CN207064121U - A kind of high pressure fuel injector applied to high pressure common rail fuel injection system - Google Patents
A kind of high pressure fuel injector applied to high pressure common rail fuel injection system Download PDFInfo
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- CN207064121U CN207064121U CN201621486220.0U CN201621486220U CN207064121U CN 207064121 U CN207064121 U CN 207064121U CN 201621486220 U CN201621486220 U CN 201621486220U CN 207064121 U CN207064121 U CN 207064121U
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Abstract
A kind of high pressure fuel injector applied to high pressure common rail fuel injection system disclosed in the utility model, including oil injector body part, oil spout nozzle component, electromagnetic valve components.Its control valve group is made up of control valve seat and control valve element, and controls the cone angle of the upper conical section of valve element to be less than the cone angle of the axial seal bellmouth on control valve seat, so as to form a balancing valve structure, can greatly improve the response speed of electric-controlled fuel injector.The utility model sets center needle-valve jack in orifice plate, is filled with high pressure fuel in it, can greatly reduce the dynamic leakage amount of injector nozzle matching parts.Contact surface between injector nozzle matching parts of the present utility model, orifice plate, control valve group, oil injector body is precision surface, and compared with traditional fuel injector, the sealing and reliability of system can be significantly improved on the basis of difficulty of processing, process costs are not increased.
Description
Technical field
It the utility model is related to a kind of fuel injector, more particularly to a kind of high pressure applied to high pressure common rail fuel injection system
Fuel injector.
Background technology
Electrocontrolled high-pressure common rail fuel injection system, meet state three, state four or more maximum discharge standard as diesel engine
Optimal selection, it is made up of high-pressure fuel-feed pump, high pressure oil rail, electric-controlled fuel injector, ECU and sensor etc..Within the system, automatically controlled spray
Oily device is most critical and most complicated part, and its effect is the control signal sent according to ECU, by controlling magnetic valve
Open and close, by the fuel oil in high pressure oil rail with optimal injection timing, distributive value and fuel injection rate injection oil engine combustion chamber.
Typical high pressure common rail injector is by atomizer, control piston, control metering-orifice, control solenoid valve block into passing through fuel-displaced throttle orifice
Ball valve is controlled to control the pressure of hydraulic control room.When electromagnet no power, in the presence of each spring force of magnetic valve, ball valve
It is closed, now, the fuel pressure acted on control piston is more than the pressure of needle chamber, pin plus needle valve spring power
Valve is closed, and fuel injector does not spray.When solenoid valves, armature overcomes electromagnet in the presence of electromagnetic force, buffering elastic spring force
Spring force is done work and moved to electromagnet direction, and steel ball is opened in the presence of hydraulic coupling, and fuel oil passes through oil leak hole, oil injector body
Gap between sealing cone and steel ball connects with Engine Fuel Tank, and the fuel pressure for causing to act on control piston adds
Needle valve spring power is less than needle-valve cavity pressure, and needle-valve lifts, fuel injector commencement of fuel injection.
Though the typical common-rail injector efficiently utilizes the self-centering of steel ball, there is higher sealing property, also deposit
In certain deficiency.Quality such as movement parts control piston affects the dynamic responding speed of fuel injector, as fuel injector moves
The quality increase of part, motional inertia increase, the dynamic responding speed of fuel injector are slack-off；In addition, the leakage rate in pintle nozzle match-ing parts gap
It is larger, especially dynamic leakage amount.Therefore, many patented technologies all changed to the typical common-rail injector structure both at home and abroad
Enter, in document《Fuel injector patented technology research》On to propose the fuel injector technology of this typical structure main in evolution process
It is related to the improvement of electromagnet, pintle nozzle match-ing parts etc..Pointed out in document, the improvement for electromagnet, every invention mainly around how
It is set to produce bigger electromagnetic force and pressure, to accelerate the response speed of electric-controlled fuel injector.But with injection pressure raising,
To be processed under the existing process level and machining equipment of domestic fuel system manufacturing enterprise, the reliability of ball valve is difficult to ensure that,
Therefore this ball-valve structure is not suitable for 2000bar and the fuel injector of the above.Also indicated that in document, for changing for pintle nozzle match-ing parts
Enter, every invention is mainly set about from reduction accessory size tolerance grade and abrasion, reaches accurate control to reduce the leakage rate of couple
The effect of system, but manufacture difficulty, process costs can be significantly increased.
The content of the invention
Technical problem to be solved in the utility model is that the above-mentioned technology present in existing electric-controlled fuel injector is asked
Inscribe and the high pressure fuel injector applied to high pressure common rail fuel injection system that a kind of reliability is high, leakage rate is small is provided.
