CN111173656A - EGR valve with heating water cavity and heating method - Google Patents
EGR valve with heating water cavity and heating method Download PDFInfo
- Publication number
- CN111173656A CN111173656A CN202010158849.7A CN202010158849A CN111173656A CN 111173656 A CN111173656 A CN 111173656A CN 202010158849 A CN202010158849 A CN 202010158849A CN 111173656 A CN111173656 A CN 111173656A
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- China
- Prior art keywords
- egr valve
- heating water
- valve
- heating
- water cavity
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- 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.)
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- 239000008236 heating water Substances 0.000 title claims abstract description 42
- 238000010438 heat treatment Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000000498 cooling water Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 238000007789 sealing Methods 0.000 claims description 10
- 239000002912 waste gas Substances 0.000 description 13
- 239000007789 gas Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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
- F02M26/65—Constructional details of EGR valves
- F02M26/72—Housings
- F02M26/73—Housings with means for heating or cooling the EGR valve
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention discloses an EGR valve with a heating water cavity, relates to an EGR valve and mainly solves the technical problem that the existing EGR valve is easy to freeze in a severe cold area. The invention also discloses a heating method of the EGR valve with the heating water cavity. The EGR valve can effectively solve the problem of icing of the EGR valve in severe cold areas by introducing cooling water of the engine into the heating water cavity and enabling the cooling water to circulate between the heating water cavity and the engine to heat the valve body.
Description
Technical Field
The present invention relates to an EGR valve, and more particularly, to an EGR valve with a heating water chamber and a heating method.
Background
The EGR (exhaust gas recirculation) technology is one of the main technologies developed for engines, that is, a small part of exhaust gas generated by an engine is sent back to a cylinder to participate in combustion, and the main component CO2 in the exhaust gas can slow down the combustion speed in the cylinder, reduce the temperature in the cylinder, improve the reliability of the engine and reduce the generation of nitrogen oxides. In addition, on the ignition engine, the detonation boundary can be widened, and the specific gas/oil consumption can be reduced by properly increasing the ignition advance angle, so that the economy is improved.
The EGR valve is an important main component of an EGR system, the bridge type EGR valve and the CAN valve are mainly arranged on the market at present, the bridge type EGR valve and the CAN valve play a critical role in precisely controlling the EGR rate, the poor influence is generated on an engine when the EGR rate is too high or too low, the service life of the engine CAN be shortened due to the fact that the temperature in an engine cylinder and the exhaust temperature are high when the EGR rate is too low, and the engine is easy to catch fire and runs badly when the EGR rate is too high.
Because the EGR waste gas contains water vapor, when the engine runs under a small-load working condition with an EGR rate in a severe cold area (the temperature is less than or equal to 0 ℃), because the flow of the waste gas is small, the heat is less, the heat dissipation is quick, and the moisture in the waste gas is easy to freeze with an EGR valve, so that the EGR valve is not controlled by a command; when the engine stops working, the residual moisture on and around the EGR valve and the valve are frozen, the engine is operated again, and the EGR valve is not controlled.
Disclosure of Invention
The technical problem to be solved by the present invention is to solve the above-mentioned defects in the prior art, and an object of the present invention is to provide an EGR valve with a heating water chamber, which can effectively solve the problem of icing.
The invention also aims to provide a heating method of the EGR valve with the heating water cavity, which can effectively solve the icing problem.
In order to achieve the first purpose, the invention provides an EGR valve with a heating water cavity, which comprises a valve body and a shell wrapping the valve body, wherein a heating water cavity is formed in a gap between the valve body and the shell, and a water inlet and a water outlet which are communicated with the heating water cavity are formed in the shell.
As a further improvement, the waste gas inlet and the waste gas outlet of the valve body respectively extend to the outer side of the shell.
Furthermore, the joints of the shell and the waste gas inlet and the waste gas outlet are respectively provided with a sealing element.
Furthermore, the electric control unit of the valve body is positioned outside the shell, and one end of the valve body penetrates through the shell and is connected with the electric control unit.
Further, a sealing ring is arranged between the valve and the shell.
Further, the water inlet and the water outlet are respectively positioned at two ends of the shell.
Further, the water inlet and the water outlet are respectively positioned on opposite sides of the shell.
In order to achieve the second object, the present invention provides a method for heating an EGR valve with a heating water chamber, wherein cooling water of an engine is introduced into the heating water chamber of the EGR valve, and the cooling water is circulated between the heating water chamber and the engine to heat a valve body of the EGR valve.
