CN109443460A - A kind of Venturi meter - Google Patents
A kind of Venturi meter Download PDFInfo
- Publication number
- CN109443460A CN109443460A CN201811600228.9A CN201811600228A CN109443460A CN 109443460 A CN109443460 A CN 109443460A CN 201811600228 A CN201811600228 A CN 201811600228A CN 109443460 A CN109443460 A CN 109443460A
- Authority
- CN
- China
- Prior art keywords
- aditus laryngis
- pipeline section
- pressure
- section
- main leg
- 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
- 238000010079 rubber tapping Methods 0.000 claims abstract description 37
- 230000008676 import Effects 0.000 claims description 31
- 230000008602 contraction Effects 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 210000000867 larynx Anatomy 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/44—Venturi tubes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of Venturi meters, including main leg, aditus laryngis pipeline section and aditus laryngis pressure pipe, wherein inlet and outlet is provided on main leg, the tube wall of main leg is equipped with high pressure pressure tappings and low pressure pressure tappings；Aditus laryngis pipeline section connect with main leg's co-axial seal and can move relative to main leg along axial reciprocating；The first end of aditus laryngis pressure pipe is connected to low pressure pressure tappings, and second end extends to the mouth of shouting of aditus laryngis pipeline section, and the second end of aditus laryngis pressure pipe can be with the relative movement of aditus laryngis pipeline section and main leg by aditus laryngis pipeline section and main leg's on or off；It can be seen that, above-mentioned Venturi meter with EGR valve function, can throttling set quantity in reduction system, reduce restriction loss, be conducive to promote EGR rate and EGR flow, and valve block is not present, passage section is always ring section, and symmetry is high, flow perturbation is small, fluctuate it is small, make EGR flow it is more uniform, stablize, conducive to improve EGR exhaust flow measurement accuracy.
Description
Technical field
The present invention relates to engine EGR technical field, in particular to a kind of Venturi meter.
Background technique
Current EGR engine egr system is in such a way that EGR valve and two part combination of Venturi meter use: EGR valve
EGR exhaust flow is controlled, Venturi meter measures EGR exhaust flow.
EGR valve is applied in combination simultaneously with Venturi meter, so that throttling set increases in egr system, the section of egr system
Stream loss increases, and is unfavorable for promoting EGR rate and EGR flow, and traditional EGR valve generally adjusts air-flow by valve block, air-flow passes through
When valve block, vulnerable to the disturbance of valve block, the measurement of Venturi meter below is interfered, reduces its measurement accuracy.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of Venturi meter, to reduce throttle in egr system
Part improves flow measurement precision.
To achieve the above object, the invention provides the following technical scheme:
A kind of Venturi meter, comprising:
Main leg, is provided with import and outlet, along the import to the outlet on the tube wall of the main leg
Direction is successively arranged high pressure pressure tappings and low pressure pressure tappings；
Aditus laryngis pipeline section, the aditus laryngis pipeline section is connect with main leg's co-axial seal and the aditus laryngis pipeline section can be relative to institute
Main leg is stated to move along axial reciprocating；
Aditus laryngis pressure pipe, the first end of the aditus laryngis pressure pipe are connected to the low pressure pressure tappings, and second end is to the larynx
Mouth pipeline section shouts mouth extension, and the second end of the aditus laryngis pressure pipe can be opposite with the main leg's with the aditus laryngis pipeline section
It moves the aditus laryngis pipeline section and main leg's on or off.
Preferably, the main leg includes import pipeline section and outlet pipe section, the both ends of the aditus laryngis pipeline section respectively with institute
State import pipeline section and outlet pipe section connection, the high pressure pressure tappings, the low pressure pressure tappings and the aditus laryngis pressure
Pipe is set in the import pipeline section.
