CN107420224A - A kind of integrated form with piezo actuator intersects annular groove gaseous fuel jet mixing device - Google Patents
A kind of integrated form with piezo actuator intersects annular groove gaseous fuel jet mixing device Download PDFInfo
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- CN107420224A CN107420224A CN201710504572.7A CN201710504572A CN107420224A CN 107420224 A CN107420224 A CN 107420224A CN 201710504572 A CN201710504572 A CN 201710504572A CN 107420224 A CN107420224 A CN 107420224A
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- valve
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- annular groove
- valve element
- piston
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- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
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- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0251—Details of actuators therefor
- F02M21/0254—Electric actuators, e.g. solenoid or piezoelectric
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- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
- F02M21/026—Lift valves, i.e. stem operated valves
- F02M21/0269—Outwardly opening valves, e.g. poppet valves
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- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0278—Port fuel injectors for single or multipoint injection into the air intake system
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- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/04—Gas-air mixing apparatus
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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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
It is an object of the invention to provide a kind of integrated form with piezo actuator to intersect annular groove gaseous fuel jet mixing device, gaseous fuel is transported to the system by the road, Fuelinjection nozzle is first passed through, actuator is by controlling the control to valve element to realize the control being opened and closed to valve；The stability of valve opening and closing, the response that strengthening system is supplied and died can be ensured by guide finger, pressure compensation opening, relief groove and pressure stabilizing cavity；By the mixed admission mode of the main direct air inlet of air drain in axial direction and circumferential tonifying Qi gas inlet hole in valve, big flow is realized, while air-flow can be avoided to interfere, realizes that system supplies stability；By fuel anemostat cavity structure, make fuel energy distribution in the entire system, realize the continuity and response of air supply system supply；By branch pipe flume structure, the gaseous fuel of ejection is formed vortex, promote the mixability of fuel and air, be advantageous to burn, improve system service behaviour.
Description
Technical field
The present invention relates to a kind of fuel injection mixing arrangement, specifically gas engine fuel injection mixing dress
Put.
Background technology
Internal combustion engine is continuously increased to the consumption of the energy, and also getting worse, natural gas are sent out for pollution of the emission to environment
Motivation is with its good economy, relatively low NOx and granular material discharged has obtained the concern of people.Therefore permitted headed by natural gas
Multiple gas fuel becomes the research emphasis of domestic and international many researchers, gaseous fuel hair as the alternative fuel of engine
Motivation also becomes widely studied object.Performance of each part that fuel and air flow through for gaseous propellant engine
Significant thus gas handling system largely affects the fuel of natural gas engine and being well mixed for air
Degree, then influence the combustion stability of natural gas engine.Complete set gas handling system is included from Fuelinjection nozzle to air inlet
Manifold arrives many parts such as cylinder valve again.Require that injection flow is big, ejection efficiency for gaseous fuel is identical with liquid fuel
Height, while the flowing of the aerobic fluid fuel of jetting stability, response and air is also required, it is different from liquid fuel for gaseous fuel
Also need to make gaseous fuel and air sufficiently to be mixed before cylinder is entered, to improve fuel economy section
About energy resource consumption.
The content of the invention
It is an object of the invention to provide a kind of band piezo actuator that fuel supply response is fast, stability is high, flow is big
Integrated form intersect annular groove gaseous fuel jet mixing device.
