CN119124670A

CN119124670A - A method and system for analyzing faults of an electronically controlled shock absorber

Info

Publication number: CN119124670A
Application number: CN202411616445.2A
Authority: CN
Inventors: 杜兴慧; 温浩; 雷春宁; 王刚
Original assignee: Zhejiang Wanxiang Marelli Shock Absorber Co ltd; Wanxiang Qianchao Co Ltd
Current assignee: Zhejiang Wanxiang Marelli Shock Absorber Co ltd; Wanxiang Qianchao Co Ltd
Priority date: 2024-11-13
Filing date: 2024-11-13
Publication date: 2024-12-13
Anticipated expiration: 2044-11-13
Also published as: CN119124670B

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

Fault analysis method and system for electric control shock absorber

Technical Field

The invention relates to the technical field of electric control shock absorbers, in particular to a fault analysis method and system for an electric control shock absorber.

Background

Damping performance is one of the most critical characteristics of the electric control shock absorber, and the comfort and the operability of the whole automobile are directly affected. The damping performance of the electromagnetic valve external semi-active electric control shock absorber is determined by a passive valve system (a recovery valve system and a compression valve system) and the electromagnetic valve. The abnormal condition of the damping force of the electric control shock absorber can be caused by the abnormal passive valve system or the abnormal electromagnetic valve system, and the next procedure is usually required to be carried out after the non-abnormal passive valve system is ensured in the damping force value adjustment process and the production process of the semi-active electric control shock absorber.

The damping electric control shock absorber usually adopts a normally open electromagnetic valve, and when the current is increased, the opening and closing degree of the electromagnetic valve is reduced. And analyzing whether the passive valve system normally needs to keep the electromagnetic valve in a closed state, so that the interference of the electromagnetic valve is eliminated. Therefore, a large current needs to be applied to the electromagnetic valve, and meanwhile, if the test time is long, the coil of the electromagnetic valve is easy to overheat and burn out, so that the detection of the passive valve system cannot be finished.

Disclosure of Invention

The invention provides a fault analysis method and system for an electric control shock absorber, which are used for solving the problem of difficulty in fault analysis of the electric control shock absorber.

In a first aspect, the present invention provides a method for analyzing faults of an electric control shock absorber, the method for analyzing faults of the electric control shock absorber comprising:

s10, separating an electromagnetic valve body from a damping component based on a first working curve of the electric control damper outside a first standard area, wherein the electric control damper comprises the damping component, a tool component and the electromagnetic valve body, the damping component comprises a damping cylinder body, a piston rod, a compression unit, a restoration unit and a base unit, the damping cylinder body 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 with the cylinder cover, an outer cavity is formed by surrounding one side of the inner peripheral wall of the outer cylinder and one side of the cylinder cover, one end of the inner cylinder is detachably connected with the cylinder cover, the other end of the inner cylinder is detachably connected with the compression unit, the inner cylinder is positioned in the outer cavity, one side of the inner peripheral wall of the inner cylinder, one side of the cylinder cover and one side of the compression unit are surrounded to form an inner cavity, the middle cylinder is detachably connected with the inner cylinder, the middle cylinder is arranged between the inner peripheral wall of the middle cylinder and the inner cylinder, and part of the outer peripheral wall of the inner cylinder is surrounded to form a middle cavity, and the electromagnetic valve body is detachably connected with the base unit;

Step S20, based on the separation of the electromagnetic valve body and the damping component, driving an electric control shock absorber fault analysis system to enter a first matching state, wherein the first matching state comprises the separation of the electromagnetic valve body and the base unit, the tool component is detachably connected with the base unit, and the tool component separates the middle cavity from the outer cavity;

Step S30, based on the failure analysis system of the electric control shock absorber entering the first matching state, enabling the piston rod to drive the recovery unit to reciprocate, and obtaining a second working curve of the electric control shock absorber;

And step S40, acquiring first fault information of the electric control shock absorber based on the fact that the second working curve is located in a second standard area, wherein the first fault information of the electric control shock absorber comprises that the compression unit and the recovery unit are normal, and the electromagnetic valve body is abnormal.

In some embodiments, the step S20 includes that the tool assembly separates the middle chamber from the outer chamber, wherein the outer peripheral wall of the first movable unit is detachably connected with the inner peripheral wall of the electromagnetic valve cylinder, the inner rod penetrates through the electromagnetic valve seat, one end of the second movable unit, which is close to the electromagnetic valve seat, is abutted against the electromagnetic valve seat, the base unit includes the electromagnetic valve cylinder and the electromagnetic valve seat, the tool 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 with the outer peripheral wall of the second movable unit, the first positioning unit includes the inner rod, and the inner rod is slidably connected with the inner peripheral wall of the second movable unit.

In some embodiments, the step S20 includes:

S21, separating the electromagnetic valve body from the damping component to enable the outer peripheral wall of the first movable unit to be detachably connected with the inner peripheral wall of the electromagnetic valve barrel, wherein the tool component comprises a first movable unit, a second movable unit, a first positioning unit and a second positioning unit;

S22, based on detachable connection of the outer peripheral wall of the first movable unit and the inner peripheral wall of the electromagnetic valve cylinder, a second movable unit moves towards the electromagnetic valve seat along the inner peripheral wall of the first movable unit, wherein the second movable unit comprises a second movable module and a gasket, and the second movable module comprises a movable pipe body and a movable cylinder;

Step S23, enabling the fault analysis system of the electric control shock absorber to enter a second matching state based on the fact that one end, close to the electromagnetic valve seat, of the movable pipe body is abutted to the electromagnetic valve seat, wherein the second matching state comprises that the outer peripheral wall of the first movable unit is detachably connected with the inner peripheral wall of the electromagnetic valve barrel, one end face of the gasket is abutted to one end face, far away from the electromagnetic valve seat, of the movable pipe body, and the difference between the distance, far away from the electromagnetic valve seat, of one side of the gasket and the distance, far away from the electromagnetic valve seat, of the first movable unit is within a set range;

step S24, enabling the first positioning unit to move towards the electromagnetic valve seat along the inner peripheral wall of the movable pipe body based on a second matching state of the electric control shock absorber fault analysis system, wherein the first positioning unit comprises a first end cover and an inner rod;

Step S25, based on the fact that the first end cover is abutted with one side, close to the first end cover, of the gasket, the outer peripheral wall, close to one end of the electromagnetic valve seat, of the inner rod is abutted with the inner peripheral wall of the electromagnetic valve seat, the first end cover is detachably connected with the first movable unit, and a spring is sleeved on the movable cylinder;

S26, detachably connecting a second end cover with the movable column body based on the fact that the first end cover is detachably connected with the first movable unit, and the spring is sleeved on the movable column body, wherein when the second end cover is in a detachable connection state with the movable column body, the length of the spring is compressed;

And step S27, based on the detachable connection of the second end cover and the movable column body, the fault analysis system of the electric control shock absorber enters a first matching state.

