CN112283281B

CN112283281B - Damping adjusting valve and method for vibration absorber

Info

Publication number: CN112283281B
Application number: CN202011141289.0A
Authority: CN
Inventors: 崔熙贵; 程玲玲; 崔承云; 陈太煌; 舒刚易
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2022-08-23
Anticipated expiration: 2040-10-22
Also published as: CN112283281A

Abstract

The invention provides a damping regulating valve for a shock absorber and a method, wherein the damping regulating valve comprises a regulating valve component, a piston valve component, a main valve core, a piston rod, a regulating valve limiting block, a working cylinder barrel and a controller; the regulating valve component, the piston valve component, the main valve core, the piston rod and the regulating valve limiting block are arranged in the working cylinder barrel; the regulating valve assembly comprises a regulating valve main body, an annular armature, a magnetism isolating ring, a regulating valve base, a flow valve plate, a first elastic part, a damping through hole D, an excitation coil, a sealing valve cover and a second elastic part; the piston valve assembly comprises a piston valve main body, a damping through hole A, a reset valve plate, a locking nut, a damping through hole B, a damping through hole C and a flow valve plate; the invention combines the regulating valve component and the piston valve component, realizes the twice regulation of the damping force by regulating the flow area of the damping through hole D and the opening force of the flow valve plate, and has the advantages of active control, stepless regulation of the damping, high dynamic response speed, high automation degree, small installation space and the like.

Description

Damping adjusting valve and method for vibration absorber

Technical Field

The invention belongs to the technical field of automobile vibration reduction, and particularly relates to a damping stepless adjustable vibration absorber and a method. In particular to a bidirectional damping stepless regulating valve for a shock absorber, which can carry out two damping regulation and is suitable for damping regulation of single-cylinder and double-cylinder shock absorbers.

Background

The shock absorber is an important component of an automobile suspension system and is a main damping element for dissipating energy transmitted to an automobile body from a road surface, and the performance of the shock absorber directly influences the performance of the suspension system, so that the running smoothness and the operation stability of an automobile are influenced. Ride comfort and operating stability are contradictory to a certain extent, and ride comfort requires the shock absorber to provide a smaller damping force, and operating stability requires the shock absorber to provide a larger damping force. To solve the problems, the shock absorber has the adjustable capacity, the damping force adjusting range is required to be wider, the response speed is high, and the shock absorber can be suitable for and cover most road conditions. The traditional damping non-adjustable shock absorber cannot meet the requirements of people, and in order to meet the requirements of different road conditions, the research and development of the damping adjustable shock absorber are continuously and deeply carried out in recent years.

Application number 201710468720.4 discloses an adjustable damping shock absorber, its damping adjustment unit includes valve body, case and swinging boom, valve body and case on all opened the through-hole, the valve body assemble on the oil storage cylinder, the case is in the same place with the swinging boom equipment, drives the case rotation when the swinging boom rotates to when the swinging boom rotates different angles, the through-hole intercommunication of diameter variation in size on through-hole on the valve body and the case to realize the regulation of the damping force of different grades. The design realizes the adjustment of the damping force to a certain extent, but in the process of rotating the valve core, the valve core is not continuously communicated with the through hole on the valve body, the damping through hole is switched between opening and closing, the phenomenon of 'sudden opening and closing' is easily generated, the oil flow change is discontinuous, the damping force change is large, and the vehicle body is easy to generate severe vibration. In addition, the adjustment mode of manually rotating the rotating arm not only disperses the attention of a driver during driving, but also increases the space use requirement when the shock absorber is installed.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a damping adjusting valve for a vibration absorber and a method thereof, wherein the damping adjusting valve is used for adjusting the flow area of a damping through hole D and the opening force of a flow valve plate to realize twice adjustment of the damping force through an adjusting valve component and a piston valve component, and has the advantages of active control, stepless adjustable damping, high dynamic response speed, high automation degree, small installation space and the like.

