CN206352551U - Resonance orifice-plate type electric-controlled fuel injector - Google Patents
Resonance orifice-plate type electric-controlled fuel injector Download PDFInfo
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- CN206352551U CN206352551U CN201720056852.1U CN201720056852U CN206352551U CN 206352551 U CN206352551 U CN 206352551U CN 201720056852 U CN201720056852 U CN 201720056852U CN 206352551 U CN206352551 U CN 206352551U
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Abstract
The purpose of this utility model is to provide resonance orifice-plate type electric-controlled fuel injector, including oil injector body, current limliting valve module, electromagnetic valve component, needle valve assembly.Pressure accumulation chamber is provided with oil injector body, is connected with main fuel feed hole with current limliting valve module, it is ensured that during big pulsewidth oil spout, the stabilization of each cylinder injection process.Current limliting valve module is arranged on below pressure accumulation chamber, it is to avoid the abnormal progress for continuing oil spout.Flow-limiting valve component bottom is machined with resonant through holes and resonance throttle orifice, efficiently reduces the fluctuation of the fuel oil by current limliting valve module.Oil injector body bottom processing electromagnetic valve component drives stem movement by electromagnetic force, can realize flexible Injection strategy and the injection process that response is fast, control accuracy is high.By orifice throttle hole, the two-way oil-feed of annular side oil circuit, accelerate building for control chamber and press through journey, improve the response speed that needle-valve is taken a seat.The AND DEWATERING FOR ORIFICE STRUCTURE of processing, efficiently reduces the dynamic recirculating oil quantity in injection process, the characteristics of realizing On Fluctuations oil return in needle valve assembly.
Description
Technical field
The utility model relates to a kind of engine fueling injection equipment, specifically high-pressure common rail oil injection device.
Background technology
Start progressively to use high speed electromagnetic valve type fuel injector in the market to adapt to newest Abgasgesetz.It is this automatically controlled
The characteristics of fuel injector is protruded is the electric signal control high-speed electromagnetic valve exported using ECU, to realize flexible oil spout rule
Rule.Using the fuel injector of high-speed electromagnetic valve, its faster system response, control accuracy is high, the ability with multi-injection.But this electricity
Controlling fuel injector, there is also area for improvement：In injection process, there is high pressure fuel always and flow through into and out of oily throttle orifice.
This partial high pressure fuel oil is pressurizeed by oil pump, is not done work but and is returned directly to fuel tank, and dynamic recirculating oil quantity is big, causes energy to damage
Lose.
In addition, the accurate control of multi-injection fuel injection characteristic is the sharpest edges of diesel engine high-pressure co-rail electronic control injection system
And key technology.In high pressure co-rail system multi-injection, surge pressure fluctuation caused by injection directly influences multi-injection reason
Think the realization of fuel injection characteristic, and then influence the performance of diesel engine.
The content of the invention
The purpose of this utility model is to provide in multi-injection, can guarantee that fuel pressure fluctuation is small, while can realize
On Fluctuations oil return, needle-valve quick response and the resonance orifice-plate type electric-controlled fuel injector without static leakage function.
