CN110722953B - Method and system for adjusting damping force of damper - Google Patents

Method and system for adjusting damping force of damper Download PDF

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Publication number
CN110722953B
CN110722953B CN201910991452.3A CN201910991452A CN110722953B CN 110722953 B CN110722953 B CN 110722953B CN 201910991452 A CN201910991452 A CN 201910991452A CN 110722953 B CN110722953 B CN 110722953B
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China
Prior art keywords
damping force
connecting part
adjustable damper
damping
damper
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CN110722953A (en
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张晓锋
孙国
于曼华
冯永江
张加
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Airlop Beijing Automotive Technology Co ltd
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Airlop Beijing Automotive Technology Co ltd
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Publication of CN110722953A publication Critical patent/CN110722953A/en
Priority to PCT/CN2020/122007 priority patent/WO2021073651A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/06—Characteristics of dampers, e.g. mechanical dampers
    • B60G17/08—Characteristics of fluid dampers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The invention discloses a method and a system for adjusting damping force of a damper. The method comprises the following steps: arranging a pneumatic valve and an adjustable damper between the first connecting part and the second connecting part, wherein the positions of the pneumatic valve and the adjustable damper are matched; the gas output end of the pneumatic valve is connected with the gas input end of an adjusting device for adjusting the damping force of the adjustable damper; the adjusting device is connected with the adjustable damper; the pneumatic valve acquires at least one movement variable of the first connecting part relative to the second connecting part; meanwhile, the pneumatic valve drives the adjusting device to control the adjustable damper to output corresponding damping force according to the collected motion variable and/or the change of the motion variable, so that the adjustment of the damping force of the adjustable damper is realized. The technical scheme of the invention ensures that a driver does not need to manually adjust the damping force in the driving process, so that the attention of the driver is more concentrated, and the occurrence of traffic accidents can be reduced to a certain extent.

Description

Method and system for adjusting damping force of damper
Technical Field
The invention relates to the field of shock absorbers, in particular to a method and a system for adjusting damping force of a damper.
Background
In order to improve the comfort of the chassis suspension, the cab suspension and the seat suspension of the vehicle, the damping force of the damper is adjusted while the damper is applied, so that the discomfort caused by a rough road surface is reduced.
At present, the damping force of a damper is mainly adjusted in a manual adjustment mode and an electric control adjustment mode. In the manual adjustment mode, the damping force is mainly adjusted through the adjusting handle, and due to the fact that operation is inconvenient, a driver can hardly adjust the damping force through the manual adjusting handle when the driver passes through uneven road surfaces in the driving process. In the electric Control adjustment mode, a CDC (Continuous Damping Control) damper is mainly applied to a suspension system to adjust the Damping force. Although the stability and comfort of a suspension system can be well improved by the suspension control system based on the CDC damper, electronic components in the suspension control system are easily limited by installation positions in the practical application process, so that the control precision is not accurate enough and the installation and maintenance are inconvenient; in addition, the electronic components are easily limited by the space of the suspension system on the circuit layout, and the cost of the suspension control system is high, so that the suspension control system is not widely applied.
Disclosure of Invention
In view of the above, the present invention has been developed to provide a method and system for adjusting the damping force of a damper that overcomes or at least partially solves the above-mentioned problems.
According to an aspect of the present invention, there is provided a method of adjusting a damping force of a damper, the method including: arranging a pneumatic valve and an adjustable damper between a first connecting part and a second connecting part, wherein the positions of the pneumatic valve and the adjustable damper are matched; the gas output end of the pneumatic valve is connected with the gas input end of an adjusting device for adjusting the damping force of the adjustable damper; the adjusting device is connected with the adjustable damper; the pneumatic valve acquires at least one movement variable of the first connection part relative to the second connection part; meanwhile, the pneumatic valve drives the adjusting device to control the adjustable damper to output corresponding damping force according to the collected motion variable and/or the change of the motion variable, and the adjustment of the damping force of the adjustable damper is realized.
According to another aspect of the present invention, there is provided a system for adjusting a damping force of a damper, the system comprising a first connection portion, a second connection portion, at least one pneumatic valve, an adjustable damper and an adjusting device for adjusting the damping force of the adjustable damper; the pneumatic valve and the adjustable damper are arranged between the first connecting part and the second connecting part, and the positions of the pneumatic valve and the adjustable damper are matched; the gas output end of the pneumatic valve is connected with the gas input end of the adjusting device; the adjusting device is connected with the adjustable damper; the pneumatic valve is used for acquiring at least one motion variable of the first connecting part relative to the second connecting part; meanwhile, the adjusting device is driven to control the adjustable damper to output corresponding damping force according to the collected motion variable and/or the change of the motion variable, and the adjustment of the damping force of the adjustable damper is realized.
