CN102619649A - EGR (exhaust gas recirculation) cooler for engine - Google Patents
EGR (exhaust gas recirculation) cooler for engine Download PDFInfo
- Publication number
- CN102619649A CN102619649A CN2012100831769A CN201210083176A CN102619649A CN 102619649 A CN102619649 A CN 102619649A CN 2012100831769 A CN2012100831769 A CN 2012100831769A CN 201210083176 A CN201210083176 A CN 201210083176A CN 102619649 A CN102619649 A CN 102619649A
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- China
- Prior art keywords
- exhaust gas
- cooler
- valve
- recycled exhaust
- egr valve
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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
Abstract
The invention provides an EGR (exhaust gas recirculation) cooler for an engine, which comprises an EGR cooler body, an EGR valve and an air inlet/outlet chamber, wherein the EGR valve and the air inlet/outlet chamber are arranged at two ends of the EGR cooler body respectively; the exhaust gas cooling channel in the EGR cooler body adopts a U-shaped structure; and the EGR valve is arranged at a corner at the bottom of the U-shaped exhaust gas cooling channel. As the EGR valve is arranged in the middle of the exhaust gas cooling channel, that is, at the corner at the bottom of the U-shaped structure, when exhaust gas flows through the EGR cooler, the operating temperature of the EGR valve is controlled in a relatively reasonable range.
Description
Technical field
The invention belongs to the heat exchanger technical field, relate to the arrangement and the position of a kind of engine exhaust recycle cooler and EGR control valve, specifically a kind of cooler for recycled exhaust gas that is used for motor.
Background technique
EGR Technology is that motor is realized one of main technological route that state discharges more than 4.Exhaust gas recirculation need be cooled to uniform temperature before getting into engine cylinder, and (is called for short: the EGR valve) according to the command control EGR gas flow of Engine ECU by EGR control valve.Traditional EGR valve is arranged in cooler for recycled exhaust gas (to be called for short: inlet end cooler for recycled exhaust gas) or outlet side.When the EGR valve is arranged in the cooler for recycled exhaust gas inlet end,, reduced the working life of EGR valve, need on valve seat, design water cooling labyrinth the cooling of lowering the temperature of EGR valve because high-temp waste gas impacts the electronic component of EGR valve easily.When the EGR valve is arranged in the cooler for recycled exhaust gas outlet side; Owing to can produce corrosive action to the EGR valve after the low temperature waste gas condensation; Because low temperature waste gas produces serious carbon distribution at the valve and the valve opening place of EGR valve easily, influence the unlatching and closure of valve, thereby cause EGR valve cisco unity malfunction simultaneously.Therefore, the arrangement of these two kinds of EGR valves respectively has pluses and minuses, all can not avoid waste gas when circulation to its adverse effect of bringing fully.
Summary of the invention
What the present invention will solve is that existing technology exists the problems referred to above, is intended to provide a kind of follow-on cooler for recycled exhaust gas that is used for motor, and the operating temperature of EGR valve is in the comparison reasonable range.
The present invention realizes through having following technological scheme:
A kind of cooler for recycled exhaust gas that is used for motor; Comprise cooler for recycled exhaust gas body, EGR valve and turnover air chamber; It is characterized in that described EGR valve and turnover air chamber are separately positioned on the two ends of said cooler for recycled exhaust gas body; The intrinsic waste gas of said cooler for recycled exhaust gas cooling channel is " U " shape structure, and described EGR valve is arranged on the bend place, bottom of said " U " shape waste gas cooling channel.
Cooler for recycled exhaust gas provided by the invention is arranged in the neutral position of exhaust steam passage with the EGR valve, i.e. the bend place, bottom of " U " shape structure, when waste gas when cooler for recycled exhaust gas flows through, the operating temperature of EGR valve is in the comparison reasonable range.
According to the present invention, described EGR valve comprises valve seat and valve body, and described valve seat constitutes the bottom bend of said " U " shape waste gas cooling channel, which is provided with valve opening; Described valve body is provided with the valve that matches with said valve opening; Adopt flange to be connected between described valve body and the valve seat.
The EGR valve seat adopts casting structure, is arranged in the neutral position of cooler for recycled exhaust gas exhaust steam passage, and its operating temperature generally is lower than 300 ℃, so it can adopt the cast aluminium structure and not need other cooling, it with the cooler for recycled exhaust gas body between the employing flange be connected.When the EGR valve seat adopts the cast steel structure, it with the cooler for recycled exhaust gas body between can adopt and be welded to connect, cost is higher than the EGR valve seat of cast aluminium structure, but shared space is littler than the structure that adopts the flange connection.The EGR valve seat adopts casting structure can also adapt to complicated structural requirement well, convenient design exhaust steam passage and valve mechanism.