What the purpose of this utility model was realized in：
The utility model resonance orifice-plate type electric-controlled fuel injector, it is characterized in that：Including injector head, oil injector body, flow-limiting valve
Component, electromagnetic valve component, needle valve assembly, descending high-pressure oil passage, injector head are arranged on above oil injector body, inside injector head
Set and pressure accumulation chamber is set inside main fuel feed hole, oil injector body, main fuel feed hole is communicated with pressure accumulation chamber, and current limliting valve module is arranged on pressure accumulation
In chamber, electromagnetic valve component, needle valve assembly are installed in oil injector body lower end successively, and tight cap is located at electromagnetic valve component, outside needle valve assembly,
The mode that the upper end of tight cap is connected through a screw thread is connected with oil injector body bottom；
The current limliting valve module includes limit spring seat, current limliting piston, ball valve return spring holder, support and control sliding block, limit
Position spring base, current limliting piston, ball valve return spring holder are arranged from top to bottom, are installed and are damped between limit spring seat and current limliting piston
Spring, support and control sliding block is arranged in ball valve return spring holder, is set between the upper end of support and control sliding block and current limliting piston
Mounting ball valve back-moving spring, current limliting piston between ball valve, the lower end of support and control sliding block and ball valve return spring holder below
In set to set in piston blind hole and metering hole, support and control sliding block and set humorous in axial central through hole, ball valve return spring holder
Shaken through hole and resonance throttle orifice, and transition oil pocket, piston blind hole are set between ball valve return spring holder and oil injector body below
Pressure accumulation chamber and metering hole are connected, metering hole is connected or disconnected under the control of ball valve with axial central through hole, resonant through holes are harmonious
The throttle orifice that shakes connects axial central through hole and transition oil pocket；
The electromagnetic valve component includes winding on electromagnet, coil, armature, balance valve rod, valve seat, intermediate mass, electromagnet
Set above coil, electromagnet and armature is set below magnetic valve return spring holder, electromagnet, armature and magnetic valve return spring holder
Between magnetic valve back-moving spring is set, balance valve rod is located in valve seat, and balance valve rod upper end and armature are connected, and intermediate mass is set
Spill port, middle oil circuit, descending fuel feed hole be set below valve seat, in intermediate mass, spill port under the control of balance valve rod with
Fuel tank is connected or disconnected；
The needle valve assembly includes needle-valve stop collar, orifice plate, needle-valve body, nozzle, and needle-valve stop collar is located in nozzle, orifice plate
In needle-valve stop collar, the upper part of needle-valve body is located in needle-valve stop collar, and the lower part of needle-valve body is located in nozzle, orifice plate
Formed between needle-valve body and bossing, lug boss are set in the middle part of providing holes sheet reset spring in control chamber, control chamber, needle-valve body
Divide and needle-valve back-moving spring be set between the needle-valve stop collar above it, the upper surface of orifice plate sets low pressure port, high-pressure mouth respectively,
Throttle orifice is set, and throttle orifice is respectively communicated with low pressure port and control chamber, high-pressure mouth connects descending fuel feed hole in orifice plate, orifice plate with outside it
Side oil circuit is formed between the needle-valve stop collar in portion, oil holding slot is formed between needle-valve body and nozzle, nozzle-end sets spray orifice；
Middle oil communication low pressure port, descending high-pressure oil passage upper end connection transition oil pocket, through oil injector body, valve seat, in
Between block, nozzle connection oil holding slot, descending fuel feed hole connects descending high-pressure oil passage.
The utility model can also include：
1st, during spray orifice oil spout, the fuel pressure of transition oil pocket declines, current limliting piston, ball valve, support and control sliding block it is overall to
Bottom offset, and ball valve is not landed on ball valve return spring holder, metering hole is communicated with axial central through hole；The combustion flowed out when spray orifice
When oil quality exceedes threshold value, current limliting piston compresses ball valve and it is seated at ball valve return spring holder, metering hole and axial centre
Through hole disconnects；When spray orifice stops oil spout, in the presence of ball valve back-moving spring, current limliting piston, ball valve and support and control sliding block are whole
Body returns to initial position.
2nd, during coil electricity, balance valve rod is moved upwards, and spill port and fuel tank are that the fuel oil in connected state, control chamber leads to
Oil circuit and spill port oil return are to fuel tank in the middle of crossing, and needle-valve body is lifted up, and spray orifice opens oil spout；After coil blackout, valve rod is balanced
Move downward, be crushed on intermediate mass upper surface in the effect of magnetic valve back-moving spring, spill port disconnects with fuel tank.
3rd, the diameter in the middle part of resonance throttle orifice is less than the diameter at its two ends, and less than the diameter of resonant through holes, resonance throttling
Hole is consistent with the total length of resonant through holes axial direction.
Advantage of the present utility model is：The utility model employs the structure of orifice plate built in control chamber.This orifice plate
Structure can significantly decrease the dynamic recirculating oil quantity of injection process intermediate fuel oil, significantly reduce energy loss, improve system
Economy.The utility model employs pressure accumulation cavity configuration, can substantially improve the pressure oscillation of whole injection system, particularly
Interfering with each other when can reduce each fuel injector oil spout.Current limliting valve module is employed in the utility model structure, is prevented effectively from
The generation of the abnormal conditions such as abnormal injection, and in current limliting valve module resonance structure is added, reduce fuel pressure
Fluctuation, it is ensured that the reliability of fuel economy and fuel injector work is improved while the injection process of normal table.This practicality
It is new to balance valve rod to adjust the switch of oil return circuit by solenoid valve control, be conducive to improving response speed and the control of needle-valve
Precision effectively improves the discharge stability and economy of diesel engine there is provided flexible fuel injection characteristic.Inside nozzle segment
It is hydro-cushion, poor without static pressure, realize function of the fuel injector without static leakage.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is current limliting valve module schematic diagram；
Fig. 3 is electromagnetic valve component schematic diagram；
Fig. 4 is needle valve assembly schematic diagram；
Fig. 5 is A-A views.