Preferably, the end of the import pipeline section and the outlet pipe section towards the aditus laryngis pipeline section is respectively arranged with company
Socket part, the both ends of the aditus laryngis pipeline section are respectively arranged with auxiliary section, the auxiliary section at the both ends of the aditus laryngis pipeline section respectively with it is described
The interconnecting piece on interconnecting piece and the aditus laryngis pipeline section on import pipeline section is mating.
Preferably, the interconnecting piece is annular slot, and the auxiliary section is annular plug.
Preferably, the aditus laryngis pressure pipe is L-shaped, and the first end of the aditus laryngis pressure pipe and the low pressure pressure tappings are same
Axis setting, second end and the aditus laryngis pipeline section are coaxially disposed.
Preferably, being connected smoothly between the contraction section of the aditus laryngis pipeline section, aditus laryngis and diffuser, it is hourglass-shaped to constitute
Channel.
Preferably, the second end of the aditus laryngis pressure pipe is in water-drop-shaped structure, and the small end direction of the water-drop-shaped structure
The aditus laryngis pipeline section.
Preferably, rounding off connects between each section outer surface on the aditus laryngis pressure pipe.
It preferably, further include differential pressure pickup, the high pressure test side of the differential pressure pickup is set to the high pressure pressure
Mouthful, the low pressure test side of the differential pressure pickup is set to the low pressure pressure tappings.
Preferably, the minimum dimension of the second end of the aditus laryngis pressure pipe is less than the aditus laryngis size of the aditus laryngis pipeline section.
In conclusion Venturi meter provided by the invention includes main leg, aditus laryngis pipeline section and aditus laryngis pressure pipe,
In, it is provided with import and outlet on main leg, is successively arranged high pressure pressure along import to export direction on the tube wall of main leg
Mouth and low pressure pressure tappings；Aditus laryngis pipeline section is connect with main leg's co-axial seal and aditus laryngis pipeline section can be relative to main leg along axial past
Multiple movement, low pressure pressure tappings and high pressure pressure tappings are respectively positioned on the upstream of aditus laryngis pipeline section；The first end and low pressure of aditus laryngis pressure pipe
Pressure tappings connection, second end extends to the mouth of shouting of aditus laryngis pipeline section, and the second end of aditus laryngis pressure pipe can be with aditus laryngis pipeline section and master
The relative movement of pipeline section by aditus laryngis pipeline section and main leg's on or off, i.e., the second end of aditus laryngis pressure pipe can by with aditus laryngis
Flow channels between aditus laryngis pipeline section and main leg are truncated for the cooperation of pipeline section aditus laryngis, the second end and aditus laryngis point of aditus laryngis pressure pipe
From when, with the increase of the second end and aditus laryngis distance of aditus laryngis pressure pipe, passage section between aditus laryngis pipeline section and main leg by
It is cumulative big；When in use, one side user can utilize aditus laryngis pressure pipe by the relative position of adjusting aditus laryngis pipeline section and main leg
Second end adjust the cross-sectional flow area between aditus laryngis pipeline section and main leg, realize the conducting of aditus laryngis pipeline section and main leg or cut
Only, the above-mentioned Venturi meter is made to have the function of EGR valve；It is high that another aspect user can acquire entrance by high pressure pressure tappings
Pressure, by the low pressure at the aditus laryngis pressure pipe that connect with low pressure pressure tappings acquisition aditus laryngis, user according to the pressure difference measured and this
When aditus laryngis pressure pipe present position aditus laryngis pipeline section and main leg between practical cross-sectional flow area, pass through Bernoulli equation, energy
Law of conservation and fluid flowing continuity equation etc., can calculate EGR exhaust flow when aditus laryngis pipeline section is in the position,
To realize the survey calculation of EGR exhaust flow；It can be seen that above-mentioned Venturi meter is not necessarily to the function of EGR valve
EGR valve is additionally set in egr system, can in reduction system throttling set quantity, reduce restriction loss, be conducive to be promoted
EGR rate and EGR flow, and valve block is not present in above-mentioned Venturi meter, passage section is always ring section, and symmetry is high,
Flow perturbation is small, and fluctuation is small, so that EGR exhaust air-flow is more uniform, stablizes, conducive to the measurement accuracy for improving EGR exhaust flow.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is structural schematic diagram when Venturi meter provided in an embodiment of the present invention is connected；
Fig. 2 is structural schematic diagram when Venturi meter provided in an embodiment of the present invention ends.
