CN114635819A - High-pressure common rail oil injector high-speed electromagnetic valve capable of realizing stable multiple injection - Google Patents
High-pressure common rail oil injector high-speed electromagnetic valve capable of realizing stable multiple injection Download PDFInfo
- Publication number
- CN114635819A CN114635819A CN202210226446.0A CN202210226446A CN114635819A CN 114635819 A CN114635819 A CN 114635819A CN 202210226446 A CN202210226446 A CN 202210226446A CN 114635819 A CN114635819 A CN 114635819A
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- China
- Prior art keywords
- armature
- valve
- valve rod
- common rail
- electromagnetic valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
- F02M63/0021—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures
- F02M63/0022—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures the armature and the valve being allowed to move relatively to each other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention aims to provide a high-speed electromagnetic valve of a high-pressure common rail oil sprayer for realizing stable multiple injection, which comprises a shell, an iron core, an armature, a valve rod and a valve seat, wherein a fastening nut is arranged above the shell, a solenoid valve reset spring seat is arranged in the middle of the fastening nut, the iron core is arranged in the shell, a coil is wound in a groove of the iron core, a middle through hole is arranged in the middle of the iron core, a solenoid valve reset spring is arranged in the middle through hole, the armature and the valve seat are sequentially arranged below the iron core, the top of the valve rod is arranged in the armature through a valve rod fastening nut, the bottom of the valve rod is positioned in the through hole of the valve seat, the solenoid valve reset spring seat and the valve rod fastening nut are respectively arranged at two ends of the solenoid valve reset spring, a buffer spring is sleeved on the valve rod between the armature and the valve seat, and an oil return way is arranged in the valve rod. The invention solves the problem that the armature iron of the existing high-speed electromagnetic valve is not completely rebounded and seated under the condition of multiple injections, and improves the stability of oil injection of the common rail oil injector.
Description
Technical Field
The invention relates to a diesel engine, in particular to a high-pressure common rail device of the diesel engine.
Background
The high-speed electromagnetic valve is a core control component of the high-pressure common rail oil sprayer, and the dynamic response characteristics of the high-speed electromagnetic valve directly influence the accurate control of the high-pressure common rail oil sprayer on the circulating oil injection quantity, the oil injection rule and the oil injection time, particularly for a multi-injection strategy. Therefore, high dynamic response characteristics are one of the main indexes for measuring the performance of the high-speed solenoid valve, and short opening and closing time is required in a high-pressure common rail system, and the high-speed solenoid valve is required to be opened stably and closed thoroughly.
In order to achieve fast opening of the high-speed solenoid valve, high voltage is usually used to achieve fast rise of electromagnetic force in the opening stage of the solenoid valve, so as to achieve fast opening of the solenoid valve. When the solenoid valve was opened fast, the ascending speed of armature was great, and this can lead to armature to strike with the stop device of great speed and iron core, and the reaction force that the striking produced easily makes armature take place the bounce-back, and under this condition, high-speed solenoid valve can appear opening the back part and close, and this causes the unstability of high pressure common rail fuel injector oil spout. The quick closing of the high-speed electromagnetic valve is realized through the large spring pretightening force loaded on the armature, the armature is quickly seated after the electromagnetic valve is powered off, due to the effect of the large spring pretightening force, the armature possibly forms large impact force in the moment of seating, the impact force enables the armature to rebound when seated, and seating is completed after multiple rebounds, so that the high-speed electromagnetic valve is not completely closed, stable oil injection of the common rail oil injector is greatly deteriorated, and the high-pressure common rail system cannot realize multiple injection or has poor stability of oil injection under multiple injection.
Disclosure of Invention
The invention aims to provide a high-speed electromagnetic valve of a high-pressure common rail oil sprayer, which can solve the problem that the armature iron of the conventional high-speed electromagnetic valve does not bounce and sit thoroughly under multiple injections and improve the oil injection stability of the common rail oil sprayer.
The purpose of the invention is realized as follows:
the invention relates to a high-speed electromagnetic valve of a high-pressure common rail oil sprayer for realizing stable multiple injection, which is characterized in that: the novel electromagnetic valve comprises a housin, the iron core, armature, the valve rod, the disk seat, fastening nut is installed to the casing top, fastening nut middle part sets up the solenoid valve spring holder that resets, the iron core is installed in the casing, winding coil in the recess of iron core, the middle part of iron core sets up middle through-hole, install solenoid valve reset spring in the middle through-hole, the iron core below sets gradually armature, the disk seat, valve rod fastening nut is passed through at the top of valve rod and is installed in armature, the bottom of valve rod is located the through-hole of disk seat, solenoid valve reset spring's both ends are solenoid valve spring holder and valve rod fastening nut respectively, the valve rod cover between armature and the disk seat has buffer spring, set up the oil return circuit in the valve rod.