In some embodiments, the electronically controlled damper fault analysis method further comprises:

And step S50, acquiring second fault information of the electric control shock absorber based on the second working curve outside the second standard area, wherein the second fault information comprises the abnormality of the compression unit and the recovery unit.

and step S60, detecting whether the electromagnetic valve body is normal or not based on the second fault information of the electric control shock absorber.

In a second aspect, the present invention provides an electronically controlled damper fault analysis system, which is applied to the electronically controlled damper fault analysis method of any one of the above embodiments, the electronically controlled damper fault analysis system comprising:

The shock absorption assembly comprises a shock absorption cylinder body, a piston rod, a compression unit, a restoring unit and a base unit, wherein the shock absorption cylinder body 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 with the cylinder cover, one side of the inner circumferential wall of the outer cylinder is surrounded with one side of the cylinder cover to form an outer cavity, one end of the inner cylinder is detachably connected with the cylinder cover, the other end of the inner cylinder is detachably connected with the compression unit, the inner circumferential wall of the inner cylinder, one side of the cylinder cover and one side of the compression unit are surrounded to form an inner cavity, the middle cylinder is detachably connected with 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 one side of the outer cylinder cover are surrounded to form a middle cavity, the first through hole penetrates through the inner cylinder side wall, the first through hole is communicated with the inner cavity and the middle cavity, the first through hole penetrates through the inner cylinder side wall, the second through hole is communicated with the middle cylinder side of the inner cavity, one side of the inner cavity is communicated with one side of the outer cylinder cover, one side of the inner cavity is connected with one side of the piston rod and one side of the piston rod is located at one side of the piston rod is far from the piston rod, one side of the restoring unit is connected with one side of the piston rod, the electromagnetic valve seat is detachably connected with the outer peripheral wall of the middle cylinder at the periphery of the second through hole, and the electromagnetic valve cylinder is fixedly connected with the outer peripheral wall of the outer cylinder at the periphery of the second through hole;

A tooling assembly;

an electromagnetic valve body;

the power assembly is in driving connection with the piston rod;

the detection component acquires force, speed and displacement parameters in the movement process of the piston rod;

The fault analysis system of the electric control shock absorber comprises a first matching state and a third matching state, wherein the first matching state comprises that the electromagnetic valve body is separated from the base unit, the tool assembly is detachably connected with the base unit and separates the middle cavity from the outer cavity, the third matching state comprises that the tool assembly is separated from the base unit, the electromagnetic valve body is detachably connected with the base unit, and the electromagnetic valve body controls the flow rate at the second through hole.

In some embodiments, the compression unit comprises a compression valve body, a first orifice and a second orifice, the first orifice penetrates through the compression valve body, the second orifice penetrates through the compression valve body, the first orifice is communicated with the lower inner chamber and the outer chamber, the second orifice is communicated with the lower inner chamber and the outer chamber, the recovery unit comprises a recovery valve body, a third orifice and a fourth orifice, the third orifice penetrates through the recovery valve body, the fourth orifice penetrates through the recovery valve body, the third orifice is communicated with the upper inner chamber and the lower inner chamber, the fourth orifice is communicated with the upper inner chamber and the lower inner chamber, the piston rod is detachably connected with the recovery valve body, the electronically controlled shock absorber fault analysis system comprises a compression stage and a recovery stage, the compression stage comprises that the piston rod drives the recovery unit to move in the inner chamber towards the compression unit along the axial direction, the first orifice and the fourth orifice are in a conducting state, the third orifice is communicated with the upper inner chamber and the lower inner chamber, the fourth orifice is in a conducting state, the piston rod is driven to move in the recovery stage towards the piston rod and the piston rod is in the recovery stage along the axial direction, and the piston rod is in the recovery stage is in the conducting state.

In some embodiments, the tool assembly comprises a first movable unit, a second movable unit, a first positioning unit and a second positioning unit, wherein the first movable unit comprises a first movable module and a second sealing module, the second sealing module is arranged in an annular shape, the second sealing module is circumferentially arranged along the outer circumferential wall of the first movable module, the second movable unit comprises a second movable module, a third sealing module and a fourth sealing module, the second movable module comprises a movable pipe body and a movable cylinder, the movable cylinder is fixedly connected to one end of the movable pipe body, the outer circumferential diameter of the movable pipe body is matched with the inner circumferential diameter of the first movable module, the outer circumferential wall of the movable pipe body is slidably connected with the inner circumferential wall of the first movable module, the third sealing module and the fourth sealing module are respectively arranged in an annular shape, the third sealing module is circumferentially arranged along the outer circumferential wall of the movable pipe body, the fourth sealing module is circumferentially arranged along the inner circumferential wall of the movable pipe body, the movable cylinder is fixedly connected with one end of the movable pipe body, the outer circumferential diameter of the movable pipe body is matched with the inner circumferential diameter of the inner circumferential wall of the first movable pipe body, the inner circumferential wall of the movable pipe body is matched with the inner circumferential wall of the first end cover, the electromagnetic end cover is matched with the electromagnetic end cover, the diameter of the spring is matched with that of the movable column, the spring is sleeved on the movable column, the second end cover is detachably connected with the movable column, one end of the spring is abutted against the first end cover, the other end of the spring is abutted against the second end cover, when the second end cover is in a detachable connection state with the movable column, the length of the spring is compressed, the first matching state further comprises that the outer peripheral wall of the first movable module is detachably connected with the inner peripheral wall of the electromagnetic valve barrel, one end of the inner rod is in sliding connection with the inner peripheral wall of the electromagnetic valve seat, and one end of the movable pipe body, which is close to the electromagnetic valve seat, is abutted against the electromagnetic valve seat.