Embodiment
Illustrate below in conjunction with the accompanying drawings and the utility model is described in more detail：
With reference to Fig. 1-5, the utility model include injector head 1, current limliting valve module 3, electromagnetic valve component 5, needle valve assembly 6,
Tight cap 9, oil injector body 10.Injector head 1 by screw thread be connected and is arranged on oil injector body 10, and by being placed on
Sealing ring 2 on oil injector body 10 is sealed.Main fuel feed hole 12 is set in injector head 1, and with the storage in oil injector body 10
Pressure chamber 11 is connected.The lower section of pressure accumulation chamber 11 is provided with current limliting valve module 3.Current limliting valve module 3 is arranged on inside oil injector body 10, and its is main
Structure includes back-up ring 13, damping spring 14, ball valve 16, support and control sliding block 17, ball valve back-moving spring 22, ball valve back-moving spring
Seat 23, current limliting piston 24, limit spring seat 26.Wherein, metering hole 15 and piston blind hole 25 are processed on current limliting piston 24, axle
Processed to central through hole 18 on support and control sliding block 17, this ensure that fuel oil can smoothly flow to lower section oil circuit.Fuel injector
The lower section of body 10 is sequentially provided with electromagnetic valve component 5, needle valve assembly 6, and assembly connection is carried out by tight cap 9.Electromagnetic valve component 5 is mainly tied
Structure include magnetic valve return spring holder 27, coil 28, armature 29, valve seat 30, intermediate mass 34, balance valve rod 35, electromagnet 36,
Magnetic valve back-moving spring 37.Armature 29 and the balance combination of valve rod 35 are arranged on inside valve seat 30.Spill port 31, descending fuel feed hole
32nd, the processing such as middle oil circuit 33 is inside intermediate mass 34.The primary structure of needle valve assembly 6 positioned at fuel injector bottom includes orifice plate
39th, orifice plate back-moving spring 40, needle-valve stop collar 41, needle-valve body 42, nozzle 43, needle-valve back-moving spring 44.The same needle-valve of intermediate mass 34
Stop collar 41 and the formation control chamber 45 of needle-valve body 42.Orifice plate 39 is positioned in control chamber 45.Needle-valve body 42 is arranged in nozzle 43,
The upper end of needle-valve body 42 for being cased with needle-valve back-moving spring 44 is arranged in needle chamber, is set between needle-valve body 42 and nozzle 43 and is contained oil
Groove 8.
Fig. 1 is to be provided with the overall structure diagram of the utility model pressure accumulation orifice-plate type electric-controlled fuel injector, oil injector body 10
Pressure accumulation chamber 11, pressure accumulation chamber 11 is connected with the main fuel feed hole 12 on injector head 1.Oil pocket passes sequentially through piston in current limliting piston 24
Blind hole 25 and the metering hole 15 being opened in thereon are connected with pressure accumulation chamber 11.Injector head 1 is entered with oil injector body 10 by threaded line
Luggage is matched somebody with somebody, and sealing ring 2 is sealed the two.When the high pressure fuel that conveying is come in is entered inside fuel injector by main fuel feed hole 12
When, current limliting valve module 3 can be passed through downwards by the fuel oil in pressure accumulation chamber 11.Fuel oil flows through descending after the outflow of current limliting valve module 3
High-pressure oil passage 4 enters control chamber 45 and oil holding slot 8.The lower section of oil injector body 10 has been sequentially arranged electromagnetic valve component 5, needle valve assembly 6.