The present invention may further comprise:
1. a fixed gasket is arranged on the inner wall of the cavity of the shell where the armature is located, and a buffering and adjusting gasket is arranged between the fixed gasket and the shell as well as between the fixed gasket and the iron core.
2. The inner diameter of the buffering adjusting gasket is smaller than the inner diameter of the fixed gasket and larger than the outer diameter of the armature, and a rising throttling damping gap of 0.004-0.006mm is formed between the buffering adjusting gasket and the outer edge of the armature.
3. The height of the lower end of the buffer adjusting gasket is 80% of the total lifting stroke of the armature.
4. And a buffer adjusting ring belt is arranged below the valve seat.
5. The inner diameter of the buffering adjusting ring belt is larger than the outer diameter of the valve rod, and a seating throttling damping gap of 0.005-0.007mm is formed between the inner diameter of the buffering adjusting ring belt and the outer edge of the lower end of the valve rod.
6. The height of the upper end of the buffer adjusting ring belt is 80% of the total seating stroke of the armature.
7. Four arc tangent planes are arranged on the outer edge of the armature.
8. Four vertical tangent planes are arranged on the outer edge of the lower end of the valve rod.
The invention has the advantages that:
1. when the armature rises when the coil is electrified and the height of the lower end of the buffer adjusting gasket is level, the outer edge of the armature and the buffer adjusting gasket generate a throttling damping effect, so that the impact iron rebound of the armature and the iron core is reduced, and the stable opening of the high-speed electromagnetic valve is realized;
2. in the coil power-off armature seating process, when the height of the armature is flush with the upper end of the buffer adjusting ring band, the outer edge of the lower end of the armature valve rod and the buffer adjusting ring band generate throttling damping, the seating stability of the electromagnetic valve is improved, the high-speed electromagnetic valve is stably closed, and the oil injection stability of the high-pressure common rail oil injector is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the armature;
FIG. 3 is a bottom view of the valve stem;
FIG. 4 is a schematic view of a throttle damping gap between the armature and the cushion adjusting shim;
FIG. 5 is a schematic view of the throttle damping gap between the valve rod and the damping adjusting ring.
Detailed Description
The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of the present invention, which comprises a housing 1, a fastening nut 2, a solenoid valve return spring seat 3, a solenoid valve return spring 4, an iron core 5, a coil 6, a fixed gasket 7, a buffer adjusting gasket 8, an armature 9, an armature valve rod 10, a valve rod fastening nut 11, a buffer spring 12, a valve seat 13, and a buffer adjusting ring 14, wherein the coil 6 is installed in a groove of the iron core 5, the solenoid valve return spring 4 is installed in a middle through hole, one end of the solenoid valve return spring 4 is fixed on the solenoid valve return spring seat 3, the other end of the solenoid valve return spring is supported by the upper end of the armature 9, the upper end of the armature valve rod 10 is connected with the armature 9 through the armature fastening nut 11, an oil return path is opened in the middle of the armature valve rod 10, the buffer spring 12 is sleeved on the upper end of the armature valve rod 10 and is arranged between the armature 9 and the valve seat 13, the outer edge of the armature 9 is provided with four arc-shaped cross sections, the buffer adjusting gasket 8 is arranged between the fixed gasket 7 and the iron core 5, the outer edge of the lower end of the valve rod 10 is provided with four vertical sections, the valve seat 13 is provided with a through hole, the inner diameter of the through hole is larger than the outer diameter of the valve rod 10, and a buffer adjusting ring belt 14 is arranged below the valve seat 13. The inner diameter of the buffering adjusting gasket 8 is smaller than the inner diameter of the fixed gasket 7 and larger than the outer diameter of the armature 9, a rising throttling damping gap 15 of 0.004-0.006mm is formed with the outer edge of the armature 9, the inner diameter of the buffering adjusting ring belt 14 is larger than the outer diameter of the valve rod 10, and a seating throttling damping gap 16 of 0.005-0.007mm is formed with the outer edge of the lower end of the valve rod 10. The height of the lower end of the buffer adjusting gasket 8 is lower than the maximum displacement position of the armature 9, the height of the lower end of the buffer adjusting gasket 8 is positioned at 80% of the total ascending stroke of the armature 9, the height of the upper end of the buffer adjusting ring belt 14 is higher than the initial position of the lower end of the valve rod 10, and the height of the upper end of the buffer adjusting ring belt 14 is positioned at 80% of the total seating stroke of the armature 9.
