CN113464324A - Multichannel EGR cooler - Google Patents
Multichannel EGR cooler Download PDFInfo
- Publication number
- CN113464324A CN113464324A CN202110850782.8A CN202110850782A CN113464324A CN 113464324 A CN113464324 A CN 113464324A CN 202110850782 A CN202110850782 A CN 202110850782A CN 113464324 A CN113464324 A CN 113464324A
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- Prior art keywords
- pipe
- channel
- egr cooler
- cover
- cooler
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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
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
-
- 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
- F02M26/32—Liquid-cooled heat exchangers
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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 discloses a multi-channel EGR cooler, and belongs to the field of EGR system design. The cooling part of the EGR cooler consists of a threaded radiating pipe and a fin-type cooling pipe, the main radiating pipe is the fin-type cooling pipe, the auxiliary radiating pipe is the threaded radiating pipe, double-pipe cooling improves the cooling efficiency of waste gas, and compared with a single-pipe cooling structure, the cost is also reduced; secondly, compare with the EGR cooler among the correlation technique, simple structure volume is less, realizes the circulation to the large granule carbide in the waste gas through the screw thread cooling tube, solves easy jam problem.
Description
Technical Field
The invention relates to the field of EGR system design, in particular to a multi-channel EGR cooler.
Background
Exhaust Gas Recirculation (EGR) refers to the Recirculation of a portion of the Exhaust gases from the engine back into the intake manifold, which distributes the air and fuel mixture from the carburetor or throttle body to the cylinder intake ports, and re-enters the cylinders with the fresh mixture. Because the waste gas contains a large amount of CO2Equal polyatomic gas, and CO2When the gas can not be combusted, the gas absorbs a large amount of heat due to high specific heat capacity, so that the maximum combustion temperature of the gas mixture in the cylinder is reduced, and the nitrogen oxide NO is reducedxIs thereby achieved at the exhaust systemThe EGR technology is extremely environmentally friendly.
The exhaust gas recirculation system is structurally divided into an internal EGR system and an external EGR system, the external EGR system is connected to an exhaust system, exhaust gas is led out and then led into an air intake system, and the exhaust gas is fully mixed with fresh air before entering a cylinder. Compared with an internal EGR system, the structure of the internal EGR system is generally provided with components such as an EGR valve, an EGR cooler, a special pipeline and the like, and the external EGR can realize accurate control on a plurality of parameters of exhaust gas, so that the function of the EGR is realized to the maximum extent. The present application is directed generally to improvements in EGR coolers for external EGR systems. An EGR cooler is a device used to cool a portion of the exhaust gases returning to the engine cylinder in order to reduce NO in the exhaust gases of a motor vehiclexThe EGR cooler is created by the need to return a portion of the exhaust gas to the engine cylinder (i.e., EGR technology), which must be cooled before the exhaust gas enters the engine intake system due to exhaust gas temperatures as high as 600 ℃.
In the related art, the core structure of the EGR cooler is mostly a threaded radiating pipe array structure or a fin type frame structure. The threaded radiating pipe array type radiator is simple in structure and low in manufacturing cost, but has the problems of large occupied space, low cooling efficiency and poor stability; the structure cooling efficiency of the fin type frame structure is high, but the problems of complex structure, high manufacturing cost and easy blockage exist. Therefore, how to realize a product with high cooling efficiency, low cost, small volume, difficult blockage and strong stability is a problem to be solved urgently in the industry.