The invention has the beneficial effects that: according to the technical scheme, at least one motion variable of the first connecting part relative to the second connecting part is acquired through the pneumatic valve, the damping force of the damper is adjusted through the pneumatic valve directly driving the adjusting device in an air mode, and the damping force can be adjusted through the cooperative fit of the mechanical mechanism. In addition, the technical scheme of the invention ensures that a driver does not need to manually adjust the damping force in the driving process, so that the attention of the driver is more concentrated, and the occurrence of traffic accidents can be reduced to a certain extent.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 illustrates a flow chart of a method of adjusting a damping force of a damper according to an embodiment of the present invention;
fig. 2 shows a schematic view of position information of a first connection with respect to a second connection according to an embodiment of the invention;
FIG. 3 illustrates a functional block diagram of a system for adjusting a damping force of a damper in accordance with an embodiment of the present invention;
FIG. 4 is a functional block diagram of an adjustment device according to an embodiment of the present invention;
FIG. 5 shows a functional block diagram of another adjustment device according to an embodiment of the invention;
FIG. 6 is a functional block diagram of yet another adjustment mechanism in an embodiment in accordance with the invention;
FIG. 7 is a functional block diagram of another system for adjusting the damping force of a damper in accordance with an embodiment of the present invention;
description of the drawings: 110. a first connection portion; 120. a second connecting portion; s31, an upper damping stroke end; s32, a lower damping stroke end; s21, setting a maximum settable position; s22, setting a minimum position; s11, equilibrium upper limit position; s12, balancing a lower limit position; s00, a total damping stroke balance position; 100. a system for adjusting a damping force of the damper; 130. a pneumatic valve; 140. an adjustment device; 141. a gas compression device; 142. a wire pulling control device; 143. a gas compression device; 144. a proportional valve; 150. an adjustable damper; 160. a height adjustment device; 170. a fluid spring.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Fig. 1 is a flowchart illustrating a method of adjusting a damping force of a damper according to an embodiment of the present invention, and as shown in fig. 1, a method of adjusting a damping force of a damper includes:
step S110, arranging a pneumatic valve and an adjustable damper between the first connecting part and the second connecting part, wherein the positions of the pneumatic valve and the adjustable damper are matched; the gas output end of the pneumatic valve is connected with the gas input end of an adjusting device for adjusting the damping force of the adjustable damper; the adjusting device is connected with the adjustable damper;
in the step, the pneumatic valve is of a linear structure and comprises a driving rod and a valve body, wherein the driving rod makes reciprocating linear motion in the valve body, the driving rod is connected with the first connecting part, and the valve body is connected with the second connecting part. The adjustable damper is of a linear structure, the position of the pneumatic valve is matched with that of the adjustable damper, and the longitudinal axis of the pneumatic valve is parallel to or coincident with that of the adjustable damper, or the longitudinal axis of the pneumatic valve is not parallel to or coincident with that of the adjustable damper. Preferably, the longitudinal axis of the pneumatic valve is parallel to or coincident with the longitudinal axis of the adjustable damper. It should be noted that, the position of the pneumatic valve and the adjustable damper is not further limited in the present application, as long as the pneumatic valve can acquire the motion variable between the first connecting portion and the second connecting portion, the adjustable damper can provide the damping effect for the first connecting portion or the second connecting portion. The damping force adjusting device of the adjustable damper refers to a device for controlling the swinging direction and the swinging amplitude of an adjusting pin of the adjustable damper. The gas output end of the pneumatic valve is connected with the gas input end of the adjusting device for adjusting the damping force of the adjustable damper, so that the pneumatic valve and the adjusting device can generate gas flow connection, the pneumatic valve drives the adjusting device to execute corresponding operation, and the adjustable damper is controlled to output corresponding damping force.
In addition, if the first connection portion comprises a cab, the second connection portion comprises a chassis frame, i.e. pneumatic valves and adjustable dampers are arranged between the cab and the chassis frame. If the first connection comprises a vehicle chassis, the second connection comprises a wheel, i.e. pneumatic valves and adjustable dampers are arranged between the vehicle chassis and the wheel. If the first connection portion comprises an upper frame of the seat, the second connection portion comprises a lower frame of the seat, i.e. the pneumatic valve and the adjustable damper are arranged between the upper frame of the seat and the lower frame of the seat. If the first connection comprises a sliding cross shaft of the seat scissor frame, the second connection comprises a rotating pin of the seat scissor frame, i.e. the pneumatic valve and the adjustable damper are arranged between the sliding cross shaft of the seat scissor frame and the rotating pin of the seat scissor frame.
Step S120, the pneumatic valve acquires at least one motion variable of the first connecting part relative to the second connecting part;
in this step, the motion variables include position information of the first connection portion relative to the second connection portion, a velocity of the first connection portion relative to the second connection portion, and an acceleration of the first connection portion relative to the second connection portion. The motion variables are not further limited by this application.
And step S130, simultaneously, the pneumatic valve drives the adjusting device to control the adjustable damper to output corresponding damping force according to the collected motion variable and/or the change of the motion variable, so that the adjustment of the damping force of the adjustable damper is realized.
In this step, the change in the movement variable is determined by at least two temporally successive movement variables of the first connection relative to the second connection. After the pneumatic valve acquires the motion variable between the first connecting part and the second connecting part, or after the pneumatic valve acquires the change of the motion variable between the first connecting part and the second connecting part, or after the pneumatic valve acquires the motion variable between the first connecting part and the second connecting part and the change of the motion variable, the gas flow inside the pneumatic valve changes, because the gas output end of the pneumatic valve is connected with the gas input end of the adjusting device for adjusting the damping force of the adjustable damper, therefore, the gas flow rate inside the pneumatic valve is changed to drive the gas flow rate inside the adjusting device to change, thereby triggering the adjusting device to control the swing direction and the swing amplitude of the adjusting pin of the adjustable damper, and then the adjustable damper outputs damping force corresponding to the swinging direction and the swinging amplitude, so that the damping force of the adjustable damper can be adjusted.
