CN112031960A - Front-end integrated type double-channel pulse EGR system - Google Patents
Front-end integrated type double-channel pulse EGR system Download PDFInfo
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- CN112031960A CN112031960A CN202010906938.5A CN202010906938A CN112031960A CN 112031960 A CN112031960 A CN 112031960A CN 202010906938 A CN202010906938 A CN 202010906938A CN 112031960 A CN112031960 A CN 112031960A
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
- F02B29/0437—Liquid cooled heat exchangers
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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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
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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
- F02M26/23—Layout, e.g. schematics
- F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
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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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/024—Air cleaners using filters, e.g. moistened
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention discloses a front-end integrated double-channel pulse EGR system, which is characterized in that a pulse converter is applied on the basis of a double-channel EGR system, so that the pulse energy utilization rate is further improved, the higher EGR driving capability is achieved, and the aims of improving the emission and the economy of an engine are fulfilled. Compared with the prior art, the EGR rate is improved, and EGR driving can be realized under the condition of negative pressure. The pulse converter is integrated on the front end cover of the EGR cooler, has the function of fully utilizing the exhaust pulse energy of the engine, and can effectively improve the transmission of the exhaust energy.
Description
Technical Field
The invention belongs to the technical field of engine exhaust gas recirculation, relates to an EGR (exhaust gas recirculation) system, and particularly relates to a front-end integrated two-channel pulse EGR system.
Background
EGR, an exhaust gas recirculation system, is a system that introduces a portion of the exhaust gas of an engine into a cylinder to lower the in-cylinder combustion temperature and thereby reduce NOx emissions. EGR is divided into cold EGR and hot EGR, wherein the cold EGR utilizes a cooler to cool part of exhaust and then introduces the cooled exhaust into a cylinder, the hot EGR means that the exhaust directly enters the cylinder without passing through the cooler, the temperature of the cold EGR is lower than that of the hot EGR, the lower in-cylinder combustion temperature can be realized, and the NOx emission is further reduced.
Chinese patent "a controllable EGR system of integrated binary channels EGR cooler of application", publication No. CN110500208A, publication No. 20191126 discloses a controllable EGR system of integrated binary channels EGR cooler of application, including integrated cooler and binary channels structure that constitutes by two exhaust manifolds, integrated cooler includes two mutually independent cold passageways and two hot passageways, single exhaust manifold respectively through three air flue with carry out corresponding connection with the inlet end of a cold passageway, a hot passageway, turbine, the end of giving vent to anger of cold, hot passageway is connected with the inlet end of the ware air outlet chamber that sets up in the integrated cooler, the ware air outlet chamber, the end of giving vent to anger of compressor are connected with the engine after passing through blender, air inlet manifold in proper order. The controllable EGR system with the integrated dual-channel EGR cooler can drive EGR by utilizing exhaust pulse energy, improves EGR rate and driving capacity, and can adjust EGR temperature and EGR rate in a mode of combining cold EGR and hot EGR. However, such controllable EGR systems employing integrated two-pass EGR coolers, while capable of utilizing exhaust pulse capability, are relatively low in utilizing exhaust pulse energy.
Disclosure of Invention
In view of the problems in the prior art, an object of the present invention is to provide a front-end integrated dual-channel pulse EGR system for improving the pulse energy utilization.
In order to achieve the purpose, the front-end integrated two-channel pulse EGR system comprises an engine, a supercharger compressor, a supercharger turbine, an EGR cooler and an EGR mixer, wherein the supercharger compressor is connected with one end of the engine through an air inlet manifold, the other end of the engine is connected with the supercharger turbine through an exhaust manifold, and a plurality of cylinders are arranged in the engine; the air outlet end of the supercharger compressor is connected with the air inlet end of the EGR mixer, and the air outlet end of the EGR mixer is connected with the engine through an air inlet manifold; the method is characterized in that:
the EGR cooler further comprises a pulse converter integrated on a front end cover of the EGR cooler, the pulse converter is provided with a first pulse air inlet channel and a second pulse air inlet channel which are independent of each other, and the first pulse air inlet channel and the second pulse air inlet channel are converged into a pulse air outlet channel inside the pulse converter;
the air inlet end of the EGR cooler and the pulse air outlet channel are integrated into a channel, and the air outlet end of the EGR cooler is connected with the air inlet end of the EGR mixer;
the exhaust manifold comprises a first exhaust manifold and a second exhaust manifold; the air outlet end of the first exhaust manifold is correspondingly connected with the first pulse air inlet channel and the air inlet end of the supercharger turbine through a first air channel A and a first air channel B respectively; and the air outlet end of the second exhaust manifold is correspondingly connected with the second pulse air inlet channel and the air inlet end of the supercharger turbine through a second methane channel and a second diethyl channel respectively.