Disclosure of Invention
The invention provides a multi-channel EGR cooler, which can solve the problems of the structural design of an EGR cooler core in the related technology, and the technical scheme is as follows:
the present invention provides a multi-channel EGR cooler, comprising: the air valve assembly 100, the connecting rod assembly 200, the fan sheet 300, the exhaust end cover 400, the cooler core body 500, the straight-through corrugated pipe 600 and the air inlet end cover 700;
the air valve assembly 100 and the exhaust end cover 400 are arranged at the front end of the cooler core body 500, one end of the connecting rod assembly 200 is connected to the air valve assembly 100, and the other end of the connecting rod assembly 200 is connected to the front end of the cooler core body 500, wherein the connecting rod assembly 200 is used for connecting and transmitting the tension of the air valve assembly 100, the tension is used for realizing the action of the fan 300, the fan 300 is arranged inside the front end of the cooler core body 500, the fan 300 is used for controlling the opening and closing of the straight-through air port 510 under the action of the fan, and the straight-through air port 510 is arranged at the front end of the cooler core body 500; the straight-through corrugated pipe 600 is arranged beside the cooler core body 500, and the air inlet end cover 700 is arranged at the tail part of the cooler core body 500;
the cooler core body 500 is composed of a fixed end cover 510, a cylinder 520, a threaded radiating pipe 530, a finned cooling pipe 540, a water outlet pipe 550, a water inlet pipe 560 and a drainage plug 570, wherein the threaded radiating pipe 530 is arranged at the upper end and the lower end of the fixed end cover 510, the finned cooling pipe 540 is arranged in the middle of the fixed end cover 510, the threaded radiating pipe (530) is arranged at the periphery of the finned cooling pipe (540), the water outlet pipe 550 and the water inlet pipe 560 are used for water path connection, and the drainage plug 570 is used for drainage.
Optionally, the air valve assembly 100 includes a vacuum chamber lower cover 110, a spring 120, a vacuum access port 130, a leather cup 140, a vacuum chamber upper cover 150, a wear-resistant spacer 160, a leather cup gland 170 and a spring gland 180;
the vacuum cavity lower cover 110 and the vacuum cavity upper cover 150 are separated by the packing cup 140, the vacuum cavity lower cover 110 is connected with a vacuum gas source, and the vacuum cavity upper cover 150 is communicated with the external atmosphere;
under the condition that the vacuum inlet 130 is connected with the vacuum air source, the vacuum chamber lower cover 110 and the leather cup 140 form a vacuum chamber, the spring 120, the leather cup 140, the leather cup pressing cover 170 and the spring pressing cover 180 are in a downward movement state, and the connecting rod assembly 200 is under the pulling force.
Optionally, the exhaust end cover 400 is provided with a main channel and a through channel, the main channel is connected with the cooler core 500, and the through channel is connected with the through bellows 600;
the main passage and the through passage communicate between the exhaust end cover 400 and the intake end cover 700.
Optionally, the straight-through corrugated pipe 600 is made of a corrugated pipe, and the straight-through corrugated pipe 600 is a main pipeline of the straight-through passage.
Optionally, the through channel is controlled electrically and automatically.
Optionally, the cylinder 520 is provided with three openings, wherein two openings are used for water path connection, and the rest openings are used for discharging water.
Optionally, the threaded heat dissipation pipe 530 is a straight pipe with a spiral structure.
Optionally, the fin-type cooling tube 540 is of a U-shaped groove structure, and a fin is wrapped in the middle of the fin-type cooling tube 540.
The invention has the following beneficial effects:
the embodiment of the invention provides a multi-channel EGR cooler, firstly, a cooling part consists of a threaded radiating pipe and a finned cooling pipe, the main radiating pipe is the finned cooling pipe, the auxiliary radiating pipe is the threaded radiating pipe, double-pipe cooling improves the cooling efficiency of waste gas, and compared with a single-pipe cooling structure, the multi-channel EGR cooler has the advantages that the cost is reduced; secondly, compare with the EGR cooler among the correlation technique, simple structure volume is less, realizes the circulation to the large granule carbide in the waste gas through the screw thread cooling tube, solves easy jam problem.
Drawings
FIG. 1 is a schematic diagram of a multi-pass EGR cooler according to an exemplary embodiment of the present invention;
FIG. 2 shows a schematic structural view of the cooler core of FIG. 1;
fig. 3 shows a schematic view of the structure of the gas valve assembly of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Reference herein to "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Example 1
Referring to fig. 1 and 2, fig. 1 shows a schematic structural diagram of a multi-channel EGR cooler provided by an exemplary embodiment of the present invention, and fig. 2 shows a schematic structural diagram of a cooler core in fig. 1.
