CN106677941A - Dual-channel oil feeding long needle valve hole plate type electronic controlled fuel injector - Google Patents
Dual-channel oil feeding long needle valve hole plate type electronic controlled fuel injector Download PDFInfo
- Publication number
- CN106677941A CN106677941A CN201710034574.4A CN201710034574A CN106677941A CN 106677941 A CN106677941 A CN 106677941A CN 201710034574 A CN201710034574 A CN 201710034574A CN 106677941 A CN106677941 A CN 106677941A
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- Prior art keywords
- oil
- fuel
- valve
- long needle
- oil duct
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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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1886—Details of valve seats 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
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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
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
- F02M63/0035—Poppet valves, i.e. having a mushroom-shaped valve member that moves perpendicularly to the plane of the valve seat
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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
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
Abstract
The invention aims at providing a dual-channel fuel feeding long needle valve hole plate type electronic controlled fuel injector. A control panel is designed in a control cavity. An annular fuel feeding metering hole in a middle block is closed through the control panel in the early fuel drainage period of the control cavity, and the dynamic fuel leakage rate produced during practical working of the electronic controlled fuel injector can be effectively reduced, so that fuel loss is reduced, and the fuel injection pressure in a common rail pipe is effectively improved. Due to the existing of a fuel discharge metering hole in the control panel, the fuel pressure in the control cavity in the early fuel drainage period is slowly decreased, a long needle valve is slowly uplifted, the opening speed of the long needle valve is increased along with decreasing of pressure of the control cavity, a fuel feeding path is formed by a main oil channel, a third fuel conveying channel, a connection oil channel on the periphery of a control valve rod, a middle oil channel, the fuel drainage metering hole in the control panel and an annular side face oil channel on the periphery of the control panel, the pressure build-up speed of fuel in the control cavity is accelerated, the seated speed of the long needle valve is increased, the movement of the long needle valve in the whole working process meets the requirements for being slow and then fast, and it is ensured that the fuel injection law that the speed is low and then high is achieved through the electronic controlled fuel injector.
Description
Technical field
The present invention relates to a kind of engine fuel injector, specifically high pressure common rail injector.
Background technology
High pressure co-rail system as diesel engine fuel jetting AS, because its by injection pressure produce and course of injection
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.In the diesel engine real work for being furnished with high pressure co-rail system
During, be present high pressure fuel dynamic leakage in the electric-controlled fuel injector in high pressure co-rail system part, be in particular in：From
Common rail pipe understands some work for being not involved in electric-controlled fuel injector into the high pressure fuel of electric-controlled fuel injector, straight via low pressure oil duct
Connect and return in low-voltage fuel case, cause waste, the decline of common rail pipe fuel pressure, the relative increase of power consumption of high pressure fuel.
In addition, the quality of diesel engine performance largely depends on the injection characteristics of electric-controlled fuel injector, its spray anxious after first delaying
Fuel oil meter is restrained, and can effectively reduce diesel engine carbon black discharge and fuel consumption, and needle-valve need to slowly be opened in delay period, after catching fire
Rapid to open, to ensure sufficiently high injection rate, needle-valve needs quick closedown during end of injection, to ensure quick oil-break and prevent
Secondary injection.
The content of the invention
It is an object of the invention to provide fuel oil dynamic leakage amount is little, can realize first delaying after urgency fuel injection characteristic two-way
The board-like electric-controlled fuel injector of oil-feed minute hand valve opening.