Technical problem to be solved in the utility model can be achieved through the following technical solutions：
A kind of high pressure fuel injector applied to high pressure common rail fuel injection system, it is characterised in that including：
Oil injector body part, the oil injector body part include oil injector body, clearance filter, upper bushing, steel ball, top
Bar, adjusting pad, under it is bushing；
External screw thread, fuel feed hole and lower external screw thread are provided with the oil injector body, the upper and lower external screw thread is set respectively
Put on the periphery of oil injector body upper and lower end, the fuel feed hole is arranged in the middle part of oil injector body；Set in the oil injector body
Be equipped with oil input channel, the first back oil road, the second back oil road, the 3rd back oil road, the 4th back oil road, the 5th back oil road, the 6th back oil road,
Electromagnetic valve components mounting hole, upper bushing mounting hole, push rod mounting hole, under bushing mounting hole and control valve group mounting hole, institute
State electromagnetic valve components mounting hole, upper bushing mounting hole, push rod mounting hole, under bushing mounting hole and the control valve group mounting hole
It is coaxially disposed, wherein electromagnetic valve components mounting hole installs hole, by the electromagnetic valve components being coaxially disposed and aperture is sequentially reduced
One electromagnetic valve components installation interstitial hole, second solenoid valve part installation interstitial hole and electromagnetic valve components installation lower opening composition, and
Electromagnetic valve components install the first oil-recovery tank that radial direction is provided with the bottom hole face in hole；Set on the bottom surface of the oil injector body
If there are the second oil-recovery tank and dry bottom positioning hole；
The entrance of the oil input channel connects with the bottom hole of the fuel feed hole, the outlet of the oil input channel and the oil injector body bottom
Face connects；First back oil road, the second back oil road, the axis of the 3rd back oil road and push rod mounting hole are vertically arranged, and described
The outer peripheral face of one back oil road, the second back oil road, the outlet port of the 3rd back oil road with the oil injector body connects, and described first
Back oil road is arranged on the second back oil road, the top of the 3rd back oil road, and the second back oil road and the 3rd back oil road is positioned close to institute
State the position of control valve group mounting hole and horizontally disposed, first back oil road, the second back oil road entrance respectively with it is described
The upper and lower part connection of push rod mounting hole；
4th back oil road, the 5th back oil road, the diameter parallel of the 6th back oil road and the push rod mounting hole are set, institute
The entrance for stating the 4th back oil road connects with first oil-recovery tank, and the outlet of the 4th back oil road connects with first back oil road
It is logical；The entrance of 5th back oil road and second solenoid valve part installation interstitial hole, the hole of electromagnetic valve components installation lower opening
Wall is connected, and the outlet of the 5th back oil road is connected with the centre position of second back oil road and passed through with first back oil road
It is logical；One end of 6th back oil road and second solenoid valve part installation interstitial hole, the hole of electromagnetic valve components installation lower opening
Wall is connected, and the other end of the 6th back oil road is connected with second oil-recovery tank and penetrated with the 3rd back oil road；
During assembling, first the steel ball part is knocked in first back oil road, makes that the steel ball is at least part of to be
It is higher by the outlet port of first back oil road, then the clearance filter is loaded in the fuel feed hole, it is described bushing to strike
Enter in the upper bushing mounting hole, contact the upper bushing bottom surface and the bottom hole face of the upper bushing mounting hole；Then will
The oil injector body turns around, will be described under bushing, adjusting pad be separately mounted to it is described under bushing mounting hole and control valve group
In mounting hole, make it is described under bushing bottom surface with it is described under the bottom hole face of bushing mounting hole contact, under described bushing top surface with
The upper surface contact of the adjusting pad, i.e., described upper and lower bushing mounted in pairs, make the outer peripheral face of the adjusting pad and the control
The first gap is left between the hole face of valve module mounting hole；Then the push rod is inserted into the push rod mounting hole, makes institute
State and the second gap is left between the hole face of push rod outer peripheral face and the push rod mounting hole, second gap is respectively with described first
Back oil road, the connection of the second back oil road；
Oil spout nozzle component, the oil spout nozzle component include injector nozzle matching parts, nozzle cap nut, orifice plate, pressure spring, control
Valve module, wherein the injector nozzle matching parts is made up of needle-valve body, needle-valve, the control valve group by control valve seat, control valve element,
Control valve spring, control valve spring pad and back-up ring composition；
Control valve element mounting hole, the top of the control valve element mounting hole and the control valve seat are provided with the control valve seat
Connected between face by the first sealing cone transition；First Transition oil-feed oil duct, transition are additionally provided with the control valve seat
Oil groove, the first oil-feed passageway, the first fuel-displaced passageway；The entrance of the First Transition oil-feed oil duct and the top surface of the control valve seat
Connection, the outlet of the First Transition oil-feed oil duct connect with the transition oil groove, the entrance in the first oil-feed passageway and institute
The bottom surface connection of control valve seat is stated, the outlet in the first oil-feed passageway connects with the control valve element mounting hole, and described first
The top surface suitable for reading with the control valve seat in fuel-displaced passageway connects, lower mouth and the control valve seat in the first fuel-displaced passageway
Bottom surface connects；It is configured with the top surface of the control valve seat and bottom surface and described oil injector body bottom position of positioning hole and quantity
Identical transition positioning hole；
The head of the control valve element is provided with a circlip groove, and it is close that the outline of middle part is from top to bottom followed successively by second
First sealing cone of the envelope conical surface, the face of cylinder, lower circular conical surface, second sealing cone and the control valve seat cooperatively forms close
Seal, some annular ring recess are provided with the face of cylinder of the control valve element lower end；
The second transition oil-feed oil duct, center needle-valve jack, the second oil-feed passageway, the second fuel-displaced mistake are provided with the orifice plate
Road, the second transition oil-feed oil duct are made up of needle-valve passage metering-orifice and transition oil-feed oil hole, wherein the transition oil-feed is oily
The internal diameter in road hole is more than the internal diameter of the needle-valve passage metering-orifice；The second oil-feed passageway is from top to bottom successively by oil-feed passageway
Hole, oil-feed metering-orifice and oil-feed inclined hole composition, the internal diameter in oil-feed passageway hole are equal to the internal diameter of the oil-feed inclined hole and are all higher than
The internal diameter of the oil-feed metering-orifice；The second fuel-displaced passageway is from top to bottom successively by fuel-displaced passageway hole, oil spilling metering-orifice, fuel-displaced inclined hole
Composition, the internal diameter in the fuel-displaced passageway hole are equal to the internal diameter of the fuel-displaced inclined hole and are all higher than the internal diameter of the oil spilling metering-orifice, institute
The internal diameter for stating oil spilling metering-orifice is more than the internal diameter of the oil-feed metering-orifice；The bottom hole face of the center needle-valve jack and the oil-feed are oblique
Hole, the bottom hole connection of fuel-displaced inclined hole, the aperture of the center needle-valve jack connects with the bottom surface of the orifice plate；The top of the orifice plate
Face is configured with and the control valve seat transition position of positioning hole and quantity identical upper Positioning holes and oil holding slot；The bottom of the orifice plate
Face is configured with lower Positioning holes；
The upper top side configuration of the needle-valve body has and the orifice plate lower Positioning holes position and quantity identical upper Positioning holes, institute
State and needle-valve mounting hole is axially provided with needle-valve body, contains oil pocket, needle-valve blister cavities, lead between the needle-valve mounting hole and needle-valve blister cavities
