CN106593726A - Resonant electrically controlled oil injector with oil fed through double paths - Google Patents
Resonant electrically controlled oil injector with oil fed through double paths Download PDFInfo
- Publication number
- CN106593726A CN106593726A CN201710034623.4A CN201710034623A CN106593726A CN 106593726 A CN106593726 A CN 106593726A CN 201710034623 A CN201710034623 A CN 201710034623A CN 106593726 A CN106593726 A CN 106593726A
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- Prior art keywords
- oil
- valve
- needle
- fuel
- hole
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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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
- F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
Abstract
The invention provides a resonant electrically controlled oil injector with oil fed through double paths. The resonant electrically controlled oil injector comprises an oil injector head, an oil injector body, a flow-limiting valve assembly, an electromagnetic valve assembly, an injection nozzle and a needle valve body. A pressure storage cavity is formed in the oil injector body and communicates with a main oil inlet and the flow-limiting valve assembly, and it is guaranteed that the oil injection process of each cylinder is stable under the large oil-injection quantity condition. The flow-limiting valve assembly is arranged on the lower portion of the pressure storage cavity, and continuous abnormal oil injection is stopped. The bottom of the oil injector body is provided with a resonant through hole and a resonant throttling hole. Fluctuation of oil passing through the flow-limiting valve assembly is reduced by means of the wave superposition principle. The electromagnetic valve assembly is machined at the bottom of the oil injector body and drives a valve rod to move through electromagnetic force, and a flexible oil injection strategy and an oil spraying process with quick response and high control precision can be achieved. Since oil is fed through the double paths, the dynamic oil return quantity is not increased while it is guaranteed that the pressure building speed of a control cavity is increased and landing response of the needle valve is improved. No static pressure difference or static leakage exists in the oil injector.
Description
Technical field
The present invention relates to a kind of electromotor fueling injection equipment.
Background technology
With the development of modern diesel engine electronic control technology, widely used high speed electromagnetic valve type fuel injector is started on market.This
The characteristics of kind of electric-controlled fuel injector is projected is the function by microcontroller realizing increasingly complex fuel injection characteristic, so as to meet
The requirement of increasingly strict Abgasgesetz.Using the fuel injector of high-speed electromagnetic valve, its faster system response, control accuracy is high, has
Flexible control strategy and reliable service behaviour.But this electric-controlled fuel injector there is also shortcoming：Fuel injector is generally using single
The form of road oil-feed, its needle-valve takes a seat response speed slowly, and due to entering the relation that fuel-displaced throttle orifice aperture mutually restricts, it is desirable to enter
It is more difficult that one step improves response characteristic；Fuel pressure fluctuation can affect the stability of injection process；The form of 2/2-way valve
Dynamic recirculating oil quantity it is larger, affect fuel utilization ratio；There is axial gap between control plunger and needle-valve body, fuel injector can be caused
Interior fuel oil static leakage；, when big oil mass is sprayed, high-pressure common rail oil pressure can big ups and downs for fuel injector.
The content of the invention
It is an object of the invention to provide fuel pressure fluctuation is little, fast response characteristic can be realized and without static leakage function
Two-way oil-feed resonant mode electric-controlled fuel injector.
