CN209539472U - A kind of exhaust gas recirculation device with by-passing valve - Google Patents
A kind of exhaust gas recirculation device with by-passing valve Download PDFInfo
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- CN209539472U CN209539472U CN201920360339.0U CN201920360339U CN209539472U CN 209539472 U CN209539472 U CN 209539472U CN 201920360339 U CN201920360339 U CN 201920360339U CN 209539472 U CN209539472 U CN 209539472U
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Abstract
The utility model discloses a kind of exhaust gas recirculation device with by-passing valve, it includes cooler for recycled exhaust gas, cooling tube, EGR by-passing valve, air outlet temperature sensor and EGR valve, cooler for recycled exhaust gas and EGR valve are connected to the both ends of EGR by-passing valve, air outlet temperature sensor is mounted on air outlet temperature Sensor mounting boss, and EGR by-passing valve intake pipe is connected on the cooling water inlet pipe of EGR by-passing valve by cooling tube.Whole device passes through the cooperating between cooler for recycled exhaust gas, EGR by-passing valve, air outlet temperature sensor and EGR valve, in the case where exhaust gas temperature is too low, cooling without exhaust gas, it is too low and lead to fouling to effectively prevent cooler for recycled exhaust gas air outlet temperature, to reduce the blocking risk of cooler for recycled exhaust gas；And the device can voluntarily provide coolant liquid from cooler for recycled exhaust gas and cool down to EGR by-passing valve, the temperature at the movement sealing of EGR by-passing valve be reduced, the kinematic axis for efficiently reducing EGR by-passing valve leads to the risk of exhaust gas leakage failure because of high temperature.
Description
Technical field
The utility model belongs to technical field of engines, and in particular to a kind of exhaust gas recirculation device with by-passing valve.
Background technique
Gas recirculation system (Exhaust Gas Recirculation) abbreviation EGR is the exhaust gas for generating engine
Sub-fraction send the technology that cylinder burns once again back to again, specifically, by engine be discharged exhaust gas mixed with fresh air after
Cylinder is entered back into, main purpose is to reduce the nitrogen oxides in tail gas (NOx) discharge.
Engine is in cold-start phase and low-speed low-load region, and engine row's temperature can be relatively low, so as to cause starting
There are risk of exceeding criterion by the NOx of machine；So egr system needs to increase bypass line under these operating conditions, engine exhaust temperature is improved
Degree；Wherein, EGR bypass refers to that EGR exhaust is directly entered circulation line without subcooler and is conveyed, to improve gas temperature
Degree.
EGR by-passing valve is exactly to control EGR exhaust to be carried out cooling valve without cooler for recycled exhaust gas, when engine operation
By-passing valve is in hot environment, this just makes the movement sealing of EGR by-passing valve be easy failure, leads to by-passing valve gas leakage；In addition, EGR
Cooler is in use, need for exhaust gas to imported into cooler for recycled exhaust gas, and contain aqueous vapor and unburned HC(HC in exhaust gas for carbon
The abbreviation of hydrogen compound Hydrocarbon), sulfide and acidic materials etc., the object being easy to cause in low temperature environment in exhaust gas
Matter condenses in cooler for recycled exhaust gas, and final fouling leads to the blocking of cooler for recycled exhaust gas.
Utility model content
The utility model proposes a kind of exhaust gas recirculation device with by-passing valve, to solve to propose in above-mentioned background technique
The problem of.The technical solution of the utility model is achieved in that
A kind of exhaust gas recirculation device with by-passing valve comprising cooler for recycled exhaust gas, cooling tube, EGR by-passing valve, outlet
Temperature sensor and EGR valve,
The cooler for recycled exhaust gas be equipped with cooler for recycled exhaust gas water inlet pipe, cooler for recycled exhaust gas bypass pipe, EGR by-passing valve intake pipe and
Cooler for recycled exhaust gas outlet pipe；
The EGR by-passing valve includes EGR bypass valve body, EGR by-passing valve cooling water inlet pipe, EGR by-passing valve valve block, EGR
By-passing valve cooling water channel, EGR by-passing valve cooling water outlet pipe and air outlet temperature Sensor mounting boss；
The cooler for recycled exhaust gas and EGR valve are connected to the both ends of the EGR by-passing valve, the cooler for recycled exhaust gas, EGR valve
Gasket one and gasket two are respectively equipped between EGR by-passing valve, the air outlet temperature sensor is mounted on the air outlet temperature and passes
On sensor installation base, the EGR by-passing valve intake pipe is connected to the cooling water inlet pipe of the EGR by-passing valve by cooling tube
On.