Cross the 3rd sealing cone transition connection；The 3rd oil-feed passageway is additionally provided with the needle-valve body, the 3rd oil-feed passageway enters
Mouth connects with the top surface of the needle-valve body, and the outlet in the 3rd oil-feed passageway connects with the Sheng oil pocket；
The needle-valve includes the valve stem being made up of the first bar segment, the second bar segment, the 3rd bar segment and positioned at the valve stem
The needle portion of one end, the valve stem are connected with the needle portion by the 4th sealing cone transition, the 4th sealing cone
Sealing is cooperatively formed with the 3rd sealing cone of the needle-valve body；A valve shoulder is formed between first bar segment and the second bar segment
Face；
During assembling, the needle-valve is inserted into the needle-valve mounting hole first, partner accurate injector nozzle matching parts；
Then the control valve element is inserted into the control valve element mounting hole on the control valve seat, the control valve element
The couple that the face of cylinder of lower end forms small―gap suture with the control valve element mounting hole coordinates, and the second sealing of the control valve element
At least part of conical surface is above the small end of the first sealing cone of the control valve seat；The second of the control valve element
Part sealing cone, the face of cylinder, lower circular conical surface and the end portion face of cylinder of sealing cone and the control valve element mounting hole
Hole face between form a high-voltage oil cavity, the high-voltage oil cavity connects with the first oil-feed passageway in the control valve seat；Then
The control valve spring, control valve spring pad, back-up ring are placed in the top face composition control valve of the control valve seat successively
Component, the bottom surface of control valve spring is set to be contacted with the top surface of control valve seat, top surface and the control valve spring pad of control valve spring
Bottom surface is contacted, and the top surface of control valve spring pad is contacted with the bottom surface of back-up ring, and back-up ring is caught in circlip groove；
Then pressure spring is placed on the injector nozzle matching parts, some orifice plate alignment pins is inserted into the orifice plate bottom
In the lower Positioning holes in face, then the orifice plate is placed on the top surface of the needle-valve body, and inserts some orifice plate alignment pins
The needle-valve body is positioned in the needle-valve body upper Positioning holes, the bar segment of needle-valve first is inserted into the orifice plate
In the needle-valve jack of center and with one heart, make to leave between the needle-valve upper surface and the bottom surface of the center needle-valve jack first away from
From making the lower mouth of the entrance and the second transition oil-feed oil hole on the orifice plate in the 3rd oil-feed passageway in the needle-valve body right
Together, contact the upper surface of the pressure spring and the bottom hole face of the center needle-valve jack of the orifice plate, lower end is overlapped on described
On the valve shoulder face of needle-valve, the sealing cone of the needle-valve the 4th is set to be fitted in the needle-valve body in the presence of the pressure spring
On three sealing cones；
Then the control valve group is arranged on the top surface of the orifice plate, passes through some control valve group alignment pins
The control valve seat transition positioning hole positions to the control valve group, makes the First Transition oil-feed in the control valve seat
Suitable for reading the aliging of the lower mouth of oil duct and the second transition oil-feed oil duct in the orifice plate, make the bridging oil of the control valve seat bottom surface
Groove connects with the second oil-feed passageway of the orifice plate, makes the lower mouth in the first oil-feed passageway in the control valve seat and the orifice plate
The second fuel-displaced passageway alignment suitable for reading, make the lower mouth in the first fuel-displaced passageway in the control valve seat and the Sheng oil of the orifice plate
Groove connects；
Then the oil injector body part is arranged on the top surface of the control valve seat, positions some control valve groups
Pin is inserted into the positioning hole of the oil injector body bottom and the oil injector body part is positioned, and makes the first of the control valve seat
The outlet suitable for reading with the oil input channel of the oil injector body of transition oil-feed oil duct is alignd, and the control valve element is inserted into the spray
In the control valve group mounting hole of oily body and with one heart, the top surface of the control valve element is set to be contacted with push rod bottom surface, described in apolegamy
Adjusting pad, make to leave second distance between the adjusting pad and the control valve element, make the outer peripheral face of the control valve spring pad
Third space is left between the hole face of the control valve group mounting hole, the third space connects with second oil-recovery tank
And connected with the 6th back oil road；Then the nozzle cap nut is from top to bottom enclosed on the oil spout nozzle component, fuel injector
On body component and tighten.
Electromagnet component, electromagnet component include electromagnet, electromagnet spring, electromagnet spring washer, armature component, slow
Rush the very tight cap of spring, electromagnetism, O-ring seal, electromagnetism iron washer, wherein armature component is partnered precision by armature and armature lever
The couple of cooperation.
O-ring seal groove, regulator bolts mounting hole, armature component mounting hole, electromagnet pad are provided with the electromagnet
Enclose mounting surface.
Buffer spring mounting surface is provided with the armature；
First the electromagnet is turned around during assembling, the O-ring seal is arranged on the electromagnet O type sealing rings
In groove, the electromagnet spring, electromagnet spring washer, the armature component with milled are then placed in the armature group successively
In part mounting hole, the bottom hole face that the top surface of the electromagnet spring and the armature component are installed is contacted, makes the electromagnet
The bottom surface of spring contacts with the top surface of the electromagnet spring washer, makes the top surface of the armature lever and the electromagnet spring pad
The bottom surface contact of circle；The electromagnetism iron washer is enclosed on the electromagnet again, makes upper surface and the institute of the electromagnetism iron washer
State the contact of electromagnetism iron washer mounting surface；The buffer spring is enclosed on the outer surface on the armature head again, makes the buffering
The upper surface of spring contacts with the buffer spring mounting surface；
Then the electromagnetic valve components are arranged in the electromagnetic valve components mounting hole of the oil injector body, make the electromagnetism
Left between the hole wall of the first electromagnetic valve components installation interstitial hole of iron, the outer peripheral face of armature and the oil injector body between the 4th
Gap, the 4th gap connect with the 4th back oil road, the 5th back oil road, the 6th back oil road, make the electromagnetism iron washer
The bottom hole face that bottom surface installs hole with the electromagnetic valve components contacts, and matches electromagnetism iron washer again, makes the electromagnet and rank
The 3rd distance is left between iron, the head of the armature is inserted into the electromagnetic valve components installation lower opening and with one heart, makes institute
The bottom surface for stating armature lever is in contact with the top surface of the push rod, makes the bottom surface of the buffer spring and the second solenoid valve part
The bottom hole face contact of interstitial hole is installed, finally tightened the very tight cap sleeve of the electromagnetism on electromagnet component.
In a preferred embodiment of the present utility model, the oil holding slot is Pear-Shaped oil holding slot.
In a preferred embodiment of the present utility model, second oil-recovery tank is butterfly oil-recovery tank.
In a preferred embodiment of the present utility model, the bottom surface of the oil injector body is precision machined surface.
In a preferred embodiment of the present utility model, the top surface of the control valve seat and bottom surface are precision machined surface.
In a preferred embodiment of the present utility model, the top surface of the orifice plate and bottom surface are precision machined surface.
In a preferred embodiment of the present utility model, the upper top surface of the needle-valve body is precision machined surface.
In a preferred embodiment of the present utility model, the cone angle of the second sealing cone of the control valve seat is less than institute
The cone angle of the first sealing cone on control valve seat is stated, in electromagnet no power, the axial force suffered by high-voltage oil cavity is
Zero.
As a result of technical scheme as above, the utility model has following excellent compared with existing common-rail injector
Point：
1st, high pressure fuel injector of the present utility model can reduce oil spout without the inlet connector of other traditional common rail fuel injectors
The risk of leakage of device.