Wherein, 1 is main leg；101 be import pipeline section；102 be outlet pipe section；103 be annular slot；1a is high pressure pressure
Mouthful；1b is low pressure pressure tappings；2 be aditus laryngis pipeline section；201 be annular plug；2a is aditus laryngis；3 be aditus laryngis pressure pipe；301 be water droplet
Shape structure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 and Fig. 2 are please referred to, Fig. 1 is structural schematic diagram when Venturi meter provided in an embodiment of the present invention is connected,
Fig. 2 is structural schematic diagram when Venturi meter provided in an embodiment of the present invention ends.
The embodiment of the invention provides a kind of Venturi meters, including main leg 1, aditus laryngis pipeline section 2 and aditus laryngis pressure
Pipe 3.
Wherein, be provided with import and outlet on main leg 1, on the tube wall of main leg 1 along import to export direction successively
Equipped with high pressure pressure tappings 1a and low pressure pressure tappings 1b；Aditus laryngis pipeline section 2 is connect with 1 co-axial seal of main leg and aditus laryngis pipeline section 2 can
It is moved relative to main leg 1 along axial reciprocating, low pressure pressure tappings 1b and high pressure pressure tappings 1a are respectively positioned on the upper of aditus laryngis pipeline section 2
Trip；The first end of aditus laryngis pressure pipe 3 is connected to low pressure pressure tappings 1b, and second end extends to the mouth of shouting of aditus laryngis pipeline section 2, and aditus laryngis takes
Aditus laryngis pipeline section 2 and main leg 1 can be connected or be cut with the relative movement of aditus laryngis pipeline section 2 and main leg 1 by the second end of pressure pipe 3
Only.
In conclusion compared with prior art, Venturi meter provided in an embodiment of the present invention when in use, on the one hand
User can utilize the second end of aditus laryngis pressure pipe 3 to adjust aditus laryngis pipe by the relative position of adjusting aditus laryngis pipeline section 2 and main leg 1
Cross-sectional flow area between section 2 and main leg 1 realizes the on or off of aditus laryngis pipeline section 2 and main leg 1, to make above-mentioned literary mound
In flowmeter have the function of EGR valve；
Another aspect user can acquire inlet high pressure by high pressure pressure tappings 1a, pass through the larynx connecting with low pressure pressure tappings 1b
Mouthful pressure pipe 3 acquires the low pressure at aditus laryngis 2a, and user is according to the pressure difference measured and 3 present position aditus laryngis of aditus laryngis pressure pipe at this time
Practical cross-sectional flow area between pipeline section 2 and main leg 1 is flowed by Bernoulli equation, law of conservation of energy and fluid and is connected
Continuous property equation etc., can calculate EGR exhaust flow when aditus laryngis pipeline section 2 is in the position, to realize EGR exhaust flow
Survey calculation；
It can be seen that function of the above-mentioned Venturi meter with EGR valve, it is not necessary that EGR is additionally arranged in egr system
Valve, can in reduction system throttling set quantity, reduce restriction loss, be conducive to promote EGR rate and EGR flow, and above-mentioned
Valve block is not present in Venturi meter, and passage section is always ring section, and symmetry is high, and flow perturbation is small, and fluctuation is small, so that
EGR exhaust air-flow is more uniform, stablizes, conducive to the measurement accuracy for improving EGR exhaust flow.
The movement of above-mentioned aditus laryngis pipeline section 2 can realize that the driving fills by the driving device being set to outside Venturi meter
Setting can be Vidacare corp, such as motor, or piston cylinder.