In electromagnetic valve component 5, armature 29 is controlled by electromagnetic force and lifting and taking a seat for valve rod 35 is balanced.When coil 28 is powered
When, balance valve rod 35 is lifted up, and spill port 31 is opened, and the intermediate fuel oil of control chamber 45 flows through throttle orifice 46 and middle oil circuit successively
33, pass through the draining of spill port 31.Therefore the fuel pressure of control chamber 45 declines, with pressure initiation fuel oil pressure difference in oil holding slot 8 so that
Needle-valve body 42 is lifted, fuel injection beginning.During being somebody's turn to do, needle-valve stop collar 41 plays a part of limiting the displacement of needle-valve body 42.Coil
During 28 power-off, balance valve rod 35 is downwards when taking a seat, and spill port 31 is closed, and fuel oil enters side downstream by descending fuel feed hole 32
High-pressure mouth 38, high-pressure mouth 38 surrounds circular low pressure port 48 in the rear surface of intermediate mass 34 one annular oil groove of formation.Annular oil
The oil pressure of groove and the high pressure fuel in circular low pressure port 48 and oil pressure formation pressure difference in control chamber 45 so that orifice plate 39 overcomes orifice plate
The spring force of back-moving spring 40 is moved downward, and opens the side oil circuit 47 of orifice plate 39.Flow through middle oil circuit 33 and descending oil-feed
The high pressure fuel in hole 32 quickly enters control chamber 45 by annular side oil circuit 47 and the two-way of throttle orifice 46, and quickly sets up oil
Pressure so that needle-valve body 42 is taken a seat, so as to terminate injection process.Needle-valve body 42 is arranged on inside nozzle 43, and resets bullet by needle-valve
Spring 44 is compressed.Nozzle 43 and electromagnetic valve component 5 are all arranged on inside tight cap 9, and are fastened by oil injector body 10 and threaded line.Spray
The internal hydraulic pressure of mouth 43 balance, it is poor without static pressure, realize function of the fuel injector without static leakage.
Fig. 2 is the utility model flow-limiting valve components structural representation.It by back-up ring 13, damping spring 14, ball valve 16,
Support and control sliding block 17, ball valve return spring holder 23, current limliting piston 24, limit spring seat 26 etc. are constituted.Current limliting valve module 3 passes through
Pressure accumulation chamber 11 is arranged on inside oil injector body 10.Back-up ring 13 not only serves position-limiting action, Er Qieyu to overall current limliting valve module 3
Limit spring seat 26 is coordinated, and on the one hand as the spring base of damping spring 14, on the other hand limits current limliting piston 24
Maximum displacement.Under the initial tension of spring effect of damping spring 14 and ball valve back-moving spring 22, ball valve 16 is with current limliting piston 24
Lower surface and the upper surface of support and control sliding block 17 coordinate.Spring masterpiece of the ball valve return spring holder 23 in ball valve back-moving spring 22
Under, bottom is pressed in, the face of taking a seat of ball valve 16 is formed at its top variable cross-section.High pressure fuel is entered by pressure accumulation chamber 11 to be limited
The piston blind hole 25 in piston 24 is flowed, the axial central through hole 18 that metering hole 15 enters support and control sliding block 17 is flowed through.By axle
The fuel oil flowed out to central through hole 18 enters transition oil pocket 20 by resonant through holes 19 and resonance throttle orifice 21.By setting processing
Resonant through holes 19 and resonance throttle orifice 21, reduce the amplitude of the fuel pressure wave by holes.In addition, the resonance throttling of processing
There is a sector hole footpath smaller compared with resonant through holes 19 in hole 21, therefore restriction effect is stronger, result in the fuel flow rate flowed through from holes
It is different so that the fuel pressure wave of script same-phase generates phase difference, is cancelled out each other after two bursts of fuel pressure wave superpositions, and then
So that pressure oscillation is greatly reduced.From transition oil pocket 20 flow out fuel oil by descending high-pressure oil passage 4 lead to below oil circuit.Work as spray
During oily device normal work, spray orifice 9 sprays fuel oil so that the fuel pressure in transition oil pocket 25 declines.Due to 15 pairs of combustions of metering hole
The throttling action of oil so that the fuel pressure rise in the piston blind hole 25 and pressure accumulation chamber 11 in current limliting piston 24, with bridging oil
The fuel pressure of chamber 20 formation pressure difference, therefore current limliting piston 24, ball valve 16 and the three of support and control sliding block 17 are overall to bottom offset, this
Certain compensation has just been carried out to the fuel oil that fuel injector sprays, but not has caused ball valve 16 to be landed in ball valve return spring holder 23
On.When oil spout is stopped, as fuel oil flows through metering hole 15, the pressure difference of the upper and lower surface of current limliting piston 24 can be gradually reduced,
In the presence of ball valve back-moving spring 22, current limliting piston 24, ball valve 16 and the three of support and control sliding block 17 return to initial bit again
Put.When the continual injection fuel oil of spray orifice 7, the fuel oil quality of outflow exceedes threshold value so that abnormal work shape occurs in fuel injector
During state, the oil pressure of the lower section transition oil pocket 20 of current limliting piston 24 declines rapidly, and pressure difference above and below formation causes current limliting piston 24 to compress
Ball valve 16 is landed on ball valve return spring holder 23, prevents fuel oil to continue to circulate.Due to having cut off fuel delivery, fuel injector stops
Only work, the occurrence of this just reduces abnormal injection to a certain extent, improve fuel economy and fuel injector work
Stability.