The object of the present invention is achieved like this：
Two-way oil-feed resonant mode electric-controlled fuel injector of the present invention, 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 is arranged on oil injector body top, inside injector head
Main fuel feed hole is set, and oil injector body inside arranges pressure accumulation chamber, and 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 successively in oil injector body lower end, and tight cap is located at outside electromagnetic valve component, needle valve assembly,
The mode that the upper end of tight cap is 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 slipper, spacing bullet
Spring abutment, current limliting piston, ball valve return spring holder are arranged from top to bottom, install between limit spring seat and current limliting piston and damp bullet
Spring, support slipper is arranged in ball valve return spring holder, and ball valve is arranged between the upper end of support slipper and current limliting piston, is supported and is slided
Mounting ball valve back-moving spring between the lower end of block and ball valve return spring holder below, in current limliting piston arrange piston blind hole and
Metering hole, arranges axial central through hole in support slipper, resonant through holes and resonance throttle orifice, ball are arranged in ball valve return spring holder
Transition oil pocket, piston blind hole connection pressure accumulation chamber and metering hole, limit are set between valve return spring holder and oil injector body below
Discharge orifice is connected or disconnected with axial central through hole under the control of ball valve, and resonant through holes connect axial centre with resonance throttle orifice
Through hole and transition oil pocket；
The electromagnetic valve component includes electric magnet, coil, armature, balance valve rod, valve seat, intermediate mass, winds on electric magnet
Coil, electric magnet top arranges electromagnetic valve return spring holder, and electric magnet lower section arranges armature, armature and electromagnetic valve return spring holder
Between electromagnetic 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 arranged
Below valve seat, balance and formed between the middle part of valve rod and valve seat balance valve rod epicoele, balance the bottom of valve rod, valve seat and
Balance valve rod cavity of resorption is formed between intermediate mass, up fuel feed hole is set in valve seat, arrange in intermediate mass spill port, middle oil duct,
Descending fuel feed hole, up oilhole connection balance valve rod epicoele, middle oil duct connection balance valve rod cavity of resorption, spill port is in balance valve rod
Control under connect or disconnect with middle oil duct and fuel tank；
The needle valve assembly includes needle-valve stop collar, nozzle, needle-valve body, and needle-valve stop collar is located in nozzle, needle-valve body
Upper part is located in needle-valve stop collar, and the lower part of needle-valve body is located in nozzle, shape between needle-valve body top and needle-valve stop collar
Into control chamber, arrange raised on needle-valve stop collar, projection is located at control chamber, and needle-valve reset bullet is arranged between needle-valve body and projection
Spring, control chamber is communicated respectively with middle oil duct and lower shape fuel feed hole, and oil holding slot is formed between needle-valve body and nozzle, and nozzle-end sets
Put spray orifice；
The upper end connection transition oil pocket of descending high-pressure oil passage, Jing oil injector bodies, valve seat, intermediate mass, nozzle connection oil holding slot,
Up fuel feed hole and descending fuel feed hole are respectively communicated with descending high-pressure oil passage.
The present invention can also include：
1st, during spray orifice oil spout, the fuel pressure of transition oil pocket declines, and current limliting piston, ball valve, support slipper are overall to bottom
Move, and ball valve is not landed on ball valve return spring holder, metering hole is communicated with axial central through hole；When the fuel oil matter that spray orifice flows out
When amount exceedes threshold value, current limliting piston compresses ball valve and makes it be seated at ball valve return spring holder, metering hole and axial central through hole
Disconnect；When spray orifice stops oil spout, in the presence of ball valve back-moving spring, current limliting piston, ball valve and support slipper are integrally returned to
Initial position.
2nd, during coil electricity, balance valve rod is moved upwards, and balance valve rod epicoele is off-state with balance valve rod cavity of resorption, is returned
Oilhole is connected state with fuel tank, and the fuel oil for controlling intracavity passes through middle oil circuit and spill port oil return to fuel tank, and needle-valve body is upwards
Lift, spray orifice opens oil spout；After coil blackout, balance valve rod is moved downward in the effect of electromagnetic valve back-moving spring, in being crushed on
Between on block upper surface, balance valve rod epicoele connect with balance valve rod cavity of resorption, spill port and fuel tank disconnection, while descending high-pressure oil passage
In the up fuel feed hole of fuel oil one side Jing, balance valve rod epicoele, balance valve rod cavity of resorption, middle oil duct enter control chamber, it is another
The descending fuel feed holes of aspect Jing enter control chamber.