In some embodiments, the base unit further comprises a first sealing module, the first sealing module is arranged to be annular, the first sealing module is located on one side, far away from the middle cylinder, of the electromagnetic valve seat, the electromagnetic valve cylinder comprises a first cylinder body, a second cylinder body and a third cylinder body, the first cylinder body, the second cylinder body and the third cylinder body are sequentially and fixedly connected, the inner diameters of the first cylinder body, the second cylinder body and the third cylinder body are sequentially increased, the first cylinder body is fixedly connected with the outer peripheral wall of the outer cylinder at the periphery of the second through hole, the first movable module comprises 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 sequentially and fixedly connected, the outer peripheral wall of the first positioning ring and the inner peripheral wall of the first cylinder body are sequentially and fixedly arranged, the outer peripheral wall of the second positioning ring and the inner peripheral wall of the second cylinder body are in an interval mode, the outer peripheral wall of the second positioning ring and the inner peripheral wall of the first positioning ring are abutted against each other, the outer peripheral wall of the first positioning ring and the inner peripheral wall of the third positioning ring and the electromagnetic valve seat are further detachably connected, and the electromagnetic valve seat is detachably connected with the electromagnetic valve seat, and the electromagnetic valve seat is detachably connected.

In some embodiments, the second movable unit further comprises a gasket, the electronic control shock absorber fault analysis system comprises a second matching state, the second matching state comprises that the outer peripheral wall of the first movable unit is detachably connected with the inner peripheral wall of the electromagnetic valve barrel, one end face of the gasket is in abutting connection with one end face of the movable pipe body, which is far away from the electromagnetic valve seat, and the difference between the distance from one side of the gasket, which is far away from the movable pipe body, to the electromagnetic valve seat and the distance from one end of the first movable unit, which is far away from the electromagnetic valve seat, to the electromagnetic valve seat is within a set range.

In order to solve the problem of difficult fault analysis of the electric control shock absorber, the invention has the following advantages:

When the first working curve of the electric control shock absorber is outside the first standard area, the electric control shock absorber is proved to be faulty, in order to avoid the influence of the electromagnetic valve body, the tool assembly is adopted to replace the electromagnetic valve body to block the middle cavity and the outer cavity, and the electromagnetic valve body is closed relative to the current which passes through the electromagnetic valve body, so that the electromagnetic valve body can be effectively prevented from being damaged in the test process. When the tool assembly and the damping assembly enter a first matching state, the piston rod drives the restoration unit to reciprocate, a second working curve of the electric control damper is obtained, and when the second working curve is located in a second standard area, the compression unit and the restoration unit can be determined to be normal, and the electromagnetic valve body is abnormal. By using the tool assembly to replace the electromagnetic valve body for testing, the internal coil of the electromagnetic valve body is prevented from being burnt out due to long-time high-current testing, and the reasons of abnormal damping force values of the electric control shock absorber, namely faults of the compression unit and the recovery unit or faults of the electromagnetic valve body, can be accurately analyzed, so that the efficiency and the accuracy of fault analysis of the electric control shock absorber are improved.

Drawings

FIG. 1 is a schematic diagram of a method for analyzing faults of an electronically controlled shock absorber according to one embodiment;

FIG. 2 is a schematic diagram of a third mating state of an electronically controlled damper fault analysis system according to one embodiment;

FIG. 3 is a schematic diagram of a first mating state of an electronically controlled damper fault analysis system of one embodiment;

FIG. 4 is a schematic diagram of a first mating state of an electronically controlled damper fault analysis system according to another embodiment;

FIG. 5 illustrates a partial schematic diagram of an electronically controlled damper fault analysis system of one embodiment;

FIG. 6 illustrates a partially enlarged schematic view of the encircled portion of FIG. 2 in accordance with one embodiment;

FIG. 7 illustrates a second activity module schematic of an embodiment;

FIG. 8 illustrates a first end cap schematic view of an embodiment;

fig. 9 shows a schematic diagram of a gasket of an embodiment.

Reference numerals 10 damper assembly, 11 damper 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 orifice, 133 second orifice, 14 return unit, 141 return valve body, 142 third orifice, 143 fourth orifice, 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 first moving unit, 211 first moving module, 2111 first positioning ring, 2112 second positioning ring, 2113 third positioning ring, 212 second sealing module, 22 second moving unit, 221 second moving module, 2211 moving cylinder, 222 third sealing module, 223 fourth sealing module, 224 gasket, 23 first positioning unit, 231 first end cover, 2311 end cover, 2312 center hole, 2313 end cover circumferential hole, 232 rod, 24 second positioning unit, 241, second positioning unit, 231 first end cover 30 spring.

Detailed Description

The disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those of ordinary skill in the art to better understand and thus practice the present disclosure, and are not meant to imply any limitation on the scope of the present disclosure.

As used herein, the term "comprising" and variants thereof are to be interpreted as meaning "including but not limited to" open-ended terms. 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 terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "transverse", "longitudinal", etc. refer to an orientation or positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, they may be fixedly connected, detachably connected, or of unitary construction, they may be mechanically or electrically connected, they may be directly connected, or they may be indirectly connected through intermediaries, or they may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