Preferably, main leg 1 includes import pipeline section 101 and outlet pipe section 102, and import pipeline section 101 connects upstream
Equipment, outlet pipe section 102 connect upstream device, and aditus laryngis pipeline section 2 is set between import pipeline section 101 and outlet pipe section 102, aditus laryngis
The both ends of pipeline section 2 are connect with import pipeline section 101 and outlet pipe section 102 respectively, high pressure pressure tappings 1a, low pressure pressure tappings 1b and
Aditus laryngis pressure pipe 3 is set in import pipeline section 101.
A variety of sides can be passed through between import pipeline section 101 and aditus laryngis pipeline section 2 and between outlet pipe section 102 and aditus laryngis pipeline section 2
Formula realizes movable seal connection, for example grafting, is spirally connected, as depicted in figs. 1 and 2, in embodiments of the present invention, import pipeline section
101 and the end of outlet pipe section 102 towards aditus laryngis pipeline section 2 be respectively arranged with interconnecting piece, the both ends of aditus laryngis pipeline section 2 are respectively set
There is auxiliary section, the auxiliary section at the both ends of aditus laryngis pipeline section 2 is respectively and on the interconnecting piece and aditus laryngis pipeline section 2 on import pipeline section 101
Interconnecting piece is mating.Preferably, interconnecting piece is annular slot 103, and auxiliary section is annular plug 201.
In the above-described embodiments, to guarantee sealing, band need to be set between annular slot 103 and annular plug 201.
Above-mentioned technical proposal is advanced optimized, aditus laryngis pressure pipe 3 is L-shaped, and the first end of aditus laryngis pressure pipe 3 takes with low pressure
Mouth 1b coaxial arrangement is pressed, second end and aditus laryngis pipeline section 2 are coaxially disposed.As depicted in figs. 1 and 2, aditus laryngis pressure pipe 3 includes along import
The connection pipeline section and the center pipeline section axially extending along import pipeline section 101 that pipeline section 101 radially extends connect pipeline section far from center
One end of pipeline section is coaxially connected in low pressure pressure tappings 1b, and center pipeline section and import pipeline section 101 are coaxial.Certainly, L shape aditus laryngis pressure pipe
3 be only preferred embodiment provided in an embodiment of the present invention, is actually not limited thereto, and using arc or can not also be advised
Then shape etc., the cross-sectional profile of aditus laryngis pressure pipe 3 are also not limited to circle shown in figure, can be streamlined, to subtract
Few resistance.
Preferably, as depicted in figs. 1 and 2, in embodiments of the present invention, the contraction section of aditus laryngis pipeline section 2, aditus laryngis 2a with
And be connected smoothly between diffuser and constitute hourglass-shaped channel, aditus laryngis can be convenient for using this surface being connected smoothly
Cutoff function is realized in the cooperation of pressure pipe 3 and aditus laryngis 2a.
It can cooperate for the second end convenient for aditus laryngis pressure pipe 3 with aditus laryngis 2a to cut aditus laryngis pipeline section 2 and import pipeline section 101
Only, the minimum dimension of the second end of aditus laryngis pressure pipe 3 is less than the aditus laryngis 2a size of aditus laryngis pipeline section 2, so that the of aditus laryngis pressure pipe 3
It is matched that two ends are inserted into aditus laryngis 2a.
To reduce resistance, as depicted in figs. 1 and 2, in embodiments of the present invention, the second end of aditus laryngis pressure pipe 3 is in water droplet
Shape structure 301, and the small end of water-drop-shaped structure 301, towards aditus laryngis pipeline section 2, the second segment of aditus laryngis pressure pipe 3 uses water-drop-shaped knot
On the one hand the tip of structure 301 can reduce gas-flow resistance, be on the other hand convenient for cooperating with the aditus laryngis 2a in above-described embodiment.
