CN106762292A - A kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch - Google Patents
A kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch Download PDFInfo
- Publication number
- CN106762292A CN106762292A CN201710034573.XA CN201710034573A CN106762292A CN 106762292 A CN106762292 A CN 106762292A CN 201710034573 A CN201710034573 A CN 201710034573A CN 106762292 A CN106762292 A CN 106762292A
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- Prior art keywords
- oil
- valve
- needle
- fuel
- long
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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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
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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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1853—Orifice plates
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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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
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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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
Abstract
It is an object of the invention to provide a kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch, including electromagnetic valve component, oil injector body, needle-valve limited block, needle seating, needle-valve long, stop collar, control panel back-moving spring, control panel, intermediate mass, solenoid valve seat, nozzle.The present invention is designed with control panel in control chamber, the annular oil-feed metering-orifice that control chamber draining beforehand control plate is closed on intermediate mass, the dynamic quantity of fuel leakage produced during electric-controlled fuel injector real work can be effectively reduced, so as to reduce fuel oil loss, the injection pressure effectively improved in common rail pipe；Structure design on control panel causes that needle-valve long is slowly opened in fuel oil delay period, and rationally control sprays into the amount of fuel of cylinder in delay period, it is to avoid maximum combustion temperature is too high in cylinder, so as to reduce the DS NOx Est and fuel consumption of diesel engine.Minute hand valve surface sets the ditch of micron level depth, can effectively improve the stability of hole flow, reduces fuel injector cavitation pitting degree.
Description
Technical field
The present invention relates to a kind of electromagnetic control oil sprayer, specifically high-pressure common rail electromagnetic control oil sprayer.
Background technology
High pressure co-rail system is produced and course of injection as the AS of diesel engine fuel jetting because it will spray pressure
Separate, accurately Flexible Control distributive value and injection timing.Make diesel engine that there is good economy and emission performance, at present
Diesel engine arts are widely used in, technology gradually tends to ripe.Electric-controlled fuel injector in high pressure co-rail system part is in reality
In the course of work of border, have the shortcomings that high pressure fuel dynamic leakage, i.e. partial high pressure fuel oil can be via low pressure after entering fuel injector
Oil duct directly returns to low-voltage fuel case, causes waste, the decline of common rail pipe fuel pressure, the relative increasing of power consumption of high pressure fuel
Plus.In addition, the fuel injection characteristic of electric-controlled fuel injector has very significant impact to diesel engine performance, the phase before combustion is rationally controlled
Spray into the amount of fuel of cylinder, it is to avoid maximum combustion temperature is too high in cylinder, and needle-valve need to slowly be opened in delay period, so that effectively
Reduce diesel engine NOXDischarge and fuel consumption.As what fuel injector worked gradually increases, flow velocity is accelerated, hole in fuel injector
Substantially strengthen with cavitation pitting degree, fuel injector reliability decrease.
The content of the invention
It is an object of the invention to provide fuel oil dynamic leakage amount it is small, distributive value can be avoided in delay period excessive and reduce
A kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch of cavitation pitting.
