CN116241390B - EGR system and water removal device thereof - Google Patents
EGR system and water removal device thereof Download PDFInfo
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- CN116241390B CN116241390B CN202310526665.5A CN202310526665A CN116241390B CN 116241390 B CN116241390 B CN 116241390B CN 202310526665 A CN202310526665 A CN 202310526665A CN 116241390 B CN116241390 B CN 116241390B
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- sleeve
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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
- F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
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- 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
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention discloses a water removing device of an EGR system, which comprises a sleeve, an inlet cone and an outlet reflux assembly; the inlet cone is inserted and plugged at the inlet end of the sleeve; the inlet cone is provided with a conical air inlet cavity with the cross section area gradually reduced along the preset direction; the conical air inlet cavity is only opened at one end with a large cross-sectional area; the preset direction is the direction from the inlet end to the outlet end of the sleeve; the side wall of the inlet cone is provided with a through hole for guiding waste gas in the conical air inlet cavity to spray to the inner wall of the sleeve; the outlet return assembly is disposed at the outlet end of the sleeve and forms a serpentine channel for exhausting exhaust gases from the sleeve. The inlet cone guides the exhaust gas to spray to the inner wall of the sleeve, so that condensed water in the exhaust gas is attached to the inner wall of the sleeve and separated from the exhaust gas; the outlet backflow component is provided with the serpentine channel to discharge waste gas, so that condensed water in the waste gas is attached to and separated from the waste gas when the condensed water impinges on the wall surface of the serpentine channel, and the condensed water in the waste gas is effectively removed. The invention also discloses an EGR system applying the water removing device.
Description
Technical Field
The invention relates to the technical field of engine exhaust gas application, in particular to a water removal device of an EGR system and the EGR system.
Background
An EGR (Exhaust Gas recirculation) system is effective in reducing engine emissions, including EGR valves, EGR coolers, mixers, superchargers, and piping connecting the devices. Devices in an EGR system are typically arranged in staggered fashion, such as the EGR cooler itself is bulky and limited by the space available for the engine to be disposed entirely above the engine, while the supercharger, EGR valve and mixer are typically disposed below the EGR cooler.
The moisture content of the exhaust gas in the EGR system exceeds 12 percent, and the moisture is in a gaseous state under a common working condition and can enter an engine cylinder along with the movement of the exhaust gas. When the external temperature is low, the engine is stopped or the engine is in idle working condition, the moisture of the exhaust gas in the EGR system can become condensed water to be attached to the inner wall of the pipeline, the condensed water has certain corrosiveness, and devices (such as a supercharger, an EGR valve and a mixer) which are returned to a low position can cause damage such as oxidation and corrosion, so that the reliability of the whole engine is poor.
In addition, when the engine runs in a cold region, condensed water on the inner wall of the pipeline flows back to a low-level device to be easy to freeze, so that blockage is caused, and air intake of the engine is influenced.
Therefore, how to effectively remove the condensate water of the exhaust gas in the EGR system, avoid the condensate water adhering to the pipeline and reflowing to the low-level device of the EGR system to cause damage such as oxidation, corrosion and the like, and improve the reliability of the whole engine, is a problem to be solved by the skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a water removing device of an EGR system, in which, when the external temperature is low, the engine is stopped or the engine is idling, the inlet cone directs the exhaust gas to spray toward the inner wall of the sleeve, so that the condensed water in the exhaust gas adheres to the inner wall of the sleeve and is separated from the exhaust gas; meanwhile, the outlet backflow component is provided with the serpentine channel to discharge waste gas, condensed water in the waste gas is attached to and separated from the waste gas when impacting the wall surface of the serpentine channel, condensed water in the waste gas is effectively removed, the condition that condensed water in an EGR system is backflow to a low-position device in a pipeline is avoided, the low-position device is protected from oxidation and corrosion of the condensed water, and the reliability of the whole engine is improved. The invention also provides an EGR system applying the water removal device, which can protect devices at low positions in the system from oxidation and corrosion of condensed water and improve the reliability of the whole engine.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a water removal device for an EGR system, comprising:
a sleeve;
an inlet cone, which is inserted into and seals the inlet end of the sleeve; the inlet cone is provided with a conical air inlet cavity with the cross section area gradually decreasing along a preset direction; the conical air inlet cavity is only opened at one end with a large cross-sectional area; the preset direction is from the inlet end to the outlet end of the sleeve; the side wall of the inlet cone is provided with a through hole for guiding the exhaust gas in the conical air inlet cavity to spray to the inner wall of the sleeve;
and the outlet backflow assembly is arranged at the outlet end of the sleeve and forms a serpentine channel, and the serpentine channel is used for discharging waste gas in the sleeve.