According to the technical scheme, the pneumatic valve is used for acquiring at least one motion variable of the first connecting part relative to the second connecting part, the pneumatic valve is used for directly and pneumatically driving the adjusting device to adjust the damping force of the damper, and the damping force can be adjusted through the cooperative fit of the mechanical mechanism. In addition, the technical scheme of the invention ensures that a driver does not need to manually adjust the damping force in the driving process, so that the attention of the driver is more concentrated, and the occurrence of traffic accidents can be reduced to a certain extent.
It should be further noted that the adjustable damper in the present application includes a CDC damper, a PDC Damper (PDC), and the like, and the type of the adjustable damper is not further limited in the present application, and only the Damping force of the adjustable damper needs to be adjustable. In addition, the above description only exemplifies the structure of the damping force adjusting device of the adjustable damper, and other adjusting devices that can adjust the damping force of the adjustable damper are within the scope of the present application.
In some embodiments of the invention, fig. 2 shows a schematic diagram of position information of a first connection relative to a second connection according to an embodiment of the invention, as shown in fig. 2, the motion variable comprises position information of the first connection relative to the second connection; the position information comprises vertical information of the first connecting part relative to the second connecting part, or horizontal information of the first connecting part relative to the second connecting part, or vertical information and horizontal information of the first connecting part relative to the second connecting part; that is, the damping force can be adjusted not only according to the vertical information of the first connection portion relative to the second connection portion, but also according to the horizontal information of the first connection portion relative to the second connection portion, and can also be adjusted simultaneously according to the vertical information and the horizontal information of the first connection portion relative to the second connection portion. The position information of the first connecting part relative to the second connecting part is a target value of adjustment, the position information is provided by the total damping stroke of the adjustable damper, preferably, the position information of the first connecting part relative to the second connecting part corresponds to the total damping stroke of the adjustable damper according to a preset proportion, such as 1:1, 1:2, 1:3 and the like, and the proportion of the position information of the first connecting part relative to the second connecting part to the total working stroke of the pneumatic valve is not further limited by the application. The total damping stroke is bounded by an upper damping stroke end S31 and a lower damping stroke end S32; the maximum settable position S21 of the first link relative to the second link is in a range between the total damping stroke equilibrium position S00 and the upper damping stroke end S31, and the minimum settable position S22 of the first link relative to the second link is in a range between the total damping stroke equilibrium position S00 and the lower damping stroke end S32; the balance range is a sub-range of the total damping stroke range defined by the maximum settable position S21 and the minimum settable position S22, and is bounded by the balance upper limit position S11 and the balance lower limit position S12. For example, the total damping stroke range includes (-15mm, +15mm), the sub-ranges of the total damping stroke range defined by the maximum settable position S21 and the minimum settable position S22 include (-10mm, +10mm), and the equilibrium range includes (-5mm, +5 mm).
Further, adjusting the damping force according to the position information is mainly classified into the following three modes:
in the first mode, if the position information of the first connecting part relative to the second connecting part is within the balance range, the gas flow inside the pneumatic valve is not changed, therefore, the pneumatic valve does not drive the adjusting device to perform corresponding operation, and the damping force of the adjustable damper is a preset damping force, for example, the preset damping force comprises 50 newtons (N); in this case, the vehicle may be driven on a flat road surface, so that the damping force of the adjustable damper is a preset damping force, generally a smaller damping force, thereby optimizing the comfort.
A second mode in which, during a displacement of the position information of the first connecting portion with respect to the second connecting portion from the equilibrium upper limit position S11 in the direction of the maximum settable position S21 or during a displacement of the position information of the first connecting portion with respect to the second connecting portion from the equilibrium lower limit position S12 in the direction of the minimum settable position S22, the gas flow rate inside the air-operated valve is changed to change the gas flow rate inside the air-operated adjustment device, thereby controlling the adjustable damper to output a first damping force, for example, the first damping force including (50N, 1500N), which increases linearly or non-linearly as the position information of the first connecting portion with respect to the second connecting portion is changed;
in addition, during the process that the position information of the first connecting part relative to the second connecting part is displaced from the maximum settable position S21 in the direction of the equilibrium upper limit position S11, or during the process that the position information of the first connecting part relative to the second connecting part is displaced from the minimum settable position S22 in the direction of the equilibrium lower limit position S12, the gas flow rate inside the air-operated valve is changed to change the gas flow rate inside the air-driven adjusting device, so that the adjustable damper is controlled to output a first damping force, for example, the first damping force comprises (50N, 1500N), and the first damping force is linearly or non-linearly reduced along with the change of the position information of the first connecting part relative to the second connecting part;
under the two conditions, the damping force of the adjustable damper is increased or reduced according to the road condition, and the uncomfortable feeling generated on a rugged road is reduced, so that the comfort is optimal.
