CN214577485U - Valve rod assembly and high-pressure fuel injection valve - Google Patents
Valve rod assembly and high-pressure fuel injection valve Download PDFInfo
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- CN214577485U CN214577485U CN202120489119.5U CN202120489119U CN214577485U CN 214577485 U CN214577485 U CN 214577485U CN 202120489119 U CN202120489119 U CN 202120489119U CN 214577485 U CN214577485 U CN 214577485U
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Abstract
The utility model relates to a high-pressure fuel injection valve technical field discloses a valve rod assembly, include: the lower end of the control rod stretches into the upper sleeve, the adjusting ring is sleeved outside the control rod, the two ends of the adjusting ring are respectively abutted to the upper end face of the upper sleeve and the shaft shoulder of the control rod, the valve needle stretches into the lower sleeve, the reset spring presses the lower sleeve against the lower end face of the upper sleeve, the adjusting cushion is respectively abutted to the lower end face of the control rod and the valve needle, and the upper sleeve, the lower sleeve, the control rod, the valve needle and the adjusting cushion jointly form a sealed coupling cavity. A high pressure fuel injection valve is also disclosed, including the valve stem assembly described above.
Description
Technical Field
The utility model relates to a high-pressure fuel injection valve technical field particularly relates to a valve rod assembly and high-pressure fuel injection valve.
Background
In the world, the pollutant emission of a power assembly becomes the focus of international social attention, and with the strictness of emission regulations, an engine electronic control fuel injection system capable of realizing high-pressure accurate control injection becomes the only technical route of a diesel engine technology. In order to effectively control the emission of pollutants, the opening and closing of the injection process needs to be accurately controlled, so that the injection waveform reaches a state of slow first and fast second, and meanwhile, the fuel injection valve is required to respond quickly when injecting with small oil quantity and low fuel pressure, so that the engine is facilitated to form more uniform combustible mixed gas, and the effects of reducing oil consumption, reducing the emission of pollutants and improving the running noise of the engine are achieved. Most of high-pressure fuel injection valves are integrated, a control rod is connected with a valve needle through a connecting sleeve, the valve rod assembly of the structure moves upwards or downwards as a whole, the movement stress of the valve rod assembly is completely determined by the pressure of fuel in a control cavity and the spring force of an injection valve spring, and the requirements of smooth and slow opening, crisp closing, small-oil-quantity injection and quick response of low-fuel-pressure injection of the fuel injection valve cannot be met.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a purpose is a valve rod assembly and high-pressure fuel injection valve to solve slow down piston rod or needle opening speed, accelerate piston rod or needle closing speed, improve little oil mass injection and low fuel pressure injection response speed's technical problem.
In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:
according to the utility model discloses an aspect of the embodiment provides a valve rod assembly, include: the lower end of the control rod stretches into the upper sleeve, the adjusting ring is sleeved outside the control rod, the two ends of the adjusting ring are respectively abutted to the upper end face of the upper sleeve and the shaft shoulder of the control rod, the valve needle stretches into the lower sleeve, the reset spring presses the lower sleeve against the lower end face of the upper sleeve, the adjusting cushion is respectively abutted to the lower end face of the control rod and the valve needle, and the upper sleeve, the lower sleeve, the control rod, the valve needle and the adjusting cushion jointly form a sealed coupling cavity.
Furthermore, an upper matching middle hole is formed in the upper sleeve, the upper matching middle hole directly extends to the upper plane and the lower plane of the upper sleeve, or is connected with the upper plane and the lower plane of the upper sleeve through one-step or multi-step holes, and a cross groove or an inclined plane for fuel oil to flow through is formed in the upper portion of the upper sleeve.
Furthermore, a lower matching middle hole is formed in the lower sleeve, and the lower matching middle hole directly extends to the upper plane and the lower plane of the lower sleeve or is connected with the upper plane and the lower plane of the lower sleeve through one-step or multi-step holes.
Further, the diameter of the upper mating center hole is larger than the diameter of the lower mating center hole.
Further, the axial height of the adjustment pad is used to fine tune the overall length of the valve stem assembly.
Further, the axial height of the adjusting ring is used for adjusting the relative positions of the upper sleeve, the lower sleeve and the control rod.
Furthermore, a first outer circular surface matched with the upper matching middle hole is arranged at the lower part of the control rod, and the first outer circular surface is positioned in the upper matching middle hole.
Further, the upper part of the valve needle assembly is provided with a second outer circular surface matched with the lower matching middle hole, and the second outer circular surface is positioned in the lower matching middle hole.