Optionally, in the water removal device, the outlet backflow assembly includes:
the guide cone is arranged in the sleeve and is provided with a guide cone cavity with a cross-sectional area gradually increasing along a preset direction, and only one end with a large cross-sectional area of the guide cone cavity is opened;
an outlet cone inserted and blocked at the outlet end of the sleeve; the outlet cone is provided with a conical air outlet cavity with the cross-sectional area gradually increasing along a preset direction; the end of the conical air outlet cavity with a large cross section area and the end with a small cross section area are both opened;
the outer wall of the guide cone is used for guiding the waste gas in the sleeve to reach the outer wall of the outlet cone, and the outer wall of the outlet cone can guide the waste gas to enter the guide cone cavity and then be discharged by the cone-shaped air outlet cavity.
Optionally, in the water removing device, the guide cone and the inlet cone are of an integrated structure, and the joint of the guide cone and the inlet cone is in smooth transition.
Optionally, in the water removing device, a first flange is arranged at the end part of the inlet cone, and the first flange and an inlet flange at the inlet end in the sleeve are arranged in a stacked manner and fixed with each other; a gap seal between the first flange and the inlet flange;
the end part of the outlet cone is provided with a second flange, and the second flange and the outlet flange at the outlet end in the sleeve are arranged in a lamination manner and are mutually fixed; and a gap seal between the second flange and the outlet flange.
Optionally, in the water removing device, the number of through holes in the side wall of the inlet cone is multiple, and the aperture of each through hole is gradually reduced along the preset direction.
Optionally, in the water removing device, the through holes are circumferentially arranged into circles, and a plurality of circles of through holes are arranged along the preset direction; or alternatively
The through holes are arranged in rows along the direction of the generatrix of the inlet cone, and a plurality of rows are arranged along the circumferential direction.
Optionally, in the water removing device, a liquid outlet is arranged on the side wall of the sleeve, and a liquid outlet valve is arranged at the liquid outlet;
the side wall of one side of the sleeve, which is provided with the liquid outlet, is inclined, the height of the side wall is gradually reduced along the preset direction, and a water retaining protrusion is arranged at the inner side of the lowest part; the liquid outlet is close to the water retaining protrusion.
Optionally, in the water removing device, the sleeve is a conical cylinder, and the cross-sectional area of the sleeve gradually increases along the preset direction; the water retaining protrusion is annular and is of an integrated structure with the sleeve.
Optionally, in the water removing device, the liquid discharging valve is controlled by an electronic control unit, a liquid level sensor in signal connection with the electronic control unit is arranged in the sleeve,
when the liquid level in the sleeve reaches a limit water level, the electronic control unit controls the liquid discharge valve to be opened; when the liquid level in the sleeve reaches a specified water level, the electronic control unit controls the liquid discharge valve to be closed.
An EGR system comprises a water removal device, wherein the water removal device is any one of the water removal devices in the technical scheme.
The invention provides a water removing device of an EGR system, which comprises a sleeve, an inlet cone and an outlet reflux assembly; the inlet cone is inserted and plugged at the inlet end of the sleeve; the inlet cone is provided with a conical air inlet cavity with the cross section area gradually reduced along the preset direction; the conical air inlet cavity is only opened at one end with a large cross-sectional area; the preset direction is the direction from the inlet end to the outlet end of the sleeve; the side wall of the inlet cone is provided with a through hole for guiding waste gas in the conical air inlet cavity to spray to the inner wall of the sleeve; the outlet return assembly is disposed at the outlet end of the sleeve and forms a serpentine channel for exhausting exhaust gases from the sleeve.
