaust gas return pipe 500 through the flange 710, the connection structure is simple, and the communication between the elastic tube 700 and the exhaust gas return pipe 500 can be ensured. Also, the elastic tube 700 may be a bellows tube.
It can be understood that the area of the curved end 610 of the joint 600 is relatively large, the curved end 610 can be made by a stamping process, the curved end 610 is contacted and welded with the outer peripheral surface of the housing 100, the welding area of the joint 600 and the housing 100 can be increased, the reliability of the welding connection is higher, and thus the problem of cracking failure at the joint of the joint 600 and the housing 100 is effectively avoided. Also, the outer circumferential surface of the case 100 may be provided with the positioning groove 150, and the connector 600 is placed in the positioning groove 150, which can improve positioning reliability between the connector 600 and the case 100 and increase a connection area between the connector 600 and the case 100.
In addition, by arranging the elastic tube 700, the shock absorption characteristic of the elastic tube 700 can be utilized to absorb the shock generated when the vehicle runs, so that the shock amplitude transmitted to the joint 600 is smaller, the structure of the welding part of the joint 600 and the catalyst 1 is further protected, the probability of damage to the welding part is reduced, and the sealing performance of the exhaust gas recirculation system 2 can be ensured.
Further, the ratio of the contact area of the curved end 610 with the casing 100 to the area of the catalyst return port 120 is 2 to 3. For example, the ratio of the contact area of the curved end 610 and the housing 100 to the area of the catalytic return port 120 may be 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, or 3, which may ensure that the welding area of the curved end 610 and the housing 100 is large, the connection is stable and the sealing performance is better, and the welding area of the curved end 610 and the housing 100 is much larger than the area of the catalytic return port 120, and the curved end 610 may surround the catalytic return port 120 in the circumferential direction of the catalytic return port 120, so as to ensure the reliable welding connection and improve the sealing performance between the joint 600 and the housing 100. Through multiple stress strength analysis tests, the optimal contact area under the welding process is set, and the welding reliability can be higher.
In some embodiments of the present invention, as shown in fig. 5, the exhaust gas recirculation system 2 further includes a cooler 800, a waste gas valve 810, an intake control valve 820, and a supercharger 830.
The cooler 800 is disposed on the exhaust gas return pipe 500, the exhaust gas valve 810 is disposed on the exhaust gas return pipe 500 and located on a side of the cooler 800 facing away from the catalyst 1, the air inlet control valve 820 is disposed on the air inlet pipe 400 and located between the air inlet 410 and the air return port 430, the supercharger 830 has a pressure end 831 and a vortex end 832, the pressure end 831 is disposed on the air inlet pipe 400 and located between the air inlet 420 and the air return port 430, and the vortex end 832 is disposed on the exhaust pipe.
Wherein, the cooler 800 can be used for cooling the high temperature waste gas in the waste gas muffler 500 to the temperature when making waste gas get into the intake pipe 400 is lower, like this, the temperature of the gas after waste gas and fresh air mix is too high, thereby reduces the risk of supercharger 830 surging, and improves the pressure boost efficiency who reduces supercharger 830, guarantees the reliable operation of supercharger 830.
In addition, the exhaust valve 810 can adjust the flow rate of exhaust gas in the exhaust gas return pipe 500, and the intake control valve 820 can adjust the flow rate of fresh air entering the intake pipe 400. For example, when the engine is not running, the exhaust valve 810 is closed in the initial state, and the intake control valve 820 is opened in the initial state, during the running of the engine, the engine needs to obtain the circulated exhaust gas, the exhaust valve 810 is gradually opened, and when the engine is in a working condition with a large demand for the circulated exhaust gas rate, the opening degree of the exhaust valve 810 can be increased and the intake control valve 820 can be appropriately closed to increase the rate of the exhaust gas entering the intake pipe 400, so that the exhaust gas circulation utilization rate can be improved.
The gas in the exhaust gas muffler 500 is cooled by the cooler 800 and then passes through the exhaust gas valve 810, so that the high-temperature gas in the exhaust gas muffler 500 can be prevented from damaging the exhaust gas valve 810, and the service life of the exhaust gas valve 810 is prolonged.
Furthermore, the air inlet control valve 820 is arranged between the air inlet 410 and the air return opening 430, and after the exhaust gas enters the air inlet pipe 400 through the air return opening 430, the exhaust gas can directly flow to the engine, that is, the air inlet control valve 820 does not block the circulation of the exhaust gas to enter the engine, and the exhaust gas and the fresh air can be mixed in the air inlet pipe 400 to enter the engine, so that the structure setting is more reasonable.