Advantageous effects
Compared with the prior art, the invention has the advantages that: according to the invention, the shell for wrapping the valve body is arranged, the gap between the valve body and the shell forms the heating water cavity, and the shell is provided with the water inlet and the water outlet which are communicated with the heating water cavity; cooling water of the engine is introduced into the heating water cavity, and the cooling water circulates between the heating water cavity and the engine to heat the valve body, so that the temperatures of the EGR valve and the valve seat are always above the freezing point, and the EGR valve is not frozen to cause clamping stagnation even if the engine runs under the load with a small EGR rate; meanwhile, after the engine is stopped, the residual water vapor in the EGR valve can be continuously heated by the cooling water retained in the heating water cavity in a short time, the risk of ice formation of the EGR valve and surrounding water is reduced, and the problem of next cold machine starting jamming is improved to a certain extent.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein: 1-valve body, 2-shell, 3-heating water cavity, 4-water inlet, 5-water outlet, 6-waste gas inlet, 7-waste gas outlet, 8-electric control unit and 9-valve.
Detailed Description
The invention will be further described with reference to specific embodiments shown in the drawings.
Referring to fig. 1, the EGR valve with the heating water cavity comprises a valve body 1 and a housing 2 wrapping the valve body 1, a heating water cavity 3 is formed in a gap between the valve body 1 and the housing 2, and a water inlet 4 and a water outlet 5 which are communicated with the heating water cavity 3 are arranged on the housing 2. Circulating hot water can be introduced into the heating water cavity 3 through the water inlet 4 and the water outlet 5 to heat the valve body 1, so that the temperature of the EGR valve and the valve seat is always above the freezing point, and the EGR valve is not frozen to cause clamping stagnation even if the engine runs under the load with small EGR rate; meanwhile, after the engine is stopped, the residual water vapor in the EGR valve can be continuously heated by the hot water retained in the hot water cavity 3 in a short time, the risk of ice formation of the EGR valve and surrounding water is reduced, and the problem of next cold machine starting jamming is improved to a certain extent. The source of the circulating hot water is not particularly limited in the present invention. Be equipped with the insulating layer on casing 2, can effectively reduce casing 2's heat dissipation, after the engine stops, can further prolong the hot water that heating water cavity 3 is detained to the hot time of steam, further improved the problem of cold machine start jamming next time. The fins are arranged on the periphery of the valve body 1, so that the contact area of the valve body 1 and hot water can be increased, the heat absorption rate of the valve body 1 to the hot water is improved, the heating speed of the valve body 1 is increased, and the icing problem of the EGR valve is solved.
The waste gas inlet 6 and the waste gas outlet 7 of the valve body 1 extend to the outer side of the shell 2 respectively, sealing parts are arranged at the joints of the shell 2 and the waste gas inlet 6 and the waste gas outlet 7 respectively, the sealing parts can be sealing gaskets or sealing filler, the sealing performance between the shell 2 and the valve body 1 can be improved, and hot water leakage is prevented.
The electric control unit 8 of the valve body 1 is positioned on the outer side of the shell 2, the electric control unit 8 is an electromagnetic coil of the valve body 1 and is used for controlling the opening and closing of the valve 9, one end of the valve 9 of the valve body 1 penetrates through the shell 2 and is connected with the electric control unit 8, and a sealing ring is arranged between the valve 9 and the shell 2 to prevent hot water from leaking. The electric control unit 8 is arranged on the outer side of the shell 2, so that the influence of high temperature of hot water on the work of the electric control unit 8 can be reduced, meanwhile, the electric control unit 8 can be non-waterproof, and the cost can be reduced.
The water inlet 4 and the water outlet 5 are respectively positioned at two ends of the shell 2, and the water inlet 4 and the water outlet 5 are respectively positioned at opposite sides of the shell 2, so that hot water can uniformly flow through all corners of the heating water cavity 3, the valve body 1 is uniformly heated, and the problem of icing of the EGR valve is better solved.
A heating method of an EGR valve with a heating water cavity is characterized in that cooling water of an engine is led into the heating water cavity 3 of the EGR valve, and the cooling water is circulated between the heating water cavity 3 and the engine to heat a valve body 1 of the EGR valve, so that the heat energy of the cooling water can be fully utilized, and additional energy consumption is not needed to produce hot water.
The invention can effectively solve the problem of EGR valve icing in severe cold areas, and has good running stability and good economical efficiency of the engine.
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 (8)
1. The EGR valve with the heating water cavity comprises a valve body (1) and is characterized by further comprising a shell (2) wrapped by the valve body (1), the heating water cavity (3) is formed in a gap between the valve body (1) and the shell (2), and a water inlet (4) and a water outlet (5) communicated with the heating water cavity (3) are formed in the shell (2).
