CN108104986B - Engine and mixed air inlet device thereof - Google Patents
Engine and mixed air inlet device thereof Download PDFInfo
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- CN108104986B CN108104986B CN201711441255.1A CN201711441255A CN108104986B CN 108104986 B CN108104986 B CN 108104986B CN 201711441255 A CN201711441255 A CN 201711441255A CN 108104986 B CN108104986 B CN 108104986B
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- 238000005260 corrosion Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 31
- 239000002912 waste gas Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/21—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system with EGR valves located at or near the connection to the intake system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/65—Constructional details of EGR valves
- F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The application discloses a mixed air inlet device of an engine, which comprises an air inlet pipeline, blades arranged in the air inlet pipeline and a flow control device used for adjusting the distance between two adjacent blades, wherein the side wall of the air inlet pipeline is provided with an exhaust gas inlet, the blades are arranged at the exhaust gas inlet end, the blades are multiple, the blades are annularly arranged, and an exhaust gas inlet space is formed between the blades and the side wall of the air inlet pipeline. Adjacent two blade intervals are adjusted through the flow control device, and then waste gas air inflow is adjusted, the condition of independently installing a valve body is avoided, and a plurality of blades are annularly arranged, so that waste gas is uniformly mixed with air after entering an air inlet pipeline, the condition of independently installing a mixer is avoided, and the whole volume of the mixed air inlet device is effectively reduced. The application also discloses an engine comprising the hybrid air inlet device.
Description
Technical Field
The application relates to the technical field of waste gas recycling, in particular to a mixed air inlet device of an engine. The application also relates to an engine comprising a hybrid air intake device.
Background
In recent years, exhaust pollution and CO of automobiles 2 The problems of the earth ecological environment damage and the greenhouse effect caused by emission are increasingly serious. The automobile with good pollution discharge and low fuel consumption rate can not only relieve the influence of climate warming and ecological environment balance destruction caused by the global warming effect. In order to reduce environmental pollution, EGR (Exhaust Gas Recirculation ) is widely used to reduce NOX emissions of an engine by re-introducing exhaust gas from the engine into an intake pipe and mixing fresh gas and then entering a combustion chamber for combustion.
In order to realize waste gas utilization, the air inlet of the traditional engine is provided with a mixed air inlet device, specifically, the traditional mixed air inlet device comprises an air inlet pipeline and an exhaust air inlet pipe connected to the side wall of the air inlet pipeline, an EGR valve is arranged on the exhaust air inlet pipe and is a butterfly valve or a poppet valve, namely, the EGR valve is independently arranged in an EGR loop and used for controlling the EGR flow. Wherein the air inlet pipeline is provided with a mixer for mixing air and waste gas.
However, since the valve body is required to be arranged on the exhaust gas inlet pipe to realize the control of the exhaust gas inlet amount, the mixer is required to be arranged on the gas inlet pipe to realize the mixing of air and exhaust gas, so that the whole volume of the mixed gas inlet device is larger.
Therefore, how to reduce the overall volume of the hybrid air intake device is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The object of the present application is to provide a hybrid air intake device of an engine, which is reduced in overall volume. Another object of the present application is to provide an engine comprising the air intake device described above.
In order to achieve the above purpose, the application provides a hybrid air inlet device of an engine, which comprises an air inlet pipeline, wherein an exhaust gas inlet is formed in the side wall of the air inlet pipeline, and the hybrid air inlet device is characterized by further comprising blades arranged in the air inlet pipeline and a flow control device for adjusting the distance between two adjacent blades, wherein the blades are arranged at the exhaust gas inlet end, the blades are multiple and are annularly arranged, and an exhaust gas inlet space is formed between each blade and the side wall of the air inlet pipeline.
Preferably, a plurality of blades are arranged in a circular ring, the central line of the circular ring coincides with the axis of the air inlet pipeline, and the distance between two adjacent blades is equal.