The object of the present invention is achieved like this：
The board-like electric-controlled fuel injector of two-way oil-feed minute hand valve opening, is characterized in that：Including oil injector body, electromagnetic valve component, electromagnetism
Valve seat, intermediate mass, panel, stop collar, long needle-valve, needle-valve limited block, nozzle, electromagnetic valve component, solenoid valve seat, intermediate mass,
Stop collar, from top to bottom be arranged on oil injector body in, needle-valve stop collar, nozzle be successively set on oil injector body lower section, fuel injector
Main oil gallery, the first oil transportation road, back oil road are set in body, and 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, electromagnetic 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 and armature are connected, and the upper end of control valve rod is located at the lower end that valve rod is controlled in iron core in solenoid valve seat,
Valve rod back-moving spring is set between the top of control valve rod and the iron core above it, the 3rd oil transportation road, control are set in solenoid valve seat
Between the middle part of valve rod processed and solenoid valve seat formed control valve rod epicoele, the 3rd oil transportation road respectively with main oil gallery and control valve rod on
Chamber communicates；
Arrange 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；
Panel is installed in stop collar, fuel-displaced metering-orifice, shape between panel and the stop collar on the outside of it are set in panel
Side oil channel is circularized, annular oil-feed metering-orifice and interstitial hole is formed between intermediate mass lower surface and panel respectively, long needle-valve
Upper end is located in stop collar, and panel back-moving spring is installed between the top of long needle-valve and panel, and the lower end of long needle-valve passes through
Needle-valve limited block is simultaneously stretched in nozzle, and control chamber, annular oil-feed metering-orifice connection are formed between panel, stop collar and long needle-valve
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
Oil duct, is respectively provided with top projection on long needle-valve and lower section is raised, and spacing preiection, top projection and limit convex are arranged on stop collar
Long needle-valve back-moving spring is installed, lower section is raised to coordinate the long needle stroke of restriction with needle-valve limited block, and top projection is with between rising
Low pressure oil pocket, low pressure oil pocket connection back oil road are formed between long needle-valve portion and its outside oil injector body between side's projection；
Oil holding slot is set in nozzle, and the end of nozzle arranges spray orifice, and long needle-valve coordinates control spray orifice and oil holding slot with spray orifice
Connection or disconnection, oil holding slot connect the first oil transportation road.
The present invention can also include：
1st, 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, long needle-valve blocks spray orifice；After coil electricity, control valve rod is transported upwards with armature
Dynamic, control valve rod epicoele disconnects with oil duct is connected, and low pressure oil duct is communicated with oil duct, middle oil duct is connected, and controls the fuel oil of intracavity
The fuel-displaced metering-orifices of Jing, middle oil duct, connection oil duct, into low pressure oil duct, long needle-valve is lifted, spray orifice oil spout.
Advantage of the invention is that：The present invention is designed with 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 presence of fuel-displaced metering-orifice on panel causes draining
Beforehand control intracavity fuel pressure declines slowly, causes long needle-valve to lift slowly, and with control chamber pressure drop, long needle-valve is opened
Speed is accelerated, additionally, fuel-displaced on the connection oil duct, middle oil duct, panel around main oil gallery, the 3rd oil transportation road, control valve rod
Annular side oil duct to control chamber around metering-orifice and panel defines extra oil-feed oil circuit, accelerates fuel oil in control chamber
Voltage built-up rate, improve long needle-valve seating velocity, the motion of the long needle-valve of whole work process meet first delay after anxious requirement, protect
Fuel injection characteristic anxious after electric-controlled fuel injector is realized first delaying has been demonstrate,proved, the soot emissions and fuel consumption of diesel engine have been reduced.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is electromagnetic valve component schematic diagram；
Fig. 3 is the structural representation for controlling plate part and surrounding oil circuit.