Further, the upper sleeve and the lower sleeve are tightly attached to form a seal.
According to a second aspect of embodiments of the present invention, there is provided a high pressure fuel injection valve comprising a solenoid valve, a control sleeve, an injection valve spring, the valve stem assembly of the first aspect, a housing, a locking cap, a valve body, the electromagnetic valve, the control sleeve, the injection valve spring and the valve rod assembly are arranged on the shell from top to bottom, the valve body is fastened on the lower end surface of the shell by a nozzle fastening cap, the upper part of the control rod is positioned in the control middle hole of the control sleeve, the control sleeve is abutted against the lower part of the electromagnetic valve, the control sleeve, the electromagnetic valve and the control rod together enclose to form a control cavity, the control cavity is provided with an oil inlet communicated with high-pressure fuel, an oil outlet communicated with low-pressure fuel, the electromagnetic valve can open or close the oil outlet, the reset spring is positioned at the lower part of the lower sleeve and is respectively abutted against the lower end surface of the lower sleeve and the valve body.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
according to the above embodiment, the embodiment of the utility model provides a set up sleeve, lower sleeve, reset spring, adjusting ring, adjustment pad between control lever and needle for be in different stress state when the control lever upward movement and downward movement, compromise different performance requirements from this. The stress of the piston rod in the ascending motion and the descending motion is adjusted by arranging the coupling cavity and the return spring, so that the requirements of the fuel injection valve on smooth and slow opening, crisp closing, small-oil-amount injection and quick response to low-fuel-pressure injection are met.
Through the technical scheme of the utility model, the opening speed of the piston rod or the valve needle can be slowed down, the pre-injection effect can be improved, the combustion process is optimized, and the pollutant emission, especially the proportion of NOx, is reduced; the closing speed of the piston rod or the valve needle is accelerated, so that the injection is quickly finished, the injection quantity of low-pressure fuel at the later stage of injection is greatly reduced, poor combustion is controlled, and the pollutant emission, particularly the proportion of PM, is reduced; improving the response of the fuel injection valve at low fuel pressure to realize the injection of the fuel injection valve at low fuel pressure; improving the response of the fuel injection valve under the low fuel injection quantity to realize the accurate control of the low fuel injection quantity; the impact load of the valve body, the valve needle, the control rod and the adjusting pad is reduced, and the reliability is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is to be expressly understood that the drawings in the following description are illustrative of specific embodiments only and are not intended as a definition of the limits of the invention. For a person skilled in the art, it is of course possible to obtain some other embodiments and figures according to the following embodiments of the invention and the figures thereof without inventive work
Fig. 1 is a schematic view of a valve stem assembly according to an embodiment of the present invention, the view being a partially enlarged view at B in fig. 6;
fig. 2 is a schematic structural view of an upper sleeve provided according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a lower sleeve provided according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a control lever provided according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a valve needle provided according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a high-pressure fuel injection valve according to an embodiment of the present invention;
fig. 7 is a partially enlarged structural view of a portion a in fig. 6.
In the figure: 110-a solenoid valve; 120-a control sleeve; 130-injection valve spring 140-high pressure chamber; 150-a housing; 160-nozzle cap tightening; 170-a valve body; 180-oil outlet; 190-oil inlet hole; 210-a control chamber; 201-an adjustment ring; 202-an upper sleeve; 203-adjusting pad; 204-a lower sleeve; 205-lower end surface of the shell; 206-a control lever; 207-a coupling chamber; 208-the valve needle; 209-scapula; 211-a first outer circular surface; 212-a second outer circular face; 213-a cross recess; 214-upper mating mesopore; 215-lower mating mesopores; 216-return spring.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that the terms first, second, third and the like may be used herein to describe various elements, these terms are only used to distinguish one element from another.
According to the prior art, when the electromagnetic valve is electrified to open the oil outlet so that the control chamber is communicated with the low-pressure fuel, the high-pressure fuel flows out from the oil outlet, the pressure intensity of the fuel in the control chamber is reduced, and the control rod, the connecting sleeve and the valve needle or the integrated valve needle overcome the spring force of the injection valve spring and are lifted together under the action of hydraulic pressure. After the current of the electromagnetic valve is cut off, the oil outlet hole is closed, the control chamber and the low fuel are separated, the fuel pressure of the control chamber is increased and balanced with the fuel pressure of the high pressure cavity, and the spring force action of the injection valve enables the control rod and the valve needle to descend. In summary, the upward and downward movements of the control rod and the valve needle are controlled only by the control chamber hydraulic pressure and the injection valve spring force, and this control method cannot fully meet the requirements of the fuel injection valve of smooth and slow opening, crisp closing, and rapid response of small-oil injection and low-fuel-pressure injection.