The technical scheme of the invention is as follows: a damping regulating valve for a shock absorber comprises a regulating valve component, a piston valve component, a main valve core, a piston rod, a regulating valve limiting block, a working cylinder and a controller.

The regulating valve component, the piston valve component, the main valve core, the piston rod and the regulating valve limiting block are arranged in the working cylinder barrel; the regulating valve assembly comprises a regulating valve main body, an annular armature, a magnetism isolating ring, a regulating valve base, a flow valve plate, a first elastic part, a damping through hole D, an excitation coil, a sealing valve cover and a second elastic part; the piston valve assembly comprises a piston valve main body, a damping through hole A, a reset valve plate, a locking nut, a damping through hole B, a damping through hole C and a flow valve plate;

the regulating valve limiting block is arranged at the lower end of the piston rod, and an inner cavity at the lower end of the piston rod is connected with an outer cylindrical surface at the upper end of the main valve core; the main valve core sequentially penetrates through the regulating valve main body and the piston valve main body; the piston valve main body is in clearance fit with the working cylinder barrel; the regulating valve main body, the piston valve main body and the main valve core form coaxial clearance fit; the sealing valve cover and the magnetism isolating ring are arranged in the regulating valve main body, the sealing valve cover is positioned above the magnetism isolating ring, and the sealing valve cover and the magnetism isolating ring are coaxial with the main valve core; the excitation coil is packaged in an inner cavity at the lower end of the sealing valve cover and is positioned between the magnetism isolating ring and a journal at the upper end of the main valve core; the annular armature is packaged on the inner wall of the regulating valve main body and is in clearance fit with the outer cylindrical surface of the sealing valve cover and the magnetism isolating ring; the second elastic component is sleeved on the outer cylindrical surface of the upper end of the sealing valve cover, the upper end of the second elastic component is contacted with the upper end of the inner cavity of the regulating valve main body, and the lower end of the second elastic component is contacted with the groove of the outer cylindrical surface of the sealing valve cover; the regulating valve base is arranged at the upper part in the piston valve main body and forms coaxial clearance fit with the lower end of the main valve core; a longitudinal damping through hole A and a longitudinal damping through hole C are formed in the piston valve main body; the flow valve plate is positioned in the piston valve main body and sleeved at the lower end of the main valve core to form clearance fit, and the flow valve plate is matched with the damping through hole C to form adjustable damping force; the reset valve plate is positioned at the outer bottom of the piston valve main body and sleeved at the lower end of the main valve core to form clearance fit, and the reset valve plate is installed in a matched manner with the damping through hole A to form adjustable damping force; the first elastic component is sleeved on the outer cylindrical surface of the lower end of the main valve core, the upper end of the first elastic component is in contact with a groove at the lower end of the regulating valve base, and the lower end of the first elastic component is in contact with the flow valve plate; a transverse through hole at the lower end of the regulating valve main body is communicated with a transverse through hole at the middle section of the main shaft core to form a damping port D; the lower end of the spindle core is provided with a longitudinal through hole, and the longitudinal through hole is communicated with a transverse through hole to form a damping through hole B; the excitation coil is connected with the controller.

In the above scheme, the second elastic component is an adjusting spring.

In the above scheme, the first elastic member is a main spring.

In the scheme, a sealing ring A is arranged between the inner cavity at the upper end of the regulating valve main body and the outer cylindrical surface at the upper end of the sealing valve cover.

In the scheme, a sealing ring B is arranged between the inner cavity of the middle section of the regulating valve main body and the sealing valve cover; and a sealing ring B is also arranged between the inner cavity at the lower end of the regulating valve main body and the outer cylindrical surface of the middle section of the main valve core.

In the scheme, a sealing ring C is arranged between the inner cavity of the regulating valve base and the outer cylindrical surface of the lower end of the main valve core.

In the above scheme, a locking nut is arranged on the part of the lower end of the main valve core penetrating through the bottom of the piston valve main body.