In the present embodiment, during failure analysis of the electric shock absorber, since the normally open solenoid valve body 30 needs to be kept in a closed state during the test, it is necessary to apply a large current to the solenoid valve body 30 on the one hand, and on the other hand, it is difficult for the solenoid valve body 30 to reach a fully closed state. The long-time high-current test can also cause the coil of the electromagnetic valve body 30 to overheat, and the risk of burning the coil exists, so that the test cost is increased, and whether the passive valve system is abnormal or not can not be accurately judged due to the test interruption. Therefore, how to perform fault analysis on the damping electric control shock absorber on the premise of not applying excessive current to the electromagnetic valve body 30 and avoiding overheating and burning of the coil is a problem to be solved in the technical field of the electric control shock absorber. The fault analysis system of the electric control shock absorber can comprise the electric control shock absorber, a power assembly and a detection assembly. The electrically controlled damper may include a damper assembly 10, a tooling assembly 20, and a solenoid valve body 30. The shock 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 shown in fig. 2 and 6, 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 barrel 115 may be detachably connected to the barrel cover 116. The inner peripheral wall of the outer cylinder 115 may enclose an outer chamber with the cylinder cover 116 side. 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 barrel 111 is located within the outer chamber. The inner peripheral wall of the inner tube 111, the tube cover 116 side, and the compression unit 13 side may enclose an inner chamber. The middle cylinder 113 may be detachably connected with the inner cylinder 111. The middle cylinder 113 may be disposed between the inner cylinder 111 and the outer cylinder 115. The inner peripheral wall of the middle tube 113 and a portion of the outer peripheral wall of the inner tube 111 may enclose a middle chamber. The first through hole 112 may communicate with the inner chamber and the middle chamber, and the second through hole 114 may communicate with the middle chamber and the outer chamber. The base unit 15 may be disposed at the second through hole 114. The power assembly can drive the piston rod 12 to move, and the detection assembly can acquire parameters such as damping force, speed and displacement of the piston rod 12. The electronically controlled damper fault analysis system may include a first mating state, a third mating state. The first mating state may include the solenoid valve body 30 being separated from the base unit 15, the tooling assembly 20 being detachably connected to the base unit 15, the tooling assembly 20 blocking communication between the middle chamber and the outer chamber, and 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, the solenoid valve body 30 controlling the flow of fluid at the second through hole 114.

As shown in fig. 1, the method for analyzing the failure of the electronically controlled shock absorber may include:

In step S10, the failure analysis system of the electric shock absorber is in the third matching state under the initial condition, and the piston rod 12 is driven to move to obtain the first working curve of the electric shock absorber, so that the electromagnetic valve body 30 can be separated from the shock absorbing assembly 10 based on the first working curve of the electric shock absorber being outside the first standard area. The first working curve may be a damping force-speed curve and a damping force-displacement curve of the piston rod 12 in the third matching state of the electric control shock absorber fault analysis system, and the first standard region may be a maximum distribution region of the damping force-speed curve and the damping force-displacement curve of the piston rod 12 in the third matching state of the electric control shock absorber fault analysis system. When the first operating curve of the electrically controlled damper is outside the first standard region, it is verified that the electrically controlled damper is malfunctioning, i.e., the compression unit 13, the recovery unit 14, or the solenoid valve body 30 is malfunctioning. By separating the solenoid valve body 30 from the shock absorbing assembly 10, interference of the solenoid valve body 30 is eliminated during subsequent testing.

In step S20, based on the separation of the solenoid valve body 30 from the shock absorbing assembly 10, the electronically controlled shock absorber failure analysis system is driven into the first mating state, thereby facilitating the analysis of whether the compression unit 13 and the recovery unit 14 fail. Wherein, the first mating state includes the separation of the solenoid valve body 30 and the base unit 15, the tool assembly 20 is detachably connected with the base unit 15, and the tool assembly 20 separates the middle chamber from the outer chamber.

Step S30, based on the failure analysis system of the electric control shock absorber entering the first matching state, the piston rod 12 drives the restoring unit 14 to reciprocate, and a second working curve of the electric control shock absorber is obtained. Wherein, the second working curve can be a damping force-speed curve and a damping force-displacement curve of the piston rod 12 under the first matching state of the fault analysis system of the electric control shock absorber;

And step S40, acquiring first fault information of the electric control shock absorber based on the fact that the second working curve is located in the second standard area. Wherein, the first fault information of the electric control shock absorber comprises that the compression unit 13 and the recovery unit 14 are normal, and the electromagnetic valve body 30 is abnormal. The second standard region may be a maximum distribution region of the damping force-velocity curve and the damping force-displacement curve of the piston rod 12 in the first mating state of the electronically controlled shock absorber failure analysis system. When the second working curve of the electric control shock absorber is in the second standard region, the compression unit 13 and the recovery unit 14 are proved to be normal, and the electromagnetic valve body 30 is abnormal. By using the tool assembly 20 to replace the electromagnetic valve body 30 for testing, the internal coil of the electromagnetic valve body 30 is prevented from being burnt out due to long-time high-current testing, and the reasons of abnormal damping force values of the electric control shock absorber can be accurately analyzed, so that the efficiency and the accuracy of fault analysis of the electric control shock absorber are improved.

In this embodiment, as shown in fig. 5, in step S20, the tool assembly 20 separating the middle chamber from the outer chamber may include that the outer circumferential wall of the first movable unit 21 is detachably connected with the inner circumferential wall of the solenoid valve cylinder 151, the inner rod 232 may penetrate the solenoid valve seat 152, one end of the second movable unit 22, which is close to the solenoid valve seat 152, may abut against the solenoid valve seat 152, wherein the base unit 15 may include the solenoid valve cylinder 151 and the solenoid valve seat 152, the tool assembly 20 may include the first movable unit 21, the second movable unit 22 and the first positioning unit 23, the inner circumferential wall of the first movable unit 21 and the outer circumferential wall of the second movable unit 22 may be slidably connected, the first positioning unit 23 may include the inner rod 232, and the inner rod 232 and the inner circumferential wall of the second movable unit 22 may be slidably connected. The inner rod 232 may be used for positioning of the second movable unit 22, ensuring that the end of the second movable unit 22 near the solenoid valve seat 152 may abut the solenoid valve seat 152.

In other embodiments, a member having a sealing function may be included between one end of the second movable unit 22 and the electromagnetic 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 electromagnetic 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, so as to increase the tightness of the tool assembly 20, separate the inner chamber from the outer chamber, and ensure the accuracy of the analysis result.

In this embodiment, the step S20 may include:

In step S21, the outer peripheral wall of the first movable unit 21 may be detachably connected to the inner peripheral wall of the solenoid valve cylinder 151 based on the separation of the solenoid valve body 30 from the damper assembly 10. As shown in fig. 5, 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 a solenoid valve cartridge 151, a solenoid valve seat 152, and a first sealing module 153. The electromagnetic valve seat 152 is provided in a ring shape, the electromagnetic valve seat 152 can be detachably connected with the outer peripheral wall of the middle cylinder 113 around the second through hole 114, the electromagnetic valve cylinder 151 can be fixedly connected with the outer peripheral wall of the outer cylinder 115 around the second through hole 114, the first sealing module 153 can be provided in a ring shape, and the first sealing module 153 is arranged on one side of the electromagnetic valve seat 152 far away from the middle cylinder 113. The first movable unit 21 may provide a guide for the installation of the second movable unit 22. A second sealing module 212 may be included between the outer circumferential wall of the first movable unit 21 and the inner circumferential wall of the solenoid valve cylinder 151, thereby increasing the sealability of the connection between the outer circumferential wall of the first movable unit 21 and the inner circumferential wall of the solenoid valve cylinder 151, and avoiding the fluid loss of the outer chamber.

