CN204783337U - EGR disk seat - Google Patents
EGR disk seat Download PDFInfo
- Publication number
- CN204783337U CN204783337U CN201520382042.6U CN201520382042U CN204783337U CN 204783337 U CN204783337 U CN 204783337U CN 201520382042 U CN201520382042 U CN 201520382042U CN 204783337 U CN204783337 U CN 204783337U
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- CN
- China
- Prior art keywords
- seat body
- valve seat
- air
- disk seat
- egr
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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
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- Exhaust-Gas Circulating Devices (AREA)
Abstract
The utility model discloses a EGR disk seat, including the disk seat body, the front end of disk seat body is equipped with and gos deep into the inside chamber of admitting air of disk seat body, the rear end of disk seat body is equipped with deepens the inside play air cavity of disk seat body, it is equipped with two to go out the air cavity, the scene 2 air cavity is located the top and the below in the chamber of admitting air respectively, chamber and the play air cavity of admitting air is crisscross from beginning to end, the upside of disk seat body be equipped with go deep into the disk seat body inside and with the chamber of admitting air, go out the valve mounting hole that the air cavity all feeds through, the position that is close to the front end on the EGR disk seat body is equipped with the admit air sensor mounting bore in chamber of two intercommunications, temperature sensor is do not installed in the punishment of two sensor mounting bore, pressure sensor, install differential pressure sensor on the disk seat body, be equipped with on the disk seat body respectively with the chamber of admitting air, go out the gas pocket that the air cavity is linked together, two gauge heads of differential pressure sensor insert respectively in the gas pocket. The utility model discloses can conveniently the flow through exhaust gas flow's of EGR valve calculation more has the degree of integrating height, compact structure's beneficial effect.
Description
Technical field
The utility model relates to a kind of EGR valve seat.
Background technique
EGR is that a part for Exhaust Gas importing air intake circuits in internal combustion engines makes it enter the technology of circulation once again by internal-combustion engine after combustion.Nitrogen oxide in Exhaust Gas can be reduced by EGR and can fuel economy be improved when sub load.EGR realizes by being communicated with recirculation siphunculus road between Engine exhaust pipeline with air inlet pipeline, recirculating line is installed EGR valve seat, EGR valve seat is provided with EGR valve, exhaust gas flow on recirculating line can be controlled by the setting of EGR valve seat and EGR valve.As shown in Figure 1, existing EGR valve comprises cylinder barrel, the lower ending opening of cylinder barrel, the barrel of cylinder barrel is provided with upper and lower two ventilating holes, the upper piston that two vents can be separated up and down, the lower piston shutoff of cylinder barrel lower ending opening can got up is provided with in cylinder barrel, two-piston is connected as a single entity by piston rod, and the upper end of cylinder barrel is provided with for the up and down power plant of piston rod; Existing EGR valve seat comprises valve seat body, the front end of valve seat body is provided with the air-inlet cavity going deep into valve seat body inside, the rear end of valve seat body is provided with the outlet chamber going deep into valve seat body inside, outlet chamber is provided with two, two outlet chambers lay respectively at above and below air-inlet cavity, air-inlet cavity and outlet chamber are staggered front to back, and the upside of valve seat body is provided with gos deep into the inner and valve mounting hole be all communicated with air-inlet cavity, outlet chamber of valve seat body; During use, EGR valve is arranged on EGR valve seat, the cylinder barrel of EGR valve is inserted in the valve mounting hole on EGR valve seat, two vents on cylinder barrel and air-inlet cavity and to be positioned at the outlet chamber of top corresponding respectively, the lower end of cylinder barrel is mutually concordant with the upper inside walls of another outlet chamber, the rear and front end of EGR valve seat is connected with back segment with the leading portion of recirculating line respectively, by two-piston being made up and down to the control of power plant, changes the exhaust gas flow flowing through EGR valve thus.In order to realize controlling more accurately EGR valve, the exhaust gas flow to flowing through EGR valve is needed to calculate.
Summary of the invention
The purpose of this utility model is to provide a kind of EGR valve seat being convenient to calculate the exhaust gas flow flowing through EGR valve.
For achieving the above object, the utility model comprises valve seat body, the front end of valve seat body is provided with the air-inlet cavity going deep into valve seat body inside, the rear end of valve seat body is provided with the outlet chamber going deep into valve seat body inside, outlet chamber is provided with two, two outlet chambers lay respectively at above and below air-inlet cavity, air-inlet cavity and outlet chamber are staggered front to back, the upside of valve seat body be provided with go deep into valve seat body inner and and air-inlet cavity, the valve mounting hole that outlet chamber is all communicated with, its structural feature is that described EGR valve seat body is provided with near the position of front end the sensor mounting hole that two are communicated with air-inlet cavity, two sensors mounting hole place is separately installed with temperature transducer, pressure transducer, valve seat body is provided with differential pressure pickup, valve seat body be provided with respectively with air-inlet cavity, the pore that outlet chamber is connected, two gauge heads of differential pressure pickup are inserted in a pore respectively.