A method of adjusting a damping adjustment valve for a shock absorber, comprising the steps of:

in a compression stroke or a recovery stroke, the controller energizes the magnet exciting coil, the annular armature drives the adjusting valve main body to move downwards with the increase of the working current of the magnet exciting coil, the flow area of the damping through hole D is gradually reduced, the recovery damping force and the compression damping force are increased, the first type of damping force is adopted, and the damping force and the current are changed in a direct proportion manner;

when the adjusting valve body moves downwards, the adjusting valve base is pushed to move downwards, the compression stroke of the first elastic component is increased, the elastic potential energy of the first elastic component is increased, the resistance to be overcome when the circulation valve plate is opened is increased, the compression damping force is further increased, the second damping force is used for adjusting, and the damping force and the current are changed in a direct ratio mode.

In the above scheme, the compression stroke specifically includes: when the piston rod moves downwards relative to the working cylinder barrel, the volume of the lower cavity of the working cylinder barrel is reduced, the oil pressure is increased, and oil flows into the upper cavity of the working cylinder barrel from the lower cavity of the working cylinder barrel through the damping through hole C, the circulation valve plate, the damping through hole B and the damping through hole D respectively to generate compression damping force.

In the above-mentioned scheme, the return stroke specifically is: when the piston rod moves upwards relative to the working cylinder barrel, the size of the upper cavity of the working cylinder barrel is reduced, the oil pressure is increased, and oil flows into the lower cavity of the working cylinder barrel from the upper cavity of the working cylinder barrel through the damping through hole A and the reset valve plate, the damping through hole B and the damping through hole D respectively to generate reset damping force.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention combines the regulating valve component and the piston valve component, realizes the twice regulation of the damping force by regulating the flow area of the damping through hole D and the opening force of the flow valve plate, and has the advantages of active control, stepless regulation of the damping, high dynamic response speed, high automation degree, small installation space and the like.

2. The invention combines an electric control system to drive the adjusting valve main body to move up and down by changing the working current of the excitation coil, thereby adjusting the flow area of the damping through hole D, further adjusting the restoring damping force and the compression damping force and finishing the first adjustment of the damping force. On one hand, the change of the flow area of the damping through hole D is continuous and stable, the defect that the damping force change is large and the vehicle body is easy to generate severe vibration due to the fact that the oil changes discontinuously because the 'sudden opening and closing' phenomenon is caused by the fact that the damping through holes on the valve body and the valve core are switched between the switches in the damping adjusting unit in the prior art is effectively overcome, and stepless damping adjustment is achieved; on the other hand, the characteristic that the damping force is changed in direct proportion to the current in the invention is utilized, so that the change of the damping force can be accurately controlled.

3. Aiming at the defects that the adjustment trends of the rebound damping force and the compression damping force are consistent, but the two damping forces have relatively fixed magnitude relation and cannot be adjusted according to actual road conditions in the prior art, the invention designs a second damping force adjusting mode, wherein the adjusting valve main body moves downwards and simultaneously pushes the adjusting valve base to move downwards, the compression amount of a main spring is increased, the elastic potential energy of the main spring is increased, the force to be overcome when the flow valve plate is opened is increased, and the compression damping force is further increased. On one hand, when the excitation coil is electrified, the damping adjusting valve can perform secondary damping adjustment on the compression damping force on the basis of primary damping force adjustment; on the other hand, the condition that the relationship between the restoring damping force and the compression damping force is not adjustable in the prior art is effectively improved, and the relationship between the restoring damping force and the compression damping force can be further adjusted according to the requirements of actual working conditions.

4. The damping device has the advantages of smaller installation space and high dynamic response speed, can realize the bidirectional control of the damping force of the compression stroke and the recovery stroke, has larger damping force adjusting range and high automation degree when the diameter of the damping through hole D and the compression stroke of the adjusting spring and the main spring are larger, and can be controlled by combining various semi-active suspension control strategies.