In the third mode, during the displacement of the position information of the first connecting part relative to the second connecting part from the maximum settable position S21 in the direction of the upper damping stroke end S31 or during the displacement of the position information of the first connecting part relative to the second connecting part from the minimum settable position S22 in the direction of the lower damping stroke end S32, the gas flow rate inside the air-operated valve is changed to change the gas flow rate inside the air-operated adjustment device, thereby controlling the adjustable damper to output a second damping force corresponding to a preset terminal impact protection coefficient, wherein the first damping force is between the preset damping force and the second damping force. For example, the damping force corresponding to the preset tip impact protection coefficient may be a maximum value of the damping force of the adjustable damper, for example, the second damping force includes 3000N. Under this kind of condition, can be to go on the road surface of violent jolting for the damping force of adjustable attenuator increases to the damping force that the terminal impact protection coefficient of predetermineeing corresponds according to the road surface condition fast, thereby avoids first connecting portion and the rigid contact of second connecting portion, promotes the travelling comfort.
In some embodiments of the invention, the movement variable further comprises a velocity and an acceleration of the first connection relative to the second connection, wherein the velocity is determinable by at least two temporally successive positions of the first connection relative to the second connection and the acceleration is determinable by at least two temporally successive velocities of the first connection relative to the second connection.
Further, if the position information of the first connection portion relative to the second connection portion is within the balance range, for example, the balance range includes (-5mm, 5mm), and the acceleration of the first connection portion relative to the second connection portion is greater than the acceleration threshold, for example, 6m/s2The pneumatic valve air-operated adjustment device controls the adjustable damper to output a third damping force, which decreases with an increase in acceleration, or which increases with a decrease in acceleration. For example, when the washboard type road surface is driven, the position information change between the first connecting part and the second connecting part is small, but the acceleration of the first connecting part relative to the second connecting part is large, in this case, the adjustable damper is controlled to output a small third damping force to weaken the uncomfortable feeling caused by the road surface excitation, and therefore good comfort is obtained. Note that the third damping force is smaller than the preset damping force 50N, and for example, the third damping force includes (10N, 45N).
In some embodiments of the present invention, after the adjustable damper outputs the damping force corresponding to the preset terminal impact protection coefficient, the adjusting device controls the gas flow of the adjusting device to decrease within the preset time, so that the gas flow inside the adjusting device hardly changes within the preset time, and the swing direction and the swing amplitude of the adjusting pin of the adjustable damper are almost kept unchanged, thereby not changing the damping force output by the adjustable damper, and realizing the delay adjustment of the damping force of the adjustable damper. In this case, a buffer period can be established in the transition process from a severely bumpy road surface to a flat road surface, so that the uncomfortable feeling generated when the high damping force is immediately changed to the low damping force is reduced, and the comfort is further improved.
Fig. 3 is a functional configuration diagram illustrating a system for adjusting a damping force of a damper according to an embodiment of the present invention, and as shown in fig. 3, a system 100 for adjusting a damping force of a damper includes a first connection portion 110, a second connection portion 120, at least one pneumatic valve 130, an adjustable damper 150, and an adjusting device 140 for adjusting a damping force of the adjustable damper; the pneumatic valve 130 and the adjustable damper 150 are disposed between the first connection portion 110 and the second connection portion 120, and the positions of the pneumatic valve 130 and the adjustable damper 150 are adapted; the gas output end of the pneumatic valve 130 is connected with the gas input end of the adjusting device 140; the adjusting device 140 is connected with the adjustable damper 150; a pneumatic valve 130 for acquiring at least one movement variable of the first connection 110 relative to the second connection 120; meanwhile, the air-driven adjusting device 140 controls the adjustable damper 150 to output a corresponding damping force according to the collected motion variable and/or the change of the motion variable, so that the adjustment of the damping force of the adjustable damper 150 is realized. Compared with the prior art that signals are collected through a sensor, then damping force signals are calculated through an electronic control unit according to the signals collected by the sensor, and then the damping force signals are sent to an execution mechanism to be subjected to damping force adjustment, so that the sensitivity of the damping force adjustment is greatly improved. In addition, the technical scheme of the invention ensures that a driver does not need to manually adjust the damping force in the driving process, so that the attention of the driver is more concentrated, and the occurrence of traffic accidents can be reduced to a certain extent.
In some embodiments of the present invention, as shown in connection with fig. 2 and 3, the motion variable includes position information of the first connection portion 110 relative to the second connection portion 120; the position information comprises vertical information and/or horizontal information; the position information comprises vertical information of the first connecting part relative to the second connecting part, or horizontal information of the first connecting part relative to the second connecting part, or vertical information and horizontal information of the first connecting part relative to the second connecting part; that is, the damping force can be adjusted not only according to the vertical information of the first connection portion relative to the second connection portion, but also according to the horizontal information of the first connection portion relative to the second connection portion, and can also be adjusted simultaneously according to the vertical information and the horizontal information of the first connection portion relative to the second connection portion. The position information of the first connecting portion 110 relative to the second connecting portion 120 is a target value of the adjustment, the position information is provided by the total damping stroke of the adjustable damper 150, preferably, the position information of the first connecting portion relative to the second connecting portion corresponds to the total damping stroke of the adjustable damper according to a preset ratio, such as 1:1, 1:2, or 1:3, etc., and the present application does not further limit the ratio of the position information of the first connecting portion relative to the second connecting portion to the total operating stroke of the air-operated valve. The total damping stroke is bounded by an upper damping stroke end S31 and a lower damping stroke end S32; the maximum settable position S21 of the first link portion 110 relative to the second link portion 120 is in a range between the total damping stroke equilibrium position S00 and the upper damping stroke end S31, and the minimum settable position S22 of the first link portion 110 relative to the second link portion 120 is in a range between the total damping stroke equilibrium position S00 and the lower damping stroke end S32; the balance range is a sub-range of the total damping stroke range defined by the maximum settable position S21 and the minimum settable position S22, and is bounded by the balance upper limit position S11 and the balance lower limit position S12. For example, the total damping stroke range includes (-15mm, +15mm), the sub-ranges of the total damping stroke range defined by the maximum settable position S21 and the minimum settable position S22 include (-10mm, +10mm), and the equilibrium range includes (-5mm, +5 mm).
