A method and system for analyzing faults of an electronically controlled shock absorber

Abstract

The present invention relates to the technical field of electronically controlled shock absorbers, and in particular to a method and system for analyzing faults of electronically controlled shock absorbers. The method for analyzing faults of electronically controlled shock absorbers comprises: step S10, based on the first working curve of the electronically controlled shock absorber being outside the first standard area, separating the electromagnetic valve body from the shock absorbing assembly; step S20, based on the separation of the electromagnetic valve body from the shock absorbing assembly, driving the electronically controlled shock absorber fault analysis system to enter the first matching state; step S30, based on the electronically controlled shock absorber fault analysis system entering the first matching state, causing the piston rod to drive the restoration unit to reciprocate, and obtaining the second working curve of the electronically controlled shock absorber; step S40, based on the second working curve being within the second standard area, obtaining the first fault information of the electronically controlled shock absorber. This solves the problem of difficulty in analyzing faults of electronically controlled shock absorbers.

Description

Technical Field

[0001] The present invention relates to the technical field of electronically controlled shock absorbers, and in particular to a fault analysis method and system for electronically controlled shock absorbers. Background Art

[0002] Damping performance is one of the most critical characteristics of electronically controlled shock absorbers, which directly affects the comfort and handling of the vehicle. The damping performance of the semi-active electronically controlled shock absorber with external solenoid valve is determined by the passive valve system (restoration valve system, compression valve system) and the solenoid valve. Abnormalities in the passive valve system or the solenoid valve can lead to abnormal damping force of the electronically controlled shock absorber. During the damping force adjustment process of the semi-active electronically controlled shock absorber and the production process, it is usually necessary to ensure that there is no abnormality in the passive valve system before proceeding to the next step.

[0003] The damping electronically controlled shock absorber usually adopts a normally open solenoid valve. The opening and closing degree of the solenoid valve decreases with increasing current. To analyze whether the passive valve system is normal, the solenoid valve needs to be kept in a closed state to eliminate the interference of the solenoid valve. Therefore, a large current needs to be applied to the solenoid valve. At the same time, if the test time is too long, it is easy to cause the solenoid valve coil to overheat and burn, and the passive valve system cannot be tested. Summary of the invention

[0004] In order to solve the problem of difficulty in fault analysis of an electronically controlled shock absorber, the present invention provides a fault analysis method and system for an electronically controlled shock absorber.

[0005] In a first aspect, the present invention provides a method for analyzing a fault of an electronically controlled shock absorber, the method comprising:

[0006] Step S10, based on the first working curve of the electronically controlled shock absorber being outside the first standard area, the electromagnetic valve body is separated from the shock absorbing assembly; wherein the electronically controlled shock absorber comprises a shock absorbing assembly, a tooling assembly, and an electromagnetic valve body; the shock absorbing assembly comprises a shock absorbing cylinder, a piston rod, a compression unit, a recovery unit, and a base unit; the shock absorbing cylinder comprises an inner cylinder, a middle cylinder, an outer cylinder, a first through hole, a second through hole, and a cylinder cover; one end of the outer cylinder is detachably connected to the cylinder cover; the inner circumferential wall of the outer cylinder and one side of the cylinder cover surround to form an outer chamber; one end of the inner cylinder is detachably connected to the cylinder cover, and the other end of the inner cylinder is detachably connected to the compression unit; the inner cylinder is located in the outer chamber; the inner circumferential wall of the inner cylinder, one side of the cylinder cover, and one side of the compression unit surround to form an inner chamber; the middle cylinder is detachably connected to the inner cylinder; the middle cylinder is arranged between the inner cylinder and the outer cylinder; the inner circumferential wall of the middle cylinder and part of the outer circumferential wall of the inner cylinder surround to form a middle chamber; the electromagnetic valve body is detachably connected to the base unit;

[0007] Step S20, based on the separation of the electromagnetic valve body and the shock absorbing assembly, driving the electronically controlled shock absorber fault analysis system to enter a first matching state; wherein the first matching state includes the separation of the electromagnetic valve body and the base unit, the tooling assembly and the base unit are detachably connected, and the tooling assembly separates the middle chamber from the outer chamber;

[0008] Step S30, based on the electronically controlled shock absorber fault analysis system entering the first matching state, the piston rod drives the restoration unit to reciprocate, and obtains a second working curve of the electronically controlled shock absorber;

[0009] Step S40, based on the second working curve being within a second standard area, obtaining first fault information of the electronically controlled shock absorber; wherein the first fault information of the electronically controlled shock absorber includes that the compression unit and the restoration unit are normal, and the solenoid valve body is abnormal.

[0010] In some embodiments, the tooling assembly in step S20 that separates the middle chamber from the outer chamber includes a first movable unit whose outer circumferential wall is detachably connected to the inner circumferential wall of the solenoid valve cylinder, an inner rod passes through the solenoid valve seat, and an end of the second movable unit close to the solenoid valve seat is abutted against the solenoid valve seat; wherein the base unit includes a solenoid valve cylinder and a solenoid valve seat; the tooling assembly includes a first movable unit, a second movable unit, and a first positioning unit; the inner circumferential wall of the first movable unit is slidably connected to the outer circumferential wall of the second movable unit; the first positioning unit includes an inner rod; and the inner rod is slidably connected to the inner circumferential wall of the second movable unit.

[0011] In some embodiments, step S20 includes:

[0012] Step S21, based on the separation of the solenoid valve body and the shock absorbing assembly, the outer peripheral wall of the first movable unit is detachably connected to the inner peripheral wall of the solenoid valve cylinder; wherein the tooling assembly includes a first movable unit, a second movable unit, a first positioning unit, and a second positioning unit; the base unit includes a solenoid valve cylinder, a solenoid valve seat, and a first sealing module; the solenoid valve seat is detachably connected to the outer peripheral wall of the middle cylinder around the second through hole; the solenoid valve cylinder is fixedly connected to the outer peripheral wall of the outer cylinder around the second through hole;

[0013] Step S22, based on the detachable connection between the outer circumferential wall of the first movable unit and the inner circumferential wall of the solenoid valve cylinder, the second movable unit moves along the inner circumferential wall of the first movable unit toward the solenoid valve seat; wherein the second movable unit includes a second movable module and a gasket, and the second movable module includes a movable tube body and a movable column; the gasket is divided into different specifications according to thickness;

[0014] Step S23, based on the end of the movable tube body close to the solenoid valve seat abutting against the solenoid valve seat, the electronically controlled shock absorber fault analysis system enters a second matching state; wherein the second matching state includes that the outer peripheral wall of the first movable unit is detachably connected to the inner peripheral wall of the solenoid valve cylinder, the end surface of one end of the gasket abuts against the end surface of one end of the movable tube body away from the solenoid valve seat, and the difference between the distance from the side of the gasket away from the movable tube body to the solenoid valve seat and the distance from the end of the first movable unit away from the solenoid valve seat to the solenoid valve seat is within a set range;

[0015] Step S24, based on the electronically controlled shock absorber fault analysis system entering the second matching state, the first positioning unit is moved along the inner peripheral wall of the movable tube body toward the electromagnetic valve seat; wherein the first positioning unit includes a first end cover and an inner rod; the first end cover is detachably connected to the inner rod;

[0016] Step S25, based on the first end cover abutting against the side of the gasket close to the first end cover, and the outer peripheral wall of one end of the inner rod close to the electromagnetic valve seat abutting against the inner peripheral wall of the electromagnetic valve seat, the first end cover is detachably connected to the first movable unit, and the spring is sleeved on the movable column;

[0017] Step S26, based on the detachable connection between the first end cover and the first movable unit and the spring being sleeved on the movable column, the second end cover is detachably connected to the movable column; wherein, when the second end cover and the movable column are in a detachable connection state, the length of the spring is compressed;

[0018] Step S27: based on the detachable connection between the second end cover and the movable column, the electronically controlled shock absorber fault analysis system enters a first matching state.