Preferably, the central lines of the first pulse air inlet channel, the second pulse air inlet channel and the pulse air outlet channel are in the same plane.
Preferably, the sum of the inlet cross-sectional area of the first pulse inlet channel and the inlet cross-sectional area of the second pulse inlet channel is smaller than the outlet cross-sectional area of the pulse outlet channel.
Preferably, the cross-sectional area of the convergence position of the first pulse air inlet channel and the second pulse air inlet channel is smaller than the sum of the inlet cross-sectional area of the first pulse air inlet channel and the inlet cross-sectional area of the second pulse air inlet channel.
Preferably, the front-end integrated two-channel pulse EGR system further comprises a coolant flow regulating valve, a radiator, a thermostat and a water pump, under a small circulation working condition, the EGR cooler takes water from the water intake through the coolant flow regulating valve, and the effluent of the EGR cooler and the effluent of the water intake flow back to the water intake through the thermostat and the water pump; under the working condition of large circulation, the EGR cooler takes water from a water sending and taking port through a flow regulating valve, and the outlet water of the EGR cooler and the outlet water of the water sending port flow back to a water sending and returning port after passing through a radiator, a temperature regulator and a water pump;
be provided with inlet and liquid outlet on EGR cooler's the side wall, send out the mouth of a river and communicate with EGR cooler inside behind flow control valve, the inlet in proper order, the liquid outlet with send the mouth of a river intercommunication.
Preferably, the front-end integrated two-channel pulse EGR system further comprises a fan and an air cooler, the supercharger compressor is communicated with the air inlet end of the EGR mixer through the air cooler, and the temperature regulator is located between the radiator and the water pump.
Preferably, the air inlet end of the supercharger compressor is connected with an air filter, and the air outlet end of the supercharger turbine is connected with an exhaust aftertreatment device.
The invention has the beneficial effects that: the invention applies the pulse converter on the basis of the double-channel EGR system, further improves the utilization rate of pulse energy, achieves higher EGR driving capability and achieves the aim of improving the emission and the economy of an engine. Compared with the prior art, the EGR rate is improved, and EGR driving can be realized under the condition of negative pressure. The pulse converter is integrated on the front end cover of the EGR cooler, has the function of fully utilizing the exhaust pulse energy of the engine, and can effectively improve the transmission of the exhaust energy. The direct integration mode reduces the sealing surface and reduces the leakage risk; on the other hand, the structure is more compact and easier to arrange.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention, wherein the engine is L6,
fig. 2 is a schematic diagram of the system of the present invention, wherein the engine is L8,
in the figure, solid arrows indicate gas flow, and dashed arrows indicate coolant flow;
figure 3 is a schematic perspective view of a pulse converter according to the present invention,
figure 4 is a schematic perspective view of a pulse converter according to the present invention,
FIG. 5 is a schematic cross-sectional view of a pulse converter of the present invention;
in the figure: 1. an air cleaner; 2. a supercharger compressor; 3. an exhaust gas post-treatment device; 4. a supercharger turbine; 5. an intake manifold; 6. a first exhaust manifold; 7. an air cooler; 8. a heat sink; 9. a fan; 10. a thermostat; 11. a water pump; 12. an EGR cooler; 13. a coolant flow control valve; 14. an EGR mixer; 15. a pulse converter; 16. a second exhaust manifold; 17. an engine; 6.1, a first methane passage; 6.2, a first second air channel; 15.1, a first pulse air inlet channel; 15.2, a second pulse air inlet channel; 15.3, a pulse gas outlet channel; 16.1, second methane channel; 16.2, second airway; 17.1, sending a water return port; 17.2, a water intake; and 17.3, a water outlet.
Detailed Description
The technical solutions of the present invention (including the preferred ones) are further described in detail by way of fig. 1 to 2 and enumerating some alternative embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
As shown in fig. 1 and 2, the present invention exemplifies two embodiments, which are different in the number of cylinders of the engine 17 and the number of intake ports of the first exhaust manifold 6 and the second exhaust manifold 16.
