GB2520647A - Dual exhaust gas recirculation cooling device - Google Patents

Dual exhaust gas recirculation cooling device Download PDF

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Publication number
GB2520647A
GB2520647A GB1502089.4A GB201502089A GB2520647A GB 2520647 A GB2520647 A GB 2520647A GB 201502089 A GB201502089 A GB 201502089A GB 2520647 A GB2520647 A GB 2520647A
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GB
United Kingdom
Prior art keywords
exhaust gas
pressure end
gas recirculation
valve seat
high pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB1502089.4A
Other versions
GB201502089D0 (en
GB2520647B (en
Inventor
Yujun Wang
Zhao Duan
Yimin Li
Zhengdong Liu
Zhen Cao
Xiaofeng Pang
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SAIC Motor Corp Ltd
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SAIC Motor Corp Ltd
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Publication date
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Publication of GB201502089D0 publication Critical patent/GB201502089D0/en
Publication of GB2520647A publication Critical patent/GB2520647A/en
Application granted granted Critical
Publication of GB2520647B publication Critical patent/GB2520647B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
    • 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
    • F02M26/23—Layout, e.g. schematics
    • 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
    • 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
    • F02M26/23—Layout, e.g. schematics
    • F02M26/24—Layout, e.g. schematics with two or more coolers
    • 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
    • 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
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
    • 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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  • 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

Disclosed is a dual exhaust gas recirculation cooling device, comprising a low-pressure end valve seat having a low-pressure end exhaust gas inlet and outlet, a cooler detachably fixed with the low-pressure end valve seat, a low-pressure end exhaust gas recirculation valve detachably fixed with the low-pressure end valve seat, a high-pressure end valve seat detachably fixed with the cooler and having a high-pressure end exhaust gas inlet and outlet, and a high-pressure end exhaust gas recirculation valve detachably fixed with the high-pressure end valve seat. In a first exhaust gas recirculation loop, exhaust gas enters from the low-pressure end exhaust gas inlet, passes through the low-pressure end exhaust gas recirculation valve and the cooler, and flows out of the low-pressure end exhaust gas outlet; and the low-pressure end exhaust gas recirculation valve controls the flow of the exhaust gas in the first exhaust gas recirculation loop. In a second exhaust gas recirculation loop, exhaust gas enters from the high-pressure end exhaust gas inlet, passes through the high-pressure end exhaust gas recirculation valve, and flows out of the high-pressure end exhaust gas outlet; and the high-pressure end exhaust gas recirculation valve controls the flow of the exhaust gas in the second exhaust gas recirculation loop.

