CN109404171A - The adjusting control mechanism of EGR rate - Google Patents
The adjusting control mechanism of EGR rate Download PDFInfo
- Publication number
- CN109404171A CN109404171A CN201811504140.7A CN201811504140A CN109404171A CN 109404171 A CN109404171 A CN 109404171A CN 201811504140 A CN201811504140 A CN 201811504140A CN 109404171 A CN109404171 A CN 109404171A
- Authority
- CN
- China
- Prior art keywords
- valve nozzle
- inducer
- venturi tube
- inserting paragraph
- egr rate
- 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
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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
-
- 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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/21—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system with EGR valves located at or near the connection to the intake system
-
- 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
- F02M26/52—Systems for actuating EGR valves
- F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
- F02M26/54—Rotary actuators, e.g. step motors
-
- 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
- F02M26/52—Systems for actuating EGR valves
- F02M26/64—Systems for actuating EGR valves the EGR valve being operated together with an intake air throttle
Landscapes
- 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 a kind of adjusting control mechanisms of EGR rate.The adjusting control mechanism of the EGR rate includes: Venturi tube comprising: inducer and outlet section and aditus laryngis, the inducer include: valve nozzle inserting paragraph and import conical section；The inner end of the valve nozzle inserting paragraph offers air intake；Valve nozzle comprising: inducer inserting paragraph, exhaust gas entrance conical section and waste gas outlet section, the inducer inserting paragraph be it is cylindric, be adapted to grafting with what the valve nozzle inserting paragraph of Venturi tube can move left and right；The big opening end of the exhaust gas entrance conical section is connect with inducer inserting paragraph, and osculum end is connect with waste gas outlet section, waste gas outlet section be it is cylindric, be adapted to grafting with the aditus laryngis of Venturi tube；And displacement controller.The adjusting control mechanism of the EGR rate can be realized the function of EGR drainage, and can control translation by the valve nozzle mechanism before Venturi tube, to realize the control of EGR rate.
Description
Technical field
The present invention relates to engine arts, especially with regard to a kind of adjusting control mechanism of EGR rate.
Background technique
With the upgrading of exhaust emissions, diesel engine is more and more to reduce original machine NOx emission using EGR technology, from exhaust whirlpool
It is introduced directly into exhaust gas before wheel and enters engine air inlet tube.In order to control EGR rate, usually also need that EGR control valve is installed.
Meanwhile to reduce control valve operating temperature, also need to increase cooler for recycled exhaust gas reduction exhaust gas temperature.
For large diesel engine since the range of speeds is small, when Matching of Turbocharger, generally reaches relatively good booster effect
Rate.Due to efficiency of turbocharger height, it will cause exhaust gas pressure lower than the pressure in air inlet pipe, cause exhaust gas that can not introduce.For
This problem has principle of the more researcher by Venturi tube at present, is transformed to air inlet pipeline, to realize bigger
Exhaust gas flow installs a section venturi pipeline additional before air inlet pipe, and the most narrow place among Venturi tube introduces exhaust gas.Due to venturi
The inherent characteristics of pipe, since bore sharply reduces at this, air-flow is accelerated, and according to Bernoulli equation, learns that speed is promoted
Will cause pressure reduction, when below pressure reduction to exhaust gas pressure, exhaust gas just can more smoothly enter among air inlet pipeline,
To achieve the purpose that increase EGR rate.For the adjustable of realization EGR rate, need to increase electric control EGR valve on EGR line, due to
EGR exhaust temperature is higher, to reduce valve working temperature, it is also necessary to increase cooler for recycled exhaust gas and carry out water cooling to exhaust gas.
Prior art disadvantage:
1, components are more, at high cost, need the higher cost of EGR valve and cooler for recycled exhaust gas.
2, EGR valve reliability is low, if exhaust gas temperature is low after cooler for recycled exhaust gas, is easy that coke granule is made to be readily adsorbed in EGR
On control valve, valve blockage or the failure that can not be closed will cause；If exhaust gas temperature is high after cooler for recycled exhaust gas, EGR valve heat fatigue
It can reduce the service life.Therefore, the failure rate of EGR valve always is higher.
3, for Part load, Venturi tube is used only, still can not improve EGR rate, it is also necessary to cooperate intake-air throttle valve,
Suction press is reduced, can be only achieved enough EGR rates, increases the application of an air throttle again at this time.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
When being considered as recognizing or imply that the information constitutes the prior art already known to those of ordinary skill in the art in any form.
