CN209586566U - Piston engine compact-type high-pressure fuel injector - Google Patents
Piston engine compact-type high-pressure fuel injector Download PDFInfo
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- CN209586566U CN209586566U CN201822014925.8U CN201822014925U CN209586566U CN 209586566 U CN209586566 U CN 209586566U CN 201822014925 U CN201822014925 U CN 201822014925U CN 209586566 U CN209586566 U CN 209586566U
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Abstract
The utility model discloses piston engine compact-type high-pressure fuel injectors, high pressure fuel connector (4) and low-voltage fuel connector (3) are arranged radially in the axis circumferential direction of oil injector body (1) upper end, electromagnet assembly (14) successively are installed in oil injector body (1), armature spring (25), armature (24), electric-controlled valve seat (13), needle valve spring (12), needle-valve (10), needle seating (11), high pressure fuel connector (4) passes through oil inlet long hole (15) connection valve seat fuel feed hole (26), needle-valve cavity (17) and control cavity (16), it controls cavity (16) and passes through control cavity oil leak hole (27) connection low pressure cavity (30), low-voltage fuel connector (3) passes through oil return long hole (20) connection valve seat oil return hole (21)；Due to same circumferentially high pressure fuel connector (4) and low-voltage fuel connector (3), and piston rod (33) are eliminated, system bulk is small, compact-sized.
Description
Technical field
The utility model relates to high pressure fuel injectors, more particularly to suitable for carrying out fuel oil on diesel oil and kerosene piston engine
The piston engine compact-type high-pressure fuel injector of supply.
Background technique
High pressure fuel injector is one and processes fine, manufacturing process complexity component, and conventional diesel common rail system oil atomizer is logical
Frequently with Fig. 7 to structure type shown in Fig. 10, low-voltage fuel connector 3 is set at the top of 1 upper end of oil injector body, in oil injector body
The tilting high pressure fuel connector 4 in 1 middle and upper part；Along 1 axis of oil injector body by the electromagnet swivel nut 32 that is screwed on oil injector body 1 and
Swivel nut 7 is locked, from top to bottom successively by electromagnet assembly 14, armature spring 25, armature 24, electric-controlled valve seat 13, piston rod 33, needle
Valve spring 12, needle-valve 10,11 equipressure of needle seating are attached in oil injector body 1, and high pressure fuel flows into control by high pressure fuel connector 4
Cavity 16, while needle-valve cavity 17 is flowed by valve seat fuel feed hole 26, oil inlet long hole 15, when electromagnet assembly 14 is connected to outside
When the open command of ECU electronic control unit, when adhesive armature 24 moves upwards after electromagnet assembly 14 is powered, steel ball 41 will leave electricity
The sealing cone of valve seat 13 is controlled, low pressure cavity 30 will be flowed by controlling the high pressure fuel in cavity 16 at this time, be controlled in cavity 16
Fuel pressure will reduce, and piston rod 33 will drive needle-valve 10 to move upwards, and high pressure fuel passes through the high pressure fuel on needle seating 11
Spray orifice outflow, commencement of fuel injection；When external ECU electronic control unit issues open command, electromagnet assembly 14 is powered off, and armature 24 is being held in the mouth
It can be moved downward under the action of 25 compressing force of iron spring, contact is adjacent to the sealing cone of electric-controlled valve seat 13 by steel ball 41, and control is held
Fuel pressure in chamber 16 will be stepped up, and piston rod 33 will drive needle-valve 10 that will move downward and be adjacent to needle seating 11, high compression ignition
Oil cannot be again by the high pressure fuel spray orifice outflow on needle seating 11, and oil spout stops, and completes the entire injection process of injection apparatus.
