Spring opening pressure regulating mechanism of oil sprayer control valve

Abstract

The invention provides a spring opening pressure regulating mechanism of an oil injector control valve, and relates to the technical field of oil injector control valves. The fuel injector body comprises a control valve rod, a control valve seat, a pressure adjusting spring, an adjusting pad, a locking pad, an opening sleeve and a fuel injector shell, the opening sleeve is fixed in an annular groove in the upper portion of the control valve rod through the locking pad, and it is guaranteed that the lower end of the pressure adjusting spring is stably fixed to the adjusting pad on the locking pad in the working process of the fuel injector body; the pressure regulating spring eliminates the phenomena of up-down picking and inclination in the working process, spring pressure transmission consistency in a control valve component is guaranteed, the control valve spring opening pressure regulating assembly is applied to a static leakage-free oil sprayer body, and the oil return amount in the working process of an oil sprayer body assembly is reduced by more than 50% compared with a conventional oil sprayer body assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of fuel injector control valves, and more specifically, particularly relates to a spring opening pressure regulating mechanism of a fuel injector control valve. Background Art

[0002] Marine diesel engines are the main propulsion or power station power for ships (military and civilian) surface and underwater ships and special ships (coastal police, maritime surveillance, fishery administration, anti-smuggling, marine surveys). The manufacturing technology of medium- and high-speed high-power marine diesel engines is extremely complex, among which the core component technology represented by the high-pressure common rail electronic fuel injection system is the key. Not only high performance is required, but also safety and reliability must be guaranteed. It acts like the "heart" of the engine, using extremely precise timing and quantitative control to provide fuel with a pressure of up to 180MPa in the protective shell to the cylinder of the engine, thereby achieving an efficient working process. It is characterized by high power, good enthusiasm, energy saving, and emission reduction, which meets the development goals advocated by the country and cannot be replaced by all thermal engines including gasoline engines.

[0003] In traditional fuel injectors, the component used to fix and support the pressure regulating spring is usually an open elastic gasket with a thickness of about 0.6mm. This gasket is easy to fall off and tilt, resulting in unstable pressure transmission of the pressure regulating spring during operation, affecting the consistency of opening and closing of the fuel injector, and then causing changes in the fuel law of the diesel engine, which deteriorates the power, fuel consumption, emissions and comfort of the diesel engine. Moreover, this thin gasket is easy to break during the operation of the fuel injector, causing the fuel injector to fail completely. In addition, its processing technology is poor, which increases the manufacturing cost of the fuel injector.

[0004] In terms of the overall structure of the fuel injector, the diameter of the traditional control valve stem ring groove is small and the strength is insufficient. The control valve stem is prone to breakage during the operation of the fuel injector, affecting the reliability of the fuel injector assembly. In terms of the maintenance of the fuel injector when not in use, there was a lack of effective protection and maintenance measures in the past. The fuel injector housing and fuel injection nozzle are easily exposed to the external environment when idle, and are prone to rust and corrosion, affecting the performance and service life of the fuel injector. Moreover, when using maintenance oil, it is easy to leak and waste, which is neither economical nor safe. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a spring opening pressure regulating mechanism for an injector control valve to solve the above problems.

[0006] A spring opening pressure regulating mechanism of an injector control valve comprises an injector body and a main outer sleeve, wherein the surface of the injector body is provided with an injector shell, wherein the injector body comprises a control valve stem, a control valve seat, a pressure regulating spring, an adjusting pad, a locking pad, an opening sleeve and an injector shell, wherein the opening sleeve is arranged outside the control valve stem, and an injection nozzle is arranged at the end of the control valve stem, wherein the injection nozzle protrudes outside the injector shell, the locking pad is fixedly mounted on the opening sleeve, the adjusting pad is mounted on the locking pad, and the adjusting pad is used to adjust the pre-pressure of the pressure regulating spring. The pressure regulating spring is installed on the adjusting pad. The pressure regulating spring, adjusting pad, locking pad and opening sleeve constitute a control valve spring opening pressure regulating component. The control valve spring opening pressure regulating component and the control valve seat are assembled into a control valve assembly. The main outer sleeve is arranged outside the end of the injector housing. A first sleeve ring is arranged below the main outer sleeve. A sponge sleeve ring is arranged inside the first sleeve ring. At least two sponge strips are arranged on the inner wall of the sponge sleeve ring. At least two sponge blocks are fixedly installed on the bottom of the inner side of the sponge sleeve ring. The injector nozzle is plugged into the sponge sleeve ring.

