CN112963271B - EGR system with intelligent thermal management - Google Patents
EGR system with intelligent thermal management Download PDFInfo
- Publication number
- CN112963271B CN112963271B CN202110294670.9A CN202110294670A CN112963271B CN 112963271 B CN112963271 B CN 112963271B CN 202110294670 A CN202110294670 A CN 202110294670A CN 112963271 B CN112963271 B CN 112963271B
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- egr
- outlet
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- pipeline
- intelligent
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003054 catalyst Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000004939 coking Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 29
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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
- F02M26/02—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
- F02M26/13—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
-
- 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
- F02M26/33—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 controlling the temperature of the recirculated gases
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses an EGR system with intelligent thermal management, which comprises a cylinder body, an EGR cooler, an EGR water inlet pipeline, an intelligent valve, an air inlet pipeline, an exhaust pipeline, a supercharger, an EGR air inlet pipeline and an EGR air outlet pipeline. The EGR water inlet pipeline is arranged between the EGR cooler and the cylinder body; the intelligent valve is arranged on the EGR water inlet pipeline; one end of the air inlet pipeline is communicated with the air inlet end of the cylinder body; one end of the exhaust pipeline is communicated with the exhaust end of the cylinder body; the front end of the supercharger is communicated with the other end of the air inlet pipeline, and the rear end of the supercharger is communicated with the other end of the exhaust pipeline; the EGR air inlet pipeline is communicated between the exhaust pipeline and the air inlet end of the EGR cooler; the EGR outlet pipeline is communicated between the inlet pipeline and the outlet end of the EGR cooler. The EGR system with intelligent thermal management can improve the outlet air temperature of the EGR cooler and prevent icing and coking.
Description
Technical Field
The present invention relates to the field of diesel engines for EGR (exhaust gas recirculation) systems, and more particularly to an EGR system with intelligent thermal management.
Background
EGR (exhaust gas recirculation) systems are engine-reduced NO x Core technology of emission. EGR is the most effective NO, especially at low temperature conditions x One of the control techniques. There are four general forms of existing EGR systems: high pressure cooled EGR (exhaust gas recirculation) system, high pressure uncooled EGR (exhaust gas recirculation) system, low pressure EGR (exhaust gas recirculation) cooled EGR system, low pressure uncooled EGR (exhaust gas recirculation) system. The invention innovates aiming at a high-pressure cooling EGR system, and the intelligent valve is introduced into the water inlet pipe in front of the EGR cooler, so that the water flow of the cooler is intelligently controlled in combination with the operation condition of the engine, thereby realizing the performance of low emission and high reliability of the engine.
The design of the existing EGR (exhaust gas recirculation) system consists of an EGR cooler, an EGR valve and an EGR pipeline, under the control of the EGR valve, part of exhaust gas of an engine enters an engine cylinder through the EGR pipeline and the EGR cooler and the EGR valve to participate in the combustion process, and the main technical defects are that:
1. the water vapor in the EGR exhaust gas may condense into a liquid state in a low temperature environment. When the engine is in a low-temperature environment, after the engine is stopped, the temperature of the pipeline is reduced, condensed water is separated out and frozen, and serious faults such as pipeline blockage, EGR valve clamping stagnation and the like can be caused.
2. Because the design of the EGR cooler needs to meet the requirements of different EGR flows, in order to meet the cooling capacity of the use working condition of high EGR rate, the outlet temperature of the EGR cooler is difficult to ensure to be at reasonable temperature (120-180 ℃) under the condition of using the EGR due to the cooling capacity of the stronger EGR cooler, the outlet temperature of the EGR cooler is even lower than 100 ℃ under partial working conditions, and low-temperature waste gas passes through an exhaust gas flowmeter and an EGR valve, and the accumulation of substances such as carbon particles and the like is caused by the throttling of the valve and the slow air flow speed of the valve in the EGR valve, so that the substances are mixed with water vapor to form coking, and serious faults that the EGR valve is difficult to open are caused.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide an EGR system with intelligent thermal management, which can improve the outlet air temperature of an EGR cooler and prevent icing and coking phenomena.