2nd, the control valve group of high pressure fuel injector of the present utility model is designed to balancing valve structure, can greatly improve automatically controlled spray
The response speed of oily device.
3rd, the pressure difference of the injector nozzle matching parts gap import and export of high pressure fuel injector of the present utility model is far smaller than traditional common rail
The pressure difference of import and export between oil injector oil nozzle couple, the dynamic leakage amount by injector nozzle matching parts can be greatly reduced.
4th, the design on the high pressure sealing surface of high pressure fuel injector of the present utility model can effectively reduce static leakage amount.Compare
Traditional common-rail injector reduces the method for leakage rate by reducing accessory size tolerance grade and the abrasion of couple, this to pass through
Control precision surface tolerance grade method be easier realize, therefore the utility model can substantially reduce difficulty of processing and technique into
This, while can effectively improve the sealing and reliability of system.
Brief description of the drawings
Fig. 1 is the high pressure fuel injector structural representation that the utility model is applied to high pressure common rail fuel injection system.
Fig. 2 is the utility model oil injector body bottom surface structure schematic diagram.
Fig. 3 is close-up schematic view at A in Fig. 1.
Fig. 4 is close-up schematic view at Fig. 1 B.
Fig. 5 is the control valve seat bottom surface knot for the high pressure fuel injector that the utility model is applied to high pressure common rail fuel injection system
Structure schematic diagram.
Embodiment
In order that technological means, creation characteristic, reached purpose and effect that the utility model is realized are easy to understand, under
Face combines and is specifically illustrating, and the utility model is expanded on further.
Referring to Fig. 1, Fig. 2 and Fig. 4, a kind of high pressure fuel injector applied to high pressure common rail fuel injection system shown in figure
Device, it is assembled by oil injector body part, oil spout nozzle component, electromagnet component, concrete structure is as follows：
Oil injector body part 100 includes oil injector body 110, clearance filter 120, upper bushing 130, steel ball 140, push rod
150th, adjusting pad 160, under bushing 130a.
External screw thread 110a, fuel feed hole 110b and lower external screw thread 110c are provided with oil injector body 110, it is upper and lower outer
Screw thread 110a, 110c are separately positioned on the periphery of the upper and lower end of oil injector body 110, and fuel feed hole 110b is arranged on oil injector body
110 middle parts.
Be provided with oil injector body 110 oil input channel 110d, the first back oil road 110e, the second back oil road 110f, the 3rd time
Oil duct, the 4th back oil road 110h, the 5th back oil road 110i, the 6th back oil road 110j, electromagnetic valve components mounting hole, upper bushing installation
Hole 110k, push rod mounting hole 110l, under bushing mounting hole 110m and control valve group mounting hole 110n, wherein electromagnetic valve components
Mounting hole, upper bushing mounting hole 110k, push rod mounting hole 110l, under bushing mounting hole 110m and control valve group mounting hole 110n
It is coaxially disposed, electromagnetic valve components mounting hole installs hole 110o, by the electromagnetic valve components being coaxially disposed and aperture is sequentially reduced
One electromagnetic valve components installation interstitial hole 110p, second solenoid valve part installation interstitial hole 110q and electromagnetic valve components installation lower opening
110r is formed, and the first oil-recovery tank 110s of radial direction is provided with the bottom hole face that electromagnetic valve components install hole 110o；Oil spout
If the second oil-recovery tank 110t and dry bottom positioning hole 110u are provided with the bottom surface of body 110.The bottom surface of oil injector body 110 is
Precision machined surface, the second oil-recovery tank 110t are butterfly oil-recovery tank.
Oil input channel 110d entrance connects with fuel feed hole 110b bottom hole, and outlet connects with the bottom surface of oil injector body 110.
First back oil road 110e, the second back oil road 110f, the 3rd back oil road are vertical with push rod mounting hole 110l axis to be set
Put, the outer peripheral face of the outlet port of three with oil injector body 110 connects, wherein the first back oil road 110e is arranged on the second oil return
Road 110f, the 3rd back oil road top, and the second back oil road 110f and the 3rd back oil road are positioned close to control valve group installation
The position in hole and horizontally disposed, the first back oil road 110e, the second back oil road 110f entrance are respectively with push rod mounting hole 110l's
Upper and lower part connects；
4th back oil road 110h, the 5th back oil road 110i, the 6th back oil road 110j and push rod mounting hole 110l axis are put down
Row is set, and the 4th back oil road 110h entrance connects with the first oil-recovery tank 110s, and outlet connects with the first back oil road 110e；5th
Back oil road 110i entrance connects with second solenoid valve part installation interstitial hole 110q, electromagnetic valve components installation lower opening 110r hole walls
Logical, outlet is connected with the second back oil road 110f centre position and penetrated with the first back oil road 110e；6th back oil road 110j mono-
The hole wall that lower opening 110r is installed at end with second solenoid valve part installation interstitial hole 110q, electromagnetic valve components connects, the other end and the
Two oil-recovery tank 110t are connected and penetrated with the 3rd back oil road.
During assembling, first the part of steel ball 140 is knocked in the first back oil road 110e, it is high to make steel ball 140 at least part of
Go out the first back oil road 110e outlet port, then clearance filter 120 is loaded in fuel feed hole 110b, upper bushing 130 knock in
In bushing mounting hole 110k, bushing 130 bottom surface is set to be contacted with upper bushing mounting hole 110k bottom hole face, then by fuel injector
Body 110 turns around, and bushing 130a, adjusting pad 160 are separately mounted to down bushing mounting hole 110m, control valve group mounting hole by under
In 110n, bushing 130 bottom surface bushing mounting hole 110m bottom hole face with contacts under making, the upper end of top surface and adjusting pad 160
Face contacts, i.e., upper and lower bushing mounted in pairs, make the outer peripheral face of adjusting pad 160 and control valve group mounting hole 110n hole face it
Between leave gap h1；Then push rod 150 is inserted into push rod mounting hole 110l, the outer peripheral face of push rod 150 and push rod mounting hole
Gap h2 is left between 110l hole face, and gap h2 connects with the first back oil road 100e, the second back oil road 100f respectively.
Oil spout nozzle component 200 includes injector nozzle matching parts 210, nozzle cap nut 220, orifice plate 230, pressure spring 240, control
Valve module 250, wherein injector nozzle matching parts are made up of needle-valve body 211, needle-valve 212, and control valve group 250 is by control valve seat 251, control
Valve element 252, control valve spring 253, control valve spring pad 254 and back-up ring 255 processed form.