[0007] Preferably, the number of the open sleeves is two, and the two open sleeves are symmetrically installed on the control valve stem, the surface of the control valve stem is provided with an annular groove, the open sleeve is installed inside the annular groove provided on the control valve stem, the lower end surface of the open sleeve is in close contact with the bottom of the annular groove, the outer sleeve of the injector housing is provided with a protective shell, the main outer sleeve is located below the protective shell, and two sealing sleeves are slidably installed on the top of the main outer sleeve.

[0008] Preferably, a first rod is fixedly installed on the top of the two sealing sleeves, a lower fixed sleeve is fixedly installed on the top of both sides of the main outer sleeve, a micro spring is fixedly installed between the two first rods and the lower fixed sleeves, the main outer sleeve is arranged outside the first sleeve ring, a third sleeve ring is arranged inside the first sleeve ring, a second sleeve ring is installed between the first sleeve ring and the third sleeve ring, a second sealing ring is fixedly installed between the tops of the second sleeve ring and the third sleeve ring, and at least two rectangular grooves are opened through the side wall of the third sleeve ring, and a cotton oil pad is fixedly installed in each rectangular groove.

[0009] Preferably, a first sealing ring is fixedly installed between the top of the third ring and the outer side wall of the sponge ring, at least two extrusion sleeves are fixedly installed on the side wall of the sponge ring, and the rectangular grooves formed in each extrusion sleeve and the third ring are staggered, at least two rubber pads are fixedly installed in an annular shape on the inner wall of the sponge ring, and each rubber pad is located inside the arc-shaped sponge strip, an arc-shaped sponge strip is fixedly installed on the side wall of each arc-shaped sponge strip, a groove is formed on the top of each sponge block, and a conical sponge block is fixedly installed inside each groove, the side wall of the fuel injector is in contact with multiple sponge strips and the arc-shaped sponge strips, and the end of the fuel injector is in contact with multiple grooves and the conical sponge block.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] In the present invention, the opening sleeve is fixed in the annular groove on the upper part of the control valve stem by adopting a locking pad, so as to ensure that the lower end of the pressure regulating spring is firmly fixed to the adjusting pad above the locking pad during the operation of the injector body, and the pressure regulating spring eliminates the up and down tossing and tilting phenomenon during the operation, so as to ensure the consistency of the spring pressure transmission in the control valve component. The traditional structure adopts an opening elastic gasket with a thickness of about 0.6 mm, which is buckled in the annular groove on the upper part of the control valve stem by a certain elastic deformation. The structure is easy to fall off and tilt, resulting in irregular pressure changes of the pressure regulating spring during the operation of the injector body, affecting the consistency of opening and closing of the injector body, causing the fuel provided by the injector body to change regularly, resulting in deterioration of the power, fuel consumption, emission, comfort and other performances of the diesel engine. On the other hand, the traditional opening elastic gasket is too thin and is easy to break during the operation of the injector body, resulting in complete failure of the injector body. At the same time, the traditional opening elastic gasket has poor processing technology, which increases the manufacturing cost of the injector body.

[0012] In the present invention, by adopting a double-sided open sleeve structure, the diameter of the control valve stem ring groove can be increased to 3 mm, while the diameter of the ring groove of the traditional structure is only 2.2 mm, which greatly improves the strength of the control valve stem and prevents the control valve stem from breaking during the operation of the injector body, thereby ensuring the reliability of the injector body assembly.