The multi-channel EGR cooler includes, among other things, a valve assembly 100, a linkage assembly 200, a fan 300, an exhaust end cap 400, a cooler core 500, a straight-through bellows 600, and an intake end cap 700.
The air valve assembly 100 and the exhaust end cover 400 are arranged at the front end of the cooler core body 500, one end of the connecting rod assembly 200 is connected to the air valve assembly 100, the other end of the connecting rod assembly 200 is connected to the front end of the cooler core body 500, wherein the connecting rod assembly 200 is used for connecting and transmitting the tension of the air valve assembly 100, the tension is used for realizing the action of the fan piece 300, the fan piece 300 is arranged inside the front end of the cooler core body 500, the fan piece 300 is used for controlling the opening and closing of the straight air opening 510 under the action of the fan piece 300, and the straight air opening 510 is arranged at the front end of the cooler core body 500; the straight-through bellows 600 is disposed beside the cooler core 500, and the inlet end cap 700 is disposed at the tail of the cooler core 500.
As shown in fig. 2, the cooler core body 500 is composed of a fixed end cap 510, a cylinder 520, a threaded radiating pipe 530, a fin type cooling pipe 540, an outlet pipe 550, an inlet pipe 560 and a drain plug 570, wherein the threaded radiating pipe 530 is disposed at upper and lower ends of the fixed end cap 510, the fin type cooling pipe 540 is disposed at the middle of the fixed end cap 510, the threaded radiating pipe 530 is disposed at the periphery of the fin type cooling pipe 540, the outlet pipe 550 and the inlet pipe 560 are used for water path connection, and the drain plug 570 is used for draining water.
To sum up, the embodiment of the present invention provides a multi-channel EGR cooler, first, a cooling part is composed of a threaded heat dissipation tube and a fin-type cooling tube, a main heat dissipation is the fin-type cooling tube, an auxiliary heat dissipation is the threaded heat dissipation tube, double-tube cooling improves the cooling efficiency of exhaust gas, and compared with a single-tube cooling structure, the cost is also reduced; secondly, compare with the EGR cooler among the correlation technique, simple structure volume is less, realizes the circulation to the large granule carbide in the waste gas through the screw thread cooling tube, solves easy jam problem.
Example 2
Referring to fig. 3, fig. 3 is a schematic structural view of the valve assembly of fig. 1.
Optionally, the valve assembly 100 includes a vacuum chamber lower cover 110, a spring 120, a vacuum inlet 130, a cup 140, a vacuum chamber upper cover 150, a wear spacer 160, a cup gland 170, and a spring gland 180.
The vacuum chamber lower cover 110 and the vacuum chamber upper cover 150 are separated by a leather cup 140, the vacuum chamber lower cover 110 is connected with a vacuum gas source, and the vacuum chamber upper cover 150 is communicated with the external atmosphere.
Under the condition that the vacuum inlet 130 is communicated with a vacuum air source, the vacuum chamber lower cover 110 and the leather cup 140 form a vacuum chamber, the spring 120, the leather cup 140, the leather cup gland 170 and the spring gland 180 are in a downward movement state, and the connecting rod assembly 200 is pulled.
Optionally, the exhaust end cover 400 is provided with a main channel and a through channel, the main channel is connected with the cooler core 500, and the through channel is connected with the through bellows 600.
The main and through passages communicate between the exhaust end cover 400 and the intake end cover 700.
Optionally, the straight-through bellows 600 is made of bellows, and the straight-through bellows 600 is a main pipeline of the straight-through passage.
Optionally, the through channel is electrically automated.
Optionally, the cylinder 520 is provided with three openings, wherein two openings are used for water path connection, and the rest openings are used for discharging water.
