CN111120155A - EGR cooling device and engine - Google Patents
EGR cooling device and engine Download PDFInfo
- Publication number
- CN111120155A CN111120155A CN201911223226.7A CN201911223226A CN111120155A CN 111120155 A CN111120155 A CN 111120155A CN 201911223226 A CN201911223226 A CN 201911223226A CN 111120155 A CN111120155 A CN 111120155A
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- Prior art keywords
- cooling
- egr
- exhaust gas
- valve
- egr valve
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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
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
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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
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention relates to the technical field of engines, and discloses an EGR (exhaust gas recirculation) cooling device and an engine. The EGR cooling device comprises an exhaust gas inlet, a cooling cavity, an exhaust gas outlet and an EGR valve, wherein the EGR valve divides the cooling cavity into a cooling hot end and a cooling cold end, the volume of the cooling hot end is the same as that of the cooling cold end, exhaust gas enters the EGR cooling device from the exhaust gas inlet, sequentially passes through the cooling hot end, the EGR valve and the cooling cold end to be cooled, and is discharged out of the EGR cooling device through the exhaust gas outlet. The invention also discloses an engine adopting the EGR cooling device. According to the EGR cooling device, the cooling cavity is divided into the cooling hot end and the cooling cold end through the EGR valve, so that the waste gas can enter the cooling cavity for cooling twice, the volume of the cooling hot end is the same as that of the cooling cold end, the cooling effect is better, the cost of the EGR valve is lower, carbon deposition and coking of the EGR valve can be avoided, the risk of condensation acid liquid accumulation is effectively reduced, the corrosion risk is reduced, the influence of pulse on the EGR cooling device is reduced, and the service life of the EGR cooling device is prolonged.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an EGR cooling device and an engine.
Background
An EGR (Exhaust Gas Recirculation) system is a technology for introducing part of Exhaust Gas after engine combustion into intake air again to participate in combustion, and is mainly used for reducing NOXThe emission of the fuel, the improvement of the fuel economy and the like, and is widely applied to the field of automobile engines.
The EGR system mainly comprises an EGR cooler, an EGR valve, EGR inlet and outlet pipe fittings and the like. The existing EGR cooler mainly comprises a cavity and a heat dissipation core body, a single water path and a gas path are formed, and the waste gas flowing through the gas path is cooled by cooling liquid in the water path.
The existing EGR valve mainly comprises two arrangement modes:
(1) the EGR valve is arranged before the EGR cooler air inlet: and the high-temperature gas enters the EGR cooler for cooling after passing through the EGR valve. The insufficiency of the arrangement mode is as follows: the gas passing through the EGR valve is high temperature gas, and the actuator and valve parts need to be cooled, which results in high cost of the EGR valve.
(2) The EGR valve is arranged after the air outlet of the EGR cooler: the high-temperature gas now enters the EGR cooler, and the cooled low-temperature gas passes through the EGR valve. The insufficiency of the arrangement mode is as follows: carbon deposition and coking of the EGR valve affect the opening and response of the valve; the EGR cooler is always communicated with the exhaust pipe, so that condensed acid is easy to accumulate to cause corrosion failure; the exhaust gas pulsation may cause a resonance chamber to be formed in the EGR cooler when the EGR valve is closed, resulting in failure of acoustic resonance.
Disclosure of Invention
Based on the above, the present invention provides an EGR cooling device and an engine, where the EGR cooling device reduces the occurrence of carbon deposition and coking of an EGR valve and the accumulation of condensed acid liquid during the use process, and also reduces the cost of the EGR valve and prolongs the service life of the EGR valve.
In order to achieve the purpose, the invention adopts the following technical scheme:
the EGR cooling device comprises an exhaust gas inlet, a cooling cavity and an exhaust gas outlet which are communicated in sequence, and further comprises an EGR valve, wherein the EGR valve divides the cooling cavity into a cooling hot end and a cooling cold end, the volume of the cooling hot end is the same as that of the cooling cold end, exhaust gas enters the EGR cooling device from the exhaust gas inlet, sequentially passes through the cooling hot end, the EGR valve and the cooling cold end and is discharged from the exhaust gas outlet.