In order to achieve the above object, the present invention provides an EGR system with intelligent thermal management, including a cylinder block, an EGR cooler, an EGR intake pipe, an intelligent valve, an intake pipe, an exhaust pipe, a supercharger, an EGR intake pipe, and an EGR outlet pipe. The EGR water inlet pipeline is arranged between the EGR cooler and the cylinder body; the intelligent valve is arranged on the EGR water inlet pipeline; one end of the air inlet pipeline is communicated with the air inlet end of the cylinder body; one end of the exhaust pipeline is communicated with the exhaust end of the cylinder body; the front end of the supercharger is communicated with the other end of the air inlet pipeline, and the rear end of the supercharger is communicated with the other end of the exhaust pipeline; the EGR air inlet pipeline is communicated between the exhaust pipeline and the air inlet end of the EGR cooler; the EGR outlet pipeline is communicated between the inlet pipeline and the outlet end of the EGR cooler.
In a preferred embodiment, during the cold start phase of the engine, the intelligent valve is closed and the high temperature exhaust gas heats the EGR system via the exhaust line, the EGR inlet line, the EGR cooler and the EGR outlet line.
In a preferred embodiment, the EGR system with intelligent thermal management further includes an EGR valve disposed on the EGR outlet line.
In a preferred embodiment, during low temperature operation of the engine, the intelligent valve is partially open and the EGR valve is open, and high temperature exhaust gas enters the cylinder block via the exhaust line, the EGR inlet line, the EGR cooler, the EGR outlet line, the EGR valve, and the inlet line.
In a preferred embodiment, the EGR system with intelligent thermal management further includes an exhaust gas flow meter disposed on the EGR outlet line between the EGR valve and the outlet end of the EGR cooler.
In a preferred embodiment, the temperature at the outlet end of the EGR cooler can be controlled above 120 ℃ by monitoring the opening degree of the exhaust gas flow control intelligent valve of the exhaust gas flow meter in case of low load operation of the engine.
In a preferred embodiment, the EGR system with intelligent thermal management further includes an intercooler and a throttle; the intercooler is arranged on the air inlet pipeline and is positioned between the front end of the supercharger and the EGR air outlet pipeline; the throttle valve is arranged on the air inlet pipeline and is positioned between the intercooler and the EGR air outlet pipeline.
In a preferred embodiment, the EGR system with intelligent thermal management further includes an air cleaner and a catalyst; the air filter is arranged at the upstream of the front end of the supercharger; the catalyst is disposed downstream of the rear end of the supercharger.
Compared with the prior art, the EGR system with intelligent thermal management has the following beneficial effects: by installing the intelligent valve at the inlet position of the water inlet pipe of the EGR cooler, the opening of the intelligent valve is controlled to form intelligent control with the outlet air temperature of the EGR cooler, the water temperature of the engine and the working condition of the engine, the outlet air temperature of the EGR cooler is improved, and the phenomena of icing and coking are prevented. In the running stage of the engine of the cooler, the opening of an intelligent valve at the inlet of the EGR cooler is reduced, the cooling-free EGR is realized, and the combustion temperature in the cylinder is improved by introducing high-temperature EGR waste gas into the cylinder, so that the evaporation and mixing of oil gas are improved, and the CO and HC emission is improved.
Drawings
FIG. 1 is a schematic diagram of an EGR system with intelligent thermal management according to an embodiment of the present invention.
The main reference numerals illustrate:
1-cylinder block, 2-EGR inlet line, 3-intelligent valve, 4-EGR cooler, 5-exhaust line, 6-catalyst, 7-booster, 8-air cleaner, 9-intercooler, 10-throttle valve, 11-EGR valve, 12-exhaust flowmeter, 13-inlet line, 14-EGR return line, 15-EGR inlet line, 16-EGR outlet line.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As shown in fig. 1, an EGR system with intelligent thermal management according to a preferred embodiment of the present invention mainly includes a cylinder block 1, an EGR intake pipe 2, an intelligent valve 3, an EGR cooler 4, an exhaust pipe 5, a catalyst 6, a supercharger 7, an air cleaner 8, an intercooler 9, a throttle valve 10, an EGR valve 11, an exhaust gas flow meter 12, an intake pipe 13, an EGR return pipe 14, an EGR intake pipe 15, and an EGR outlet pipe 16.
Referring to fig. 1, in some embodiments, an EGR water intake line 2 is provided between an EGR cooler 4 and a cylinder block 1. The intelligent valve 3 is arranged on the EGR water intake pipe 2. One end of the intake pipe 13 communicates with the intake end of the cylinder block 1. One end of the exhaust pipe 5 communicates with the exhaust end of the cylinder block 1. The front end of the supercharger 7 is communicated with the other end of the air inlet pipeline 13, and the rear end is communicated with the other end of the exhaust pipeline 5. The EGR gas intake line 15 communicates between the exhaust line 5 and the gas intake end of the EGR cooler 4; the EGR outlet line 16 communicates between the inlet line 13 and the outlet end of the EGR cooler 4. The EGR valve 11 is provided on the EGR gas pipe 16. An exhaust gas flow meter 12 is arranged on the EGR outlet line 16 between the EGR valve 11 and the outlet end of the EGR cooler 4. The EGR return line 14 communicates between the water intake end of the cylinder block 1 and the water outlet end of the EGR cooler 4.