Alternatively, the threaded radiating pipe 530 is a straight pipe having a spiral structure.
Optionally, the finned cooling tube 540 is a U-shaped groove structure, and a finned plate is wrapped in the middle of the finned cooling tube 540.
In one possible embodiment, the cooler core 500 of the EGR cooler is formed by mixing an array of threaded heat dissipating tubes (threaded heat dissipating tubes 530) and fin-type heat dissipating tubes (fin-type cooling tubes 540), wherein the fin-type cooling tubes 540 are centered, the threaded heat dissipating tubes 530 are uniformly distributed on the upper and lower sides, the fin-type cooling tubes 540 are used for primary heat dissipation, and the threaded heat dissipating tubes 530 are used for secondary heat dissipation. When carbon deposition or gel blockage occurs on the cooler core body 500, exhaust back pressure rises, pressure rises to a set value, the vacuum cavity is opened, vacuum air pressure is generated inside the vacuum cavity, the spring 120 is under pressure under the action of the vacuum air pressure, the connecting rod assembly 200 overcomes the stress of the spring 120 to brake, so that the fan piece 300 is pushed to act, the straight air port 510 at the upper end of the EGR cooler is opened by the fan piece 300 under action, high-pressure air is decompressed, the vacuum cavity is closed after the pressure returns to a normal value, the fan piece 300 returns, the straight air port 510 is closed, and the spring 120 returns.
In the embodiment of the invention, the structure of the air valve assembly is further disclosed so as to further explain the structural principle that the connecting rod assembly is subjected to tension.
In the embodiment of the invention, the exhaust end cover is provided with the main channel and the through channel, and the through channel is automatically opened to perform pressure relief action when the pressure is ultrahigh under the automatic control, so that the safety of the EGR cooler is improved.
The invention is not to be considered as limited to the particular embodiments shown and described, but is to be understood that various modifications, equivalents, improvements and the like can be made without departing from the spirit and scope of the invention.
Claims (8)
1. A multi-channel EGR cooler, characterized in that it comprises: the air valve assembly (100), the connecting rod assembly (200), the fan sheet (300), the exhaust end cover (400), the cooler core body (500), the straight-through corrugated pipe (600) and the air inlet end cover (700);
the air valve assembly (100) and the exhaust end cover (400) are arranged at the front end of the cooler core body (500), one end of the connecting rod assembly (200) is connected to the air valve assembly (100), the other end of the connecting rod assembly (200) is connected to the front end of the cooler core body (500), wherein the connecting rod assembly (200) is used for connecting and transmitting the tension of the air valve assembly (100), the tension is used for realizing the action of the fan sheet (300), the fan sheet (300) is arranged in the front end of the cooler core body (500), the fan sheet (300) is used for controlling the opening and closing of the through air port (510) under the action of the fan sheet (300), and the through air port (510) is arranged at the front end of the cooler core body (500); the straight-through corrugated pipe (600) is arranged beside the cooler core body (500), and the air inlet end cover (700) is arranged at the tail part of the cooler core body (500);
the cooler core body (500) consists of a fixed end cover (510), a cylinder body (520), a threaded radiating pipe (530), a finned cooling pipe (540), an outlet pipe (550), an inlet pipe (560) and a drainage plug (570), wherein the finned cooling pipe (540) is arranged in the middle of the fixed end cover (510), the threaded radiating pipe (530) is arranged at the periphery of the finned cooling pipe (540), the outlet pipe (550) and the inlet pipe (560) are used for water path connection, and the drainage plug (570) is used for drainage.