Summary of the invention
The purpose of the present invention is to provide a kind of adjusting control mechanism of simple and reasonable EGR rate, the tune of the EGR rate
Control mechanism is saved by placing valve nozzle mechanism before Venturi tube, realizes the function of EGR drainage, and pass through the valve before Venturi tube
Nozzle mechanism can control translation, to realize the control of EGR rate.
To achieve the above object, the present invention provides a kind of adjusting control mechanisms of EGR rate, comprising: Venturi tube, packet
Include: inducer and outlet section, and connect the aditus laryngis of the inducer and outlet section, the inducer include: valve nozzle inserting paragraph and into
Mouthful conical section, valve nozzle inserting paragraph be it is cylindric, inner end is connected to by import conical section with one end of aditus laryngis；The other end of aditus laryngis
It is connected to outlet section；The inner end of the valve nozzle inserting paragraph offers air intake；Valve nozzle comprising: inducer inserting paragraph, exhaust gas
Entrance conical section and waste gas outlet section, the inducer inserting paragraph be it is cylindric, can be left with the valve nozzle inserting paragraph of Venturi tube
The outer end of the adaptation grafting moved right, inducer inserting paragraph is exhaust gas entrance, and exhaust gas enters valve nozzle by exhaust gas entrance；The exhaust gas
The big opening end of entrance conical section is connect with inducer inserting paragraph, and osculum end is connect with waste gas outlet section, and waste gas outlet section is cylinder
Shape is adapted to grafting with the aditus laryngis of Venturi tube；And displacement controller, it is horizontal in Venturi tube that the valve nozzle can be controlled
Relative displacement on direction.
In a preferred embodiment, air intake is provided with inlet suction port.
In a preferred embodiment, Venturi tube and valve nozzle are all made of metal material.
In a preferred embodiment, Venturi tube and valve nozzle are all made of steel material.
In a preferred embodiment, displacement controller is stepper motor.
Compared with prior art, the adjusting control mechanism of EGR rate according to the present invention has the following beneficial effects:
1, the positional relationship of valve nozzle mechanism and Venturi tube mechanism is realized by placing valve nozzle mechanism before Venturi tube
The function of EGR drainage；Part is simplified, does not need to cool down EGR exhaust, air inlet pipe can be introduced directly into.
2, the valve nozzle mechanism before Venturi tube can control translation, to realize the control of EGR rate.
3, air throttle function is integrated, EGR rate can be further increased.
4, design of part is simple, and failure risk is small, improves use reliability and service life, high reliablity are easy to implement
Control, and control accuracy difference will not be led to due to using the time elongated.And the device can be dismantled integrally in external engine
And installation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the adjusting control mechanism of the EGR rate of first embodiment according to the present invention.
Fig. 2 is the schematic cross-sectional view of the adjusting control mechanism of the EGR rate of second embodiment according to the present invention.
Fig. 3 is the valve nozzle structural schematic diagram of the adjusting control mechanism of the EGR rate of first embodiment according to the present invention.
Fig. 4 is the valve nozzle schematic cross-sectional view of the adjusting control mechanism of the EGR rate of second embodiment according to the present invention.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in detail, it is to be understood that guarantor of the invention
Shield range is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
As depicted in figs. 1 and 2, the adjusting control mechanism of EGR rate according to the preferred embodiment of the invention includes: Venturi tube
1, valve nozzle 2 and displacement controller (not shown), wherein Venturi tube 1 enters from its air intake introduces fresh air, enters
Venturi tube, to generate Venturi effect.What valve nozzle 2 can move left and right is laid in the inducer of Venturi tube 1, main to use
In introducing exhaust gas, displacement controller can control the displacement in 2 horizontal direction of valve nozzle, to realize the adjusting of EGR rate.Dress
It is simple to set structure, high reliablity, in order to subtract number of components as far as possible, reduce cost and easy to disassemble.
Specifically, Venturi tube 1 includes: inducer and outlet section, and connects the aditus laryngis of the inducer and outlet section,
Aditus laryngis is the most narrow place among Venturi tube.Inducer includes: valve nozzle inserting paragraph and import conical section, and valve nozzle inserting paragraph is cylinder
Shape, inner end are connected to by import conical section with one end of aditus laryngis；The other end of aditus laryngis is connected to outlet section.Valve nozzle inserting paragraph
Inner end offers air intake 3, and fresh air enters Venturi tube 1 from air intake 3, due to the inherent characteristics of Venturi tube,
Since bore sharply reduces at aditus laryngis, air-flow is accelerated, and according to Bernoulli equation, learns that speed promotion will cause pressure drop
Low, so that generating Venturi effect after air enters Venturi tube, exhaust gas can enter air inlet pipe with lower pressure.