In step S22, the second movable unit 22 moves along the inner peripheral wall of the first movable unit 21 in the direction of the electromagnetic valve seat 152, based on the abutment of the outer peripheral wall of the first movable unit 21 with the inner peripheral wall portion of the electromagnetic valve cylinder 151. The second movable unit 22 may include a second movable module 221 and a spacer 224, and as shown in fig. 7, the second movable module 221 may include a movable body 2211 and a movable column 2212. The movable column 2212 is fixedly connected with one end of the movable tube 2211. As shown in fig. 5, 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 sealability 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, and avoiding the fluid loss of the outer chamber. The shims 224 may be sized differently depending on thickness, thereby allowing the tooling assembly 20 to fit solenoid valve cartridges 151 of different heights.

In step S23, the electronically controlled damper fault analysis system is brought into the second mating state based on the abutment of the end of the movable tube 2211, which is close to the solenoid valve seat 152, with the solenoid valve seat 152. The second mating state may include that the tool assembly 20 is detachably connected with the base unit 15, an end surface of the gasket 224 abuts against an end surface of the movable tube 2211 far away from the electromagnetic valve seat 152, and a difference between a distance from a side of the gasket 224 far away from the movable tube 2211 to the electromagnetic valve seat 152 and a distance from an end of the first movable unit 21 far away from the electromagnetic valve seat 152 to the electromagnetic valve seat 152 is within a set range. When the fault analysis system of the electric control shock absorber enters the second matching state, one end, close to the electromagnetic valve seat 152, of the second movable unit 22 after the installation of the tool assembly 20 can be enabled to be abutted against the electromagnetic valve seat 152, and therefore isolation of the middle chamber and the outer chamber is achieved. The first sealing module 153 is located between the electromagnetic valve seat 152 and the end face of the movable pipe 2211 near the electromagnetic valve seat 152, and can increase the sealing property between the electromagnetic valve seat 152 and the end face of the movable pipe 2211.

In step S24, the first positioning unit 23 is moved along the inner peripheral wall of the movable tube 2211 toward the electromagnetic valve seat 152 based on the failure analysis system of the electronic control damper entering the second mating state. The first positioning unit 23 may include a first end cap 231, an inner rod 232, among others. The first end cap 231 and the inner rod 232 may be detachably connected. As shown in fig. 8, the first endcap 231 may include an endcap body 2311, an endcap central aperture 2312, and an endcap circumferential aperture 2313. The inner rod 232 is removably attached to the first end cap 231 through the end cap central aperture 2312. The movable cylinder 2212 passes through the end cap circumferential hole 2313. Spacer 224 is positioned between first end cap 231 and movable tube 2211 to allow for adjustment of the distance between movable tube 2211 and first end cap 231.

In step S25, the first end cap 231 is detachably connected to the first movable unit 21, and the spring 242 is fitted over the movable cylinder 2212, based on the abutment of the first end cap 231 with the side of the spacer 224 adjacent to the first end cap 231, and the abutment of the outer peripheral wall of the inner rod 232 adjacent to the end of the electromagnetic valve seat 152 with the inner peripheral wall of the electromagnetic valve seat 152. The outer peripheral wall of the end of the inner rod 232, which is close to the electromagnetic valve seat 152, is abutted against the inner peripheral wall of the electromagnetic valve seat 152, so that the positioning accuracy of the second movable unit 22 can be improved, and the situation that the end surface of the end of the second movable unit 22, which is close to the electromagnetic valve seat 152, is not completely overlapped with the electromagnetic valve seat 152 is avoided, so that the separation between the middle chamber and the outer chamber is insufficient. A third sealing module 222 may be included between the inner rod 232 and the inner wall of the second movable unit 22, thereby increasing the tightness between the inner rod 232 and the inner wall of the second movable unit 22 and avoiding fluid loss. Removably coupling the first end cap 231 to the first movable unit 21 fixes the positions of the first end cap 231 and the first movable unit 21 with respect to each other.

In step S26, the second end cap 241 may be detachably connected to the movable column 2212 based on the detachable connection of the first end cap 231 to the first movable unit 21 and the spring 242 being fitted over the movable column 2212. Wherein, when the second end cap 241 is detachably connected to the movable cylinder 2212, the length of the spring 242 may be compressed. At this time, the spring 242 applies pressure to the first positioning unit 23 in a direction toward the base unit 15 on one hand and applies pressure to the second movable unit 22 in a direction away from the base unit 15 on the other hand, so that the position of the side, away from the base unit 15, of the first movable unit 21 and the position of the side, away from the base unit 15, of the spacer 224 are kept relatively definite, stability of the tool assembly 20 is increased, and the tool assembly 20 is also convenient to be removed from the base unit 15.

Step S27, based on the detachable connection between the second end cover 241 and the movable column 2212, the tool assembly 20 and the shock absorbing assembly 10 enter the first matching state, so as to smoothly separate the middle chamber from the outer chamber, and facilitate the smooth implementation of the subsequent testing steps.

In this embodiment, the method for analyzing the failure of the electronically controlled damper may further include:

Step S50, obtaining second fault information of the electronically controlled damper based on the second working curve being outside the second standard area, where the second fault information may include anomalies of the compression unit 13 and the recovery unit 14. When the second working curve is located or partially located outside the second standard region, it is indicated that the compression unit 13 and the recovery unit 14 are abnormal, and the cause of the failure of the electronically controlled damper is further analyzed.

Step S60, based on the second failure information of the electrically controlled damper, it is detected whether the solenoid valve body 30 is normal. When the compression unit 13 and the recovery unit 14 are abnormal, it cannot be determined whether the solenoid valve body 30 is normal. It is possible to further detect whether the solenoid valve body 30 is normal, thereby analyzing the failure condition of the electronic control shock absorber more comprehensively.