When the water removing device of the EGR system is applied, if the external temperature is lower, the engine is stopped or the engine is idling, waste gas of the EGR system is firstly led into the conical air inlet cavity of the inlet cone, the conical air inlet cavity is in a tapered structure, the waste gas is accelerated and is collided to the inner wall of the sleeve through the through hole, so that condensed water in the waste gas is attached to the inner wall of the sleeve, then the waste gas reaches the outlet reflux assembly along the sleeve and enters the serpentine channel, and condensed water is attached to and separated from the waste gas when the waste gas repeatedly collides with the wall surface of the serpentine channel in the serpentine channel.
Therefore, the waste gas entering the water removing device is separated from condensed water at the inlet end and the outlet end of the sleeve respectively, a good water removing effect can be achieved, the condition that condensed water is attached in a pipeline of the EGR system is avoided, the condition that the condensed water flows back to a low-position device is avoided, the low-position device is protected from oxidation and corrosion of the condensed water, and the reliability of the whole engine is improved.
Meanwhile, in the water removal device, the inlet cone body can accelerate waste gas, so that the flow speed of the waste gas in the serpentine channel is improved, the effect that the waste gas impacts the inner wall of the serpentine channel to enable condensed water to adhere to and separate from the waste gas is further improved, the water removal function of the serpentine channel is fully exerted, and the water removal effect of the whole water removal device is improved.
In addition, the water removing device of the EGR system can effectively remove condensed water in waste gas, and even when the engine runs in a cold region, the condensed water can be prevented from adhering to the pipeline of the EGR system, the situation that the condensed water flows back to a low-level device to freeze to cause blockage is prevented, and smooth air intake of the engine is ensured.
The invention also provides an EGR system applying the water removal device, which can protect devices at low positions in the system from oxidation and corrosion of condensed water and improve the reliability of the whole engine.
Drawings
In order to more clearly illustrate the embodiments of the invention 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, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a water removal device of an EGR system provided by an embodiment of the present invention;
FIG. 2 is a schematic view of an integrated structure formed by an inlet cone and a guide cone according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a sleeve provided by an embodiment of the present invention;
FIG. 4 is a cross-sectional view of an outlet cone provided in an embodiment of the present invention;
FIG. 5 is a schematic diagram of a flow path of exhaust gas in a water removal device according to an embodiment of the present invention;
FIG. 6 is a schematic view of condensate water draining into a sleeve below an outlet cone in a water removal device according to an embodiment of the present invention;
FIG. 7 is a schematic view of condensate draining into a sleeve above an outlet cone in a water removal device according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of an outlet reflow assembly according to an embodiment of the present invention;
wherein, in fig. 1-8:
an inlet cone 101; a through hole 111; a sleeve 102; an inlet flange 121; a first receiving groove 1211; a water blocking protrusion 122; an outlet flange 123; a second receiving groove 1231; a flow cone 103; a diversion cone 131; an outlet cone 104; a second flange 105; a drain valve 106; a first flange 107; a guide barrel 108; and a take-out tube 109.