Description

Twin Exhaust Gas Recirculation Cooling Device
FIELD OF THE INVENTION
[0001] The invention relates to the field of automobile engines, in particular, to a twin exhaust gas recireulation cooling device.
BACKGROUND
[0002] With the continuous increase of existing automobiles in various countries, the environment in which we human being live are getting worse and worse. The limitations imposed on automobile emission by the authority are becoming increasingly stricter. In Europe, the EU V emission standard is being executed. k the very near future, EU VI standard will also be executed quickly. However, in China, the EU W emission standard was requested to he executed in some cities since early in 2011. and the EU V and EU VI standards will he gradually carried out in the future several year. Therefore, more and more advanced technologies are being put into practice in engines in order to meet emission requirements that are becoming increasingly strict.
[0003] The exhaust gas recirculation technology can be used to reduce the temperature of exhaust gas and improve the density of recirculated exhaust gas, thus considerably reducing NOx in the exhaust gas. Currently, in order to meet requirements for EU IV and V standards, a high pressure exhaust gas recirculation solution is used for exhaust gas recirculation cooler. When the emission of engine is required to meet EU VI standard, some technology routes will increase low pressure exhaust gas recirculation so as to adapt to new regulations and requirements. However, it would be very difficult to configure high pressure and low pressure exhaust gas recirculation in a very limited engine space.
Moreover, since the installation is complicated, human labor cost will be increased and the competitiveness of engine in the market will be reduced.
[0004] It is therefore necessary to provide an improved technical solution so as to overcome existing technical problems in the pnor art.
SUMMARY OF THE INVENTION
[0005] The main technical problem to be addressed by the invention is that in the prior art, disposing high pressure and low pressure exhaust gas reeirculation coolers in a limited space will he difficult and the assembly process will he complicated.
[0006] Tn order to solve the above technical problem. the invention provides a twin exhaust gas recirculation cooling device, comprising: a low pressure end valve seat which has a low pressure end exhaust gas inlet and a low pressure end exhaust gas outlet; a cooler which is detachably fixed to the low pressure end valve seat; a low pressure end exhaust gas reeirculation valve which is detachably fixed to the low pressure end valve scat; a high pressure end valve seat which is detachably fixed to the cooler and has a high pressure end exhaust gas inlet and a high pressure end exhaust gas outlet: a high pressure end exhaust gas recirculation valve which is detachably fixed to (he high pressure end valve seat; wherein in a first exhaust gas reeirculation circuit, the exhaust gas flows in from the low pressure end exhaust gas inlet of the low pressure end valve seat, passes through the low pressure end exhaust gas recirculation valve and the coolei; and flows out from the low pressure end exhaust gas outlet of the low pressure end valve seat, and the ow pressure end exhaust gas recirculation valve controls the flow of exhaust gas in the first exhaust gas recireulation circuit; in a second exhaust gas reeirculation circuit, the exhaust gas flows in from the high pressure end exhaust gas inlet of the high pressure end valve seat, passes through the high pressure end exhaust gas recireulation valve, and flows out from the high pressure end exhaust gas outlet of the high pressure end valve seat, and the high pressure end exhaust gas recireulation valve controls the flow of exhaust gas in the second exhaust gas recirc&ation circuit.
[0007] Optionally, in the above twin exhaust gas rccire&ation cooling device, the low pressure end valve seat and the low pressure end exhaust gas reeirculation valve are fixed by fixing bolts and sealed by a low pressure end exhaust gas recirculation valve washer.
[0008] Optionally, in the above twin exhaust gas recirc&ation cooling device, the low pressure end valve seat and the cooler are fixed by fixing bolts and sealed by a low pressure end valve seat washer [0009] Optionally, in the above twin exhaust gas recirculation cooling device, the high pressure end valve seat and the high pressure end exhaust gas recirculation valve are fixed by fixing bolts and sealed by a high pressure end exhaust gas recirculation valve washer.
[0010] Optionally, in the above twin exhaust gas recirculation cooling device, the high pressure end valve seat and the cooler are fixed by fixing bolts and sealed by a high pressure end valve seat washer [0011] Optionally, in the above twin exhaust gas recirculation cooling device, the twin cxhaust gas recirculation cooling dcvice further comprises a coolant inlet and a water outlet pipe; in the coolant circulating circuit, the coolant flows in from the coolant inlet, passcs through the cooler, and flows out from the water outlct pipe, the coolant exchanges heat in the cooler with exhaust gas passing through the cooler in the Iirst exhaust gas recirculation circuit.
[0012] Optionally, in the above twin exhaust gas recirculation cooling device, a cooling jacket in fluid communication with the cooler is provided inside the low pressure end valve seat, the coolant flows in from the coolant inlet, passes through the cooler and the cooling jacket, and flows out from the water outlet pipc.