The embodiment provides an electric control shock absorber fault analysis system, which is applied to the electric control shock absorber fault analysis method of any embodiment, and the electric control shock absorber fault analysis system can comprise a shock absorption component 10, a tool component 20, an electromagnetic valve body 30, a power component and a detection component.

As shown in fig. 2, the shock absorbing assembly 10 may include a shock absorbing cylinder 11, a piston rod 12, a compression unit 13, a restoring unit 14, and a base unit 15. As shown in fig. 2 and 6, 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 provided in a cylindrical shape, and one end of the outer cylinder 115 may be detachably connected with the cylinder cover 116. The inner peripheral wall of the outer cylinder 115 may enclose an outer chamber with the cylinder cover 116 side. The inner tube 111 may be provided in a cylindrical shape, one end of the inner tube 111 may be detachably connected to the tube cover 116, and the other end of the inner tube 111 may be detachably connected to the compression unit 13. The inner barrel 111 may be located within the outer chamber. The inner peripheral wall of the inner tube 111, the tube cover 116 side, and the compression unit 13 side may enclose an inner chamber. The middle cylinder 113 may be detachably connected with the inner cylinder 111. The middle cylinder 113 may be disposed between the inner cylinder 111 and the outer cylinder 115. The inner peripheral wall of the middle tube 113 may enclose a middle chamber with a part of the outer peripheral wall of the inner tube 111. The first through hole 112 may penetrate the sidewall of the inner cylinder 111. The first through hole 112 may communicate the inner chamber with the middle chamber. The second through hole 114 may extend through a sidewall of the middle cylinder 113. The second through hole 114 may communicate the middle chamber with the outer chamber. One end of piston rod 12 may extend through cap 116 into the interior chamber. Piston rod 12 may be slidably coupled to cap 116. One end of the piston rod 12 may be detachably connected with the restoring unit 14. The reconstitution unit 14 may be located within an internal chamber. The restoring unit 14 may be slidably coupled with the sidewall of the inner cylinder 111. The reconstitution unit 14 may divide the internal chamber into two parts. The inner chamber on the side of the restoring unit 14 near the cover 116 may be an upper inner chamber, and the inner chamber on the side of the restoring unit 14 far from the cover 116 may be a lower inner chamber. The base unit 15 may include a solenoid valve cartridge 151, a solenoid valve seat 152. The solenoid valve seat 152 may be detachably connected to the outer peripheral wall of the middle tube 113 around the second through hole 114. The solenoid valve cylinder 151 may be fixedly connected to the outer circumferential wall of the outer cylinder 115 around the second through hole 114. The solenoid valve cylinder 151 may be provided in a cylindrical shape, and the solenoid valve seat 152 may be provided in an annular shape.

Tooling assembly 20 may be used to separate the middle chamber from the outer chamber.

Solenoid valve body 30 may control the amount of fluid flow through second throughbore 114.

The power assembly can be in driving connection with the piston rod 12 to drive the piston rod 12 to reciprocate along the axial direction of the inner cylinder 111.

The detection component acquires force, speed and displacement parameters in the movement process of the piston rod 12, so that a damping force-speed curve and a damping force-displacement curve of the piston rod 12 are drawn, and the judgment of whether the electric control shock absorber operates normally is facilitated.

The electronically controlled damper fault analysis system may include a first mating state, a third mating state. As shown in fig. 3 and 4, the first mating state may include the solenoid valve body 30 being separated from the base unit 15, the tool assembly 20 being detachably connected to the base unit 15, and the tool assembly 20 separating the middle chamber from the outer chamber. As shown in fig. 2, the third mating state may include the tool assembly 20 being separated from the base unit 15, the solenoid valve body 30 being detachably connected to the base unit 15, the solenoid valve body 30 controlling the flow rate at the second through hole 114.

In the present embodiment, as shown in fig. 2, the compression unit 13 may include a compression valve body 131, a first orifice 132, and a second orifice 133. The first orifice 132 may extend through the compression valve body 131, the second orifice 133 may extend through the compression valve body 131, and the first orifice 132 and the second orifice 133 may not overlap. The first orifice 132 may communicate the lower inner chamber with the outer chamber, and the second orifice 133 may communicate the lower inner chamber with the outer chamber. The recovery unit 14 may include a recovery valve body 141, a third orifice 142, and a fourth orifice 143. The third orifice 142 may penetrate the restoration valve body 141, and the fourth orifice 143 may penetrate the restoration valve body 141, with the third orifice 142 and the fourth orifice 143 not overlapping. The third orifice 142 may communicate with the upper and lower inner chambers, and the fourth orifice 143 may communicate with the upper and lower inner chambers. The piston rod 12 may be detachably connected to the reset valve body 141. The electronically controlled damper fault analysis system may include a compression stage and a recovery stage. The compression stage may include the piston rod 12 driving the restoring unit 14 to move in the axial direction of the inner chamber toward the compressing unit 13, the first orifice 132 and the fourth orifice 143 being in the conductive state, the second orifice 133 and the third orifice 142 being in the closed state. A portion of the fluid in the lower inner chamber during the compression stage enters the outer chamber through the first orifice 132 and another portion of the fluid enters the upper inner chamber through the third orifice 142, enters the middle chamber through the first through hole 112, and enters the outer chamber through the second through hole 114. The recovery stage may include the piston rod 12 driving the recovery unit 14 to move in the axial direction of the inner chamber in a direction away from the compression unit 13, the second orifice 133 and the third orifice 142 being in a conductive state, the first orifice 132 and the fourth orifice 143 being in a closed state. Part of the fluid in the outer chamber during the recovery stage enters the lower inner chamber through the second orifice 133, 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 orifice 142. When the vehicle drives the piston rod 12 to reciprocate due to vibration, the liquid in the inner chamber limits the reciprocating speed and displacement of the piston rod 12, so that the damping effect is achieved.