Detailed Description
The embodiment of the invention discloses a water removing device of an EGR system, wherein an inlet cone guides waste gas to be sprayed to the inner wall of a sleeve when the external temperature is low, an engine is stopped or the engine is in idle working condition, so that condensed water in the waste gas is attached to the inner wall of the sleeve and separated from the waste gas; meanwhile, the outlet backflow component is provided with the serpentine channel to discharge waste gas, condensed water in the waste gas is attached to and separated from the waste gas when impacting the wall surface of the serpentine channel, condensed water in the waste gas is effectively removed, the condition that condensed water in an EGR system is backflow to a low-position device in a pipeline is avoided, the low-position device is protected from oxidation and corrosion of the condensed water, and the reliability of the whole engine is improved. The embodiment of the invention also discloses an EGR system applying the water removal device, which can protect low-level devices in the system from oxidation and corrosion of condensed water and improve the reliability of the whole engine.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to FIGS. 1-8, an embodiment of the present invention provides a water removal device for an EGR system, comprising a sleeve 102, an inlet cone 101, and an outlet return assembly; inlet cone 101 is inserted into and plugs the inlet end of sleeve 102; the inlet cone 101 is provided with a conical air inlet cavity with a cross-sectional area gradually decreasing along a preset direction; the conical air inlet cavity is only opened at one end with a large cross-sectional area; the preset direction is the direction from the inlet end to the outlet end of the sleeve 102; the side wall of the inlet cone 101 is provided with a through hole 111 for guiding the exhaust gas in the conical air inlet cavity to spray towards the inner wall of the sleeve 102; the outlet return assembly is disposed at the outlet end of the sleeve 102 and forms a serpentine path for exhausting exhaust gases from within the sleeve 102.
When the water removing device of the EGR system is applied, if the external temperature is low, the engine is stopped or the engine is idling, the waste gas of the EGR system is firstly led into the conical air inlet cavity of the inlet cone 101, the conical air inlet cavity is in a tapered structure, so that the waste gas is accelerated and collides to the inner wall of the sleeve 102 through the through holes 111, condensed water in the waste gas is adhered to the inner wall of the sleeve 102 and forms condensed water, the waste gas reaches the outlet backflow assembly along the sleeve 102 and enters the serpentine channel, and the condensed water is adhered to and separated from the waste gas when the waste gas impacts the wall surface of the serpentine channel for a plurality of times in the serpentine channel.
Therefore, the exhaust gas entering the water removing device separates out condensed water at the inlet end and the outlet end of the sleeve 102, so that a good water removing effect can be obtained, the condition that condensed water is attached in a pipeline of the EGR system is avoided, the condition that the condensed water flows back to a low-position device is avoided, the low-position device is protected from oxidation and corrosion of the condensed water, and the reliability of the whole engine is improved.
Meanwhile, in the water removal device, the inlet cone 101 can accelerate waste gas, so that the flow speed of the waste gas in the serpentine channel is improved, the effect that the waste gas impacts the inner wall of the serpentine channel to enable condensed water to adhere to and separate from the waste gas is further improved, the water removal function of the serpentine channel is fully exerted, and the water removal effect of the whole water removal device is improved.
In addition, the water removing device of the EGR system provided by the embodiment of the invention can effectively remove the condensed water in the exhaust gas, and can avoid the condensed water from adhering to the pipeline of the EGR system even when the engine runs in a cold region, so that the situation of blockage caused by the fact that the condensed water flows back to a low-level device for icing is prevented, and smooth air intake of the engine is ensured.
As shown in fig. 1, the outlet return assembly may be configured to include:
the guide cone 103, the guide cone 103 is disposed in the sleeve 102, and is provided with a guide cone cavity 131 with a gradually increasing cross-sectional area along a preset direction, and the guide cone cavity 131 is opened only at one end with a large cross-sectional area.
An outlet cone 104, the outlet cone 104 being inserted and plugged at the outlet end of the sleeve 102; the outlet cone 104 is provided with a conical air outlet cavity with the cross-sectional area gradually increasing along a preset direction; the end of the conical air outlet cavity with large cross section area and the end with small cross section area are both open.
The outer wall of the cone 103 is used for guiding the exhaust gas in the sleeve 102 to reach the outer wall of the cone 104, and the outer wall of the cone 104 can guide the exhaust gas to enter the cone cavity 131 and then be discharged from the cone outlet cavity.
In the water removal device provided by the embodiment, the sleeve 102, the inlet cone 101, the guide cone 103 and the outlet cone 104 are provided with gaps, so that the heat conduction and insulation effects can be realized, the waste gas passing through the water removal device is not condensed with new liquid components, the trace moisture in the waste gas flowing to the downstream after the water removal device is dehydrated is ensured to keep in a gaseous state, and the problem of pipeline icing is avoided to a great extent.