In some embodiments, during the cold engine start phase, the intelligent valve 3 is closed and the high temperature exhaust gas heats the EGR system via the exhaust line 5, the EGR inlet line 15, the EGR cooler 4 and the EGR outlet line 16. And the waste heat of the exhaust gas is utilized to heat the EGR system pipeline, so that ice is removed, and faults of parts such as the EGR valve 11 and the like caused by ice and the like in a shutdown stage are reduced.
In some embodiments, during the low-temperature operation phase of the engine (5 minutes of engine start), the EGR valve 11 is opened, and the intelligent valve 3 has a smaller opening, high-temperature exhaust gas is introduced into the cylinder block 1 through the exhaust pipeline 5, the EGR air inlet pipeline 15, the EGR cooler 4, the EGR air outlet pipeline 16, the EGR valve 11 and the air inlet pipeline 13, so that atomization and mixing of oil gas are improved, and emission of CO and HC is reduced. .
In some embodiments, under the condition of low load operation of the engine, the opening degree of the intelligent valve 3 is controlled by monitoring the exhaust gas flow of the exhaust gas flowmeter 12, so that the temperature of the air outlet end of the EGR cooler 4 can be controlled to be above 120 ℃, and the problems of coking and the like caused by the low temperature of the EGR valve 11, the flowmeter and the like are prevented, so that the risks of adhesion, incapacity of normal operation and the like of the system such as the EGR valve 11 and the like are caused.
Referring again to FIG. 1, in some embodiments, the EGR system with intelligent thermal management further includes an intercooler 9, a throttle valve 10, an air cleaner 8, and a catalyst 6. The intercooler 9 is arranged on the inlet line 13 between the front end of the supercharger 7 and the EGR outlet line 16, and serves to cool the supercharged air. A throttle valve 10 is provided on the intake line 13 between the intercooler 9 and the EGR outlet line 16, which serves to control the amount of air entering the cylinders. An air cleaner 8 is provided upstream of the front end of the supercharger 7, and functions to filter out impurities, dust, moisture, and the like in the air. The catalyst 6 is arranged downstream of the rear end of the supercharger 7 and serves to further treat the exhaust gases and reduce the emission pollution.
In summary, the EGR system with intelligent thermal management of the present invention has the following advantages: by installing the intelligent valve at the inlet position of the water inlet pipe of the EGR cooler, the opening of the intelligent valve is controlled to form intelligent control with the outlet air temperature of the EGR cooler, the water temperature of the engine and the working condition of the engine, the outlet air temperature of the EGR cooler is improved, and the phenomena of icing and coking are prevented. In the running stage of the engine of the cooler, the opening of an intelligent valve at the inlet of the EGR cooler is reduced, the cooling-free EGR is realized, and the combustion temperature in the cylinder is improved by introducing high-temperature EGR waste gas into the cylinder, so that the evaporation and mixing of oil gas are improved, and the CO and HC emission is improved.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (6)
1. An EGR system with intelligent thermal management, comprising:
a cylinder block;
an EGR cooler;
an EGR water intake pipe provided between the EGR cooler and the cylinder block;
an intelligent valve arranged on the EGR water inlet pipeline;
one end of the air inlet pipeline is communicated with the air inlet end of the cylinder body;
an exhaust pipe, one end of which is communicated with the exhaust end of the cylinder block;
the front end of the supercharger is communicated with the other end of the air inlet pipeline, and the rear end of the supercharger is communicated with the other end of the exhaust pipeline;
an EGR intake line communicating between the exhaust line and an intake end of the EGR cooler; and
an EGR outlet pipe connected between the inlet pipe and an outlet end of the EGR cooler;
wherein during an engine cold start phase, the intelligent valve is closed, and high-temperature exhaust gas heats the EGR system through the exhaust pipeline, the EGR inlet pipeline, the EGR cooler and the EGR outlet pipeline;
wherein the EGR system further comprises an EGR valve disposed on the EGR outlet conduit.