Fig. 3 is the utility model electromagnetic valve component part-structure schematic diagram.It is by magnetic valve return spring holder 27, coil
28th, armature 29, valve seat 30, intermediate mass 34, balance valve rod 35, electromagnet 36, magnetic valve back-moving spring 37 etc. are constituted.Magnetic valve is answered
Position spring base 27, coil 28, electromagnet 36 and magnetic valve back-moving spring 37 are built in oil injector body 10, and wherein magnetic valve resets
Spring base 27 is by screw threads for fastening in magnetic valve top.Magnetic valve back-moving spring 37 is in magnetic valve return spring holder 27 and armature
29 therebetween, and armature 29 and balance valve rod 35 are set inside the valve seat 30 of the lower section of oil injector body 10.At intermediate mass 34
In the lower section of valve seat 30.When fuel injector commencement of fuel injection, coil 28 is powered, and with armature 29 and the formation magnetic loop of electromagnet 36, produces
Electromagnetic force, attracts balance valve rod 35 to move up, the spill port 31 in intermediate mass 34 is opened.At this moment, the fuel oil in control chamber 45
Middle oil circuit 33 and the oil return of spill port 31 are passed sequentially through to fuel tank, the fuel pressure of control chamber 45 declines, the upper surface of needle-valve body 40
It is pressurized and reduces, with the fuel pressure formation pressure difference in oil holding slot 8.Needle-valve body 42 is lifted up, and opens the oil spout of spray orifice 7.Work as oil spout
When device stops oil spout, coil 28 is powered off, and because armature 36 is closely as one with balance valve rod 35, therefore they are jointly subjected to electricity
The initial tension of spring effect of magnet valve back-moving spring 37 is moved downward, and is pressed on the upper surface of intermediate mass 34, and has been blocked time
Oilhole 31.At the same time, the oil-feed of descending fuel feed hole 32 inside intermediate mass, flows into lower section needle valve assembly 6.
Fig. 4 is the utility model needle valve assembly part-structure schematic diagram.The primary structure of needle valve assembly 5 includes orifice plate 39, hole
Sheet reset spring 40, needle-valve stop collar 41, needle-valve body 42, nozzle 43, needle-valve back-moving spring 44.Before fuel injection beginning, whole control
Chamber 45 processed is to be in hydrodynamic equilibrium state, is each filled with high pressure fuel.And orifice plate 39 is due to by the spring pre-tightening of orifice plate back-moving spring 40
The effect of power blocks high-pressure mouth 38 by jack-up.When coil 28 is powered, after the balance valve rod 35 of magnetic valve is lifted, spill port 31
Open.The throttle orifice 46 and middle oil circuit 33 that fuel oil in control chamber 45 is flowed through on orifice plate 39 successively carry out oil return.With control
The fuel pressure of chamber 45 declines, and needle-valve body 42 overcomes the initial tension of spring of needle-valve back-moving spring 42 to be lifted up, commencement of fuel injection.