Drawings

FIG. 1 is a sectional view showing the overall construction of a damper adjusting valve for a shock absorber according to the present invention;

FIG. 2 is a sectional view of the main valve core of the damper regulator valve for a shock absorber according to the present invention;

FIG. 3 is a sectional view showing the structure of a damper valve body of the damper regulator valve for a shock absorber according to the present invention;

FIG. 4 is a sectional view showing the construction of a piston valve body of a damper adjustment valve for a shock absorber according to the present invention;

FIG. 5 is a hydraulic flow diagram of a damping control valve for a shock absorber during a compression stroke when an electromagnetic valve is not opened according to the present invention;

FIG. 6 is a return stroke oil flow diagram of the damping control valve for the shock absorber when the electromagnetic valve is not opened according to the present invention;

FIG. 7 is a hydraulic flow diagram of a damping control valve for a shock absorber in a compression stroke when an electromagnetic valve is opened according to the present invention;

fig. 8 is a hydraulic flow diagram of a damping control valve for a shock absorber according to the present invention in a return stroke when a solenoid valve is opened.

Wherein, 1-main valve core; 2-sealing ring A; 3-regulating valve body; 4-a ring armature; 5-isolating magnetic ring; 6-sealing ring B; 7-sealing ring C; 8-adjusting the valve base; 9-a piston valve body; 10-damping through hole a; 11-a reset valve plate; 12-a working cylinder; 13-a locking nut; 14-damping through hole B; 15-damping via C; 16-a flow-through valve plate; 17-a main spring; 18-damping via D; 19-a field coil; 20-sealing the valve cover; 21-adjusting the spring; 22-a regulator valve stop; 23-piston rod.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the figures, which are based on the orientation or positional relationship shown in the figures, and are used for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1-4, a preferred embodiment of the damping control valve for a shock absorber includes a control valve assembly, a piston valve assembly, a main valve element 1, a piston rod 23, a control valve stopper 22, a working cylinder 12, and a controller.

The regulating valve component, the piston valve component, the main valve element 1, the piston rod 23 and the regulating valve limiting block 22 are arranged in the working cylinder 12.

The regulating valve assembly comprises a sealing ring A2, a regulating valve main body 3, a ring-shaped armature 4, a magnetism isolating ring 5, a sealing ring B6, a sealing ring C7, a regulating valve base 8, a flow valve plate 16, a main spring 17, a damping through hole D18, an excitation coil 19, a sealing valve cover 20 and a regulating spring 21.

The piston valve assembly comprises a piston valve main body 9, a damping through hole A10, a recovery valve plate 11, a locking nut 13, a damping through hole B14, a damping through hole C15 and a flow valve plate 16.

