CN211975216U - EGR corrugated pipe, EGR system and engine - Google Patents
EGR corrugated pipe, EGR system and engine Download PDFInfo
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- CN211975216U CN211975216U CN201922387238.5U CN201922387238U CN211975216U CN 211975216 U CN211975216 U CN 211975216U CN 201922387238 U CN201922387238 U CN 201922387238U CN 211975216 U CN211975216 U CN 211975216U
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Abstract
The utility model discloses an EGR corrugated pipe, an EGR system and an engine, wherein the EGR corrugated pipe comprises an annular corrugated pipe body, and at least one of the corrugated top of the corrugated section and the straight pipe section of the annular corrugated pipe body is provided with radiating fins arranged along the circumferential direction; through set up radiating fin outside the EGR bellows, the area of contact of EGR bellows and air has been increased, the heat-sinking capability of EGR bellows has been improved, the function that makes the EGR bellows no longer limits in the connection, can also dispel the heat to the EGR waste gas of EGR bellows of flowing through, help reducing the cooling pressure with the EGR cooler that this EGR bellows is connected, thereby make the EGR cooler reduce to the total amount of coolant liquid and the requirement of flow, can realize the miniaturization of EGR cooler, be convenient for whole car arranges, and EGR pipeline cooling rate accelerates after the parking, can effectively reduce the probability that takes place the scald accident.
Description
Technical Field
The utility model relates to the technical field of engines, in particular to EGR bellows, EGR system and engine.
Background
In order to meet the increasingly strict emission standard, the EGR exhaust gas recirculation system has wide application, the EGR system cools the discharged exhaust gas and introduces the cooled exhaust gas into an air inlet pipeline, the temperature during in-cylinder combustion is reduced, and NO is effectively inhibitedxCan ensure the EGR rate of the engine under various working conditions and further reduce NOxAnd (4) discharging.
In the prior art, as shown in fig. 1, the inlet and outlet pipes of the LP-EGR system and the outlet pipe of the HP-EGR system are both long, and the long pipes occupy a large space and are only connected, so that the space utilization rate is low, and the cooling of the EGR exhaust gas is completely performed by depending on the LP-EGR cooler or the HP-EGR cooler, so that the LP-EGR cooler and the HP-EGR cooler have large volumes, and have high requirements on the total amount and flow of the coolant, and the whole vehicle layout is inconvenient.
SUMMERY OF THE UTILITY MODEL
In view of this, an object of the utility model is to provide an EGR bellows to share the cooling pressure of EGR cooler, realize the miniaturization of EGR cooler, be convenient for put in order car and arrange.
Another object of the utility model is to provide an EGR system and engine based on above-mentioned EGR bellows.
In order to achieve the above object, the utility model provides a following technical scheme:
an EGR corrugated pipe comprises an annular corrugated pipe body, and at least one of the corrugated top of a corrugated section and a straight pipe section of the annular corrugated pipe body is provided with radiating fins arranged along the circumferential direction.
Preferably, the radiating fins are arranged on the corrugated top of the corrugated section of the annular corrugated pipe body and the straight pipe section, and the outer edges of the radiating fins on the corrugated top and the outer edges of the radiating fins on the straight pipe section are in a same cylindrical surface.
Preferably, the heat dissipation fin is of an annular sheet structure.
Preferably, the outer edge of the heat dissipation fin is provided with a heat insulation structure.
Preferably, the heat insulation structure comprises a heat insulation layer and an annular hoop, the heat insulation layer is arranged on the outer edge of the radiating fin along the circumferential direction, and the annular hoop wraps the heat insulation layer and fixes the heat insulation layer on the outer edge of the radiating fin.
Preferably, the thickness of the annular band does not exceed the thickness of the corrugations of the corrugated section of the annular corrugated tube body.
An EGR system comprises an EGR cooler, wherein two ends of the EGR cooler are respectively communicated with an air inlet channel and an air outlet channel of an engine, and the EGR cooler is connected with the air inlet channel and/or the EGR cooler is connected with the air outlet channel through the EGR corrugated pipe.
An engine, an EGR system as above is arranged between an air inlet channel and an air outlet channel of the engine.