In the exhaust gas recirculation device with by-passing valve of the utility model, the cooler for recycled exhaust gas bypass pipe is welded on institute
The outside of cooler for recycled exhaust gas is stated, cooler for recycled exhaust gas bypass pipe middle section is bellows structure, the EGR by-passing valve intake pipe setting
On the top of the cooler for recycled exhaust gas.
In the exhaust gas recirculation device with by-passing valve of the utility model, the EGR by-passing valve cooling water channel setting exists
At the movement sealing of the EGR bypass valve body, the cooling water inlet pipe of the EGR by-passing valve and EGR by-passing valve cooling water outlet pipe
It is threadedly attached on the EGR bypass valve body respectively, and threaded connection place is coated with sealant.
In the exhaust gas recirculation device with by-passing valve of the utility model, the cooler for recycled exhaust gas and EGR valve pass through respectively
Four are bolted to the both ends of the EGR by-passing valve.
In the exhaust gas recirculation device with by-passing valve of the utility model, with sealing on the air outlet temperature sensor
Gasket, the gasket seal are located at the air outlet temperature sensor and air outlet temperature Sensor mounting boss junction.
In the exhaust gas recirculation device with by-passing valve of the utility model, the cooling tube and EGR by-passing valve are fetched water
The both ends of the cooling water inlet pipe connection of pipe, EGR by-passing valve pass through clip clamping respectively.
This exhaust gas recirculation device with by-passing valve for implementing the utility model, has the advantages that
(1) by the way that the middle section of cooler for recycled exhaust gas bypass pipe is arranged to bellows structure, welding deformation can effectively be eliminated
And the stress generated；
(2) it by the way that EGR by-passing valve intake pipe to be arranged in the top of cooler for recycled exhaust gas, can not only be provided for EGR by-passing valve
Coolant liquid, moreover it is possible in cooler for recycled exhaust gas because coolant boiling generate bubble take away, prevent cooler for recycled exhaust gas because boiling dry combustion method
And it fails；
(3) it is bypassed at the movement sealing of valve body by the way that EGR is arranged in EGR by-passing valve cooling water channel, when EGR is cooling
Coolant liquid on device is introduced into EGR by-passing valve, is entered from the cooling water inlet pipe of EGR by-passing valve, is flowed to EGR by-passing valve cooling water outlet
Pipe, so that temperature reduces at the movement sealing of EGR by-passing valve, efficiently reduces EGR by EGR by-passing valve cooling water channel
Risk of the kinematic axis of by-passing valve because of exhaust gas leakage failure caused by high temperature；
(4) whole device passes through the cooperation work between cooler for recycled exhaust gas, EGR by-passing valve, air outlet temperature sensor and EGR valve
Make, the temperature that EGR by-passing valve is measured according to air outlet temperature sensor, the switch of EGR by-passing valve is controlled, when EGR by-passing valve outlet
When temperature is too low, EGR by-passing valve work, exhaust gas fully enters cooler for recycled exhaust gas bypass pipe, and exhaust gas does not cool down, and can effectively prevent
Only cooler for recycled exhaust gas air outlet temperature is too low and lead to fouling, to reduce the blocking risk of cooler for recycled exhaust gas.
Detailed description of the invention
Fig. 1 is the assembling schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of the cooler for recycled exhaust gas of the utility model；
Fig. 3 is the structural schematic diagram of the EGR by-passing valve of the utility model；
Fig. 4 is the structural schematic diagram of the EGR valve of the utility model；
Fig. 5 is the structural schematic diagram of the air outlet temperature sensor of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe.