The regulating valve limiting block 22 is welded at the lower end of a piston rod 23, an inner cavity at the lower end of the piston rod 23 is in threaded connection with an outer cylindrical surface at the upper end of the main valve element 1, and the main valve element 1 sequentially penetrates through the regulating valve main body 3 and the piston valve main body 9; the piston valve main body 9 is in clearance fit with the working cylinder 12 through a rubber sealing ring sleeve; the regulating valve main body 3, the piston valve main body 9 and the main valve core 1 form coaxial clearance fit; the sealing valve cover 20 and the main valve core 1 form a coaxial transition fit, the annular armature 4 is packaged between the inner cavity of the regulating valve main body 3 and the outer cylindrical surface of the sealing valve cover 20 and the magnetism isolating ring 5, the regulating spring 21 is sleeved on the outer cylindrical surface of the upper end of the sealing valve cover 20, and the upper end and the lower end of the regulating spring are respectively pressed and attached to the grooves of the inner cavity of the regulating valve main body 3 and the outer cylindrical surface of the sealing valve cover 20; the regulating valve base 8 and the lower end of the main valve core 1 form coaxial clearance fit, and a longitudinal damping through hole A10 and a damping through hole C15 are arranged in the piston valve main body 9; the flow valve plate 16, the piston valve body 9 and the reset valve plate 11 are sequentially sleeved at the lower end of the main valve core 1 to form clearance fit and are fixed through the locking nut 13. The flow valve plate 16 is matched and mounted with the damping through hole C15 to form adjustable damping force; the reset valve plate 11 is matched with the damping through hole A10 to form adjustable damping force; the main spring 17 is sleeved on the outer cylindrical surface of the lower end of the main valve core 1, and the upper end and the lower end of the main spring are respectively tightly pressed and attached with the groove at the lower end of the regulating valve base 8 and the flow valve plate 16; a damping port D18 is formed by the transverse through hole at the lower end of the regulating valve main body 3 and the transverse through hole at the middle section of the spindle core 1; the lower end of the spindle core 1 is provided with a longitudinal through hole, and the longitudinal through hole is communicated with a transverse through hole to form a damping through hole B14; the excitation coil 19 is encapsulated in the cavity at the lower end of the sealing valve cover 20, between the magnetism isolating ring 5 and the journal at the upper end of the main valve element 1; a sealing ring A2 is arranged between the inner cavity at the upper end of the regulating valve main body 3 and the outer cylindrical surface at the upper end of the sealing valve cover 20; sealing rings B6 are respectively arranged between the inner cavities of the middle section and the lower end of the regulating valve body 3 and the outer cylindrical surfaces of the lower end of the sealing valve cover 20 and the middle section of the main valve core 1; and a sealing ring C7 is arranged between the inner cavity of the regulating valve base 8 and the outer cylindrical surface of the lower end of the main valve element 1. The piston rod 23 drives the whole damping adjusting valve assembly to move up and down, and the magnet exciting coil 19 is connected with the controller ECU through an external circuit.

in a compression stroke or a recovery stroke, the controller energizes the magnet exciting coil 19, as the working current of the magnet exciting coil 19 increases, the displacement of the annular armature 4 driving the regulating valve main body 3 to move downwards increases, the flow area of the damping through hole D18 gradually decreases, the recovery damping force and the compression damping force both increase, which is the first damping force adjustment, and the damping force and the current both change in proportion;

when the regulating valve main body 3 moves downwards, the regulating valve base 8 is pushed to move downwards, the compression stroke of the first elastic part is increased, the elastic potential energy of the first elastic part is increased, so that the resistance to be overcome when the flow valve plate 16 is opened is increased, the compression damping force is further increased, the second type of damping force is used for regulating, and the damping force and the current are changed in a direct proportion manner.

The compression stroke specifically comprises: when the piston rod 23 moves downward relative to the working cylinder 12, the volume of the lower cavity of the working cylinder 12 is reduced, the oil pressure is increased, and oil flows from the lower cavity of the working cylinder 12 to the upper cavity of the working cylinder 12 through the damping through hole C15, the flow valve plate 16, the damping through hole B14 and the damping through hole D18 respectively to generate a compression damping force.

The recovery stroke specifically comprises: when the piston rod 23 moves upward relative to the working cylinder 12, the volume of the upper cavity of the working cylinder 12 is reduced, the oil pressure is increased, and oil flows from the upper cavity of the working cylinder 12, respectively flows into the lower cavity of the working cylinder 12 through the damping through hole A10, the rebound valve plate 11, the damping through hole B14 and the damping through hole D18, so as to generate rebound damping force.