In order to achieve the above object, the utility model provides an EGR corrugated pipe, which comprises an annular corrugated pipe body, wherein at least one of the corrugated top and the straight pipe section of the corrugated section of the annular corrugated pipe body is provided with radiating fins arranged along the circumferential direction, and each radiating fin can be of an integral sheet structure or formed by a plurality of small fins uniformly distributed along the circumferential direction; through set up radiating fin outside the EGR bellows, the area of contact of EGR bellows and air has been increased, the heat-sinking capability of EGR bellows has been improved, the function that makes the EGR bellows no longer limits in the connection, can also dispel the heat to the EGR waste gas of EGR bellows of flowing through, help reducing the cooling pressure with the EGR cooler that this EGR bellows is connected, thereby make the EGR cooler reduce to the total amount of coolant liquid and the requirement of flow, can realize the miniaturization of EGR cooler, be convenient for whole car arranges, and EGR pipeline cooling rate accelerates after the parking, can effectively reduce the probability that takes place the scald accident.
The utility model also provides a EGR system and engine, this EGR system and engine include foretell EGR bellows, because above-mentioned EGR bellows has above-mentioned beneficial effect, then adopt the EGR system and the engine of this EGR bellows to have above-mentioned beneficial effect equally.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art EGR system;
fig. 2 is an isometric view of an EGR bellows provided by an embodiment of the present invention;
fig. 3 is a cross-sectional view of an EGR bellows provided in an embodiment of the present invention;
fig. 4 is an axonometric view of the annular clamp of the EGR bellows provided in the embodiment of the present invention.
In the figure:
1 is an annular corrugated pipe body; 101 is a corrugated section; 102 is a straight tube section; 2 is a radiating fin; a heat insulation layer 3; and 4, an annular hoop.
Detailed Description
One of the cores of the utility model is to provide an EGR corrugated pipe, the structural design of this EGR corrugated pipe makes its cooling pressure that can share the EGR cooler, realizes the miniaturization of EGR cooler, and the whole car of being convenient for is arranged.
The utility model discloses an another core lies in providing an EGR system and engine based on above-mentioned EGR bellows.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 2 and 3, fig. 2 is an isometric view of an EGR bellows provided in an embodiment of the present invention, and fig. 3 is a sectional view of the EGR bellows provided in an embodiment of the present invention.
The embodiment of the utility model provides a pair of EGR bellows, this EGR bellows include cyclic annular bellows body 1, and at least one department in the ripple top of the ripple section 101 of cyclic annular bellows body 1 and straight tube section 102 is provided with along the radiating fin 2 that circumference was arranged, and every radiating fin 2 can be whole lamellar structure, also can be that there are a plurality of small-size fins to constitute along the circumference equipartition.
Compared with the prior art, the embodiment of the utility model provides an EGR bellows is through setting up radiating fin 2 on the outer wall, the area of contact of EGR bellows and air has been increased, the heat-sinking capability of EGR bellows has been improved, the function that makes the EGR bellows no longer restricts to connecting, can also dispel the heat to the EGR waste gas of the EGR bellows of flowing through, help reducing the cooling pressure with the EGR cooler of this EGR bellows connection, thereby make the EGR cooler reduce to the total amount of coolant liquid and the requirement of flow, can realize the miniaturization of EGR cooler, be convenient for whole car is arranged, and EGR pipeline cooling rate accelerates after the parking, can effectively reduce the probability of taking place the scald accident.
Preferably, in the embodiment of the present invention, as shown in fig. 2, the corrugated tops of the corrugated sections 101 of the annular corrugated tube body 1 and the straight tube sections 102 are both provided with the heat dissipation fins 2, and the outer edges of the heat dissipation fins 2 at the corrugated tops and the outer edges of the heat dissipation fins 2 at the straight tube sections 102 are concentric cylinders.
Further, as shown in fig. 3, the heat dissipation fins 2 are in an annular sheet structure, and the thickness of the heat dissipation fins 2 does not exceed the corrugation thickness of the corrugated section 101 of the annular corrugated tube body 1.
In the engine operation in-process, EGR bellows surface temperature is higher, and generally exposes in the engine outside, takes place the scald accident easily among maintenance, the operation of taking a trial run, and radiating fin 2's outward flange is provided with thermal-insulated structure, and this thermal-insulated structure can prevent that EGR bellows surface temperature is too high, avoids scalding.