The EGR valve is connected through face-flange with valve seat, adopts bolton.When the EGR valve was closed, the exhaust steam passage of cooler for recycled exhaust gas was cut off from the centre, and waste gas can not pass through cooler for recycled exhaust gas.When the EGR valve is opened; Waste gas gets into the air inlet side cooling channel of cooler for recycled exhaust gas body through the suction port of turnover air chamber; Get into the side cooling channel of giving vent to anger of cooler for recycled exhaust gas body then through the EGR valve seat, flow out by the air outlet of turnover air chamber at last, realize waste gas cooling and flow control.
This neutral position that the EGR valve is arranged in exhaust steam passage; Be characterized in: the EGT that contacts with the EGR valve is in moderate; Its maximum temperature is in the applicable working temperature scope of EGR valve, and its minimum temperature can not cause waste gas to produce condensation and serious carbon distribution at the valve and the valve opening place of EGR valve yet.Compare with traditional " U " structure cooler for recycled exhaust gas; In the structure of the present invention with seat design at " U " shape bend place; The exhaust gas side passage has saved " U " shape bend, and therefore, the waste gas loss of total pressure through cooler for recycled exhaust gas and valve has obvious decline than conventional construction.
Description of drawings
Fig. 1 is the general structure schematic representation of cooler for recycled exhaust gas of the present invention.
Fig. 2 is the profile schematic representation of cooler for recycled exhaust gas of the present invention.
Fig. 3 is the EGR valve schematic representation that is assembled together with cooler for recycled exhaust gas of the present invention.
Fig. 4 is the structural representation of turnover air chamber of the present invention.
Fig. 5 is the schematic representation of EGR valve of the present invention when valve closes.
Embodiment
The present invention is described further with specific embodiment below in conjunction with accompanying drawing.
Referring to figs. 1 through Fig. 4, a kind of cooler for recycled exhaust gas that is used for motor of the present invention is made up of cooler for recycled exhaust gas body 24, EGR valve and turnover air chamber 27 3 parts.
Described EGR valve comprises valve seat 1 and valve body 4; Described valve seat 1 constitutes the bottom bend of said " U " shape waste gas cooling channel, and the waste gas cooling channel in the cooler for recycled exhaust gas body 24 is divided into the air inlet side cooling channel 30 at the EGR valve upper reaches and the side cooling channel 29 of giving vent to anger in EGR valve downstream.Valve seat 1 is provided with valve opening 3; Described valve body 4 is provided with the valve 2 that matches with said valve opening 3; Adopt flange 22,23 to be connected between described valve body 4 and the valve seat 1.
When adopting weld seam 7 to be connected between valve seat 1 and the cooler for recycled exhaust gas body 24, valve seat 1 employing cast steel structure can't blue face.Also can adopt flange 6,10 to be connected between valve seat 1 and the cooler for recycled exhaust gas body 24, rely on bolton between them, this moment, valve seat 1 can adopt the aluminum casting structure.Turnover air chamber 27 be stainless cast steel part or weld assembly, it with the cooler for recycled exhaust gas body between employing be welded to connect or flange 28 is connected.
Adopt flange 22,23 to be connected between EGR valve 4 and the valve seat 1, rely on bolton between them.When the valve 2 of EGR valve 4 was opened, waste gas flowed into from the suction port 20 of turnover air chamber 27, through cooler for recycled exhaust gas air inlet side cooling channel 30, through EGR valve opening 3, through the cooler for recycled exhaust gas side cooling channel 29 of giving vent to anger, was flowed out by air outlet 19 again; Cooling liquid is cooled off waste gas in the intake tunnel 16 inflow water hull bodies of intake pipe 14, from exhalant canal 17 outflows of outlet pipe 15; The EGR gas that flows through the cooler for recycled exhaust gas body obtains cooling.
Referring to Fig. 5, during valve 2 closures of EGR valve, valve opening 3 is blocked by valve 2, and cooler for recycled exhaust gas air inlet side cooling channel 30 is disconnected from interval by valve 2 with the side cooling channel 29 of giving vent to anger, and waste gas can not circulate.Distance between EGR valve control valve 2 and the valve opening 3 realizes the control of exhaust gas flow size.
What should be understood that is: the foregoing description is just to explanation of the present invention, rather than limitation of the present invention, and any innovation and creation that do not exceed in the connotation scope of the present invention all fall within protection scope of the present invention.