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 invention is that：Pressure accumulation cavity configuration is present invention employs, under conditions of big distributive value, it is ensured that fuel injector
Persistently being taken place without for injection process common rail fuel pressure is caused larger fluctuation and cause other fuel injector injection processes to be received
To impact.The present invention adopts current limliting valve module, effectively reduces the generation of abnormal injection situation, it is ensured that the oil spout of normal table
Process.Meanwhile, resonance structure is added in current limliting valve module, fuel pressure fluctuation is reduced, improve the stability of injection process.
Fuel injector balances valve rod to adjust the switch of oil return circuit using solenoid valve control, improves control accuracy and flexibility ratio, effectively
Improve the discharge of whole diesel engine, and improve the economy of fuel oil.The balance valve rod of fuel injector is using two-bit triplet
Form, is capable of achieving the two-way sealing of the conical surface, plane, reduces dynamic recirculating oil quantity.The two-way oil-feed oil of processing in valve seat and intermediate mass
Road and balanced valve control valve rod can cause control chamber more rapidly to build pressure, improve needle-valve response characteristic.And in the part of nozzle 7
Portion is poor without static pressure, it is ensured that fuel injector can realize static leak free function.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is current limliting valve module schematic diagram；
Fig. 3 is electromagnetic valve component schematic diagram；
Fig. 4 is A-A schematic diagrams.
Specific embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail：
With reference to Fig. 1-4, two-way oil-feed resonant mode electric-controlled fuel injector primary structure of the present invention includes injector head 1, fuel injector
Body 14, current limliting valve module 3, electromagnetic valve component 13, tight cap 5, needle-valve stop collar 11, nozzle 7, needle-valve body 8.Injector head 1 is with spray
Oily body 14 is connected by screw thread, and is sealed with the sealing ring 15 being placed on oil injector body 14.Fuel injector
Main fuel feed hole 16 on 1 is connected with the pressure accumulation chamber 2 in oil injector body 14.The lower section of oil injector body 14 is electromagnetic valve component 13, spray
Mouth 7 and needle-valve body 8, three passes through the assembly connection of tight cap 5.Current limliting valve module 3 is placed on inside oil injector body 14, and its structure is main
Including back-up ring 17, limit spring seat 30, damping spring 18, current limliting piston 19, ball valve 28, support slipper 21, ball valve back-moving spring
22nd, ball valve return spring holder 26.Metering hole 20 and piston blind hole 29 are machined on current limliting piston 19, support slipper 21 is machined with
Axial central through hole 27, it is ensured that fuel oil can lead to lower section oil circuit.The bottom of ball valve return spring holder 22 is machined with two resonance holes, point
Wei not resonance throttle orifice 25 and resonant through holes 23.Total length of the holes in axial direction is identical.The bottom of oil injector body 14 and spray
Electromagnetic valve component 13 is provided between the top of mouth 7, primary structure includes electromagnetic valve back-moving spring 31, electromagnetic valve return spring holder
42nd, coil 32, electric magnet 41, armature 40, valve seat 33, intermediate mass 38, balance valve rod 39.Armature 40 and the balance combination of valve rod 39 are put
Put in valve seat 33, and the up fuel feed hole 34 of processing in valve seat 33.Spill port 35, descending fuel feed hole are machined with intermediate mass 38
36th, middle oil duct 37 etc., and form control chamber 6 with needle-valve stop collar 11 and needle-valve body 8.