In this embodiment, as shown in fig. 5, 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, a second sealing module 212. The second sealing module 212 may be provided in a ring shape. The second sealing module 212 may be disposed circumferentially along the outer circumferential 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. As shown in fig. 7, the second movable module 221 may include a movable body 2211, a movable column 2212. the movable cylinder 2212 may be fixedly connected to one end of the movable tube 2211. The outer circumference of the movable tube 2211 may be matched with the inner circumference of the first movable module 211. The outer circumferential wall of the movable tube 2211 may be slidably connected with the inner circumferential wall of the first movable module 211. The third sealing module 222 and the fourth sealing module 223 may each be provided in a ring shape. The third sealing module 222 may be circumferentially disposed along the outer circumferential wall of the movable tube 2211. The fourth sealing module 223 may be disposed circumferentially along the inner circumferential wall of the movable tube 2211. The first positioning unit 23 may include a first end cap 231, an inner rod 232. As shown in fig. 8, the first end cap 231 includes an end cap body 2311, an end cap center hole 2312, and an end cap circumferential hole 2313. The end cap body 2311 is detachably coupled to one end of the inner rod 232 through the end cap center hole 2312. The diameter of the inner stem 232 may match the inner diameter of the movable tube 2211 and the diameter of the inner stem 232 may match the inner diameter of the solenoid valve seat 152. The inner rod 232 may be slidably coupled to the inner circumferential wall of the movable tube 2211. The movable cylinder 2212 may pass through the end cap circumferential hole 2313. The second positioning unit 24 may include a second end cap 241, a spring 242. The diameter of the spring 242 may match the diameter of the movable cylinder 2212. The spring 242 may be sleeved on the movable column 2212. The second end cap 241 may be detachably coupled to the movable cylinder 2212. One end of the spring 242 may abut against the first end cap 231, and the other end may abut against the second end cap 241. Wherein, when the second end cap 241 is detachably coupled to the movable cylinder 2212, the length of the spring 242 is compressed. At this time, the spring 242 applies pressure to the first end cap 231 in a direction toward the second movable unit 22 on one hand, and applies pressure to the second movable unit 22 in a direction toward the first end cap 231 on the other hand, so that the second movable unit 22 is kept in abutment with the first end cap 231, and the position of the second movable unit 22 and the first movable unit 21 is relatively determined, thereby increasing stability of the tool assembly 20 and facilitating removal of the tool assembly 20 from the base unit 15. The first matching state further includes that the outer peripheral wall of the first movable module 211 is detachably connected with the inner peripheral wall of the electromagnetic valve barrel 151, one end of the inner rod 232 is movably connected with the inner peripheral wall of the electromagnetic valve seat 152, and one end of the movable tube 2211, which is close to the electromagnetic valve seat 152, is abutted against the electromagnetic valve seat 152.

In this embodiment, as shown in fig. 5, the base unit 15 may further include a first sealing module 153, so as to improve the sealing performance at the critical point when the second movable unit 22 or the solenoid valve body 30 abuts against the solenoid valve seat 152. The first sealing module 153 may be provided in a ring shape. The first sealing module 153 may be disposed at a side of the electromagnetic valve seat 152 remote from the middle tube 113. Solenoid valve cartridge 151 may include a first cylinder 1511, a second cylinder 1512, and a third cylinder 1513. First cylinder 1511, second cylinder 1512, and third cylinder 1513 may be fixedly connected in sequence. The inner diameters of first cylinder 1511, second cylinder 1512, and third cylinder 1513 may sequentially increase. The first cylinder 1511 may be fixedly connected to an outer peripheral wall of the outer cylinder 115 around the second through hole 114. The first activity 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 may be fixedly connected in sequence. The first mating state may further include an outer circumferential wall of the first positioning ring 2111 being spaced apart from an inner circumferential wall of the first cylinder 1511, an outer circumferential wall of the second positioning ring 2112 being in contact with an inner circumferential wall of the second cylinder 1512, an outer circumferential wall of the third positioning ring 2113 being detachably connected to an inner circumferential wall of the third cylinder 1513. The second positioning module may be disposed at the abutment of the outer peripheral side of the second positioning ring 2112 with the inner peripheral side of the second cylinder 1512 to facilitate increased tightness and avoid fluid loss. When one end of the second movable unit 22, which is 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 press the first sealing module 153, so that the sealing effect of the abutting part of the second movable unit 22 and the electromagnetic valve seat 152 is improved, and the fluid of the middle chamber and the outer chamber is effectively separated. The third mating state may further include an end of the solenoid valve body 30 adjacent to the solenoid valve seat 152 abutting the solenoid valve seat 152, the solenoid valve body 30 being detachably connected to an inner peripheral wall of the first cylinder 1511. When the end of the solenoid valve body 30, which is close to the solenoid valve seat 152, is abutted against the solenoid valve seat 152, the solenoid valve body 30 and the solenoid valve seat 152 squeeze the first sealing module 153, so that a good sealing effect is achieved at the abutted position of the solenoid valve body 30 and the solenoid valve seat 152.

In this embodiment, as shown in fig. 9, the second movable unit 22 may further include a spacer 224. The gaskets 224 may be divided into different specifications according to thickness, and the gaskets 224 with different specifications are adopted for the solenoid valve cylinders 151 with different heights, so that the fault analysis system of the electric control damper enters the second matching state. The second mating state of the electronically controlled damper failure analysis system may include that the outer peripheral wall of the first movable unit 21 is detachably connected with the inner peripheral wall of the solenoid valve cylinder 151, an end surface of the gasket 224 abuts against an end surface of the movable tube 2211 remote from the solenoid valve seat 152, and a difference between a distance from a side of the gasket 224 remote from the movable tube 2211 to the solenoid valve seat 152 and a distance from an end of the first movable unit 21 remote from the solenoid valve seat 152 to the solenoid valve seat 152 is within a set range. Since the first sealing module 153 is disposed 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 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 the set range, the tightness between the second movable unit 22 and the electromagnetic valve seat 152 can be made to meet the test requirement. By providing the second movable unit 22 further comprising shims 224 to accommodate solenoid valve cartridges 151 of different heights, the flexibility and accuracy of failure analysis of the electronically controlled shock absorber is improved.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of implementing the disclosure, and that various changes in form and details may be made therein without departing from the scope of the disclosure.

Claims

1. The fault analysis method for the electric control shock absorber is characterized by comprising the following steps of:

2. The method for analyzing faults of an electrically controlled damper according to claim 1, wherein,

In the step S20, the tool assembly separates the middle chamber from the outer chamber and comprises a first movable unit, the outer peripheral wall of which is detachably connected with the inner peripheral wall of the electromagnetic valve cylinder, an inner rod penetrates through the electromagnetic valve seat, one end, close to the electromagnetic valve seat, of the second movable unit is abutted to the electromagnetic valve seat, the base unit comprises the electromagnetic valve cylinder and the electromagnetic valve seat, the tool assembly comprises 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 with the outer peripheral wall of the second movable unit, the first positioning unit comprises an inner rod, and the inner rod is slidably connected with the inner peripheral wall of the second movable unit.