Therefore, the embodiment of the present invention provides a valve rod assembly, fig. 1 is a schematic structural diagram of a valve rod assembly provided according to an embodiment of the present invention, and the valve rod assembly may be used in a high-pressure fuel injection valve, and may include: the adjustable coupling valve comprises a control rod 206, a valve needle 208, an upper sleeve 202, a lower sleeve 204, a return spring 216, an adjusting ring 201 and an adjusting pad 203, wherein the lower end of the control rod 206 extends into the upper sleeve 204, the adjusting ring 201 is sleeved outside the control rod 206, two ends of the adjusting ring 201 are respectively abutted against the upper end surface of the upper sleeve 202 and a shaft shoulder of the control rod 206, the valve needle 208 extends into the lower sleeve 204, the return spring 216 presses the lower sleeve 204 against the lower end surface of the upper sleeve 202, the upper surface and the lower surface of the adjusting pad 203 are respectively abutted against the control rod 206 and the valve needle 208, and the upper sleeve 202, the lower sleeve 204, the control rod 206, the valve needle 208 and the adjusting pad 203 jointly form a sealed coupling chamber 207 (possibly with a little leakage).
According to the above technical solution, the embodiment of the present invention provides the upper sleeve 202, the lower sleeve 204, the return spring 216, the adjusting ring 201, and the adjusting pad 203 between the control rod 206 and the valve needle 208, so that the control rod is in different stress states when moving upward and downward, thereby meeting different performance requirements. The coupling cavity 207 and the return spring 216 are arranged to adjust the stress of the piston rod in the ascending motion and the descending motion, so that the requirements of smooth and slow opening, crisp closing, small-oil-amount injection and quick response of low-fuel-pressure injection of the fuel injection valve are met.
During the upward and downward movement of the control rod 206, additional hydraulic pressure is provided to the valve stem assembly due to the presence of the coupling chamber 207, such that the control rod 206 and valve needle 208 move more slowly during the upward movement and more rapidly during the downward movement. The slow-rising and rapid-falling movement characteristics can realize the speed reduction of the rising section of the injection rate of the fuel injection valve and the speed acceleration of the falling section of the injection rate. The injection process is beneficial to the formation of more uniform combustible mixed gas for the engine, and has the effects of reducing oil consumption, reducing pollutant discharge and improving the running noise of the engine.
Compared with most of the prior art structures which connect the control rod 206 and the valve needle 208 or the control rod 206 and the valve needle 208 by using connecting sleeves in an integrated mode, the return spring 216 which facilitates the upward movement of the valve rod is arranged, and the spring force of the control return spring 216 only acts at the initial stage of the upward movement and the final stage of the downward movement by setting the relative position of the upper sleeve 202, so that the response of the control rod 206 and the valve needle 208 during the upward movement is rapid. Therefore, the quick response of the fuel injection valve under the working conditions of low fuel pressure and low fuel injection quantity is realized.
Referring to fig. 1 and 2, in this embodiment, the upper sleeve 202 is provided with an upper matching middle hole 214, the upper matching middle hole 214 may be directly connected to the upper and lower planes of the upper sleeve 202, or may be communicated with the upper and lower planes of the upper sleeve 202 through one or more holes, and the upper portion of the upper sleeve 202 is provided with a cross-shaped groove 213 or an inclined surface for fuel to flow through.
Referring to fig. 1 and 3, in the present embodiment, the lower sleeve 204 is provided with a lower matching middle hole 215, and the lower matching middle hole 215 may be directly connected to the upper plane and the lower plane of the lower sleeve 204, or may communicate with the upper plane and the lower plane of the lower sleeve 204 through one or more holes.
Referring to fig. 2 and 3, in the present embodiment, the diameter of the upper fitting center hole 214 should be larger than the diameter of the lower fitting center hole 215.
Referring to fig. 1, in this embodiment, the upper and lower surfaces of the adjusting pad 203 are respectively abutted against the control rod 206 and the valve needle 208, the axial height of the adjusting pad 203 can be used for fine adjustment of the overall length of the valve stem assembly, and the axial height of the adjusting ring 201 can be used for adjusting the relative positions of the upper sleeve 202, the lower sleeve 204 and the control rod 206.