It above-mentioned conventional high-tension fuel injection equipment (FIE) major defect and is disadvantageous in that:
1) volume is larger.It is arranged obliquely due to using fuel inlet fitting, the fabricated structure that back leakage connection is arranged upwards
Form, it is oversized in the axial direction, it cannot be mounted on the engine equal power device of the restricted requirement in space；
2) number of parts of injector assembly part is more, and system complex, reliability is relatively difficult to guarantee；
3) connection of fuel injector internal oil passages is complicated, and oil circuit is longer, and the cleannes of oil duct are not easy to guarantee, easily leads to fuel injector
Needle-valve clamping stagnation cannot normal Oil injection；
4) it is linked using process for long piston rod and needle-valve, movement parts quality is big, and needle-valve unlatches and closes overlong time, cannot be formed
Stable multi-injection；
5) injector assembly part quality is big, is not able to satisfy the lightweight requirements of engine, vehicle, whole set equipment.
6) structure is complicated for injector assembly part, and the seal interface of fuel oil is more, is easy to produce leakage failure.
Summary of the invention
To solve the above problems existing in the prior art, the utility model provides piston engine compact-type high-pressure oil spout
Device.The piston engine compact-type high-pressure fuel injector of the utility model, including oil injector body 1, it is characterised in that: in the spray
High pressure fuel connector 4 and low-voltage fuel connector 3, the low-voltage fuel are arranged radially in the axis circumferential direction of oily 1 upper end of body
Connector 3 is provided with low-voltage fuel oil return opening 5, successively installs electromagnet assembly 14, rank from top to bottom along 1 axis of oil injector body
Iron spring 25, armature 24, electric-controlled valve seat 13, needle valve spring 12, needle-valve 10, needle seating 11, the armature spring 25 are placed in electricity
In the vestibule of 14 one end of magnet assemblies, the armature 24 is placed in electric-controlled valve seat 13, is provided on the electric-controlled valve seat 13 low
Blind hole is produced at pressure-volume chamber 30,30 bottom of low pressure cavity, and the blind hole mouth produces sealing taper hole 23, and the armature 24 is placed in low
In pressure-volume chamber 30, the sealing convex cone 22 cooperated with sealing taper hole 23 is produced on the armature 24, the needle seating 11 is provided with cavity
In, control cavity 16 is produced at the top of the cavity, the bottom of the cavity is provided with high pressure fuel spray orifice, and the needle-valve 10 is set
In 11 cavity of needle seating, the needle valve spring 12 is sleeved on 10 top of needle-valve and is placed in the control cavity
In 16, locking swivel nut 7 is sleeved on the needle seating 11 and is spirally connected with oil injector body 1, and the locking swivel nut 7 will be successively straight
Needle seating 11, needle-valve 10, needle valve spring 12, electric-controlled valve seat 13, armature 24, armature spring 25, the electromagnet assembly 14 of contact
It overlays together, the high pressure fuel connector 4 is connected to the valve on electric-controlled valve seat 13 by the oil inlet long hole 15 in oil injector body 1
Seat fuel feed hole 26, the valve seat fuel feed hole 26, which is connected to the control in the needle-valve cavity 17 and electric-controlled valve seat 13 in needle seating 11, to be held
Chamber fuel feed hole 28, the control cavity fuel feed hole 28 are connected to the control cavity 16 at 11 top of needle seating, the control cavity
16 are connected to low pressure cavity 30 by the control cavity oil leak hole 27 in electric-controlled valve seat 13, and the low-voltage fuel connector 3 passes through spray
The oil return long hole 20 of oily body 1 is connected to valve seat oil return hole 21；When electromagnet assembly 14 is connected to the unlatching of external ECU electronic control unit
When instruction, when electromagnet assembly 14 is attracted the armature 24 that is mounted in electric-controlled valve seat 13 after being powered and moves upwards, armature 24 it is close
Envelope convex cone 22 will leave the sealing surface of the sealing taper hole 23 of electric-controlled valve seat 13, and controlling the high pressure fuel in cavity 16 at this time will flow into
Low pressure cavity 30, control cavity 16 in high pressure fuel pressure will reduce, low-voltage fuel flow through sealing surface to valve seat oil return hole 21,
Oil return long hole 20, flows out eventually by the low-voltage fuel oil return opening 5 on low-voltage fuel connector 3, the high pressure in needle-valve cavity 17