The rear and front end of described valve seat body is equipped with adpting flange.
The upside of described valve seat body is provided with the valve installation base for installing EGR valve.
The left side of described valve seat body is provided with the Sensor mounting boss for installing differential pressure pickup, and Sensor mounting boss is provided with the duct for the cooling liquid that circulates.
Adopt after said structure, temperature transducer, pressure transducer, differential pressure pickup can measure the pressure reduction before valve before and after exhaust gas temperature, pressure and valve respectively, can calculate the exhaust gas flow flowing through EGR valve easily after obtaining above parameter; In addition, all the sensors has all been integrated on a part by the utility model, and space is arranged and simplified, and structure is comparatively compact.The rear and front end of valve seat body is equipped with adpting flange, can be convenient to the connection of EGR valve seat and recirculating line; The upside of valve seat body is provided with the valve installation base for installing EGR valve, can be convenient to the installation of EGR valve; The left side of valve seat body is provided with Sensor mounting boss; the installation of differential pressure pickup can be convenient to; Sensor mounting boss is provided with the duct for the cooling liquid that circulates, and can realize the cooling to differential pressure pickup by the cooling liquid that circulates in duct, can also play the effect of protection EGR valve in addition.
In sum, the utility model conveniently can flow through the calculating of the exhaust gas flow of EGR valve, has more integration degree high, the beneficial effect of compact structure.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described in detail:
Fig. 1 is the structural representation that existing EGR valve is arranged on EGR valve seat;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is along the structural representation after the cutting of A-A direction in Fig. 2;
Fig. 4 is along the structural representation after the cutting of B-B direction in Fig. 3;
Fig. 5 is the structural representation that EGR valve is arranged on the utility model.
Embodiment
As shown in Figures 2 to 4, this EGR valve seat comprises valve seat body 1, the front end of valve seat body 1 is provided with the air-inlet cavity 2 going deep into valve seat body 1 inside, the rear end of valve seat body 1 is provided with the outlet chamber 3 going deep into valve seat body 1 inside, outlet chamber 3 is provided with two, two outlet chambers 3 lay respectively at above and below air-inlet cavity 2, air-inlet cavity 2 and outlet chamber 3 are staggered front to back, the upside of valve seat body 1 be provided with go deep into valve seat body 1 inner and with air-inlet cavity 2, the valve mounting hole 4 that outlet chamber 3 is all communicated with, it is characterized in that described EGR valve seat body 1 is provided with near the position of front end the sensor mounting hole 5 that two are communicated with air-inlet cavity 2, two sensors mounting hole 5 place is separately installed with temperature transducer 6, pressure transducer 7, valve seat body 1 is provided with differential pressure pickup 8, valve seat body 1 be provided with respectively with air-inlet cavity 2, the pore 9 that outlet chamber 3 is connected, two gauge heads of differential pressure pickup 8 are inserted in a pore 9 respectively.Further, the rear and front end of valve seat body 1 is equipped with adpting flange 10, so that the connection of EGR valve seat and recirculating line.Further, the upside of valve seat body 1 is provided with the valve installation base 11 for installing EGR valve, so that the installation of EGR valve.Further; the left side of valve seat body 1 is provided with the Sensor mounting boss 12 for installing differential pressure pickup 8; so that the installation of differential pressure pickup 8; Sensor mounting boss 12 is provided with the duct 13 for the cooling liquid that circulates; the cooling to differential pressure pickup 8 can be realized by the cooling liquid that circulates in duct 13, the effect of protection EGR valve can also be played in addition.
Fig. 5 shows the assembly relation of EGR valve and EGR valve seat, the cylinder barrel of EGR valve is inserted in the valve mounting hole 4 on EGR valve seat, two vents on cylinder barrel and air-inlet cavity 2 and to be positioned at the outlet chamber 3 of top corresponding respectively, the lower end of cylinder barrel is mutually concordant with the upper inside walls of another outlet chamber 3, by two-piston being made up and down to the control of power plant, change the exhaust gas flow flowing through EGR valve thus.
Under using state, the rear and front end of EGR valve seat is connected with back segment with the leading portion of recirculating line respectively, the temperature transducer 6 that valve seat body 1 is installed, pressure transducer 7, differential pressure pickup 8 can measure the pressure reduction before valve before and after exhaust gas temperature, pressure and valve respectively, can calculate the exhaust air mass flow flowing through EGR valve after collecting above-mentioned data by following formula.
Wherein:
for exhaust mass; C
dfor flow coefficient; A
rfor reference circulation area;
for waste gas density before valve; U
isfor the constant entropy flow velocity of waste gas before valve;
for the stagnation density of waste gas before valve; P
rfor along airflow direction, the ratio of pressure total before the static pressure after valve and valve, P
rnumerical value can calculate according to the pressure reduction before and after exhaust gas temperature before valve and valve;
for ratio of specific heat when 300k (air equal 1.4); R is gas constant; T
0for exhaust gas temperature before valve.