In injection process, the presence of throttle orifice 46 make it that the fuel pressure in control chamber 45 is higher than the fuel pressure in middle oil circuit 33,
The making a concerted effort of its pressure difference value and spring force it is enough to overcome the fuel pressure in the annular oil groove of the formation of high-pressure mouth 38, so,
Orifice plate 39 is pressed on the lower surface of intermediate mass 32 always, has blocked the annular oil groove that descending fuel feed hole 32 enters side downstream,
The entrance of high pressure fuel is prevented, the high pressure fuel amount that low-pressure reservoir is flowed back in injection process is effectively reduced.When coil 28
Power-off, after the balance valve rod 35 of magnetic valve is taken a seat, spill port 31 is plugged.Because oil pressure is higher than middle oil circuit 33 in control chamber 45
Oil pressure, in the presence of pressure difference, fuel oil is back in middle oil circuit 33 in control chamber 45, and the middle fuel pressure of oil circuit 33 rises
Until pressure difference zero.The inner high voltage fuel oil of high-pressure mouth 38 is with the fuel pressure formation pressure difference in control chamber 45 so that orifice plate 39 overcomes
The initial tension of spring of orifice plate back-moving spring 41, orifice plate 39 moves down opening, at the same time, the peripheral circular side oil circuit 47 dozens of orifice plate 39
Open.High pressure fuel flows through descending fuel feed hole 32, enters control chamber 45, control by throttle orifice 46 and the two-way of annular side oil circuit 47
Oil pressure is quickly set up in chamber 45, and needle-valve is taken a seat rapidly, and oil spout stops.
Fig. 5 is the section A-A enlarged drawing of needle-valve body 42.Its arcwall face can be very good to play guide effect.
In the above-mentioned course of work, the injection process of the utility model resonance orifice-plate type electric-controlled fuel injector, it is built in
The structure of orifice plate 39 in needle valve assembly 6, substantially reduces the dynamic recirculating oil quantity in injection process, it is ensured that the spy of On Fluctuations oil return
Point.By the two-way oil-feed of the throttle orifice 46, annular side oil circuit 47 of orifice plate 39, accelerate building for control chamber 45 and press through journey, carry
The response speed that high needle-valve is taken a seat.Oil injector body 10 built with current limliting valve module 3, effectively prevent abnormal injection state
Lasting progress, wherein, the addition of resonance structure effectively reduces fuel pressure fluctuation, it is ensured that the stability of the course of work with
Fuel economy.Whole injection process uses solenoid valve control, using motion of the electromagnetic force with acting balancing valve bar 35, realizes pair
Injection process fast response time, control accuracy is high, the requirement of variable fuel injection characteristic.The utility model is applied on common rail system
When, under big oil mass spray regime, common rail pressure fluctuation can be effectively reduced using the structure of pressure accumulation chamber 11, so as to reduce each cylinder
The uniformity and stability of injection process decline the generation of phenomenon.
Claims (5)
1. resonance orifice-plate type electric-controlled fuel injector, it is characterized in that：Including injector head, oil injector body, current limliting valve module, solenoid valve block
Part, needle valve assembly, descending high-pressure oil passage, injector head are arranged on above oil injector body, and main fuel feed hole is set inside injector head,
Pressure accumulation chamber is set inside oil injector body, and main fuel feed hole is communicated with pressure accumulation chamber, and current limliting valve module is arranged in pressure accumulation chamber, oil injector body
Electromagnetic valve component, needle valve assembly are installed in lower end successively, and tight cap is outside electromagnetic valve component, needle valve assembly, and the upper end of tight cap leads to
The mode for crossing threaded connection is connected with oil injector body bottom；
The current limliting valve module includes limit spring seat, current limliting piston, ball valve return spring holder, support and control sliding block, spacing bullet
Spring abutment, current limliting piston, ball valve return spring holder are arranged from top to bottom, and damping bullet is installed between limit spring seat and current limliting piston
Spring, support and control sliding block is arranged in ball valve return spring holder, and ball is set between the upper end of support and control sliding block and current limliting piston
In mounting ball valve back-moving spring between valve, the lower end of support and control sliding block and ball valve return spring holder below, current limliting piston
Set to set in piston blind hole and metering hole, support and control sliding block and resonance is set in axial central through hole, ball valve return spring holder
Transition oil pocket is set between through hole and resonance throttle orifice, ball valve return spring holder and oil injector body below, and piston blind hole connects
Logical pressure accumulation chamber and metering hole, metering hole are connected or disconnected under the control of ball valve with axial central through hole, resonant through holes and resonance