[0019] In some embodiments, the electronically controlled shock absorber fault analysis method further includes:

[0020] Step S50: acquiring second fault information of the electronically controlled shock absorber based on the second working curve being outside the second standard area; wherein the second fault information includes abnormalities of the compression unit and the restoration unit.

[0021] In some embodiments, the electronically controlled shock absorber fault analysis method further includes:

[0022] Step S60: Based on the second fault information of the electronically controlled shock absorber, detecting whether the solenoid valve body is normal.

[0023] In a second aspect, the present invention provides an electronically controlled shock absorber fault analysis system, the electronically controlled shock absorber fault analysis system is applied to an electronically controlled shock absorber fault analysis method of any of the above embodiments, the electronically controlled shock absorber fault analysis system comprising:

[0024] The shock-absorbing assembly comprises a shock-absorbing cylinder, a piston rod, a compression unit, a recovery unit, and a base unit; the shock-absorbing cylinder comprises an inner cylinder, a middle cylinder, an outer cylinder, a first through hole, a second through hole, and a cylinder cover; one end of the outer cylinder is detachably connected to the cylinder cover; the inner circumferential wall of the outer cylinder and one side of the cylinder cover surround an outer chamber; one end of the inner cylinder is detachably connected to the cylinder cover, and the other end of the inner cylinder is detachably connected to the compression unit; the inner cylinder is located in the outer chamber; the inner circumferential wall of the inner cylinder, one side of the cylinder cover, and one side of the compression unit surround an inner chamber; the middle cylinder is detachably connected to the inner cylinder; the middle cylinder is arranged between the inner cylinder and the outer cylinder; the inner circumferential wall of the middle cylinder and part of the outer circumferential wall of the inner cylinder surround a middle chamber; the first through hole passes through the side wall of the inner cylinder; the first through hole connects the inner chamber with the middle The cam is connected to the piston rod and the piston rod is slidably connected to the cylinder cover; one end of the piston rod is detachably connected to the recovery unit; the recovery unit is located in the inner chamber; the recovery unit is slidably connected to the side wall of the inner cylinder; the recovery unit divides the inner chamber into two parts; wherein the inner chamber located on the side of the recovery unit close to the cylinder cover is the upper inner chamber, and the inner chamber located on the side of the recovery unit away from the cylinder cover is the lower inner chamber; the base unit comprises an electromagnetic valve cylinder and an electromagnetic valve seat; the electromagnetic valve seat is detachably connected to the outer peripheral wall of the middle cylinder around the second through hole; the electromagnetic valve cylinder is fixedly connected to the outer peripheral wall of the outer cylinder around the second through hole;

[0025] Tooling components;

[0026] Solenoid valve body;

[0027] A power assembly, the power assembly is drivingly connected to the piston rod;

[0028] A detection component, wherein the detection component obtains force, speed, and displacement parameters of the piston rod during movement;

[0029] The electronically controlled shock absorber fault analysis system includes a first mating state and a third mating state; the first mating state includes the solenoid valve body being separated from the base unit, the tooling assembly being detachably connected to the base unit, and the tooling assembly separating the middle chamber from the outer chamber; the third mating state includes the tooling assembly being separated from the base unit, the solenoid valve body being detachably connected to the base unit, and the solenoid valve body controlling the flow at the second through hole.

[0030] In some embodiments, the compression unit includes a compression valve body, a first throttle hole, and a second throttle hole; the first throttle hole passes through the compression valve body, and the second throttle hole passes through the compression valve body; the first throttle hole connects the lower inner chamber with the outer chamber, and the second throttle hole connects the lower inner chamber with the outer chamber; the recovery unit includes a recovery valve body, a third throttle hole, and a fourth throttle hole; the third throttle hole passes through the recovery valve body, and the fourth throttle hole passes through the recovery valve body; the third throttle hole connects the upper inner chamber with the lower inner chamber, and the fourth throttle hole connects the upper inner chamber with the lower inner chamber; the piston rod and The restoration valve body is detachably connected; the electronically controlled shock absorber fault analysis system includes a compression stage and a restoration stage; the compression stage includes the piston rod driving the restoration unit to move in the inner chamber along the axial direction toward the compression unit, the first throttle hole and the fourth throttle hole are in a conducting state, and the second throttle hole and the third throttle hole are in a closed state; the restoration stage includes the piston rod driving the restoration unit to move in the inner chamber along the axial direction toward the compression unit, the second throttle hole and the third throttle hole are in a conducting state, and the first throttle hole and the fourth throttle hole are in a closed state.

[0031] In some embodiments, the tooling assembly includes a first movable unit, a second movable unit, a first positioning unit, and a second positioning unit; the first movable unit includes a first movable module and a second sealing module; the second sealing module is arranged in an annular shape; the second sealing module is arranged circumferentially along the outer peripheral wall of the first movable module; the second movable unit includes a second movable module, a third sealing module, and a fourth sealing module; the second movable module includes a movable tube body and a movable column; the movable column is fixedly connected to one end of the movable tube body; the outer circumference of the movable tube body matches the inner circumference of the first movable module; the outer peripheral wall of the movable tube body is slidably connected to the inner peripheral wall of the first movable module; the third sealing module and the fourth sealing module are both arranged in an annular shape; the third sealing module is arranged circumferentially along the outer peripheral wall of the movable tube body; the fourth sealing module is arranged circumferentially along the inner peripheral wall of the movable tube body; the first positioning unit includes a first end cover and an inner rod; the first end cover includes an end cover body, an end cover center The second positioning unit comprises a second end cap and a spring; the diameter of the spring matches the diameter of the movable cylinder; the spring is sleeved on the movable cylinder; the second end cap is detachably connected to the movable cylinder; one end of the spring abuts against the first end cap, and the other end abuts against the second end cap; wherein, when the second end cap and the movable cylinder are in a detachable connection state, the length of the spring is compressed; the first matching state also includes that the outer peripheral wall of the first movable module is detachably connected to the inner peripheral wall of the electromagnetic valve cylinder; one end of the inner rod is slidably connected to the inner peripheral wall of the electromagnetic valve seat; the end of the movable cylinder close to the electromagnetic valve seat abuts against the electromagnetic valve seat.

[0032] In some embodiments, the base unit also includes a first sealing module; the first sealing module is set to be annular; the first sealing module is located on the side of the solenoid valve seat away from the middle cylinder; the solenoid valve cylinder includes a first cylinder, a second cylinder, and a third cylinder; the first cylinder, the second cylinder, and the third cylinder are fixedly connected in sequence; the inner diameters of the first cylinder, the second cylinder, and the third cylinder increase in sequence; the first cylinder is fixedly connected to the outer circumferential wall of the outer cylinder around the second through hole; the first movable module includes a first positioning ring, a second positioning ring, and a third positioning ring; the first positioning ring, the second positioning ring, and the third positioning ring are fixedly connected in sequence; the first matching state also includes the outer circumferential wall of the first positioning ring being spaced apart from the inner circumferential wall of the first cylinder, the outer circumferential wall of the second positioning ring abutting against the inner circumferential wall of the second cylinder, and the outer circumferential wall of the third positioning ring being detachably connected to the inner circumferential wall of the third cylinder; the third matching state also includes the end of the solenoid valve body close to the solenoid valve seat abutting against the solenoid valve seat, and the solenoid valve body is detachably connected to the inner circumferential wall of the first cylinder.