Referring to fig. 1, 4 and 5, in the embodiment, a first external circular surface 211 closely matched with the upper matching central hole 214 is provided at the lower portion of the control rod 206, and the first external circular surface 211 is located in the upper matching central hole 214. The upper portion of the valve pin 208 assembly is provided with a second outer circular surface 212 which is precisely fitted into the lower fitting center hole 215, and the second outer circular surface 212 is located in the lower fitting center hole 215. The flat surface between the upper sleeve 202 and the lower sleeve 204 is highly planar and fits snugly and forms a seal.
The embodiment of the utility model provides a still provide a high-pressure fuel injection valve, refer to fig. 6, including solenoid valve 110, control sleeve 120, injection valve spring 130, foretell valve rod assembly, casing 150, tight cap, valve body 170, solenoid valve 110, control sleeve 120, injection valve spring 130 and valve rod assembly is from last to installing down on the casing 150, control lever 206 upper portion is located in control mesopore of control sleeve 120, control sleeve 120 with solenoid valve 110 lower part looks butt, control sleeve 120, solenoid valve 110, control lever 206 enclose jointly and close and constitute control chamber 210, control chamber 210 is provided with oil inlet 190 with high-pressure fuel UNICOM, with the oil outlet 180 of low-pressure fuel UNICOM the solenoid valve 110 can be opened or close oil outlet 180. The return spring 216 is located at the lower portion of the lower sleeve 204 and is abutted against the lower end surface of the lower sleeve 204 and the valve body 170, respectively. The relative positions of the upper sleeve 202, lower sleeve 204 and control rod 206 determine the axial distance between the upper sleeve 202 and the housing lower end surface 205.
As shown in fig. 1, the high-pressure fuel valve is provided with a high-pressure chamber 140, the high-pressure chamber 140 being defined by the solenoid valve 110, a housing 150, and a valve body 170, the valve body 170 being fixed to a lower portion of the housing by a nipple cap 160, and a control assembly being longitudinally movably disposed in the high-pressure chamber 140. Valve body 170 extends deep into the engine combustion chamber to perform the injection function. An injection valve spring 130 is arranged between the control sleeve 120 and the control rod 206, and the injection valve spring 130 applies a spring force to the control sleeve 120 and the valve stem assembly respectively, the spring force on the one hand abutting the control sleeve 120 against the lower end of the solenoid valve 110, and on the other hand acting on the valve needle 208 via the control rod 206 and the adjusting pad 203 pressing the valve needle 208 in the valve body 170.
The high-pressure chamber 140 of the high-pressure fuel injection valve is filled with fuel under high pressure compressed by a high-pressure oil pump (not shown). This high-pressure fuel is supplied to the high-pressure fuel injection valve high-pressure chamber 140 directly or after pressure accumulation through a common rail. This high pressure fuel is present throughout the high pressure chamber 140 and the valve needle 208 located in the high pressure chamber 140 is subjected to an upward hydraulic force while the upper end of the control rod 206 is located in the control chamber 210, the high pressure fuel in the control chamber 210 subjecting the control rod 206 to a downward hydraulic force. Simultaneously, control rod 206 receives a downward injection valve spring 130 spring force and lower sleeve 204 receives an upward return spring 216 spring force. When the valve stem assembly is subjected to an upward force less than a downward force as a whole, the valve needle 208 presses against the sealing seating surface of the valve body 170 and no fuel injection event occurs. When the upward force is greater than the downward force, the valve needle 208 moves upward, away from the sealing seating surface of the valve body 170, and a fuel injection event occurs.
The coupling cavity 207 and the return spring 216 are arranged to adjust the stress of the piston rod in the ascending motion and the descending motion, so that the requirements of smooth and slow opening, crisp closing, small-oil-amount injection and quick response of low-fuel-pressure injection of the fuel injection valve are met.
When the high-pressure fuel injection valve does not work, the solenoid valve 110 does not receive working current, the solenoid valve 110 closes the oil outlet hole 180, so that the fuel pressures of the high-pressure chamber 140 and the control chamber 210 are consistent, and the fuel pressure is set by the system at the moment. The valve needle 208 is subjected to a downward hydraulic force that is greater than an upward hydraulic force and presses against the sealing seating surface of the valve body 170, and no fuel injection event occurs.