[0013] Optionally, in the above twin cxhaust gas rccireulation cooling device, a cooling jacket is provided inside the high pressure end valve seat, the coolant inlet is in communication with the high pressure end valve seat; in the coo'ant circulating circuit, the coolant flows into the high pressure end valve seat from the coolant inlet and is divided into two branches inside the high pressure end valve seat, the first branch passes through the cooler to flow into the cooling jacket inside the low pressure end valve seat, and then flows back to the cooler and flows out through the water outlet pipe; the second branch passes through the cooling jacket inside the high pressure end valve seat, flows into the cooler and flows out through the water outlet pipe.
[0014] Optionally, in the above twin exhaust gas recirculation cooling device, a certain number of pipe bundles are provided inside the cooler.
[0015] Optionally, in the above twin exhaust. gas recirculation cooling device, the cooler comprises a housing on which a plurality of reinforcing ribs are provided.
[0016] By integrating the high pressure exhaust gas recirculation and the thw pressure exhaust gas recirculation together in die twin exhaust gas recirculation cooling device according to the invention, an exhaust gas recirculation cooling module can be conveniently arranged. thus the problems in terms of the difficulty in mTanging high pressure exhaust gas recircifiation and the low pressure exhaust gas recirculation together and inability of assembly can he solved. Moreover, a variety of potential risks can he reduced, and the engine for EU IV and V can be easily updated to meet requirements for EU VI mission.
[0017] Other aspect and characteristics of the invention will become apparent from the detailed description given below with reference to the accompanying drawings. However, it is understood that the accompanying drawings are provided merely for the purpose of explanation. rather than limiting the scope of the invention since the scope of protection should he determined with reference to the appended claims. It is also understood that the accompanying drawings merely serve to schematically illustrate the structure and flowchart described herein and are not necessarily drawn to scale unless otherwise specified.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The invention will be more fully understood with reference to the specific cmhcdinicrits dcscribed in detail hereinafter in conjunction with accompanying drawings, in which identical reference signs denote identical elements throughout the drawings, wherein: Fig. 1 shows a schematic structure view of a twin exhaust gas recirculation cooling device according to a specific embodiment of the invention; Fig. 2 shows a schematic view of a first exhaust gas recirculation circuit of a twin exhaust gas recirculation cooling device according to a specific embodiment of the invention; Fig. 3 shows a schematic view of a second exhaust gas recirculation circuit of a twin exhaust gas recirculation cooling device according to a specific embodiment of the invention; and Fig. 4 is a schematic view showing a coolant circulating circuit of a twin exhaust gas recirculation cooling device according to a specific embodiment of the invention.
DETAILED DESCRIPTION OF THE INVENTION
[0019] In ordcr that thosc skilled in the art can thoroughly understand the subject matter claimed by the utility model, the specific embodiments of the utility model will he described in detail hereinafter with reference to the drawings.
[0020] In view of the problems in terms of the difficulty in arranging high pressure and low pressure exhaust gas recirculation coolers in a limited space and complicated assembly process existing iii the prior art, the invention provides a twin exhaust gas recirculalion cooling device. Fig. 1 shows a structure view of a twin exhaust gas recirculation cooling device 100 according to a specific embodiment of the invention. As shown in Fig. 1, the twin exhaust gas rccirculation cooling device 100 according to the specific embodiment comprises a low pressure end valve scat 1, a cooler 2 which is dctachahly fixed to the low pressure end valve seat 1. a low pressure end exhaust gas recirculation valve 3 which is detachably fixed to the low pressure end valve seat 1. a high pressure end valve seat 4 which is detachably fixcd to the cooler 2. and a high pressure end exhaust gas recirculation valve 5 which is detachably fixed to the high pressure end valve scat 4. wherein the low pressure end valve seat 1 has a low pressure end exhaust gas inlet 11 and a low pressure end exhaust gas outlet 12, and the high pressure end valve scat 4 has a high pressure end exhaust gas inlet 41 and a high pressure end exhaust gas outlet 42.
[0021] Fig. 2 shows a schematic view of a first exhaust gas recirculation circuit of a twin exhaust gas recirculation cooling device 100 according to a specific embodiment of the invention. With reference to Figs. 1 and 2. in a first exhaust gas recirculation circuit, the exhaust gas flows in from the low pressure end exhaust gas inlet 11 of the low pressure end valve seat 1, passes through the low pressure end exhaust gas recirculation valve 3 and the cooler 2, and flows out from the low pressure end exhaust gas outlet 12 of the low pressure end valve seat 1, and the low pressure end exhaust gas reeireulation valve 3 controls the flow of exhaust gas in the first exhaust gas recireulation circuit.