A kind of exhaust gas recirculation device with by-passing valve as shown in Fig. 1 to 5, including cooler for recycled exhaust gas 1, cooling tube 2,
EGR by-passing valve 3, air outlet temperature sensor 4 and EGR valve 5,
Cooler for recycled exhaust gas 1 is equipped with cooler for recycled exhaust gas water inlet pipe 101, cooler for recycled exhaust gas bypass pipe 102, EGR by-passing valve intake pipe
103 and cooler for recycled exhaust gas outlet pipe 104, cooler for recycled exhaust gas bypass pipe 102 is welded on the outside of cooler for recycled exhaust gas 1, by cooler for recycled exhaust gas
102 middle section of siphunculus is bellows structure, and energy dissipating enough removes welding deformation and the stress that generates；The setting of EGR by-passing valve intake pipe is existed
The top of cooler for recycled exhaust gas 1 can not only provide coolant liquid for EGR by-passing valve 3, moreover it is possible in cooler for recycled exhaust gas 1 because of coolant liquid boiling
The bubble for rising generation is taken away, and prevents cooler for recycled exhaust gas 1 and fails because of boiling dry combustion method.
EGR by-passing valve 3 includes EGR bypass valve body 301, EGR by-passing valve cooling water inlet pipe 302, EGR by-passing valve valve block
303, EGR by-passing valve cooling water channel 304, EGR by-passing valve cooling water outlet pipe 305 and air outlet temperature Sensor mounting boss 306,
EGR by-passing valve cooling water channel 304 is arranged at the movement sealing of EGR bypass valve body 301, the cooling water inlet pipe of EGR by-passing valve
302 are threadedly attached on EGR bypass valve body 301 respectively with EGR by-passing valve cooling water outlet pipe 305, and threaded connection place
It is coated with sealant.When work, when the coolant liquid on cooler for recycled exhaust gas is introduced into EGR by-passing valve, from the cooling water inlet of EGR by-passing valve
Pipe 302 enters, and EGR by-passing valve cooling water outlet pipe 305 is flowed to, by EGR by-passing valve cooling water channel 304, so that EGR by-passing valve 1
Movement sealing at temperature reduce, efficiently reduce EGR by-passing valve 1 kinematic axis because high temperature caused by exhaust gas leakage
The risk of failure；And the sealant of threaded connection place can be effectively prevented coolant liquid leakage.
Cooler for recycled exhaust gas 1 and EGR valve 5 are connected to the both ends of EGR by-passing valve 3 by four bolts 8 respectively, cooler for recycled exhaust gas 1,
Gasket 1 and gasket 27 are respectively equipped between EGR valve 5 and EGR by-passing valve 3, air outlet temperature sensor 4 is mounted on air outlet temperature
It on Sensor mounting boss 306, is sealed by the gasket seal 401 on air outlet temperature sensor 4, the water intaking of EGR by-passing valve
Pipe 103 is connected on the cooling water inlet pipe 302 of EGR by-passing valve by cooling tube 2, and cooling tube 2 and EGR by-passing valve intake pipe
103, the both ends that the cooling water inlet pipe 302 of EGR by-passing valve connects pass through 9 clamping of clip respectively.When work, EGR by-passing valve 3 is according to out
The measuring temperature of gas temperature sensor 4 controls the switch of EGR by-passing valve 5, when 5 air outlet temperature of EGR by-passing valve is too low, by EGR
Port valve 5 works, and exhaust gas fully enters cooler for recycled exhaust gas bypass pipe 12, and exhaust gas does not cool down, and can be effectively prevented cooler for recycled exhaust gas 1 and go out
Temperature spends low and leads to fouling, to reduce the blocking risk of cooler for recycled exhaust gas 1.
The working principle of this case: when work, when air outlet temperature sensor 4 detects temperature of the air outlet temperature lower than setting
When, EGR by-passing valve 3 works, and EGR by-passing valve valve block 303 is rotated by 90 °, and cooling duct is closed, and bypass passageways are opened, exhaust gas without
It is cooling, all entered in EGR valve 5 by cooler for recycled exhaust gas bypass pipe 102 by bypass passageways, prevents 1 air outlet temperature of cooler for recycled exhaust gas
It is too low and lead to fouling, to effectively reduce the blocking risk of cooler for recycled exhaust gas 1；When air outlet temperature sensor 4 detects out temperature
When degree is higher than the temperature of setting, 303 opposite direction of EGR by-passing valve valve block is rotated by 90 °, and cooling duct is opened, and bypass passageways are closed
It closes, exhaust gas all through supercooling, reduces exhaust gas temperature, prevents Engine Inlet Temperature high and leads to deficiency of air, thus shadow
Ring engine power.
Embodiment is not intended to limit the utility model, and within the spirit and principle of the utility model, is made
Any modification, equivalent substitution, improvement and etc., should be included within the scope of protection of this utility model.