It preferably, can be by rounding off between each section outer surface on aditus laryngis pressure pipe 3 to reduce gas-flow resistance
Connection.
Above-mentioned technical proposal is advanced optimized, differential pressure pickup can also be integrated on above-mentioned Venturi meter, is pressed
The high pressure test side of gap sensor is set to high pressure pressure tappings 1a, and the low pressure test side of differential pressure pickup is set to low pressure pressure tappings
The second end nozzle that 1b, i.e. the low pressure test side of differential pressure pickup stretch to aditus laryngis pressure pipe 3 from low pressure pressure tappings 1b.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of Venturi meter characterized by comprising
Main leg, is provided with import and outlet, along the import to the export direction on the tube wall of the main leg
It is successively arranged high pressure pressure tappings and low pressure pressure tappings；
Aditus laryngis pipeline section, the aditus laryngis pipeline section is connect with main leg's co-axial seal and the aditus laryngis pipeline section can be relative to the master
Pipeline section is moved along axial reciprocating；
Aditus laryngis pressure pipe, the first end of the aditus laryngis pressure pipe are connected to the low pressure pressure tappings, and second end is to the aditus laryngis pipe
Section shouts mouth extension, and the second end of the aditus laryngis pressure pipe can be with the relative movement of the aditus laryngis pipeline section and the main leg
By the aditus laryngis pipeline section and main leg's on or off.
2. Venturi meter according to claim 1, which is characterized in that the main leg includes import pipeline section and goes out
Mouth pipeline section, the both ends of the aditus laryngis pipeline section are connect with the import pipeline section and the outlet pipe section respectively, the high pressure pressure
Mouth, the low pressure pressure tappings and the aditus laryngis pressure pipe are set in the import pipeline section.
3. Venturi meter according to claim 2, which is characterized in that the import pipeline section and the outlet pipe section
It is respectively arranged with interconnecting piece towards the end of the aditus laryngis pipeline section, the both ends of the aditus laryngis pipeline section are respectively arranged with auxiliary section, institute
State the auxiliary section at the both ends of aditus laryngis pipeline section respectively with the connection on the interconnecting piece and the aditus laryngis pipeline section on the import pipeline section
Portion is mating.
4. Venturi meter according to claim 3, which is characterized in that the interconnecting piece is annular slot, described to match
Conjunction portion is annular plug.
5. Venturi meter according to any one of claims 1-4, which is characterized in that the aditus laryngis pressure pipe is in L
Shape, and the first end of the aditus laryngis pressure pipe and the low pressure pressure tappings are coaxially disposed, second end and the aditus laryngis pipeline section are coaxial
Setting.
6. Venturi meter according to any one of claims 1-4, which is characterized in that the contraction of the aditus laryngis pipeline section
It is connected smoothly between section, aditus laryngis and diffuser and constitutes hourglass-shaped channel.
7. Venturi meter according to claim 6, which is characterized in that the second end of the aditus laryngis pressure pipe is in water droplet
Shape structure, and the small end of the water-drop-shaped structure is towards the aditus laryngis pipeline section.
8. Venturi meter according to claim 7, which is characterized in that each section appearance on the aditus laryngis pressure pipe
Rounding off connects between face.
9. Venturi meter described in -4 and 7-8 any one according to claim 1, which is characterized in that further include that pressure difference passes
Sensor, the high pressure test side of the differential pressure pickup are set to the high pressure pressure tappings, the low pressure detection of the differential pressure pickup
End is set to the low pressure pressure tappings.