Referring to Fig. 1, Fig. 3 and Fig. 5, the top surface of control valve seat 251 and bottom surface are Precision Machining face, are provided with control in it
Valve element mounting hole 251a, connected between the control valve element mounting hole and the top surface of control valve seat 251 by sealing cone 251b transition,
First Transition oil-feed oil duct 251c, transition oil groove 251d, the first oil-feed passageway 251e, are additionally provided with control valve seat 251
One fuel-displaced passageway 251f, wherein First Transition oil-feed passageway 251c entrance connect with the top surface of control valve seat 251, outlet and transition
Oil groove 251d is connected, and the first oil-feed passageway 251e entrance connects with the bottom surface of control valve seat 251, outlet and control valve element installation
Hole 251a is connected；The top surface of first fuel-displaced passageway 251f suitable for reading and control valve seat 251 connects, lower mouth and the bottom of control valve seat 251
The connection in face；It is configured with the top surface of control valve seat 251 and bottom surface and the bottom positioning hole 110u positions of oil injector body 110 and quantity
Identical transition positioning hole 251g.
Referring to Fig. 1 and Fig. 3, control valve element 252 head is provided with a circlip groove 252a, the outline of middle part by upper and
Under be followed successively by sealing cone 252b, face of cylinder 252c, lower circular conical surface 252d, sealing cone 252b cone angle rain and control valve seat
251 sealing cone 251b cone angle, both cooperatively form sealing, control and are provided with the lower end face of cylinder 252e of valve element 252
Some annular ring recess 252f.
Referring to Fig. 1, the top surface of orifice plate 230 and bottom surface are precision machined surface, are inside provided with the second transition oil-feed oil duct
231st, center needle-valve jack 232, the second oil-feed passageway 233, the second fuel-displaced passageway 234, wherein the second transition oil-feed oil duct 231
It is made up of needle-valve passage metering-orifice 231a and transition oil-feed oil hole 231b, and transition oil-feed oil hole 231b internal diameter is more than pin
Valve passage metering-orifice 231a internal diameter；Second oil-feed passageway 233 is from top to bottom successively by oil-feed passageway hole 233a, oil-feed metering-orifice 233b
With oil-feed inclined hole 233c form, wherein oil-feed passageway hole 233a internal diameter be equal to oil-feed inclined hole 233c internal diameter, and be all higher than into
Oil mass hole 233b internal diameter；Second fuel-displaced passageway 234 from top to bottom by fuel-displaced passageway hole 234a, oil spilling metering-orifice 234b and goes out successively
Oily inclined hole 234c compositions, wherein fuel-displaced passageway hole 234a internal diameter is equal to fuel-displaced inclined hole 234c internal diameter, and are all higher than oil spillage
Hole 234b internal diameter, and oil spilling metering-orifice 234b internal diameter is more than oil-feed metering-orifice 233b internal diameter；The bottom hole of center needle-valve jack 232
Face connects with the bottom hole of oil-feed inclined hole, fuel-displaced inclined hole, and aperture connects with the bottom surface of orifice plate 230；The top side configuration of orifice plate 230 have with
Control valve seat transition position of positioning hole and quantity identical upper Positioning holes 235 and oil holding slot 236, oil holding slot 236 are contained for Pear-Shaped
Oil groove；The bottom surface of orifice plate 230 is configured with lower Positioning holes 237.
Referring to Fig. 1, the upper top surface of needle-valve body 211 is precision machined surface, is configured with the lower positioning with orifice plate 230 thereon
Hole site and quantity identical upper Positioning holes (not shown), needle-valve mounting hole 211a is axially provided with needle-valve body 211, is contained
Connected between oil pocket 211b, needle-valve blister cavities 211c, needle-valve mounting hole 211a and needle-valve blister cavities 211b by sealing cone 211d transition
Connect；The 3rd oil-feed passageway 211e is additionally provided with needle-valve body 211, its entrance connects with the top surface of needle-valve body 211, and outlet is with containing oil
Chamber 211b is connected.
Needle-valve 212 is included by the first bar segment 212a, the second bar segment 212b and the 3rd bar segment the 212c valve stem formed and position
Needle portion 212d in valve stem one end, the 3rd bar segment 212c and needle portion 212d of valve stem pass through sealing cone 212e mistakes
Connection is crossed, sealing cone 212e and needle-valve body 211 sealing cone 211d cooperatively form sealing；First bar segment 212a and second
Valve shoulder face 212f is formed between bar segment 212b.
During assembling, needle-valve 212 is inserted in the needle-valve mounting hole 211a of needle-valve body 211 first, partner accurate oil spout
Mouth couple.
Then control valve element 252 is inserted into the control valve element mounting hole 251a on control valve seat 251, controlled under valve element
Face of cylinder 252e is held to coordinate with controlling valve element mounting hole 251a to form the couple of small―gap suture；And the sealing cone of control valve element 252
252b at least part of is above the sealing cone 251b of control valve seat 251 small end；Control the sealed taper of valve element 252
Face 252b part conic sealing surface, face of cylinder 252c, lower circular conical surface 252d and end portion face of cylinder 252e and control valve
A high-voltage oil cavity 256 is formed between core mounting hole 251a hole face, the high-voltage oil cavity 256 enters with first in control valve seat 251
Oily passageway 251e connections；Then control valve spring 253, control valve spring pad 254, back-up ring 255 are placed in control valve seat successively
251 top face composition control valve module 250, makes the bottom surface of control valve spring 253 be contacted with the top surface of control valve seat 251,
The top surface of control valve spring 253 contacts with the bottom surface of control valve spring pad 254, the top surface and back-up ring of control valve spring pad 254
255 bottom surface contact, back-up ring 255 are caught in circlip groove 252a.
Then pressure spring 240 is placed on injector nozzle matching parts 210, some orifice plate alignment pin (not shown)s is inserted
Enter into the lower Positioning holes of the bottom surface of orifice plate 230, be then placed in orifice plate 230 on the top surface of needle-valve body 211, and make some orifice plates
Alignment pin (not shown) is inserted into (not shown) in needle-valve body upper Positioning holes and needle-valve body 211 is positioned, and makes pin
First bar segment 212a of valve 212 is inserted into the center needle-valve jack 232 of orifice plate 230 and with one heart, makes the upper surface of needle-valve 212 with
The distance between bottom surface of heart needle-valve jack 232 is △ 1, makes entrance and the hole of the 3rd oil-feed passageway 211b in needle-valve body 211
The lower mouth alignment of the second transition oil-feed oil hole 231 on plate 230, makes in upper surface and the orifice plate 230 of pressure spring 240
The bottom hole face contact of heart needle-valve jack 232, lower end are overlapped on the valve shoulder face 212f of needle-valve 212, make the sealed taper of needle-valve 212
Face 212e is fitted in the presence of pressure spring 240 on the sealing cone 211d of needle-valve body 211.
