CN219587685U - Control valve of electric control common rail fuel injector - Google Patents
Control valve of electric control common rail fuel injector Download PDFInfo
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- CN219587685U CN219587685U CN202321279052.8U CN202321279052U CN219587685U CN 219587685 U CN219587685 U CN 219587685U CN 202321279052 U CN202321279052 U CN 202321279052U CN 219587685 U CN219587685 U CN 219587685U
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- valve
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- oil
- sprayer
- armature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Fuel-Injection Apparatus (AREA)
Abstract
The utility model belongs to the technical field of control valves, in particular to an electric control common rail fuel injector control valve, which comprises a fuel injector, wherein two groups of electromagnetic valves are symmetrically arranged in a valve control chamber, a steel ball is arranged at an oil return orifice, a connecting block is welded at the top end of the steel ball, a connecting rod is welded at the top end of the connecting block, an armature is welded at the top end of the connecting rod, a valve spring is welded at the top end of the armature, the top end of the valve spring is fixedly connected to a top plate of the inner wall of the valve control chamber, a fixed block is welded on the inner wall of the valve control chamber, a positioning plate is welded on the fixed block, a buffer spring is fixedly arranged between the positioning plate and the armature, the connecting rod is driven to move in the positioning plate when the armature moves downwards through the up and down movement of the armature, the downward impact force generated when the steel ball is seated is effectively reduced through the installation of the buffer spring, the damage to parts in the fuel injector caused by the impact force is avoided, and the service life of the device is prolonged.
Description
Technical Field
The utility model relates to the technical field of control valves, in particular to an electric control common rail fuel injector control valve.
Background
The electronic control common rail fuel injection system is a main development direction of the current diesel engine fuel injection system, and the electronic control common rail fuel injector is a core key component of the electronic control common rail fuel injection system, and a control valve is needed to be used for fuel injection control in the electronic control common rail fuel injector.
The control valve consists of a solenoid valve, an armature, a piston and other structures, and the movement of the armature is controlled through the solenoid valve so as to control the change of the fuel pressure in the valve cavity, thereby controlling the stress of the up-down pressure difference on the piston and realizing the opening and closing of the fuel spray nozzle.
Because the armature assembly in the control valve is not provided with a protection structure, downward impact force generated when the steel ball is seated can damage parts in the oil sprayer, so that the service life of the oil sprayer is reduced; therefore, an electronically controlled common rail injector control valve is proposed for the above-mentioned problems.
Disclosure of Invention
In order to make up the defects of the prior art and solve the problems existing in the prior art, the utility model provides an electric control common rail fuel injector control valve.
The technical scheme adopted for solving the technical problems is as follows: the utility model discloses an electric control common rail oil sprayer control valve, which comprises an oil sprayer, wherein an oil spray nozzle is arranged at the bottom end of the oil sprayer, a high-pressure connecting pipe is arranged on the side wall of the oil sprayer, an oil inlet channel and an oil inlet orifice are formed in the oil sprayer, the oil inlet channel and the oil inlet orifice are connected with the high-pressure connecting pipe, a valve control chamber is formed in the upper end of the oil sprayer, an oil return orifice is formed at the bottom end of the valve control chamber, a backflow hole is formed at the top end of the valve control chamber, two groups of electromagnetic valves are symmetrically arranged in the valve control chamber, steel balls are arranged at the oil return orifices, a connecting block is welded at the top end of the steel balls, a connecting rod is welded at the top end of the connecting rod, an armature is welded at the top end of the armature, a valve spring is fixedly connected to a top plate of the inner wall of the valve control chamber, a fixed block is welded on the inner wall of the valve control chamber, a positioning plate is welded in the fixed block, a through hole is formed in the positioning plate, the connecting rod penetrates through the through hole, a buffer spring is fixedly arranged between the positioning plate and the armature, and the buffer spring is arranged in the position between the positioning plate, and the armature moves up and down, so that the impact force generated by the armature moves in the valve control chamber when the positioning plate moves down, and the connecting rod is reduced, and the impact force generated on the oil sprayer is effectively when the device is located in the position and is reduced.