As a preferable mode of the EGR cooling device, the EGR valve is disposed on one side of the cooling chamber, and the exhaust gas inlet and the exhaust gas outlet are provided at the other end of the EGR valve.
As a preferable scheme of the EGR cooling device, the EGR valve is provided with a valve inlet and a valve outlet, the valve inlet is communicated with the cooled hot end, and the valve outlet is communicated with the cooled cold end.
As a preferred scheme of the EGR cooler, the cooling hot end is provided with a hot end outlet, and the hot end outlet is communicated with the valve inlet; the cooling cold end is provided with the cold end import, the cold end import with valve outlet intercommunication.
As a preferred scheme of the EGR cooling device, mounting flanges are arranged on the hot end outlet and the cold end inlet, and the EGR valve is detachably connected with the mounting flanges.
Preferably, the EGR valve is bolted to the mounting flange.
As a preferable mode of the EGR cooling device, the exhaust gas inlet is disposed below the exhaust gas outlet.
As a preferred scheme of the EGR cooling device, the cooling cavity includes a heat dissipation core and a housing located at the periphery of the heat dissipation core, the cooling hot end and the cooling cold end are located in the heat dissipation core, and a water cooling pipeline is further arranged between the heat dissipation core and the housing.
As a preferred scheme of EGR cooling device, the water-cooling pipeline is provided with a cooling water inlet and a cooling water outlet, the cooling water inlet is located below the cooling cavity, and the cooling water outlet is located above the cooling cavity.
An engine comprising an EGR cooling apparatus according to any preceding claim.
The invention has the beneficial effects that: the EGR valve divides the cooling cavity into a cooling hot end and a cooling cold end, so that the waste gas can enter the cooling cavity twice for cooling, and the cooling effect is better; meanwhile, the EGR valve divides the cooling cavity into a cooling hot end and a cooling cold end, and the volume of the cooling hot end is the same as that of the cooling cold end, so that the temperature of the exhaust gas entering the EGR valve is not too high or too low, the cost of the EGR valve is reduced, and carbon deposition and coking of the EGR valve are avoided; in addition, the EGR valve divides the cooling cavity into the cooling hot end and the cooling cold end, so that the risk of accumulation of condensed acid can be effectively reduced, the corrosion risk is reduced, the influence of pulse on the EGR cooling device is reduced, and the service life of the EGR cooling device is prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and 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 the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic view of an EGR cooler according to an embodiment of the present invention.
In the figure:
1-a waste gas inlet; 2-a cooling chamber; 3-an exhaust gas outlet; 4-an EGR valve; 5-hot end outlet; 6-cold end inlet; 7-cooling water inlet; 8-cooling water outlet.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present embodiment provides an EGR cooling device for an engine, the device includes an exhaust gas inlet 1, a cooling chamber 2, an exhaust gas outlet 3 and an EGR valve 4, wherein the EGR valve 4 divides the cooling chamber 2 into a hot cooling end and a cold cooling end, the volume of the hot cooling end is the same as that of the cold cooling end, exhaust gas enters the EGR cooling device from the exhaust gas inlet 1, is cooled through the hot cooling end, the EGR valve 4 and the cold cooling end in sequence, and is discharged out of the EGR cooling device through the exhaust gas outlet 3.
The cooling cavity 2 is divided into a cooling hot end and a cooling cold end through the EGR valve 4, so that the waste gas can enter the cooling cavity 2 for cooling twice, and the cooling effect is better; meanwhile, the EGR valve 4 divides the cooling cavity 2 into a cooling hot end and a cooling cold end, and the volume of the cooling hot end is the same as that of the cooling cold end, so that the temperature of the exhaust gas entering the EGR valve 4 is not too high or too low, the cost of the EGR valve 4 is reduced, and carbon deposition and coking of the EGR valve 4 are avoided; in addition, the EGR valve 4 divides the cooling cavity 2 into a cooling hot end and a cooling cold end, so that the risk of condensation acid liquid accumulation can be effectively reduced, the corrosion risk is reduced, the influence of pulse on the EGR cooling device is reduced, and the service life of the EGR cooling device is prolonged.