The object of the present invention is achieved like this：
A kind of integrated form with piezo actuator of the present invention intersects annular groove gaseous fuel jet mixing device, it is characterized in that：
Including Fuelinjection nozzle, gas hood, fuel anemostat；
The Fuelinjection nozzle includes valve body, valve seat, valve rod, piezo-electric crystal, fluid power amplifier, dividing plate, valve element assembly,
Valve body is fixedly arranged above fixed block, and straight trough is provided with the middle part of fixed block, and piezo-electric crystal is arranged in straight trough, and valve body is fixed on valve seat
On, dividing plate is set in valve body, and fluid power amplifier is set above dividing plate, and valve element assembly is arranged on below dividing plate, below dividing plate
Valve space is formed between valve body and valve seat, the fluid power amplifier includes big piston, valve piston, sleeve, and sleeve is arranged on dividing plate
On, the center of sleeve upper end is thick outlet, and the end of sleeve upper end is thin outlet, and big piston is arranged in thick outlet, valve piston
Be arranged in thin outlet, big piston support spring be set between the flange and sleeve of big piston, the flange and sleeve of valve piston it
Between valve piston support spring is set, filled with hydraulic oil, big piston upper surface and piezo crystals in the sleeve below big piston, valve piston
Body lower surface is fit together, and big piston exterior sets circle ring disk, and valve piston upper surface is bonded with circle ring disk lower surface, circle ring disk
With groove is respectively provided with fixed block, the both ends of back-moving spring are arranged in the groove of circle ring disk and fixed block, described valve
Core assembly includes armature, spring base, bottom plate, valve element, and armature, bottom plate, valve element are arranged while pass through fastening bolt from top to bottom
Link together, spring base is located at outside armature and annular groove is formed between armature, and dividing plate lower surface sets annular groove, resets
The both ends of spring are arranged in the annular groove of dividing plate and the annular groove of spring base, and pressure compensation opening is set at armature center,
Relief groove is set on bottom plate, and valve element is hollow structure, and center pressure stabilizing cavity, the outer end of valve seat are set on the valve seat below valve element
End pressure stabilizing cavity is set, and pressure compensation opening, relief groove, the hollow space of valve element and center pressure stabilizing cavity are communicated and formed interior
Portion space, seal band is set on valve element, and seal band forms air inlet ring cavity, sets outlet annulus and guide pad on valve seat, lead
It is located to block around valve element, outlet annulus is located at below air inlet ring cavity, and the lower section of outlet annulus sets gas outlet, is set on dividing plate
Through hole, the middle part of valve rod pass through through hole, and the top of valve rod is connected with circle ring disk, and the lower section of valve rod is fixed on by jump ring and armature
Together；
The head end of gas hood is arranged on below gas outlet, the end connection fuel anemostat of gas hood, fuel anemostat be located at into
In gas manifold, tracheae annular groove is set on fuel anemostat, tracheae annular groove includes first kind tracheae annular groove and the second class tracheae annular groove,
The diameter of fuel anemostat alternately changes in step, and first kind tracheae annular groove is located at the relatively small position of fuel diffuser pipe diameter
On, the second class tracheae annular groove is located on the relatively large position of fuel diffuser pipe diameter, and first kind tracheae annular groove and the second class gas
Pipe ring groove each circumferentially arrangement and in 90 ° is staggeredly arranged mutually.
The present invention can also include：
1st, gas hood is convergent nozzle, and the head end area of section of gas hood is more than its tail end section area, the head end of gas hood and end
Hold two end section axis mutually in 90 °.
The 2nd, extension is set on valve body, extension sets air inlet, and diversion cavity is set in the valve body below air inlet,
Air inlet, diversion cavity are communicated and form exterior space, and exterior space communicates with inner space, and axial admission hole is set on valve element；
Combustion gas vertically flows into diversion cavity through air inlet, and a part of combustion gas is flowed into the center voltage stabilizing of inner space and valve seat
Chamber, remaining combustion gas are flowed into above valve element, and a part of combustion gas stream is through axial air admission hole, full of the air inlet ring cavity on valve element, another portion
Combustion gas is divided to flow into the end pressure stabilizing cavity of valve seat outer end；
When piezo-electric crystal is not powered on, the upper surface of seal band and valve seat on valve element is fitted close, and combustion gas is full of combustion gas
The exterior space of the valve inner of injection valve and inner space；Piezo-electric crystal be powered after, piezo-electric crystal by current excitation so as to
Elongation, promote big piston to move downward, the hydraulic oil in sleeve is compressed, in the presence of hydraulic fluid pressure, valve piston to
Upper motion, valve rod also move upwards, and under the fixation of jump ring, band movable valve plug assembly moves upwards, until in sleeve
Hydraulic fluid pressure returns to original state, and valve piston no longer moves, and valve element assembly stops therewith, and combustion gas is entered by the axial direction on valve element
Stomata flows into, and by air inlet ring cavity, the space between valve element and valve seat, intake elbow is vertically flowed into after being oriented to by gas outlet
And tracheae, enter inlet manifold from the end of tracheae, first kind tracheae annular groove, the second class tracheae annular groove；After piezo-electric crystal power-off,
Piezo-electric crystal shortens, and in the presence of big piston support spring, big piston returns to initial position, in sleeve under hydraulic fluid pressure
Drop, in the presence of back-moving spring, circle ring disk, valve piston move downward, and valve rod, valve element assembly move downward therewith, until
Hydraulic fluid pressure returns to original state in sleeve, and big piston, valve piston return to initial position, and valve element assembly returns to initial bit
Put, spool face is bonded with valve base surface, and fuel gas injection valve is closed, and gas circuit is closed.