When the high-pressure fuel injection valve is operated, the electromagnetic valve 110 receives an operating current, the electromagnetic valve 110 opens the oil outlet hole 180, fuel starts to flow out from the oil outlet hole 180, and fuel in the high-pressure chamber 140 flows into the control chamber 210 through the oil inlet hole 190. Due to the fuel pressure drop in the control chamber 210 caused by the throttling action of the oil inlet hole 190 and the oil outlet hole 180, when the fuel pressure drops to a certain level, the control rod 206, the upper sleeve 202 and the lower sleeve 204 move upward under the combined action of the return spring 216 and the hydraulic pressure against the spring force of the injection valve spring 130, at the moment when the control rod 206, the upper sleeve 202 and the lower sleeve 204 rise, the volume of the coupling chamber 207 increases, the fuel pressure drops, and the valve needle 208 moves upward along with the control rod 206 under the action of the hydraulic pressure. Until the upper end surface of the upper sleeve 202 abuts against the lower end surface 205 of the housing, the whole valve rod assembly moves upwards at this stage, and the hydraulic pressure in the coupling chamber 207 is an internal force, so that the moving state of the valve rod assembly is not influenced. The valve rod assembly can overcome the spring force to move upwards under the action of the spring force of the return spring 216 at a lower hydraulic pressure, and the fuel injection valve can rapidly inject, so that the requirement of rapid response during small-oil-quantity injection and low-fuel-pressure injection is met.
In the embodiment, after the upper end surface of the upper sleeve 202 abuts against the lower end surface 205 of the housing, the upward movement of the upper sleeve 202 and the lower sleeve 204 is limited, the control rod 206, the valve needle 208 and the adjusting pad 203 continue to move upward, at this time, the control rod 206, the valve needle 208 and the adjusting pad 203 generate relative upward movement with respect to the upper sleeve 202 and the lower sleeve 204, and since the diameter of the upper matching middle hole 214 is larger than that of the lower matching middle hole 215, the total volume of the coupling chamber 207 is increased, and the fuel pressure in the chamber is further reduced. Because the diameter of the upper matching middle hole 214 is larger than that of the lower matching middle hole 215, the resultant force direction of the hydraulic forces acting on the control rod 206 and the valve needle 208 is downward, meanwhile, the spring force of the return spring 216 does not act on the control rod 206 any more, the upward resultant force exerted on the control rod 206 and the valve needle 208 is reduced, and the upward movement of the control rod 206 and the valve needle 208 is slowed down, so that the purpose of slowly opening the high-pressure fuel injection valve is realized.
When the solenoid valve 110 is energized to close the oil outlet 180, the oil inlet 190 continues to flow fuel into the control chamber 210, and when the fuel pressure in the control chamber 210 reaches a certain level, the control rod 206, the upper sleeve 202, the lower sleeve 204, the adjustment pad 203 and the valve needle 208 are forced downward to move downward. Since the increased volume of the coupling chamber 207 cannot be completely filled with leaked fuel, the absolute pressure in the coupling chamber 207 is still lower than the fuel pressure in the high pressure chamber 140 and the control chamber 210, and thus the resultant of the hydraulic forces of the coupling chamber 207 exerted on the control rod 206 and the valve needle 208 is still downward. The control rod 206 and the valve needle 208 move downward under the combined action of the downward spring force of the injection valve spring 130 and the downward hydraulic force of the coupling chamber 207, at a faster speed than under the action of the spring force alone, thereby achieving the purpose of "quick closing" of the high-pressure fuel injection valve.
Since the fuel pressure in the coupling chamber 207 decreases during the raising of the needle 208 and the control rod 206, a small amount of fuel in the injection valve high pressure chamber 140 leaks into the coupling chamber 207. Therefore, the needle valve and the adjusting pad 203 or the control rod 206 and the adjusting pad 203 are filled with surplus fuel at the end of the descending process of the needle valve and the control rod 206, and are in a separated state, at the moment that the needle valve 208 impacts the valve body 170, the control rod 206, the needle valve 208 and the adjusting pad 203 are not in direct contact, and the fuel between the control rod 206 and the adjusting pad 203 plays a role of buffering, thereby reducing the abrasion of the valve body 170, the needle valve 208, the control rod 206 and the adjusting pad 203. During the damping process, the fuel pressure in the coupling chamber 207 is increased, hydraulic pressure acts on the upper sleeve 202 and the lower sleeve 204 to force the upper sleeve 202 and the lower sleeve 204 to separate, and excess fuel flows out of the coupling chamber 207 through the separated gap, thereby controlling the maximum impact force of the nozzle needle on the needle valve body 170. The upper sleeve 202 and the lower sleeve 204 then re-abut under the action of the return spring 216, ready for the next movement.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A valve stem assembly, comprising: the lower end of the control rod stretches into the upper sleeve, the adjusting ring is sleeved outside the control rod, the two ends of the adjusting ring are respectively abutted to the upper end face of the upper sleeve and the shaft shoulder of the control rod, the valve needle stretches into the lower sleeve, the reset spring presses the lower sleeve against the lower end face of the upper sleeve, the adjusting cushion is respectively abutted to the lower end face of the control rod and the valve needle, and the upper sleeve, the lower sleeve, the control rod, the valve needle and the adjusting cushion jointly form a sealed coupling cavity.