Fuel oil upwards pressure produced by acting in the groove of 10 lower part of needle-valve higher than the hydraulic coupling and needle valve spring on 10 top of needle-valve
When the resultant force of 12 compressing forces, needle-valve 10 will be moved upwards, and high pressure fuel is opened by the high pressure fuel spray orifice outflow on needle seating 11
Beginning oil spout；When external ECU electronic control unit issues open command, electromagnet assembly 14 is powered off, electromagnet assembly 14 and armature 24
Between electromagnetic attraction disappear, armature 24 moves downward under the action of 25 compressing force of armature spring, and the sealing on armature 24 is convex
Contact is adjacent to the sealing surface of the sealing taper hole 23 on electric-controlled valve seat 13 by cone 22, and high pressure fuel is held by controlling cavity fuel feed hole 28
Continuous to enter control cavity 16, the fuel pressure controlled in cavity 16 increases, when the high pressure fuel in needle-valve cavity 17 acts on needle
It is upwarded pressure produced by the groove of 10 lower part of valve lower than the hydraulic coupling and needle valve spring 12 for controlling cavity 16 at the top of needle-valve 10
When the resultant force of compressing force, needle-valve 10, which moves downward, is adjacent to needle seating 11, and high pressure fuel cannot pass through the high pressure on needle seating 11 again
The outflow of fuel oil spray orifice, oil spout stop, and complete entire injection process.
Further, 1 upper end of oil injector body is provided with socket aperture 2, on the electromagnet assembly 14 with it is outer
The lug plate 9 of portion's harness connector plug connection is arranged in socket aperture 2.
Further, clamping ear mount 6, the endpiece of the clamping ear mount 6 is arranged in the two sides of socket aperture 2 on oil injector body 1
It is provided with the locking wall 29 of back taper.
Further, it is provided with connection control cavity 16 on the electric-controlled valve seat 13 and becomes 16 a part of control cavity
Cavity, the side of the cavity be provided with perforation to armature 24 mounting hole control cavity oil leak hole 27, the mounting hole
Low pressure cavity 30 is formed, the cavity other side is provided with the control cavity fuel feed hole 28 of perforation to valve seat fuel feed hole 26.
Further, the high pressure fuel connector 4, low-voltage fuel connector 3 using be integrated with oil injector body 1, spiral shell
It connects or is interference fitted the mode of being fastenedly connected and be arranged radially at 1 upper end of oil injector body, the low-voltage fuel connector 3 is along oil spout
It is arranged offset in the circumferential direction of 1 axis of body with high pressure fuel connector 4.
Further, frustum porous structure form is installed in the high pressure fuel oil inlet 19 of the high pressure fuel connector 4
Pressure filter 18, several apertures for having both filtering fine impurities and having oily ability are produced on conical filter face, it is described
The spill storing chamber of the frustum root setting depositing contaminants of pressure filter 18.
The piston engine compact-type high-pressure fuel injector of the utility model has following good effect:
It is compact-sized, small in size, installation space is small, system is simple, high reliablity.The utility model is with the work of oil injector body 1
For the assembly installation foundation part of entire high-pressure injection device, high pressure fuel connector 4 directly is arranged radially in 1 upper end of oil injector body
And low-voltage fuel connector 3, while installation minimizes electromagnet assembly 14 and by electric-controlled valve seat 3, armature inside oil injector body 1
24, the direct driving electric controlling valve module that armature spring 25 forms, high-pressure injection apparatus structure is very compact, and axial dimension is significantly
Shorten, small in size, installation space is small, may be mounted on the engine equal power device of the restricted requirement in space；Total member
Number of parts is few, and system is simple, and reliability is easier to guarantee.The high pressure fuel injection device quality of composition is small, can satisfy and starts
Machine, the lightweight of whole set equipment and low burn oil consumption requirement.The utility model structural member oil circuit is shorter, and the cleannes of oil duct are easy to protect
Card.Avoid that prior art high-pressure injection assembly of devices part quality is big, number of parts is more, structure is complicated, reliability is relatively difficult to guarantee
Deficiency, solve the deficiency that prior art injection apparatus is not able to satisfy the lightweight requirements of engine, whole set equipment.
