CN107165745A - Fuel gas injection valve is oriented in a kind of piezoelectric type of through type mixed admission - Google Patents
Fuel gas injection valve is oriented in a kind of piezoelectric type of through type mixed admission Download PDFInfo
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- CN107165745A CN107165745A CN201710504590.5A CN201710504590A CN107165745A CN 107165745 A CN107165745 A CN 107165745A CN 201710504590 A CN201710504590 A CN 201710504590A CN 107165745 A CN107165745 A CN 107165745A
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- valve
- valve element
- piston
- sleeve
- fuel gas
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Classifications
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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
- F02M21/0251—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
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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
Abstract
It is an object of the invention to provide be oriented to fuel gas injection valve in a kind of piezoelectric type of through type mixed admission, it is powered and is extended using piezo-electric crystal, moved via the guide finger of fluid power amplifier displacement enlargement pusher movable valve plug assembly, the overall motion of being lifted off a seat between guide finger and dividing plate under the interior guide effect of mating surface of valve element assembly, realizes the function of gas valve jet；By the way of piezo-electric crystal drives, the response speed of fuel gas injection valve is effectively increased, the lift for realizing fuel gas injection valve is variable；By the axially main direct air inlet of air drain and the mixed admission mode of circumferential tonifying Qi gas inlet hole, big flow is realized, the supply efficiency of engine is effectively improved, while air-flow can be avoided to interfere, the stabilization of gas circuit is realized；By valve element and the multiple tracks zonary structure of valve base chamber, the face sealing of fuel gas injection valve, high reliability are realized.
Description
Technical field
The present invention relates to a kind of fuel gas injection valve, specifically natural gas engine gas injection valve.
Background technology
In recent years, the rapid growth consumed with China's oil, oil heavy dependence import.Combustion of natural gas clean and
In China's rich reserves, the fuel of most possible diesel oil substitute is become.In internal combustion engine industry, energy-saving and emission-reduction are used as internal combustion
Machine development inexorable trend, using natural gas as main fuel internal combustion engine ensure dynamic property on the premise of, can significantly drop
Low emission pollution condition, the study hotspot in industry is already turned into using natural gas in recent years for the internal combustion engine of fuel.It is used as day
The fuel supply system of right gas engine, the performance of fuel gas injection valve directly determines the characteristic of natural gas engine.At present,
In the practical work process of fuel gas injection valve, the flexibility of fuel gas injection valve gas puff Z-pinch, the stability for spraying gaseous-pressure
And the characteristic such as control accuracy can be impacted to engine performance, according to the difference of internal-combustion engine rotational speed, the sound of fuel gas injection valve
Typically at several milliseconds between a few tens of milliseconds between seasonable, i.e., fuel gas injection valve need to possess high response speed and be opened rapidly with meeting it
The requirement of pass, at the same time, fuel gas injection valve also need to possess as far as possible big outlet cross-section area, to ensure that it is sufficient that internal combustion engine is obtained
Gas quantity.Therefore, the high big flow combustion of variable lift, stable gas pressure, control accuracy height, fast response time, reliability is developed
Gas jet valve, is the trend of current natural gas engine gas injection valve development.
The content of the invention
It is an object of the invention to provide lift is variable, fast response time, control accuracy are high, reliability is high, whiff pressure
Fuel gas injection valve is oriented in a kind of piezoelectric type of stable, efficient sealed, big flow through type mixed admission.