In addition, when the engine is working, the exhaust pipe can exhaust gas, the exhaust gas can push the vortex end 832 of the supercharger 830 to operate, the vortex end 832 transmits power to the pressure end 831, and the pressure end 831 of the supercharger 830 pressurizes the gas in the air inlet pipe 400, so that the circulated exhaust gas and fresh air can enter the engine more quickly.
An engine assembly according to an embodiment of the present invention is described below with reference to the accompanying drawings, the engine assembly including an engine having an intake end and an exhaust gas recirculation system 2 according to the above-described embodiment of the present invention.
The number of the intake manifolds corresponds to the number of cylinders of the engine, the number of the exhaust manifolds corresponds to the number of cylinders of the engine, the gas in the intake pipe 400 can enter each cylinder of the engine through the intake manifolds, and the exhaust gas generated after combustion of each cylinder can be discharged to the exhaust pipe through the intake manifolds.
According to the utility model discloses an engine assembly, through utilizing according to the utility model discloses exhaust gas recirculation system 2 of above-mentioned embodiment can carry out catalytic filtration to waste gas, has the advantage such as guaranteeing that waste gas is clean, exhaust gas pressure is sufficient and exhaust gas recirculation rate is high.
A vehicle according to an embodiment of the present invention is described below with reference to the accompanying drawings, the vehicle including an engine assembly according to the above-described embodiment of the present invention.
According to the utility model discloses vehicle, through utilizing according to the utility model discloses the engine assembly of above-mentioned embodiment can catalyze the filtration to waste gas, has advantages such as guaranteeing that waste gas is clean, exhaust pressure is sufficient and exhaust gas recirculation rate of utilization is high.
Other constituent examples and operations of the catalyst 1, the exhaust gas recirculation system 2, the engine assembly, and the vehicle according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A catalyst, comprising:
a housing having a catalytic gas inlet, a catalytic gas return and a catalytic gas outlet;
the first catalytic core and the second catalytic core are arranged in the shell, a middle air outlet cavity is formed between the first catalytic core and the second catalytic core, the first catalytic core is positioned between the catalytic air inlet and the middle air outlet cavity, the catalytic air return port is communicated with the middle air outlet cavity, and the second catalytic core is positioned between the catalytic air outlet and the middle air outlet cavity;
the volume of the first catalytic core is 40-60% of the volume of the second catalytic core.
2. The catalytic converter of claim 1, wherein the housing has a first end and a second end, the first catalytic core and the second catalytic core are arranged along an axial direction of the housing, the first end is located on a side of the first catalytic core away from the second catalytic core, the catalytic inlet is located at the first end, the catalytic outlet is located at the second end, and the catalytic return port is located at a circumferential surface of the housing.
3. An exhaust gas recirculation system, comprising:
the catalyst according to claim 1 or 2;
an intake pipe having an air inlet adapted to communicate with air, an air supply port adapted to communicate with an intake manifold of an engine, and a return air port located between the air inlet and the air supply port in a length direction of the intake pipe;
an exhaust pipe having one end in communication with the catalytic air inlet and another end adapted to communicate with an exhaust manifold of an engine;
and the waste gas return pipe is respectively communicated with the catalytic return port and the return port.
4. The exhaust gas recirculation system of claim 3, further comprising:
a fitting having a curved end that fits against the outer surface of the housing and communicates with the catalytic return air port;
and one end of the elastic pipe is communicated with the joint, and the other end of the elastic pipe is communicated with the waste gas return pipe.
5. An exhaust gas recirculation system according to claim 4, wherein the ratio of the contact area of the curved end with the housing to the area of the catalytic return port is 2-3.
6. The exhaust gas recirculation system of claim 3, further comprising:
the cooler is arranged on the exhaust gas return pipe;
a waste gas valve arranged on the waste gas return pipe and positioned on one side of the cooler back to the catalyst
The air inlet control valve is arranged on the air inlet pipe and is positioned between the air inlet and the air return port;
the supercharger is provided with a pressure end and a vortex end, the pressure end is arranged on the air inlet pipe and is positioned between the air supply port and the air return port, and the vortex end is arranged on the exhaust pipe.
7. An engine assembly, comprising:
an engine having an intake manifold and an exhaust manifold;
an exhaust gas recirculation system according to any one of claims 3-6.
8. A vehicle characterized by comprising an engine assembly according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220988397.XU CN217602753U (en) | 2022-04-26 | 2022-04-26 | Catalyst, exhaust gas recirculation system, engine assembly and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220988397.XU CN217602753U (en) | 2022-04-26 | 2022-04-26 | Catalyst, exhaust gas recirculation system, engine assembly and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN217602753U true CN217602753U (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220988397.XU Active CN217602753U (en) | 2022-04-26 | 2022-04-26 | Catalyst, exhaust gas recirculation system, engine assembly and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217602753U (en) |
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2022
- 2022-04-26 CN CN202220988397.XU patent/CN217602753U/en active Active
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