Specific embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail：
With reference to Fig. 1-3, a kind of board-like electric-controlled fuel injector of two-way oil-feed minute hand valve opening of the invention, it is by electromagnetic valve component 1, tight
Gu housing 2, oil injector body 3, tight cap 6, needle-valve limited block 7, solenoid valve seat 9, intermediate mass 10, panel 11, control sheet reset bullet
Spring 12, stop collar 13, long needle-valve back-moving spring 15, long needle-valve return spring holder 16, long needle-valve 17 and nozzle 18 are constituted.Electromagnetic valve
Component 1, solenoid valve seat 9, intermediate mass 10, panel 11, panel back-moving spring 12, stop collar 13 are sequentially connected from top to bottom peace
In being mounted in oil injector body 3, electromagnetic valve component 1 is fixed on the top of oil injector body 3 using rugged housing 2, and 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 26, valve rod back-moving spring
Seat 27, sealing ring 28 and control valve rod 29, are disposed with connection oil duct 34 around control valve rod 29, the external the end of a thread of coil 22 is by connecing
Terminal 20 is connected with diesel engine electric control unit, and electromagnetic valve body 21 is fixed by rugged housing 2, rugged housing 2 and fuel injector
It is threaded connection between body 3, sealing ring 28 is installed between electromagnetic valve body 21 and oil injector body 3, control valve rod 29 is utilized and stopped
Rotating ring 24 is connected with armature 23, and control valve rod 29 is built in solenoid valve seat 9.Electromagnetic valve component 1 be arranged in solenoid valve seat 9 it
On, the lower section of solenoid valve seat 9 is sequentially arranged with intermediate mass 10, panel 11, panel back-moving spring 12, stop collar 13, and panel is multiple
Position spring 12 is arranged between panel 11 and stop collar 13, and the center of stop collar 13 is provided with through hole, and the upper end of long needle-valve 17 is arranged in
Inside through hole, the inner space that panel 11, stop collar 13, the three of long needle-valve 17 surround forms control chamber, opens on panel 11
Have the fuel-displaced metering-orifice 33 of oil duct 36 and control chamber in the middle of connection, near the long part of needle-valve 17 in the lower end of stop collar 13 and stop collar 13 it
Between be also equipped with long needle-valve back-moving spring 15 and long needle-valve return spring holder 16, it is spacing that the end portion of long needle-valve 17 is disposed with needle-valve
Block 7, the top of needle-valve limited block 7 is provided with annular oil groove, and the lower end of long needle-valve 17 is arranged in the nozzle 18 of the lower section of needle-valve limited block 7,
It is fixed together by tight cap 6 between nozzle 18 and the lower section of oil injector body 3.
Electromagnetic valve component 1, oil injector body 3, solenoid valve seat 9, intermediate mass 10, panel 11 and nozzle 18 constitute the present invention
The main part of the board-like electric-controlled fuel injector of two-way oil-feed minute hand valve opening.Main oil gallery 4, the first oil transportation road are disposed with oil injector body 3
5th, back oil road 14, the 3rd oil transportation road 30, are disposed with the second oil transportation road 31, middle oil duct in the intermediate mass 10 of the top of panel 11
36th, it is disposed with around control valve rod 29 in low pressure oil duct 35, solenoid valve seat 9 and connects oil duct 34, the oil transportation road 5 of main oil gallery 4 and first,
Second oil transportation road 31, the 3rd oil transportation road 30 are respectively communicated with, and back oil road 14 is by the low pressure oil pocket between long needle-valve 17 and oil injector body 3
Get up with low-voltage fuel oil communication, fuel oil is via the oil on main oil gallery 4, the first oil transportation road 5, needle-valve limited block 7 and nozzle 18
Road can be entered in oil holding slot 18, via main oil gallery 4, the second oil transportation road 31, the top of panel 11 annular oil-feed metering-orifice 32, with
Annular side oil duct 37 rear around the fuel-displaced metering-orifice 33 and panel 11 in panel 11 or via the 3rd oil transportation road
30th, the surrounding of valve rod 29 connection oil duct 34, middle oil duct 36 are controlled, fuel-displaced metering-orifice 33 and the panel in panel 11 is then passed through
Annular side oil duct 37 around 11 can enter into control intracavity, and middle oil duct 36 is by the fuel-displaced metering-orifice 33 on panel 11
Be connected with control chamber, by control electromagnetic valve component 1 in control valve rod 29 lift take a seat control middle oil duct 36 to
The break-make of low pressure oil duct 35 in intermediate mass 10.