The object of the present invention is achieved like this：
A kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch of the present invention, it is characterized in that：Including oil injector body, electromagnetism
Valve module, solenoid valve seat, intermediate mass, control panel, stop collar, needle-valve long, needle-valve limited block, needle seating, nozzle, solenoid valve block
Part, solenoid valve seat, intermediate mass, stop collar are arranged in oil injector body from top to bottom, and needle-valve stop collar, needle seating are successively set on
Oil injector body lower section, sets main oil gallery, the first oil transportation road, back oil road in oil injector body, the first oil transportation road is communicated with main oil gallery；
The electromagnetic valve component includes electromagnetic valve body, control valve rod, and solenoid valve seat is arranged on electromagnetic valve body lower section, magnetic valve
Armature chamber is formed between seat and electromagnetic valve body, armature is set in armature chamber, iron core is set in electromagnetic valve body, line is wound in iron core
Circle, control valve rod is connected with armature, controls the upper end of valve rod to be located in iron core, controls the lower end of valve rod to be located in solenoid valve seat,
Control to set valve rod back-moving spring between the top of valve rod and the iron core above it, between the middle part of control valve rod and solenoid valve seat
Form control valve rod epicoele；
Set in intermediate mass below solenoid valve seat and be respectively provided with low pressure oil duct, middle oil duct, the second oil transportation road, balanced valve
Connection oil duct, low pressure oil duct connection low-voltage fuel case, middle oil duct are formed between the lower end of bar and solenoid valve seat and intermediate mass
Connection connection oil duct, the second oil transportation road connection main oil gallery；
Control panel is installed in stop collar, fuel-displaced metering-orifice, shape between control panel and the stop collar on the outside of it are set in control panel
Side oil channel is circularized, annular oil-feed metering-orifice and interstitial hole is formed between intermediate mass lower surface and control panel respectively, needle-valve long
Upper end is located in stop collar, and control panel back-moving spring is installed between the top of needle-valve long and control panel, and the lower end of needle-valve long passes through
Needle-valve limited block is simultaneously stretched into needle seating, and control chamber is formed between control panel, stop collar and needle-valve long, and annular oil-feed metering-orifice connects
Logical second oil transportation road, interstitial hole is respectively communicated with middle oil duct and fuel-displaced metering-orifice, and control chamber is respectively communicated with fuel-displaced metering-orifice and annular side
Face oil duct, is respectively provided with that top is raised and lower section is raised on needle-valve long, set spacing preiection on stop collar, top it is raised with it is spacing
Needle-valve back-moving spring long is installed, lower section is raised to coordinate limitation needle stroke long with needle-valve limited block between projection, top it is raised with
Low pressure oil pocket, the connection oil return of low pressure oil pocket are formed between needle-valve portion long and its outside oil injector body between the projection of lower section
Road；
The nozzle includes spray orifice and ditch, and spray orifice is machined on needle seating, and ditch is set and needle-valve bottom long surface
On；
Oil holding slot is set in needle seating, and needle-valve long coordinates the connection or disconnection of control spray orifice and oil holding slot with spray orifice, contains oil
Groove connects the first oil transportation road.
The present invention can also include：
1st, the ditch is particularly located between the sealing cone and needle-valve body bottom formed when needle-valve long is taken a seat, ditch
Number is the integral multiple of nozzle hole number, and the depth of ditch is micron order.
2nd, when coil is not powered on, control valve rod is crushed on intermediate mass, and control valve rod epicoele is communicated with oil duct is connected, low pressure
Oil duct and middle oil duct and be connected oil duct disconnection, needle-valve long blocks spray orifice；After coil electricity, control valve rod is transported upwards with armature
Dynamic, control valve rod epicoele is disconnected with oil duct is connected, and low pressure oil duct is communicated with oil duct, middle oil duct is connected, the fuel oil in control chamber
Through fuel-displaced metering-orifice, middle oil duct, connection oil duct, into low pressure oil duct, needle-valve long is lifted, spray orifice oil spout.
Advantage of the invention is that：The present invention is designed with control panel in control chamber, and control chamber draining beforehand control plate is closed
The annular oil-feed metering-orifice closed on intermediate mass, can effectively reduce the dynamic fuel leakage produced during electric-controlled fuel injector real work
Amount, so as to reduce fuel oil loss, the injection pressure effectively improved in common rail pipe；The design of fuel-displaced metering-orifice causes minute hand on control panel
Valve is slowly opened in fuel oil delay period, and rationally control sprays into the amount of fuel of cylinder in delay period, it is to avoid highest burning in cylinder
Temperature is too high, so as to reduce the DS NOx Est and fuel consumption of diesel engine；Present invention employs ditch structure, according to reality
The requirement of operating mode, matches diameter, depth and the number of ditch, and the stability for making it improve hole flow reduces fuel injector cavitation pitting
The best results of degree.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation of electromagnetic valve component；
Fig. 3 is the structural representation for controlling plate part and surrounding oil circuit；
Fig. 4 is nozzle segment structural representation of the present invention.