Throttle orifice connects axial central through hole and transition oil pocket；
The electromagnetic valve component includes wound around coil on electromagnet, coil, armature, balance valve rod, valve seat, intermediate mass, electromagnet,
Set above electromagnet and armature is set below magnetic valve return spring holder, electromagnet, between armature and magnetic valve return spring holder
Magnetic valve back-moving spring is set, and balance valve rod is located in valve seat, and balance valve rod upper end is connected with armature, and intermediate mass is arranged on valve
Seat lower section, sets spill port, middle oil circuit, descending fuel feed hole in intermediate mass, spill port under the control of balance valve rod with fuel tank
Connection disconnects；
The needle valve assembly includes needle-valve stop collar, orifice plate, needle-valve body, nozzle, and needle-valve stop collar is located in nozzle, and orifice plate is located at
In needle-valve stop collar, the upper part of needle-valve body is located in needle-valve stop collar, and the lower part of needle-valve body is located in nozzle, orifice plate and pin
Form providing holes sheet reset spring in control chamber, control chamber between valve body, bossing be set in the middle part of needle-valve body, bossing with
Needle-valve back-moving spring is set between the needle-valve stop collar above it, and the upper surface of orifice plate sets low pressure port, high-pressure mouth, orifice plate respectively
In throttle orifice is set, throttle orifice is respectively communicated with low pressure port and control chamber, and high-pressure mouth connects descending fuel feed hole, and orifice plate is outside with it
Side oil circuit is formed between needle-valve stop collar, oil holding slot is formed between needle-valve body and nozzle, nozzle-end sets spray orifice；
Middle oil communication low pressure port, descending high-pressure oil passage upper end connection transition oil pocket, through oil injector body, valve seat, intermediate mass,
Nozzle connects oil holding slot, and descending fuel feed hole connects descending high-pressure oil passage.
2. resonance orifice-plate type electric-controlled fuel injector according to claim 1, it is characterized in that：During spray orifice oil spout, transition oil pocket
Fuel pressure declines, and current limliting piston, ball valve, support and control sliding block are overall to bottom offset, and ball valve is not landed in ball valve reset bullet
On spring abutment, metering hole is communicated with axial central through hole；When the fuel oil quality that spray orifice flows out exceedes threshold value, current limliting piston compresses ball
Valve simultaneously makes it be seated at ball valve return spring holder, and metering hole disconnects with axial central through hole；It is multiple in ball valve when spray orifice stops oil spout
In the presence of the spring of position, current limliting piston, ball valve and support and control sliding block integrally return to initial position.
3. resonance orifice-plate type electric-controlled fuel injector according to claim 1 or 2, it is characterized in that：During coil electricity, valve rod is balanced
Motion upwards, spill port and fuel tank be fuel oil in connected state, control chamber by middle oil circuit and spill port oil return to fuel tank,
Needle-valve body is lifted up, and spray orifice opens oil spout；After coil blackout, balance valve rod is transported downwards in the effect of magnetic valve back-moving spring
It is dynamic, it is crushed on intermediate mass upper surface, spill port disconnects with fuel tank.
4. resonance orifice-plate type electric-controlled fuel injector according to claim 1 or 2, it is characterized in that：It is straight in the middle part of resonance throttle orifice
Footpath is less than the diameter at its two ends, and less than the diameter of resonant through holes, resonance throttle orifice is consistent with the total length of resonant through holes axial direction.
5. resonance orifice-plate type electric-controlled fuel injector according to claim 3, it is characterized in that：Diameter in the middle part of resonance throttle orifice is small
Diameter in its two ends, and less than the diameter of resonant through holes, resonance throttle orifice is consistent with the total length of resonant through holes axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720056852.1U CN206352551U (en) | 2017-01-18 | 2017-01-18 | Resonance orifice-plate type electric-controlled fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720056852.1U CN206352551U (en) | 2017-01-18 | 2017-01-18 | Resonance orifice-plate type electric-controlled fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206352551U true CN206352551U (en) | 2017-07-25 |
Family
ID=59349360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720056852.1U Withdrawn - After Issue CN206352551U (en) | 2017-01-18 | 2017-01-18 | Resonance orifice-plate type electric-controlled fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206352551U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523224A (en) * | 2017-01-18 | 2017-03-22 | 哈尔滨工程大学 | Resonance hole plate type electronic control oil injector |
-
2017
- 2017-01-18 CN CN201720056852.1U patent/CN206352551U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523224A (en) * | 2017-01-18 | 2017-03-22 | 哈尔滨工程大学 | Resonance hole plate type electronic control oil injector |
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