As shown in fig. 1 to 5, the front-end integrated two-channel pulse EGR system designed by the present invention includes an engine 17, a supercharger compressor 2, a supercharger turbine 4, an EGR cooler 12 and an EGR mixer 14, wherein the supercharger compressor 2 is connected to one end of the engine 17 through an intake manifold 5, the other end of the engine 17 is connected to the supercharger turbine 4 through an exhaust manifold, and a plurality of cylinders are disposed inside the engine 17; the air outlet end of the supercharger compressor 2 is connected with the air inlet end of the EGR mixer 14, and the air outlet end of the EGR mixer 14 is connected with the engine 17 through the air inlet manifold 5;
the EGR cooler further comprises a pulse converter 15 integrated on a front end cover of the EGR cooler, the pulse converter 15 is provided with a first pulse air inlet channel 15.1 and a second pulse air inlet channel 15.2 which are independent of each other, and the first pulse air inlet channel 15.1 and the second pulse air inlet channel 15.2 are converged into a pulse air outlet channel 15.3 inside the pulse converter 15;
the air inlet end of the EGR cooler 12 is connected with the air outlet end of the pulse air outlet channel 15.3 through a pipeline, and the air outlet end of the EGR cooler 12 is connected with the air inlet end of the EGR mixer 14;
the exhaust manifolds include a first exhaust manifold 6 and a second exhaust manifold 16; the air outlet end of the first exhaust manifold 6 is correspondingly connected with the first pulse air inlet channel 15.1 and the air inlet end of the supercharger turbine 4 through a first A air channel 6.1 and a first B air channel 6.2 respectively; and the air outlet end of the second exhaust manifold 16 is correspondingly connected with the air inlet end of the second pulse air inlet channel 15.2 and the supercharger turbine 4 through a second methanol channel 16.1 and a second diethyl air channel 16.2 respectively.
As shown in fig. 3 to 5, it is preferable that the center lines of the first pulse inlet channel 15.1, the second pulse inlet channel 15.2 and the pulse outlet channel 15.3 are in the same plane. The sum of the inlet section area of the first pulse inlet channel 15.1 and the inlet section area of the second pulse inlet channel 15.1 is smaller than the outlet section area of the pulse outlet channel 15.3. The cross sectional area of the position where the first pulse air inlet channel 15.1 and the second pulse air inlet channel 15.2 are converged is smaller than the sum of the inlet cross sectional area of the first pulse air inlet channel 15.1 and the inlet cross sectional area of the second pulse air inlet channel 15.2. The inlet cross-sectional area of the first pulse inlet channel 15.1 is equal to the inlet cross-sectional area of the second pulse inlet channel 15.2.
As shown in fig. 1 and 2, the front-end integrated dual-channel pulse EGR system further includes a coolant flow regulating valve 13, a radiator 8, a thermostat 10, and a water pump 11, under a small circulation condition, the EGR cooler 12 takes water from a water intake port 17.2 through the coolant flow regulating valve 13, and the effluent of the EGR cooler 12 and the effluent of the water intake port 17.3 flow back to a water intake port 17.1 after passing through the thermostat 10 and the water pump 11; under the working condition of large circulation, the EGR cooler 12 takes water from a water sending and taking port 17.2 through a flow regulating valve, and the effluent of the EGR cooler 12 and the effluent of the water sending port 17.3 flow back to a water sending and returning port 17.1 after passing through the radiator 8, the temperature regulator 10 and the water pump 11;
be provided with inlet and liquid outlet on the side wall of EGR cooler 12, send out water intake 17.2 and communicate with EGR cooler 12 is inside behind flow control valve, the inlet in proper order, the liquid outlet with send out water intake 17.3 intercommunication.
Preferably, the front-end integrated two-channel pulse EGR system further comprises a fan 9 and an air cooler 7, the supercharger compressor 2 is communicated with an air inlet end of an EGR mixer 14 through the air cooler 7, and a temperature regulator 10 is located between a radiator 8 and a water pump 11.
Preferably, the air inlet end of the supercharger compressor 2 is connected with the air filter 1, and the air outlet end of the supercharger turbine 4 is connected with the exhaust gas post-treatment device 3.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and any modification, combination, replacement, or improvement made within the spirit and principle of the present invention is included in the scope of the present invention.
Claims (7)
1. A front-end integrated two-channel pulse EGR system comprises an engine, a supercharger compressor, a supercharger turbine, an EGR cooler and an EGR mixer, wherein the supercharger compressor is connected with one end of the engine through an air inlet manifold, the other end of the engine is connected with the supercharger turbine through an exhaust manifold, and a plurality of cylinders are arranged in the engine; the air outlet end of the supercharger compressor is connected with the air inlet end of the EGR mixer, and the air outlet end of the EGR mixer is connected with the engine through an air inlet manifold; the method is characterized in that:
the EGR cooler further comprises a pulse converter integrated on a front end cover of the EGR cooler, the pulse converter is provided with a first pulse air inlet channel and a second pulse air inlet channel which are independent of each other, and the first pulse air inlet channel and the second pulse air inlet channel are converged into a pulse air outlet channel inside the pulse converter;
the air inlet end of the EGR cooler and the pulse air outlet channel are integrated into a channel, and the air outlet end of the EGR cooler is connected with the air inlet end of the EGR mixer;
the exhaust manifold comprises a first exhaust manifold and a second exhaust manifold; the air outlet end of the first exhaust manifold is correspondingly connected with the first pulse air inlet channel and the air inlet end of the supercharger turbine through a first air channel A and a first air channel B respectively; and the air outlet end of the second exhaust manifold is correspondingly connected with the second pulse air inlet channel and the air inlet end of the supercharger turbine through a second methane channel and a second diethyl channel respectively.