Oil spout open and close response is fast, it is easy to accomplish stable multi-injection.The utility model eliminates the prior art
Shorter high pressure fuel channel can be used in piston rod 33 in this way, when external high pressure oil rail intermediate fuel oil establishes pressure and passes through high pressure
Oil pipe is flow on oil injector body 1 behind 19 position of high pressure fuel oil inlet, and high pressure fuel can be rapidly introduced by oil inlet long hole 15
Needle-valve cavity 17, high-pressure oil duct is shorter, and the time that fuel pressure is established is very fast, high pressure when high pressure fuel injection device works for the first time
Oil is shorter full of required time, can quick oil spout, while fast in injection process mesohigh fuel oil supplement, injection pressure is stablized, oil
It is good to measure consistency, easily realizes stable multi-injection.The utility model uses direct driving electric controlling valve module structure, electrically-controlled valve
Open or close can cause control cavity 16 in fuel pressure variation, promote quickly moving and being formed out up and down for needle-valve 10
It opens, closing motion, shortens unlatching, the shut-in time of fuel injector oil spout；Solve prior art internal high pressure fuel oil oil duct compared with
Long, high pressure volume is big, and needle chamber oil inlet and fuel pressure foundation are slower, and the fuel-injected time started is later, and oil spout is opened, closed
Close low-response, the poor problem of multi-injection oil mass stability.
Plug anti-loosing effect is good, and Electro Magnetic Compatibility is good, and failure rate is low.It is anti-that 1 top of oil injector body is provided with band back taper
The clamping ear mount 6 of loose wall 29 can be by plug jail when the elastic clamping column 47 on exterior strands plug is caught in clamping ear mount 6
Admittedly lock, prevent plug from loosening；When plug exterior is using metal shell and being grounded, and simultaneously in plug metal shell and spray
Between oily body 1 plus when conductive adhesive tape, it can get preferable electromagnetic wave shielding, external electromagnetic interference can be effectively suppressed, while
It can be greatly reduced and itself launch outward electromagnetic wave, not influence the normal work of other periphery electromagnetic devices.Solves the prior art
It is easily loosened using plastic plug and deficiency that anti-electromagnetic radiation ability is poor.
Detailed description of the invention
Fig. 1 is the outline structural diagram of the utility model compact-type high-pressure injection apparatus.
Fig. 2 is the schematic cross-sectional view of Fig. 1.
Fig. 3 is partial enlargement diagram at the I of Fig. 2.
Fig. 4 is the partial schematic sectional view of Fig. 1.
Fig. 5 is partial enlargement diagram at the II of Fig. 4.
Fig. 6 is partial cross section's schematic cross-sectional view of Fig. 1.
Fig. 7 is the outline structural diagram of conventional high-tension fuel injection equipment (FIE).
Fig. 8 is the schematic cross-sectional view of Fig. 7.
Fig. 9 is partial enlargement diagram at the I of Fig. 8.
Figure 10 is partial cross section's schematic cross-sectional view of Fig. 7.
In figure: 1. oil injector bodies, 2. socket apertures, 3. low-voltage fuel connectors, 4. high pressure fuel connectors, 5. low-voltage fuel oil returns
Mouthful, 6. clamping ear mounts, 7. locking swivel nuts, 8. pintle nozzle match-ing parts, 9. lug plates, 10. needle-valves, 11. needle seatings, 12. needle valve springs,
13. electric-controlled valve seat, 14. electromagnet assemblies, 15. oil inlet long holes, 16. control cavities, 17. needle-valve cavities, 18. pressure filters, 19.
High pressure fuel oil inlet, 20. oil return long holes, 21. valve seat oil return holes, 22. sealing convex cones, 23. sealing taper holes, 24. armature, 25.
Armature spring, 26. valve seat fuel feed holes, 27. control cavity oil leak holes, 28. control cavity fuel feed holes, the locking wall of 29. back tapers, 30.
Low pressure cavity, 31. plastic sockets, 32. electromagnet swivel nuts, 33. piston rods, 34. high pressure fuel fuel feed holes, 35. valve rod travel tune
Whole pad, 36. armature circlips, 37. electromagnet sealing rings, 38. damping springs, 39. valve seats are fixed, 40. ball seats, 41. steel balls, and 42.