The object of the present invention is achieved like this：
Fuel gas injection valve is oriented in a kind of piezoelectric type of through type mixed admission of the present invention, it is characterized in that：Including valve body, valve
Seat, piezo-electric crystal, control valve rod, fluid power amplifier, dividing plate, valve element assembly, valve seat be fixed on below valve body and with valve body it
Between form valve space, the inner upper of valve body, which is fixed with the middle part of fixed block, fixed block, is provided with straight trough, and piezo-electric crystal is arranged on straight trough
In, set in the middle part of valve body and fluid power amplifier is set above dividing plate, dividing plate, dividing plate lower section is set on valve element assembly, dividing plate respectively
Through hole and passage are set, and the fluid power amplifier includes big piston, valve piston, sleeve, and sleeve is arranged on dividing plate, on sleeve
The end at end sets thick outlet, and sleeve upper end tip inside sets thin outlet, and big piston is arranged in thick outlet, and valve piston is set
In thin outlet, big piston support spring is set between the flange and sleeve of big piston, set between the flange and sleeve of valve piston
Put filled with hydraulic oil in the sleeve below valve piston support spring, big piston, valve piston, guide finger passes through the through hole of dividing plate, led
Control valve rod is set to the top of pin, guide finger back-moving spring is set between guide finger and control valve rod, the upper table of valve rod is controlled
Face fits together with piezo-electric crystal, and the lower surface of control valve rod fits together with big piston upper surface, valve piston upper surface
Fit together with guide finger, described valve element assembly includes armature, spring base, bottom plate, valve element, and armature, bottom plate, valve element are certainly
Upper and lower arrangement is linked together by fastening bolt simultaneously, and spring base is located at outside armature and annular is formed between armature
Groove, dividing plate lower surface sets annular groove, and the two ends of armature back-moving spring are arranged in the annular groove of dividing plate and the ring of spring base
In shape groove, guide finger is mutually fixed with armature, is set in guide finger and relief groove is set on pressure compensation opening, bottom plate, and valve element is
Center pressure stabilizing cavity, pressure compensation opening, relief groove, the hollow space of valve element are set on the valve seat below hollow structure, valve element
And center pressure stabilizing cavity communicates and constitutes inner space, seal band and fin, seal band formation ring cavity, valve are set on valve element
Outlet annulus is set on seat, and outlet annulus is located at below ring cavity, gas outlet is set below outlet annulus, valve element upper surface opens up axle
To main air drain, circumferential tonifying Qi hole, and the setting diversion angle of cone at tonifying Qi hole are provided with fin.
The present invention can also include：
1st, the outer end of valve seat sets end pressure stabilizing cavity.
2nd, air inlet, the middle and lower part of fixed block and fluid power amplifier and and valve are formed between the top of fixed block and valve body
Inlet chamber is formed between body, diversion cavity, air inlet, inlet chamber, passage, diversion cavity phase are formed between valve element assembly and valve body
Lead to and constitute exterior space, exterior space is communicated with inner space, axial admission hole is set on valve element；
Combustion gas is vertically flowed into valve body via air inlet, along inlet chamber perpendicular flow, until passage is flowed through, a part
Combustion gas is flowed into valve element assembly inner space and valve seat center pressure stabilizing cavity, and remaining combustion gas continues to flow along diversion cavity, is full of
The end pressure stabilizing cavity and the surrounding space of valve element 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, promotes big piston to move downward, the hydraulic oil in sleeve is compressed, in the presence of hydraulic fluid pressure, valve piston to
Upper motion, guide finger is also moved upwards, and band movable valve plug assembly is moved upwards, and fuel gas injection valve is opened, and gas circuit is opened, Zhi Daotao
Cylinder in hydraulic fluid pressure return to original state, big piston and valve piston are no longer moved, and valve element assembly stops therewith, combustion gas by
Axially the mixed admission mode in main air drain and circumferential tonifying Qi hole is flowed into, and by ring cavity, is finally vertically flowed out by gas outlet；Piezo crystals
After body power-off, piezo-electric crystal shortens, and in the presence of big piston support spring, big piston returns to hydraulic pressure in initial position, sleeve
Oil pressure declines, and in the presence of guide finger back-moving spring, guide finger is moved downward, and valve piston, valve element assembly are downward therewith