2. The valve rod assembly as claimed in claim 1, wherein the upper sleeve has an upper fitting central hole therein, the upper fitting central hole directly extends to the upper and lower planes of the upper sleeve or connects the upper and lower planes of the upper sleeve through one or more holes, and the upper portion of the upper sleeve is provided with a cross-shaped groove or an inclined surface for the fuel to flow through.
3. A valve stem assembly as defined in claim 2, wherein the lower sleeve has a lower fitting central hole formed therein, the lower fitting central hole extending directly to the upper and lower planes of the lower sleeve or connecting the upper and lower planes of the lower sleeve through one or more holes.
4. A valve stem assembly as defined in claim 3, wherein said upper mating center hole has a diameter greater than a diameter of said lower mating center hole.
5. A valve stem assembly as defined in claim 1, wherein the axial height of the adjustment pad is used to fine tune the overall length of the valve stem assembly.
6. The valve stem assembly of claim 1, wherein the axial height of the adjustment ring is used to adjust the relative positions of the upper and lower bushings and the control rod.
7. A valve stem assembly as defined in claim 2 wherein said lower control rod portion is provided with a first exterior circular surface which mates with said upper mating central opening, said first exterior circular surface being located in said upper mating central opening.
8. A valve stem assembly as defined in claim 3 wherein said upper portion of said valve pin assembly is provided with a second outer circular surface which mates with said lower mating central bore, said second outer circular surface being located in said lower mating central bore.
9. The valve stem assembly of claim 1, wherein the upper and lower sleeves form a seal after a tight fit therebetween.
10. A high-pressure fuel injection valve characterized in that: including solenoid valve, control sleeve, injection valve spring, the valve rod subassembly of any one of claims 1-9, casing, tight cap, valve body, solenoid valve, control sleeve, injection valve spring and valve rod subassembly from last to installing down on the casing, the valve body is fastened on terminal surface under the casing by the tight cap of glib talker, control lever upper portion is located in control telescopic control mesopore, control sleeve with solenoid valve lower part looks butt, control sleeve, solenoid valve, control rod enclose jointly and close and constitute the control chamber, the control chamber be provided with the inlet port of high-pressure fuel UNICOM, with the oil outlet of low-pressure fuel UNICOM the solenoid valve can open or close the oil outlet, reset spring is located down the sleeve lower part, respectively with under the sleeve terminal surface with the valve body butt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120489119.5U CN214577485U (en) | 2021-03-08 | 2021-03-08 | Valve rod assembly and high-pressure fuel injection valve |
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| CN202120489119.5U CN214577485U (en) | 2021-03-08 | 2021-03-08 | Valve rod assembly and high-pressure fuel injection valve |
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| CN214577485U true CN214577485U (en) | 2021-11-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796916A (en) * | 2021-03-08 | 2021-05-14 | 上海钧风电控科技有限公司 | Valve rod assembly and high-pressure fuel injection valve |
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2021
- 2021-03-08 CN CN202120489119.5U patent/CN214577485U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796916A (en) * | 2021-03-08 | 2021-05-14 | 上海钧风电控科技有限公司 | Valve rod assembly and high-pressure fuel injection valve |
| CN112796916B (en) * | 2021-03-08 | 2024-03-19 | 钧风电控科技(泰州)有限责任公司 | Valve rod assembly and high-pressure fuel injection valve |
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Effective date of registration: 20230531 Address after: 225500 No. 1, Shuguang Middle Road, Baimi Town, Jiangyan District, Taizhou City, Jiangsu Province Patentee after: Junfeng electric control technology (Taizhou) Co.,Ltd. Address before: Room 211, building 21, 1158 Jiuting Central Road, Jiuting Town, Songjiang District, Shanghai, 201615 Patentee before: Shanghai Junfeng Electric Control Technology Co.,Ltd. |
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