When diesel engine works, the main oil gallery 4 that common rail pipe inner high voltage fuel oil is entered in electric-controlled fuel injector, a part of fuel oil Jing
The oil circuit crossed on the first oil transportation road 5, needle-valve limited block 7 and nozzle 18 is entered in the oil holding slot 19 of electric-controlled fuel injector, a part
Fuel oil then passes through the fuel-displaced metering-orifice of panel 11 through the second oil transportation road 31, the annular oil-feed metering-orifice 32 of the top of panel 11
33 and panel 11 around annular side oil duct 37 enter into panel 11, the control that stop collar 13, the three of long needle-valve 17 surround
Intracavity processed, connection oil duct 34, middle oil duct 36 of some fuel oil around the 3rd oil transportation road 30, control valve rod 29,
Then pass through the annular side oil duct 37 around the fuel-displaced metering-orifice 33 and panel 11 of panel 11 and likewise enter control intracavity.
When coil 22 in electromagnetic valve component 1 is not yet powered, control valve rod 29 has blocked middle oil duct 36 to low pressure in intermediate mass 10
The connection of oil duct 35, now high pressure fuel is full of whole control chamber and each big oil duct in addition to low pressure oil duct 35, long needle-valve 17
The down force for being controlled intracavity high pressure fuel and long needle-valve back-moving spring 15 is greater than long needle-valve 17 by nozzle 18
The active force upwards of the inner high voltage fuel oil of oil holding slot 19, long needle-valve 17 is crushed on nozzle 18 blocks spray orifice 8, using electromagnetic valve component
Binding post 20 in 1, diesel engine electric control unit starts to be powered to coil 22, and iron core 25, armature 23 are gradually magnetized, formed via
Iron core 25, air gap, the closed loop magnetic loop of the three of armature 23, electromagnetic force suffered by armature 23 constantly increases, and finally overcomes valve rod to reset
The active forces such as pretightning force, the resistance of motion of spring 26 are moved upwards, and control valve rod 29 is fixed on armature 23 using locating snap ring 24,
And follow armature 23 to move upwardly together, control lifting for valve rod 29 cause centre oil duct 36 to be able to connect with low pressure oil duct 35,
And the 3rd oil transportation road 30, the control surrounding oil duct 34 of valve rod 29 to the oil circuit of middle oil duct 36 are blocked, the high compression ignition of intracavity is controlled
Connection oil duct 34 of the oil around the fuel-displaced metering-orifice 33 of panel 11, middle oil duct 36, control valve rod 29 enters into low pressure oil
Road 35 is finally returned that in low-voltage fuel case, due to the effect of the fuel-displaced metering-orifice 33 of panel 11, under control chamber internal fuel pressure
Reduction of speed degree is less than the fuel pressure decrease speed of middle oil duct 36, and fuel oil releases slowly through fuel-displaced metering-orifice 33, before draining
Phase panel 11 is controlled the hydraulic coupling that the hydraulic coupling of intracavity fuel oil is greater than the fuel oil of middle oil duct 36, panel 11 still by
Jack-up, now annular oil-feed metering-orifice 32 be plugged, when control chamber fuel pressure declines to a certain extent, under panel 11
Drop, 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 the electric-controlled fuel injector course of work, because the fit clearance between needle-valve coupling part is leaked between long needle-valve 17 and oil injector body 3
The fuel oil of low pressure oil pocket, is entered in low-voltage fuel oil circuit by back oil road 14, finally returns that low-voltage fuel case, electromagnetic valve component 1
In control valve rod 29 for the sealing surface of the in-line of top, using conical surface seal form, for lower section oil return line it is close
Front cover, using flat seal form.Long needle-valve 17 is subject to contain oil after control chamber inner high voltage fuel pressure declines to a certain extent
When the inner high voltage fuel pressure of groove 19 is more than control chamber inner high voltage fuel oil and long 15 pretightning force of needle-valve back-moving spring, long needle-valve 17 is lifted
Rise, fuel injector commencement of fuel injection, because fuel oil lentamente releases in control chamber, long needle-valve 17 is first lentamente opened, with control chamber
The decline of fuel pressure, opening speed is gradually accelerated.When the power-off of coil 22 in electromagnetic valve component 1, armature 23 is multiple in valve rod
Control valve rod 29 is driven to take a seat in the presence of the spring 26 of position, the connection of middle oil duct 36 and low pressure oil duct 35 is again by control valve rod
29 blockings, the 3rd oil transportation road 30 are turned on to the oil circuit of middle oil duct 36, and high pressure fuel is via main oil gallery 4, the second oil transportation road