[0013] In the present invention, by applying the control valve spring opening pressure regulating component to the static leak-free injector body, the return oil volume of the injector body assembly during operation is reduced by more than 50% compared with the conventional injector body assembly. Due to the reduction in the return oil volume, the power loss caused by the diesel engine high-pressure oil pump outputting more fuel and the diesel engine being fully cooled is reduced, thereby effectively improving the effective power output of the diesel engine.

[0014] In the present invention, when the injector housing and the injector body are not in use as a whole, the injector housing and the injector body are placed in a protective shell as a whole, and the ends of the injector housing and the injector nozzle are covered by the main outer sleeve, the first sleeve ring and the support sleeve, and the end of the injector nozzle is located inside the sponge sleeve ring. WD-40 (light lubricant) is absorbed in the second sleeve ring, and the WD-40 will enter the sponge sleeve ring and contact the surface of the injector nozzle. It can clean and form a protective film on the surface of the injector nozzle to prevent rust and corrosion.

[0015] In the present invention, when the fuel injector is inserted into the sponge ring, the sponge ring is squeezed by the fuel injector to expand outward, the force of the sponge ring is transmitted to the squeezing sleeve, the force of the squeezing sleeve is transmitted to the third ring, the third ring is forced to squeeze the second ring, and the WD-40 inside the second ring will enter between the sponge ring and the squeezing sleeve through the rectangular groove formed in the third ring, and the sponge ring absorbs the WD-40. Since the outer wall of the fuel injector is in contact with the sponge ring, the sponge ring can better maintain the fuel injector, and effectively prevent the fuel injector from rusting when it is not used for a long time.

[0016] In the present invention, the injector housing is rotated as a whole, and the rotation of the injector housing drives the end of the injector nozzle to rotate. The injector nozzle rotates inside the sponge collar, and the rotation of the injector nozzle contacts with a plurality of arc-shaped sponge strips. The plurality of rubber pads and sponge strips support the arc-shaped sponge strips, and the plurality of arc-shaped sponge strips scrape the surface of the injector nozzle, thereby effectively ensuring that the surface of the injector nozzle is filled with WD-40, and at the same time ensuring that the surface of the injector nozzle is kept clean and impurities are avoided.

[0017] In the present invention, after the fuel injector is inserted into the sponge collar, the end of the fuel injector contacts with a plurality of sponge blocks, and grooves are provided above the plurality of sponge blocks, so that the grooves are filled with WD-40, and at the same time, the end of the conical sponge block supports the end of the fuel injector, effectively ensuring the lubrication of the end of the fuel injector, further protecting the fuel injector, and effectively improving the storage capacity of the fuel injector when not in use.

[0018] In the present invention, WD-40 is absorbed by the second sleeve ring, so that the WD-40 leakage phenomenon of the injector housing when being taken out is effectively prevented, and a cotton oil pad is arranged in the rectangular groove of the third sleeve ring, so that the WD-40 can be indirectly transferred with the sponge sleeve ring after being discharged, and the liquid will not flow out, which greatly improves the safety of WD-40 use. After the injector nozzle is pulled out, the two micro springs drive the two sealing sleeves to approach each other through elastic force, and the side walls of the two sealing sleeves are magnetically attracted. At this time, the two sealing sleeves seal the end of the main outer sleeve, effectively preventing the WD-40 from leaking, and facilitating subsequent recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the fuel injector housing of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the fuel injection nozzle of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the main outer jacket of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the first sealing ring of the present invention;

[0023] Figure 5 It is a schematic diagram of the first ring structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the extrusion sleeve of the present invention;

[0025] Figure 7 The present invention Figure 6 A schematic diagram of the enlarged structure at B;

[0026] Figure 8 It is a schematic diagram of the overall structure of the fuel injector body of the present invention;

[0027] Fig. 9 The present invention Figure 8 A schematic diagram of the enlarged structure at point A;

[0028] Fig.10 It is a schematic diagram of the structure of the open sleeve of the present invention.