2. The multi-channel EGR cooler of claim 1 wherein the valve assembly (100) includes a vacuum chamber lower cover (110), a spring (120), a vacuum inlet (130), a cup (140), a vacuum chamber upper cover (150), a wear cup (160), a cup gland (170), and a spring gland (180);
the vacuum cavity lower cover (110) and the vacuum cavity upper cover (150) are separated by the leather cup (140), the vacuum cavity lower cover (110) is connected with a vacuum gas source, and the vacuum cavity upper cover (150) is communicated with the external atmosphere;
under the condition that the vacuum access port (130) is communicated with the vacuum air source, the vacuum cavity lower cover (110) and the leather cup (140) form a vacuum cavity, the spring (120), the leather cup (140), the leather cup pressing cover (170) and the spring pressing cover (180) are in a lower motion state, and the connecting rod assembly (200) is subjected to the pulling force.
3. A multi-channel EGR cooler according to claim 1 characterised in that the exhaust end cover (400) is provided with a main channel connected with the cooler core (500) and a through channel connected with the through bellows (600);
the main channel and the through channel are communicated between the exhaust end cover (400) and the intake end cover (700).
4. A multi-channel EGR cooler according to claim 3 characterised in that the feed-through bellows (600) is made of bellows, the feed-through bellows (600) being the main body line of the feed-through channel.
5. The multi-channel EGR cooler of claim 3 wherein the through-channel is electrically automated.
6. The multi-channel EGR cooler of claim 1 wherein the barrel (520) is provided with three openings, two for water connections and the remaining opening for water discharge.
7. The multi-channel EGR cooler of claim 1 wherein the threaded heat dissipation tube (530) is a straight-through tube of a spiral configuration.
8. The multi-channel EGR cooler of claim 1 wherein the finned cooling tubes (540) are U-shaped slot structures, and the finned cooling tubes (540) are wrapped with fins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110850782.8A CN113464324A (en) | 2021-07-27 | 2021-07-27 | Multichannel EGR cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110850782.8A CN113464324A (en) | 2021-07-27 | 2021-07-27 | Multichannel EGR cooler |
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| CN113464324A true CN113464324A (en) | 2021-10-01 |
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| CN202110850782.8A Pending CN113464324A (en) | 2021-07-27 | 2021-07-27 | Multichannel EGR cooler |
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| CN104747324A (en) * | 2015-04-25 | 2015-07-01 | 无锡隆盛科技股份有限公司 | Bypass type EGR (Exhaust Gas Recirculation) cooler |
| CN204572264U (en) * | 2015-04-25 | 2015-08-19 | 无锡隆盛科技股份有限公司 | Bypass type cooler for recycled exhaust gas |
| CN204961109U (en) * | 2015-08-27 | 2016-01-13 | 北汽福田汽车股份有限公司 | EGR cooler, engine cooling system and vehicle |
| CN105201692A (en) * | 2015-10-30 | 2015-12-30 | 广西玉柴机器股份有限公司 | Internal combustion engine high-low pressure cut-off EGR system |
| CN205823489U (en) * | 2016-07-18 | 2016-12-21 | 临海市伟达汽车部件有限公司 | A kind of cooler for recycled exhaust gas for electromotor |
| CN106401807A (en) * | 2016-12-09 | 2017-02-15 | 江苏四达动力机械集团有限公司 | EGR cooler structure |
| CN206280161U (en) * | 2016-12-09 | 2017-06-27 | 江苏四达动力机械集团有限公司 | A kind of cooler for recycled exhaust gas structure |
| CN107575322A (en) * | 2017-10-31 | 2018-01-12 | 潍柴动力股份有限公司 | The control method of egr system and egr system |
| CN209539472U (en) * | 2019-03-21 | 2019-10-25 | 江西五十铃发动机有限公司 | A kind of exhaust gas recirculation device with by-passing valve |
| CN110469434A (en) * | 2019-08-16 | 2019-11-19 | 陕西重型汽车有限公司 | A kind of exhaust gas recooling system |
| CN211202156U (en) * | 2019-12-17 | 2020-08-07 | 江苏四达动力机械集团有限公司 | Diesel engine exhaust gas recirculation cooling structure |
| CN110848048A (en) * | 2019-12-30 | 2020-02-28 | 无锡隆盛科技股份有限公司 | EGR cooler |
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