Specifically, the EGR valve 4 is disposed on one side of the cooling chamber 2, and the exhaust gas inlet 1 and the exhaust gas outlet 3 are disposed on the other end of the EGR valve 4; the EGR valve 4 is provided with a valve inlet and a valve outlet, the valve inlet is communicated with the cooling hot end, and the valve outlet is communicated with the cooling cold end; the cooling hot end is provided with a hot end outlet 5, and the hot end outlet 5 is communicated with the valve inlet; a cold end inlet 6 is arranged at the cooling cold end, and the cold end inlet 6 is communicated with the valve outlet; the exhaust gas inlet 1 is disposed below the exhaust gas outlet 3.
High-temperature exhaust gas firstly enters a cooling hot end from an exhaust gas inlet 1 below one end of the EGR cooling device to be primarily cooled, and the primarily cooled exhaust gas has certain temperature although the temperature is reduced; then, the exhaust gas flows to a hot end outlet 5 at the other end of the EGR cooling device and enters an EGR valve 4 through a valve inlet; the exhaust gas then flows through the EGR valve 4 and out of the EGR valve 4 through the valve outlet, and then enters the cooling cold end through the cold end inlet 6 to be further cooled, and the temperature of the further cooled exhaust gas can be cooled down to a suitable temperature; finally, the exhaust gas flows to one end of the EGR cooling device and flows out through an exhaust gas outlet 3 above the exhaust gas inlet 1, and cooling is completed.
Preferably, hot junction export 5 and cold junction import 6 all are provided with mounting flange, and EGR valve 4 can be dismantled with mounting flange and be connected, are convenient for carry out dismouting and maintenance to EGR valve 4. In this embodiment, the EGR valve 4 is bolted to the mounting flange.
Further, cooling chamber 2 includes the radiating core and is located the casing of radiating core periphery, and cooling hot junction and cooling cold junction are located the radiating core, still are provided with the water-cooling pipeline between radiating core and the casing. And cooling water is arranged in the water cooling pipeline and is used for cooling the waste gas in the cooling cavity 2.
Specifically, the water cooling pipeline is provided with a cooling water inlet 7 and a cooling water outlet 8, cooling water enters the water cooling pipeline from the cooling water inlet 7 and flows out of the water cooling pipeline from the cooling water outlet 8; in this embodiment, the cooling water inlet 7 is located below the cooling cavity 2, and the cooling water outlet 8 is located above the cooling cavity 2, so that the cooling water can fill the whole water cooling pipeline to sufficiently cool the waste gas in the cooling cavity 2.
In other embodiments, the heat dissipation core in the cooling cavity 2 may be a finned, spiral-finned, U-shaped finned or other type of cooling core; the waste gas inlet 1 and the waste gas outlet 3 can be arranged up and down or left and right; the shape of the exhaust gas inlet 1 and the exhaust gas outlet 3 may be circular or other shapes; the connection mode of the flange of the EGR cooling device and the EGR valve 4 can also be quick insertion, clamping, interference connection and the like; the shape of the cooling chamber 2 may also be square or other shapes, which are not limited in particular, and can be set by those skilled in the art according to the actual situation.
The embodiment also discloses an engine, which comprises the EGR cooling device in any scheme, and has the advantages of low cost, long service life and the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being 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. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Claims (10)
1. The utility model provides a EGR cooling device, is including exhaust gas inlet (1), cooling chamber (2) and exhaust gas outlet (3) that communicate in proper order, its characterized in that still includes EGR valve (4), EGR valve (4) will cooling chamber (2) are cut apart into cooling hot junction and cooling cold junction, the volume of cooling hot junction with the volume of cooling cold junction is the same, waste gas by exhaust gas inlet (1) gets into EGR cooling device, passes through in proper order the cooling hot junction EGR valve (4) with the cooling cold junction is cooled off, and passes through exhaust gas outlet (3) are discharged EGR cooling device.