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, a kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch of the present invention, it is by solenoid valve block
Part 1, rugged housing 2, oil injector body 3, tight cap 6, needle-valve limited block 7, solenoid valve seat 9, intermediate mass 10, control panel 11, control panel
Back-moving spring 12, stop collar 13, needle-valve back-moving spring 15 long, needle-valve return spring holder 16 long, needle-valve long 17, needle seating 18 and spray
Mouth 8 is constituted.Electromagnetic valve component 1, solenoid valve seat 9, intermediate mass 10, control panel 11, control panel back-moving spring 12, stop collar 13 are from upper
And under be sequentially connected in oil injector body 3, electromagnetic valve component 1 is fixed on the top of oil injector body 3 by rugged housing 2, electricity
Electromagnetic valve component 1 includes：Binding post 20, electromagnetic valve body 21, coil 22, armature 23, locating snap ring 24, iron core 25, valve rod back-moving spring
26th, valve rod return spring holder 27, sealing ring 28 and control valve rod 29, external the end of a thread of coil 22 pass through binding post 20 and diesel engine electric
Control unit is connected, and electromagnetic valve body 21 is fixed by rugged housing 2, is connected by screw thread between rugged housing 2 and oil injector body 3
Connect, sealing ring 28 is disposed between electromagnetic valve body 21 and oil injector body 3, control valve rod 29 passes through locating snap ring 24 and the phase of armature 23
Even, control valve rod 29 is built in solenoid valve seat 9.Electromagnetic valve component 1 is located on solenoid valve seat 9, and the lower section of solenoid valve seat 9 is successively
Intermediate mass 10, control panel 11, control panel back-moving spring 12, stop collar 13 are disposed with, control panel back-moving spring 12 is connected to control
Between plate 11 and stop collar 13, the center of stop collar 13 is provided with through hole, and the upper end of needle-valve long 17 is arranged in inside through hole, control panel 11,
Inner space that stop collar 13, the three of needle-valve long 17 surround forms control chamber, be provided with control panel 11 in the middle of connection oil duct 31 with
The fuel-displaced metering-orifice 34 of control chamber, answers near needle-valve long is also equipped between the lower end of stop collar 13 part of needle-valve 17 long and stop collar 13
Position spring 15 and needle-valve return spring holder 16 long, the end portion of needle-valve long 17 is disposed with needle-valve limited block 7, on needle-valve limited block 7
Portion is provided with annular oil groove, and the lower end of needle-valve long 17 is arranged in the needle seating 18 of the lower section of needle-valve limited block 7, needle seating 18 and fuel injector
Body 3 is fixed together between lower section by tight cap 6.Spray orifice 36 is processed on needle seating 18, the surface of needle-valve long 17 sets micron level
The ditch 37 of depth.
Electromagnetic valve component 1, oil injector body 3, intermediate mass 10, control panel 11 and needle seating 18 constitute one kind of the present invention and carry
The main part of the board-like electric-controlled fuel injector of minute hand valve opening of ditch.Be disposed with oil injector body 3 main oil gallery 4, the first oil transportation road 5,
Back oil road 14, is disposed with the second oil transportation road 30, middle oil duct 31, low pressure oil duct 33 in the intermediate mass 10 of the top of control panel 11, main
Oil duct 4 is respectively communicated with the first oil transportation road 5, the second oil transportation road 30, and back oil road 14 will be low between needle-valve long 17 and oil injector body 3
Pumping cavity gets up with low-voltage fuel oil communication, and fuel oil is via main oil gallery 4, the first oil transportation road 5, needle-valve limited block 7 and needle seating
Oil circuit on 18 can be entered into oil holding slot 19, via the annular oil-feed above main oil gallery 4, the second oil transportation road 30, control panel 11
Metering-orifice 32, the annular side oil duct 35 then passed through around fuel-displaced metering-orifice 34 and control panel 11 in control panel 11 can enter into control
In chamber processed, middle oil duct 31 is connected by the fuel-displaced metering-orifice 34 on control panel 11 with control chamber, by controlling electromagnetic valve component 1
In control valve rod 29 lift to take a seat and control the break-make of low pressure oil duct 33 in middle oil duct 31 to intermediate mass 10, this process pair
In the sealing surface of oil circuit, control valve rod 29 is in the form of flat seal.