Preferably, a moving groove is formed below the inner part of the oil sprayer, a piston is assembled in the moving groove, and the piston is pushed to move in the moving groove through pressure difference between the valve control chamber and the inner cavity of the oil sprayer, so that the needle valve is beneficial to quickly opening the oil sprayer.
Preferably, the sliding chamber has been seted up to the shifting chute below, the piston bottom is located the sliding chamber, the welding has the mounting panel on the piston diapire, the welding has the glib spring on the mounting panel, glib spring top welding is on the sliding chamber inner wall roof, glib spring cover is established at the piston periphery, promotes the piston downwards through the thrust of glib spring, and the piston drives the needle valve and closes the fuel sprayer, is favorable to closing the fuel sprayer fast.
Preferably, the sliding tray has been seted up to sliding chamber below, it has the needle valve to run through in the sliding tray, the needle valve welding is in the mounting panel bottom, the needle valve is located the fuel sprayer department, the pressure accumulation room has been seted up to the inside fuel sprayer periphery that is located the fuel sprayer, through adding and establishing the pressure accumulation room to ensure that the oil mass is sufficient when letting in, be of value to the intracavity pressure stability when stopping letting in.
The utility model has the advantages that:
1. according to the utility model, the connecting rod is carried to move in the positioning plate when the armature moves up and down, and the buffer spring is arranged when the armature moves down, so that the downward impact force generated when the steel ball is seated is effectively reduced, the damage of the impact force to parts in the oil sprayer is avoided, the service life of the device is prolonged, and the piston is pushed to move in the moving groove by the pressure difference between the valve control chamber and the inner cavity of the oil sprayer, so that the needle valve is beneficial to quickly opening the oil sprayer.
2. According to the utility model, the piston is pushed downwards by the thrust of the oil nozzle spring, the piston drives the needle valve to close the oil nozzle, the object rapidly closes the oil nozzle, and the pressure accumulation chamber is additionally arranged, so that the oil quantity is sufficient during oil feeding, and the pressure stability in the cavity is beneficial to stopping oil feeding.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic perspective view of a first view;
FIG. 2 is a schematic view of the internal three-dimensional structure of a fuel injector;
FIG. 3 is a schematic view of the internal perspective of the valve control chamber;
fig. 4 is a schematic perspective view of the piston.
In the figure: 1. an oil injector; 2. an oil nozzle; 3. a high pressure connection pipe; 4. an oil inlet passage; 5. an oil inlet orifice; 6. a valve control chamber; 7. an oil return orifice; 8. a reflow hole; 9. an electromagnetic valve; 10. a steel ball; 11. a connecting block; 12. a connecting rod; 13. an armature; 14. a valve spring; 15. a fixed block; 16. a positioning plate; 17. a buffer spring; 18. a moving groove; 19. a piston; 20. a sliding chamber; 21. a mounting plate; 22. a nipple spring; 23. a sliding groove; 24. a needle valve; 25. and a pressure accumulation chamber.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-3, an electrically controlled common rail injector control valve comprises an injector 1, an oil nozzle 2 is arranged at the bottom end of the injector 1, a high-pressure connecting pipe 3 is arranged on the side wall of the injector 1, an oil inlet channel 4 and an oil inlet orifice 5 are formed in the injector 1, the oil inlet channel 4 and the oil inlet orifice 5 are connected with the high-pressure connecting pipe 3, a valve control chamber 6 is formed in the upper end of the injector 1, an oil return orifice 7 is formed at the bottom end of the valve control chamber 6, a return hole 8 is formed at the top end of the valve control chamber 6, two groups of electromagnetic valves 9 are symmetrically arranged in the valve control chamber 6, a steel ball 10 is arranged at the oil return orifice 7, a connecting block 11 is welded at the top end of the steel ball 10, a connecting rod 12 is welded at the top end of the connecting block 11, an armature 13 is welded at the top end of the connecting rod 12, a valve spring 14 is welded at the top end of the armature 13, a fixed block 15 is welded on the inner wall top plate of the valve spring 14, a fixed block 15 is welded on the inner wall of the valve control chamber 6, a positioning plate 16 is welded on the inner wall of the fixed block 15, a through hole is formed in the positioning plate 16, a connecting rod 12 penetrates through the through hole, and a buffer spring 17 is fixedly arranged between the positioning plate 16 and the armature 13; during operation, because no protection structure exists in the armature assembly, downward impact force generated when the steel ball 10 is seated can damage parts in the oil sprayer 1, the service life