Adjusting pad, 43. bushings, 44. piston stroke adjusting pads, 45. gaskets, 46. filtering needles, 47. elastic clamping columns.
Specific embodiment
To further illustrate the principles of the present invention and structure, the embodiments of the present invention are carried out now in conjunction with attached drawing
It is described in detail.
Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6 show the piston engine compact-type high-pressure fuel injector of the utility model
Embodiment, piston engine compact-type high-pressure fuel injector, including oil injector body 1, it is characterised in that: in the oil injector body
High pressure fuel connector 4 and low-voltage fuel connector 3 are arranged radially in the axis circumferential direction of 1 upper end, the low-voltage fuel connector 3 is opened
There is low-voltage fuel oil return opening 5, electromagnet assembly 14, armature spring are successively installed from top to bottom along 1 axis of oil injector body
25, armature 24, electric-controlled valve seat 13, needle valve spring 12, needle-valve 10, needle seating 11, the armature spring 25 are placed in electromagnet group
In the vestibule of 14 one end of part, the armature 24 is placed in electric-controlled valve seat 13, is provided with low pressure cavity on the electric-controlled valve seat 13
30, blind hole is produced at 30 bottom of low pressure cavity, and the blind hole mouth produces sealing taper hole 23, and the armature 24 is placed in low pressure cavity
In 30, the sealing convex cone 22 cooperated with sealing taper hole 23 is produced on the armature 24, the needle seating 11 is provided in cavity, described
Control cavity 16 is produced at the top of cavity, the bottom of the cavity is provided with high pressure fuel spray orifice, and the needle-valve 10 is placed in described
In 11 cavity of needle seating, the needle valve spring 12 is sleeved on 10 top of needle-valve and is placed in the control cavity 16,
Locking swivel nut 7 is sleeved on the needle seating 11 and is spirally connected with oil injector body 1, and the locking swivel nut 7 successively will directly connect
Needle seating 11, needle-valve 10, needle valve spring 12, electric-controlled valve seat 13, armature 24, armature spring 25, the electromagnet assembly 14 of touching overlay
Together, the high pressure fuel connector 4 by the oil inlet long hole 15 in oil injector body 1 be connected to the valve seat on electric-controlled valve seat 13 into
Oilhole 26, the valve seat fuel feed hole 26 be connected to the control cavity in the needle-valve cavity 17 and electric-controlled valve seat 13 in needle seating 11 into
Oilhole 28, the control cavity fuel feed hole 28 are connected to the control cavity 16 at 11 top of needle seating, and the control cavity 16 is logical
The control cavity oil leak hole 27 crossed in electric-controlled valve seat 13 is connected to low pressure cavity 30, and the low-voltage fuel connector 3 passes through fuel injector
The oil return long hole 20 of body 1 is connected to valve seat oil return hole 21；When electromagnet assembly 14 is connected to the open command of external ECU electronic control unit
When, when the armature 24 that actuation is mounted in electric-controlled valve seat 13 after electromagnet assembly 14 is powered moves upwards, the sealing of armature 24 is convex
Cone 22 will leave the sealing surface of the sealing taper hole 23 of electric-controlled valve seat 13, and the high pressure fuel controlled in cavity 16 at this time will flow into low pressure
Cavity 30, controlling the high pressure fuel pressure in cavity 16 will reduce, and low-voltage fuel flows through sealing surface to valve seat oil return hole 21, oil return
Long hole 20, flows out eventually by the low-voltage fuel oil return opening 5 on low-voltage fuel connector 3, the high pressure fuel in needle-valve cavity 17
It is upwarded pressure produced by acting in the groove of 10 lower part of needle-valve higher than hydraulic coupling and needle valve spring 12 pressure on 10 top of needle-valve
When the resultant force of contracting power, needle-valve 10 will be moved upwards, and high pressure fuel starts to spray by the high pressure fuel spray orifice outflow on needle seating 11
Oil；When external ECU electronic control unit issues open command, electromagnet assembly 14 is powered off, between electromagnet assembly 14 and armature 24
Electromagnetic attraction disappear, armature 24 moves downward under the action of 25 compressing force of armature spring, the sealing convex cone 22 on armature 24
Will contact be adjacent on electric-controlled valve seat 13 sealing taper hole 23 sealing surface, high pressure fuel by control cavity fuel feed hole 28 continue into
Enter to control cavity 16, the fuel pressure controlled in cavity 16 increases, when the high pressure fuel in needle-valve cavity 17 acts on needle-valve 10
It upwards pressure produced by the groove of lower part and is compressed lower than the hydraulic coupling and needle valve spring 12 for controlling cavity 16 at the top of needle-valve 10
When the resultant force of power, needle-valve 10, which moves downward, is adjacent to needle seating 11, and high pressure fuel cannot pass through the high pressure fuel on needle seating 11 again
Spray orifice outflow, oil spout stop, and complete entire injection process.