[0033] In some embodiments, the second movable unit also includes a gasket; the electronically controlled shock absorber fault analysis system includes a second mating state; the second mating state includes: the outer peripheral wall of the first movable unit is detachably connected to the inner peripheral wall of the solenoid valve tube, an end face of one end of the gasket abuts against an end face of the movable tube body away from the solenoid valve seat, and the difference between the distance from the side of the gasket away from the movable tube body to the solenoid valve seat and the distance from the end of the first movable unit away from the solenoid valve seat to the solenoid valve seat is within a set range.

[0034] In order to solve the problem of difficulty in fault analysis of electronically controlled shock absorbers, the present invention has the following advantages:

[0035] When the first working curve of the electronically controlled shock absorber is outside the first standard area, it proves that the electronically controlled shock absorber has a fault. In order to avoid the influence of the electromagnetic valve body, a tooling assembly is used to replace the electromagnetic valve body to block the middle chamber and the outer chamber. Compared with increasing the current passing through the electromagnetic valve body to close the electromagnetic valve body, it can effectively avoid damage to the electromagnetic valve body during the test. When the tooling assembly and the shock absorbing assembly enter the first matching state, the piston rod drives the recovery unit to reciprocate to obtain the second working curve of the electronically controlled shock absorber. When the second working curve is within the second standard area, it can be determined that the compression unit and the recovery unit are normal, while the electromagnetic valve body is abnormal. By using the tooling assembly to replace the electromagnetic valve body for testing, not only can the internal coil of the electromagnetic valve body be avoided from burning due to long-term high-current testing, but also the cause of the abnormal damping force value of the electronically controlled shock absorber can be accurately analyzed, that is, the compression unit, the recovery unit or the electromagnetic valve body is faulty, thereby improving the efficiency and accuracy of the electronically controlled shock absorber fault analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of a method for analyzing a fault of an electronically controlled shock absorber according to an embodiment is shown;

[0037] Figure 2 A schematic diagram of a third coordination state of an electronically controlled shock absorber fault analysis system according to an embodiment is shown;

[0038] Figure 3 A schematic diagram of a first matching state of an electronically controlled shock absorber fault analysis system according to an embodiment is shown;

[0039] Figure 4 A schematic diagram of a first matching state of an electronically controlled shock absorber fault analysis system according to another embodiment is shown;

[0040] Figure 5 A partial schematic diagram of an electronically controlled shock absorber fault analysis system according to an embodiment is shown;

[0041] Figure 6 An embodiment of the invention is shown Figure 2 A partial enlarged schematic diagram of the circled area;

[0042] Figure 7 A schematic diagram of a second activity module of an embodiment is shown;

[0043] Figure 8 A schematic diagram of a first end cap of an embodiment is shown;

[0044] Fig. 9 A schematic diagram of a gasket according to an embodiment is shown.

[0045] Reference numerals: 10 shock-absorbing assembly; 11 shock-absorbing cylinder; 111 inner cylinder; 112 first through hole; 113 middle cylinder; 114 second through hole; 115 outer cylinder; 116 cylinder cover; 12 piston rod; 13 compression unit; 131 compression valve body; 132 first throttle hole; 133 second throttle hole; 14 recovery unit; 141 recovery valve body; 142 third throttle hole; 143 fourth throttle hole; 15 base unit; 151 solenoid valve cylinder; 1511 first cylinder; 1512 second cylinder; 1513 third cylinder; 152 solenoid valve seat; 153 first sealing module; 20 tooling assembly; 21 The first movable unit; 211 the first movable module; 2111 the first positioning ring; 2112 the second positioning ring; 2113 the third positioning ring; 212 the second sealing module; 22 the second movable unit; 221 the second movable module; 2211 the movable tube body; 2212 the movable column; 222 the third sealing module; 223 the fourth sealing module; 224 the gasket; 23 the first positioning unit; 231 the first end cover; 2311 the end cover body; 2312 the end cover center hole; 2313 the end cover circumferential hole; 232 the inner rod; 24 the second positioning unit; 241 the second end cover; 242 the spring; 30 the solenoid valve body. DETAILED DESCRIPTION

[0046] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0047] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0048] In this embodiment, during the fault analysis of the electronically controlled shock absorber, since the normally open solenoid valve body 30 needs to remain in a closed state during the test, on the one hand, a large current needs to be applied to the solenoid valve body 30, and on the other hand, it is difficult for the solenoid valve body 30 to reach a completely closed state. Long-term high-current testing will also cause the solenoid valve body 30 coil to overheat, and there is a risk of the coil burning out. This not only increases the cost of the test, but also may make it impossible to accurately determine whether there is an abnormality in the passive valve system due to test interruption. Therefore, how to perform fault analysis on the damping electronically controlled shock absorber without applying excessive current to the solenoid valve body 30 and avoiding overheating and burning of the coil has become an urgent problem to be solved in the field of electronically controlled shock absorber technology. Among them, the electronically controlled shock absorber fault analysis system may include an electronically controlled shock absorber, a power assembly, and a detection assembly. The electronically controlled shock absorber may include a shock absorbing assembly 10, a tooling assembly 20, and a solenoid valve body 30. The shock absorbing assembly 10 may include a shock absorbing cylinder 11, a piston rod 12, a compression unit 13, a recovery unit 14, and a base unit 15. As Figure 2 , Figure 6 As shown, the shock-absorbing cylinder 11 may include an inner cylinder 111, a middle cylinder 113, an outer cylinder 115, a first through hole 112, a second through hole 114, and a cylinder cover 116. One end of the outer cylinder 115 may be detachably connected to the cylinder cover 116. The inner circumferential wall of the outer cylinder 115 may surround one side of the cylinder cover 116 to form an outer chamber. One end of the inner cylinder 111 may be detachably connected to the cylinder cover 116, and the other end of the inner cylinder 111 may be detachably connected to the compression unit 13. The inner cylinder 111 is located in the outer chamber. The inner circumferential wall of the inner cylinder 111, one side of the cylinder cover 116, and one side of the compression unit 13 may surround to form an inner chamber. The middle cylinder 113 may be detachably connected to the inner cylinder 111. The middle cylinder 113 may be arranged between the inner cylinder 111 and the outer cylinder 115. The inner circumferential wall of the middle cylinder 113 and part of the outer circumferential wall of the inner cylinder 111 may surround to form a middle chamber. The first through hole 112 can connect the inner chamber and the middle chamber, and the second through hole 114 can connect the middle chamber and the outer chamber. The base unit 15 can be arranged at the second through hole 114. The power assembly can drive the piston rod 12 to move, and the detection assembly can obtain the damping force, speed, displacement and other parameters of the piston rod 12. The electronically controlled shock absorber fault analysis system may include a first matching state and a third matching state. The first matching state may include the electromagnetic valve body 30 being separated from the base unit 15, the tooling assembly 20 being detachably connected to the base unit 15, and the tooling assembly 20 blocking the connection between the middle chamber and the outer chamber; the third matching state may include the tooling assembly 20 being separated from the base unit 15, the electromagnetic valve body 30 being detachably connected to the base unit 15, and the electromagnetic valve body 30 controlling the flow of the fluid at the second through hole 114.

[0049] like Figure 1 As shown, the electronically controlled shock absorber fault analysis method may include:

[0050] Step S10, under the initial condition, the electronically controlled shock absorber fault analysis system is in the third matching state, and the first working curve of the electronically controlled shock absorber can be obtained by driving the piston rod 12 to move. Based on the fact that the first working curve of the electronically controlled shock absorber is outside the first standard area, the electromagnetic valve body 30 can be separated from the shock absorbing assembly 10. Among them, the first working curve can be the damping force-velocity curve and the damping force-displacement curve of the piston rod 12 of the electronically controlled shock absorber fault analysis system in the third matching state; the first standard area can be the maximum distribution area of ​​the damping force-velocity curve and the damping force-displacement curve of the piston rod 12 of the electronically controlled shock absorber fault analysis system in the third matching state. When the first working curve of the electronically controlled shock absorber is outside the first standard area, it proves that the electronically controlled shock absorber has a fault, that is, the compression unit 13, the recovery unit 14 or the electromagnetic valve body 30 has a fault. By separating the electromagnetic valve body 30 from the shock absorbing assembly 10, it is convenient to eliminate the interference of the electromagnetic valve body 30 in the subsequent test process.