Then control valve group 250 is arranged on the top surface of orifice plate 230, makes some control valve group alignment pins (in figure
It is not shown) control valve group is positioned through control valve seat transition positioning hole 251g, make the first mistake in control valve seat 251
Cross oil-feed oil duct 251c lower mouth to align with the second the suitable for reading of transition oil-feed oil duct 231 in orifice plate 230, make control valve seat 251
The transition oil groove 251d of bottom surface connects with the second oil-feed passageway 233 of orifice plate 230, makes the first oil-feed in control valve seat 251
Road 251e lower mouth aligns with the second of orifice plate 230 the fuel-displaced the suitable for reading of passageway 234, makes the first fuel-displaced mistake in control valve seat 251
Road 251f lower mouth connects with the oil holding slot 236 of orifice plate 230.
Then oil injector body part 100 is arranged on the top surface of control valve seat 251, makes some control valve group alignment pins
(not shown) is inserted into the bottom positioning hole 110u of oil injector body 110 and oil injector body part 100 is positioned, and makes control valve
The oil input channel 110d of the First Transition oil-feed oil duct 251c of seat suitable for reading and oil injector body 110 outlet is alignd, and makes control valve element
252 are inserted into the control valve group mounting hole 110n of oil injector body 110 and with one heart, make the top surface and push rod of control valve element 252
150 bottom surfaces contact, and match adjusting pad 160, and it is △ to make the distance between the top surface of the bottom surface of adjusting pad 160 with controlling valve element 252
2, make to leave gap h3 between the outer peripheral face of control valve spring pad 254 and control valve group mounting hole 110n hole face, the gap
H3 is connected with the second oil-recovery tank 110t of the bottom surface of oil injector body 110 and connected with the 6th back oil road 110j；Then it is oil spout is tight-lipped
Cap 220 is from top to bottom enclosed on oil spout nozzle component 200, on oil injector body part 100 and tightens.
Electromagnet component 300 includes electromagnet 310, electromagnet spring 320, electromagnet spring washer 330, armature component
340th, the very tight cap 360 of buffer spring 350, electromagnetism, O-ring seal 370, electromagnetism iron washer 380, wherein armature component 340 is by holding in the mouth
Iron 341 and armature lever 342 partner the couple of precision-fit.
Be provided with electromagnet O-ring seal groove 310a, regulator bolts mounting hole 310b, armature component mounting hole 310c,
Electromagnetism iron washer mounting surface 310d；Buffer spring mounting surface 241a is provided with armature 241.
First electromagnet 310 is turned around during assembling, O-ring seal 370 is arranged on electromagnet O-ring seal groove 310a
It is interior, electromagnet spring 320, electromagnet spring washer 330, the armature component 340 with milled are then placed in armature group successively
In part mounting hole 310c, the top surface of electromagnet spring 320 is contacted with armature component installation 310c bottom hole face, make electromagnet bullet
The bottom surface of spring 320 contacts with the top surface of electromagnet spring washer 330；Make the top surface of armature lever 342 and the electromagnet spring pad
The bottom surface contact of circle 330；Electromagnetism iron washer 380 is enclosed on the electromagnet again, makes upper surface and the electricity of electromagnetism iron washer 380
Magnet packing ring mounting surface 310d is contacted；The buffer spring 350 is enclosed on the outer surface on the head of armature 341 again, made described slow
The upper surface for rushing spring contacts with the buffer spring mounting surface 241a.
Then by electromagnetic valve components 300 be arranged on oil injector body 110 electromagnetic valve components mounting hole in, make electromagnet 310,
Gap h4 is left between the outer peripheral face of armature 341 and the first electromagnetic valve components installation interstitial hole 110p of oil injector body hole wall,
Gap h4 connects with the 4th back oil road 110h, the 5th back oil road 110i, the 6th back oil road 110j of oil injector body, makes electromagnet
The bottom hole face that the bottom surface of packing ring 380 installs hole 110o with electromagnetic valve components contacts, and matches electromagnetism iron washer 380 again, makes electricity
The distance between magnet and armature are △ 3, make armature 341 head be inserted into it is in electromagnetic valve components installation lower opening 110r and same
The heart, the bottom surface of armature lever 342 is in contact with the top surface of push rod 150, make bottom surface and the second solenoid valve part of buffer spring 350
Interstitial hole 110q bottom hole face contact is installed, finally the very tight cap 360 of electromagnetism is enclosed on electromagnet component 300 and tightened.
The course of work of fuel injector of the present utility model is as follows：Referring to Fig. 1, the high pressure fuel in common rail pipe is through fuel feed hole
After clearance filter 120 in 110b filters, enter by the oil input channel 110e and control valve seat First Transition of oil injector body 110
It is divided into two-way after oil duct 251c, transition oil groove 251d, the needle-valve passage metering-orifice all the way through the second transition oil-feed oil duct 231
231a, transition oil-feed oil hole 231b, the 3rd oil-feed passageway 211e enter needle-valve body and contain oil pocket 211b and constantly full of Sheng oil pocket
During 211b, oil-feed passageway hole 233a of the another way through the second oil-feed passageway 233, oil-feed metering-orifice 233b, oil-feed inclined hole 233c enter
Heart needle-valve jack 232 acts on and on needle-valve 212, until being full of after center needle-valve jack 232 again through the second fuel-displaced passageway 234
Fuel-displaced inclined hole 234c, oil spilling metering-orifice 234b, fuel-displaced passageway hole 234a, the first oil-feed passageway 251e enter in high-voltage oil cavity 256.
It is the small end positioned at the sealing cone 251b of control valve seat 251 because the sealing cone 252b of control valve element 252 is at least part of
Top, when electromagnet no power, oil pressure is zero to controlling the axial force of valve element 252 in high-voltage oil cavity 256, now, control
Valve element 252 processed, push rod 150, armature component 340 are used as an entirety, in electromagnet spring force F1, buffering elastic spring force F2, control
Effect of the low-voltage fuel oil pressure to control valve element in valve spring force F3 and oil holding slot 236 and control valve group mounting hole 110n
In the presence of power F4, the sealing cone 252b of control valve element 252 is tightly fitted on the sealing cone 251b of control valve seat 251,
A seal band 252g is formed, meanwhile, the effect of the hydraulic resultant force F5 suffered by the spring force F1 and needle-valve in pressure spring 240
Under, needle-valve 211 is closed.