31st, the annular oil-feed metering-orifice 32 on intermediate mass 10, then passes through around the fuel-displaced metering-orifice 33 and panel 11 on panel 11
Connection oil duct 34, middle oil duct 36 around annular side oil duct 37 or main oil gallery 4, the 3rd oil transportation road 30, control valve rod 29,
Then pass through the annular side oil duct 37 around fuel-displaced metering-orifice 33 and panel 11 on panel 11 this two oil circuits to enter into
High pressure is started against in control chamber, the increase of oil-feed oil circuit improves fuel oil voltage built-up rate in control chamber, and long needle-valve 17 is subject to
The long needle-valve 17 that is more than with joint efforts downwards of control chamber inner high voltage fuel oil and long needle-valve back-moving spring 15 is fired by the inner high voltage of oil holding slot 19
After the active force upwards of oil, long needle-valve 17 is taken a seat rapidly, and fuel injector oil spout stops rapidly.
From the above-mentioned course of work：The design of panel of the present invention 11 and its surrounding oil circuit promotes panel 11 in work
All the time dynamic balance state is in during work, middle oil duct 36 also serves as control both as a part for control chamber draining oil circuit
A part for oil-feed oil circuit in chamber processed, control chamber draining beforehand control plate 11 can block annular oil-feed metering-orifice 32, substantially reduce spray
Fuel oil dynamic leakage amount when oily device works, reduces fuel oil loss, the injection pressure effectively improved in common rail pipe；While long needle-valve
17 first lentamente open in fuel injection beginning, and later on speed is accelerated, and can take a seat rapidly in end of injection, its motion rule
Rule meets the requirement of fuel injection characteristic anxious after electric-controlled fuel injector is realized first delaying, the oil spout for promoting electric-controlled fuel injector anxious after realizing first delaying
Rule, reduces the soot emissions and fuel consumption of diesel engine.
Claims (2)
1. the board-like electric-controlled fuel injector of two-way oil-feed minute hand valve opening, is characterized in that：Including oil injector body, electromagnetic valve component, electromagnetic valve
Seat, intermediate mass, panel, stop collar, long needle-valve, needle-valve limited block, nozzle, electromagnetic valve component, solenoid valve seat, intermediate mass, limit
Position covers, is arranged on from top to bottom in oil injector body, and needle-valve stop collar, nozzle are successively set on oil injector body lower section, oil injector body
In arrange main oil gallery, the first oil transportation road, back oil road, 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, and the upper end for controlling valve rod is located in iron core, and the lower end of control valve rod is 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, the 3rd oil transportation road is set in solenoid valve seat, control valve rod
Middle part and solenoid valve seat between formed control valve rod epicoele, the 3rd oil transportation road respectively with main oil gallery and control valve rod epicoele phase
It is logical；
Arrange 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；
Panel is installed in stop collar, fuel-displaced metering-orifice is set in panel, between panel and the stop collar on the outside of it ring is formed
Shape side oil channel, forms respectively annular oil-feed metering-orifice and interstitial hole, the upper end of long needle-valve between intermediate mass lower surface and panel
In stop collar, panel back-moving spring is installed between the top of long needle-valve and panel, the lower end of long needle-valve passes through needle-valve
Limited block is simultaneously stretched in nozzle, and control chamber, annular oil-feed metering-orifice connection second are formed between panel, stop collar and long needle-valve
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 oil duct,
Be respectively provided with that top is raised and lower section is raised on long needle-valve, spacing preiection be set on stop collar, top it is raised with spacing preiection it
Between long needle-valve back-moving spring is installed, lower section is raised to be coordinated with needle-valve limited block and limits long needle stroke, and top is raised convex with lower section
Low pressure oil pocket, low pressure oil pocket connection back oil road are formed between long needle-valve portion and its outside oil injector body between rising；
Oil holding slot is set in nozzle, and the end of nozzle arranges spray orifice, and long needle-valve coordinates the company of control spray orifice and oil holding slot with spray orifice
On-off is opened, and oil holding slot connects the first oil transportation road.