Fig. 1 is the overall structure diagram of fuel injector of the present invention.Main fuel feed hole 16 is machined with injector head 1, by height
The high pressure fuel of pressuring oil pipe conveying is entered inside fuel injector by main fuel feed hole 16.Injector head 1 passes through spiral shell with oil injector body 14
Streakline is assembled, and has sealing ring 15 to be sealed between the two.Main fuel feed hole 16 is connected with pressure accumulation chamber 2.In pressure accumulation chamber 2
Fuel oil can be down through current limliting valve module 3.Fuel oil enters control from after the outflow of current limliting valve module 3 by descending high-pressure oil passage 4
Chamber 6 and oil holding slot 10.Electromagnetic valve component 13 is equipped between the bottom of oil injector body 14 and nozzle 7.Utilize in electromagnetic valve component 13
Electromagnetic force controls armature 40 and balances lifting and taking a seat for valve rod 39.When being lifted up of valve rod 39 of balance, spill port 35 is opened
Open, the fuel oil of control chamber 6 flows through middle oil duct 37, by the venting of spill port 35.The fuel pressure of control chamber 6 declines, same to oil holding slot
10 form fuel oil pressure reduction so that needle-valve body 8 is lifted, fuel injection beginning.The displacement of needle-valve body 8 is wherein limited by needle-valve stop collar 11.
When balance valve rod 39 is taken a seat downwards, spill port 35 is closed, and fuel oil both can flow through the balance He of valve rod 39 by up fuel feed hole 34
Middle oil duct 37 enters control chamber 6, also can be directly entered control chamber 6 by descending fuel feed hole 36.It is placed with by pin in nozzle 7
The needle-valve body 8 that valve back-moving spring 12 is compressed.If Fig. 4 is the section A-A enlarged drawing of needle-valve body 8.The arcwall face of needle-valve body 8 can be very
Good plays guide effect.It is poor without static pressure inside nozzle 7, it is ensured that the characteristic without static leakage of fuel injector.Nozzle 7 and electricity
Electromagnetic valve component 13 is both placed in tight cap 5, then is fastened by threaded line and oil injector body 14.
Fig. 2 is flow-limiting valve components structural representation of the present invention.Current limliting valve module 3 mainly includes back-up ring 17, spacing bullet
Spring abutment 30, damping spring 18, current limliting piston 19, ball valve 28, support slipper 21, ball valve back-moving spring 22, ball valve return spring holder
26 etc..Whole current limliting valve module 3 is placed in inside oil injector body 14 by pressure accumulation chamber 2, and it is carried out by back-up ring 17 spacing.Limit
Position spring base 30 and back-up ring 17 coordinate, on the one hand as the spring base of damping spring 18, on the other hand to current limliting piston 19 most
Big displacement plays restriction effect.The initial tension of spring of spring dampened 18 and ball valve back-moving spring 22, ball valve 28 is with current limliting piston
19 lower surface and the upper surface of support slipper 21 coordinate.Ball valve return spring holder 26 receives the spring force of ball valve back-moving spring 22,
Bottom is pressed in, is the face of taking a seat of ball valve 28 at its top variable cross-section.The work that fuel oil is entered in current limliting piston 19 by pressure accumulation chamber 2
Plug blind hole 29, then the axial central through hole 27 of support slipper 21 is entered by metering hole 20.Flowed out by axial central through hole 27
Fuel oil enters transition oil pocket 24 through resonant through holes 23 and resonance throttle orifice 25.Processing resonant through holes 23 and resonance throttle orifice are set
25 cause the amplitude of the fuel pressure wave by holes to reduce.Due to having a sector hole footpath in resonance throttle orifice 25 compared with resonant through holes 23
Less, its restriction effect is stronger, causes the fuel flow rate difference flow through from holes so that the synchronous fuel pressure wave of script
Phase contrast is produced, is cancelled out each other after two bursts of fuel pressure wave superpositions, pressure oscillation further reduces.Descending high-pressure oil passage 4 and mistake
Cross oil pocket 24 to be connected and towards lower section oil circuit.When the normal oil spout of fuel injector, spray orifice 9 sprays fuel oil, in transition oil pocket 24
Fuel pressure declines.Due to throttling action of the metering hole 20 to fuel oil, in the piston blind hole 29 and pressure accumulation chamber 2 in current limliting piston 19
Fuel pressure it is larger, with transition oil pocket 24 formed pressure reduction so that current limliting piston 19, ball valve 28 and support slipper 21 are to bottom
Move, the fuel oil of fuel injector injection is compensated, but ball valve 28 will not be caused to be landed on ball valve return spring holder 26.Oil spout is tied
Shu Shi, as fuel oil flows through metering hole 20, current limliting piston about 19 pressure reduction be gradually reduced, in the effect of ball valve return spring force
Under, current limliting piston 19, ball valve 28 and support slipper 21 return back to original position.When the continual injection fuel oil of spray orifice 9, the combustion of outflow
Oil quality exceedes threshold value, and when abnormal operation occurs in fuel injector, because the flow of the fuel oil of the injection of spray orifice 9 is big, flow velocity is fast, makes
The oil pressure for obtaining the lower section transition oil pocket 24 of current limliting piston 19 declines rapidly, forms upper and lower pressure reduction, causes current limliting piston 19 to compress ball
Valve 28 is landed on ball valve return spring holder 26, prevents fuel flow communication.Due to lacking fuel delivery, fuel injector quits work, and hinders
Persistently carrying out for abnormal injection is stopped.