3. The method for analyzing faults of an electrically controlled damper according to claim 1, wherein,

The step S20 includes:

4. The method for analyzing faults of an electrically controlled damper according to claim 1, wherein,

The fault analysis method of the electric control shock absorber further comprises the following steps:

5. The method for analyzing a failure of an electrically controlled damper according to claim 4, wherein,

6. An electronically controlled damper fault analysis system, wherein the electronically controlled damper fault analysis system is applied to an electronically controlled damper fault analysis method as claimed in any one of claims 1 to 5, the electronically controlled damper fault analysis system comprising:

A tooling assembly;

an electromagnetic valve body;

the power assembly is in driving connection with the piston rod;

7. The electrically controlled damper failure analysis system of claim 6 wherein,

The compression unit comprises a compression valve body, a first throttling hole and a second throttling hole; the first orifice penetrates through the compression valve body, the second orifice penetrates through the compression valve body, the first orifice is communicated with the lower inner chamber and the outer chamber, the second orifice is communicated with the lower inner chamber and the outer chamber, the restoring unit comprises a restoring valve body, a third orifice and a fourth orifice, the third orifice penetrates through the restoring valve body, the fourth orifice penetrates through the restoring valve body, the third orifice is communicated with the upper inner chamber and the lower inner chamber, the fourth orifice is communicated with the upper inner chamber and the lower inner chamber, the piston rod is detachably connected with the restoring valve body, the electronic shock absorber fault analysis system comprises a compression stage and a restoring stage, the compression stage comprises the piston rod driving the restoring unit to move in the inner chamber towards the compression unit along the axial direction, the first orifice and the fourth orifice are in a conducting state, the second orifice and the third are in a closing state, the restoring stage comprises the piston rod driving the restoring unit to move in the axial direction towards the inner chamber, the second orifice and the fourth orifice are in a conducting state, and the piston rod driving the piston rod is in a closing state and the piston rod driving the piston rod is in a conducting state and the fourth orifice is in a closing state.

8. The electrically controlled damper failure analysis system of claim 6 wherein,

The tool assembly comprises a first movable unit, a second movable unit, a first positioning unit and a second positioning unit; the first movable unit comprises 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 along the circumferential direction of the outer circumferential wall of the first movable module, the second movable unit comprises a second movable module, a third sealing module and a fourth sealing module, the second movable module comprises a movable pipe body and a movable column, the movable column is fixedly connected to one end of the movable pipe body, the outer circumferential diameter of the movable pipe body is matched with the inner circumferential diameter of the first movable module, the outer circumferential wall of the movable pipe body is in sliding connection with the inner circumferential wall of the first movable module, the third sealing module and the fourth sealing module are all arranged in an annular shape, the third sealing module is arranged along the circumferential direction of the outer circumferential wall of the movable pipe body, the fourth sealing module is arranged along the circumferential direction of the inner circumferential wall of the movable pipe body, the first positioning unit comprises a first end cover and an inner rod, the first end cover comprises an end cover body, a central hole and an end cover circumferential hole, the first end cover is in circumferential connection with the inner circumferential wall of the movable pipe body, the inner circumferential wall of the movable pipe body is in sliding connection with the inner circumferential wall of the first movable pipe body and the inner circumferential wall of the first movable pipe, the inner circumferential wall of the first positioning unit is in a sliding connection with the inner circumferential wall of the movable pipe body and the inner circumferential wall of the inner end cover, the diameter of the spring is matched with that of the movable column, the spring is sleeved on the movable column, the second end cover is detachably connected with the movable column, one end of the spring is abutted against the first end cover, the other end of the spring is abutted against the second end cover, when the second end cover is in a detachable connection state with the movable column, the length of the spring is compressed, the first matching state further comprises that the outer peripheral wall of the first movable module is detachably connected with the inner peripheral wall of the electromagnetic valve barrel, one end of the inner rod is in sliding connection with the inner peripheral wall of the electromagnetic valve seat, and one end of the movable pipe body, which is close to the electromagnetic valve seat, is abutted against the electromagnetic valve seat.

9. The electrically controlled damper fault analysis system of claim 8 wherein,

The base unit further comprises a first sealing module, the first sealing module is arranged in an annular shape, the first sealing module is located on one side, far away from the middle cylinder, of the electromagnetic valve seat, the electromagnetic valve cylinder comprises a first cylinder body, a second cylinder body and a third cylinder body, the first cylinder body, the second cylinder body and the third cylinder body are sequentially and fixedly connected, the inner diameters of the first cylinder body, the second cylinder body and the third cylinder body are sequentially increased, the first cylinder body is fixedly connected with the outer peripheral wall of the outer cylinder body around the second through hole, the first movable module comprises 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 sequentially and fixedly connected, the outer peripheral wall of the first positioning ring is arranged at intervals with the inner peripheral wall of the first cylinder body, the outer peripheral wall of the second positioning ring is in contact with the inner peripheral wall of the second cylinder body, the outer peripheral wall of the third positioning ring is fixedly connected with the outer peripheral wall of the third positioning ring, and the inner peripheral wall of the third positioning ring is in contact with the electromagnetic valve seat, and the electromagnetic valve seat is in a detachable and matched state, and the electromagnetic valve seat is in close to the electromagnetic valve seat.

10. The electrically controlled damper fault analysis system of claim 8 wherein,

The second movable unit further comprises a gasket, the fault analysis system of the electric control shock absorber comprises a second matching state, the second matching state comprises that the outer peripheral wall of the first movable unit is detachably connected with the inner peripheral wall of the electromagnetic valve barrel, one end face of the gasket is abutted to the end face of the movable pipe body, away from the electromagnetic valve seat, of the movable pipe body, and the difference between the distance from one side of the gasket, away from the movable pipe body, to the electromagnetic valve seat and the distance from one end of the first movable unit, away from the electromagnetic valve seat, to the electromagnetic valve seat is within a set range.