The guide cone 103 and the outlet cone 104 are sequentially arranged in the sleeve 102 along a preset direction, wherein the outlet cone 104 and the guide cone 103 can be arranged to be separated from each other along the preset direction; of course, the outlet cone 104 may be further configured to be inserted into the guide cone cavity 131 of the guide cone 103 (the insertion degree is preferably set to be shallower), which is not limited in this embodiment. In this embodiment, the guide cone 103 and the outlet cone 104 are separated from each other, or the insertion depth of the guide cone and the outlet cone is shallow, so that the outer wall surface of the outlet cone 104 can be fully utilized to collide with the exhaust gas, which is beneficial to improving the water removal effect.
Preferably, in the above water removal device, the guide cone 103 and the inlet cone 101 are in an integral structure, and the connection between the guide cone 103 and the inlet cone 101 is in smooth transition, so that the waste gas entering the sleeve 102 from the through hole 111 can smoothly flow along the connection between the guide cone 103 and the inlet cone 101 and the outer wall of the guide cone 103, and the waste gas can be ensured to have a higher flow velocity, and meanwhile, the waste gas can also contact and strike the connection and the outer wall of the guide cone 103 in the flowing process, so that condensed water in the waste gas is attached to and separated from the waste gas, and the water removal effect is achieved. Furthermore, the guide cone 103 is integrally connected with the inlet cone 101, and a mounting bracket is not required to be additionally arranged to assemble the guide cone 103, so that the negative condition that the flow speed of the waste gas is influenced by the mounting bracket is avoided.
Further, in the water removing device, the end of the guide cone 103 with a larger cross-sectional area has a gap with the inner wall of the sleeve 102, so that the exhaust gas can be guided to uniformly impinge on the outer wall of the downstream outlet cone 104 to separate condensed water; the exhaust gas flows through the outer wall of the outlet cone 104 and then impinges on the inner wall of the guide cone 131 to separate condensed water.
After the exhaust gas is impacted for many times as described above, condensed water is attached to the impact wall surfaces of all parts and separated from the exhaust gas, so that the gas discharged from the conical gas outlet cavity contains little or no condensed water, the condition that the condensed water is attached in a downstream pipeline of the EGR system is avoided, and the condition of icing and blocking is avoided.
The end of the inlet cone 101 is provided with a first flange 107, and the first flange 107 and an inlet flange 121 at the inlet end in the sleeve 102 are arranged in a laminated manner and fixed with each other; a gap seal between the first flange 107 and the inlet flange 121; the end of the outlet cone 104 is provided with a second flange 105, and the second flange 105 and an outlet flange 123 at the outlet end in the sleeve 102 are arranged in a laminated manner and fixed with each other; the gap between the second flange 105 and the outlet flange 123 is sealed.
Specifically, through holes are arranged at the positions corresponding to the first flange 107 and the inlet flange 121 and are used for installing fixing pieces, so that the mutual fixed connection is realized, and the fixing pieces are connected with a pipeline of an EGR system; the second flange 105 and the outlet flange 123 are also provided with through holes at corresponding positions for mounting fasteners, which are fixedly connected with each other and with the pipelines of the EGR system.
A first sealing ring is arranged between the first flange 107 and the inlet flange 121, and a first accommodating groove 1211 for accommodating the first sealing ring is arranged on the first flange 107 and/or the inlet flange 121; a second sealing ring is arranged between the second flange 105 and the outlet flange 123, and the second flange 105 and/or the outlet flange 123 are provided with a second accommodating groove 1231 for accommodating the second sealing ring.
Referring to fig. 8, the outlet return assembly may be further configured to include: the guide barrel 108 and the leading-out barrel 109, wherein the guide barrel 108 comprises an annular side wall and a bottom plate sealed at one end of the annular side wall, and the other end of the annular side wall is opened; the two ends of the extraction cylinder 109 are opened, one end of the extraction cylinder is inserted into the opening of the guide cylinder 108, and the other end of the extraction cylinder is communicated with the outlet end of the sleeve 102; the guide barrel 108 is mounted within the sleeve 102 by brackets. The type of the outlet reflow assembly is not limited in this embodiment.