Advantage of the invention is that：The present invention by valve the axially main direct air inlet of air drain and circumferential tonifying Qi gas inlet hole it is mixed
Intake method is closed, realizes big flow, while air-flow can be avoided to interfere, realizes that system supplies stability；Pass through fuel anemostat
Cavity structure, make fuel energy distribution in the entire system, realize the continuity and response of air supply system supply；It is oblique by branch pipe
Slot structure, the gaseous fuel of ejection is formed vortex, promote the mixability of fuel and air, be advantageous to burn, improve system
Service behaviour.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is Fuelinjection nozzle general illustration；
Fig. 3 is valve element assembly schematic diagram；
Fig. 4 is fuel anemostat outside drawing；
Fig. 5 a are B-B views, and Fig. 5 b are C-C views；
Fig. 6 is the flow graph of gaseous fuel.
Embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail：
With reference to Fig. 1-6, a kind of integrated form with piezo actuator in the present invention intersects the injection mixing of annular groove gaseous fuel
Device, it is divided into Fuelinjection nozzle 1, connection gas hood 2 and fuel anemostat 3.Fuelinjection nozzle 1 is mainly by fixed block 4, piezo-electric crystal
5th, valve body 6, back-moving spring 7, big piston 8, big piston support spring 9, sealing ring 10, sleeve 11, O-ring seal 12, O-ring seal
13rd, pressure stabilizing cavity 14, bolt 15, O-ring seal 16, circle ring disk 17, valve rod 18, valve piston support spring 19, valve piston 20,
Hydraulic oil 21, dividing plate 22, jump ring 23, valve element assembly 24, guide pad 25, outlet annulus 26, valve seat 27, armature 28, spring base
29th, bottom plate 30, valve element 31, seal band 32, pressure compensation opening 33, armature back-moving spring 34, pad 35, relief groove 36,
Fastening bolt 37 is formed, and valve body 6 is a cuboid, and the air inlet 38 and diversion cavity 39 of combustion gas are being provided with close to its center one end,
The hole of certain depth is provided with vertically in the other end close to the center of valve body 6, be separated among holes certain depth every
Plate 21, the hole space of the lower section of dividing plate 22 are connected with diversion cavity 39, and it is connected by fixed block 4 using bolt 15 with valve body 6
Together, the center for making its own be fixed on the upper aperture top of dividing plate 22, the mating surface between fixed block 4 and valve body 7
On keep sealing by O-ring seal 16, fixed block 4 is provided with the straight trough of certain depth in center, and piezo-electric crystal 5 is arranged
Wherein, the less through hole of a diameter is provided with above straight trough, for arranging connecing for piezo-electric crystal 5 and the outer control unit of valve body 6
Electric wire, the lower surface of piezo-electric crystal 5 are in contact with the big upper surface of piston 8, under the pretightning force effect of big piston support spring 9, pressure
Together with the lower surface of electric crystal 5 is brought into close contact with the big upper surface of piston 8, the upper end of sleeve 11 is multiple exit, and central outlet is slightly to go out
Mouthful, outlet around is thin outlet, is arranged symmetrically in the lower section of circle ring disk 17, and lower end is the closing chamber of a connection, under big piston 8
End is arranged in the thick outlet at the center of sleeve 11, and big piston support spring 9 ensures between the big flange of piston 8 and sleeve 11
Big piston 8 integrally will not enter in sleeve 11, and the hydraulic oil 21 with certain pressure is filled with sleeve 11, the both ends of sleeve 11
Thin outlet top is disposed with valve piston 20, and the lower end of valve piston 20 is arranged therein, the cloth between the flange of valve piston 20 and sleeve 11
Valve piston support spring 19 is equipped with, to ensure that valve piston 20 integrally will not enter in sleeve 11, big piston 8, the side table of valve piston 20
Sealing ring 10 is disposed between face and the inwall of sleeve 11, to prevent the leakage of hydraulic oil 21 in sleeve 11, big piston 8, valve piston
20th, big piston support spring 9, valve piston support spring 19 have together constituted with the fluid power amplifier of piezo-electric crystal, liquid with sleeve 11
Power amplifier in the top of the median septum 22 of valve body 6, acts on as an integral arrangement in the pretightning force of valve piston support spring 19
Under, the upper surface of valve piston 20 is brought into close contact with the lower surface of circle ring disk 17, the both ends of back-moving spring 7 be arranged in fixed block 1 with
In groove on circle ring disk 17, the both ends of circle ring disk 17 are provided with circular hole, and screw thread is provided with hole, using screw thread by circle ring disk 17 and valve
Bar 18 is linked together, and valve rod 18 is arranged in the through hole in dividing plate 21, and its lower end is using on jump ring 23 and valve element assembly 24
End is fixed together, and has been sequentially arranged valve element assembly 24, valve seat 27, valve seat 27 and valve body 6 from top to bottom below dividing plate 22