Motion, until hydraulic fluid pressure returns to original state in sleeve, big piston, valve piston return to initial position, and valve element assembly is returned
To initial position, spool face is fitted 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 is powered using piezo-electric crystal to be extended, after fluid power amplifier displacement enlargement
Promote the guide finger motion of valve element assembly, the interior guide effect of the overall mating surface between guide finger and dividing plate of valve element assembly
Under lift off a seat motion, realize the function of gas valve jet；The present invention effectively increases combustion by the way of piezo-electric crystal driving
The response speed of gas jet valve, the lift for realizing fuel gas injection valve is variable；The present invention is using straight-through plenum system, it is ensured that enter
Enter the sufficient supply of the combustion gas in valve body；It is engaged, can be effectively suppressed by pressure compensation opening, relief groove and pressure stabilizing cavity
The fluctuation of gaseous-pressure, realizes the steady operation of air-flow, reliably working realizes high response speed inside fuel gas injection valve；Pass through
Axially the mixed admission mode of the main direct air inlet of air drain and circumferential tonifying Qi gas inlet hole, realizes big flow, effectively improves engine
Supply efficiency, while air-flow can be avoided to interfere, realize the stabilization of gas circuit；Pass through valve element and the multiple tracks annulus knot of valve base chamber
Structure, realizes the face sealing of fuel gas injection valve, high reliability.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is valve element composite unit structure schematic diagram of the invention；
Fig. 3 moves towards schematic diagram for the gas circuit of the present invention；
Fig. 4 is valve element three dimensional structure diagram；
Fig. 5 is valve seat construction top view.
Embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail：
It is the entirety that fuel gas injection valve is oriented in a kind of piezoelectric type of through type mixed admission of the invention with reference to Fig. 1-5, Fig. 1
Structural representation, including it is 1 valve body, 2 piezo-electric crystals, 3 fixed blocks, 4 control valve rods, 5 big pistons, 6 big piston support springs, 7 close
It is seal ring, 8 sleeves, 9 guide finger back-moving springs, 10 valve pistons, 11 valve piston support springs, 13 dividing plates, 14 valve element assemblys, 15 close
Sealing rubber ring and 16 valve seats.Fixed block 3 is linked together using screw thread with valve body 1, the center for making its own be fixed on the top of valve body 1
Position, fixed block 3 is provided with the straight trough of certain depth in center, and piezo-electric crystal 2 is arranged therein, and one is provided with above straight trough
The less through hole of diameter, for arranging connecting wires for piezo-electric crystal 2 and the outer control unit of valve body 1, the close cloth in the lower section of piezo-electric crystal 2
Control valve rod 4 is equipped with, the lower surface of control valve rod 4 is in contact with the big upper surface of piston 5, in guide finger back-moving spring 9, big piston
Under the pretightning force effect of support spring 6, the lower surface of piezo-electric crystal 2 is with controlling the upper surface of valve rod 4, controlling the lower surface of valve rod 4 and big
The upper surface of piston 5 is brought into close contact together, and the upper end of sleeve 8 is two outlets, is a thick outlet and a thin outlet respectively, lower end is
The closing chamber of one connection, the lower end of big piston 5 is arranged in the thick outlet of sleeve 8, and big piston support spring 6 is located at big piston 5
Between flange and sleeve 8, it is ensured that big piston 5 integrally will not enter in sleeve 8, and the liquid with certain pressure is filled with sleeve 8
Valve piston 10 is disposed with above force feed 12, the thin outlet of sleeve 8, the lower end of valve piston 10 is arranged therein, in the flange of valve piston 10
Valve piston support spring 11 is disposed between sleeve 8, to ensure that valve piston 10 integrally will not enter in sleeve 8, big piston 5,
Sealing ring 7 is disposed between the side surface of valve piston 10 and the inwall of sleeve 8, to prevent the leakage of hydraulic oil 12 in sleeve 8, big piston
5th, the fluid power that valve piston 10, big piston support spring 6, valve piston support spring 11 have together constituted with piezo-electric crystal with sleeve 8 is put
Big device, fluid power amplifier as an integral arrangement below the top of the median septum 13 of valve body 1, control valve rod 4 center from
Top to bottm has been sequentially arranged valve element assembly 14, valve seat 16, under the pretightning force effect of valve piston support spring 11, valve piston 10
Upper surface and the upper end of valve element assembly 14 are brought into close contact, be bolted to connection between valve seat 16 and valve body 1 together with, two
Mating surface between person realizes sealing by O-ring seal 15.