When fuel injector electromagnet 310 is powered, electromagnet 310 adds buffer spring to electromagnetic force F6 caused by armature 341
Power F2 will be far longer than electromagnet spring force F1, therefore armature component 340 moves rapidly to the direction of electromagnet 310, and movement is most
Big distance is △ 3, push rod 150, controls the stress balance of valve element 252 to be broken, and push rod 150, control valve element 252 are in control valve bullet
Moved together to the direction of electromagnet 310 in the presence of spring force F3, now, seal band 252g disappears immediately, in high-voltage oil cavity 256
Fuel oil it is most of by control gap between the sealing cone 252b of valve element 252 and the sealing cone 251b of control valve seat 251,
Second oil-recovery tank 110t, the 6th back oil road 100j, the 3rd back oil road (not shown) return engine fuel tank, sub-fraction
By the second oil-recovery tank 110t, control valve group mounting hole 110n, gap h3, the through hole of adjusting pad 160 and gap h1, under it is bushing
130 through hole, gap h2, the second back oil road 110f return engine fuel tanks.Therefore, the fuel oil in center needle-valve jack 232
Rapid pressure drop, when controlling the distance of the movement of valve element 252 to be △ 2, that is, control upper surface and the adjusting pad 160 of valve element 252
Lower surface be in contact, by controlling the fuel flow communication area of valve element 252 to reach maximum, the fuel oil in center needle-valve jack 232
Pressure further declines, and pressure regulation bullet is added to the active force of needle-valve 212 when the oil pressure in center needle-valve jack 232 drops to oil pressure
Spring force F5 is less than when containing oil pressure in oil pocket 211c to the active force of needle-valve 212, and needle-valve 212 is opened, fuel injection beginning, when on needle-valve
When moving distance △ 2, needle-valve upper surface contacts with the bottom hole face of center needle-valve jack 232, and lift reaches maximum.
When fuel injector electromagnet 310 powers off, because electromagnet spring force F1 design load is significantly larger than buffering elastic spring force
Hydraulic coupling F4's suffered by F2 and control valve spring power F3, control valve element makes a concerted effort, therefore armature component 340 is to away from electromagnet
310 direction movement, promote push rod 150, control valve element 252 overcome control valve spring power F3, control valve element on hydraulic coupling F4
Acting moves downward, until the sealing cone 252b of control valve element 252 is bonded with the sealing cone 251b of control valve seat 251, it is close
Seal ring band 252g is re-formed, and so as to cut off the passage that the fuel oil in high-voltage oil cavity 256 flows to low pressure oil way, center needle-valve is inserted
Fuel pressure in hole 232 is gradually increasing, and the fuel oil in high-voltage oil cavity 256 rises immediately, the oil in center needle-valve jack 232
Pressure is increased to oil pressure and pressure spring power F5 is added to the active force of needle-valve 212 more than oil pressure in Sheng oil pocket 211c to needle-valve 212
During active force, needle-valve 212 starts to move downward, and is sealed when needle-valve 212 is moved to sealing cone 212e and fits to needle-valve body 211
During conical surface 211d, needle-valve is closed, end of injection.
The advantages of general principle of the present utility model, principal character and the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply principle of the present utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model also has
Various changes and modifications, these changes and improvements are both fallen within claimed the scope of the utility model, the requires of the utility model
Protection domain has appended claims and its equivalent to define.
Claims (8)
- A kind of 1. high pressure fuel injector applied to high pressure common rail fuel injection system, it is characterised in that including：Oil injector body part, the oil injector body part include oil injector body, clearance filter, upper bushing, steel ball, push rod, tune It is whole pad, under it is bushing；External screw thread, fuel feed hole and lower external screw thread are provided with the oil injector body, the upper and lower external screw thread is separately positioned on On the periphery of oil injector body upper and lower end, the fuel feed hole is arranged in the middle part of oil injector body；It is provided with the oil injector body Oil input channel, the first back oil road, the second back oil road, the 3rd back oil road, the 4th back oil road, the 5th back oil road, the 6th back oil road, electromagnetism Valve member mounting hole, upper bushing mounting hole, push rod mounting hole, under bushing mounting hole and control valve group mounting hole, the electricity Magnet valve member mounting holes, upper bushing mounting hole, push rod mounting hole, under bushing mounting hole and the control valve group mounting hole it is coaxial Set, wherein electromagnetic valve components mounting hole installs hole, the first electricity by the electromagnetic valve components being coaxially disposed and aperture is sequentially reduced Magnet valve part installation interstitial hole, second solenoid valve part installation interstitial hole and electromagnetic valve components installation lower opening composition, and in electromagnetism Valve member installs the first oil-recovery tank that radial direction is provided with the bottom hole face in hole；Is provided with the bottom surface of the oil injector body If two oil-recovery tanks and dry bottom positioning hole；The entrance of the oil input channel connects with the bottom hole of the fuel feed hole, and the outlet of the oil input channel connects with the oil injector body bottom surface It is logical；First back oil road, the second back oil road, the axis of the 3rd back oil road and push rod mounting hole are vertically arranged, described first time The outer peripheral face of oil duct, the second back oil road, the outlet port of the 3rd back oil road with the oil injector body connects, first oil return Road is arranged on the second back oil road, the top of the 3rd back oil road, and the second back oil road and the 3rd back oil road is positioned close to the control The position of valve module mounting hole processed and horizontally disposed, first back oil road, the second back oil road entrance respectively with the push rod The upper and lower part connection of mounting hole；4th back oil road, the 5th back oil road, the diameter parallel of the 6th back oil road and the push rod mounting hole are set, and described the The entrance of four back oil roads connects with first oil-recovery tank, and the outlet of the 4th back oil road connects with first back oil road；Institute The hole wall for stating the entrance and second solenoid valve part installation interstitial hole, electromagnetic valve components installation lower opening of the 5th back oil road connects Logical, the outlet of the 5th back oil road is connected with the centre position of second back oil road and penetrated with first back oil road； One end of 6th back oil road and the hole wall of second solenoid valve part installation interstitial hole, electromagnetic valve components installation lower opening connect Logical, the other end of the 6th back oil road is connected with second oil-recovery tank and penetrated with the 3rd back oil road；Oil spout nozzle component, the oil spout nozzle component include injector nozzle matching parts, nozzle cap nut, orifice plate, pressure spring, control valve group Part, wherein the injector nozzle matching parts is made up of needle-valve body, needle-valve, the control valve group is by control valve seat, control valve element, control Valve