The number of through holes 111 in the side wall of the inlet cone 101 is plural, and the aperture of each through hole 111 gradually decreases along the preset direction. The smaller the area of the through holes 111 in the inlet cone 101 closer to the tip, the more through holes 111 are conveniently arranged on the wall surface of the tip in the inlet cone 101, so that the maximum flow area is increased.
For convenience of processing and ensuring uniform injection of exhaust gas into the sleeve 102, the through holes 111 of the inlet cone 101 may be arranged in a circumferential direction, and a plurality of circles of through holes 111 are provided in the inlet cone 101 in a preset direction, or the through holes 111 are arranged in a row in a direction of a generatrix of the inlet cone 101, and a plurality of rows of through holes are provided in the inlet cone 101 in a circumferential direction.
Of course, the through holes 111 may be disposed irregularly on the wall surface of the inlet cone 101, which is not limited in this embodiment.
To facilitate drainage of the condensate, the sidewall of the sleeve 102 is provided with a drain port where a drain valve 106 is mounted. In application, the water removing device is arranged along the horizontal direction in the preset direction or forms an acute angle with the horizontal direction, and the liquid draining port is correspondingly arranged on the bottom side wall of the sleeve 102.
Further, in order to collect the condensed water to the liquid outlet, at least one side wall (i.e. the bottom side wall) of the sleeve 102, which is provided with the liquid outlet, is inclined, the height of the side wall is gradually reduced along the preset direction, and a water retaining protrusion 122 is arranged at the inner side of the lowest position of the side wall; the drain is adjacent to the water retaining protrusion 122. The drain port may be provided as a threaded hole, and the drain valve 106 is screwed to the drain port.
For the convenience of manufacturing, the sleeve 102 is provided as a tapered cylinder with both ends open, and its cross-sectional area is gradually increased in a preset direction; the water blocking protrusion 122 is provided in a ring shape and is integrally formed with the sleeve 102.
The liquid discharge valve 106 is controlled by an electronic control unit, and a liquid level sensor in signal connection with the electronic control unit is arranged in the sleeve 102; when the liquid level in the sleeve 102 reaches a limit water level (namely a preset highest water level), the electronic control unit controls the liquid discharge valve 106 to be opened; when the liquid level in the sleeve 102 reaches a prescribed level (i.e., a preset minimum level), the electronic control unit controls the drain valve 106 to close. The specific control procedure of opening and closing the drain valve 106 is as follows:
(1) The electronic control unit receives the detection signal of the liquid level sensor and judges whether the liquid level reaches the limiting water level, if so, the step (2) is carried out, and if not, the step (4) is carried out.
(2) The electronic control unit controls the drain valve 106 to open.
(3) The electronic control unit receives the detection signal of the liquid level sensor, judges whether the liquid level reaches a specified water level, if so, goes to the step (4), and if not, returns to the step (2).
(4) The electronic control unit controls the drain valve 106 to close.
The following specifically describes the water removal process of the water removal device provided in this embodiment with reference to fig. 5 to 7:
the exhaust gas enters the water removal device and flows from the inlet end to the outlet end of the sleeve 102, and when passing through the inlet cone 101, the inlet cone 101 compresses the exhaust gas, so that the movement speed of the exhaust gas is improved. The exhaust gas after the speed is increased collides with the inner wall surface of the sleeve 102 through the through holes 111, and then condensed water in the exhaust gas is attached to the inner wall surface of the sleeve 102 and is condensed along the inner wall surface of the sleeve 102 to the bottom of the outlet end of the sleeve 102 under the action of self gravity and the flow of the exhaust gas; the inner wall surface of the sleeve 102 is conical, and the inner wall of the outlet end of the sleeve is provided with a water retaining protrusion 122, so that condensed water gradually gathers at the liquid outlet; the exhaust gas hits the inner wall surface of the sleeve 102, then contacts and hits the outer wall of the guide cone 103, then reaches the outer wall of the outlet cone 104, and then passes through the gap between the outlet cone 104 and the inner wall of the guide cone cavity 131, and flows from the conical outlet cavity to the downstream pipeline.