With reference to fig. 2 to 5, the operating principle of the present invention is that when the coil 6 of the solenoid valve is not energized, the solenoid valve return spring 4 is in a compressed state, which generates a downward spring force on the armature 9, and the buffer spring 12 is also in a compressed state, which generates an upward spring force on the armature 9, but the spring force of the solenoid valve return spring 4 is greater than the spring force of the buffer spring 12, so that the armature 9 is maintained at the initial position by the resultant force. When the coil 6 of the electromagnetic valve is electrified, a magnetic loop is formed with the iron core 5 and the armature 9, electromagnetic force is generated on the armature 9, the armature 9 drives the armature valve rod 10 to move upwards together, an oil return path is opened, and low-pressure fuel oil is discharged through the through hole of the armature valve rod and the outer side of the armature valve rod 10. When the armature 9 moves upwards to be flush with the lower end of the buffer adjusting gasket 8 in height, the outer edge of the armature 9 and the buffer adjusting gasket 8 generate a throttling damping effect, the fuel oil flow area is suddenly reduced to be shown as a shadow in fig. 4, so that the fuel oil flow area of the upper part and the lower part of the armature 9 is rapidly reduced, the fuel oil cannot rapidly pass through and is extruded, the fuel oil pressure of the part is rapidly increased, resistance is generated when the armature 9 rises, the rising speed of the armature 9 is reduced, the collision between the armature 9 and the iron core 5 is reduced, the rebound after the armature 9 collides is weakened, and the high-speed electromagnetic valve is stably opened. When the coil 6 of the electromagnetic valve is powered off, the electromagnetic force generated by the magnetic circuit disappears, the armature 9 and the armature valve rod 10 start to move downwards under the pressure of the electromagnetic valve return spring 4, when the armature 9 moves downwards to be level with the height of the upper end of the buffer adjusting ring belt 14, the outer edge of the lower end of the armature valve rod 10 and the buffer adjusting ring belt 14 generate a throttling damping effect, the fuel oil flow area is suddenly reduced to be shown as the shadow in fig. 5, the fuel oil flow area of the upper part and the lower part of the armature valve rod 10 is rapidly reduced, the fuel oil cannot rapidly pass through and is extruded, the fuel oil pressure of the part is rapidly increased, resistance is generated on the seating of the armature 9, the movement speed of the armature 9 is reduced, the collision of the valve rod 10 and the valve seat 13 is reduced, the rebound after the valve rod 10 collides is weakened, and the buffer effect is realized. When the armature 9 moves downwards to be level with the height of the upper end of the buffering adjusting ring belt 14, the armature 9 starts to compress the buffering spring 12, the buffering spring 12 gives upward spring force to the armature 9, the movement speed of the armature 9 is reduced, the collision between the valve rod 10 and the valve seat 12 is reduced, the rebound after the collision of the valve rod 10 is weakened, and the high-speed electromagnetic valve is closed stably.
On the basis of the above, the width and height of the cushion adjusting shim 8 and the cushion adjusting ring belt 14 are changed, so that the starting distance of the cushion damping and the adjustment of the cushion degree during the ascending process and the seating process of the armature 9 are realized.
Claims (9)
1. A high-speed electromagnetic valve of a high-pressure common rail oil sprayer for realizing stable multiple injection is characterized in that: the electromagnetic valve comprises a housing, the iron core, armature, the valve rod, the disk seat, fastening nut is installed to the casing top, fastening nut middle part sets up the solenoid valve reset spring seat, the iron core is installed in the casing, winding coil in the recess of iron core, the middle part of iron core sets up middle through-hole, install solenoid valve reset spring in the middle through-hole, the iron core below sets gradually armature, the disk seat, install in armature through-rod fastening nut at the top of valve rod, the bottom of valve rod is located the through-hole of disk seat, solenoid valve reset spring's both ends are solenoid valve reset spring seat and valve rod fastening nut respectively, the valve rod cover between armature and the disk seat has buffer spring, set up the oil return oil circuit in the valve rod.
2. The high-speed electromagnetic valve of the high-pressure common rail injector for realizing the stable multiple injection according to claim 1, is characterized in that: a fixed gasket is arranged on the inner wall of the cavity of the shell where the armature is located, and a buffering and adjusting gasket is arranged between the fixed gasket and the shell as well as between the fixed gasket and the iron core.