2. An EGR cooler device according to claim 1, characterized in that the EGR valve (4) is placed on one side of the cooling chamber (2), and the exhaust gas inlet (1) and the exhaust gas outlet (3) are provided at the other end of the EGR valve (4).
3. An EGR cooler device according to claim 2, characterised in that the EGR valve (4) is provided with a valve inlet communicating with the cooled warm end and a valve outlet communicating with the cooled cold end.
4. An EGR cooler device according to claim 3, characterised in that the cooled warm end is provided with a warm end outlet (5), said warm end outlet (5) communicating with the valve inlet; the cooling cold end is provided with cold end import (6), cold end import (6) with the valve export intercommunication.
5. An EGR cooler device according to claim 4, characterized in that the hot end outlet (5) and the cold end inlet (6) are provided with mounting flanges, and the EGR valve (4) is detachably connected with the mounting flanges.
6. An EGR cooler arrangement according to claim 5, characterized in that the EGR valve (4) is bolted to the mounting flange.
7. An EGR cooler device according to claim 2, characterized in that the exhaust gas inlet (1) is placed below the exhaust gas outlet (3).
8. The EGR cooling device according to claim 1, wherein the cooling chamber (2) comprises a heat dissipation core and a housing located at the periphery of the heat dissipation core, the hot cooling end and the cold cooling end are located in the heat dissipation core, and a water cooling pipeline is further arranged between the heat dissipation core and the housing.
9. An EGR cooler device according to claim 8, characterized in that the water cooling line is provided with a cooling water inlet (7) and a cooling water outlet (8), the cooling water inlet (7) being located below the cooling chamber (2) and the cooling water outlet (8) being located above the cooling chamber (2).
10. An engine characterized by comprising an EGR cooling device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911223226.7A CN111120155A (en) | 2019-12-03 | 2019-12-03 | EGR cooling device and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911223226.7A CN111120155A (en) | 2019-12-03 | 2019-12-03 | EGR cooling device and engine |
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| Publication Number | Publication Date |
|---|---|
| CN111120155A true CN111120155A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911223226.7A Pending CN111120155A (en) | 2019-12-03 | 2019-12-03 | EGR cooling device and engine |
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| Country | Link |
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| CN (1) | CN111120155A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120017575A1 (en) * | 2010-07-22 | 2012-01-26 | Wescast Industries, Inc. | Exhaust Heat Recovery System with Bypass |
| CN203394652U (en) * | 2013-07-12 | 2014-01-15 | 昆明云内动力股份有限公司 | EGR (exhaust gas recirculation) cooler for diesel engine |
| KR20160097613A (en) * | 2015-02-09 | 2016-08-18 | 현대자동차주식회사 | Integrated egr cooler |
| CN107489565A (en) * | 2016-12-23 | 2017-12-19 | 宝沃汽车（中国）有限公司 | A kind of gas recirculation system and the engine with the system |
| CN110486196A (en) * | 2019-07-29 | 2019-11-22 | 东风商用车有限公司 | A kind of double entrances integrate the controllable egr system of EGR valve |
-
2019
- 2019-12-03 CN CN201911223226.7A patent/CN111120155A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120017575A1 (en) * | 2010-07-22 | 2012-01-26 | Wescast Industries, Inc. | Exhaust Heat Recovery System with Bypass |
| CN203394652U (en) * | 2013-07-12 | 2014-01-15 | 昆明云内动力股份有限公司 | EGR (exhaust gas recirculation) cooler for diesel engine |
| KR20160097613A (en) * | 2015-02-09 | 2016-08-18 | 현대자동차주식회사 | Integrated egr cooler |
| CN107489565A (en) * | 2016-12-23 | 2017-12-19 | 宝沃汽车（中国）有限公司 | A kind of gas recirculation system and the engine with the system |
| CN110486196A (en) * | 2019-07-29 | 2019-11-22 | 东风商用车有限公司 | A kind of double entrances integrate the controllable egr system of EGR valve |
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Application publication date: 20200508 |
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