When diesel engine works, the main oil gallery 4 that common rail pipe inner high voltage fuel oil is entered into electric-controlled fuel injector is high with rear portion
Compression ignition oil enters into electronic control injection via the oil circuit on the annular oil groove and needle seating 18 on the first oil transportation road 5, needle-valve limited block 7
In the oil holding slot 19 of device, another part fuel oil is via the second oil transportation road 30, the annular oil-feed metering-orifice 32 of the top of control panel 11, then passes through
The annular side oil duct 35 around fuel-displaced metering-orifice 34 and control panel 11 crossed in control panel 11 enters into control panel 11, stop collar
13rd, in the control chamber that the three of needle-valve long 17 surrounds, the coil 22 during beginning in electromagnetic valve component 1 is not yet powered, and controls valve rod 29
The connection of low pressure oil duct 33 in middle oil duct 31 to intermediate mass 10 is blocked, now high pressure fuel is full of whole control chamber and centre
Oil duct 31, needle-valve long 17 is controlled chamber inner high voltage fuel oil and the down force of needle-valve back-moving spring 15 long is greater than needle-valve long
The 17 upward active forces for being subject to the inner high voltage fuel oil of 18 inside oil holding slot of needle seating 19, needle-valve long 17 is crushed on needle seating 18 and blocks
Spray orifice 36, the coil 22 in electromagnetic valve component 1 is connected by binding post 20 with diesel engine electric control unit, after coil 22 is powered,
Iron core 25, armature 23 are magnetized, and are formed via iron core 25, air gap, the closed loop magnetic loop of the three of armature 23, and armature 23 is subject to electromagnetism
Power simultaneously overcomes the active forces such as the pretightning force of valve rod back-moving spring 26, the resistance of motion to move upwards, and control valve rod 29 passes through locating snap ring
24 are fixed on armature 23, and follow armature 23 to move upwardly together, and control valve rod 29 is lifted so that middle oil duct 31 and centre
Low pressure oil duct 33 in block 10 is connected, and control chamber inner high voltage fuel oil is via the fuel-displaced metering-orifice 34, middle oil on control panel 11
Road 31 is entered into low pressure oil duct 33, and due to the presence of fuel-displaced metering-orifice 34 on control panel 11, control chamber internal fuel pressure declines
Speed is less than the fuel pressure decrease speed of middle oil duct 31, and fuel oil releases slowly through fuel-displaced metering-orifice 34, draining early stage
The hydraulic coupling that control panel 11 is controlled fuel oil in chamber is greater than the hydraulic coupling of the fuel oil of middle oil duct 31, and control panel 11 is still pushed up
Rise, annular oil-feed metering-orifice 32 is plugged, when control chamber fuel pressure declines to a certain extent, control panel 11 declines, now
Annular oil-feed metering-orifice 32 is just opened, and reduces the dynamic leakage amount of electric-controlled fuel injector whole work process intermediate fuel oil.In automatically controlled spray
In the oily device course of work, the low pressure oil between needle-valve long 17 and oil injector body 3 is leaked into due to the fit clearance between needle-valve coupling part