spring, control valve spring pad and back-up ring composition；Be provided with control valve element mounting hole in the control valve seat, the top surface of the control valve element mounting hole and the control valve seat it Between pass through the first sealing cone transition connect；Be additionally provided with the control valve seat First Transition oil-feed oil duct, transition oil groove, First oil-feed passageway, the first fuel-displaced passageway；The entrance of the First Transition oil-feed oil duct connects with the top surface of the control valve seat, The outlet of the First Transition oil-feed oil duct connects with the transition oil groove, entrance and the control in the first oil-feed passageway The bottom surface connection of valve seat, the outlet in the first oil-feed passageway connect with the control valve element mounting hole, the first fuel-displaced mistake The top surface suitable for reading with the control valve seat in road connects, and the lower mouth in the first fuel-displaced passageway connects with the bottom surface of the control valve seat It is logical；It is configured with the top surface of the control valve seat and bottom surface and described oil injector body bottom position of positioning hole and quantity identical Transition positioning hole；The head of the control valve element is provided with a circlip groove, and the outline of middle part is from top to bottom followed successively by the second sealed taper Face, the face of cylinder, lower circular conical surface, the first sealing cone of second sealing cone and the control valve seat cooperatively form sealing, Some annular ring recess are provided with the face of cylinder of the control valve element lower end；The second transition oil-feed oil duct, center needle-valve jack, the second oil-feed passageway, the second fuel-displaced passageway are provided with the orifice plate, The second transition oil-feed oil duct is made up of needle-valve passage metering-orifice and transition oil-feed oil hole, wherein the transition oil-feed oil hole Internal diameter be more than the needle-valve passage metering-orifice internal diameter；The second oil-feed passageway from top to bottom successively by oil-feed passageway hole, enter Oil mass hole and oil-feed inclined hole composition, the internal diameter in oil-feed passageway hole be equal to the internal diameter of the oil-feed inclined hole and be all higher than it is described enter The internal diameter in oil mass hole；The second fuel-displaced passageway is from top to bottom made up of fuel-displaced passageway hole, oil spilling metering-orifice, fuel-displaced inclined hole successively, The internal diameter in the fuel-displaced passageway hole is equal to the internal diameter of the fuel-displaced inclined hole and is all higher than the internal diameter of the oil spilling metering-orifice, the oil spilling The internal diameter of metering-orifice is more than the internal diameter of the oil-feed metering-orifice；It is the bottom hole face of the center needle-valve jack and the oil-feed inclined hole, fuel-displaced The bottom hole connection of inclined hole, the aperture of the center needle-valve jack connects with the bottom surface of the orifice plate；The top side configuration of the orifice plate Have and the control valve seat transition position of positioning hole and quantity identical upper Positioning holes and oil holding slot；The bottom surface configuration of the orifice plate There are lower Positioning holes；The upper top side configuration of the needle-valve body has and the orifice plate lower Positioning holes position and quantity identical upper Positioning holes, the pin Needle-valve mounting hole is axially provided with valve body, contains oil pocket, needle-valve blister cavities, by the between the needle-valve mounting hole and needle-valve blister cavities Three sealing cone transition connect；Be additionally provided with the 3rd oil-feed passageway in the needle-valve body, the entrance in the 3rd oil-feed passageway with The top surface connection of the needle-valve body, the outlet in the 3rd oil-feed passageway connect with the Sheng oil pocket；The needle-valve includes the valve stem being made up of the first bar segment, the second bar segment, the 3rd bar segment and positioned at described valve stem one end Needle portion, the valve stem is connected with the needle portion by the 4th sealing cone transition, the 4th sealing cone and institute The 3rd sealing cone for stating needle-valve body cooperatively forms sealing；A valve shoulder face is formed between first bar segment and the second bar segment；Electromagnet component, electromagnet component include electromagnet, electromagnet spring, electromagnet spring washer, armature component, buffering elastic The very tight cap of spring, electromagnetism, O-ring seal, electromagnetism iron washer, wherein armature component are partnered precision-fit by armature and armature lever Couple；O-ring seal groove, regulator bolts mounting hole, armature component mounting hole, electromagnetism iron washer peace are provided with the electromagnet Dress face；Buffer spring mounting surface is provided with the armature.
- 2. it is applied to the high pressure fuel injector of high pressure common rail fuel injection system as claimed in claim 1, it is characterised in that described Oil holding slot is Pear-Shaped oil holding slot.
- 3. it is applied to the high pressure fuel injector of high pressure common rail fuel injection system as claimed in claim 1, it is characterised in that described Second oil-recovery tank is butterfly oil-recovery tank.
- 4. it is applied to the high pressure fuel injector of high pressure common rail fuel injection system as claimed in claim 1, it is characterised in that described The bottom surface of oil injector body is precision machined surface.
- 5. it is applied to the high pressure fuel injector of high pressure common rail fuel injection system as claimed in claim 1, it is characterised in that described The top surface of control valve seat and bottom surface are precision machined surface.
- 6. it is applied to the high pressure fuel injector of high pressure common rail fuel injection system as claimed in claim 1, it is characterised in that described The top surface of orifice plate and bottom surface are precision machined surface.
- 7. it is applied to the high pressure fuel injector of high pressure common rail fuel injection system as claimed in claim 1, it is characterised in that described The upper top surface of needle-valve body is precision machined surface.
- 8. it is applied to the high pressure fuel injector of high pressure common rail fuel injection system as claimed in claim 1, it is characterised in that described The cone angle of second sealing cone of control valve seat is less than the cone angle of the first sealing cone on the control valve seat, in electromagnet During no power, the axial force suffered by high-voltage oil cavity is zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621486220.0U CN207064121U (en) | 2016-12-31 | 2016-12-31 | A kind of high pressure fuel injector applied to high pressure common rail fuel injection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621486220.0U CN207064121U (en) | 2016-12-31 | 2016-12-31 | A kind of high pressure fuel injector applied to high pressure common rail fuel injection system |
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| CN207064121U true CN207064121U (en) | 2018-03-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502879A (en) * | 2020-11-10 | 2021-03-16 | 一汽解放汽车有限公司 | Fuel injection valve |
-
2016
- 2016-12-31 CN CN201621486220.0U patent/CN207064121U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502879A (en) * | 2020-11-10 | 2021-03-16 | 一汽解放汽车有限公司 | Fuel injection valve |
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