Preferably, the flow control device comprises a connecting piece, a fixed disc, a rotating disc and a driving device for driving the rotating disc to rotate, the fixed disc is fixed relative to the air inlet pipeline, the blade is connected with the fixed disc through a first pin shaft, the first pin shaft is in clearance fit with the fixed disc, a second pin shaft which is one-to-one arranged with the first pin shaft is fixedly connected to the rotating disc, the second pin shaft is rotatably connected with the connecting piece, the connecting piece is fixedly connected with the first pin shaft, and the first pin shaft and the blade are one-to-one corresponding.
Preferably, the flow control device includes two fixed disks and two rotating disks, the rotating disks correspond one-to-one to the fixed disks, and the two fixed disks are respectively arranged on opposite sides of the blade.
Preferably, the air inlet pipeline comprises an air inlet section, a blade mounting section and an air outlet section which are sequentially arranged along the air movement direction, the blades and the flow control device are positioned on the blade mounting section, the inner diameter of the fixed disc is equal to that of the air inlet section, the inner diameter of the air inlet section is equal to that of the air outlet section, the rotating disc is sleeved on the outer side of the fixed disc, and the outer side face of the rotating disc is in clearance fit with the side wall of the blade mounting section.
Preferably, the blade mounting section and the air outlet section are of an integrally formed structure, and the blade mounting section is detachably connected with the air inlet section.
Preferably, the blade has a cross section perpendicular to the axial direction of the intake duct, which is a fusiform cross section.
Preferably, the blade is an integrally formed structure.
Preferably, the surface of the blade is provided with an anti-corrosion layer.
An engine comprises an engine body and a mixed air inlet device connected with an air inlet of the engine body, wherein the mixed air inlet device of the engine is any one of the mixed air inlet devices.
In the technical scheme, the mixed air inlet device of the engine comprises an air inlet pipeline, blades arranged in the air inlet pipeline and a flow control device for adjusting the distance between two adjacent blades, wherein the side wall of the air inlet pipeline is provided with an exhaust gas inlet, the blades are arranged at the exhaust gas inlet end, the blades are multiple and are annularly arranged, and an exhaust gas inlet space is formed between the blades and the side wall of the air inlet pipeline. In a specific working process, when the engine works, the distance between two adjacent blades is adjusted through the flow control device, so that the control of the air inflow of waste gas is realized, waste gas enters the air inlet pipeline through the distance between the two adjacent blades to be mixed with air, and finally, the waste gas is conveyed to the inside of the engine main body through the air inlet pipeline.
According to the mixing air inlet device provided by the application, the distance between the two adjacent blades is adjusted through the flow control device, so that the adjustment of the air inflow of the waste gas is realized, the condition of independently installing the valve body is avoided, and the plurality of blades are annularly arranged, so that the waste gas is uniformly mixed with air after entering the air inlet pipeline, the condition of independently installing a mixer is avoided, and the whole volume of the mixing air inlet device is effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the drawings provided without inventive effort for a person skilled in the art.
FIG. 1 is a three-dimensional structure diagram of a hybrid air intake device blade in an open state according to an embodiment of the present application;
FIG. 2 is a three-dimensional view of a hybrid air intake device according to an embodiment of the present application;
FIG. 3 is a schematic view of a vane of a hybrid air intake device according to an embodiment of the present application in an open state;
FIG. 4 is a schematic view of the structure of the hybrid air intake device shown in FIG. 3 along the direction A-A;
FIG. 5 is a schematic view of the structure of the hybrid air intake device shown in FIG. 3 along the direction B-B;
FIG. 6 is a top view of a hybrid air intake device vane in a closed position according to an embodiment of the present application;
FIG. 7 is a three-dimensional structure diagram of a blade of a hybrid air intake device in a closed state according to an embodiment of the present application;
FIG. 8 is a three-dimensional view of a hybrid air intake device according to an embodiment of the present application;
FIG. 9 is a schematic view of a vane of a hybrid air intake device according to an embodiment of the present application in a closed state;
FIG. 10 is a schematic view of the structure of the hybrid air intake device of FIG. 9 along the direction C-C;
FIG. 11 is a schematic view of the structure of the hybrid air intake device of FIG. 9 along the direction D-D;
fig. 12 is a top view of a blade of a hybrid air intake device according to an embodiment of the present application in a closed state.