In some embodiments of the present invention, adjusting the damping force according to the position information is mainly classified into the following three modes:
a first mode in which the gas flow rate inside the pneumatic valve 130 is not changed if the position information of the first connection part 110 with respect to the second connection part 120 is within the equilibrium range, and therefore, the pneumatic valve 130 does not drive the adjustment device 140 to perform the corresponding operation, and the damping force of the adjustable damper 150 is a preset damping force, for example, the preset damping force includes 50 newtons (N); in this case, the vehicle may be driven on a flat road surface, so that the damping force of the adjustable damper 150 is a preset damping force, generally a small damping force, thereby optimizing the comfort.
A second mode in which, during a displacement of the position information of the first connecting portion 110 with respect to the second connecting portion 120 from the equilibrium upper limit position S11 in the direction of the maximum settable position S21 or during a displacement of the position information of the first connecting portion 110 with respect to the second connecting portion 120 from the equilibrium lower limit position S12 in the direction of the minimum settable position S22, the gas flow rate inside the air-operated valve 130 is changed to change the gas flow rate inside the air-operated adjustment device 140, thereby controlling the adjustable damper 150 to output a first damping force, for example, the first damping force includes (50N, 1500N), which increases linearly or non-linearly as the position information of the first connecting portion 110 with respect to the second connecting portion 120 is changed;
in addition, during the displacement of the position information of the first connection part 110 with respect to the second connection part 120 from the maximum settable position S21 in the direction of the equilibrium upper limit position S11 or during the displacement of the position information of the first connection part 110 with respect to the second connection part 120 from the minimum settable position S22 in the direction of the equilibrium lower limit position S12, the gas flow rate inside the air-operated valve 130 is changed to change the gas flow rate inside the air-operated adjustment device 140, thereby controlling the adjustable damper 150 to output a first damping force, for example, the first damping force includes (50N, 1500N), which is linearly or non-linearly reduced as the position information of the first connection part 110 with respect to the second connection part 120 is changed;
under the two conditions, the damping force of the adjustable damper is increased or reduced according to the road condition, and the uncomfortable feeling generated on a rugged road is reduced, so that the comfort is optimal.
In the third mode, during the displacement of the position information of the first connecting part 110 relative to the second connecting part 120 from the maximum settable position S21 in the direction of the upper damping stroke end S31 or during the displacement of the position information of the first connecting part 110 relative to the second connecting part 120 from the minimum settable position S22 in the direction of the lower damping stroke end S32, the gas flow rate inside the pneumatic valve 130 is changed to change the gas flow rate inside the pneumatic adjustment device 140, so as to control the adjustable damper 150 to output the damping force corresponding to the preset terminal shock protection coefficient, which may be the maximum value of the damping force of the adjustable damper, for example. Under this condition, can be to go on the road surface of violent jolt for the damping force of adjustable damper increases to the second damping force that the predetermined terminal impact protection coefficient corresponds according to the road surface condition fast, and for example, the second damping force includes 3000N, and wherein first damping force is located between predetermined damping force and the second damping force, thereby avoids first connecting portion and the rigid contact of second connecting portion, promotes the travelling comfort.
In some embodiments of the invention, the movement variable further comprises a velocity and an acceleration of the first connection relative to the second connection, wherein the velocity is determinable by at least two temporally successive positions of the first connection relative to the second connection and the acceleration is determinable by at least two temporally successive velocities of the first connection relative to the second connection.
Further, if the position information of the first connection portion relative to the second connection portion is within the balance range, for example, the balance range includes (-5mm, 5mm), and the acceleration of the first connection portion relative to the second connection portion is greater than the acceleration threshold, for example, 6m/s2The pneumatic valve 130 pneumatically actuates the adjustment device 140 to control the adjustable damper to output a third damping force that decreases with increasing acceleration or that increases with decreasing acceleration. For example, when the washboard type road surface is driven, the position information change between the first connecting part and the second connecting part is small, but the acceleration of the first connecting part relative to the second connecting part is large, in this case, the adjustable damper is controlled to output a small third damping force to weaken the uncomfortable feeling caused by the road surface excitation, and therefore good comfort is obtained. Note that the third damping force is smaller than the preset damping force 50N, and for example, the third damping force includes (10N, 45N).
In some embodiments of the present invention, after the adjustable damper 150 outputs the damping force corresponding to the preset terminal impact protection coefficient, the adjusting device 140 controls the gas flow of itself to decrease within the preset time, so that the gas flow inside itself hardly changes within the preset time, and thus the swing direction and swing amplitude of the adjusting pin of the adjustable damper 150 are almost kept unchanged, and further the damping force output by the adjustable damper 150 is not changed, thereby realizing the delay adjustment of the damping force of the adjustable damper 150. In this case, a buffer period can be established in the transition process from a severely bumpy road surface to a flat road surface, so that the uncomfortable feeling generated when the high damping force is immediately changed to the low damping force is reduced, and the comfort is further improved.