3. The high-speed electromagnetic valve of the high-pressure common rail injector for realizing the stable multiple injection according to claim 2, is characterized in that: the inner diameter of the buffering adjusting gasket is smaller than the inner diameter of the fixed gasket and larger than the outer diameter of the armature, and a rising throttling damping gap of 0.004-0.006mm is formed between the buffering adjusting gasket and the outer edge of the armature.
4. The high-speed electromagnetic valve of the high-pressure common rail injector for realizing the stable multiple injection according to claim 2, is characterized in that: the height of the lower end of the buffer adjusting gasket is 80% of the total lifting stroke of the armature.
5. The high-speed electromagnetic valve of the high-pressure common rail injector for realizing the stable multiple injection according to claim 1, is characterized in that: and a buffer adjusting ring belt is arranged below the valve seat.
6. The high-speed electromagnetic valve of the high-pressure common rail injector for realizing the stable multiple injection according to claim 5, characterized in that: the inner diameter of the buffering and adjusting ring belt is larger than the outer diameter of the valve rod, and a seating throttling damping gap of 0.005-0.007mm is formed between the buffering and adjusting ring belt and the outer edge of the lower end of the valve rod.
7. The high-speed electromagnetic valve of the high-pressure common rail injector for realizing the stable multiple injection according to claim 5, is characterized in that: the height of the upper end of the buffering adjusting ring belt is positioned at 80% of the total stroke of the armature seat.
8. The high-speed electromagnetic valve of the high-pressure common rail injector for realizing the stable multiple injection according to claim 1, is characterized in that: the outer edge of the armature is provided with four arc tangent planes.
9. The high-speed electromagnetic valve of the high-pressure common rail injector for realizing the stable multiple injection according to claim 1, is characterized in that: four vertical tangent planes are arranged on the outer edge of the lower end of the valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210226446.0A CN114635819B (en) | 2022-03-09 | 2022-03-09 | High-pressure common rail oil injector high-speed electromagnetic valve capable of realizing stable multiple injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210226446.0A CN114635819B (en) | 2022-03-09 | 2022-03-09 | High-pressure common rail oil injector high-speed electromagnetic valve capable of realizing stable multiple injection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114635819A true CN114635819A (en) | 2022-06-17 |
| CN114635819B CN114635819B (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210226446.0A Active CN114635819B (en) | 2022-03-09 | 2022-03-09 | High-pressure common rail oil injector high-speed electromagnetic valve capable of realizing stable multiple injection |
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| Country | Link |
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| CN (1) | CN114635819B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086826A (en) * | 2009-12-02 | 2011-06-08 | 罗伯特博世有限公司 | Electromagnetic valve for controlling fuel injector or for regulating pressure of high-pressure fuel accumulator |
| US20150041568A1 (en) * | 2011-10-26 | 2015-02-12 | Continental Automotive Gmbh | Valve Assembly For An Injection Valve And Injection Valve |
| CN104847555A (en) * | 2015-04-09 | 2015-08-19 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Oil sprayer improving efficiency of electromagnetic actuator |
| CN105673287A (en) * | 2016-04-07 | 2016-06-15 | 宁波舜田良源油嘴油泵有限公司 | High-voltage common-rail electrically-controlled oil sprayer |
| CN108138715A (en) * | 2015-10-15 | 2018-06-08 | 大陆汽车有限公司 | Fuel injection valve, combustion engine and vehicle with bounce-proof device |
-
2022
- 2022-03-09 CN CN202210226446.0A patent/CN114635819B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086826A (en) * | 2009-12-02 | 2011-06-08 | 罗伯特博世有限公司 | Electromagnetic valve for controlling fuel injector or for regulating pressure of high-pressure fuel accumulator |
| US20150041568A1 (en) * | 2011-10-26 | 2015-02-12 | Continental Automotive Gmbh | Valve Assembly For An Injection Valve And Injection Valve |
| CN104847555A (en) * | 2015-04-09 | 2015-08-19 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Oil sprayer improving efficiency of electromagnetic actuator |
| CN108138715A (en) * | 2015-10-15 | 2018-06-08 | 大陆汽车有限公司 | Fuel injection valve, combustion engine and vehicle with bounce-proof device |
| CN105673287A (en) * | 2016-04-07 | 2016-06-15 | 宁波舜田良源油嘴油泵有限公司 | High-voltage common-rail electrically-controlled oil sprayer |
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| Publication number | Publication date |
|---|---|
| CN114635819B (en) | 2022-12-13 |
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