2. The front-end integrated dual channel pulsed EGR system of claim 1, wherein: the central lines of the first pulse air inlet channel, the second pulse air inlet channel and the pulse air outlet channel are in the same plane.
3. The front-end integrated dual channel pulse EGR system of claim 1 or 2, wherein: the sum of the inlet section area of the first pulse air inlet channel and the inlet section area of the second pulse air inlet channel is smaller than the outlet section area of the pulse air outlet channel.
4. The front-end integrated dual channel pulse EGR system of claim 1 or 2, wherein: the cross sectional area of the convergence position of the first pulse air inlet channel and the second pulse air inlet channel is smaller than the sum of the inlet cross sectional area of the first pulse air inlet channel and the inlet cross sectional area of the second pulse air inlet channel.
5. The front-end integrated dual channel pulsed EGR system of claim 1, wherein: the EGR cooler takes water from a water sending and taking port through the cooling liquid flow regulating valve under a small circulation working condition, and the effluent of the EGR cooler and the effluent of the water sending port flow back to a water sending and returning port after passing through the temperature regulator and the water pump; under the working condition of large circulation, the EGR cooler takes water from a water sending and taking port through a flow regulating valve, and the outlet water of the EGR cooler and the outlet water of the water sending port flow back to a water sending and returning port after passing through a radiator, a temperature regulator and a water pump;
be provided with inlet and liquid outlet on EGR cooler's the side wall, send out the mouth of a river and communicate with EGR cooler inside behind flow control valve, the inlet in proper order, the liquid outlet with send the mouth of a river intercommunication.
6. The front-end integrated dual channel pulsed EGR system of claim 1, wherein: the air compressor of the supercharger is communicated with the air inlet end of the EGR mixer through the air cooler, and the temperature regulator is positioned between the radiator and the water pump.
7. The front-end integrated dual channel pulsed EGR system of claim 1, wherein: the air inlet end of the supercharger compressor is connected with the air filter, and the air outlet end of the supercharger turbine is connected with the exhaust aftertreatment device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010906938.5A CN112031960A (en) | 2020-08-31 | 2020-08-31 | Front-end integrated type double-channel pulse EGR system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010906938.5A CN112031960A (en) | 2020-08-31 | 2020-08-31 | Front-end integrated type double-channel pulse EGR system |
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| CN112031960A true CN112031960A (en) | 2020-12-04 |
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| CN202010906938.5A Pending CN112031960A (en) | 2020-08-31 | 2020-08-31 | Front-end integrated type double-channel pulse EGR system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001083088A1 (en) * | 2000-05-02 | 2001-11-08 | Volvo Teknisk Utveckling Ab | Device and method for reduction of a gas component in an exhaust gas flow of a combustion engine |
| US20040011036A1 (en) * | 2000-05-22 | 2004-01-22 | Ove Sponton | Method and device for exhaust recycling and supercharged diesel engine |
| CN110410237A (en) * | 2018-04-26 | 2019-11-05 | 上海汽车集团股份有限公司 | EGR integrated system and its inlet manifold |
| CN110500208A (en) * | 2019-07-29 | 2019-11-26 | 东风商用车有限公司 | A kind of controllable egr system of application integration binary channels cooler for recycled exhaust gas |
-
2020
- 2020-08-31 CN CN202010906938.5A patent/CN112031960A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001083088A1 (en) * | 2000-05-02 | 2001-11-08 | Volvo Teknisk Utveckling Ab | Device and method for reduction of a gas component in an exhaust gas flow of a combustion engine |
| US20040011036A1 (en) * | 2000-05-22 | 2004-01-22 | Ove Sponton | Method and device for exhaust recycling and supercharged diesel engine |
| CN110410237A (en) * | 2018-04-26 | 2019-11-05 | 上海汽车集团股份有限公司 | EGR integrated system and its inlet manifold |
| CN110500208A (en) * | 2019-07-29 | 2019-11-26 | 东风商用车有限公司 | A kind of controllable egr system of application integration binary channels cooler for recycled exhaust gas |
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