Between be bolted to connection together, mating surface therebetween realizes sealing by O-ring seal 13, and valve seat 27 exists
Both ends are provided with pressure stabilizing cavity 14, the pressure stabilizing cavity 14 and valve element of the center of valve seat 27 at center and close seal band 29
Combustion gas space inside assembly 24 is connected, and the pressure stabilizing cavity 14 at the both ends of valve seat 27 is connected with the inner space of valve body 7.Gas hood
2 effect is original mixed airway being divided into two parts, distinguishes circulated gases fuel and air, gas hood use big circle
Corner structure, avoid restriction loss caused by angular structures, strengthening system gas supply capacity.The one end of gas hood 2 exports with Fuelinjection nozzle 1
Close connection, the other end are then closely connected with fuel anemostat 3, and fuel sprays from Fuelinjection nozzle 1 enters anemostat through gas hood 2
3.For fuel anemostat 3 when the armature adhesive of fuel gas injection valve 1, combustion gas enters the bending section of air pipe structure from fuel gas injection valve 1
38, the diameter of tracheae bending section 38 is gradually reduced, so this bending tracheae effect is similar to convergent nozzle, so as to through combustion
The combustion gas that gas jet valve 1 ejects enters the straight section 40 of air pipe structure after the acceleration of convergent nozzle, now combustion gas stream
Speed is higher, and tracheae straight section be provided with circumferentially and also mutual annular groove 40a and 40b in 90 °, combustion gas pass through annular groove
Flow into inlet manifold, after air inlet tear and turbulent flow, and the air blending in manifold, improve air mass.Tracheae
The motor intake manifold 41 of outside sucks air simultaneously, and passes through after the combustion gas turbulent closure scheme that annular groove 40a and 40b spray,
Mixed effect is more uniform, while the end of tracheae straight section 40 improves air inlet response, so as to significantly close to engine intake valve
Reduce combustion gas remaining in air intake duct.Figure three is that valve element assembly 24 is located among valve body 6 by armature 28, spring base 29, bottom plate
30th, valve element 31, armature back-moving spring 34, pad 35 and fastening bolt 37 form, armature 28 by fastening bolt 37 and bottom plate 30,
Valve element 31 is linked together, and one layer of pad 35 is disposed between armature 28 and bottom plate 30, pressure compensation opening 33 is provided with armature 28,
The top of bottom plate 30 is provided with four relief grooves 36, and the pressure compensation opening 33 at the center of armature 28 coordinates the pressure on bottom plate 30 to put down
Weighing apparatus groove 36 causes the inner space of valve element assembly 24 to be connected with exterior space, and inside and outside gas circuit reaches balance, valve element assembly 24
Inside and outside combustion gas no pressure is poor, and the top of bottom plate 30 is arranged on by extra axial force, spring base 29 when avoiding from motion,
Its internal side surface is in contact with the side surface of armature 28, and the both ends of armature back-moving spring 34 are arranged in dividing plate 22 and bullet
On the annular groove of spring abutment 29, valve element 31 is made up of valve element main body, seal band 32, and its circumferentially fixed four on valve seat 27 leads
To on block, ensure itself perpendicularity, the integral arrangement of valve element assembly 24 is below dividing plate 23.In the fuel gas injection valve course of work,
When piezo-electric crystal 2 is not powered on, in the presence of armature back-moving spring 31, valve element assembly 21 maintains motionless, valve in initial position
The upper surface of the seal band 29 and valve seat 24 on valve element 28 in core assembly 21 is fitted close, the air inlet ring cavity on valve element 28
38 do not connect with the ring cavity on valve seat 24 near outlet annulus 23, the whole sky inside valve body 3 of the combustion gas full of fuel gas injection valve
Between.After piezo-electric crystal 2 is powered, piezo-electric crystal 2, so as to extend, is promoted big piston 5 to move downward, in sleeve 8 by current excitation
Hydraulic oil 18 compressed, pressure rise, in the presence of the pressure of hydraulic oil 18, the valve piston 17 in sleeve 8 in thin outlet
Motion, valve piston 17 are symmetrically distributed in the lower section of circle ring disk 14 upwards, smoothly promote circle ring disk 14 to move upwards, due to screw thread
Connection function, the also motion upwards of valve rod 15, finally under the fixation of jump ring 20, band movable valve plug assembly 21 is transported upwards
It is dynamic, in the motion process of valve element assembly 21, outer guiding is realized by guide pad 22, until the hydraulic oil 18 in sleeve 8 is pressed
Power returns to original state, and valve piston 17 no longer moves, and valve element assembly 21 stops therewith, and valve element assembly 21 maintains in the position
For a period of time, combustion gas is flowed into by the axial admission hole 37 on valve element 28, by having certain depth around multiple-sealed annulus 29
