CN111322178A - EGR mixer heating system - Google Patents
EGR mixer heating system Download PDFInfo
- Publication number
- CN111322178A CN111322178A CN202010243876.4A CN202010243876A CN111322178A CN 111322178 A CN111322178 A CN 111322178A CN 202010243876 A CN202010243876 A CN 202010243876A CN 111322178 A CN111322178 A CN 111322178A
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- CN
- China
- Prior art keywords
- egr mixer
- egr
- controller
- heating system
- heating device
- 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.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000009413 insulation Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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
- F02M26/17—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
- F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings 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
- F02M26/17—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
- F02M26/18—Thermal insulation or heat protection
-
- 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
- F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention discloses an EGR mixer heating system, relates to an EGR system and mainly solves the technical problem of icing of an EGR mixer. According to the invention, the EGR mixer is heated by introducing the circulating heat-conducting liquid into the heating device, so that the potential safety hazard that the EGR mixer cannot be started or flameout due to icing can be effectively prevented, the reliability of the EGR system is improved, and the driving safety of the whole vehicle is improved.
Description
Technical Field
The present invention relates to EGR systems, and more particularly, it relates to an EGR mixer heating system.
Background
In order to meet the national six-emission regulations, the internal combustion engine adopts a technical route of equivalent combustion, but because the combustion temperature in a cylinder is higher in the technical route, EGR (exhaust gas recirculation) gas drop must be introducedThe combustion temperature in the cylinder is low, and the reliability of the engine is improved. The mainstream internal combustion engine control system adopting the EGR technology for the current six gas engines is shown in FIG. 1. A portion of the exhaust gas from combustion in engine cylinder a passes through EGR cooler B and EGR valve C and enters mixer D where it is mixed with fresh air. EGR gas composition consisting mainly of CO2And H2O composition wherein H2O is present mainly in gaseous form.
Since the EGR valve is physically constructed as a poppet valve, the valve plate and valve seat cannot be completely sealed, and there is a slight leakage in the closed state. In cold regions, when there is a slight leak in the EGR valve, the gas enters the EGR mixer to mix with fresh air, because the temperature of the air is low, and the moisture in the EGR condenses into water upon condensation.
Under the long-time small-load working condition, especially under the long-time idling working condition, such as under the cold weather condition, a driver usually uses the original idling working condition to start hot air to warm when waiting for loading and unloading, if the EGR valve has slight leakage, under the long-time condition, because the air flow in the EGR valve is small, the condensed water can not be brought into the cylinder, and the condensed water is attached to the EGR mixer to form ice. Along with the accumulation of the icing amount, the EGR mixer can be blocked to cause that air can not enter a cylinder through the mixer to be combusted, so that the power of an engine is insufficient or the engine is out of order or even cannot be started, and the driving safety is influenced.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned disadvantages of the prior art, and an object of the present invention is to provide an EGR mixer heating system capable of effectively preventing an EGR mixer from freezing.
The technical scheme of the invention is as follows: the utility model provides a EGR blender heating system, includes the controller, with the heating device of EGR blender parcel, be equipped with the heat conduction chamber that is used for holding heat conduction liquid in the heating device, heating device is connected with heat conduction liquid supply mechanism through feed liquor pipe and drain pipe, be equipped with electric connection on the feed liquor pipe the first control valve of controller.
As a further improvement, a first temperature sensor electrically connected with the controller is arranged at the outlet of the EGR mixer.
Furthermore, a heat conduction fin is arranged in the heat conduction cavity of the heating device.
Further, a heat insulation layer is arranged on the periphery of the heating device.
Further, the heat-conducting liquid supply mechanism is an engine circulating water mechanism.
Further, the controller is an engine ECU.
Further, the heat-conducting liquid supply mechanism comprises a heat exchanger connected with the liquid inlet pipe and the liquid outlet pipe, the air inlet end of the heat exchanger is connected with an engine exhaust main pipe through an air inlet pipe, the air outlet end of the heat exchanger is connected with an exhaust pipe through an air outlet pipe, and a water pump electrically connected with the controller is arranged on the liquid inlet pipe.
Furthermore, the air inlet pipe is provided with a second control valve which is electrically connected with the controller.
Further, the heat exchanger is provided with a second temperature sensor electrically connected with the controller.
Advantageous effects
Compared with the prior art, the invention has the advantages that: the EGR mixer can be heated by introducing the circulating heat-conducting liquid into the heating device, so that the potential safety hazard that the EGR mixer cannot be started or is shut down due to icing can be effectively prevented, the reliability of the EGR system is improved, and the driving safety of the whole vehicle is improved.
Drawings
FIG. 1 is a schematic diagram of a conventional structure;
FIG. 2 is a schematic structural view of example 1 of the present invention;
FIG. 3 is a schematic structural diagram of embodiment 2 of the present invention.