Wherein in fig. 1-12: the device comprises a 1-air outlet section, a 2-fixed disc, 3-blades, a 4-second pin shaft, a 5-rotating disc, a 6-connecting piece, a 7-air inlet section, 8-threaded fasteners and a 9-blade mounting section.
Detailed Description
The core of the application is to provide a hybrid air intake device of an engine, which has a reduced overall volume. It is another object of the present application to provide an engine including the above-described air intake device.
In order to better understand the technical solutions of the present application, the present application will be further described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1 to 12, in a specific embodiment, a hybrid air intake device of an engine according to an embodiment of the present application includes an air intake pipe, a vane 3 disposed in the air intake pipe, and a flow control device for adjusting a distance between two adjacent vanes 3, wherein an exhaust gas inlet is formed in a side wall of the air intake pipe, the vane 3 is disposed at an exhaust gas inlet end, the plurality of vanes 3 are disposed in a ring shape, and an exhaust gas air intake space is formed between the vane 3 and a side wall of the air intake pipe. Since the exhaust gas is usually at a high temperature, it is preferable that the blades 3 are metal blades, and may be steel structures, in order to extend the service life of the hybrid air intake device.
In a specific working process, when the engine works, the distance between two adjacent blades 3 is adjusted through the flow control device, so that the control of the air inflow of waste gas is realized, and the waste gas enters the air inlet pipeline through the distance between the two adjacent blades 3 to be mixed with air and finally is conveyed into the engine main body through the air inlet pipeline.
Specifically, during operation, the air flow direction: exhaust gas enters from an inlet a1 of the mixing pipe, passes through a region b between the outer contour of the blade 3 group and the air inlet pipeline, passes through a region c between adjacent blades 3, and enters into a gas passage of the air inlet pipeline; at this time, the inlet a2 of the fresh air intake duct enters the gas passage of the intake duct. The two gases are mixed in the flowing process and flow out from the air outlet d of the air inlet pipeline.
As can be seen from the above description, in the mixing air inlet device provided in the specific embodiment of the present application, the distance between two adjacent blades 3 is adjusted by the flow control device, so as to further adjust the amount of exhaust gas intake, avoiding the situation of separately installing a valve body, and since the plurality of blades 3 are annularly arranged, exhaust gas is uniformly mixed with air after entering an air inlet pipe, avoiding the situation of separately installing a mixer, that is, changing the area of the exhaust gas entering the air channel, and realizing EGR flow control; waste gas enters from the blades 3 to form annular air inlet, so that uniform mixing of EGR is realized, the functions of controlling EGR flow and controlling mixing uniformity are realized, and the functions are integrated into one module, so that the whole volume of the mixed air inlet device is effectively reduced.
Preferably, the plurality of blades 3 are arranged in a circular ring, the center line of the circular ring coincides with the axis of the air inlet pipeline, and the distance between two adjacent blades 3 is equal.
Preferably, the flow control device comprises a connecting piece 6, a fixed disc 2, a rotating disc 5 and a driving device for driving the rotating disc 5 to rotate, the driving device can be a rotary cylinder or a motor and the like, the motor can drive the rotating disc 5 to rotate through a gear transmission device, preferably, the motor is a stepping motor, the fixed disc 2 is fixed relative to an air inlet pipeline, the blades 3 are connected with the fixed disc 2 through first pin shafts, the first pin shafts are in clearance fit with the fixed disc 2, second pin shafts 4 which are arranged one to one with the first pin shafts are fixedly connected to the rotating disc 5, the second pin shafts 4 are rotatably connected with the connecting piece 6, the connecting piece 6 is fixedly connected with the first pin shafts, and the first pin shafts and the blades 3 are in one to one correspondence.