As shown in Fig. 2 a kind of piezoelectric type of through type mixed admission in be oriented to fuel gas injection valve valve element assembly 14 by
Guide finger 18, armature 19, spring base 20, bottom plate 21, valve element 22, armature back-moving spring 26, pad 27 and fastening bolt 29 are constituted,
To ensure that guide finger 18 is smoothly moved, multiple valve pistons 10 are arranged symmetrically in the lower section of guide finger 18, and number is even number,
In the presence of valve piston support spring 11, the upper surface of valve piston 10 is closely pasted with the lower surface of guide finger 18 in valve element assembly 14
Close, the center of guide finger 18 is provided with pressure compensation opening 25, in the through hole for being arranged in the center of dividing plate 13, and the lower end of guide finger 18 passes through screw thread
Connection be fixed together with armature 19, armature 19 is linked together by fastening bolt 29 with bottom plate 21, valve element 22, armature 19 and
One layer of pad 27 is disposed between bottom plate 21, the top of bottom plate 21 is provided with four relief grooves 28 so that in valve element assembly 14
Portion space is connected with exterior space, and inside and outside airline pressure is more easy to reach balance, it is to avoid it is improved its sound by extra axial force
Speed is answered, spring base 20 is arranged on the top of bottom plate 21, its internal side surface is in contact with the side surface of armature 19, and armature is multiple
The two ends of position spring 26 are located at dividing plate 13 respectively and in the annular groove of spring base 20, the valve element 22 of the lower section of bottom plate 21 is by valve element master
Body, fin 23 and seal band 24 are constituted, and the integral arrangement of valve element assembly 14 is below control valve rod 4.
As shown in figure 3, first, combustion gas is vertically flowed into valve body 1 via air inlet 31, along the perpendicular flow of inlet chamber 32,
Until the passage 33 at the two ends of 1 upper spacer of valve body 13 is flowed through, due to the presence of the relief groove 28 on bottom plate 21, valve element combination
The inner space of body 14 is connected with space in valve body 1, and a part of combustion gas can be flowed into the inner space of valve element assembly 14, be full of immediately
The pressure stabilizing cavity 36 of the inner space of valve element assembly 14 and the center of valve seat 16, due to the upper pressure balance hole 25 of guide finger 18
In the presence of combustion gas can flow into the superjacent air space of valve element assembly 14, equally be full of the superjacent air space of valve element assembly 14, and inside and outside gas circuit reaches
Balance, it is ensured that no pressure is poor inside and outside valve element assembly 14, it is to avoid it is by extra axial force；Remaining combustion gas is along diversion cavity 34
Flow into full of the pressure stabilizing cavity 36 inside valve body 1, being filled with the periphery of valve seat 16 and the surrounding space of valve element 22.Piezo-electric crystal 2
When being not powered on, the surface of valve element 22 is fitted with the surface of valve seat 16, and the ring cavity 37 between valve element 22 and valve seat 16 is not connected；Piezo-electric crystal
After 2 are powered, piezo-electric crystal 2 extends, the motion, the lower surface of valve element 22 upwards of band movable valve plug assembly 14 after amplifying through fluid power amplifier
Depart from the upper surface of valve seat 16, now, gas circuit is opened, combustion gas is rapidly by the mixed admission in axially main air drain 39 and circumferential tonifying Qi hole 35
Mode is flowed into, by multiple tracks ring cavity 37 between valve element 22 and valve seat 16, is finally vertically flowed out by gas outlet 38, valve element 22 lift with
Take a seat and control break-make between ring cavity 37.