of the oil sprayer is reduced, fuel is sent to the oil sprayer 1 from the high-pressure connecting pipe 3 through the oil inlet channel 4 and enters the valve control chamber 6 through the oil inlet channel 4, the electromagnetic valve 9 is electrified, the attraction force of a coil on the electromagnetic valve 9 is larger than the force of the valve spring 14, the electromagnetic valve 9 sucks the armature 13, the steel ball 10 is lifted, the oil return throttle hole 7 is opened, when the oil sprayer 1 is closed, the electromagnetic valve 9 finishes controlling current, the armature 13 downwards presses the steel ball 10 on the valve seat under the action of the valve spring 14, the oil return throttle hole 7 is closed, the connecting rod 12 moves in the positioning plate 16 when the armature 13 moves up and down, the impact force generated when the steel ball 10 is effectively reduced through the installation of the buffer spring 17, the damage to parts in the oil sprayer 1 caused by the impact force is avoided, and the service life of a device is favorably improved.
Referring to fig. 4, a moving groove 18 is formed below the inner portion of the injector 1, a piston 19 is assembled in the moving groove 18, a sliding cavity 20 is formed below the moving groove 18, the bottom end of the piston 19 is located in the sliding cavity 20, a mounting plate 21 is welded on the bottom wall of the piston 19, an oil nozzle spring 22 is welded on the mounting plate 21, the top end of the oil nozzle spring 22 is welded on the top plate of the inner wall of the sliding cavity 20, the oil nozzle spring 22 is sleeved on the periphery of the piston 19, a sliding groove 23 is formed below the sliding cavity 20, a needle valve 24 penetrates through the sliding groove 23, the needle valve 24 is welded at the bottom end of the mounting plate 21, the needle valve 24 is located at the oil nozzle 2, and an accumulator 25 is formed on the periphery of the oil nozzle 2 inside the injector 1; during operation, because the oil injector is not provided with a large oil storage space, the internal oil supply quantity is insufficient, the pressure in the cavity is insufficient, the electromagnetic valve 9 is electrified, the oil return throttle hole 7 is opened, the fuel flows into the valve control chamber 6 and returns to the oil tank through the backflow hole 8, the pressure in the valve control chamber 6 is reduced, the oil inlet throttle hole 5 can prevent the pressure from being completely balanced, the pressure in the valve control chamber 6 is smaller than the pressure in the inner cavity volume of the oil nozzle 2 at the moment, the needle valve 24 is opened, the oil injection is started, and the pressure accumulation chamber 25 is additionally arranged, so that the sufficient oil quantity during oil supply is ensured, and the pressure in the cavity is stable during oil supply stopping.
In principle, as the armature assembly has no protective structure, the steel ball 10 can generate downward impact force when being seated, the impact force may cause damage to components inside the fuel injector 1, resulting in a reduced service life of the fuel injector, the fuel is sent to the fuel injector 1 from the high-pressure connecting pipe 3 through the fuel inlet channel 4, and enters the valve control chamber 6 through the fuel inlet channel 4, the electromagnetic valve 9 is electrified, the attraction force of a coil on the electromagnetic valve 9 is larger than the force of the valve spring 14, the electromagnetic valve 9 sucks the armature 13, the steel ball 10 is lifted, the oil return throttle hole 7 is opened, when the fuel injector 1 is closed, the electromagnetic valve 9 controls the current to be ended, the armature 13 presses the ball 10 downwards against the valve seat under the force of the valve spring 14, the oil return orifice 7 is closed, by installing the positioning plate 16, the armature 13 moves in the positioning plate 16 with the connecting rod 12 when moving up and down, and when the armature 13 moves down, by installing the buffer spring 17, the downward impact force generated when the steel ball 10 is seated is effectively reduced, the damage of the impact force to the parts inside the oil sprayer 1 is avoided, the service life of the device is prolonged, because the oil sprayer is not provided with a larger oil storage space, the internal oil-passing quantity is insufficient, the pressure in the cavity is insufficient, the oil return throttle hole 7 is opened by energizing the electromagnetic valve 9, the fuel flows into the valve control chamber 6 and returns to the oil tank through the return hole 8, the pressure in the valve control chamber 6 is reduced, while the oil inlet orifice 5 prevents the pressure from being completely balanced, the pressure in the valve control chamber 6 is now less than the pressure in the inner chamber volume of the oil jet 2, the needle valve 24 is opened to start oil injection, and the pressure accumulating chamber 25 is additionally arranged to ensure sufficient oil quantity during oil feeding, so that the pressure in the cavity is stable during oil feeding stopping.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.