[0029] In the figure, the corresponding relationship between the component names and the figure numbers is: 1. control valve stem; 11. control valve seat; 12. pressure regulating spring; 13. adjustment pad; 14. locking pad; 15. open sleeve; 16. injector housing; 17. injector nozzle; 18. protective shell; 2. main outer sleeve; 21. sealing sleeve; 22. first rod; 23. micro spring; 24. lower fixed sleeve; 25. first sleeve ring; 26. support sleeve; 28. second sleeve ring; 29. ​​third sleeve ring; 3. cotton oil pad; 31. first sealing ring; 32. sponge sleeve ring; 33. extrusion sleeve; 35. sponge strip; 36. rubber pad; 37. arc sponge strip; 39. sponge block; 4. groove; 41. conical sponge block; 42. second sealing ring; 5. injector body. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0031] See also Figure 1-10The present invention provides a spring opening pressure regulating mechanism of an injector control valve, comprising an injector body 5 and a main outer sleeve 2. An injector housing 16 is installed on the surface of the injector body 5. The injector body 5 comprises a control valve stem 1, a control valve seat 11, a pressure regulating spring 12, an adjusting pad 13, a locking pad 14, an opening sleeve 15 and an injector housing 16. The opening sleeve 15 is arranged outside the control valve stem 1. An injection nozzle 17 is arranged at the end of the control valve stem 1. The injection nozzle 17 protrudes outside the injector housing 16. The locking pad 14 is fixedly installed on the opening sleeve 15. The adjusting pad 13 is installed on the locking pad 14. The adjusting pad 13 is used to adjust the pre-pressure of the pressure regulating spring 12. The pressure regulating spring 12 is installed on the adjusting pad 13. The pressure regulating spring 12 and the adjusting pad 13 , locking pad 14 and opening sleeve 15 constitute the control valve spring opening pressure regulating component, the control valve spring opening pressure regulating component and the control valve seat 11 are assembled into a control valve assembly, the main outer sleeve 2 is sleeved outside the end of the injector housing 16, a first sleeve ring 25 is arranged below the main outer sleeve 2, a sponge sleeve ring 32 is arranged inside the first sleeve ring 25, the inner wall of the sponge sleeve ring 32 is arranged with at least two sponge strips 35, at least two sponge blocks 39 are fixedly installed on the bottom of the inner side of the sponge sleeve ring 32, the fuel injection nozzle 17 is plugged into the sponge sleeve ring 32, so as to solve the consistency of opening and closing of the injector during operation, and provide diesel engine fuel with precise timing and quantitative quantity. The control valve assembly accurately controls the opening and closing of fuel injection in the injector, and is a key control component in the injector assembly.

[0032] There are two open sleeves 15, and the two open sleeves 15 are symmetrically installed on the control valve stem 1. The surface of the control valve stem 1 is provided with an annular groove, and the open sleeve 15 is installed inside the annular groove provided in the control valve stem 1. The lower end surface of the open sleeve 15 is in close contact with the bottom of the annular groove. The outer shell of the injector housing 16 is provided with a protective shell 18, and the main outer shell 2 is located below the protective shell 18. Two sealing sleeves 21 are slidably installed on the top of the main outer shell 2, which ensures that the lower end of the pressure regulating spring 12 of the injector body 5 is firmly fixed on the adjustment pad 13 during operation, and the pressure regulating spring 12 eliminates the up and down tossing and tilting phenomenon during operation, ensuring the consistency of the spring pressure transmission of the control valve assembly, the installation annular groove of the control valve stem 1 has a thick diameter, high strength, is not easy to break, and has high reliability. By adopting the double-sided open sleeve 15 structure, the diameter of the annular groove of the control valve stem 1 can be increased to 3mm, and the diameter of the annular groove of the traditional structure is only 2.2mm, which greatly improves the strength of the control valve stem 1, and the control valve stem 1 will not break during the operation of the injector body 5, ensuring the reliability of the injector body 5 assembly.