In the fuel gas injection valve course of work, when piezo-electric crystal 2 is not powered on, in guide finger back-moving spring 9, armature back-moving spring
Under 26 pretightning force effect, valve element assembly 14 remains motionless in initial position, close on the valve element 22 in valve element assembly 14
The upper outlet annulus 17 of seal ring band 24 and valve seat 16 is fitted close, and the ring cavity 37 between valve element 22 and valve seat 16 is not connected, combustion gas
Whole space inside valve body 1 full of fuel gas injection valve.Piezo-electric crystal 2 be powered after, piezo-electric crystal 2 by current excitation so as to
Elongation so that control valve rod 4 is moved downward, and big piston 5 is moved downward therewith, the pressure rise of hydraulic oil 12 in sleeve 8, in liquid
Press oil in the presence of 12 pressure, valve piston 10 is moved upwards, guide finger 18 is put down by after the upward active force of four valve pistons 10
Quietly motion upwards, guide finger 18 is as a part for valve element assembly 14, and valve element assembly 14 is overall to move upwards therewith, directly
Original state is returned to the pressure of hydraulic oil 12 in sleeve 8, big piston 5, the stop motion of valve piston 10, valve element assembly 14 is therewith
Stop motion, valve element assembly 14 maintains a period of time in the position, during this, and combustion gas is rapidly by axially main air drain 39 and week
Flowed into the mixed admission mode in tonifying Qi hole 35, by the multiple tracks ring cavity 37 between valve element 22 and valve seat 16, finally via gas outlet
Vertically flowed out after 38 guiding, the multiple tracks annulus between valve element 22 and valve seat 16, face sealing, voltage stabilizing balance, and wider annulus face
Product can reduce impact, improve and be provided with pressure stabilizing cavity 36 at reliability, the center of valve seat 16 and periphery so that the combustion gas of surrounding exists
Ventilated in flow process uniform, air pressure balance；After combustion gas ejection is a certain amount of, piezo-electric crystal 2 starts power-off, and piezo-electric crystal 2 shortens,
In the presence of big piston support spring 6, big piston 5 starts the pressure of hydraulic oil 12 in upward motion, sleeve 8 and declined, and is being oriented to
Sell in the presence of back-moving spring 9, guide finger 18 starts to move downward, valve piston 10, valve element assembly 14 are overall one in the same direction therewith
Lower motion, until the pressure of hydraulic oil 12 returns to original state in sleeve 8, big piston 5, valve piston 10 return to initial position, now
Valve element assembly 14 is also corresponding to return to initial position, and the lower surface of valve element 22 is fitted with the upper surface of valve seat 16, comes back to initial
Position, fuel gas injection valve is closed, and gas circuit is closed.
From the above-mentioned course of work, fuel gas injection valve is oriented in a kind of piezoelectric type of through type mixed admission of the invention,
In the course of the work, it is powered and is extended using piezo-electric crystal 2, via fluid power amplifier displacement enlargement pusher movable valve plug assembly 14
Guide finger 18 is moved, and valve element assembly 14 is overall to leave valve between guide finger 18 and dividing plate 13 under the interior guide effect of mating surface
Seat 16 is moved, and realizes the function of gas valve jet；The present invention effectively increases gas injection by the way of the driving of piezo-electric crystal 2
The response speed of valve is penetrated, the lift for realizing fuel gas injection valve is variable；The present invention is using straight-through plenum system, it is ensured that enter
The sufficient supply of combustion gas in valve body；Ensure the perpendicularity of valve element 22 by interior guide frame；By being opened at the center of guide finger 18
Pressure compensation opening 25 is simultaneously provided with a number of relief groove 28 on bottom plate 21, makes gas circuit pressure inside and outside at valve element assembly 14
Power is more easy to reach balance, it is to avoid valve element assembly 14 is improved its response speed, reduction control difficulty by axial force；In valve element
The structure in multiple circumferential tonifying Qi holes 35 is opened on 22 fin 23, the lower surface of valve element 22 and the upper surface of valve seat 16 are provided with multiple tracks ring cavity
37, increase valid circulation area, reduce the mass of valve element 22, improve reliability；Set certain at the circumferential tonifying Qi hole 35 of valve element 22
The diversion angle of cone 30 of angle, reduces flow losses, increases discharge coefficient；The present invention is using the axially direct air inlet of main air drain 39 and week
To the mixed admission mode of the air inlet of tonifying Qi hole 35, increase charge flow rate coefficient, realize big flow, be effectively improved fuel gas injection
The supply efficiency of valve, while air-flow can be avoided to interfere, realizes balancing, stably for gas circuit；Using many between valve element 22 and valve seat 16
Road seal band 24 and the structure of outlet annulus 17, realize the face sealing of fuel gas injection valve, voltage stabilizing balance, and wider annulus face
Product can reduce impact, improve reliability；Pressure stabilizing cavity 36 is respectively provided with the center of valve seat 16 and periphery, can effectively suppress gas injection
The fluctuation of gaseous-pressure inside valve is penetrated, the steady operation of air-flow is realized, reliably working realizes high response speed.