In order to improve stability, it is preferable that the flow control device includes two fixed disks 2 and two rotating disks 5, the rotating disks 5 are in one-to-one correspondence with the fixed disks 2, the two fixed disks 2 are respectively arranged on opposite sides of the vane 3, and specifically, each rotating disk 5 has a connector 6 corresponding thereto.
In another embodiment, the flow control device includes a fixed disc 2, a rotating disc 5, and a driving device for driving the rotating disc 5 to rotate, where the driving device may be a rotary cylinder or a motor, and the vane 3 is provided with a first rotating shaft rotatably connected to the fixed disc 2 and a second rotating shaft connected to the rotating disc 5, and the rotating disc 5 is provided with a chute for sliding the second rotating shaft.
Since the exhaust gas needs to enter the gas channel from the channel c among the blades 3 to be mixed with fresh gas, after the angle among the blades 3 is changed, the air inlet section formed by the blade 3 group is changed, thereby realizing the control of the EGR flow. As shown in fig. 1, the vanes 3 are in the fully opened arrangement, the area of the region C between the vanes 3 is large, and the EGR flow rate is large; as shown in fig. 7, the area of the region C between the vanes 33 is small, the EGR flow rate is small, and the minimum achievable EGR flow rate is zero.
Specifically, the air inlet pipeline comprises an air inlet section 7, a blade mounting section 9 and an air outlet section 1 which are sequentially arranged along the air movement direction, and the blade 3 and the flow control device are positioned on the blade mounting section 9. Specifically, the air inlet section 7, the blade 3 installation section and the air outlet section 1 are detachably connected.
In order to reduce the obstruction to the air flow, preferably, the inner diameter of the fixed disk 2 is equal to the inner diameter of the air inlet section 7, the inner diameter of the air inlet section 7 is equal to the inner diameter of the air outlet section 1, the rotating disk 5 is sleeved outside the fixed disk 2, and the outer side surface of the rotating disk 5 is in clearance fit with the side wall of the blade mounting section 9, namely, the inner wall of the air inlet pipeline is in smooth transition.
In order to facilitate the disassembly and assembly of the mixed air inlet device, preferably, the blade mounting section 9 and the air outlet section 1 are of an integrally formed structure, and the blade mounting section 9 is detachably connected with the air inlet section 7. Specifically, the blade mounting section 9 and the air intake section 7 are provided with a first flange end and a second flange end, respectively, wherein the first flange end and the second flange end are connected by means of threaded fasteners 8, preferably, the plurality of threaded fasteners 8 are evenly distributed along the circumferential direction of the blade mounting section 9. The blade mounting section 9 is detachably connected with the air inlet section 7, so that the blades 3 can be cleaned at a later stage.
In order to extend the service life of the vane 3, it is preferable that the cross section of the vane 3 in the direction perpendicular to the axis of the intake duct is a shuttle-shaped cross section, that is, the middle of the vane 3 is thick and thin on both sides.
In order to facilitate processing of the blade 3 and improve processing efficiency, it is preferable that the blade 3 is of an integrally formed structure.
On the basis of the above-mentioned aspects, in order to prolong the service life of the hybrid air intake device, it is preferable that the surface of the vane 3 is provided with an anti-corrosion layer.