2. The EGR system with intelligent thermal management according to claim 1, wherein said intelligent valve is partially open, said EGR valve is open, and high temperature exhaust gas enters said cylinder block via said exhaust line, said EGR intake line, said EGR cooler, said EGR outlet line, said EGR valve, and said intake line during low temperature engine operating phases.
3. The EGR system with intelligent thermal management of claim 1, further comprising an exhaust gas flow meter disposed on the EGR outlet line between the EGR valve and the outlet end of the EGR cooler.
4. An EGR system with intelligent thermal management as defined in claim 3 wherein the temperature at the outlet end of said EGR cooler can be controlled above 120 ℃ by monitoring the exhaust gas flow rate of said exhaust gas flow meter to control the degree of opening of said intelligent valve during low engine load operation.
5. The EGR system with intelligent thermal management of claim 1, further comprising:
an intercooler disposed on the intake pipe and between the front end of the supercharger and the EGR outlet pipe; and
and a throttle valve is arranged on the air inlet pipeline and is positioned between the intercooler and the EGR air outlet pipeline.
6. The EGR system with intelligent thermal management of claim 1, further comprising:
an air cleaner disposed upstream of a front end of the supercharger; and
a catalyst disposed downstream of a rear end of the supercharger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110294670.9A CN112963271B (en) | 2021-03-19 | 2021-03-19 | EGR system with intelligent thermal management |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110294670.9A CN112963271B (en) | 2021-03-19 | 2021-03-19 | EGR system with intelligent thermal management |
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| Publication Number | Publication Date |
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| CN112963271A CN112963271A (en) | 2021-06-15 |
| CN112963271B true CN112963271B (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110294670.9A Active CN112963271B (en) | 2021-03-19 | 2021-03-19 | EGR system with intelligent thermal management |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010020265A1 (en) * | 2008-08-20 | 2010-02-25 | Fev Motorentechnik Gmbh | Flexible use of exhaust gas energy in operating an internal combustion engine |
| CN203717140U (en) * | 2014-02-14 | 2014-07-16 | 吉林大学 | Load regulating device for petrol engine |
| CN204877678U (en) * | 2015-06-29 | 2015-12-16 | 潍柴动力股份有限公司 | Cleaning device of EGR cooler |
| CN105443274A (en) * | 2015-12-07 | 2016-03-30 | 潍柴动力股份有限公司 | Multi-level cooling EGR cooling system |
| DE102015108223A1 (en) * | 2015-05-26 | 2016-12-01 | Tenneco Gmbh | EGR system with particle filter and wastegate |
| CN108397314A (en) * | 2018-02-07 | 2018-08-14 | 贵阳吉利发动机有限公司 | Cooling system for recycled exhaust gas, egr system and cooling system for recycled exhaust gas control method |
| CN109653906A (en) * | 2019-01-28 | 2019-04-19 | 东风汽车集团有限公司 | Gasoline engine with supercharger exhaust gas recirculation system device |
| CN214698109U (en) * | 2021-03-19 | 2021-11-12 | 广西玉柴机器股份有限公司 | EGR system with intelligent thermal management |
-
2021
- 2021-03-19 CN CN202110294670.9A patent/CN112963271B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010020265A1 (en) * | 2008-08-20 | 2010-02-25 | Fev Motorentechnik Gmbh | Flexible use of exhaust gas energy in operating an internal combustion engine |
| CN203717140U (en) * | 2014-02-14 | 2014-07-16 | 吉林大学 | Load regulating device for petrol engine |
| DE102015108223A1 (en) * | 2015-05-26 | 2016-12-01 | Tenneco Gmbh | EGR system with particle filter and wastegate |
| CN204877678U (en) * | 2015-06-29 | 2015-12-16 | 潍柴动力股份有限公司 | Cleaning device of EGR cooler |
| CN105443274A (en) * | 2015-12-07 | 2016-03-30 | 潍柴动力股份有限公司 | Multi-level cooling EGR cooling system |
| CN108397314A (en) * | 2018-02-07 | 2018-08-14 | 贵阳吉利发动机有限公司 | Cooling system for recycled exhaust gas, egr system and cooling system for recycled exhaust gas control method |
| CN109653906A (en) * | 2019-01-28 | 2019-04-19 | 东风汽车集团有限公司 | Gasoline engine with supercharger exhaust gas recirculation system device |
| CN214698109U (en) * | 2021-03-19 | 2021-11-12 | 广西玉柴机器股份有限公司 | EGR system with intelligent thermal management |
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| Publication number | Publication date |
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| CN112963271A (en) | 2021-06-15 |
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