Technical scheme：Fuel gas injection valve is oriented in a kind of piezoelectric type of through type mixed admission, it mainly by
Valve body, piezo-electric crystal, fixed block, control valve rod, big piston, big piston support spring, sealing ring, sleeve, guide finger reset bullet
Spring, valve piston, valve piston support spring, dividing plate, valve element assembly, O-ring seal and valve seat composition.Fixed block is connected using screw thread
Connect and linked together with valve body, its own is fixed on the center above valve body, fixed block is provided with necessarily in center
The straight trough of depth, piezo-electric crystal is arranged therein, and the less through hole of a diameter is provided with above straight trough, for arranging piezo-electric crystal
With connecting wires for valve body outer control unit, close arrangement has control valve rod below piezo-electric crystal, control the lower surface of valve rod with it is big
Piston upper surface is in contact, under the pretightning force effect of guide finger back-moving spring, big piston support spring, piezo-electric crystal lower surface
Together with being brought into close contact with big piston upper surface with control valve rod upper surface, control valve rod lower surface, sleeve upper end is scene 2
Mouthful, it is a thick outlet and a thin outlet respectively, lower end is the closing chamber of a connection, and the lower end of big piston is arranged in slightly going out for sleeve
Intraoral, big piston support spring is located between big plunger flange and sleeve, it is ensured that big piston integrally will not enter in sleeve, sleeve
Inside it is filled with above the hydraulic oil with certain pressure, the thin outlet of sleeve and is disposed with valve piston, valve piston lower end is arranged in it
In, valve piston support spring is disposed between valve piston flange and sleeve, to ensure that valve piston integrally will not enter in sleeve,
Sealing ring is disposed between piston, valve piston side surface and sleeve lining greatly, it is big living to prevent the leakage of hydraulic oil in sleeve
Plug, valve piston, big piston support spring, valve piston support spring and sleeve have together constituted with the fluid power amplifier of piezo-electric crystal,
Fluid power amplifier as an integral arrangement in the top of valve body median septum, below control valve rod center from top to bottom successively
Valve element assembly, valve seat are disposed with, under the pretightning force effect of valve piston support spring, valve piston upper surface and valve element assembly
Upper end be brought into close contact, be bolted to connection between valve seat and valve body together with, mating surface therebetween passes through sealing
Cushion rubber realizes sealing；Foregoing valve element assembly is by guide finger, armature, armature back-moving spring, spring base, pad, bottom plate, tight
Fixing bolt and valve element composition, to ensure that guide finger is smoothly moved, multiple valve pistons are arranged symmetrically in below guide finger, and number is
Even number, in the presence of valve piston support spring, valve piston upper surface and guide finger lower surface in valve element assembly are tight
Closely connected to close, guide pin centre is provided with pressure compensation opening, in the through hole for being arranged in dividing plate center, and guide finger lower end is connected through a screw thread
It is fixed together with armature, armature is linked together by fastening bolt with bottom plate, valve element, and one is disposed between armature and bottom plate
Four relief grooves are provided with above layer pad, bottom plate, spring base is arranged on the top of bottom plate, its internal side surface and armature
Side surface be in contact, the two ends of armature back-moving spring are located in the annular groove of dividing plate and spring base respectively, the valve below bottom plate
Core is made up of valve element main body, fin, seal band, and valve element assembly integral arrangement is below control valve rod, in the fin of valve element
On open circumferential tonifying Qi hole and at tonifying Qi hole set diversion angle of cone, between valve element and valve seat use seal band and outlet annulus,
Face is sealed, voltage stabilizing balance, and with wider annulus area, pressure stabilizing cavity, valve are provided with valve seat center and periphery
The pressure stabilizing cavity of seat center is connected with the combustion gas space inside valve element assembly, and pressure stabilizing cavity and valve body at valve seat periphery
Interior diversion cavity is connected.When piezo-electric crystal is not powered on, valve element lower surface fits with valve seat upper surface, valve element and valve base chamber
Ring cavity is not connected；After piezo-electric crystal is powered, piezo-electric crystal elongation, band movable valve plug assembly is transported upwards after amplifying through fluid power amplifier
Dynamic, valve element lower surface departs from valve seat upper surface, and now valve element is connected with the ring cavity of valve base chamber, the control of lifting and take a seat of valve element
The break-make between ring cavity.
Claims (3)
1. fuel gas injection valve is oriented in a kind of piezoelectric type of through type mixed admission, it is characterized in that：Including valve body, valve seat, piezoelectricity
Crystal, control valve rod, fluid power amplifier, dividing plate, valve element assembly, valve seat are fixed on below valve body and valve are formed between valve body
Space, the inner upper of valve body, which is fixed with the middle part of fixed block, fixed block, is provided with straight trough, and piezo-electric crystal is arranged in straight trough, valve body
Middle part sets to set to set below fluid power amplifier, dividing plate above dividing plate, dividing plate sets through hole respectively on valve element assembly, dividing plate
And passage, the fluid power amplifier includes big piston, valve piston, sleeve, and sleeve is arranged on dividing plate, the end of sleeve upper end
Thick outlet is set, and sleeve upper end tip inside sets thin outlet, and big piston is arranged in thick outlet, and valve piston is arranged on thin outlet
In, big piston support spring is set between the flange and sleeve of big piston, valve piston is set between the flange and sleeve of valve piston
Filled with hydraulic oil in sleeve below support spring, big piston, valve piston, guide finger pass through dividing plate through hole, guide finger it is upper
Side sets control valve rod, and guide finger back-moving spring is set between guide finger and control valve rod, controls upper surface and the piezoelectricity of valve rod
Crystal fits together, and the lower surface of control valve rod fits together with big piston upper surface, valve piston upper surface and guide finger
Fit together, described valve element assembly includes armature, spring base, bottom plate, valve element, armature, bottom plate, valve element cloth from top to bottom
Put while being linked together by fastening bolt, spring base is located at outside armature and formed between armature under annular groove, dividing plate
Surface sets annular groove, and the two ends of armature back-moving spring are arranged in the annular groove of the annular groove of dividing plate and spring base, led
Mutually fixed with armature to pin, set in guide finger and relief groove is set on pressure compensation opening, bottom plate, valve element is hollow structure,
Center pressure stabilizing cavity is set on the valve seat below valve element, and pressure compensation opening, relief groove, the hollow space of valve element and center are steady
Pressure chamber communicates and constitutes inner space, sets and is set out on seal band and fin, seal band formation ring cavity, valve seat on valve element
Compression ring band, outlet annulus is located at below ring cavity, and gas outlet is set below outlet annulus, and valve element upper surface opens up axially main air drain,
Circumferential tonifying Qi hole, and the setting diversion angle of cone at tonifying Qi hole are provided with fin.
2. fuel gas injection valve is oriented in a kind of piezoelectric type of through type mixed admission according to claim 1, it is characterized in that：
The outer end of valve seat sets end pressure stabilizing cavity.
3. fuel gas injection valve, its feature are oriented in a kind of piezoelectric type of through type mixed admission according to claim 1 or 2
It is：Form air inlet between the top of fixed block and valve body, the middle and lower part of fixed block and fluid power amplifier and between valve body
Inlet chamber is formed, diversion cavity is formed between valve element assembly and valve body, air inlet, inlet chamber, passage, diversion cavity are communicated and structure
Into exterior space, exterior space is communicated with inner space, and axial admission hole is set on valve element；
Combustion gas is vertically flowed into valve body via air inlet, along inlet chamber perpendicular flow, until flowing through passage, a part of combustion gas
Valve element assembly inner space and valve seat center pressure stabilizing cavity are flowed into, remaining combustion gas continues to flow along diversion cavity, full of valve seat
The end pressure stabilizing cavity and the surrounding space of valve element of 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；After piezo-electric crystal is powered, piezo-electric crystal by current excitation so as to extending,
Big piston is promoted to move downward, the hydraulic oil in sleeve is compressed, in the presence of hydraulic fluid pressure, and valve piston is transported upwards
Dynamic, guide finger is also moved upwards, and band movable valve plug assembly is moved upwards, and fuel gas injection valve is opened, and gas circuit is opened, until in sleeve
Hydraulic fluid pressure return to original state, big piston and valve piston are no longer moved, and valve element assembly stops therewith, and combustion gas is by axial direction
The mixed admission mode in main air drain and circumferential tonifying Qi hole is flowed into, and by ring cavity, is finally vertically flowed out by gas outlet；Piezo-electric crystal breaks
After electricity, piezo-electric crystal shortens, and in the presence of big piston support spring, big piston returns to hydraulic oil pressure in initial position, sleeve
Power declines, and in the presence of guide finger back-moving spring, guide finger is moved downward, and valve piston, valve element assembly are moved downward therewith,
Until hydraulic fluid pressure returns to original state in sleeve, big piston, valve piston return to initial position, and valve element assembly is returned to initially
Position, spool face is fitted 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 |
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| CN201710504590.5A CN107165745B (en) | 2017-06-28 | 2017-06-28 | Piezoelectric internal guide gas injection valve for straight-through mixed air intake |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710504590.5A CN107165745B (en) | 2017-06-28 | 2017-06-28 | Piezoelectric internal guide gas injection valve for straight-through mixed air intake |
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| CN107165745B CN107165745B (en) | 2023-05-30 |
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Citations (6)
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|---|---|---|---|---|
| JP2009281193A (en) * | 2008-05-20 | 2009-12-03 | Toyota Motor Corp | Fuel injection valve for cylinder injection |
| CA2780864A1 (en) * | 2012-06-21 | 2012-09-03 | Westport Power Inc. | Fuel injection valve and method of actuating |
| 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 |
| CN205206998U (en) * | 2015-11-27 | 2016-05-04 | 哈尔滨工程大学 | Electromagnetic control of leakage formula fuel gas jetting device is not had in pressure boost |
| CN206816397U (en) * | 2017-06-28 | 2017-12-29 | 哈尔滨工程大学 | Fuel gas injection valve is oriented in a kind of piezoelectric type of through type mixed admission |
-
2017
- 2017-06-28 CN CN201710504590.5A patent/CN107165745B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009281193A (en) * | 2008-05-20 | 2009-12-03 | Toyota Motor Corp | Fuel injection valve for cylinder injection |
| 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 |
| CA2780864A1 (en) * | 2012-06-21 | 2012-09-03 | Westport Power Inc. | Fuel injection valve and method of actuating |
| CN205206998U (en) * | 2015-11-27 | 2016-05-04 | 哈尔滨工程大学 | Electromagnetic control of leakage formula fuel gas jetting device is not had in pressure boost |
| CN206816397U (en) * | 2017-06-28 | 2017-12-29 | 哈尔滨工程大学 | Fuel gas injection valve is oriented in a kind of piezoelectric type of through type mixed admission |
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| CN107165745B (en) | 2023-05-30 |
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