Wherein: 1-controller, 2-EGR mixer, 3-heating device, 4-liquid inlet pipe, 5-liquid outlet pipe, 6-heat conducting liquid supply mechanism, 7-first control valve, 8-first temperature sensor, 9-heat exchanger, 10-air inlet pipe, 11-engine exhaust manifold, 12-air outlet pipe, 13-exhaust pipe, 14-water pump, 15-second control valve and 16-second temperature sensor.
Detailed Description
The invention will be further described with reference to specific embodiments shown in the drawings.
Example 1
Referring to fig. 2, an EGR mixer heating system includes controller 1, heating device 3 with 2 parcels of EGR mixer, is equipped with the heat conduction chamber that is used for holding heat conduction liquid in heating device 3, and heating device 3 is connected with heat conduction liquid supply mechanism 6 through feed liquor pipe 4 and drain pipe 5, is equipped with the first control valve 7 of electric connection controller 1 on the feed liquor pipe 4. The heating device 3 is heated by circulating heat-conducting liquid introduced into the heat-conducting cavity of the heating device 3 through the heat-conducting liquid supply mechanism 6, so that the EGR mixer 2 can be heated after the heating device 3 is heated, and the EGR mixer 2 is prevented from freezing.
And a first temperature sensor 8 electrically connected with the controller 1 is arranged at the outlet of the EGR mixer 2 and used for acquiring the temperature of the mixture at the outlet of the EGR mixer 2. The heat conduction cavity of the heating device 3 is internally provided with heat conduction fins, so that the absorption of the heating device 3 on heat in heat conduction liquid can be improved, and the temperature rise of the heating device 3 is accelerated. The periphery of the heating device 3 is provided with a heat insulation layer, so that the heat loss of the heating device 3 can be reduced, and the effect of protecting the heating device 3 can be achieved.
In the present embodiment, the heat conductive liquid supply mechanism 6 is an engine circulating water mechanism, and the controller 1 is an engine ECU.
The heating system described in this embodiment can at least realize the following heating methods:
the engine ECU acquires the temperature of the mixed gas at the outlet of the EGR mixer 2 in real time through a first temperature sensor 8;
when the temperature of the mixed gas is lower than a first calibration value, the engine ECU controls the first control valve 7 to be opened, so that the circulating water in the circulating water mechanism of the engine is introduced into the heat conducting cavity of the heating device 3 and circulates back to the circulating water mechanism of the engine to achieve the effect of heating the EGR mixer 2;
when the mixture temperature is higher than the second calibrated value, the engine ECU controls the first control valve 7 to close, stopping heating the EGR mixer 2.
In this embodiment, the first calibration value is 0-5 ℃ and the second calibration value is 20-25 ℃.
Example 2
Referring to fig. 3, unlike embodiment 1, the heat-conducting liquid supply mechanism 6 in this embodiment includes a heat exchanger 9 connected to a liquid inlet pipe 4 and a liquid outlet pipe 5, an air inlet end of the heat exchanger 9 is connected to an engine exhaust manifold 11 through an air inlet pipe 10, an air outlet end of the heat exchanger 9 is connected to an exhaust pipe 13 through an air outlet pipe 12, and the liquid inlet pipe 4 is provided with a water pump 14 electrically connected to the controller 1. The air inlet pipe 10 is provided with a second control valve 15 which is electrically connected with the controller 1. The heat exchanger 9 is provided with a second temperature sensor 16 electrically connected to the controller 1 for obtaining the temperature of the liquid in the heat exchanger 9. The controller 1 may be an engine ECU or an external independent controller.
The heating system described in this embodiment can at least realize the following heating methods:
the controller 1 obtains the temperature of the liquid in the heat exchanger 9 in real time through the second temperature sensor 16, and if the temperature of the liquid is higher than a third calibration value, the controller 1 controls the second control valve 15 to close, stops the tail gas of the engine from entering the heat exchanger 9, and prevents potential safety hazards caused by overhigh temperature of the liquid in the heat exchanger 9; otherwise, the controller 1 controls the second control valve 15 to open, so that the tail gas of the engine enters the heat exchanger 9, and the liquid in the heat exchanger 9 is maintained at a higher temperature;
the controller 1 acquires the temperature of the mixed gas at the outlet of the EGR mixer 2 in real time through the first temperature sensor 8;
when the temperature of the mixed gas is lower than a first calibration value, the controller 1 controls the first control valve 7 and the water pump 14 to be opened, so that the circulating water in the heat exchanger 9 is introduced into the heat conducting cavity of the heating device 3 and circulates back to the heat exchanger 9 to achieve the effect of heating the EGR mixer 2;
when the temperature of the mixture is higher than the second calibration value, the heat exchanger 9 controls the first control valve 7 and the water pump 14 to be closed, and the EGR mixer 2 stops heating.