Preferably, air intake 3 is provided with inlet suction port.
As shown in Figure 3 and Figure 4, valve nozzle 2 includes: inducer inserting paragraph, exhaust gas entrance conical section and waste gas outlet section,
In, inducer inserting paragraph be it is cylindric, be adapted to grafting, inducer with what the valve nozzle inserting paragraph of Venturi tube 1 can move left and right
The outer end of inserting paragraph is exhaust gas entrance, and exhaust gas enters valve nozzle 2 by exhaust gas entrance.The big opening end and inducer of exhaust gas entrance conical section
Inserting paragraph connection, osculum end connect with waste gas outlet section, waste gas outlet section be it is cylindric, be adapted to the aditus laryngis of Venturi tube 1 slotting
It connects, by the forward movement of valve nozzle, the depth of the aditus laryngis of the waste gas outlet section insertion Venturi tube 1 of valve nozzle 2 can be increased, in turn
The effect of shutting off of control Venturi tube further decreases the pressure in the middle part of Venturi tube to realize that air inlet is shut off, to introduce
More exhaust gas, to realize the function of similar current restrictor of diesel engine.Pass through moving backward for valve nozzle, it is possible to reduce valve nozzle
The depth of the aditus laryngis of 2 waste gas outlet section insertion Venturi tube 1, and then the pressure in valve nozzle exit is improved, to reduce introducing
Exhausted air quantity.
Preferably, Venturi tube 1 and valve nozzle 2 are all made of metal material.
Displacement controller can control relative displacement of the valve nozzle 2 in Venturi tube 1 in horizontal direction, to realize EGR
The adjusting of rate.Due to high-speed air air inlet aditus laryngis, air-flow accelerates, and makes pressure reduction in the middle part of aditus laryngis, and shape adds whirlpool, drive exhaust gas from
Intermediate tubule enters, and obtains highly uniform mixing with fresh air.By regulating valve mouth position, air inlet aditus laryngis can control
Air velocity, thus control exhaust gas introducing amount.
Preferably, displacement controller is stepper motor.
The specific embodiment of the adjusting control mechanism of the EGR rate:
1, after air enters Venturi tube by air intake 3, Venturi effect is generated, exhaust gas can be with lower pressure
Into air inlet pipe.
2, by the forward movement of valve nozzle 2, it can control the effect of shutting off of Venturi tube, thus realize that air inlet is shut off, into
One step reduces the pressure in the middle part of Venturi tube, so that more exhaust gas are introduced, to realize similar current restrictor of diesel engine
Function.
3, moving backward by valve nozzle 2 improves the pressure in valve nozzle exit, to reduce the exhausted air quantity of introducing.
To sum up, the adjusting control mechanism of the EGR rate realizes EGR drainage by placing valve nozzle mechanism before Venturi tube
Function, and translation can be controlled by the valve nozzle mechanism before Venturi tube, to realize the control of EGR rate.
The aforementioned description to specific exemplary embodiment of the invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (5)
1. a kind of adjusting control mechanism of EGR rate characterized by comprising
Venturi tube comprising: inducer and outlet section, and the aditus laryngis of the inducer and outlet section is connected, the inducer packet
Include: valve nozzle inserting paragraph and import conical section, valve nozzle inserting paragraph are one end cylindric, that inner end passes through import conical section and aditus laryngis
Connection；The other end of aditus laryngis is connected to outlet section；The inner end of the valve nozzle inserting paragraph offers air intake；
Valve nozzle comprising: inducer inserting paragraph, exhaust gas entrance conical section and waste gas outlet section, the inducer inserting paragraph are circle
Column is adapted to grafting with what the valve nozzle inserting paragraph of Venturi tube can move left and right, and the outer end of inducer inserting paragraph enters for exhaust gas
Mouthful, exhaust gas enters valve nozzle by exhaust gas entrance；The big opening end of the exhaust gas entrance conical section is connect with inducer inserting paragraph, osculum end
Connect with waste gas outlet section, waste gas outlet section be it is cylindric, be adapted to grafting with the aditus laryngis of Venturi tube；And
Displacement controller can control relative displacement of the valve nozzle in Venturi tube in horizontal direction.
2. the adjusting control mechanism of EGR rate as described in claim 1, which is characterized in that the air intake is provided with air inlet
Connector.
3. the adjusting control mechanism of EGR rate as described in claim 1, which is characterized in that the Venturi tube and valve nozzle are adopted
Use metal material.