[0022] Fig. 3 shows a schematic view of a second exhaust gas recirculation circuit of a twin exhaust gas recirculation cooling device according to a specific embodiment of the invention. With reference to Figs. I and 3, in a second exhaust gas recirculation circuit, the exhaust gas flows in from the high pressure end exhaust gas inlet 41 of the high pressure end valve seat 4, passes through the high pressure end exhaust gas recirculation valve 5.
and flows out from the high pressure end exhaust gas outlet 42 of the high pressure end valvc seat 4. and the high pressure cnd exhaust gas recirculation valve 5 controls the flow of exhaust gas in the second exhaust gas recirculation circuit.
[0023] The low pressure end valve seat 1. the low pressure end exhaust gas recirculation valve 3 and the cooler 2 constitute the low pressure exhaust gas recirculation portion of the twin exhaust gas recirculation cooling device 100 of the invention, whereas the high pressure end valve seat 4 and the high pressure end exhaust gas recirculation valve 5 constitute the high pressure exhaust gas recirculation portion of the twin exhaust gas recirculation cooling device 100 of the invention. The twin exhaust gas reeirculation cooling device 100 of the invention elaborately integrates the low pressure exhaust gas recirculation portion and the high pressure exhaust gas recirculation portion together.
[0024] Optionally. the low pressure end valve seat 1 and the low pressure end exhaust gas recirculation valve 3 are fixed by fixing bolts 6 and sealed by a low pressure end exhaust gas recirculation valve washer 31. Optionally. the low pressure end valve seat 1 and the cooler 2 are fixed by fixing bolts 6 and sealed by a low pressure end valve seat washer 13.
[0025] Optionally, the high pressure end valve seat 4 and the high pressure end exhaust gas recireulation valve 5 are fixed by fixing bolts 6 and sealed by a high pressure end exhaust gas recirculation valve washer 51. Optionally, the high pressure end valve seat 4 and the cooler 2 arc fixed by fixing bolts 6 and sealed by a high pressure end valve seat washer 43.
[0026] In an optional specific embodiment, the twin exhaust gas recirculation cooling device 100 of the invention further comprises a coolant inlet 21 and a water outlet pipe 22; in the coolant circulating circuit, the coolant flows in from the coolant inlet 21, passes through the cooler 2, and flows out from the water outlet pipe 22. the coolant exchanges S heat in the cooler 2 with exhaust gas passing through the cooler 2 in the first exhaust gas recireulation circuit. For example. the cooler 2 comprises a housing, and a certain number of pipe bundles are provided inside the cooler 2. The coolant circulates outside the pipe bundles and the exhaust. gas flows inside the pipe bundles so that the coolant outside the pipc bundles and the exhaust gas inside the pipe bundles exchange heat with each other, and the coolant therefore absorbs heat from the exhaust gas to cool the exhaust gas.
Optionally, a p'urality of reinforcing ribs are provided on the housing for improving the rigid of the housing.
[0027] A cooling jacket in fluid communication with the cooler 2 is provided inside the low pressure end valve seat 1, thus reducing the influence of the exhaust gas temperature on the low pressure end exhaust gas recirculation valve 3. The coolant flows in from the coolant inlet 21, passes through the cooler 2 and the cooling jacket in sequence. and flows out from the water outlet pipe 22. A cooling jacket is provided inside the high pressure end valve seat 4 for reducing the influence of the exhaust gas temperature on the high pressure end exhaust gas recirculation valve 5. The coolant inlet 21 is in communication with the high pressure end valve seat 4.
[0028] Fig. 4 is a schematic view showing a coolant circulating circuit of a twin exhaust gas recirculation cooling device according to a specific embodiment of the invention. As shown in Fig. 4. in the coolant circulating circuit, the coolant flows into the high pressure end valve seat 4 from the coolant inlet 21 and is divided into two branches inside the high pressure end valve seat 4, the first branch passes through the cooler 2 to flow into the cooling jacket inside the low pressure end valve seat 1, and then flows back to the cooler 2 and flows out through the water outlet pipe 22; the second branch passes through the cooling jacket inside the high pressure end valve seat 4. (lows into the co&er 2 and flows out through the water outlet pipe 22.
[0029] By integrating the high pressure exhaust gas recirculation and the thw pressure exhaust gas recirculation together in the twin exhaust gas recirculation cooling device 100 according to the invention, an exhaust gas recirculation cooling module can be conveniently arranged. thus the problems in terms of the difficulty in ananging high pressure exhaust gas recirculation and the low pressure exhaust gas reeireulation together S and inability of assembly can he s6lved. Moreover, a variety oF potential risks can he reduced, and the engine for EU IV and V can he easily updated to meet requirements for EU VI mission.
[0030] The above specific embodiments are used for the purpose of merely illustrating the invention, rather than limiting the invention in any way. Those with ordinary skills in the art can also make various variations and modification to the invention without departing from the scopc of thc invcntion. Therefore, all the equivalent technical solutions will also fall within the scope of the invention, which should be defined by the appended claims.