[0033] The tops of the two sealing sleeves 21 are fixedly mounted with first rods 22, the tops of the two sides of the main outer sleeve 2 are fixedly mounted with lower fixed sleeves 24, and micro springs 23 are fixedly mounted between the two first rods 22 and the lower fixed sleeves 24. The user rotates the injector housing 16 as a whole, and the rotation of the injector housing 16 drives the end of the injector nozzle 17 to rotate. The injector nozzle 17 rotates inside the sponge collar 32, and the rotation of the injector nozzle 17 will contact with multiple arc-shaped sponge strips 37. Multiple rubber pads 36 and sponge strips 35 are used to rotate the arc-shaped sponge strips 37. Support, multiple arc-shaped sponge strips 37 scrape the surface of the fuel injector 17, the main outer sleeve 2 is set outside the first ring 25, the third ring 29 is set inside the first ring 25, the second ring 28 is installed between the first ring 25 and the third ring 29, and the second sealing ring 42 is fixedly installed between the second ring 28 and the top of the third ring 29. The side wall of the third ring 29 is penetrated by at least two rectangular grooves, and a cotton oil pad 3 is fixedly installed in each rectangular groove. The lower end of the first ring 25 is fixedly installed with a support sleeve 26.

[0034] A first sealing ring 31 is fixedly installed between the top of the third ring 29 and the outer side wall of the sponge ring 32, at least two extrusion sleeves 33 are fixedly installed on the side wall of the sponge ring 32, and the rectangular grooves opened in each extrusion sleeve 33 and the third ring 29 are staggered, at least two rubber pads 36 are fixedly installed in an annular shape on the inner wall of the sponge ring 32, and each rubber pad 36 is located inside the arc-shaped sponge strip 37, and the side wall of each arc-shaped sponge strip 37 is fixedly installed with an arc-shaped sponge strip 37, a groove 4 is opened on the top of each sponge block 39, and a conical sponge block 41 is fixedly installed inside each groove 4, the side wall of the fuel injector 17 is in contact with multiple sponge strips 35 and the arc-shaped sponge strip 37, and the end of the fuel injector 17 is in contact with multiple grooves 4 and the conical sponge block 41.

[0035] Working principle:

[0036] In the first step, in the present invention, the locking pad 14 is used to fix the open sleeve 15 in the annular groove on the upper part of the control valve stem 1, so as to ensure that the lower end of the pressure regulating spring 12 of the injector body 5 is firmly fixed to the adjusting pad 13 on the locking pad 14 during operation. The pressure regulating spring 12 eliminates the up and down tossing and tilting phenomenon during operation, and ensures the consistency of spring pressure transmission in the control valve component. The traditional structure adopts an open elastic gasket with a thickness of about 0.6 mm, which is buckled in the annular groove on the upper part of the control valve stem 1 by a certain elastic deformation. The structure is easy to fall off and tilt, resulting in irregular pressure changes of the pressure regulating spring 12 during the operation of the injector body 5, affecting the consistency of opening and closing of the injector body 5, causing the injector body 5 to provide diesel fuel. The fuel consumption, emission, comfort and other performances of the diesel engine deteriorate. On the other hand, the traditional open elastic gasket is too thin, and the injector body 5 is easy to break during operation, resulting in the complete failure of the injector body 5. At the same time, the processing technology of the traditional open elastic gasket is poor, which increases the manufacturing cost of the injector body 5.

[0037] In the present invention, by adopting the double-sided open sleeve 15 structure, the diameter of the ring groove of the control valve stem 1 can be increased to 3 mm, while the diameter of the ring groove of the traditional structure is only 2.2 mm, which greatly improves the strength of the control valve stem 1 and prevents the control valve stem 1 from breaking during the operation of the injector body 5, thereby ensuring the reliability of the injector body 5 assembly.

[0038] In the present invention, by applying the control valve spring opening pressure regulating component to the static leak-free injector body 5, the return oil volume of the injector body 5 assembly during operation is reduced by more than 50% compared with the conventional injector body 5 assembly. Due to the reduction in the return oil volume, the power loss caused by the diesel engine high-pressure oil pump outputting more fuel and the diesel engine being fully cooled is reduced, thereby effectively improving the effective power output of the diesel engine.