Fig. 3 is electromagnetic valve component part-structure schematic diagram of the present invention.Electromagnetic valve component 13 mainly includes electromagnetic valve reset bullet
Spring abutment 42, electromagnetic valve back-moving spring 31, coil 32, electric magnet 41, armature 40, balance valve rod 39, valve seat 33, intermediate mass 38.Electricity
Magnet valve return spring holder 42, electromagnetic valve back-moving spring 31, coil 32 and electric magnet 41 are built in inside oil injector body 14, wherein electricity
Magnet valve return spring holder 42 is by screw threads for fastening in electromagnetic valve top.It is electricity between electromagnetic valve return spring holder 42 and armature 40
Magnet valve back-moving spring 31.Armature 40 and balance valve rod 39 are placed on inside the valve seat 33 in the lower section of oil injector body 14.In lower section
The part combined with valve seat 33 is intermediate mass 38.Whole electromagnetic valve uses the form of two-position three-way valve.When fuel injector starts
During oil spout, the coil 32 of electromagnetic valve is powered, and with electric magnet 41 and armature 40 magnetic loop is formed, and produces electromagnetic force, attracts balanced valve
Bar 39 is moved upwards, opens the spill port 35 in intermediate mass 38, and blocks up fuel feed hole 34.At this moment, the combustion in control chamber 6
By middle oil duct 37 and the oil return of spill port 35 to fuel tank, oil pressure declines oil in control chamber 6, the pressurized reduction of the upper surface of needle-valve body 8,
Pressure reduction is formed with the fuel pressure of oil holding slot 10.Needle-valve body 8 is lifted up, and opens the oil spout of spray orifice 9.When fuel injector stops oil spout
When, because armature 40 and balance valve rod 39 are closely as one, thus they are jointly subjected to the bullet of electromagnetic valve back-moving spring 31
Spring pretightning force and be pressed on intermediate mass 38, and blocked spill port 35.At the same time, balance valve rod 39 to open by up
Fuel feed hole 34 and middle oil duct 37 lead to the oil circuit of control chamber 6, and the descending fuel feed hole 36 inside intermediate mass 38 enters simultaneously
Oil, improves normal voltage built-up rate of the single fuel feed hole to control chamber 6, accelerates the seating velocity of needle-valve, optimizes needle-valve response
Speed.
From the above-mentioned course of work, in the injection process of two-way oil-feed resonant mode electric-controlled fuel injector of the present invention, employ
The form of two-position three-way valve, by being balanced the two-way oil-feed inside valve rod 39 and intermediate mass 38 by electromagnetic valve, accelerates control chamber 6
Build and press through journey, improve the response speed that needle-valve is taken a seat.The use of resonance structure effectively reduces fuel pressure fluctuation, improves
The stability of injection process.Whole injection process adopts solenoid valve control, using motion of the electromagnetic force with acting balancing valve bar 39,
Realize to injection process fast response time, the high requirement of control accuracy.The built-in current limliting valve module 3 of oil injector body 14, prevents
Abnormal injection state is persistently carried out, it is ensured that the stability of the course of work.When the present invention is applied on common rail system, in big oil mass
Under spray regime, using pressure accumulation chamber 2 can effectively reduce common rail pressure fluctuation, so as to reduce each cylinder injection process uniformity and
Stability declines the generation of phenomenon.