[0051] Step S20, based on the separation of the electromagnetic valve body 30 and the shock absorbing assembly 10, the electronically controlled shock absorber fault analysis system is driven to enter the first matching state, so as to facilitate the analysis of whether the compression unit 13 and the recovery unit 14 are faulty. The first matching state includes the separation of the electromagnetic valve body 30 and the base unit 15, the tooling assembly 20 and the base unit 15 are detachably connected, and the tooling assembly 20 separates the middle chamber from the outer chamber.

[0052] Step S30, based on the electronically controlled shock absorber fault analysis system entering the first matching state, the piston rod 12 drives the restoration unit 14 to reciprocate, and obtains the second working curve of the electronically controlled shock absorber. The second working curve may be the damping force-velocity curve and the damping force-displacement curve of the piston rod 12 of the electronically controlled shock absorber fault analysis system in the first matching state;

[0053] Step S40, based on the second working curve being within the second standard area, obtain the first fault information of the electronically controlled shock absorber. The first fault information of the electronically controlled shock absorber includes that the compression unit 13 and the restoration unit 14 are normal, and the solenoid valve body 30 is abnormal. The second standard area can be the maximum distribution area of ​​the damping force-velocity curve and the damping force-displacement curve of the piston rod 12 in the first matching state of the electronically controlled shock absorber fault analysis system. When the second working curve of the electronically controlled shock absorber is within the second standard area, it proves that the compression unit 13 and the restoration unit 14 are normal, and the solenoid valve body 30 is abnormal. By using the tooling assembly 20 instead of the solenoid valve body 30 for testing, not only can the internal coil of the solenoid valve body 30 be avoided from burning due to long-term high-current testing, but also the cause of the abnormal damping force value of the electronically controlled shock absorber can be accurately analyzed, thereby improving the efficiency and accuracy of the electronically controlled shock absorber fault analysis.

[0054] In this embodiment, if Figure 5As shown, in step S20, the tooling assembly 20 separating the middle chamber from the outer chamber may include the outer peripheral wall of the first movable unit 21 being detachably connected to the inner peripheral wall of the electromagnetic valve cylinder 151, the inner rod 232 may penetrate the electromagnetic valve seat 152, and the end of the second movable unit 22 close to the electromagnetic valve seat 152 may abut against the electromagnetic valve seat 152; wherein, the base unit 15 may include the electromagnetic valve cylinder 151 and the electromagnetic valve seat 152; the tooling assembly 20 may include the first movable unit 21, the second movable unit 22, and the first positioning unit 23; the inner peripheral wall of the first movable unit 21 and the outer peripheral wall of the second movable unit 22 may be slidably connected; the first positioning unit 23 may include the inner rod 232; the inner rod 232 and the inner peripheral wall of the second movable unit 22 may be slidably connected. The inner rod 232 may be used for positioning the second movable unit 22 to ensure that the end of the second movable unit 22 close to the electromagnetic valve seat 152 may abut against the electromagnetic valve seat 152.

[0055] In other embodiments, components with sealing function may be included between one end of the second movable unit 22 and the solenoid valve seat 152, between the inner rod 232 and the inner circumferential wall of the second movable unit 22, between the outer circumferential wall of the first movable unit 21 and the inner circumferential wall of the solenoid valve cylinder 151, and between the inner circumferential wall of the first movable unit 21 and the outer circumferential wall of the second movable unit 22, thereby increasing the sealing of the tooling assembly 20, separating the inner chamber from the outer chamber, and ensuring the accuracy of the analysis results.

[0056] In this embodiment, step S20 may include:

[0057] Step S21, based on the separation of the electromagnetic valve body 30 and the shock absorbing assembly 10, the outer peripheral wall of the first movable unit 21 and the inner peripheral wall of the electromagnetic valve cylinder 151 can be detachably connected. Figure 5 As shown, the tooling assembly 20 may include a first movable unit 21, a second movable unit 22, a first positioning unit 23, and a second positioning unit 24. The base unit 15 may include an electromagnetic valve cylinder 151, an electromagnetic valve seat 152, and a first sealing module 153. The electromagnetic valve seat 152 is set in an annular shape, and the electromagnetic valve seat 152 can be detachably connected to the outer peripheral wall of the middle cylinder 113 around the second through hole 114; the electromagnetic valve cylinder 151 can be fixedly connected to the outer peripheral wall of the outer cylinder 115 around the second through hole 114; the first sealing module 153 can be annular, and the first sealing module 153 is arranged on the side of the electromagnetic valve seat 152 away from the middle cylinder 113. The first movable unit 21 can provide a guide for the installation of the second movable unit 22. A second sealing module 212 may be included between the outer peripheral wall of the first movable unit 21 and the inner peripheral wall of the electromagnetic valve cylinder 151, so as to increase the sealing of the connection between the outer peripheral wall of the first movable unit 21 and the inner peripheral wall of the electromagnetic valve cylinder 151, and prevent the loss of fluid in the outer chamber.

[0058] Step S22: Based on the outer circumferential wall of the first movable unit 21 abutting against the inner circumferential wall of the electromagnetic valve cylinder 151, the second movable unit 22 moves along the inner circumferential wall of the first movable unit 21 toward the electromagnetic valve seat 152. The second movable unit 22 may include a second movable module 221, a gasket 224, and a second movable module 221. Figure 7 As shown, the second movable module 221 may include a movable tube body 2211 and a movable column 2212. The movable column 2212 is fixedly connected to one end of the movable tube body 2211. Figure 5 As shown, a third sealing module 222 may be included between the inner circumferential wall of the first movable unit 21 and the outer circumferential wall of the second movable unit 22, thereby increasing the sealing of the connection between the inner circumferential wall of the first movable unit 21 and the outer circumferential wall of the second movable unit 22 to prevent fluid loss in the outer chamber. The gasket 224 may be divided into different specifications according to thickness, so that the tooling assembly 20 is adapted to electromagnetic valve cylinders 151 of different heights.

[0059] Step S23, based on the end of the movable tube body 2211 close to the electromagnetic valve seat 152 abutting against the electromagnetic valve seat 152, the electronically controlled shock absorber fault analysis system enters the second matching state. The second matching state may include that the tooling assembly 20 is detachably connected to the base unit 15, one end face of the gasket 224 abuts against the end face of the movable tube body 2211 away from the electromagnetic valve seat 152, and the difference between the distance from the side of the gasket 224 away from the movable tube body 2211 to the electromagnetic valve seat 152 and the distance from the end of the first movable unit 21 away from the electromagnetic valve seat 152 to the electromagnetic valve seat 152 is within a set range. When the electronically controlled shock absorber fault analysis system enters the second matching state, it can ensure that the end of the second movable unit 22 close to the electromagnetic valve seat 152 can abut against the electromagnetic valve seat 152 after the tooling assembly 20 is installed, thereby achieving isolation between the middle chamber and the outer chamber. The first sealing module 153 is located between an end surface of the movable tube body 2211 close to the electromagnetic valve seat 152 and the electromagnetic valve seat 152 , and can increase the sealing performance between one end of the movable tube body 2211 and the electromagnetic valve seat 152 .