[0039] The second step is that when the fuel injector housing 16 and the fuel injector body 5 are not used as a whole, the fuel injector housing 16 and the fuel injector body 5 are placed in the protective shell 18 as a whole, and the ends of the fuel injector housing 16 and the fuel injector nozzle 17 are covered by the main outer sleeve 2, the first sleeve ring 25 and the support sleeve 26, and the end of the fuel injector nozzle 17 is located inside the sponge sleeve ring 32. WD-40 (light lubricant) is absorbed in the second sleeve ring 28, and WD-40 will enter the sponge sleeve ring 32 and contact the surface of the fuel injector nozzle 17, which can clean and form a protective film on the surface of the fuel injector nozzle 17 to prevent rust and corrosion;

[0040] When the fuel injector 17 is inserted into the sponge ring 32, the sponge ring 32 is squeezed by the fuel injector 17 to expand outward, the force of the sponge ring 32 is transmitted to the extrusion sleeve 33, the force of the extrusion sleeve 33 is transmitted to the third ring 29, the third ring 29 is forced to squeeze the second ring 28, and the WD-40 inside the second ring 28 will pass through the rectangular groove formed by the third ring 29 and enter between the sponge ring 32 and the extrusion sleeve 33. The sponge ring 32 absorbs the WD-40. Since the outer wall of the fuel injector 17 is in contact with the sponge ring 32, the sponge ring 32 can better maintain the fuel injector 17 and effectively prevent the fuel injector 17 from rusting when it is not used for a long time.

[0041] Before using the fuel injector 17 each time, the user rotates the fuel injector housing 16 as a whole. The rotation of the fuel injector housing 16 drives the end of the fuel injector 17 to rotate. The fuel injector 17 rotates inside the sponge collar 32, and the rotation of the fuel injector 17 will contact the multiple arc-shaped sponge strips 37. The multiple rubber pads 36 and sponge strips 35 support the arc-shaped sponge strips 37. The multiple arc-shaped sponge strips 37 scrape the surface of the fuel injector 17, effectively ensuring that the surface of the fuel injector 17 is filled with WD-40. At the same time, it can ensure that the surface of the fuel injector 17 remains clean and avoids impurities.

[0042] After the fuel injector 17 is inserted into the sponge collar 32, the end of the fuel injector 17 contacts the multiple sponge blocks 39. A groove 4 is provided above the multiple sponge blocks 39, so the groove 4 will be filled with WD-40. At the same time, the end of the conical sponge block 41 supports the end of the fuel injector 17, effectively ensuring the lubrication of the end of the fuel injector 17, further protecting the fuel injector 17, and effectively improving the storage capacity of the fuel injector 17 when not in use.

[0043] The third step is to absorb the WD-40 by the second ring 28, effectively preventing the WD-40 from leaking when the injector housing 16 is taken out. At the same time, the cotton oil pad 3 is arranged in the rectangular groove of the third ring 29, so that the WD-40 can be indirectly transferred with the sponge ring 32 after being discharged, and the liquid will not flow out, which greatly improves the safety of the use of WD-40. After the injector nozzle 17 is pulled out, the two micro springs 23 drive the two sealing sleeves 21 to approach each other through elastic force, and the side walls of the two sealing sleeves 21 are magnetically attracted. At this time, the two sealing sleeves 21 seal the end of the main jacket 2, effectively preventing the leakage of WD-40, and facilitating the subsequent recycling.

[0044] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A spring opening pressure regulating mechanism of an injector control valve, comprising an injector body (5) and a main housing (2), wherein an injector housing (16) is mounted on the surface of the injector body (5), characterized in that: The fuel injector body (5) comprises a control valve stem (1), a control valve seat (11), a pressure regulating spring (12), an adjustment pad (13), a locking pad (14), an open sleeve (15) and a fuel injector housing (16); the open sleeve (15) is arranged outside the control valve stem (1); an fuel injection nozzle (17) is arranged at the end of the control valve stem (1); and the fuel injection nozzle (17) protrudes outside the fuel injector housing (16); The locking washer (14) is fixedly mounted on the open sleeve (15), the adjusting washer (13) is mounted on the locking washer (14), and the adjusting washer (13) is used to adjust the pre-pressure of the pressure regulating spring (12); The pressure regulating spring (12) is installed on the adjusting pad (13); the pressure regulating spring (12), the adjusting pad (13), the locking pad (14) and the opening sleeve (15) constitute a control valve spring opening pressure regulating component; the control valve spring opening pressure regulating component and the control valve seat (11) are assembled into a control valve assembly; The main outer sleeve (2) is sleeved outside the end of the injector housing (16); a first sleeve ring (25) is arranged below the main outer sleeve (2); a sponge sleeve ring (32) is arranged inside the first sleeve ring (25); at least two sponge strips (35) are arranged on the inner wall of the sponge sleeve ring (32); at least two sponge blocks (39) are fixedly installed on the bottom of the inner side of the sponge sleeve ring (32); and the injector nozzle (17) is plugged into the inside of the sponge sleeve ring (32).