Claims (5)
1. two-way oil-feed resonant mode electric-controlled fuel injector, is characterized in that：Including injector head, oil injector body, current limliting valve module, electromagnetism
Valve module, needle valve assembly, descending high-pressure oil passage, injector head is arranged on oil injector body top, and injector head inside arranges master and enters
Oilhole, oil injector body inside arranges pressure accumulation chamber, and main fuel feed hole is communicated with pressure accumulation chamber, and current limliting valve module is arranged in pressure accumulation chamber, spray
Electromagnetic valve component, needle valve assembly are installed successively in oily body lower end, and tight cap is located at outside electromagnetic valve component, needle valve assembly, tight cap
The mode that upper end is threaded connection is connected with oil injector body bottom；
The current limliting valve module include limit spring seat, current limliting piston, ball valve return spring holder, support slipper, limit spring seat,
Current limliting piston, ball valve return spring holder arrange from top to bottom, and damping spring is installed between limit spring seat and current limliting piston, supports
Slide block is arranged in ball valve return spring holder, ball valve is arranged between the upper end of support slipper and current limliting piston, under support slipper
Mounting ball valve back-moving spring between end and ball valve return spring holder below, arranges piston blind hole and current limliting in current limliting piston
Hole, arranges axial central through hole in support slipper, resonant through holes and resonance throttle orifice are arranged in ball valve return spring holder, and ball valve is multiple
Transition oil pocket, piston blind hole connection pressure accumulation chamber and metering hole, metering hole are set between position spring base and oil injector body below
Connect or disconnect under the control of ball valve with axial central through hole, resonant through holes connect axial central through hole with resonance throttle orifice
With transition oil pocket；
The electromagnetic valve component include electric magnet, coil, armature, balance valve rod, valve seat, intermediate mass, wound around coil on electric magnet,
Electric magnet top arranges electromagnetic valve return spring holder, and electric magnet lower section arranges armature, between armature and electromagnetic valve return spring holder
Electromagnetic 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, balances and formed between the middle part of valve rod and valve seat balance valve rod epicoele, balances bottom, valve seat and the centre of valve rod
Balance valve rod cavity of resorption is formed between block, up fuel feed hole is set in valve seat, spill port, middle oil duct, descending is set in intermediate mass
Fuel feed hole, up oilhole connection balance valve rod epicoele, middle oil duct connection balance valve rod cavity of resorption, control of the spill port in balance valve rod
System is lower to be connected or disconnects with middle oil duct and fuel tank；
The needle valve assembly includes needle-valve stop collar, nozzle, needle-valve body, and needle-valve stop collar is located in nozzle, the top of needle-valve body
Divide and be located in needle-valve stop collar, the lower part of needle-valve body is located in nozzle, is formed between needle-valve body top and needle-valve stop collar and is controlled
Chamber processed, arranges raised on needle-valve stop collar, projection is located at control chamber, and needle-valve back-moving spring is arranged between needle-valve body and projection,
Control chamber is communicated respectively with middle oil duct and lower shape fuel feed hole, and oil holding slot is formed between needle-valve body and nozzle, and nozzle-end is arranged
Spray orifice；
The upper end connection transition oil pocket of descending high-pressure oil passage, Jing oil injector bodies, valve seat, intermediate mass, nozzle connection oil holding slot are up
Fuel feed hole and descending fuel feed hole are respectively communicated with descending high-pressure oil passage.