In this embodiment, the first calibration value is 0-5 ℃, the second calibration value is 20-25 ℃, and the third calibration value is 60-80 ℃.
The EGR mixer can be heated by introducing the circulating heat-conducting liquid into the heating device, so that the potential safety hazard that the EGR mixer cannot be started or is shut down due to icing can be effectively prevented, the reliability of the EGR system is improved, and the driving safety of the whole vehicle is improved.
The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (9)
1. The EGR mixer heating system is characterized by comprising a controller (1) and a heating device (3) wrapping an EGR mixer (2), wherein a heat conduction cavity used for containing heat conduction liquid is arranged in the heating device (3), the heating device (3) is connected with a heat conduction liquid supply mechanism (6) through a liquid inlet pipe (4) and a liquid outlet pipe (5), and a first control valve (7) electrically connected with the controller (1) is arranged on the liquid inlet pipe (4).
2. An EGR mixer heating system according to claim 1, characterized in that the outlet of the EGR mixer (2) is provided with a first temperature sensor (8) electrically connected to the controller (1).
3. An EGR mixer heating system according to claim 1, characterized in that heat conducting fins are provided in the heat conducting cavity of the heating device (3).
4. An EGR mixer heating system according to claim 1, characterized in that the periphery of the heating device (3) is provided with a thermal insulation layer.
5. An EGR mixer heating system according to any of claims 1-4, wherein said heat conducting liquid supply means (6) is engine circulating water means.
6. An EGR mixer heating system according to claim 5, characterized in that the controller (1) is an engine ECU.
7. An EGR mixer heating system according to any of claims 1-4, wherein said heat conducting liquid supply means (6) comprises a heat exchanger (9) connected to said inlet pipe (4) and outlet pipe (5), the inlet end of said heat exchanger (9) is connected to the engine exhaust manifold (11) through an inlet pipe (10), the outlet end of said heat exchanger (9) is connected to an exhaust pipe (13) through an outlet pipe (12), and a water pump (14) electrically connected to said controller (1) is provided on said inlet pipe (4).
8. An EGR mixer heating system according to claim 7, characterized in that said intake pipe (10) is provided with a second control valve (15) electrically connected to said controller (1).
9. An EGR mixer heating system according to claim 8, wherein the heat exchanger (9) is provided with a second temperature sensor (16) electrically connected to the controller (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010243876.4A CN111322178A (en) | 2020-03-31 | 2020-03-31 | EGR mixer heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010243876.4A CN111322178A (en) | 2020-03-31 | 2020-03-31 | EGR mixer heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111322178A true CN111322178A (en) | 2020-06-23 |
Family
ID=71167793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010243876.4A Pending CN111322178A (en) | 2020-03-31 | 2020-03-31 | EGR mixer heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111322178A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927657A (en) * | 2020-08-11 | 2020-11-13 | 一汽解放汽车有限公司 | Engine air inlet system, structure design method and low-temperature exhaust gas circulation control method |
| CN112065613A (en) * | 2020-08-12 | 2020-12-11 | 潍柴动力股份有限公司 | Bath heat mixer and heating method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6564545B1 (en) * | 2002-01-31 | 2003-05-20 | Visteon Global Technologies, Inc. | Superintegration of three way catalyst and heat exchanger for HCCI engine intake air temperature control |
| JP2016017407A (en) * | 2014-07-04 | 2016-02-01 | 愛三工業株式会社 | Exhaust mixing device |
| CN211819733U (en) * | 2020-03-31 | 2020-10-30 | 广西玉柴机器股份有限公司 | EGR mixer heating system |
-
2020
- 2020-03-31 CN CN202010243876.4A patent/CN111322178A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6564545B1 (en) * | 2002-01-31 | 2003-05-20 | Visteon Global Technologies, Inc. | Superintegration of three way catalyst and heat exchanger for HCCI engine intake air temperature control |
| JP2016017407A (en) * | 2014-07-04 | 2016-02-01 | 愛三工業株式会社 | Exhaust mixing device |
| CN211819733U (en) * | 2020-03-31 | 2020-10-30 | 广西玉柴机器股份有限公司 | EGR mixer heating system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927657A (en) * | 2020-08-11 | 2020-11-13 | 一汽解放汽车有限公司 | Engine air inlet system, structure design method and low-temperature exhaust gas circulation control method |
| CN112065613A (en) * | 2020-08-12 | 2020-12-11 | 潍柴动力股份有限公司 | Bath heat mixer and heating method thereof |
| WO2022032974A1 (en) * | 2020-08-12 | 2022-02-17 | 潍柴动力股份有限公司 | Bath heating mixer and heating method thereof |
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