[0060] Step S24, based on the electronically controlled shock absorber fault analysis system entering the second matching state, the first positioning unit 23 moves along the inner wall of the movable tube body 2211 toward the electromagnetic valve seat 152. The first positioning unit 23 may include a first end cover 231 and an inner rod 232. The first end cover 231 and the inner rod 232 may be detachably connected. Figure 8 As shown, the first end cover 231 may include an end cover body 2311, an end cover center hole 2312, and an end cover circumferential hole 2313. The inner rod 232 is detachably connected to the first end cover 231 through the end cover center hole 2312. The movable column 2212 passes through the end cover circumferential hole 2313. The gasket 224 is located between the first end cover 231 and the movable tube body 2211, and the distance between the movable tube body 2211 and the first end cover 231 can be adjusted.

[0061] Step S25, based on the first end cover 231 abutting against the side of the gasket 224 close to the first end cover 231, and the outer peripheral wall of the inner rod 232 close to the electromagnetic valve seat 152 abutting against the inner peripheral wall of the electromagnetic valve seat 152, the first end cover 231 is detachably connected to the first movable unit 21, and the spring 242 is sleeved on the movable column 2212. Among them, the abutment of the outer peripheral wall of the inner rod 232 close to the electromagnetic valve seat 152 and the inner peripheral wall of the electromagnetic valve seat 152 can improve the positioning accuracy of the second movable unit 22, and avoid the end face of the second movable unit 22 close to the electromagnetic valve seat 152 not completely overlapping with the electromagnetic valve seat 152, thereby causing insufficient isolation between the middle chamber and the outer chamber. A third sealing module 222 can be included between the inner rod 232 and the inner wall of the second movable unit 22, so as to increase the sealing between the inner rod 232 and the inner wall of the second movable unit 22 and avoid fluid loss. The first end cover 231 and the first movable unit 21 are detachably connected to each other so that the positions of the first end cover 231 and the first movable unit 21 are relatively fixed.

[0062] Step S26, based on the detachable connection between the first end cover 231 and the first movable unit 21, and the spring 242 being sleeved on the movable column 2212, the second end cover 241 and the movable column 2212 can be detachably connected. When the second end cover 241 and the movable column 2212 are in a detachable connection state, the length of the spring 242 can be compressed. At this time, the spring 242 applies pressure to the first positioning unit 23 in the direction toward the base unit 15 on the one hand, and applies pressure to the second movable unit 22 away from the base unit 15 on the other hand, so that the position of the side of the first movable unit 21 away from the base unit 15 and the side of the gasket 224 away from the base unit 15 are relatively determined, thereby increasing the stability of the tooling assembly 20 and facilitating the removal of the tooling assembly 20 from the base unit 15.

[0063] Step S27, based on the detachable connection between the second end cover 241 and the movable column 2212, the tooling assembly 20 and the shock absorbing assembly 10 enter the first matching state, thereby successfully separating the middle chamber and the outer chamber, facilitating the smooth implementation of subsequent test steps.

[0064] In this embodiment, the electronically controlled shock absorber fault analysis method may further include:

[0065] Step S50: Based on the second working curve being outside the second standard area, second fault information of the electronically controlled shock absorber can be obtained; wherein the second fault information can include abnormalities of the compression unit 13 and the restoration unit 14. When the second working curve is located or partially located outside the second standard area, it means that the compression unit 13 and the restoration unit 14 are abnormal, and the cause of the electronically controlled shock absorber fault is further analyzed.

[0066] In this embodiment, the electronically controlled shock absorber fault analysis method may further include:

[0067] Step S60, based on the second fault information of the electronically controlled shock absorber, detect whether the electromagnetic valve body 30 is normal. When the compression unit 13 and the recovery unit 14 are abnormal, it is not possible to determine whether the electromagnetic valve body 30 is normal. Therefore, it is possible to further detect whether the electromagnetic valve body 30 is normal, so as to more comprehensively analyze the fault condition of the electronically controlled shock absorber.

[0068] This embodiment proposes an electronically controlled shock absorber fault analysis system, which is applied to an electronically controlled shock absorber fault analysis method of any of the above embodiments. The electronically controlled shock absorber fault analysis system may include a shock absorbing component 10, a tooling component 20, a solenoid valve body 30, a power component, and a detection component.

[0069] like Figure 2 As shown, the shock absorbing assembly 10 may include a shock absorbing cylinder 11, a piston rod 12, a compression unit 13, a recovery unit 14, and a base unit 15. Figure 2 , Figure 6As shown, the shock-absorbing cylinder 11 may include an inner cylinder 111, a middle cylinder 113, an outer cylinder 115, a first through hole 112, a second through hole 114, and a cylinder cover 116. The outer cylinder 115 may be configured as a cylinder, and one end of the outer cylinder 115 may be detachably connected to the cylinder cover 116. The inner circumferential wall of the outer cylinder 115 may surround one side of the cylinder cover 116 to form an outer chamber. The inner cylinder 111 may also be configured as a cylinder, and one end of the inner cylinder 111 may be detachably connected to the cylinder cover 116, and the other end of the inner cylinder 111 may be detachably connected to the compression unit 13. The inner cylinder 111 may be located in the outer chamber. The inner circumferential wall of the inner cylinder 111, one side of the cylinder cover 116, and one side of the compression unit 13 may surround to form an inner chamber. The middle cylinder 113 may be detachably connected to the inner cylinder 111. The middle cylinder 113 may be arranged between the inner cylinder 111 and the outer cylinder 115. The inner circumferential wall of the middle cylinder 113 can surround part of the outer circumferential wall of the inner cylinder 111 to form a middle chamber. The first through hole 112 can penetrate the side wall of the inner cylinder 111. The first through hole 112 can connect the inner chamber with the middle chamber. The second through hole 114 can penetrate the side wall of the middle cylinder 113. The second through hole 114 can connect the middle chamber with the outer chamber. One end of the piston rod 12 can penetrate the cylinder cover 116 and extend into the inner chamber. The piston rod 12 can be slidably connected to the cylinder cover 116. One end of the piston rod 12 can be detachably connected to the recovery unit 14. The recovery unit 14 can be located in the inner chamber. The recovery unit 14 can be slidably connected to the side wall of the inner cylinder 111. The recovery unit 14 can divide the inner chamber into two parts. Among them, the inner chamber located on the side of the recovery unit 14 close to the cylinder cover 116 can be an upper inner chamber, and the inner chamber located on the side of the recovery unit 14 away from the cylinder cover 116 can be a lower inner chamber. The base unit 15 may include an electromagnetic valve cylinder 151 and an electromagnetic valve seat 152. The electromagnetic valve seat 152 may be detachably connected to the outer peripheral wall of the middle cylinder 113 around the second through hole 114. The electromagnetic valve cylinder 151 may be fixedly connected to the outer peripheral wall of the outer cylinder 115 around the second through hole 114. The electromagnetic valve cylinder 151 may be configured to be cylindrical, and the electromagnetic valve seat 152 may be configured to be annular.

[0070] The tooling assembly 20 can be used to separate the middle chamber from the outer chamber.

[0071] The solenoid valve body 30 can control the flow rate of the fluid passing through the second through hole 114 .

[0072] The power assembly can be drivingly connected to the piston rod 12 to drive the piston rod 12 to reciprocate along the axis direction of the inner cylinder 111 .

[0073] The detection component obtains the force, speed, and displacement parameters of the piston rod 12 during its movement, thereby drawing a damping force-speed curve and a damping force-displacement curve of the piston rod 12 to help determine whether the electronically controlled shock absorber is operating normally.

[0074] The electronically controlled shock absorber fault analysis system may include a first matching state and a third matching state. Figure 3 , Figure 4 As shown, the first mating state may include the electromagnetic valve body 30 being separated from the base unit 15, the tooling assembly 20 being detachably connected to the base unit 15, and the tooling assembly 20 separating the middle chamber from the outer chamber. Figure 2 As shown, the third mating state may include the tooling assembly 20 being separated from the base unit 15 , the solenoid valve body 30 being detachably connected to the base unit 15 , and the solenoid valve body 30 controlling the flow at the second through hole 114 .