Further optimize above-mentioned technical scheme, heat insulation structure includes insulating layer 3 and annular clamp 4, and annular clamp 4 structure is shown in figure 4, and insulating layer 3 sets up in radiating fin 2's outward flange along circumference, and annular clamp 4 parcel insulating layer 3 and fix insulating layer 3 at radiating fin 2's outward flange.
Of course, the above-mentioned heat insulation structure is only a preferred embodiment provided by the embodiment of the present invention, and actually, the heat insulation structure is not limited thereto, and the heat insulation structure may also be a heat insulation coating layer disposed on the outer edge of the heat dissipating fin 2.
Further optimizing above-mentioned technical scheme, in order to avoid influencing radiating fin 2 heat dissipation, the thickness of annular clamp 4 does not exceed the thickness of the ripple section 101 of cyclic annular bellows body 1 to make and form sufficient clearance so that dispel the heat between the adjacent annular clamp 4.
Based on above-mentioned EGR bellows, the embodiment of the utility model provides a still provides an EGR system, and this EGR system includes the EGR cooler, the both ends of EGR cooler communicate with the inlet channel and the air outlet channel of engine respectively, between EGR cooler and the inlet channel and/or between EGR cooler and the air outlet channel through as above arbitrary one EGR bellows joint, because above-mentioned EGR bellows has above-mentioned technological effect, then adopt the technological effect of the EGR system of this EGR bellows to please refer to above-mentioned embodiment.
Further, based on above-mentioned EGR system, the embodiment of the utility model provides an engine is still provided, be provided with between the inlet channel of engine and the air outlet channel as above EGR system, this engine has adopted above-mentioned EGR system, then the technological effect of engine please refer to above-mentioned embodiment.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The EGR corrugated pipe is characterized by comprising an annular corrugated pipe body, wherein at least one of the corrugated top of a corrugated section and a straight pipe section of the annular corrugated pipe body is provided with radiating fins arranged along the circumferential direction, and the outer edges of the radiating fins are provided with heat insulation structures.
2. The EGR bellows according to claim 1, wherein the radiating fins are provided on both the corrugated top portion of the corrugated section of the annular bellows body and the straight tube section, and outer edges of the radiating fins on the corrugated top portion and outer edges of the radiating fins on the straight tube section are in a cylindrical shape.
3. The EGR bellows of claim 1 or 2, wherein the heat radiating fins are of annular sheet-like structure.
4. The EGR bellows according to claim 1 or 2, wherein the heat insulating structure includes a heat insulating layer provided circumferentially to an outer edge of the radiating fin, and an annular collar that wraps the heat insulating layer and fixes the heat insulating layer to the outer edge of the radiating fin.
5. The EGR bellows of claim 4, wherein a thickness of the annular band does not exceed a thickness of corrugations of the corrugated section of the annular bellows body.
6. An EGR system comprising an EGR cooler having both ends respectively communicating with an intake passage and an exhaust passage of an engine, characterized in that the EGR cooler and the intake passage and/or the EGR cooler and the exhaust passage are connected by an EGR bellows according to any one of claims 1 to 5.
7. An engine characterized in that an EGR system according to claim 6 is provided between an intake passage and an exhaust passage of the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922387238.5U CN211975216U (en) | 2019-12-25 | 2019-12-25 | EGR corrugated pipe, EGR system and engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922387238.5U CN211975216U (en) | 2019-12-25 | 2019-12-25 | EGR corrugated pipe, EGR system and engine |
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| Publication Number | Publication Date |
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| CN211975216U true CN211975216U (en) | 2020-11-20 |
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| CN201922387238.5U Active CN211975216U (en) | 2019-12-25 | 2019-12-25 | EGR corrugated pipe, EGR system and engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915033A (en) * | 2021-11-12 | 2022-01-11 | 北京美联桥科技集团有限公司 | Heavy EGR cooler with damping structure |
-
2019
- 2019-12-25 CN CN201922387238.5U patent/CN211975216U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915033A (en) * | 2021-11-12 | 2022-01-11 | 北京美联桥科技集团有限公司 | Heavy EGR cooler with damping structure |
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