Further, 1 inner cavity of oil injector body is equipped with the electromagnet assembly 14 of elongated shape, the setting of 1 upper end of oil injector body
There is socket aperture 2, the lug plate 9 of 14 upper end of electromagnet assembly exposes in socket aperture 2, lug plate 9 and exterior strands plug
After inserted sheet connection, electromagnet assembly 14 is connected with external circuit；The two sides of socket aperture 2 are provided with clamping on oil injector body 1
Ear mount 6, the endpiece of clamping ear mount 6 are provided with the locking wall 29 of back taper, when the elastic clamping column on exterior strands plug is caught in
When boring locking wall 29, plug can be securely locked, prevent plug from loosening；When plug exterior using metal shell and connects
Ground, and simultaneously between plug metal shell and oil injector body 1 plus when conductive adhesive tape, it can get preferable electromagnetic wave shielding, it can
Effectively inhibit external electromagnetic interference, while can also be greatly reduced and itself launch outward electromagnetic wave, does not influence other periphery electromagnetic devices
The normal work of part.
Further, it is provided with connection control cavity 16 on the electric-controlled valve seat 13 and becomes 16 a part of control cavity
Cavity, the side of the cavity be provided with perforation to armature 24 mounting hole control cavity oil leak hole 27, the mounting hole
Low pressure cavity 30 is formed, the cavity other side is provided with the control cavity fuel feed hole 28 of perforation to valve seat fuel feed hole 26.
Further, the high pressure fuel connector 4, low-voltage fuel connector 3 using be integrated with oil injector body 1, spiral shell
It connects or is interference fitted the mode of being fastenedly connected and be arranged radially at 1 upper end of oil injector body, the low-voltage fuel connector 3 is along oil spout
It is arranged offset in the circumferential direction of 1 axis of body with high pressure fuel connector 4.
Further, frustum porous structure form is installed in the high pressure fuel oil inlet 19 of the high pressure fuel connector 4
Pressure filter 18, several apertures for having both filtering fine impurities and having oily ability are produced on conical filter face, it is described
The spill storing chamber of the frustum root setting depositing contaminants of pressure filter 18.
The above, only the utility model preferred embodiment, therefore the utility model implementation cannot be limited with this
Range should still belong to this reality that is, according to equivalent changes and modifications made by present utility model application the scope of the patents and description
In the range of being covered with new patent.