[0075] In this embodiment, if Figure 2 As shown, the compression unit 13 may include a compression valve body 131, a first throttle hole 132, and a second throttle hole 133. The first throttle hole 132 may penetrate the compression valve body 131, the second throttle hole 133 may penetrate the compression valve body 131, and the first throttle hole 132 and the second throttle hole 133 do not overlap. The first throttle hole 132 may connect the lower inner chamber with the outer chamber, and the second throttle hole 133 may connect the lower inner chamber with the outer chamber. The recovery unit 14 may include a recovery valve body 141, a third throttle hole 142, and a fourth throttle hole 143. The third throttle hole 142 may penetrate the recovery valve body 141, the fourth throttle hole 143 may penetrate the recovery valve body 141, and the third throttle hole 142 and the fourth throttle hole 143 do not overlap. The third throttle hole 142 may connect the upper inner chamber with the lower inner chamber, and the fourth throttle hole 143 may connect the upper inner chamber with the lower inner chamber. The piston rod 12 can be detachably connected to the restoration valve body 141. The electronically controlled shock absorber fault analysis system can include a compression stage and a restoration stage. The compression stage can include the piston rod 12 driving the restoration unit 14 to move in the inner chamber along the axial direction toward the direction close to the compression unit 13, the first throttle hole 132 and the fourth throttle hole 143 are both in a conducting state, and the second throttle hole 133 and the third throttle hole 142 are both in a closed state. In the compression stage, a part of the fluid in the lower inner chamber enters the outer chamber through the first throttle hole 132; another part of the fluid enters the upper inner chamber through the third throttle hole 142, enters the middle chamber through the first through hole 112, and then enters the outer chamber through the second through hole 114. The restoration stage can include the piston rod 12 driving the restoration unit 14 to move in the inner chamber along the axial direction toward the direction away from the compression unit 13, the second throttle hole 133 and the third throttle hole 142 are both in a conducting state, and the first throttle hole 132 and the fourth throttle hole 143 are both in a closed state. In the recovery stage, part of the fluid in the outer chamber enters the lower inner chamber through the second throttle hole 133, and part of the fluid in the middle chamber enters the upper inner chamber through the first through hole 112, and then enters the lower inner chamber through the third throttle hole 142. When the vehicle drives the piston rod 12 to reciprocate due to vibration, the liquid in the inner chamber limits the speed and displacement of the reciprocating motion of the piston rod 12, thereby achieving a shock-absorbing effect.

[0076] In this embodiment, if Figure 5As shown, the tooling assembly 20 may include a first movable unit 21, a second movable unit 22, a first positioning unit 23, and a second positioning unit 24. The first movable unit 21 may include a first movable module 211 and a second sealing module 212. The second sealing module 212 may be arranged in an annular shape. The second sealing module 212 may be arranged circumferentially along the outer peripheral wall of the first movable module 211. The second movable unit 22 may include a second movable module 221, a third sealing module 222, and a fourth sealing module 223. Figure 7 As shown, the second movable module 221 may include a movable tube body 2211 and a movable column 2212. The movable column 2212 may be fixedly connected to one end of the movable tube body 2211. The outer circumference of the movable tube body 2211 may match the inner circumference of the first movable module 211. The outer circumferential wall of the movable tube body 2211 may be slidably connected to the inner circumferential wall of the first movable module 211. The third sealing module 222 and the fourth sealing module 223 may both be arranged in an annular shape. The third sealing module 222 may be arranged circumferentially along the outer circumferential wall of the movable tube body 2211. The fourth sealing module 223 may be arranged circumferentially along the inner circumferential wall of the movable tube body 2211. The first positioning unit 23 may include a first end cover 231 and an inner rod 232. As shown Figure 8As shown, the first end cover 231 includes an end cover body 2311, an end cover center hole 2312, and an end cover circumferential hole 2313. The end cover body 2311 is detachably connected to one end of the inner rod 232 through the end cover center hole 2312. The diameter of the inner rod 232 can match the inner diameter of the movable tube body 2211, and the diameter of the inner rod 232 can match the inner diameter of the solenoid valve seat 152. The inner rod 232 can be slidably connected to the inner peripheral wall of the movable tube body 2211. The movable cylinder 2212 can pass through the end cover circumferential hole 2313. The second positioning unit 24 can include a second end cover 241 and a spring 242. The diameter of the spring 242 can match the diameter of the movable cylinder 2212. The spring 242 can be sleeved on the movable cylinder 2212. The second end cover 241 can be detachably connected to the movable cylinder 2212. One end of the spring 242 can abut against the first end cover 231, and the other end can abut against the second end cover 241. When the second end cover 241 and the movable column 2212 are in a detachable connection state, the length of the spring 242 is compressed. At this time, the spring 242 applies pressure on the first end cover 231 in the direction of the second movable unit 22 on the one hand, and applies pressure on the second movable unit 22 in the direction of the first end cover 231 on the other hand, so that the second movable unit 22 and the first end cover 231 are kept in contact, so that the positions of the second movable unit 22 and the first movable unit 21 are relatively determined, thereby increasing the stability of the tooling assembly 20, and also facilitating the removal of the tooling assembly 20 from the base unit 15. The first mating state also includes that the outer peripheral wall of the first movable module 211 is detachably connected to the inner peripheral wall of the electromagnetic valve cylinder 151, one end of the inner rod 232 is movably connected to the inner peripheral wall of the electromagnetic valve seat 152, and one end of the movable tube body 2211 close to the electromagnetic valve seat 152 abuts against the electromagnetic valve seat 152.

[0077] In this embodiment, if Figure 5As shown, the base unit 15 may also include a first sealing module 153, which is convenient for improving the sealing of the critical point when the second movable unit 22 or the electromagnetic valve body 30 abuts against the electromagnetic valve seat 152. The first sealing module 153 can be set in an annular shape. The first sealing module 153 can be set on the side of the electromagnetic valve seat 152 away from the middle cylinder 113. The electromagnetic valve cylinder 151 may include a first cylinder 1511, a second cylinder 1512, and a third cylinder 1513. The first cylinder 1511, the second cylinder 1512, and the third cylinder 1513 can be fixedly connected in sequence. The inner diameters of the first cylinder 1511, the second cylinder 1512, and the third cylinder 1513 can be increased in sequence. The first cylinder 1511 can be fixedly connected to the outer peripheral wall of the outer cylinder 115 around the second through hole 114. The first movable module 211 may include a first positioning ring 2111, a second positioning ring 2112, and a third positioning ring 2113. The first positioning ring 2111, the second positioning ring 2112, and the third positioning ring 2113 can be fixedly connected in sequence. The first matching state can also include that the outer peripheral wall of the first positioning ring 2111 is spaced from the inner peripheral wall of the first cylinder 1511, the outer peripheral wall of the second positioning ring 2112 abuts against the inner peripheral wall of the second cylinder 1512, and the outer peripheral wall of the third positioning ring 2113 is detachably connected to the inner peripheral wall of the third cylinder 1513. The second positioning module can be arranged at the abutment between the outer peripheral side of the second positioning ring 2112 and the inner peripheral side of the second cylinder 1512 to increase the sealing performance and avoid fluid loss. When one end of the second movable unit 22 close to the electromagnetic valve seat 152 abuts against the electromagnetic valve seat 152, the second movable unit 22 and the electromagnetic valve seat 152 squeeze the first sealing module 153, thereby improving the sealing effect of the abutment between the second movable unit 22 and the electromagnetic valve seat 152, thereby effectively separating the fluid in the middle chamber and the outer chamber. The third matching state may also include that one end of the solenoid valve body 30 close to the solenoid valve seat 152 abuts against the solenoid valve seat 152, and the solenoid valve body 30 is detachably connected to the inner peripheral wall of the first cylinder 1511. When one end of the solenoid valve body 30 close to the solenoid valve seat 152 abuts against the solenoid valve seat 152, the solenoid valve body 30 and the solenoid valve seat 152 squeeze the first sealing module 153, thereby achieving a good sealing effect at the abutment between the solenoid valve body 30 and the solenoid valve seat 152.