Claims (6)
1. The utility model provides an automatically controlled common rail fuel sprayer control valve, includes sprayer (1), sprayer (1) bottom is provided with fuel sprayer (2), install high-pressure connecting pipe (3) on sprayer (1) lateral wall, inside oil feed passageway (4) and the oil feed orifice (5) of having seted up of sprayer (1), oil feed passageway (4) and oil feed orifice (5) link to each other with high-pressure connecting pipe (3), valve control room (6) are seted up to sprayer (1) upper end inside, return orifice (7) are seted up to valve control room (6) bottom, return orifice (8) are seted up on valve control room (6) top, two sets of solenoid valves (9) are installed to valve control room (6) internal symmetry, return orifice (7) department is provided with steel ball (10), connecting block (11) are welded on steel ball (10) top, connecting block (11) top welding has connecting rod (12), armature (13) are welded on connecting rod (12) top, armature (13) top, valve control room (14) top has valve control room (6) top, valve control room (14) are welded on roof fixed on the roof, valve control room (15), the positioning plate (16) is welded on the fixed block (15), a through hole is formed in the positioning plate (16), the connecting rod (12) penetrates through the through hole, and a buffer spring (17) is fixedly arranged between the positioning plate (16) and the armature (13).
2. An electrically controlled common rail injector control valve as in claim 1, wherein: a moving groove (18) is formed in the lower portion of the inner portion of the oil sprayer (1), and a piston (19) is assembled in the moving groove (18).
3. An electrically controlled common rail injector control valve as in claim 2, wherein: a sliding cavity (20) is formed below the moving groove (18), and the bottom end of the piston (19) is located in the sliding cavity (20).
4. An electrically controlled common rail injector control valve as in claim 2, wherein: the oil nozzle is characterized in that an installation plate (21) is welded on the bottom wall of the piston (19), an oil nozzle spring (22) is welded on the installation plate (21), the top end of the oil nozzle spring (22) is welded on the top plate of the inner wall of the sliding cavity (20), and the oil nozzle spring (22) is sleeved on the periphery of the piston (19).
5. An electrically controlled common rail injector control valve as in claim 3, wherein: a sliding groove (23) is formed below the sliding cavity (20), a needle valve (24) penetrates through the sliding groove (23), and the needle valve (24) is welded at the bottom end of the mounting plate (21).
6. The electrically controlled common rail injector control valve of claim 5, wherein: the needle valve (24) is positioned at the oil nozzle (2), and the pressure accumulation chamber (25) is arranged inside the oil sprayer (1) and at the periphery of the oil nozzle (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321279052.8U CN219587685U (en) | 2023-05-24 | 2023-05-24 | Control valve of electric control common rail fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321279052.8U CN219587685U (en) | 2023-05-24 | 2023-05-24 | Control valve of electric control common rail fuel injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219587685U true CN219587685U (en) | 2023-08-25 |
Family
ID=87699068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321279052.8U Active CN219587685U (en) | 2023-05-24 | 2023-05-24 | Control valve of electric control common rail fuel injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219587685U (en) |
-
2023
- 2023-05-24 CN CN202321279052.8U patent/CN219587685U/en active Active
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