As shown in fig. 5, a compression stroke oil flow diagram of the damper damping control valve for a shock absorber when the solenoid valve is not opened, and fig. 6 is a recovery stroke oil flow diagram of the damper damping control valve for a shock absorber when the solenoid valve is not opened, in which the overlap area of the lateral through hole at the lower end of the control valve body 3 and the opening of the lateral through hole at the middle section of the main shaft core 1 is the largest, the flow area of the damping through hole D18 formed by the lateral through hole and the opening of the lateral through hole is the largest, and the compression stroke of the main spring 17 is the smallest, and at this time, the recovery damping force and the compression damping force are the smallest. FIG. 7 is a hydraulic flow diagram of a damping control valve for a shock absorber in a compression stroke when an electromagnetic valve is opened; FIG. 8 is a flow diagram of oil in a recovery stroke when a damping regulating valve for a shock absorber is opened; according to the requirement of the actual working condition of the vehicle, when the controller ECU energizes the excitation coil 19, the controller ECU attracts the annular armature 4 to drive the regulating valve main body 3 to move downwards, the flow area of the damping through hole D18 is gradually reduced, and the restoring damping force and the compression damping force are gradually increased; meanwhile, the lower end of the regulating valve main body 3 pushes the regulating valve base 8 to move downwards, the main spring 17 is further compressed, resistance required to be overcome when the circulation valve plate 16 is opened is increased, compression damping force is further increased, two times of damping stepless regulation of the shock absorber damping regulating valve are finally achieved, and the damping force and the current are changed in a direct ratio mode.

It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A damping regulating valve for a shock absorber is characterized by comprising a regulating valve component, a piston valve component, a main valve core (1), a piston rod (23), a regulating valve limiting block (22), a working cylinder (12) and a controller;

the regulating valve component, the piston valve component, the main valve core (1), the piston rod (23) and the regulating valve limiting block (22) are arranged in the working cylinder barrel (12); the regulating valve component comprises a regulating valve main body (3), an annular armature (4), a magnetism isolating ring (5), a regulating valve base (8), a first elastic part, a damping through hole D (18), a magnet exciting coil (19), a sealing valve cover (20) and a second elastic part; the piston valve assembly comprises a piston valve main body (9), a damping through hole A (10), a reset valve plate (11), a locking nut (13), a damping through hole B (14), a damping through hole C (15) and a flow valve plate (16);

the regulating valve limiting block (22) is arranged at the lower end of a piston rod (23), and an inner cavity at the lower end of the piston rod (23) is connected with an outer cylindrical surface at the upper end of the main valve core (1); the main valve core (1) sequentially penetrates through the regulating valve main body (3) and the piston valve main body (9); the piston valve main body (9) is in clearance fit with the working cylinder barrel (12); the regulating valve main body (3), the piston valve main body (9) and the main valve core (1) form coaxial clearance fit; the sealing valve cover (20) and the magnetism isolating ring (5) are arranged in the regulating valve main body (3), the sealing valve cover (20) is positioned above the magnetism isolating ring (5), and the sealing valve cover (20) and the magnetism isolating ring (5) are coaxial with the main valve core (1); the excitation coil (19) is packaged in an inner cavity at the lower end of the sealing valve cover (20) and is positioned between the magnetism isolating ring (5) and a journal at the upper end of the main valve core (1); the annular armature iron (4) is packaged on the inner wall of the regulating valve main body (3) and is in clearance fit with the outer cylindrical surfaces of the sealing valve cover (20) and the magnetism isolating ring (5); the second elastic component is sleeved on the outer cylindrical surface of the upper end of the sealing valve cover (20), the upper end of the second elastic component is contacted with the upper end of the inner cavity of the regulating valve main body (3), and the lower end of the second elastic component is contacted with the groove of the outer cylindrical surface of the sealing valve cover (20); the regulating valve base (8) is arranged at the upper part in the piston valve main body (9), and the regulating valve base (8) is in coaxial clearance fit with the lower end of the main valve core (1); the regulating valve main body (3) moves downwards and pushes the regulating valve base (8) to move downwards at the same time; a longitudinal damping through hole A (10) and a longitudinal damping through hole C (15) are formed in the piston valve main body (9); the flow valve plate (16) is positioned in the piston valve main body (9) and sleeved at the lower end of the main valve core (1) to form clearance fit, and the flow valve plate (16) is installed in a matched manner with the damping through hole C (15) to form adjustable damping force; the reset valve plate (11) is positioned at the outer bottom of the piston valve main body (9) and sleeved at the lower end of the main valve core (1) to form clearance fit, and the reset valve plate (11) is installed with the damping through hole A (10) in a matched mode to form adjustable damping force; the first elastic component is sleeved on the outer cylindrical surface of the lower end of the main valve core (1), the upper end of the first elastic component is in contact with a groove at the lower end of the regulating valve base (8), and the lower end of the first elastic component is in contact with the flow valve plate (16); a transverse through hole at the lower end of the regulating valve main body (3) is communicated with a transverse through hole at the middle section of the main valve core (1) to form a damping through hole D (18); the lower end of the main valve core (1) is provided with a longitudinal through hole, and the longitudinal through hole is communicated with a transverse through hole to form a damping through hole B (14); the excitation coil (19) is connected with a controller.