The flow pattern of the condensed water attached at the outer wall of the outlet cone 104 is as follows: as shown in fig. 6, because the liquid is easier to adhere to the wall surface, when the condensed water is located below the outlet cone 104, the condensed water flows back to the lowest position along the outer wall surface of the outlet cone 104 under the action of gravity and then falls to the liquid drain port; as shown in fig. 7, when the condensed water is located above the outlet cone 104, it falls into the diversion cone cavity 131 due to inertia, falls into the inner wall of the sleeve 102 and is collected at the drain.
Condensate on the outer wall and the inner wall of the diversion cone 131 also respectively drops on the bottom of the sleeve 102 and is collected at the liquid drain.
In this way, the condensed water separated from the exhaust gas can be discharged through the liquid discharge valve 106, so that the exhaust gas flowing downstream is ensured to contain little condensed water, and basically kept in a gas state under the heat preservation effect of the sleeve 102, and the problem of pipeline icing is avoided to a great extent.
The water removal device provided by the embodiment can remove water on the premise of not changing the original engine pipeline arrangement form, and is simple in arrangement, convenient to detach and high in reliability.
The embodiment of the invention also provides an EGR system, which comprises a water removing device, wherein the water removing device is provided by the embodiment.
The water removal device can be arranged as one, and the water removal device can be particularly arranged on a pipeline between two devices arranged up and down in the EGR system and positioned at the upstream of the pipeline to prevent condensed water from adhering in the pipeline. The water removal device may also be disposed at a location in the EGR system where the exhaust gas contains a large amount of condensed water, and the present embodiment is not limited.
Of course, the number of the water removal devices can be set to be multiple according to the needs, and the number of the water removal devices is not limited in this embodiment.
The EGR system provided by the embodiment is applied to the water removal device provided by the embodiment, so that devices at low positions in the EGR system can be protected from being oxidized and corroded by condensed water, and the reliability of the whole engine is improved. Of course, the EGR system provided in this embodiment also has other effects related to the water removal device provided in the foregoing embodiment, which are not described herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer 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 (9)
1. A water removal device for an EGR system, comprising:
a sleeve;
an inlet cone, which is inserted into and seals the inlet end of the sleeve; the inlet cone is provided with a conical air inlet cavity with the cross section area gradually decreasing along a preset direction; the conical air inlet cavity is only opened at one end with a large cross-sectional area; the preset direction is from the inlet end to the outlet end of the sleeve; the side wall of the inlet cone is provided with a through hole for guiding the exhaust gas in the conical air inlet cavity to spray to the inner wall of the sleeve;
the outlet backflow assembly is arranged at the outlet end of the sleeve and forms a serpentine channel, and the serpentine channel is used for discharging waste gas in the sleeve;
the outlet return assembly includes:
the guide cone is arranged in the sleeve and is provided with a guide cone cavity with a cross-sectional area gradually increasing along a preset direction, and only one end with a large cross-sectional area of the guide cone cavity is opened;
an outlet cone inserted and blocked at the outlet end of the sleeve; the outlet cone is provided with a conical air outlet cavity with the cross-sectional area gradually increasing along a preset direction; the end of the conical air outlet cavity with a large cross section area and the end with a small cross section area are both opened;
the outer wall of the guide cone is used for guiding the waste gas in the sleeve to reach the outer wall of the outlet cone, and the outer wall of the outlet cone can guide the waste gas to enter the guide cone cavity and then be discharged by the cone-shaped air outlet cavity.
2. The water removal device of claim 1, wherein the inducer cone and the inlet cone are of unitary construction and the junction therebetween transitions smoothly.
3. The water removal device of claim 1, wherein the end of the inlet cone is provided with a first flange, the first flange being arranged in a stack with and secured to the inlet flange at the inlet end of the sleeve; a gap seal between the first flange and the inlet flange;
the end part of the outlet cone is provided with a second flange, and the second flange and the outlet flange at the outlet end in the sleeve are arranged in a lamination manner and are mutually fixed; and a gap seal between the second flange and the outlet flange.