[0078] In this embodiment, if Fig. 9As shown, the second movable unit 22 may further include a gasket 224. The gasket 224 may be divided into different specifications according to thickness, and gaskets 224 of different specifications are used for electromagnetic valve cylinders 151 of different heights, so that the electronically controlled shock absorber fault analysis system enters a second matching state. The second matching state of the electronically controlled shock absorber fault analysis system may include: the outer peripheral wall of the first movable unit 21 is detachably connected to the inner peripheral wall of the electromagnetic valve cylinder 151, an end face of the gasket 224 abuts against an end face of the movable tube body 2211 away from the electromagnetic valve seat 152, and the difference between the distance from the side of the gasket 224 away from the movable tube body 2211 to the electromagnetic valve seat 152 and the distance from the end of the first movable unit 21 away from the electromagnetic valve seat 152 to the electromagnetic valve seat 152 is within a set range. Since the first sealing module 153 is arranged between the second movable unit 22 and the electromagnetic valve seat 152, when the difference between the distance from the side of the gasket 224 away from the movable tube body 2211 to the electromagnetic valve seat 152 and the distance from the end of the first movable unit 21 away from the electromagnetic valve seat 152 to the electromagnetic valve seat 152 is within a set range, the sealing between the second movable unit 22 and the electromagnetic valve seat 152 can meet the test requirements. By setting the second movable unit 22 to also include the gasket 224 to adapt to electromagnetic valve cylinders 151 of different heights, the flexibility and accuracy of the fault analysis of the electronically controlled shock absorber are improved.

[0079] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A method for analyzing faults of an electronically controlled shock absorber, characterized in that: The electronically controlled shock absorber fault analysis method comprises: Step S10, based on the first working curve of the electronically controlled shock absorber being outside the first standard area, the electromagnetic valve body is separated from the shock absorbing assembly; wherein the electronically controlled shock absorber comprises a shock absorbing assembly, a tooling assembly, and an electromagnetic valve body; the shock absorbing assembly comprises a shock absorbing cylinder, a piston rod, a compression unit, a recovery unit, and a base unit; the shock absorbing cylinder comprises an inner cylinder, a middle cylinder, an outer cylinder, a first through hole, a second through hole, and a cylinder cover; one end of the outer cylinder is detachably connected to the cylinder cover; the inner circumferential wall of the outer cylinder and one side of the cylinder cover surround to form an outer chamber; one end of the inner cylinder is detachably connected to the cylinder cover, and the other end of the inner cylinder is detachably connected to the compression unit; the inner cylinder is located in the outer chamber; the inner circumferential wall of the inner cylinder, one side of the cylinder cover, and one side of the compression unit surround to form an inner chamber; the middle cylinder is detachably connected to the inner cylinder; the middle cylinder is arranged between the inner cylinder and the outer cylinder; the inner circumferential wall of the middle cylinder and part of the outer circumferential wall of the inner cylinder surround to form a middle chamber; the electromagnetic valve body is detachably connected to the base unit; Step S20, based on the separation of the electromagnetic valve body and the shock absorbing assembly, driving the electronically controlled shock absorber fault analysis system to enter a first matching state; wherein the first matching state includes the separation of the electromagnetic valve body and the base unit, the tooling assembly and the base unit are detachably connected, and the tooling assembly separates the middle chamber from the outer chamber; The tooling assembly in step S20 separates the middle chamber from the outer chamber, including a first movable unit whose outer peripheral wall is detachably connected to an inner peripheral wall of a solenoid valve cylinder, an inner rod passing through a solenoid valve seat, and an end of a second movable unit close to the solenoid valve seat abutting against the solenoid valve seat; wherein the base unit includes a solenoid valve cylinder and a solenoid valve seat; the tooling assembly includes a first movable unit, a second movable unit, and a first positioning unit; the inner peripheral wall of the first movable unit is slidably connected to the outer peripheral wall of the second movable unit; the first positioning unit includes an inner rod; the inner rod is slidably connected to the inner peripheral wall of the second movable unit; Step S30, based on the electronically controlled shock absorber fault analysis system entering the first matching state, the piston rod drives the restoration unit to reciprocate, and obtains a second working curve of the electronically controlled shock absorber; Step S40, based on the second working curve being within a second standard area, obtaining first fault information of the electronically controlled shock absorber; wherein the first fault information of the electronically controlled shock absorber includes that the compression unit and the restoration unit are normal, and the solenoid valve body is abnormal.

2. The method for analyzing faults of an electronically controlled shock absorber according to claim 1, characterized in that: The step S20 comprises: Step S21, based on the separation of the solenoid valve body and the shock absorbing assembly, the outer peripheral wall of the first movable unit is detachably connected to the inner peripheral wall of the solenoid valve cylinder; wherein the tooling assembly further includes a second positioning unit; the base unit further includes a first sealing module; the solenoid valve seat is detachably connected to the outer peripheral wall of the middle cylinder around the second through hole; the solenoid valve cylinder is fixedly connected to the outer peripheral wall of the outer cylinder around the second through hole; Step S22, based on the detachable connection between the outer circumferential wall of the first movable unit and the inner circumferential wall of the solenoid valve cylinder, the second movable unit moves along the inner circumferential wall of the first movable unit toward the solenoid valve seat; wherein the second movable unit includes a second movable module and a gasket, and the second movable module includes a movable tube body and a movable column; the gasket is divided into different specifications according to thickness; Step S23, based on the end of the movable tube body close to the solenoid valve seat abutting against the solenoid valve seat, the electronically controlled shock absorber fault analysis system enters a second matching state; wherein the second matching state includes that the outer peripheral wall of the first movable unit is detachably connected to the inner peripheral wall of the solenoid valve cylinder, the end surface of one end of the gasket abuts against the end surface of one end of the movable tube body away from the solenoid valve seat, and the difference between the distance from the side of the gasket away from the movable tube body to the solenoid valve seat and the distance from the end of the first movable unit away from the solenoid valve seat to the solenoid valve seat is within a set range; Step S24, based on the electronically controlled shock absorber fault analysis system entering the second matching state, the first positioning unit is moved along the inner peripheral wall of the movable tube body toward the electromagnetic valve seat; wherein the first positioning unit further includes a first end cover; the first end cover is detachably connected to the inner rod; Step S25, based on the first end cover abutting against the side of the gasket close to the first end cover, and the outer peripheral wall of one end of the inner rod close to the electromagnetic valve seat abutting against the inner peripheral wall of the electromagnetic valve seat, the first end cover is detachably connected to the first movable unit, and the spring is sleeved on the movable column; Step S26, based on the detachable connection between the first end cover and the first movable unit and the spring being sleeved on the movable column, the second end cover is detachably connected to the movable column; wherein, when the second end cover and the movable column are in a detachable connection state, the length of the spring is compressed; Step S27: based on the detachable connection between the second end cover and the movable column, the electronically controlled shock absorber fault analysis system enters a first matching state.

3. The method for analyzing faults of an electronically controlled shock absorber according to claim 1, characterized in that: The electronically controlled shock absorber fault analysis method further comprises: Step S50: acquiring second fault information of the electronically controlled shock absorber based on the second working curve being outside the second standard area; wherein the second fault information includes abnormalities of the compression unit and the restoration unit.