Air inlet ring cavity 38, via the space between valve element 28 and valve seat 24, vertically flowed out after being finally oriented to via gas outlet 39, valve element
Multiple tracks annulus, face sealing, voltage stabilizing balance are used between 28 and valve seat 24, and wider annulus area can reduce impact, and raising can
By property, combustion gas of the valve seat 24 around the pressure stabilizing cavity 11 set close to the both ends of air inlet ring cavity 38 and its center opening position causes
Ventilated in flow process uniform, air pressure balance；After combustion gas ejection is a certain amount of, piezo-electric crystal 2 starts to power off, and piezo-electric crystal 2 contracts
Short, in the presence of big piston support spring 6, big piston 5 begins to return to initial position, and the pressure of hydraulic oil 18 declines in sleeve 8,
In the presence of back-moving spring 4, circle ring disk 14, valve piston 17 start to move downward, and valve rod 15, valve element assembly 21 are downward therewith
Motion, until the pressure of hydraulic oil 18 returns to original state in sleeve 8, big piston 5, valve piston 17 return to initial position, now valve
Core assembly 21 is also corresponding to return to initial position, and the surface of valve element 28 is bonded with the surface of valve seat 24, comes back to initial position, combustion
Gas jet valve is closed, and gas circuit is closed.
When the armature adhesive of fuel gas injection valve 1, combustion gas enters the bending section 38 of air pipe structure, gas from fuel gas injection valve 1
The diameter of pipe bending section 38 is gradually reduced, so this bending tracheae effect is similar to convergent nozzle, so as to through gas injection
Penetrate the straight section 40 that combustion gas that valve 1 ejects enters air pipe structure after the acceleration of convergent nozzle, now gas flow rate compared with
Height, and tracheae straight section be provided with circumferentially and also mutual annular groove 40a and 40b in 90 °, combustion gas is by annular groove inflow
In inlet manifold, after air inlet tear and turbulent flow, and the air blending in manifold, improve air mass.
Motor intake manifold 41 outside tracheae sucks air, and the combustion gas rapids sprayed by annular groove 40a and 40b simultaneously
After stream mixing, mixed effect is more uniform, while the end of tracheae straight section 40 improves air inlet response close to engine intake valve
Property, so as to substantially reduce combustion gas remaining in air intake duct.
A kind of integrated form with piezo actuator in the present invention intersects annular groove gaseous fuel jet mixing device, is divided into combustion
Expect injection valve, connection gas hood and fuel anemostat.Fuelinjection nozzle mainly by fixed block, piezo-electric crystal, valve body, back-moving spring,
Big piston, big piston support spring, sealing ring, sleeve, O-ring seal, bolt, circle ring disk, valve rod, valve piston support bullet
Spring, valve piston, jump ring, valve element assembly and valve seat.Valve element assembly resets bullet by armature, spring base, bottom plate, valve element, armature
Spring, pad and fastening bolt composition.The present invention in the course of the work, is powered using piezo-electric crystal and extended, via fluid power amplifier
After displacement enlargement, the valve piston being arranged symmetrically promotes circle ring disk smoothly to move upwards, and circle ring disk passes through valve rod band movable valve plug group
Fit overall motion of being lifted off a seat under the outer guide effect of the guide pad in outside, realize the function of gas valve jet；The present invention
By the way of piezo-electric crystal driving, the response speed of fuel gas injection valve is effectively increased, passes through the different electric current of piezo-electric crystal
Type of drive, the lift for realizing fuel gas injection valve are variable；The present invention is using the plenum system bypassed, to combustion gas in valve body
Flowing is oriented to；Valve element bottom is using seal band and then forms air inlet ring cavity, and combustion gas is entered axially into, on the one hand avoided
Combustion gas interference, it ensure that gas circuit balances, on the other hand alleviate valve seat quality, improve response speed；The present invention uses band
There is the valve seat construction of pressure stabilizing cavity, it can effectively inhibit the fluctuation of gaseous-pressure inside fuel gas injection valve, ensure that gas injection
Penetrate the stability of valve whiff pressure；The present invention is provided with pressure compensation opening at armature, and relief groove is provided with bottom plate,
Promote gas circuit inside and outside valve element assembly to reach balance, ensure that valve element assembly is poor without gaseous-pressure up and down, avoid valve element group
Zoarium further increasing the response speed of fuel gas injection valve, reduce fuel gas injection valve work by extra axial force
Control difficulty.The effect of gas hood is original mixed airway being divided into two parts, difference circulated gases fuel and air.