Claims (6)
1. cooler for recycled exhaust gas that is used for motor; Comprise cooler for recycled exhaust gas body (24), EGR valve and turnover air chamber (27); It is characterized in that described EGR valve and turnover air chamber (27) are separately positioned on the two ends of said cooler for recycled exhaust gas body (24); Waste gas cooling channel in the said cooler for recycled exhaust gas body (24) is " U " shape structure, and described EGR valve is arranged on the bend place, bottom of said " U " shape waste gas cooling channel.
2. a kind of cooler for recycled exhaust gas that is used for motor as claimed in claim 1 is characterized in that described EGR valve comprises valve seat (1) and valve body (4), and described valve seat (1) constitutes the bottom bend of said " U " shape waste gas cooling channel, which is provided with valve opening (3); Described valve body (4) is provided with the valve (2) that matches with said valve opening (3); Adopt flange (22,23) to be connected between described valve body (4) and the valve seat (1).
3. a kind of cooler for recycled exhaust gas that is used for motor as claimed in claim 2 is characterized in that described valve seat (1) adopts the cast steel structure, and is connected with described cooler for recycled exhaust gas body (24) through welding.
4. a kind of cooler for recycled exhaust gas that is used for motor as claimed in claim 2 is characterized in that described valve seat (1) adopts the aluminum casting structure, and adopts flange (6,10) to be connected with described cooler for recycled exhaust gas body (24).
5. a kind of cooler for recycled exhaust gas that is used for motor as claimed in claim 2 is characterized in that described EGR valve is divided into the air inlet side cooling channel (30) at the EGR valve upper reaches and the side cooling channel (29) of giving vent to anger in EGR valve downstream with the waste gas cooling channel in the cooler for recycled exhaust gas body (24); When the valve (2) of EGR valve when opening, said air inlet side cooling channel (30) is connected with the side cooling channel (29) of giving vent to anger; When the valve (2) of EGR valve was closed, said air inlet side cooling channel (30) cut off with the side cooling channel (29) of giving vent to anger.
6. like any one described a kind of cooler for recycled exhaust gas that is used for motor of claim 1-5; It is characterized in that described cooler for recycled exhaust gas body (24) comprises EGR valve side mainboard (5), turnover gas side mainboard (8), two groups of cooling tubes (11), water hull body (12), intake pipe (14) and outlet pipe (15); Described cooling tube (11) is arranged in the described water hull body (12), and is connected with said both sides mainboard (5,8) through soldering; Adopt between described both sides mainboard (5,8) and water hull body (12), intake pipe (14) and outlet pipe (15) and the water hull body (12) and be welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100831769A CN102619649A (en) | 2012-03-26 | 2012-03-26 | EGR (exhaust gas recirculation) cooler for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100831769A CN102619649A (en) | 2012-03-26 | 2012-03-26 | EGR (exhaust gas recirculation) cooler for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102619649A true CN102619649A (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100831769A Pending CN102619649A (en) | 2012-03-26 | 2012-03-26 | EGR (exhaust gas recirculation) cooler for engine |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1651748A (en) * | 2004-02-03 | 2005-08-10 | 臼井国际产业株式会社 | Apparatus for cooling EGR gas |
| KR100823654B1 (en) * | 2007-10-02 | 2008-04-21 | 주식회사 코렌스 | Exhaust gas recirculation cooler |
| CN101329142A (en) * | 2007-06-21 | 2008-12-24 | 株式会社T.Rad | EGR cooler |
| FR2938051A1 (en) * | 2008-11-06 | 2010-05-07 | Valeo Systemes Thermiques | Heat exchange unit for use in exhaust gas recirculation circuit of internal combustion engine of motor vehicle, has fixing unit to fix filter element with respect to case such that element is placed near collecting chamber of conduits |
-
2012
- 2012-03-26 CN CN2012100831769A patent/CN102619649A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1651748A (en) * | 2004-02-03 | 2005-08-10 | 臼井国际产业株式会社 | Apparatus for cooling EGR gas |
| CN101329142A (en) * | 2007-06-21 | 2008-12-24 | 株式会社T.Rad | EGR cooler |
| KR100823654B1 (en) * | 2007-10-02 | 2008-04-21 | 주식회사 코렌스 | Exhaust gas recirculation cooler |
| FR2938051A1 (en) * | 2008-11-06 | 2010-05-07 | Valeo Systemes Thermiques | Heat exchange unit for use in exhaust gas recirculation circuit of internal combustion engine of motor vehicle, has fixing unit to fix filter element with respect to case such that element is placed near collecting chamber of conduits |
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Application publication date: 20120801 |