2. The EGR valve with heating water chamber according to claim 1, wherein the exhaust gas inlet (6) and the exhaust gas outlet (7) of the valve body (1) extend to the outside of the housing (2), respectively.
3. The EGR valve with the heating water cavity is characterized in that the joints of the shell (2) and the exhaust gas inlet (6) and the exhaust gas outlet (7) are provided with sealing parts.
4. An EGR valve with heating water cavity according to claim 1, characterized in that the electric control unit (8) of the valve body (1) is located outside the housing (2), and one end of the valve (9) of the valve body (1) passes through the housing (2) and is connected with the electric control unit (8).
5. EGR valve with heating water chamber according to claim 4 characterized in that a sealing ring is provided between the valve (9) and the housing (2).
6. The EGR valve with the heating water cavity is characterized in that the water inlet (4) and the water outlet (5) are respectively positioned at two ends of the shell (2).
7. The EGR valve with the heating water cavity is characterized in that the water inlet (4) and the water outlet (5) are respectively positioned at the opposite sides of the shell (2).
8. A method of heating an EGR valve with a heating water chamber, characterized in that cooling water of an engine is introduced into the heating water chamber (3) of the EGR valve, and the cooling water is circulated between the heating water chamber (3) and the engine to heat a valve body (1) of the EGR valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010158849.7A CN111173656A (en) | 2020-03-09 | 2020-03-09 | EGR valve with heating water cavity and heating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010158849.7A CN111173656A (en) | 2020-03-09 | 2020-03-09 | EGR valve with heating water cavity and heating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111173656A true CN111173656A (en) | 2020-05-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010158849.7A Pending CN111173656A (en) | 2020-03-09 | 2020-03-09 | EGR valve with heating water cavity and heating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111173656A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523904A (en) * | 2020-11-30 | 2021-03-19 | 中国重型汽车集团有限公司 | Exhaust gas recirculation pipeline with heating water cavity |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103797239A (en) * | 2011-09-05 | 2014-05-14 | 日野自动车株式会社 | Anti-freezing device for egr device |
| US20170074216A1 (en) * | 2015-09-11 | 2017-03-16 | Komatsu Ltd. | Exhaust gas recirculation valve, thawing system of exhaust gas recirculation valve, and engine |
| US20180066611A1 (en) * | 2015-05-09 | 2018-03-08 | Motorenfabrik Hatz Gmbh & Co. Kg | Device and method for exhaust gas recirculation |
| CN108884765A (en) * | 2016-04-12 | 2018-11-23 | 日立汽车系统株式会社 | Valve body, electronically controlled throttle valve main body, motor-driven throttle valve main body and valving |
| CN208236522U (en) * | 2018-01-02 | 2018-12-14 | 宁波吉利罗佑发动机零部件有限公司 | Engine aspirating system and automobile |
| CN110657050A (en) * | 2018-06-28 | 2020-01-07 | 福特全球技术公司 | Low-pressure exhaust gas return system, motor vehicle and method for temperature control of an EGR cooler and/or EGR valve |
| CN211819739U (en) * | 2020-03-09 | 2020-10-30 | 广西玉柴机器股份有限公司 | EGR valve with heating water cavity |
-
2020
- 2020-03-09 CN CN202010158849.7A patent/CN111173656A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103797239A (en) * | 2011-09-05 | 2014-05-14 | 日野自动车株式会社 | Anti-freezing device for egr device |
| US20180066611A1 (en) * | 2015-05-09 | 2018-03-08 | Motorenfabrik Hatz Gmbh & Co. Kg | Device and method for exhaust gas recirculation |
| US20170074216A1 (en) * | 2015-09-11 | 2017-03-16 | Komatsu Ltd. | Exhaust gas recirculation valve, thawing system of exhaust gas recirculation valve, and engine |
| CN108884765A (en) * | 2016-04-12 | 2018-11-23 | 日立汽车系统株式会社 | Valve body, electronically controlled throttle valve main body, motor-driven throttle valve main body and valving |
| CN208236522U (en) * | 2018-01-02 | 2018-12-14 | 宁波吉利罗佑发动机零部件有限公司 | Engine aspirating system and automobile |
| CN110657050A (en) * | 2018-06-28 | 2020-01-07 | 福特全球技术公司 | Low-pressure exhaust gas return system, motor vehicle and method for temperature control of an EGR cooler and/or EGR valve |
| CN211819739U (en) * | 2020-03-09 | 2020-10-30 | 广西玉柴机器股份有限公司 | EGR valve with heating water cavity |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523904A (en) * | 2020-11-30 | 2021-03-19 | 中国重型汽车集团有限公司 | Exhaust gas recirculation pipeline with heating water cavity |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200519 |
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| RJ01 | Rejection of invention patent application after publication |