Claims (6)
1. piston engine compact-type high-pressure fuel injector, including oil injector body (1), it is characterised in that: in the oil injector body
(1) high pressure fuel connector (4) and low-voltage fuel connector (3), the low-voltage fuel are arranged radially in the axis circumferential direction of upper end
Connector (3) is provided with low-voltage fuel oil return opening (5), successively installs electromagnet group from top to bottom along described oil injector body (1) axis
Part (14), armature spring (25), armature (24), electric-controlled valve seat (13), needle valve spring (12), needle-valve (10), needle seating (11), institute
The armature spring (25) stated is placed in the vestibule of electromagnet assembly (14) one end, and the armature (24) is placed in electric-controlled valve seat (13)
In, it is provided on the electric-controlled valve seat (13) low pressure cavity (30), blind hole, the blind hole are produced in described low pressure cavity (30) bottom
Mouth produces sealing taper hole (23), and the armature (24) be placed in low pressure cavity (30), produces on the armature (24) and sealed taper
The sealing convex cone (22) of hole (23) cooperation, the needle seating (11) are provided in cavity, and control cavity is produced at the top of the cavity
(16), the bottom of the cavity is provided with high pressure fuel spray orifice, and the needle-valve (10) is placed in the needle seating (11) cavity, institute
The needle valve spring (12) stated is sleeved on described needle-valve (10) top and is placed in the control cavity (16), locks swivel nut (7)
It is sleeved on the needle seating (11) and is spirally connected with oil injector body (1), the locking swivel nut (7) is by what is successively directly contacted
Needle seating (11), needle-valve (10), needle valve spring (12), electric-controlled valve seat (13), armature (24), armature spring (25), electromagnet group
Part (14) overlays together, and the high pressure fuel connector (4) is connected to automatically controlled by the oil inlet long hole (15) in oil injector body (1)
Valve seat fuel feed hole (26) on valve seat (13), the valve seat fuel feed hole (26) are connected to the needle-valve cavity (17) in needle seating (11)
With the control cavity fuel feed hole (28) in electric-controlled valve seat (13), control cavity fuel feed hole (28) connection needle seating (11) top
The control cavity (16) in portion, the control cavity (16) pass through control cavity oil leak hole (27) connection in electric-controlled valve seat (13)
Low pressure cavity (30), the low-voltage fuel connector (3) are connected to valve seat oil return hole by the oil return long hole (20) of oil injector body (1)
(21)。
2. piston engine compact-type high-pressure fuel injector according to claim 1, it is characterised in that: in the electrically-controlled valve
It is provided with connection control cavity (16) on seat (13) and becomes the cavity of control cavity (16) a part, the side of the cavity is provided with
It penetrates through to the control cavity oil leak hole (27) of the mounting hole of armature (24), the mounting hole forms low pressure cavity (30), described
The cavity other side be provided with perforation to valve seat fuel feed hole (26) control cavity fuel feed hole (28).
3. piston engine compact-type high-pressure fuel injector according to claim 2, it is characterised in that: the oil injector body
(1) upper end is provided with socket aperture (2), the lug plate connecting with exterior strands plug on the electromagnet assembly (14)
(9) it is arranged in socket aperture (2).
4. piston engine compact-type high-pressure fuel injector according to claim 3, it is characterised in that: in oil injector body (1)
Clamping ear mount (6) are arranged in the two sides of upper socket aperture (2), and the endpiece of the clamping ear mount (6) is provided with the locking wall of back taper (29).
5. according to claim 1, the described in any item piston engine compact-type high-pressure fuel injectors in 2,3 or 4, it is characterised in that:
The high pressure fuel connector (4), low-voltage fuel connector (3) with oil injector body (1) using being integrated, be spirally connected or interference is matched
Conjunction is fastenedly connected mode and is arranged radially at oil injector body (1) upper end, and the low-voltage fuel connector (3) is along oil injector body
(1) it is arranged offset in the circumferential direction of axis with high pressure fuel connector (4).
6. piston engine compact-type high-pressure fuel injector according to claim 5, it is characterised in that: the high pressure fuel
The pressure filter (18) of frustum porous structure form, conical filter face are installed in the high pressure fuel oil inlet (19) of connector (4)
On produce several apertures for having both filtering fine impurities and having oily ability, the frustum root of the pressure filter (18) is set
Set the spill storing chamber of depositing contaminants.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822014925.8U CN209586566U (en) | 2018-12-03 | 2018-12-03 | Piston engine compact-type high-pressure fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822014925.8U CN209586566U (en) | 2018-12-03 | 2018-12-03 | Piston engine compact-type high-pressure fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209586566U true CN209586566U (en) | 2019-11-05 |
Family
ID=68349433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822014925.8U Active CN209586566U (en) | 2018-12-03 | 2018-12-03 | Piston engine compact-type high-pressure fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209586566U (en) |
-
2018
- 2018-12-03 CN CN201822014925.8U patent/CN209586566U/en active Active
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