Claims (6)
1. a kind of exhaust gas recirculation device with by-passing valve, which is characterized in that including cooler for recycled exhaust gas (1), cooling tube (2),
EGR by-passing valve (3), air outlet temperature sensor (4) and EGR valve (5),
The cooler for recycled exhaust gas (1) is equipped with cooler for recycled exhaust gas water inlet pipe (101), cooler for recycled exhaust gas bypass pipe (102), EGR by-passing valve
Intake pipe (103) and cooler for recycled exhaust gas outlet pipe (104)；
The EGR by-passing valve (3) includes EGR bypass valve body (301), EGR by-passing valve cooling water inlet pipe (302), EGR by-passing valve
Valve block (303), EGR by-passing valve cooling water channel (304), EGR by-passing valve cooling water outlet pipe (305) and the installation of air outlet temperature sensor
Boss (306)；
The cooler for recycled exhaust gas (1) and EGR valve (5) are connected to the both ends of the EGR by-passing valve (3), the cooler for recycled exhaust gas
(1), gasket one (6) and gasket two (7), the air outlet temperature sensor are respectively equipped between EGR valve (5) and EGR by-passing valve (3)
(4) it is mounted on the air outlet temperature Sensor mounting boss (306), the EGR by-passing valve intake pipe (103) is soft by cooling
Pipe (2) is connected on the EGR by-passing valve cooling water inlet pipe (302).
2. the exhaust gas recirculation device according to claim 1 with by-passing valve, which is characterized in that by the cooler for recycled exhaust gas
Siphunculus (102) is welded on the outside of the cooler for recycled exhaust gas (1), and cooler for recycled exhaust gas bypass pipe (102) middle section is bellows knot
Structure, top of EGR by-passing valve intake pipe (103) setting in the cooler for recycled exhaust gas (1).
3. the exhaust gas recirculation device according to claim 1 with by-passing valve, which is characterized in that the EGR by-passing valve is cold
But water channel (304) setting is at the movement sealing of EGR bypass valve body (301), the cooling water inlet pipe of the EGR by-passing valve
(302) it is threadedly attached in respectively with EGR by-passing valve cooling water outlet pipe (305) on EGR bypass valve body (301), and
Threaded connection place is coated with sealant.
4. the exhaust gas recirculation device according to claim 1 with by-passing valve, which is characterized in that the cooler for recycled exhaust gas (1)
It is connected to the both ends of the EGR by-passing valve (3) by four bolts (8) respectively with EGR valve (5).
5. the exhaust gas recirculation device according to claim 1 with by-passing valve, which is characterized in that the air outlet temperature sensing
Gasket seal (401) are had on device (4), the gasket seal (401) is located at the air outlet temperature sensor (4) and air outlet temperature
Sensor mounting boss (306) junction.
6. the exhaust gas recirculation device according to claim 1 with by-passing valve, which is characterized in that the cooling tube (2)
The both ends connecting with EGR by-passing valve intake pipe (103), EGR by-passing valve cooling water inlet pipe (302) pass through clip (9) clamping respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920360339.0U CN209539472U (en) | 2019-03-21 | 2019-03-21 | A kind of exhaust gas recirculation device with by-passing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920360339.0U CN209539472U (en) | 2019-03-21 | 2019-03-21 | A kind of exhaust gas recirculation device with by-passing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209539472U true CN209539472U (en) | 2019-10-25 |
Family
ID=68275421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920360339.0U Active CN209539472U (en) | 2019-03-21 | 2019-03-21 | A kind of exhaust gas recirculation device with by-passing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209539472U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096543A (en) * | 2020-08-13 | 2020-12-18 | 东风汽车集团有限公司 | EGR system and car |
| CN113464324A (en) * | 2021-07-27 | 2021-10-01 | 无锡双翼汽车环保科技有限公司 | Multichannel EGR cooler |
-
2019
- 2019-03-21 CN CN201920360339.0U patent/CN209539472U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096543A (en) * | 2020-08-13 | 2020-12-18 | 东风汽车集团有限公司 | EGR system and car |
| CN112096543B (en) * | 2020-08-13 | 2021-12-07 | 东风汽车集团有限公司 | EGR system and car |
| CN113464324A (en) * | 2021-07-27 | 2021-10-01 | 无锡双翼汽车环保科技有限公司 | Multichannel EGR cooler |
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