Gas hood one end is closely connected with fuel injection valve outlet, and the other end is then closely connected with fuel anemostat, and fuel is from fuel injection
Valve sprays enters anemostat through gas hood.A kind of air pipe structure in gas engine inlet manifold, mainly including fuel gas injection valve,
Inlet manifold, adpting flange, air pipe structure.Fuel gas injection valve is connected with air pipe structure using flange, and flange gasket uses resistance to height
The metal jacketed gasket of warm high pressure, to improve the sealing property under various operating modes.When fuel gas injection valve armature adhesive, combustion gas is entered
Enter tracheae, because bending jet pipe is similar to convergent nozzle, so the combustion gas ejected through fuel gas injection valve is by convergent nozzle
Enter the straight section of air pipe structure after acceleration, now gas flow rate is higher, and annular groove mutually in 90 ° is provided with tracheae straight section,
Combustion gas is flowed out by annular groove, is mixed with the air in manifold, and combustion gas and air improve gaseous mixture after turbulent flow tear effect
Uniformity, while tracheae straight section end improves air inlet response, so as to substantially reduce air intake duct close to engine intake valve
Interior remaining combustion gas.The Fuelinjection nozzle is provided with pressure compensation opening at armature, and relief groove is provided with bottom plate,
Promote gas circuit inside and outside valve element assembly to reach balance, ensure that valve element assembly is poor without gaseous-pressure up and down, avoid valve element group
Zoarium further increasing the response speed of fuel gas injection valve, reduce fuel gas injection valve work by extra axial force
Control difficulty.
Valve element assembly and valve seat junction part in fuel injection hair, are interspersed using seal band and outlet annulus
Form carry out face sealing, while big zonary structure can reduce architecture quality, reduce impact, improve system working stability
Property.
The present invention is oriented to using the plenum system of bypass to flowing of the combustion gas in valve body；Apply valve element bottom
Seal band and then air inlet ring cavity being formed, combustion gas enters axially into, and on the one hand avoids combustion gas interference, ensure that gas circuit balances,
On the other hand valve seat quality is alleviated, improves response speed
Gas hood part in the system, its surface texture use larger radius of curvature, avoid more sharp corner angle
Structure, it can so reduce fuel from injection valve through the restriction loss during gas hood penetrating tracheae main part.Chamber is connected,
It is capable of the fluctuation of effective check valve internal gas pressure, improves system job stability, realize system high response speed.
Fuel injection exit passageway part in the system, by main air drain, valve element floor centre bore, seal spool in valve body
Annular groove and valve seat go out compression composition；When Fuelinjection nozzle is closed, closure gasket groove and go out compression interlacing contact,
Sealing surface is formed, prevents fuel from entering inlet manifold；When Fuelinjection nozzle is opened, fuel can enter compression ring from main air drain
Groove, also it can enter compression from the sealed annular groove of floor centre bore；This mixed admission mode, increase charge flow rate coefficient,
The big flow of system is realized, effectively improves the supply efficiency of gas handling system, while air-flow can be avoided to interfere, is realized whole
The supply stability of system.
Gas hood part in the system, its surface texture use larger radius of curvature, avoid more sharp corner angle
Structure, it can so reduce fuel from injection valve through the restriction loss during gas hood penetrating tracheae main part.
Each branch pipe in the system in fuel anemostat, it is evenly arranged in the position of gas manifold tube wall, this
Spline structure design can destroy the boundary layer of air of manifold wall formation in gas circulation, increase the tubulence energy of air flow, with
Strengthen the mixing between fuel and air.