2. two-way oil-feed resonant mode electric-controlled fuel injector according to claim 1, is characterized in that：During spray orifice oil spout, bridging oil
The fuel pressure in chamber declines, and current limliting piston, ball valve, support slipper 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 slipper integrally return to initial position.
3. two-way oil-feed resonant mode electric-controlled fuel injector according to claim 1 and 2, is characterized in that：During coil electricity, balance
Valve rod is moved upwards, and balance valve rod epicoele and balance valve rod cavity of resorption are off-state, and spill port is connected state with fuel tank, is controlled
By middle oil circuit and spill port oil return to fuel tank, needle-valve body is lifted up the fuel oil of intracavity, and spray orifice opens oil spout；Coil blackout
Afterwards, balance valve rod move downward in the effect of electromagnetic valve back-moving spring, be crushed on intermediate mass upper surface, balance valve rod epicoele with
Balance valve rod cavity of resorption connection, spill port disconnects with fuel tank, while the up fuel feed hole of fuel oil one side Jing in descending high-pressure oil passage,
Balance valve rod epicoele, balance valve rod cavity of resorption, middle oil duct enter control chamber, and the descending fuel feed hole of another aspect Jing enters control chamber.
4. two-way oil-feed resonant mode electric-controlled fuel injector according to claim 1 and 2, is characterized in that：Resonance throttle orifice middle part
Diameter less than its two ends diameter, and less than the diameter of resonant through holes, the total length of resonance throttle orifice and resonant through holes axial direction
Unanimously.
5. two-way oil-feed resonant mode electric-controlled fuel injector according to claim 3, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710034623.4A CN106593726A (en) | 2017-01-18 | 2017-01-18 | Resonant electrically controlled oil injector with oil fed through double paths |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710034623.4A CN106593726A (en) | 2017-01-18 | 2017-01-18 | Resonant electrically controlled oil injector with oil fed through double paths |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106593726A true CN106593726A (en) | 2017-04-26 |
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ID=58584758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710034623.4A Pending CN106593726A (en) | 2017-01-18 | 2017-01-18 | Resonant electrically controlled oil injector with oil fed through double paths |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091354A (en) * | 2017-06-28 | 2017-08-25 | 哈尔滨工程大学 | Fuel gas injection valve is oriented in a kind of piezoelectric type of through type axial admission |
| CN107120459A (en) * | 2017-06-28 | 2017-09-01 | 哈尔滨工程大学 | Fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type axial admission |
| CN114151242A (en) * | 2021-11-19 | 2022-03-08 | 哈尔滨工程大学 | Double-valve cooperative control ammonia fuel injector |
| CN114151250A (en) * | 2021-11-19 | 2022-03-08 | 哈尔滨工程大学 | Diesel oil pressurization-liquid ammonia direct injection dual-fuel injector |
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| CN206617265U (en) * | 2017-01-18 | 2017-11-07 | 哈尔滨工程大学 | Two-way oil-feed resonant mode electric-controlled fuel injector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107091354A (en) * | 2017-06-28 | 2017-08-25 | 哈尔滨工程大学 | Fuel gas injection valve is oriented in a kind of piezoelectric type of through type axial admission |
| CN107120459A (en) * | 2017-06-28 | 2017-09-01 | 哈尔滨工程大学 | Fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type axial admission |
| CN114151242A (en) * | 2021-11-19 | 2022-03-08 | 哈尔滨工程大学 | Double-valve cooperative control ammonia fuel injector |
| CN114151250A (en) * | 2021-11-19 | 2022-03-08 | 哈尔滨工程大学 | Diesel oil pressurization-liquid ammonia direct injection dual-fuel injector |
| CN114151250B (en) * | 2021-11-19 | 2023-07-21 | 哈尔滨工程大学 | Diesel supercharging-liquid ammonia direct-injection dual-fuel injector |
| CN114151242B (en) * | 2021-11-19 | 2023-07-21 | 哈尔滨工程大学 | Dual valve co-controlled ammonia fuel injector |
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