4. The method for analyzing faults of an electronically controlled shock absorber according to claim 3, characterized in that: The electronically controlled shock absorber fault analysis method further comprises: Step S60: Based on the second fault information of the electronically controlled shock absorber, detecting whether the solenoid valve body is normal.

5. An electronically controlled shock absorber fault analysis system, characterized in that: The electronically controlled shock absorber fault analysis system is applied to an electronically controlled shock absorber fault analysis method according to any one of claims 1 to 4, and the electronically controlled shock absorber fault analysis system comprises: The shock-absorbing assembly comprises a shock-absorbing cylinder, a piston rod, a compression unit, a recovery unit, and a base unit; the shock-absorbing cylinder comprises an inner cylinder, a middle cylinder, an outer cylinder, a first through hole, a second through hole, and a cylinder cover; one end of the outer cylinder is detachably connected to the cylinder cover; the inner circumferential wall of the outer cylinder and one side of the cylinder cover surround an outer chamber; one end of the inner cylinder is detachably connected to the cylinder cover, and the other end of the inner cylinder is detachably connected to the compression unit; the inner cylinder is located in the outer chamber; the inner circumferential wall of the inner cylinder, one side of the cylinder cover, and one side of the compression unit surround an inner chamber; the middle cylinder is detachably connected to the inner cylinder; the middle cylinder is arranged between the inner cylinder and the outer cylinder; the inner circumferential wall of the middle cylinder and part of the outer circumferential wall of the inner cylinder surround a middle chamber; the first through hole passes through the side wall of the inner cylinder; the first through hole connects the inner chamber with the middle The cam is connected to the piston rod and the piston rod is slidably connected to the cylinder cover; one end of the piston rod is detachably connected to the recovery unit; the recovery unit is located in the inner chamber; the recovery unit is slidably connected to the side wall of the inner cylinder; the recovery unit divides the inner chamber into two parts; wherein the inner chamber located on the side of the recovery unit close to the cylinder cover is the upper inner chamber, and the inner chamber located on the side of the recovery unit away from the cylinder cover is the lower inner chamber; the base unit comprises an electromagnetic valve cylinder and an electromagnetic valve seat; the electromagnetic valve seat is detachably connected to the outer peripheral wall of the middle cylinder around the second through hole; the electromagnetic valve cylinder is fixedly connected to the outer peripheral wall of the outer cylinder around the second through hole; Tooling components; Solenoid valve body; A power assembly, the power assembly is drivingly connected to the piston rod; A detection component, wherein the detection component obtains force, speed, and displacement parameters of the piston rod during movement; The electronically controlled shock absorber fault analysis system includes a first mating state and a third mating state; the first mating state includes the solenoid valve body being separated from the base unit, the tooling assembly being detachably connected to the base unit, and the tooling assembly separating the middle chamber from the outer chamber; the third mating state includes the tooling assembly being separated from the base unit, the solenoid valve body being detachably connected to the base unit, and the solenoid valve body controlling the flow at the second through hole.

6. The electronically controlled shock absorber fault analysis system according to claim 5, characterized in that: The compression unit includes a compression valve body, a first throttle hole, and a second throttle hole; the first throttle hole penetrates the compression valve body, and the second throttle hole penetrates the compression valve body; the first throttle hole connects the lower inner chamber with the outer chamber, and the second throttle hole connects the lower inner chamber with the outer chamber; the recovery unit includes a recovery valve body, a third throttle hole, and a fourth throttle hole; the third throttle hole penetrates the recovery valve body, and the fourth throttle hole penetrates the recovery valve body; the third throttle hole connects the upper inner chamber with the lower inner chamber, and the fourth throttle hole connects the upper inner chamber with the lower inner chamber; the piston rod is connected to the recovery valve body. The valve body is detachably connected; the electronically controlled shock absorber fault analysis system includes a compression stage and a recovery stage; the compression stage includes the piston rod driving the recovery unit to move in the inner chamber along the axial direction toward the compression unit, the first throttle hole and the fourth throttle hole are in a conducting state, and the second throttle hole and the third throttle hole are in a closed state; the recovery stage includes the piston rod driving the recovery unit to move in the inner chamber along the axial direction toward the compression unit, the second throttle hole and the third throttle hole are in a conducting state, and the first throttle hole and the fourth throttle hole are in a closed state.

7. The electronically controlled shock absorber fault analysis system according to claim 5, characterized in that: The tooling assembly includes a first movable unit, a second movable unit, a first positioning unit, and a second positioning unit; the first movable unit includes a first movable module and a second sealing module; the second sealing module is arranged in an annular shape; the second sealing module is arranged circumferentially along the outer peripheral wall of the first movable module; the second movable unit includes a second movable module, a third sealing module, and a fourth sealing module; the second movable module includes a movable tube body and a movable column; the movable column is fixedly connected to one end of the movable tube body; the outer circumference of the movable tube body matches the inner circumference of the first movable module; the outer peripheral wall of the movable tube body is slidably connected to the inner peripheral wall of the first movable module; the third sealing module and the fourth sealing module are both arranged in an annular shape; the third sealing module is arranged circumferentially along the circumferential wall of the movable tube body; the fourth sealing module is arranged circumferentially along the inner peripheral wall of the movable tube body; the first positioning unit includes a first end cover and an inner rod; the first end cover includes an end cover body, an end cover center hole, an end The second positioning unit comprises a second end cap and a spring; the diameter of the spring matches the diameter of the movable cylinder; the spring is sleeved on the movable cylinder; the second end cap is detachably connected to the movable cylinder; one end of the spring abuts against the first end cap, and the other end abuts against the second end cap; wherein, when the second end cap and the movable cylinder are in a detachable connection state, the length of the spring is compressed; the first matching state also includes the outer peripheral wall of the first movable module being detachably connected to the inner peripheral wall of the electromagnetic valve cylinder; one end of the inner rod is slidably connected to the inner peripheral wall of the electromagnetic valve seat; the end of the movable cylinder close to the electromagnetic valve seat abuts against the electromagnetic valve seat.

8. The electronically controlled shock absorber fault analysis system according to claim 7, characterized in that: The base unit also includes a first sealing module; the first sealing module is set in an annular shape; the first sealing module is located on the side of the solenoid valve seat away from the middle cylinder; the solenoid valve cylinder includes a first cylinder, a second cylinder, and a third cylinder; the first cylinder, the second cylinder, and the third cylinder are fixedly connected in sequence; the inner diameters of the first cylinder, the second cylinder, and the third cylinder are increased in sequence; the first cylinder is fixedly connected to the outer peripheral wall of the outer cylinder around the second through hole; the first movable module includes a first positioning ring, a second positioning ring, and a third positioning ring; the first positioning ring, the second positioning ring, and the third positioning ring are fixedly connected in sequence; the first matching state also includes the outer peripheral wall of the first positioning ring being spaced apart from the inner peripheral wall of the first cylinder, the outer peripheral wall of the second positioning ring abutting against the inner peripheral wall of the second cylinder, and the outer peripheral wall of the third positioning ring being detachably connected to the inner peripheral wall of the third cylinder; the third matching state also includes the end of the solenoid valve body close to the solenoid valve seat abutting against the solenoid valve seat, and the solenoid valve body is detachably connected to the inner peripheral wall of the first cylinder.

9. The electronically controlled shock absorber fault analysis system according to claim 7, characterized in that: The second movable unit also includes a gasket; the electronically controlled shock absorber fault analysis system includes a second mating state; the second mating state includes: the outer peripheral wall of the first movable unit is detachably connected to the inner peripheral wall of the solenoid valve tube, an end face of one end of the gasket abuts against an end face of the movable tube body away from the solenoid valve seat, and the difference between the distance from the side of the gasket away from the movable tube body to the solenoid valve seat and the distance from the end of the first movable unit away from the solenoid valve seat to the solenoid valve seat is within a set range.

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