10. Venturi meter described in -4 and 7-8 any one according to claim 1, which is characterized in that the aditus laryngis pressure
The minimum dimension of the second end of pipe is less than the aditus laryngis size of the aditus laryngis pipeline section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811600228.9A CN109443460A (en) | 2018-12-26 | 2018-12-26 | A kind of Venturi meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811600228.9A CN109443460A (en) | 2018-12-26 | 2018-12-26 | A kind of Venturi meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109443460A true CN109443460A (en) | 2019-03-08 |
Family
ID=65537586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811600228.9A Pending CN109443460A (en) | 2018-12-26 | 2018-12-26 | A kind of Venturi meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109443460A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413979A (en) * | 2022-03-30 | 2022-04-29 | 潍柴动力股份有限公司 | Venturi tube flow measuring method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB764889A (en) * | 1953-06-15 | 1957-01-02 | Bopp & Reuther Gmbh | An improved flow metering device |
| JPH0875621A (en) * | 1994-08-31 | 1996-03-22 | Tsukasa Sotsuken:Kk | Constant flow rate sampling apparatus using variable cross section critical flow venturi tube using movable venturi tube |
| JPH08159933A (en) * | 1994-11-30 | 1996-06-21 | Tsukasa Sotsuken:Kk | Exhaust-gas distributor using movable venturi tube |
| JPH09218062A (en) * | 1996-02-13 | 1997-08-19 | Tsukasa Sotsuken:Kk | Variable sectional area venturi type flow meter |
| US20010013245A1 (en) * | 1998-07-09 | 2001-08-16 | Honda Giken Kogyo Kabushiki Kaisha | Flow rate detector mechanism with variable venturi and exhaust gas sampling method using the same |
| US6510746B1 (en) * | 1999-07-12 | 2003-01-28 | Ford Global Technologies, Inc. | Gas flow measurement |
| CN101333981A (en) * | 2007-06-29 | 2008-12-31 | 卡特彼勒公司 | Onboard method of determining egr flow rate |
| CN102944271A (en) * | 2012-11-27 | 2013-02-27 | 银川融神威自动化仪表厂(有限公司) | Composite internal and external venturi tube flowmeter |
| DE102014212854A1 (en) * | 2014-07-02 | 2016-01-21 | Robert Bosch Gmbh | Flowmeter |
| CN209570223U (en) * | 2018-12-26 | 2019-11-01 | 潍柴动力股份有限公司 | A kind of Venturi meter |
-
2018
- 2018-12-26 CN CN201811600228.9A patent/CN109443460A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB764889A (en) * | 1953-06-15 | 1957-01-02 | Bopp & Reuther Gmbh | An improved flow metering device |
| JPH0875621A (en) * | 1994-08-31 | 1996-03-22 | Tsukasa Sotsuken:Kk | Constant flow rate sampling apparatus using variable cross section critical flow venturi tube using movable venturi tube |
| JPH08159933A (en) * | 1994-11-30 | 1996-06-21 | Tsukasa Sotsuken:Kk | Exhaust-gas distributor using movable venturi tube |
| JPH09218062A (en) * | 1996-02-13 | 1997-08-19 | Tsukasa Sotsuken:Kk | Variable sectional area venturi type flow meter |
| US20010013245A1 (en) * | 1998-07-09 | 2001-08-16 | Honda Giken Kogyo Kabushiki Kaisha | Flow rate detector mechanism with variable venturi and exhaust gas sampling method using the same |
| US6510746B1 (en) * | 1999-07-12 | 2003-01-28 | Ford Global Technologies, Inc. | Gas flow measurement |
| CN101333981A (en) * | 2007-06-29 | 2008-12-31 | 卡特彼勒公司 | Onboard method of determining egr flow rate |
| CN102944271A (en) * | 2012-11-27 | 2013-02-27 | 银川融神威自动化仪表厂(有限公司) | Composite internal and external venturi tube flowmeter |
| DE102014212854A1 (en) * | 2014-07-02 | 2016-01-21 | Robert Bosch Gmbh | Flowmeter |
| CN209570223U (en) * | 2018-12-26 | 2019-11-01 | 潍柴动力股份有限公司 | A kind of Venturi meter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413979A (en) * | 2022-03-30 | 2022-04-29 | 潍柴动力股份有限公司 | Venturi tube flow measuring method |
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