2. A spring opening pressure regulating mechanism for a fuel injector control valve as claimed in claim 1, characterized in that: The number of the open sleeves (15) is two, and the two open sleeves (15) are symmetrically mounted on the control valve stem (1).

3. A spring opening pressure regulating mechanism for a fuel injector control valve as claimed in claim 2, characterized in that: The surface of the control valve stem (1) is provided with an annular groove, the open sleeve (15) is installed inside the annular groove provided in the control valve stem (1), and the lower end surface of the open sleeve (15) is in close contact with the bottom of the annular groove.

4. A spring opening pressure regulating mechanism for a fuel injector control valve as claimed in claim 1, characterized in that: The injector housing (16) is provided with a protective shell (18) on its outer shell, the main outer shell (2) is located below the protective shell (18), and two sealing sleeves (21) are slidably mounted on the top of the main outer shell (2).

5. A spring opening pressure regulating mechanism for a fuel injector control valve as claimed in claim 4, characterized in that: A first rod (22) is fixedly mounted on the top of each of the two sealing sleeves (21), a lower fixed sleeve (24) is fixedly mounted on the top of each of the two sides of the main outer sleeve (2), and a micro spring (23) is fixedly mounted between each of the two first rods (22) and the lower fixed sleeve (24).

6. A spring opening pressure regulating mechanism for a fuel injector control valve as claimed in claim 1, characterized in that: The main outer sleeve (2) is sleeved outside the first sleeve ring (25), a third sleeve ring (29) is sleeved inside the first sleeve ring (25), a second sleeve ring (28) is installed between the first sleeve ring (25) and the third sleeve ring (29), and a second sealing ring (42) is fixedly installed between the tops of the second sleeve ring (28) and the third sleeve ring (29).

7. A spring opening pressure regulating mechanism for a fuel injector control valve as claimed in claim 6, characterized in that: At least two rectangular grooves are formed through the side wall of the third sleeve ring (29), and a cotton oil pad (3) is fixedly installed in each rectangular groove.

8. A spring opening pressure regulating mechanism for a fuel injector control valve as claimed in claim 7, characterized in that: A first sealing ring (31) is fixedly installed between the top of the third ring (29) and the outer wall of the sponge ring (32), and at least two extrusion sleeves (33) are fixedly installed on the side wall of the sponge ring (32), and the rectangular grooves formed in each extrusion sleeve (33) and the third ring (29) are staggered.

9. A spring opening pressure regulating mechanism for a fuel injector control valve as claimed in claim 1, characterized in that: At least two rubber pads (36) are fixedly mounted in an annular shape on the inner wall of the sponge ring (32), and each rubber pad (36) is located inside the arc-shaped sponge strip (37). The side wall of each arc-shaped sponge strip (37) is fixedly mounted with an arc-shaped sponge strip (37).

10. A spring opening pressure regulating mechanism for a fuel injector control valve as claimed in claim 1, characterized in that: A groove (4) is formed on the top of each sponge block (39), and a conical sponge block (41) is fixedly installed inside each groove (4). The side wall of the fuel injection nozzle (17) contacts the plurality of sponge strips (35) and the arc-shaped sponge strips (37), and the end of the fuel injection nozzle (17) contacts the plurality of grooves (4) and the conical sponge block (41).

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