Fig. 4 shows a functional structure diagram of an adjusting device according to an embodiment of the present invention, as shown in fig. 4, the adjusting device 140 includes a gas compressing device 141 and a wire control device 142 driven by the gas compressing device 141, the wire control device 142 is connected to the adjustable damper 150, specifically, the wire control device 142 is connected to an adjusting pin of the adjustable damper 150, and the wire control device 142 has a return spring driving the adjusting pin of the adjustable damper 150 to reciprocate.
The pneumatic valve 130 changes the gas flow rate inside itself according to the collected motion variable and/or the change of the motion variable to drive the state quantity of the gas information inside the gas compression device 141 and the change frequency of the state quantity, so as to change the stroke size of the gas compression device 141, and when the stroke of the gas compression device 141 becomes larger, the driving force of the wire pulling control device 142 becomes larger; when the stroke of the gas compression device 141 is reduced, the driving force of the wire pulling control device 142 is reduced, and since the return force of the wire pulling control device 142 is provided by the return spring, the return force of the wire pulling control device 142 is linearly related to the driving force of the wire pulling control device 142 without changing the return spring. Therefore, the matching relationship between the driving force and the return force of the wire pulling control device 142 can be adjusted by changing the stroke of the gas compression device 141, so as to drive the adjusting pin of the adjustable damper 150 to swing back and forth, i.e., to drive the swing direction and the swing amplitude of the adjusting pin of the adjustable damper, so as to control the adjustable damper to output a corresponding damping force, thereby realizing the adaptive adjustment of the damping force of the adjustable damper 150.
Fig. 5 shows a functional block diagram of another adjustment device according to an embodiment of the invention, as shown in fig. 5, the adjustment device 140 comprises a gas compression device 143 driven by the pneumatic valve 130, the gas compression device 143 being connected to an adjustable damper 150; specifically, the driving rod of the gas compression device 143 is connected with the adjustment pin of the adjustable damper 150; the pneumatic valve 130 changes the gas flow rate inside itself according to the collected motion variable and/or the change of the motion variable, because the pneumatic valve 130 is connected with the gas compression device 143, the gas flow rate inside the gas compression device 143 changes along with the gas flow rate inside the pneumatic valve 130, so that the stroke of the gas compression device 143 changes, that is, the relative displacement between the driving rod of the gas compression device 143 and the cylinder changes, the purpose of adjusting the stroke size of the gas compression device 143 is achieved, because the driving rod of the gas compression device 143 is connected with the adjusting pin of the adjustable damper 150, when the driving rod of the gas compression device 143 driven by the pneumatic valve 130 reciprocates in the cylinder, the driving rod of the gas compression device 143 drives the adjusting pin of the adjustable damper 150 to reciprocate by a corresponding amplitude, and the adjustable damper is controlled to output a corresponding damping force, adaptive adjustment of the damping force of the adjustable damper 150 is achieved.
It should be noted that the gas compression device 143 shown in fig. 5 has the same functional structure and operation principle as the gas compression device 141 shown in fig. 4, and both mainly include two parts, i.e., a driving rod and a cylinder. Of course, in other embodiments, the functional structure and operation principle of the gas compression device 143 and the gas compression device 141 may be different.
FIG. 6 is a functional block diagram of another adjustment device according to an embodiment of the present invention, wherein the adjustment device 140 includes a proportional valve 145, and the proportional valve 145 is connected to a valve port of a damping fluid flow-through chamber of an adjustable damper 150, as shown in FIG. 6; the pneumatic valve 130 changes the gas flow in the pneumatic valve according to the collected motion variable and/or the change of the motion variable to change the working stroke of the proportional valve 145 through pneumatic driving, so as to control the drift diameter of the valve port of the damping fluid flow through cavity of the adjustable damper 150, and because the drift diameters of the valve port of the damping fluid flow through cavity are different, the flow rate and/or the flow rate of the damping fluid are different, thereby achieving the purpose of adjusting the damping fluid flow, the damping fluid flow rate or the damping fluid flow rate and the flow rate of the adjustable damper 150, and finally controlling the adjustable damper to output a corresponding damping force, thereby achieving the adaptive adjustment of the damping force of the adjustable damper 150.
Fig. 7 is a functional configuration diagram illustrating another system for adjusting a damping force of a damper according to an embodiment of the present invention, and as shown in fig. 7, the system 100 further includes at least one height control adjusting valve 160 and at least one fluid spring 170, the height control adjusting valve 160 and the fluid spring 170 being disposed between the first connection portion 110 and the second connection portion 120, the height control adjusting valve 160 and the fluid spring 170 being connected; the height control adjustment valve 160, the fluid spring 170, and the adjustable damper 150 are adapted to the position, and the height control adjustment valve 160 is used to control the fluid spring 170 to inflate or deflate so that the position between the first connection 110 and the second connection 120 is maintained at a preset position. Such a system is suitable for a cab suspension system, wherein the first connection 110 comprises a cab, the second connection 120 comprises a chassis frame, and the pneumatic valve 130, the adjustment device 140, the adjustable damper 150, the height control adjustment valve 160 and the fluid spring 170 are arranged between the cab and the chassis frame. The position between the cab and the chassis frame is maintained at a preset position, and when the position between the cab and the frame bracket is smaller than the preset position, the height control regulating valve 160 controls the inflation of the fluid spring; when the position between the cab and the frame bracket is larger than the preset position, the height control adjusting valve 160 controls the fluid spring to deflate. Meanwhile, the pneumatic valve 130 collects position information between the cab and the frame and changes of the position information in real time, and the pneumatic driving adjusting device 140 controls the adjustable damper 150 to output corresponding damping force. The damping force adjustment of the adjustable damper has been discussed in detail above and will not be described in detail here.