In control strategy, obtain C by a transformation curve based on EGR aperture
dvalue.This curve can steady flow testbed or other can provide on the instrument of steady air flow and demarcate.Because waste gas forward is by EGR valve and oppositely different back through the flow coefficient of the gas of EGR valve, so need forward and reverse two different transformation curves.A
rdetermined by the basic structure of valve.
and U
iscalculated by the pressure reduction before and after exhaust gas temperature, pressure and valve before the valve of measurement.So just can obtain by model the exhaust air mass flow flowing through EGR valve.After transducer calibration completes, find by gathering pressure reduction before and after the EGR valve under different operating mode, due to the impact of exhaust pulses, before and after EGR valve, pressure reduction is the fluctuation of similar sine wave.After waste gas flows through EGR valve, under the effect of exhaust pulses, understand the phenomenon before generating portion waste gas flows back to EGR valve again.So when calculating exhaust air mass flow, also need the exhaust air mass flow before calculating total exhaust air mass flow flowing through EGR valve respectively and flowing back to valve, then two-part subtract each other, and just can obtain the real exhaust air mass flow flowing through EGR valve in an exhaust pulses process.
Claims (4)
1. an EGR valve seat, comprise valve seat body (1), the front end of valve seat body (1) is provided with gos deep into the inner air-inlet cavity (2) of valve seat body (1), the rear end of valve seat body (1) is provided with gos deep into the inner outlet chamber (3) of valve seat body (1), outlet chamber (3) is provided with two, two outlet chambers (3) lay respectively at above and below air-inlet cavity (2), air-inlet cavity (2) and outlet chamber (3) are staggered front to back, the upside of valve seat body (1) be provided with go deep into valve seat body (1) inner and with air-inlet cavity (2), the valve mounting hole (4) that outlet chamber (3) is all communicated with, it is characterized in that the upper position near front end of described EGR valve seat body (1) is provided with the sensor mounting hole (5) that two are communicated with air-inlet cavity (2), two sensors mounting hole (5) place is separately installed with temperature transducer (6), pressure transducer (7), valve seat body (1) is provided with differential pressure pickup (8), valve seat body (1) be provided with respectively with air-inlet cavity (2), the pore (9) that outlet chamber (3) is connected, two gauge heads of differential pressure pickup (8) are inserted in a pore (9) respectively.
2. EGR valve seat according to claim 1, is characterized in that the rear and front end of described valve seat body (1) is equipped with adpting flange (10).
3. EGR valve seat according to claim 1, is characterized in that the upside of described valve seat body (1) is provided with the valve installation base (11) for installing EGR valve.
4. the EGR valve seat according to claim arbitrary in claims 1 to 3, it is characterized in that the left side of described valve seat body (1) is provided with the Sensor mounting boss (12) for installing differential pressure pickup (8), Sensor mounting boss (12) is provided with the duct (13) for the cooling liquid that circulates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520382042.6U CN204783337U (en) | 2015-06-06 | 2015-06-06 | EGR disk seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520382042.6U CN204783337U (en) | 2015-06-06 | 2015-06-06 | EGR disk seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204783337U true CN204783337U (en) | 2015-11-18 |
Family
ID=54523399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520382042.6U Active CN204783337U (en) | 2015-06-06 | 2015-06-06 | EGR disk seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204783337U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673266A (en) * | 2016-01-14 | 2016-06-15 | 潍柴动力股份有限公司 | EGR waste gas flow measuring method of EGR engine |
| CN106762243A (en) * | 2016-11-29 | 2017-05-31 | 东风朝阳朝柴动力有限公司 | Diesel engine air inlet tube device |
| CN111692022A (en) * | 2020-07-06 | 2020-09-22 | 广西玉柴机器股份有限公司 | Natural gas engine EGR flowmeter mounting seat with electric auxiliary heating |
-
2015
- 2015-06-06 CN CN201520382042.6U patent/CN204783337U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673266A (en) * | 2016-01-14 | 2016-06-15 | 潍柴动力股份有限公司 | EGR waste gas flow measuring method of EGR engine |
| CN105673266B (en) * | 2016-01-14 | 2018-05-04 | 潍柴动力股份有限公司 | A kind of EGR exhaust measuring method of EGR engine |
| CN106762243A (en) * | 2016-11-29 | 2017-05-31 | 东风朝阳朝柴动力有限公司 | Diesel engine air inlet tube device |
| CN111692022A (en) * | 2020-07-06 | 2020-09-22 | 广西玉柴机器股份有限公司 | Natural gas engine EGR flowmeter mounting seat with electric auxiliary heating |
| CN111692022B (en) * | 2020-07-06 | 2024-03-12 | 广西玉柴机器股份有限公司 | EGR flowmeter mounting seat of natural gas engine with electric auxiliary heating |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |