CN206816405U - A kind of combined electromagnetic piezoelectricity fuel gas injection valve - Google Patents

Abstract

The purpose of this utility model is to provide a kind of this combined electromagnetic piezoelectricity fuel gas injection valve, the valve element assembly of electromagnetic drive and the valve element assembly of Piezoelectric Driving share a valve body and valve seat, using electromagnetism, two kinds of different modes of Piezoelectric Driving, the separately motion of valve element assembly corresponding to control, the switching of fuel gas injection when single spool or double spool lift can quickly be realized, control accuracy of the fuel gas injection valve to fuel injection amount is ensure that using the characteristic of piezo-electric crystal, the electromagnetic drive cooperation same-action of Piezoelectric Driving one ensure that the requirement of the big emitted dose of the combustion gas of fuel gas injection valve, to the different demands of fuel gas injection amount when meeting internal combustion engine different capacity；Using the valve seat construction with pressure stabilizing cavity, it can effectively inhibit the fluctuation of gaseous-pressure inside fuel gas injection valve, ensure that the stability of fuel gas injection valve whiff pressure.

Description

A kind of combined electromagnetic piezoelectricity fuel gas injection valve

Technical field

The utility model relates to a kind of fuel gas injection valve, the combustion specifically on gas machine and bi-fuel internal combustion engine Gas jet valve.

Background technology

With the development of society, as the natural gas, because of one of new clean energy resource its own rich reserves, cheap, combustion The advantages that burning cleaning, turns into the energy most with prospects, receives people's extensive concern.In internal combustion engine industry, by natural gas Little by little it is being actually applied as internal combustion engine main fuel Deng clean energy resource, main fuel is used as using gaseous fuels such as natural gases Internal combustion engine already becomes the study hotspot in industry.Fuel gas injection valve is as the important enforcement division in internal combustion engine supply system Part, the good and bad of its performance influence significantly on internal combustion engine working characteristics.At present, it is single in the internal combustion engine full working scope course of work Cylinder power bracket is wide, and the control accuracy sprayed suitable for the fuel gas injection valve of big flow for small-flow gas is not high, is unsatisfactory for Internal combustion engine, to the control accuracy requirement of fuel gas injection, internal combustion is unsatisfactory for suitable for the fuel gas injection valve of low discharge in sub-load Requirement of the machine under high-power operating mode to the injection of combustion gas big flow, internal combustion engine is matched only with single fuel gas injection valve, can not Meet power demand of the internal combustion engine under different operating modes.According to the difference of internal-combustion engine rotational speed, the response time one of fuel gas injection valve As at several milliseconds between a few tens of milliseconds, i.e. what fuel gas injection valve need to possess the characteristics of quick response to meet that it switchs rapidly will Ask, stability, the size of outlet cross-section area of fuel gas injection pressure can be to internal combustion engine works when fuel gas injection valve works in addition Impacted as characteristic.

The content of the invention

The purpose of this utility model is to provide that the power bracket of matching internal combustion engine full working scope, flow be variable, fuel gas injection A kind of combined electromagnetic piezoelectricity fuel gas injection valve of pressure stability.

What the purpose of this utility model was realized in：

A kind of combined electromagnetic piezoelectricity fuel gas injection valve of the utility model, it is characterized in that：Including valve body, valve seat, dividing plate, electricity Magnet valve part, piezoelectric, valve seat are fixed on below valve body, and dividing plate is set in the middle part of valve body, and first through hole and the are set on dividing plate Two through holes；

The electromagnetism valve portion includes electromagnet, the first valve element assembly, and electromagnet is located in the valve body above dividing plate simultaneously Fixed with valve body upper end, wound around coil in electromagnet, the first valve element assembly is located in the valve body below dividing plate, the first valve element group Zoarium includes the first armature, the first spring base, the first bottom plate, the first valve element, the first guide finger, the first armature, the first bottom plate, the One valve element arranges while linked together by fastening bolt from top to bottom, and the first spring base is located at outside the first armature and with the Annular groove is formed between one armature, annular groove is set inside electromagnet, the both ends of electromagnet master reset spring are arranged in electricity In the annular groove of the annular groove of magnet and the first spring base, the first guide finger is installed at the first armature center, the first guide finger is worn The first through hole for crossing dividing plate is stretched in electromagnet, and the auxiliary back-moving spring of electromagnet, the auxiliary back-moving spring of electromagnet are set in electromagnet Both ends contact electromagnet and the first guide finger respectively, first pressure balance pipe is set in the first guide finger, set on the first bottom plate Put first pressure compensating groove, the first valve element is hollow structure, and the first center pressure stabilizing cavity is set on the valve seat below the first valve element, One pressure compensation opening, first pressure compensating groove, the hollow space of the first valve element and the first center pressure stabilizing cavity communicate, the first valve element The first seal band of upper setting, the first seal band form the first ring cavity, and the first valve element upper surface opens up the first main air drain in axial direction, Circumferential tonifying Qi hole is provided with first fin, and the first diversion angle of cone is set at the first tonifying Qi hole；

The piezoelectric includes fixed block, piezo-electric crystal, control valve rod, fluid power amplifier, the second valve element assembly, Gu Determine the inner upper end that block is fixed on valve body, straight trough is provided with the middle part of fixed block, piezo-electric crystal is arranged in straight trough, and fluid power amplifier is set Put in the top of dividing plate, the second valve element assembly is arranged on the lower section of dividing plate, and fluid power amplifier includes big piston, valve piston, set Cylinder, sleeve are arranged on dividing plate, and the end set of sleeve upper end slightly exports, and sleeve upper end tip inside sets thin outlet, big living Plug is arranged in thick outlet, and valve piston is arranged in thin outlet, and big piston support bullet is set between the flange and sleeve of big piston Spring, valve piston support spring is set, filled with hydraulic pressure in the sleeve below big piston, valve piston between the flange and sleeve of valve piston Oil, the second guide finger pass through the second through hole of dividing plate, and the top of the second guide finger sets control valve rod, the second guide finger and control Guide finger back-moving spring is set between valve rod, and the upper surface and piezo-electric crystal for controlling valve rod fit together, controlled under valve rod Surface fits together with big piston upper surface, and valve piston upper surface fits together with the second guide finger, the combination of the second valve element Body includes the second armature, second spring seat, the second bottom plate, the second valve element, the second armature, the second bottom plate, the second valve element from upper and Lower arrangement is linked together by fastening bolt simultaneously, and second spring seat is located at outside the second armature and the shape between the second armature Circularize groove, dividing plate lower surface sets annular groove, the both ends of the second armature back-moving spring be arranged in dividing plate annular groove and In the annular groove of spring base, the second guide finger is mutually fixed with the second armature, and second pressure balance pipe is set in the second guide finger, the Second pressure compensating groove is set on two bottom plates, and the second valve element be hollow structure, on the valve seat below the second valve element in setting second Heart pressure stabilizing cavity, second pressure balance pipe, second pressure compensating groove, the hollow space of the second valve element and the second center pressure stabilizing cavity phase It is logical, the second seal band and the second fin are set on the second valve element, and the second seal band forms the second ring cavity, the second valve element upper table Face opens up the second main air drain in axial direction, is provided with the second circumferential tonifying Qi hole on the second fin, and set second to lead at the second tonifying Qi hole Flow cone angle；

Outlet annulus is set on valve seat, and outlet annulus is located at below the first ring cavity and the second ring cavity, is set below outlet annulus Put gas outlet.

The utility model can also include：

1st, the outer end of valve seat sets end pressure stabilizing cavity.

The 2nd, bypass air inlet is set on the valve body below dividing plate, the body portion connected with bypass air inlet is diversion cavity, Combustion gas is entered by bypass air inlet, flows into valve inner along diversion cavity, a portion passes through first pressure compensating groove, second Relief groove flows into the inner space of the first valve element assembly and the second valve element assembly, full of the first pressure stabilizing cavity, second steady Press chamber, end pressure stabilizing cavity, and flow to the superjacent air space of the first valve element assembly and the second valve element assembly, another part combustion gas by First axially axially main air drain and the first tonifying Qi hole, the mixed admission mode in the second tonifying Qi hole flow into for main air drain, second, full of the The end pressure stabilizing cavity of one ring cavity, the second ring cavity and valve seat；

When electromagnetism valve portion works independently, when coil is not powered on, in electromagnet master reset spring and the auxiliary reset of electromagnet Under the pretightning force effect of spring, the upper surface of seal band and valve seat on the first valve element is fitted close, and combustion gas is full of in valve body Portion；After coil electricity, the first armature is acted on by upward electromagnetic force, and the first valve element assembly is overcoming electromagnet master reset bullet Being moved upwards after the pretightning force of the auxiliary back-moving spring of spring, electromagnet, the first valve element is separated with valve base surface, and fuel gas injection valve is opened, Gas circuit is opened, combustion gas by first axially the mixed admission mode in main air drain and the first circumferential tonifying Qi hole flow into, by the first ring cavity, Finally vertically flowed out by gas outlet；After coil blackout, in the pretightning force of electromagnet master reset spring and the auxiliary back-moving spring of electromagnet Under effect, the first armature moves downward, and the first valve element assembly integrally moves downward, until the first spool face and valve base surface Fitting, initial position is come back to, fuel gas injection valve is closed, and gas circuit is closed；

When piezoelectric works independently, when piezo-electric crystal is not powered on, the second seal band and valve seat on the second valve element Upper surface is fitted close, and combustion gas is full of inside gas valve body；After piezo-electric crystal is powered, piezo-electric crystal is by current excitation so as to stretching It is long, promote big piston to move downward, the hydraulic oil in sleeve is compressed, and in the presence of hydraulic fluid pressure, valve piston is upward Motion, the second guide finger are also moved upwards, and band the second movable valve plug assembly moves upwards, and fuel gas injection valve is opened, and gas circuit is opened, Until the hydraulic fluid pressure in sleeve returns to original state, big piston and valve piston no longer move, and the second valve element assembly is therewith Stop, combustion gas by second axially the mixed admission mode in main air drain and the second circumferential tonifying Qi hole flow into, by the second ring cavity, finally Vertically flowed out by gas outlet；After piezo-electric crystal power-off, piezo-electric crystal shortens, in the presence of big piston support spring, big piston Initial position is returned to, hydraulic fluid pressure declines in sleeve, and in the presence of guide finger back-moving spring, the second guide finger is transported downwards Dynamic, valve piston, the second valve element assembly move downward therewith, until hydraulic fluid pressure returns to original state in sleeve, big piston, Valve piston returns to initial position, and the second valve element assembly returns to initial position, and the second spool face is bonded with valve base surface, combustion gas Injection valve is closed, and gas circuit is closed；

It is identical when its respective action is with each working independently when electromagnetism valve portion and piezoelectric work together.

Advantage of the present utility model is：The valve element assembly of the utility model electromagnetic drive and the valve element group of Piezoelectric Driving Zoarium shares a valve body and valve seat, using electromagnetism, two kinds of different modes of Piezoelectric Driving, separately valve corresponding to control The motion of core assembly, the switching of fuel gas injection when single spool or double spool lift can be quickly realized, utilizes piezo-electric crystal Characteristic ensure that control accuracy of the fuel gas injection valve to fuel injection amount, and electromagnetic drive coordinates the same-action of Piezoelectric Driving one ensure that The requirement of the big emitted dose of combustion gas of fuel gas injection valve, to the different demands of fuel gas injection amount when meeting internal combustion engine different capacity； The utility model uses the valve seat construction with pressure stabilizing cavity, and it can effectively inhibit the ripple of gaseous-pressure inside fuel gas injection valve It is dynamic, it ensure that the stability of fuel gas injection valve whiff pressure.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model；

Fig. 2 a are magnetic valve partial side elevation view, and Fig. 2 b are piezoelectric side view；

Fig. 3 is the schematic enlarged-scale view of the first valve element assembly；

Fig. 4 is the schematic enlarged-scale view of the second valve element assembly；

Fig. 5 a are that electromagnetism valve portion gas circuit moves towards side view, and Fig. 5 b are that piezoelectric gas circuit moves towards side view, and Fig. 5 c are valve Internal portion entirety gas circuit moves towards figure；

Fig. 6 is the three-dimensional structure enlarged drawing of valve element；

Fig. 7 is the three-dimensional structure enlarged drawing of valve seat.

Embodiment

Illustrate below in conjunction with the accompanying drawings and the utility model is described in more detail：

With reference to Fig. 1-7, Fig. 1 is that a kind of overall structure of combined electromagnetic piezoelectricity fuel gas injection valve of the utility model is illustrated Figure, Fig. 2 are a kind of side view of combined electromagnetic piezoelectricity fuel gas injection valve, including 1 valve body, 2 electromagnet, 3 coils, 4 electromagnet Auxiliary back-moving spring, 5 electromagnet master reset springs, 7 first valve element assemblys, 8 O-ring seals, 10 fixed blocks, 11 piezo-electric crystals, 12 Control valve rod, 13 guide finger back-moving springs, 14 big pistons, 15 big piston support springs, 16 valve piston support springs, 17 small work Plug, 18 sealing rings, 19 sleeves, 21 second valve element assemblys and 23 valve seats.Electromagnet 2, fixed block 10 pass through screw thread and valve body 1 Link together so that electromagnet 2 is fixed on the left-half center of valve body 1, fixed block 10 is fixed on the right half part of valve body 1 Center, in the left-half of valve body 1, coil 3 is wrapped in the annular groove inside electromagnet 2, and the arranged beneath of electromagnet 2 has First valve element assembly 7, electromagnet master reset spring 5 and electromagnet are disposed between the valve element assembly 7 of electromagnet 2 and first Auxiliary back-moving spring 4, the lower surface of first valve element assembly 7 and the upper surface of the left-half of valve seat 23 are brought into close contact when initial, lower section Valve seat 23 be provided with bolt hole 58, be fixed together using bolt and the valve body 1 above it, the upper surface of valve seat 23 and valve Mating surface between the lower surface of body 1, i.e. valve seat 23 and valve body 1 is disposed with O-ring seal 8 to ensure sealing therebetween, The both ends at the first seal band 30 of the center lower end of the first valve element assembly 7 and close first valve element 28 of valve seat 23 It is provided with pressure stabilizing cavity 9, the combustion inside the valve element assembly 7 of pressure stabilizing cavity 9 and first of the center lower end of the first valve element assembly 7 Headroom is connected, and close to the first valve element 28 the first seal band 30 at both ends pressure stabilizing cavity 9 and the inner space phase of valve body 1 Connection；In the right half part of valve body 1, fixed block 10 is provided with the straight trough of certain depth in center, and piezo-electric crystal 11 is arranged Wherein, the less through hole of a diameter is provided with above straight trough, for arranging connecing for piezo-electric crystal 11 and the outer control unit of valve body 1 Electric wire, the lower section close arrangement of piezo-electric crystal 11 have control valve rod 12, control the lower surface of valve rod 12 and the big upper surface phase of piston 14 Contact, under the pretightning force effect of guide finger back-moving spring 13, big piston support spring 15, the lower surface of piezo-electric crystal 11 and control Together with the upper surface of valve rod 12, the control lower surface of valve rod 12 are brought into close contact with the big upper surface of piston 14, the upper end of sleeve 19 is two Outlet, 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 14 is arranged in sleeve 19 Thick outlet in, big piston support spring 15 ensures that big piston 14 will not be overall between the big flange of piston 14 and sleeve 19 Into in sleeve 19, the hydraulic oil 20 with certain pressure is filled with sleeve 19, is disposed with above the thin outlet of sleeve 19 small Piston 17, the lower end of valve piston 17 are arranged therein, and valve piston support spring is disposed between the flange of valve piston 17 and sleeve 19 16, to ensure that valve piston 17 integrally will not enter in sleeve 19, between big piston 14, the side surface of valve piston 17 and the inwall of sleeve 19 Sealing ring 18 is disposed with, to prevent the leakage of hydraulic oil 20 in sleeve 19, big piston 14, valve piston 17, big piston support spring 15th, valve piston support spring 16 has together constituted with the fluid power amplifier of piezo-electric crystal 11 with sleeve 19, and fluid power amplifier is as one Individual integral arrangement has been sequentially arranged the second valve from top to bottom in the top of the median septum 6 of valve body 1, control valve rod 12 below center Core assembly 21, valve seat 23, under the pretightning force effect of valve piston support spring 16, the upper surface of valve piston 17 and the second valve element group The upper end of zoarium 21 is brought into close contact, and the lower surface of second valve element assembly 21 is closely pasted with the right half part upper surface of valve seat 23 when initial Close, second seal band 43 liang of the valve seat 23 below the center of the second valve element assembly 21 and close to the second valve element 41 Pressure stabilizing cavity 9 is provided with end, in the valve element assembly 21 of pressure stabilizing cavity 9 and second below the center of the second valve element assembly 21 The combustion gas space in portion is connected, and the pressure stabilizing cavity 9 at the both ends of the second seal band 43 is connected with the inner space of valve body 1.

As shown in figure 3, the first foregoing valve element assembly 7 is by the first guide finger 24, the first armature 25, the first spring base 26th, the first bottom plate 27, the first valve element 28, jump ring 32, the first pad 33, the first fastening bolt 35 form, and the first armature 25 passes through First fastening bolt 35 links together with the first bottom plate 27, the first valve element 28, cloth between the first armature 25 and the first bottom plate 27 One layer of first pad 33 is equipped with, the top of the first bottom plate 27 is provided with four relief grooves 34, and the first spring base 26 is arranged on first The top of bottom plate 27, its internal side surface are in contact with the side surface of the first armature 25, the both ends of electromagnet master reset spring 5 Respectively in the annular groove of the spring base 26 of electromagnet 2 and first, the center of electromagnet 2 is provided with the straight trough of certain depth, electromagnet 2 The first guide finger 24 between the first armature 25 is arranged in inside straight trough, cloth between the top of the first guide finger 24 and electromagnet 2 The auxiliary back-moving spring 4 of electromagnet is equipped with, the center of the first guide finger 24 is provided with first pressure balance pipe 31, is arranged in the first armature 25 Center, itself and the first armature 25 are fixed up using jump ring 32, circumferential the is opened on the first fin 29 of the first valve element 28 One tonifying Qi hole 54 simultaneously sets the first diversion angle of cone 36 at the first tonifying Qi hole 54, and the first seal band is provided with the first valve element 28 30, the integral arrangement of the first valve element assembly 7 is below electromagnet 2, the first valve element of lower surface of the first valve element assembly 7 when initial 28 lower surfaces are brought into close contact with the upper surface of valve seat 23.

As shown in figure 4, the second foregoing valve element assembly 21 is by the second guide finger 37, the second armature 38, second spring seat 39th, the second bottom plate 40, the second valve element 41, the second armature back-moving spring 45, the second pad 46 and the second fastening bolt 48 form, and are Ensure that the second guide finger 37 is smoothly moved, multiple valve pistons 17 are arranged symmetrically in the lower section of the second guide finger 37, corresponding multiple Fluid power amplifier is arranged in the lower section of the second guide finger 37, and symmetrical number is even number, in the effect of valve piston support spring 16 Under, the upper surface of valve piston 17 is brought into close contact with the lower surface of the second guide finger 37 in the second valve element assembly 21, the second guide finger 37 centers are provided with second pressure balance pipe 44, are arranged in the through hole at the center of dividing plate 6, and the lower end of the second guide finger 37 is connected by screw thread Connect and be fixed together with the second armature 38, the second armature 38 passes through the second fastening bolt 48 and the second bottom plate 40, the second valve element 41 Link together, one layer of second pad 46 is disposed between the second armature 38 and the second bottom plate 40, the top of the second bottom plate 40 is provided with Four second pressure compensating grooves 47, second spring seat 39 are arranged on the top of the second bottom plate 40, its internal side surface and second The side surface of armature 38 is in contact, and the both ends of the second armature back-moving spring 45 are respectively positioned at the ring of dividing plate 6 and second spring seat 39 In shape groove, circumferential second tonifying Qi hole 56 is opened on the second fin 42 of the second valve element 41 of the lower section of the second bottom plate 40 and in the second tonifying Qi Second diversion angle of cone 49 is set at hole 56, is provided with the second seal band 43 on the second valve element 41, the second valve element assembly 21 is whole Body is arranged in the lower section of control valve rod 12.

As shown in figure 5, combustion gas is in a kind of combined electromagnetic piezoelectricity fuel gas injection valve, first, by bypassing air inlet on valve body 1 Mouth 50 enters, and is flowed into along diversion cavity 51 inside valve body 1, a portion is put down by first pressure compensating groove 34, second pressure The groove 47 that weighs flows into the inner space of the first valve element assembly 7 and the second valve element assembly 21, full of the first valve element assembly 7, the The pressure stabilizing cavity 9 of the center lower end of two valve element assembly 21, due to first pressure balance pipe 31 and second pressure balance pipe 44 In the presence of this Some gases can also flow to the superjacent air space of the first valve element assembly 7 and the second valve element assembly 21, the first valve element group The fit inner space of 7, second valve element assembly 21 and ft connection, avoid it by extra axial force.Another part combustion gas Flowed into by the mixed admission mode in the axially main tonifying Qi hole 54 of air drain 57 and first, the second tonifying Qi hole 56 rapidly, full of multiple tracks first The pressure stabilizing cavity 9 of ring cavity 53, the second ring cavity 55 and valve seat 23 at the first seal band 30 and the both ends of the second seal band 43, just The first valve element 28, the second valve element 41 are fitted close with valve seat 23 during the beginning, and the first ring cavity 53, the second ring cavity 55 and outlet annulus 22 are attached Near-ring chamber does not connect, and the first valve element 28, the second valve element 41 lift and taken a seat and control the first ring cavity 53, the second ring cavity 55 with going out Break-make near compression ring band 22 between ring cavity.

The second valve element assembly 21 that the first valve element assembly 7, the piezo-electric crystal 11 of the driving of electromagnet 2 drive controls respectively Fuel gas injection process, so that electromagnet 2, piezo-electric crystal 11 work simultaneously as an example, in the fuel gas injection valve course of work, on electromagnet 2 Coil 3, piezo-electric crystal 11 is when being not powered on, resetted in electromagnet master reset spring 5, the auxiliary back-moving spring 4 of electromagnet, guide finger Under spring 13, the pretightning force of the second armature back-moving spring 45 act on, the first valve element assembly 7 and the second valve element assembly 21 are first Beginning, position remained motionless, the first seal band 30 on the first valve element 28 and the combination of the second valve element in the first valve element assembly 7 The lower surface and the upper surface of the outlet annulus 22 of valve seat 23 of second seal band 43 of the second valve element 41 in body 21 are closely pasted Close, now nearby ring cavity not yet connects for the first ring cavity 53, the second ring cavity 55 and outlet annulus 22, and combustion gas is full of fuel gas injection valve Whole space inside valve body 1.After coil 3, piezo-electric crystal 11 in electromagnet 2 are powered, between the armature 25 of electromagnet 2 and first Magnetic loop is formed, electromagnet 2, the first armature 25 are magnetized, and the first armature 25 is overcome electromagnet master reset spring by electromagnetic force 5th, motion, piezo-electric crystal 11 are extended by current excitation upwards for the pretightning force effect of the auxiliary back-moving spring 4 of electromagnet, promote control valve Bar 12, after fluid power amplifier displacement enlargement, the second guide finger 37 is pushed up by the multiple valve pistons 17 being arranged symmetrically Power, in the presence of the pretightning force for overcoming guide finger back-moving spring 13, the second armature back-moving spring 45, smoothly motion upwards, the The upward motion of one armature 25, the second guide finger 37 drives the first valve element assembly 7, the second valve element assembly 21 to transport upwards respectively Dynamic, motion separates with the surface of valve seat 23 upwards for the first valve element 28, the second valve element 41, until the upper surface of the first spring base 26 and dividing plate Contact, untill piezo-electric crystal no longer extends, in whole motion process, the axial movement of the first armature 25 is with circumferentially positioned by the Mating surface between one guide finger 24 and electromagnet 2 realizes, the axial movement of the second guide finger 37 is with circumferentially positioned by the Mating surface between two guide fingers 37 and dividing plate 6 realizes that now gas circuit is opened, fuel gas injection valve is opened, and combustion gas is rapidly by axle Mixed admission mode to the main tonifying Qi hole 54 of air drain 57 and first, the second tonifying Qi hole 56 flows into, and passes through the first ring cavity of multiple tracks 53, Two ring cavities 55, the pressure stabilizing cavity 9 on valve seat 23 inhibit fluctuation of the gaseous-pressure in flow process, and last combustion gas is by gas outlet 52 Vertical outflow；Combustion gas spray it is a certain amount of after, coil 3, piezo-electric crystal 11 in electromagnet 2 start to power off, the first armature 25 by Electromagnetic force disappears, and under the pretightning force effect of electromagnet master reset spring 5, the auxiliary back-moving spring 4 of electromagnet, the first armature 25 is downward Motion, the first valve element assembly 7 is driven to move downward, piezo-electric crystal 11 loses current excitation and starts to shorten, the second guide finger 37 Guide finger back-moving spring 13, the second armature back-moving spring 45 pretightning force in the presence of start to move downward, drive the second valve Core assembly 21 moves downward, until second in the first valve element 28, the second valve element assembly 21 in the first valve element assembly 7 The lower surface of valve element 41 is bonded to each other with the upper surface of valve seat 23, and all parts in fuel gas injection valve return to initial position, and gas circuit is closed Close, fuel gas injection valve is closed.

From the above-mentioned course of work, a kind of combined electromagnetic piezoelectricity fuel gas injection valve of the utility model, electromagnet 2 drives The first valve element assembly 7 share a valve body 1 and valve seat 23 with the second valve element assembly 21 that piezo-electric crystal 11 drives, use The motion of two kinds of different modes of electromagnetism, Piezoelectric Driving, separately valve element assembly corresponding to control, can quickly be realized The switching of fuel gas injection when single spool or double spool lift, it ensure that fuel gas injection valve to fuel oil using the characteristic of piezo-electric crystal 11 The control accuracy of emitted dose, electromagnetic drive coordinate the same-action of Piezoelectric Driving one to ensure that the big emitted dose of the combustion gas of fuel gas injection valve It is required that to the different demands of fuel gas injection amount when meeting internal combustion engine different capacity；The utility model is used with pressure stabilizing cavity 9 The structure of valve seat 23, it can effectively inhibit the fluctuation of gaseous-pressure inside fuel gas injection valve, ensure that fuel gas injection valve jet The stability of pressure.

A kind of combined electromagnetic piezoelectricity fuel gas injection valve of the utility model, including valve body, electromagnet, coil, electromagnet master The auxiliary back-moving spring of back-moving spring, electromagnet, the first valve element assembly, O-ring seal, fixed block, piezo-electric crystal, control valve rod, lead To pin back-moving spring, big piston, big piston support spring, valve piston support spring, valve piston, sealing ring, sleeve, the second valve element Assembly and valve seat, electromagnet, fixed block are linked together by screw thread and valve body so that electromagnet is fixed on valve body left half Portion centers position, fixed block are fixed on valve body right half part center, and in the left-half of valve body, coil is wrapped in electricity In annular groove inside magnet, electromagnet arranged beneath has the first valve element assembly, between electromagnet and the first valve element assembly Electromagnet master reset spring and the auxiliary back-moving spring of electromagnet are disposed with, the first valve element assembly lower surface and valve seat left half when initial Partial upper surface is brought into close contact, and the valve seat of lower section is provided with bolt hole, and one is fixedly connected on using the valve body above bolt and its Rise, the upper surface of valve seat and the lower surface of valve body, i.e. mating surface between valve seat and valve body are disposed with O-ring seal to ensure two Sealing between person, valve seat is in the center lower end of the first valve element assembly and the first sealing ring close to the first valve element Both ends are provided with pressure stabilizing cavity at band, inside the pressure stabilizing cavity of the center lower end of the first valve element assembly and the first valve element assembly Combustion gas space be connected, and the pressure stabilizing cavity at both ends is connected with valve inner space at the seal band of the first valve element； In the right half part of valve body, fixed block is provided with the straight trough of certain depth in center, and piezo-electric crystal is arranged therein, straight The less through hole of a diameter is provided with above groove, for arranging connecting wires for piezo-electric crystal and valve body outer control unit, piezo-electric crystal Lower section close arrangement has control valve rod, controls the lower surface of valve rod to be in contact with big piston upper surface, guide finger back-moving spring, Under the pretightning force effect of big piston support spring, piezo-electric crystal lower surface and control valve rod upper surface, control valve rod lower surface with Big piston upper surface is brought into close contact together, and sleeve upper end 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 are arranged in the thick outlet of sleeve, and big piston support spring is located at big plunger flange Between sleeve, ensure that big piston integrally will not enter in sleeve, the hydraulic oil with certain pressure, sleeve are filled with sleeve Thin outlet above be disposed with valve piston, valve piston lower end is arranged therein, and is disposed between valve piston flange and sleeve small Piston support spring, to ensure that valve piston integrally will not enter in sleeve, between big piston, valve piston side surface and sleeve lining Sealing ring is disposed with, to prevent the leakage of hydraulic oil in sleeve, big piston, valve piston, big piston support spring, valve piston support Spring has together constituted with the fluid power amplifier of piezo-electric crystal with sleeve, and fluid power amplifier is as an integral arrangement in valve body interval The top of plate, control valve rod has been sequentially arranged the second valve element assembly, valve seat from top to bottom below center, in valve piston branch Under the pretightning force effect for supportting spring, valve piston upper surface and the upper end of the second valve element assembly are brought into close contact, the second valve when initial Core assembly lower surface is brought into close contact with valve seat right half part upper surface, and valve seat is below the center of the second valve element assembly And pressure stabilizing cavity is provided with the second seal band both ends of the second valve element, below the center of the second valve element assembly Pressure stabilizing cavity be connected with the combustion gas space inside the second valve element assembly, and pressure stabilizing cavity and valve at the second seal band both ends Body inner space is connected；The first foregoing valve element assembly is by the first guide finger, the first armature, the first spring base, the first bottom Plate, the first valve element, jump ring, the first pad, the first fastening bolt composition, the first armature pass through the first fastening bolt and the first bottom Plate, the first valve element are linked together, and one layer of first pad is disposed between the first armature and the first bottom plate, is opened above the first bottom plate There are four relief grooves, the first spring base is arranged on the top of the first bottom plate, its internal side surface and the side of the first armature Surface is in contact, and the both ends of electromagnet master reset spring are located in the annular groove of electromagnet and the first spring base respectively, electromagnet Center is provided with the straight trough of certain depth, and the first guide finger between electromagnet and the first armature is arranged in inside straight trough, and first leads The auxiliary back-moving spring of electromagnet is disposed between electromagnet above to pin, the first guide pin centre is provided with first pressure balance pipe, The center of the first armature is arranged in, itself and the first armature are fixed up using jump ring, on the first fin of the first valve element Open circumferential first tonifying Qi hole and the first diversion angle of cone is set at the first tonifying Qi hole, the first sealing ring is provided with the first valve element Band, the first valve element assembly integral arrangement is below electromagnet, when initial under first the first valve element of valve element assembly lower surface Surface is brought into close contact with valve seat upper surface；The second foregoing valve element assembly is by the second guide finger, the second armature, second spring Seat, the second bottom plate, the second valve element, the second armature back-moving spring, the second pad and the second fastening bolt composition, to ensure that second leads It is smoothly moved to pin, multiple valve pistons are arranged symmetrically in below the second guide finger, and corresponding multiple fluid power amplifiers are arranged in Below second guide finger, symmetrical number is even number, in the presence of valve piston support spring, valve piston upper surface and second The second guide finger lower surface in valve element assembly is brought into close contact, and the second guide pin centre is provided with second pressure balance pipe, arrangement In the through hole at dividing plate center, the second guide finger lower end is connected through a screw thread to be fixed together with the second armature, and the second armature leads to Cross the second fastening bolt to link together with the second bottom plate, the second valve element, one layer is disposed between the second armature and the second bottom plate Second pad, the second bottom plate top are provided with four second pressure compensating grooves, and second spring seat is arranged on the top of the second bottom plate, its Internal side surface is in contact with the side surface of the second armature, and the both ends of the second armature back-moving spring are located at dividing plate and second respectively In the annular groove of spring base, circumferential second tonifying Qi hole is opened on the second fin of the second valve element below the second bottom plate and is mended second Second diversion angle of cone is set at stomata, is provided with the second seal band on the second valve element, the second valve element assembly integral arrangement exists Control the lower section of valve rod；Combustion gas is entered by bypassing air inlet on valve body, flows into valve inner along diversion cavity, a portion is led to The inner space of first pressure compensating groove, second pressure compensating groove the first valve element assembly of inflow and the second valve element assembly is crossed, Pressure stabilizing cavity full of first, second valve element assembly center lower end, because first pressure balance pipe and second pressure balance The presence in hole, this Some gases can also flow to the superjacent air space of the first valve element assembly and the second valve element assembly, the first valve element Assembly, the second valve element assembly inner space and ft connection, avoid it by extra axial force.Another part combustion gas is fast Speed is flowed into by axially main air drain and the first tonifying Qi hole, the mixed admission mode in the second tonifying Qi hole, full of the ring cavity of multiple tracks first, second The pressure stabilizing cavity of ring cavity and valve seat at the first seal band and the second seal band both ends, the first valve element, the second valve when initial Core is fitted close with valve seat, and the first ring cavity, the second ring cavity do not connect with outlet adjacent annular bands ring cavity, the first valve element, the second valve element The break-make controlled between the first ring cavity, the second ring cavity and outlet adjacent annular bands ring cavity of lifting and take a seat.

Claims (3)

1. a kind of combined electromagnetic piezoelectricity fuel gas injection valve, it is characterized in that：Including valve body, valve seat, dividing plate, electromagnetism valve portion, pressure Electric part, valve seat are fixed on below valve body, and dividing plate is set in the middle part of valve body, first through hole and the second through hole are set on dividing plate；

The electromagnetism valve portion includes electromagnet, the first valve element assembly, and electromagnet is located in the valve body above dividing plate and and valve Body upper end is fixed, wound around coil in electromagnet, and the first valve element assembly is located in the valve body below dividing plate, the first valve element assembly Including the first armature, the first spring base, the first bottom plate, the first valve element, the first guide finger, the first armature, the first bottom plate, the first valve Core arranges while linked together by fastening bolt that the first spring base is located at outside the first armature and held in the mouth with first from top to bottom Annular groove is formed between iron, annular groove is set inside electromagnet, the both ends of electromagnet master reset spring are arranged in electromagnet Annular groove and the first spring base annular groove in, at the first armature center install the first guide finger, the first guide finger pass through every The first through hole of plate is stretched in electromagnet, the setting auxiliary back-moving spring of electromagnet in electromagnet, and the two of the auxiliary back-moving spring of electromagnet End contacts electromagnet and the first guide finger respectively, and first pressure balance pipe is set in the first guide finger, and the is set on the first bottom plate One relief groove, the first valve element are hollow structure, and the first center pressure stabilizing cavity, the first pressure are set on the valve seat below the first valve element Dynamic balance hole, first pressure compensating groove, the hollow space of the first valve element and the first center pressure stabilizing cavity communicate, and are set on the first valve element Put the first seal band, the first seal band forms the first ring cavity, and the first valve element upper surface opens up the first axial main air drain, and first Circumferential tonifying Qi hole is provided with fin, and the first diversion angle of cone is set at the first tonifying Qi hole；

The piezoelectric includes fixed block, piezo-electric crystal, control valve rod, fluid power amplifier, the second valve element assembly, fixed block The inner upper end of valve body is fixed on, straight trough is provided with the middle part of fixed block, piezo-electric crystal is arranged in straight trough, and fluid power amplifier is arranged on The top of dividing plate, the second valve element assembly are arranged on the lower section of dividing plate, and fluid power amplifier includes big piston, valve piston, sleeve, set Cylinder is arranged on dividing plate, and the end set of sleeve upper end slightly exports, and sleeve upper end tip inside sets thin outlet, and big piston is set In thick outlet, valve piston is arranged in thin outlet, and big piston support spring, small work are set between the flange and sleeve of big piston Valve piston support spring is set between the flange and sleeve of plug, filled with hydraulic oil in the sleeve below big piston, valve piston, second Guide finger passes through the second through hole of dividing plate, and the top of the second guide finger sets control valve rod, the second guide finger and control valve rod it Between guide finger back-moving spring is set, the upper surface and piezo-electric crystal for controlling valve rod fit together, control valve rod lower surface and Big piston upper surface fits together, and valve piston upper surface fits together with the second guide finger, and the second valve element assembly includes Second armature, second spring seat, the second bottom plate, the second valve element, the second armature, the second bottom plate, the second valve element are arranged from top to bottom Linked together simultaneously by fastening bolt, second spring seat is located at outside the second armature and annular is formed between the second armature Groove, dividing plate lower surface set annular groove, and the both ends of the second armature back-moving spring are arranged in the annular groove and spring base of dividing plate Annular groove in, the second guide finger is mutually fixed with the second armature, in the second guide finger set second pressure balance pipe, the second bottom plate Upper setting second pressure compensating groove, the second valve element is hollow structure, and the second center voltage stabilizing is set on the valve seat below the second valve element Chamber, second pressure balance pipe, second pressure compensating groove, the hollow space of the second valve element and the second center pressure stabilizing cavity communicate, the Second seal band and the second fin are set on two valve elements, and the second seal band forms the second ring cavity, and the second valve element upper surface is opened If the second main air drain in axial direction, be provided with the second circumferential tonifying Qi hole, and the second deflection cone is set at the second tonifying Qi hole on the second fin Angle；

Outlet annulus is set on valve seat, and outlet annulus is located at below the first ring cavity and the second ring cavity, is set out below outlet annulus Gas port.

2. a kind of combined electromagnetic piezoelectricity fuel gas injection valve according to claim 1, it is characterized in that：The outer end of valve seat is set End pressure stabilizing cavity.

3. a kind of combined electromagnetic piezoelectricity fuel gas injection valve according to claim 1 or 2, it is characterized in that：Below dividing plate Bypass air inlet is set on valve body, the body portion connected with bypass air inlet is diversion cavity, and combustion gas is entered by bypass air inlet, Valve inner is flowed into along diversion cavity, a portion flows into the first valve by first pressure compensating groove, second pressure compensating groove The inner space of core assembly and the second valve element assembly, full of the first pressure stabilizing cavity, the second pressure stabilizing cavity, end pressure stabilizing cavity, cocurrent To the first valve element assembly and the superjacent air space of the second valve element assembly, another part combustion gas is by the main air drain in the first axial direction, second Axially main air drain and the first tonifying Qi hole, the mixed admission mode in the second tonifying Qi hole flow into, full of the first ring cavity, the second ring cavity and valve The end pressure stabilizing cavity of seat；

When electromagnetism valve portion works independently, when coil is not powered on, in electromagnet master reset spring and the auxiliary back-moving spring of electromagnet Pretightning force effect under, the upper surface of seal band and valve seat on the first valve element is fitted close, and combustion gas is full of valve inner；Line After circle is powered, the first armature is acted on by upward electromagnetic force, and the first valve element assembly is overcoming electromagnet master reset spring, electricity Moved upwards after the pretightning force of the auxiliary back-moving spring of magnet, the first valve element is separated with valve base surface, and fuel gas injection valve is opened, and gas circuit is opened Open, combustion gas by first axially the mixed admission mode in main air drain and the first circumferential tonifying Qi hole flow into, by the first ring cavity, finally by Vertically flow out gas outlet；After coil blackout, under the effect of the pretightning force of electromagnet master reset spring and the auxiliary back-moving spring of electromagnet, First armature moves downward, and the first valve element assembly integrally moves downward, until the first spool face is bonded with valve base surface, weight New to return to initial position, fuel gas injection valve is closed, and gas circuit is closed；

When piezoelectric works independently, when piezo-electric crystal is not powered on, the upper table of the second seal band and valve seat on the second valve element Face is fitted close, and combustion gas is full of inside gas valve body；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, the second guide finger is also moved upwards, and band the second movable valve plug assembly moves upwards, and fuel gas injection valve is opened, and gas circuit is opened, directly Hydraulic fluid pressure in sleeve returns to original state, and big piston and valve piston no longer move, and the second valve element assembly stops therewith Only, combustion gas by second axially the mixed admission mode in main air drain and the second circumferential tonifying Qi hole flow into, by the second ring cavity, finally by Vertically flow out gas outlet；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, hydraulic fluid pressure declines in sleeve, and in the presence of guide finger back-moving spring, the second guide finger moves downward, Valve piston, the second valve element assembly move downward therewith, big piston, small until hydraulic fluid pressure returns to original state in sleeve Piston returns to initial position, and the second valve element assembly returns to initial position, and the second spool face is bonded with valve base surface, gas injection Valve closing is penetrated, gas circuit is closed；

It is identical when its respective action is with each working independently when electromagnetism valve portion and piezoelectric work together.