It should be noted that the system for adjusting the damping force of the damper may be applied to the fields of a seat suspension system, a vehicle chassis suspension system, a cab suspension system, and the like, and the application field of the system for adjusting the damping force of the damper is not further limited in the present application.
In conclusion, the damping force adjustment can be realized through the cooperative coordination of the mechanical mechanism, and compared with the prior art that signals are collected through the sensor, the damping force signals are calculated through the electronic control unit according to the signals collected by the sensor, and then the damping force signals are sent to the executing mechanism to be adjusted, the damping force adjustment sensitivity is greatly improved. In addition, the technical scheme of the invention ensures that a driver does not need to manually adjust the damping force in the driving process, so that the attention of the driver is more concentrated, and the occurrence of traffic accidents can be reduced to a certain extent.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the above-mentioned embodiments, or some technical features can be replaced. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
The invention discloses A1, a method for adjusting damping force of a damper, which comprises the following steps:
arranging a pneumatic valve and an adjustable damper between a first connecting part and a second connecting part, wherein the positions of the pneumatic valve and the adjustable damper are matched; the gas output end of the pneumatic valve is connected with the gas input end of an adjusting device for adjusting the damping force of the adjustable damper; the adjusting device is connected with the adjustable damper;
the pneumatic valve acquires at least one movement variable of the first connection part relative to the second connection part;
meanwhile, the pneumatic valve drives the adjusting device to control the adjustable damper to output corresponding damping force according to the collected motion variable and/or the change of the motion variable, and the adjustment of the damping force of the adjustable damper is realized.
A2, method of adjusting a damping force of a damper, as in a1, wherein the motion variable comprises position information of the first connection relative to the second connection; the position information comprises vertical information and/or horizontal information;
position information of the first connection portion relative to the second connection portion is a target value of adjustment, the position information is provided by a total damping stroke of the adjustable damper, and the total damping stroke is defined by an upper damping stroke end and a lower damping stroke end;
a maximum settable position of the first connecting portion relative to the second connecting portion is in a range between the total damping stroke equilibrium position and the upper damping stroke end, and a minimum settable position of the first connecting portion relative to the second connecting portion is in a range between the total damping stroke equilibrium position and the lower damping stroke end;
the balance range is a sub-range of the total damping stroke range defined by the maximum settable position and the minimum settable position, the balance range being bounded by a balance upper limit position and a balance lower limit position.
A3 method of adjusting damping force of a damper, as in a2, wherein if the position information of the first connecting part relative to the second connecting part is within the balance range, the pneumatic valve does not drive the adjusting device to perform corresponding operation, and the damping force of the adjustable damper is a preset damping force;
during the process that the position information of the first connecting part relative to the second connecting part is displaced from the equilibrium upper limit position in the direction of the maximum settable position or during the process that the position information of the first connecting part relative to the second connecting part is displaced from the equilibrium lower limit position in the direction of the minimum settable position, the pneumatic valve pneumatically drives the adjusting device to control the adjustable damper to output a first damping force, and the first damping force linearly or nonlinearly increases as the position information of the first connecting part relative to the second connecting part changes;
during the process that the position information of the first connecting part relative to the second connecting part is displaced from the maximum settable position in the direction of the equilibrium upper limit position or during the process that the position information of the first connecting part relative to the second connecting part is displaced from the minimum settable position in the direction of the equilibrium lower limit position, the pneumatic valve pneumatically drives the adjusting device to control the adjustable damper to output a first damping force, and the first damping force is linearly or nonlinearly reduced along with the change of the position information of the first connecting part relative to the second connecting part;
during the process that the position information of the first connecting part relative to the second connecting part is displaced from the maximum settable position along the direction of the upper damping stroke end, or during the process that the position information of the first connecting part relative to the second connecting part is displaced from the minimum settable position along the direction of the lower damping stroke end, the pneumatic valve pneumatically drives the adjusting device to control the adjustable damper to output a second damping force corresponding to a preset terminal impact protection coefficient, wherein the first damping force is between the preset damping force and the second damping force.
A4 method of adjusting a damping force of a damper, as in A3, wherein the motion variables further comprise a velocity and an acceleration of the first connection relative to the second connection, wherein the velocity is determinable by at least two temporally successive positions of the first connection relative to the second connection and the acceleration is determinable by at least two temporally successive velocities of the first connection relative to the second connection.