The fuel oil in chamber, is entered in low-voltage fuel oil circuit by back oil road 14, finally returns that low-voltage fuel case, the control in electromagnetic valve component 1
Valve rod processed 29 for lower section oil return line sealing surface, using flat seal form.When needle-valve long 17 is subject to the inner high voltage of oil holding slot 19
When fuel pressure is more than control chamber fuel pressure and 15 pretightning force of needle-valve back-moving spring long, needle-valve long 17 is lifted, and fuel injector is opened
Beginning oil spout, because fuel oil lentamente releases in control chamber, needle-valve long 17 is lentamente opened, it is to avoid the spray in cylinder is sprayed into delay period
Oil mass is excessive.When the coil 22 in electromagnetic valve component 1 is powered off, armature 23 drives control valve in the presence of valve rod back-moving spring 26
Bar 29 is taken a seat, and middle oil duct 31 is blocked by control valve rod 29 again with the connection of low pressure oil duct 33, and high pressure fuel is via main oil gallery
4th, the annular oil-feed metering-orifice 32 on the second oil transportation road 30, intermediate mass 10, then by the fuel-displaced metering-orifice 34 in control panel 11 and control
Annular side oil duct 35 around plate 11 enters into and high pressure is started against in control chamber, and needle-valve long 17 is controlled chamber inner high voltage
The upward effect for being subject to the inner high voltage fuel oil of oil holding slot 19 more than needle-valve long 17 with joint efforts downwards of fuel oil and needle-valve back-moving spring 15 long
After power, needle-valve long 17 is taken a seat rapidly, and fuel injector oil spout stops rapidly.
Fig. 4 is nozzle segment structural representation.It is made up of spray orifice 36 and ditch 37.It is close in the motion process of needle-valve long 17
The envelope conical surface is opened, and fuel oil flows to spray orifice 36 from oil holding slot 19 by sealing cone, ditch 37.Ditch 37 changes the flow direction of fuel oil
And velocity magnitude, and then the flow direction and velocity magnitude of spray orifice porch are have adjusted, and the valid circulation area of spray orifice 36 is increased, reduce
The nascent degree in hole, stabilizes the flowing of spray orifice 36 inner cavity, slow down the fluctuation of distributive value, reduces cavitation pitting journey in hole
Degree.
From the above-mentioned course of work：The design of control panel of the present invention 11 and its surrounding oil circuit promotes control panel 11 in work
All the time dynamic balance state is in during work, control chamber draining beforehand control plate 11 can block annular oil-feed metering-orifice 32, significantly
Fuel oil dynamic leakage amount when fuel injector works is reduced, fuel oil loss, the injection pressure effectively improved in common rail pipe is reduced；Together
Duration needle-valve 17 is lentamente opened in fuel injection beginning, reduces the amount of fuel sprayed into delay period in cylinder, it is to avoid make highest in cylinder
Ignition temperature is too high, so as to reduce the DS NOx Est and fuel consumption of diesel engine；The ditch 37 that the surface of needle-valve long 17 is set, has
Effect improves the stability of hole flow, reduces fuel injector cavitation pitting degree.