Claims (10)

  1. CLAIMS1. A twin exhaust gas recirculation cooling device (100), characterized by comprising: a low pressure end valve seat (1) which has a low pressure end exhaust gas inlet (11) and a low pressure end exhaust gas outlet (12): a cooler (2) which is detachably fixed to the low pressure end valve seat (1); a ow pressure end exhaust gas recirculation valve (3) which is detachably fixed to the low pressure end valve seat (1); a high pressure end valve seat (4) which is detachably fixed to the cooler (2) and has a high pressure end exhaust gas inlet (41) and a high pressure end exhaust gas outlet @2); and a high pressure end exhaust gas recirculation valve (5) which is detachably fixed to the high pressure end valve seat 4); wherein in a first exhaust gas recirculation circuit, the exhaust gas flows in from the low pressure end exhaust gas inlet (11) of the low pressure end valve scat (1), passes through the low pressure end exhaust gas recirculation valve (3) and the cooler (2). and flows out from the low pressure end exhaust gas outlet (12) of the low pressure end valve seat (1), and the low pressure end exhaust gas reeirculation valve (3) controls the flow of exhaust gas in the first exhaust gas recirculation circuit; in a second exhaust gas recirculation circuit, the exhaust gas flows in from the high pressure end exhaust gas inlet (41) of the high pressure end valve seat (4), passes through the high pressure end exhaust gas rccirculation valve (5), and flows out from the high pressure end exhaust gas outlet (42) of the high pressure end valve seat (4), and the high pressure end exhaust gas recirculation valve (5) controls the flow of exhaust gas in the second exhaust gas recirculation circuit.
  2. 2. The twin exhaust gas recirculation cooling device (100) according to claim 1. wherein the low pressure end valve seat (1) and the low pressure end exhaust gas recirculation valve (3) are fixed by fixing bolts (6) and sealed by a low pressure end exhaust gas recirculation valve washer (31).
  3. 3. The twin exhaust gas recirculation cooling device (100) according to claim 1. wherein the low pressure end valve seat (1) and the cooler (2) are fixed by fixing bolts (6) and sealed by a low pressure end valve seat washer (13).
  4. 4. The twin exhaust gas recirculation coohng device (100) according to claim I, wherein the high pressure end valve seat (4) and the high pressure end exhaust gas recirculation valve (5) are fixed by fixing bolts (6) aM sealed by a high pressure end exhaust gas recirculation valve washer (51).
  5. 5. The twin exhaust gas recirculation cooling device (100) according to claim 1. wherein the high pressure end valve seat (4) and the cooler) are fixed by fixing bolts (6) and sealed by a high pressure end valve seat washer (43).
  6. 6. The twin exhaust gas reeirculation cooling device (100) according to claim 1, further comprising a coolant inlet (21) and a water outlet pipe (22); in the coolant circulating circuit, the coolant flows in from the coolant inlet (21), passes through the cooler (2), and flows out from the water outlet pipe (22), the coolant exchanges heat in the cooler (2) with exhaust gas passing through the cooler (2) in the first exhaust gas rccirculation circuit.
  7. 7. The twin exhaust gas recirculation cooling device (100) according to claim 6, wherein a cooling jacket in fluid communication with the cooler (2) is provided inside the low pressure end valve seat (2), the coolant flows in from the coolant inlet (21). passes through the cooler (2) and the cooling jacket, and flows out from the water outlet pipe (22).
  8. 8. The twin cxhaust gas recirculation cooling device (100) according to claim 7, wherein a cooling jackct is provided inside the high pressure end valve scat 4), the coolant inlet (21) is in communication with the high pressure end va've seat (4); in the coolant circulating circuit, the coolant flows into the high pressure end valve seat (4) from ihe coolant inlet (21) and is divided into two branches inside the high pressure end valve seat (4), the first branch passes through the cooler (2) to flow into the cooling jacket inside the low pressure end valve seat (1), and then flows back to the cooler (2) and flows out through the water outlet pipe (22): the second branch passes through the cooling jacket inside the high S pressure end valve seat (4), flows into the cooler (2) and Ilows out through the water outlet pipe (22).
  9. 9. The twin exhaust gas recirculation cooling device (100) according to claim 1, wherein a certain number of pipe bundles are provided inside the cooler (2).
  10. 10. The twin exhaust gas recirculation cooling device (100) according to claim 1, wherein the coolcr) comprises a housing on which a plurality of reinforcing ribs (23) are provided.
GB1502089.4A 2012-08-15 2013-07-29 Twin exhaust gas recirculation cooling device Expired - Fee Related GB2520647B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201210289485.1A CN103590928B (en) 2012-08-15 2012-08-15 Two exhaust gas recirculation cooling device
PCT/CN2013/080351 WO2014026538A1 (en) 2012-08-15 2013-07-29 Dual exhaust gas recirculation cooling device

Publications (3)

Publication Number Publication Date
GB201502089D0 GB201502089D0 (en) 2015-03-25
GB2520647A true GB2520647A (en) 2015-05-27
GB2520647B GB2520647B (en) 2018-12-26

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GB1502089.4A Expired - Fee Related GB2520647B (en) 2012-08-15 2013-07-29 Twin exhaust gas recirculation cooling device

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CN (1) CN103590928B (en)
GB (1) GB2520647B (en)
WO (1) WO2014026538A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104343583B (en) * 2014-08-29 2017-05-10 长城汽车股份有限公司 Double-loop EGR (exhaust gas recirculation) valve and vehicle with same
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CN115559835A (en) * 2022-09-30 2023-01-03 中船动力研究院有限公司 Exhaust gas recirculation system of dual-fuel engine

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CN103590928A (en) 2014-02-19

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