4. the adjusting control mechanism of EGR rate as claimed in claim 3, which is characterized in that the Venturi tube and valve nozzle are adopted
Use steel material.
5. the adjusting control mechanism of EGR rate as described in claim 1, which is characterized in that the displacement controller is stepping electricity
Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811504140.7A CN109404171A (en) | 2018-12-10 | 2018-12-10 | The adjusting control mechanism of EGR rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811504140.7A CN109404171A (en) | 2018-12-10 | 2018-12-10 | The adjusting control mechanism of EGR rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109404171A true CN109404171A (en) | 2019-03-01 |
Family
ID=65458162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811504140.7A Pending CN109404171A (en) | 2018-12-10 | 2018-12-10 | The adjusting control mechanism of EGR rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109404171A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798205A (en) * | 2019-04-11 | 2019-05-24 | 潍柴动力股份有限公司 | EGR mixer and engine with it |
| CN110541778A (en) * | 2019-09-18 | 2019-12-06 | 广西玉柴机器股份有限公司 | Two segmentation venturi of integrated EGR disk seats |
| CN115977837A (en) * | 2023-03-17 | 2023-04-18 | 潍柴动力股份有限公司 | Vehicle exhaust gas recirculation line and method of designing a vehicle exhaust gas recirculation line |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08326609A (en) * | 1995-05-31 | 1996-12-10 | Isuzu Motors Ltd | Egr device for internal combustion engine |
| US20040168508A1 (en) * | 2003-02-28 | 2004-09-02 | Cummins Inc. | Exhaust gas recirculation measurement device |
| US6886544B1 (en) * | 2004-03-03 | 2005-05-03 | Caterpillar Inc | Exhaust gas venturi injector for an exhaust gas recirculation system |
| WO2006126963A1 (en) * | 2005-05-24 | 2006-11-30 | Scania Cv Ab (Publ) | Apparatus for recirculation of exhaust gases in a combustion engine |
| CN101218427B (en) * | 2005-07-28 | 2012-01-04 | 哈尔德克斯水利学公司 | Sequential control valve |
| CN204476603U (en) * | 2015-02-06 | 2015-07-15 | 西华大学 | For the fluidic device of engine exhaust gas recirculation |
| CN108266280A (en) * | 2018-03-07 | 2018-07-10 | 吉林大学 | A kind of EGR rate self-checking device of engine transient loading procedure |
| CN209067379U (en) * | 2018-12-10 | 2019-07-05 | 广西玉柴机器股份有限公司 | The adjusting control mechanism of EGR rate |
-
2018
- 2018-12-10 CN CN201811504140.7A patent/CN109404171A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08326609A (en) * | 1995-05-31 | 1996-12-10 | Isuzu Motors Ltd | Egr device for internal combustion engine |
| US20040168508A1 (en) * | 2003-02-28 | 2004-09-02 | Cummins Inc. | Exhaust gas recirculation measurement device |
| US6886544B1 (en) * | 2004-03-03 | 2005-05-03 | Caterpillar Inc | Exhaust gas venturi injector for an exhaust gas recirculation system |
| WO2006126963A1 (en) * | 2005-05-24 | 2006-11-30 | Scania Cv Ab (Publ) | Apparatus for recirculation of exhaust gases in a combustion engine |
| CN101218427B (en) * | 2005-07-28 | 2012-01-04 | 哈尔德克斯水利学公司 | Sequential control valve |
| CN204476603U (en) * | 2015-02-06 | 2015-07-15 | 西华大学 | For the fluidic device of engine exhaust gas recirculation |
| CN108266280A (en) * | 2018-03-07 | 2018-07-10 | 吉林大学 | A kind of EGR rate self-checking device of engine transient loading procedure |
| CN209067379U (en) * | 2018-12-10 | 2019-07-05 | 广西玉柴机器股份有限公司 | The adjusting control mechanism of EGR rate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798205A (en) * | 2019-04-11 | 2019-05-24 | 潍柴动力股份有限公司 | EGR mixer and engine with it |
| CN109798205B (en) * | 2019-04-11 | 2024-01-12 | 潍柴动力股份有限公司 | EGR (exhaust gas recirculation) mixer and engine with same |
| CN110541778A (en) * | 2019-09-18 | 2019-12-06 | 广西玉柴机器股份有限公司 | Two segmentation venturi of integrated EGR disk seats |
| CN115977837A (en) * | 2023-03-17 | 2023-04-18 | 潍柴动力股份有限公司 | Vehicle exhaust gas recirculation line and method of designing a vehicle exhaust gas recirculation line |
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Application publication date: 20190301 |
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