The engine provided by the application comprises an engine body and a mixed air inlet device connected to an air inlet of the engine body, wherein the mixed air inlet device of the engine is any one of the mixed air inlet devices.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts of each embodiment are mutually referred to.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. 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 application. Thus, the present application 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 (9)
1. The mixed air inlet device of the engine comprises an air inlet pipeline, wherein an exhaust gas inlet is formed in the side wall of the air inlet pipeline, and the mixed air inlet device is characterized by further comprising blades (3) arranged in the air inlet pipeline and a flow control device used for adjusting the distance between two adjacent blades (3), wherein the blades (3) are arranged at the exhaust gas inlet end, the blades (3) are multiple, the blades (3) are annularly arranged, and an exhaust gas inlet space is formed between each blade (3) and the side wall of the air inlet pipeline;
the flow control device comprises a connecting piece (6), a fixed disc (2), a rotating disc (5) and a driving device for driving the rotating disc (5) to rotate, wherein the fixed disc (2) is fixed relative to an air inlet pipeline, the blade (3) is connected with the fixed disc (2) through a first pin shaft, the first pin shaft is in clearance fit with the fixed disc (2), a second pin shaft (4) which is arranged on the rotating disc (5) one to one, the second pin shaft (4) is rotatably connected with the connecting piece (6), and the connecting piece (6) is fixedly connected with the first pin shaft and corresponds to the blade (3) one to one.
2. A hybrid air inlet device according to claim 1, characterized in that a plurality of said vanes (3) are arranged in a circular ring with the circular ring centre line coinciding with the air inlet duct axis, the spacing between adjacent two of said vanes (3) being equal.
3. A hybrid air inlet device according to claim 1, characterized in that the flow control means comprise two said fixed discs (2) and two said rotating discs (5), said rotating discs (5) being in one-to-one correspondence with said fixed discs (2), the two fixed discs (2) being arranged on opposite sides of the blade (3), respectively.
4. The mixing air inlet device according to claim 3, wherein the air inlet pipeline comprises an air inlet section (7), a blade mounting section (9) and an air outlet section (1) which are sequentially arranged along the air movement direction, the blade (3) and the flow control device are positioned on the blade mounting section (9), the inner diameter of the fixed disc (2) is equal to the inner diameter of the air inlet section (7), the inner diameter of the air inlet section (7) is equal to the inner diameter of the air outlet section (1), the rotating disc (5) is sleeved outside the fixed disc (2), and the outer side surface of the rotating disc (5) is in clearance fit with the side wall of the blade mounting section (9).
5. The hybrid air inlet device according to claim 4, characterized in that the blade mounting section (9) is of an integrally formed structure with the air outlet section (1), the blade mounting section (9) being detachably connected with the air inlet section (7).
6. A hybrid air intake device according to claim 1, wherein the blade (3) has a fusiform cross section in a direction perpendicular to the axis of the air intake duct.
7. A hybrid air inlet device according to claim 6, characterized in that the blade (3) is of integrally formed construction.
8. A hybrid air inlet device according to any one of claims 1-7, characterized in that the surface of the blade (3) is provided with a corrosion protection layer.
9. An engine comprising an engine block and a hybrid air intake device coupled to an air intake of the engine block, wherein the engine hybrid air intake device is the hybrid air intake device of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711441255.1A CN108104986B (en) | 2017-12-27 | 2017-12-27 | Engine and mixed air inlet device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711441255.1A CN108104986B (en) | 2017-12-27 | 2017-12-27 | Engine and mixed air inlet device thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN108104986A CN108104986A (en) | 2018-06-01 |
| CN108104986B true CN108104986B (en) | 2023-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711441255.1A Active CN108104986B (en) | 2017-12-27 | 2017-12-27 | Engine and mixed air inlet device thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019127098A1 (en) * | 2017-12-27 | 2019-07-04 | 潍柴动力股份有限公司 | Engine and mixed-gas intake device thereof |
| CN109798205B (en) * | 2019-04-11 | 2024-01-12 | 潍柴动力股份有限公司 | EGR (exhaust gas recirculation) mixer and engine with same |
| CN114673611B (en) * | 2022-04-14 | 2023-06-02 | 中国第一汽车股份有限公司 | Exhaust gas recirculation mixing device, exhaust gas recirculation system and vehicle |
| CN115059562B (en) * | 2022-05-25 | 2024-04-12 | 中国第一汽车股份有限公司 | EGR (exhaust gas recirculation) mixer, EGR system and control method of EGR system |
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