2. the board-like electric-controlled fuel injector of two-way oil-feed minute hand valve opening according to claim 1, is characterized in that：Coil is not powered on
When, control valve rod is crushed on intermediate mass, and control valve rod epicoele is communicated with oil duct be connected, low pressure oil duct and centre oil duct and company
Oil duct disconnection is connect, long needle-valve blocks spray orifice；After coil electricity, control valve rod is moved upwards with armature, controls valve rod epicoele and company
Connect oil duct disconnection, low pressure oil duct is communicated with oil duct, middle oil duct be connected, the fuel-displaced metering-orifices of fuel oil Jing of control intracavity, centre oil duct,
Connection oil duct, into low pressure oil duct, long needle-valve is lifted, spray orifice oil spout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710034574.4A CN106677941A (en) | 2017-01-18 | 2017-01-18 | Dual-channel oil feeding long needle valve hole plate type electronic controlled fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710034574.4A CN106677941A (en) | 2017-01-18 | 2017-01-18 | Dual-channel oil feeding long needle valve hole plate type electronic controlled fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106677941A true CN106677941A (en) | 2017-05-17 |
Family
ID=58859258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710034574.4A Pending CN106677941A (en) | 2017-01-18 | 2017-01-18 | Dual-channel oil feeding long needle valve hole plate type electronic controlled fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106677941A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061092A (en) * | 2017-06-28 | 2017-08-18 | 中国重汽集团重庆燃油喷射系统有限公司 | Electric-controlled fuel injector control valve |
| CN109083788A (en) * | 2018-07-26 | 2018-12-25 | 哈尔滨工程大学 | Booster-type with spool control valve can be changed the electric-controlled fuel injector of fuel injection characteristic |
| CN109184995A (en) * | 2018-07-26 | 2019-01-11 | 哈尔滨工程大学 | The variable heavy oil electromagnetism-piezoelectricity bivalve electric-controlled fuel injector of fuel injection characteristic |
| CN109236530A (en) * | 2018-07-26 | 2019-01-18 | 哈尔滨工程大学 | The variable heavy oil electric-controlled fuel injector of fuel injection characteristic |
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| CN107061092A (en) * | 2017-06-28 | 2017-08-18 | 中国重汽集团重庆燃油喷射系统有限公司 | Electric-controlled fuel injector control valve |
| CN109083788A (en) * | 2018-07-26 | 2018-12-25 | 哈尔滨工程大学 | Booster-type with spool control valve can be changed the electric-controlled fuel injector of fuel injection characteristic |
| CN109184995A (en) * | 2018-07-26 | 2019-01-11 | 哈尔滨工程大学 | The variable heavy oil electromagnetism-piezoelectricity bivalve electric-controlled fuel injector of fuel injection characteristic |
| CN109236530A (en) * | 2018-07-26 | 2019-01-18 | 哈尔滨工程大学 | The variable heavy oil electric-controlled fuel injector of fuel injection characteristic |
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Application publication date: 20170517 |