4. The water removal device of claim 1, wherein a plurality of through holes are formed in the side wall of the inlet cone, and the aperture of each through hole is gradually reduced along the preset direction.
5. The water removal device of claim 4, wherein the through holes are circumferentially arranged in a circle and a plurality of circles of the through holes are provided along the preset direction; or alternatively
The through holes are arranged in rows along the direction of the generatrix of the inlet cone, and a plurality of rows are arranged along the circumferential direction.
6. The water removal device of claim 1, wherein a drain port is formed in the side wall of the sleeve, and a drain valve is mounted at the drain port;
the side wall of one side of the sleeve, which is provided with the liquid outlet, is inclined, the height of the side wall is gradually reduced along the preset direction, and a water retaining protrusion is arranged at the inner side of the lowest part; the liquid outlet is close to the water retaining protrusion.
7. The water removal device of claim 6, wherein the sleeve is a conical cylinder and has a cross-sectional area that increases progressively in the predetermined direction; the water retaining protrusion is annular and is of an integrated structure with the sleeve.
8. The water removal device as claimed in claim 6, wherein the drain valve is controlled by an electronic control unit, a liquid level sensor is arranged in the sleeve and is in signal connection with the electronic control unit,
when the liquid level in the sleeve reaches a limit water level, the electronic control unit controls the liquid discharge valve to be opened; when the liquid level in the sleeve reaches a specified water level, the electronic control unit controls the liquid discharge valve to be closed.
9. An EGR system comprising a water scavenging means as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310526665.5A CN116241390B (en) | 2023-05-11 | 2023-05-11 | EGR system and water removal device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310526665.5A CN116241390B (en) | 2023-05-11 | 2023-05-11 | EGR system and water removal device thereof |
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| Publication Number | Publication Date |
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| CN116241390A CN116241390A (en) | 2023-06-09 |
| CN116241390B true CN116241390B (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310526665.5A Active CN116241390B (en) | 2023-05-11 | 2023-05-11 | EGR system and water removal device thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB388627A (en) * | 1931-06-12 | 1933-03-02 | Eugen Haber | Arrangement for removing of solid or liquid particles from gases or vapours |
| GB789275A (en) * | 1955-05-10 | 1958-01-15 | Garrett Corp | Improvements in or relating to water separator |
| CN206881951U (en) * | 2017-06-20 | 2018-01-16 | 大连理工大学 | It is a kind of to be flowed back supersonic cyclone separator from ejection circulation |
| CN216062618U (en) * | 2021-08-31 | 2022-03-18 | 孔丽超 | Automatic drainage moisture separator of accurate control |
| CN216278207U (en) * | 2021-11-22 | 2022-04-12 | 上汽通用汽车有限公司 | Water removal device of EGR (exhaust gas Recirculation) system for vehicle and vehicle comprising water removal device |
| CN217401032U (en) * | 2022-06-01 | 2022-09-09 | 中国第一汽车股份有限公司 | EGR water trap and have its engine |
-
2023
- 2023-05-11 CN CN202310526665.5A patent/CN116241390B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB388627A (en) * | 1931-06-12 | 1933-03-02 | Eugen Haber | Arrangement for removing of solid or liquid particles from gases or vapours |
| GB789275A (en) * | 1955-05-10 | 1958-01-15 | Garrett Corp | Improvements in or relating to water separator |
| CN206881951U (en) * | 2017-06-20 | 2018-01-16 | 大连理工大学 | It is a kind of to be flowed back supersonic cyclone separator from ejection circulation |
| CN216062618U (en) * | 2021-08-31 | 2022-03-18 | 孔丽超 | Automatic drainage moisture separator of accurate control |
| CN216278207U (en) * | 2021-11-22 | 2022-04-12 | 上汽通用汽车有限公司 | Water removal device of EGR (exhaust gas Recirculation) system for vehicle and vehicle comprising water removal device |
| CN217401032U (en) * | 2022-06-01 | 2022-09-09 | 中国第一汽车股份有限公司 | EGR water trap and have its engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116241390A (en) | 2023-06-09 |
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