A kind of integrated form ring manifold wall jet combi port system with mixed admission fuel gas injection valve can strengthen
Fuel supplies response, and Fuelinjection nozzle first opens response using guide finger and pressure balance pore structure enhancing valve element；When
Fuelinjection nozzle is opened, and fuel is flowed into dyestuff anemostat through gas hood, is acted on by a series of skewed slots and is flowed into inlet manifold simultaneously
Vortex is formed, is sufficiently mixed with air, is finally flowed into cylinder；All closed in Fuelinjection nozzle and cylinder valve
Afterwards, because fuel and air can be carried out certain isolation by the system, it can will be sprayed from injection valve but fail to enter in time
Enter the gaseous fuel storage of cylinder prevents divergence loss in the cavity of fuel anemostat, treats that next snifting valve and cylinder valve are opened
Qi Hou, the portion gas fuel, which can be promptly supplied in cylinder, to be used to burn, and improves fuel supply response.
Claims (3)
1. a kind of integrated form with piezo actuator intersects annular groove gaseous fuel jet mixing device, it is characterized in that：Including fuel
Injection valve, gas hood, fuel anemostat；
The Fuelinjection nozzle includes valve body, valve seat, valve rod, piezo-electric crystal, fluid power amplifier, dividing plate, valve element assembly, valve body
Fixed block is fixedly arranged above, straight trough is provided with the middle part of fixed block, piezo-electric crystal is arranged in straight trough, and valve body is fixed on valve seat, valve
Dividing plate is set in body, fluid power amplifier is set above dividing plate, and valve element assembly is arranged on below dividing plate, the valve body below dividing plate with
Valve space is formed between valve seat, the fluid power amplifier includes big piston, valve piston, sleeve, and sleeve is arranged on dividing plate, sleeve
The center of upper end is thick outlet, and the end of sleeve upper end is thin outlet, and big piston is arranged in thick outlet, and valve piston is arranged on carefully
In outlet, big piston support spring is set between the flange and sleeve of big piston, set between the flange and sleeve of valve piston small
Piston support spring, filled with hydraulic oil, big piston upper surface and piezo-electric crystal lower surface in the sleeve below big piston, valve piston
Fit together, big piston exterior sets circle ring disk, and valve piston upper surface is bonded with circle ring disk lower surface, circle ring disk and fixed block
In be respectively provided with groove, the both ends of back-moving spring are arranged in the groove of circle ring disk and fixed block, described valve element assembly
Including armature, spring base, bottom plate, valve element, armature, bottom plate, valve element are arranged while are connected to one by fastening bolt from top to bottom
Rising, spring base is located at outside armature and annular groove is formed between armature, dividing plate lower surface setting annular groove, and the two of back-moving spring
End is arranged in the annular groove of dividing plate and the annular groove of spring base, and pressure compensation opening is set at armature center, is set on bottom plate
Put relief groove, valve element is hollow structure, sets center pressure stabilizing cavity on the valve seat below valve element, the outer end of valve seat sets end
Pressure stabilizing cavity, pressure compensation opening, relief groove, the hollow space of valve element and center pressure stabilizing cavity communicate and form inner space,
Seal band is set on valve element, and seal band forms air inlet ring cavity, sets outlet annulus and guide pad, guide pad to be located on valve seat
Around valve element, outlet annulus is located at below air inlet ring cavity, and the lower section of outlet annulus sets gas outlet, and through hole, valve are set on dividing plate
The middle part of bar passes through through hole, and the top of valve rod is connected with circle ring disk, and the lower section of valve rod is fixed together by jump ring and armature；
The head end of gas hood is arranged on below gas outlet, and the end connection fuel anemostat of gas hood, fuel anemostat is located at air inlet discrimination
Guan Li, tracheae annular groove is set on fuel anemostat, and tracheae annular groove includes first kind tracheae annular groove and the second class tracheae annular groove, fuel
The diameter of anemostat alternately changes in step, and first kind tracheae annular groove is located on the relatively small position of fuel diffuser pipe diameter, the
Two class tracheae annular grooves are located on the relatively large position of fuel diffuser pipe diameter, and first kind tracheae annular groove and the second class tracheae annular groove
Each circumferentially arrangement and in 90 ° it is staggeredly arranged mutually.
2. a kind of integrated form with piezo actuator according to claim 1 intersects annular groove gaseous fuel injection mixing dress
Put, it is characterized in that：Gas hood is convergent nozzle, and the head end area of section of gas hood is more than its tail end section area, the head end of gas hood and
The end section axis of end two is mutually in 90 °.