Claims (3)
1. a kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch, it is characterized in that：Including oil injector body, electromagnetic valve component,
Solenoid valve seat, intermediate mass, control panel, stop collar, needle-valve long, needle-valve limited block, needle seating, nozzle, electromagnetic valve component, magnetic valve
Seat, intermediate mass, stop collar are arranged in oil injector body from top to bottom, and needle-valve stop collar, needle seating are successively set on oil injector body
Lower section, sets main oil gallery, the first oil transportation road, back oil road in oil injector body, the first oil transportation road is communicated with main oil gallery；
The electromagnetic valve component include electromagnetic valve body, control valve rod, solenoid valve seat be arranged on electromagnetic valve body lower section, solenoid valve seat and
Armature chamber is formed between electromagnetic valve body, armature is set in armature chamber, iron core is set in electromagnetic valve body, wound around coil in iron core, control
Valve rod processed is connected with armature, controls the upper end of valve rod to be located in iron core, controls the lower end of valve rod to be located in solenoid valve seat, controls valve
Valve rod back-moving spring is set between the top of bar and the iron core above it, controls to form control between the middle part of valve rod and solenoid valve seat
Valve rod epicoele processed；
Set in intermediate mass below solenoid valve seat and be respectively provided with low pressure oil duct, middle oil duct, the second oil transportation road, balance valve rod
Connection oil duct, low pressure oil duct connection low-voltage fuel case, middle oil duct connection are formed between lower end and solenoid valve seat and intermediate mass
Connection oil duct, the second oil transportation road connection main oil gallery；
Control panel is installed in stop collar, fuel-displaced metering-orifice is set in control panel, ring is formed between control panel and the stop collar on the outside of it
Shape side oil channel, forms annular oil-feed metering-orifice and interstitial hole, the upper end of needle-valve long respectively between intermediate mass lower surface and control panel
In stop collar, control panel back-moving spring is installed between the top of needle-valve long and control panel, the lower end of needle-valve long passes through needle-valve
Limited block is simultaneously stretched into needle seating, forms control chamber between control panel, stop collar and needle-valve long, annular oil-feed metering-orifice connection the
Two oil transportation roads, interstitial hole is respectively communicated with middle oil duct and fuel-displaced metering-orifice, and control chamber is respectively communicated with fuel-displaced metering-orifice and annular side oil
Road, is respectively provided with top projection on needle-valve long and lower section is raised, and spacing preiection, top projection and spacing preiection are set on stop collar
Between needle-valve back-moving spring long is installed, lower section is raised to coordinate limitation needle stroke long with needle-valve limited block, and top is raised and lower section
Low pressure oil pocket, low pressure oil pocket connection back oil road are formed between needle-valve portion long and its outside oil injector body between projection；
The nozzle includes spray orifice and ditch, and spray orifice is machined on needle seating, ditch set with the surface of needle-valve bottom long；
Oil holding slot is set in needle seating, and needle-valve long coordinates the connection or disconnection of control spray orifice and oil holding slot with spray orifice, and oil holding slot connects
Logical first oil transportation road.
2. a kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch according to claim 1, it is characterized in that：The quarter
Ditch is particularly located between the sealing cone and needle-valve body bottom formed when needle-valve long is taken a seat, and the number of ditch is nozzle hole number
Integral multiple, the depth of ditch is micron order.
3. a kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch according to claim 1, it is characterized in that：Coil is not
During energization, control valve rod be crushed on intermediate mass, control valve rod epicoele communicated with oil duct be connected, low pressure oil duct and centre oil duct with
And connection oil duct disconnects, needle-valve long blocks spray orifice；After coil electricity, control valve rod is moved upwards with armature, controls valve rod epicoele
Disconnected with oil duct is connected, low pressure oil duct is communicated with oil duct, middle oil duct is connected, and the fuel oil in control chamber is through fuel-displaced metering-orifice, centre
Oil duct, connection oil duct, into low pressure oil duct, needle-valve long is lifted, spray orifice oil spout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710034573.XA CN106762292A (en) | 2017-01-18 | 2017-01-18 | A kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710034573.XA CN106762292A (en) | 2017-01-18 | 2017-01-18 | A kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106762292A true CN106762292A (en) | 2017-05-31 |
Family
ID=58946364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710034573.XA Pending CN106762292A (en) | 2017-01-18 | 2017-01-18 | A kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch |
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| CN (1) | CN106762292A (en) |
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| JP2011208554A (en) * | 2010-03-29 | 2011-10-20 | Denso Corp | Fuel injection device |
| CN103184960A (en) * | 2013-03-26 | 2013-07-03 | 哈尔滨工程大学 | Marine electromagnetically-controlled heavy oil injector |
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| CN206753784U (en) * | 2017-01-18 | 2017-12-15 | 哈尔滨工程大学 | A kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch |
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2017
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Application publication date: 20170531 |