2. The damper modulation valve for a shock absorber according to claim 1, wherein the second elastic member is a modulation spring (21).

3. The damper regulator valve for shock absorbers according to claim 1, wherein the first elastic member is a main spring (17).

4. The damper regulating valve for shock absorbers according to claim 1, wherein a seal ring a (2) is provided between the inner chamber at the upper end of the regulating valve body (3) and the outer cylindrical surface at the upper end of the seal valve cover (20).

5. The damping adjusting valve for the shock absorber as recited in claim 1, wherein a sealing ring B (6) is arranged between the middle section inner cavity of the adjusting valve main body (3) and the sealing valve cover (20); a sealing ring B (6) is also arranged between the inner cavity at the lower end of the regulating valve main body (3) and the outer cylindrical surface of the middle section of the main valve core (1).

6. The damper regulating valve for vibration dampers according to claim 1, wherein a sealing ring C (7) is arranged between the inner cavity of the regulating valve base (8) and the outer cylindrical surface of the lower end of the main valve element (1).

7. The damper regulator valve for shock absorbers according to claim 1, wherein a lock nut (13) is provided to a portion of the lower end of the main spool (1) penetrating the bottom of the piston valve body (9).

8. A method of adjusting a damping adjustment valve for a shock absorber according to any of claims 1 to 7, comprising the steps of:

in a compression stroke or a recovery stroke, the controller energizes the magnet exciting coil (19), along with the increase of working current of the magnet exciting coil (19), the displacement of the downward movement of the regulating valve main body (3) driven by the annular armature (4) is increased, the flow area of the damping through hole D (18) is gradually reduced, the recovery damping force and the compression damping force are increased, the first damping force is adjusted, and the damping force and the current are changed in a direct proportion manner;

the compression stroke of the first elastic component is increased, the elastic potential energy of the first elastic component is increased, so that the resistance to be overcome when the flow valve plate (16) is opened is increased, the compression damping force is further increased, the second damping force is used for adjusting, and the damping force and the current are changed in a direct ratio.

9. The adjusting method of the damping adjusting valve for the shock absorber as recited in claim 8, wherein the compression stroke is specifically: when the piston rod (23) moves downwards relative to the working cylinder barrel (12), the volume of the lower cavity of the working cylinder barrel (12) is reduced, the oil pressure is increased, and oil flows from the lower cavity of the working cylinder barrel (12) through the damping through hole C (15), the circulation valve plate (16), the damping through hole B (14) and the damping through hole D (18) and flows into the upper cavity of the working cylinder barrel (12) to generate compression damping force.

10. The method for adjusting a damping adjustment valve for a shock absorber according to claim 8, wherein the return stroke is specifically: when the piston rod (23) moves upwards relative to the working cylinder barrel (12), the volume of the upper cavity of the working cylinder barrel (12) is reduced, the oil pressure is increased, and oil flows from the upper cavity of the working cylinder barrel (12) to the lower cavity of the working cylinder barrel (12) through the damping through hole A (10), the rebound valve plate (11), the damping through hole B (14) and the damping through hole D (18) respectively to generate rebound damping force.