3. a kind of integrated form with piezo actuator according to claim 1 or 2 intersects the injection mixing of annular groove gaseous fuel
Device, it is characterized in that：Extension is set on valve body, and extension sets air inlet, sets and leads in the valve body below air inlet
Chamber is flowed, air inlet, diversion cavity communicate and form exterior space, and exterior space communicates with inner space, set on valve element and axially enter
Stomata；
Combustion gas vertically flows into diversion cavity through air inlet, and a part of combustion gas is flowed into the center pressure stabilizing cavity of inner space and valve seat,
Remaining combustion gas is flowed into above valve element, and a part of combustion gas stream is through axial air admission hole, full of the air inlet ring cavity on valve element, another part combustion
Gas is flowed into the end pressure stabilizing cavity of valve seat outer end；
When piezo-electric crystal is not powered on, the upper surface of seal band and valve seat on valve element is fitted close, and combustion gas is full of fuel gas injection
The exterior space of the valve inner of valve and inner space；Piezo-electric crystal be powered after, piezo-electric crystal by current excitation so as to extend,
Big piston is promoted to move downward, the hydraulic oil in sleeve is compressed, and in the presence of hydraulic fluid pressure, valve piston is transported upwards
Dynamic, valve rod also moves upwards, and under the fixation of jump ring, band movable valve plug assembly moves upwards, until the hydraulic pressure in sleeve
Oil pressure returns to original state, and valve piston no longer moves, and valve element assembly stops therewith, and combustion gas is by the axial admission hole on valve element
Flow into, by air inlet ring cavity, the space between valve element and valve seat, it is gentle that intake elbow is vertically flowed into after being oriented to by gas outlet
Pipe, enters inlet manifold from the end of tracheae, first kind tracheae annular groove, the second class tracheae annular groove；After piezo-electric crystal power-off, piezoelectricity
Crystal shortens, and in the presence of big piston support spring, big piston returns to initial position, and hydraulic fluid pressure declines in sleeve,
In the presence of back-moving spring, circle ring disk, valve piston move downward, and valve rod, valve element assembly move downward therewith, until in sleeve
Hydraulic fluid pressure returns to original state, and big piston, valve piston return to initial position, and valve element assembly returns to initial position, valve element
Surface is bonded with valve base surface, and fuel gas injection valve is closed, and gas circuit is closed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504572.7A CN107420224B (en) | 2017-06-28 | 2017-06-28 | Integrated cross ring groove gas fuel injection mixing device with piezoelectric actuator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504572.7A CN107420224B (en) | 2017-06-28 | 2017-06-28 | Integrated cross ring groove gas fuel injection mixing device with piezoelectric actuator |
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| CN107420224A true CN107420224A (en) | 2017-12-01 |
| CN107420224B CN107420224B (en) | 2023-05-30 |
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| CN201710504572.7A Active CN107420224B (en) | 2017-06-28 | 2017-06-28 | Integrated cross ring groove gas fuel injection mixing device with piezoelectric actuator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114588566A (en) * | 2022-01-20 | 2022-06-07 | 抚顺华腾防护装备制造有限公司 | Positive pressure oxygen respirator pressure differential regulation and control type automatic oxygen supply device |
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| JP2000204988A (en) * | 1999-01-11 | 2000-07-25 | Isuzu Ceramics Res Inst Co Ltd | Divided gas engine having intake fuel nozzle |
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| SE1250500A1 (en) * | 2012-05-16 | 2013-11-17 | Scania Cv Ab | Valve for a fuel system for an internal combustion engine and a method for controlling a fuel system for an internal combustion engine |
| CN105756824A (en) * | 2016-04-21 | 2016-07-13 | 哈尔滨工程大学 | Combined piezoelectric fuel oil injection and pressurizing electromagnetic fuel gas injection mixed fuel injection device |
| CN207278383U (en) * | 2017-06-28 | 2018-04-27 | 哈尔滨工程大学 | A kind of integrated form with piezo actuator intersects annular groove gaseous fuel jet mixing device |
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2017
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000204988A (en) * | 1999-01-11 | 2000-07-25 | Isuzu Ceramics Res Inst Co Ltd | Divided gas engine having intake fuel nozzle |
| DE102012205564A1 (en) * | 2011-04-05 | 2012-10-11 | Denso Corporation | Fuel injection valve for directly injecting e.g. compressed natural gas into combustion chamber of direct ignition engine, has seal element brought in contact with body-upstream side control structure portion while closing fuel flow chamber |
| SE1250500A1 (en) * | 2012-05-16 | 2013-11-17 | Scania Cv Ab | Valve for a fuel system for an internal combustion engine and a method for controlling a fuel system for an internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114588566A (en) * | 2022-01-20 | 2022-06-07 | 抚顺华腾防护装备制造有限公司 | Positive pressure oxygen respirator pressure differential regulation and control type automatic oxygen supply device |
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| CN107420224B (en) | 2023-05-30 |
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