A5, the method for adjusting damping force of a damper according to a4, wherein if the position information of the first connecting part relative to the second connecting part is in the balance range and the acceleration of the first connecting part relative to the second connecting part is greater than the acceleration threshold, the pneumatic valve air-drives the adjusting device to control the adjustable damper to output a third damping force, the third damping force decreases with the increase of the acceleration, or the third damping force increases with the decrease of the acceleration, and the third damping force is smaller than the preset damping force.
A6, the method for adjusting the damping force of a damper according to A3, wherein after the adjustable damper outputs the damping force corresponding to the preset terminal impact protection coefficient, the adjusting device controls the gas flow to decrease within a preset time, so that the damping force output by the adjustable damper is not changed within the preset time, and the delay adjustment of the damping force of the adjustable damper is realized.
The invention also discloses B7, a system for adjusting the damping force of the damper, which comprises a first connecting part, a second connecting part, at least one pneumatic valve, an adjustable damper and an adjusting device for adjusting the damping force of the adjustable damper;
the pneumatic valve and the adjustable damper are arranged between the first connecting part and the second connecting part, and the positions of the pneumatic valve and the adjustable damper are matched;
the gas output end of the pneumatic valve is connected with the gas input end of the adjusting device; the adjusting device is connected with the adjustable damper;
the pneumatic valve is used for acquiring at least one motion variable of the first connecting part relative to the second connecting part; meanwhile, the adjusting device is driven to control the adjustable damper to output corresponding damping force according to the collected motion variable and/or the change of the motion variable, and the adjustment of the damping force of the adjustable damper is realized.
B8, the system for adjusting a damping force of a damper according to B7, wherein the motion variable includes position information of the first connecting portion relative to the second connecting portion; the position information comprises vertical information and/or horizontal information;
position information of the first connection portion relative to the second connection portion is a target value of adjustment, the position information is provided by a total damping stroke of the adjustable damper, and the total damping stroke is defined by an upper damping stroke end and a lower damping stroke end;
a maximum settable position of the first connecting portion relative to the second connecting portion is in a range between the total damping stroke equilibrium position and the upper damping stroke end, and a minimum settable position of the first connecting portion relative to the second connecting portion is in a range between the total damping stroke equilibrium position and the lower damping stroke end;
the balance range is a sub-range of the total damping stroke range defined by the maximum settable position and the minimum settable position, the balance range being bounded by a balance upper limit position and a balance lower limit position.
B9, the system for adjusting the damping force of a damper according to B8, wherein if the position information of the first connecting part relative to the second connecting part is within the balance range, the pneumatic valve does not drive the adjusting device to perform corresponding operation, and the damping force of the adjustable damper is a preset damping force;
during the process that the position information of the first connecting part relative to the second connecting part is displaced from the equilibrium upper limit position in the direction of the maximum settable position or during the process that the position information of the first connecting part relative to the second connecting part is displaced from the equilibrium lower limit position in the direction of the minimum settable position, the pneumatic valve pneumatically drives the adjusting device to control the adjustable damper to output a first damping force which linearly or nonlinearly increases as the position information of the first connecting part relative to the second connecting part changes;
during the process that the position information of the first connecting part relative to the second connecting part is displaced from the maximum settable position in the direction of the equilibrium upper limit position or during the process that the position information of the first connecting part relative to the second connecting part is displaced from the minimum settable position in the direction of the equilibrium lower limit position, the pneumatic valve pneumatically drives the adjusting device to control the adjustable damper to output a first damping force, and the first damping force is linearly or nonlinearly reduced along with the change of the position information of the first connecting part relative to the second connecting part;
during the process that the position information of the first connecting part relative to the second connecting part is displaced from the maximum settable position along the direction of the upper damping stroke end, or during the process that the position information of the first connecting part relative to the second connecting part is displaced from the minimum settable position along the direction of the lower damping stroke end, the pneumatic valve drives the adjusting device to control the adjustable damper to output a second damping force corresponding to a preset terminal impact protection coefficient, wherein the first damping force is between the preset damping force and the second damping force.
B10, the system for adjusting a damping force of a damper, as in B9, wherein the motion variables further include a velocity and an acceleration of the first connection relative to the second connection, wherein the velocity is determinable by at least two temporally successive positions of the first connection relative to the second connection and the acceleration is determinable by at least two temporally successive velocities of the first connection relative to the second connection.
B11, the system for adjusting the damping force of a damper according to B10, wherein if the position information of the first connecting part relative to the second connecting part is in the balance range and the acceleration of the first connecting part relative to the second connecting part is greater than the acceleration threshold value, an air-operated valve is used for air-driving the adjusting device to control the adjustable damper to output a third damping force, the third damping force decreases with the increase of the acceleration or increases with the decrease of the acceleration, and the third damping force is smaller than the preset damping force.
B12, the system for adjusting the damping force of a damper, as B9, wherein after the adjustable damper outputs the damping force corresponding to the preset terminal impact protection coefficient, the adjusting device controls the gas flow of the adjusting device to be reduced within the preset time, so that the damping force output by the adjustable damper is not changed within the preset time, and the delay adjustment of the damping force of the adjustable damper is realized.
B13, the system for adjusting the damping force of a damper as in B7, wherein the adjusting device comprises a gas compressing device and a wire pulling control device driven by the gas compressing device, and the wire pulling control device is connected with the adjustable damper;
the pneumatic valve drives the state quantity of gas information in the gas compression device and the change frequency of the state quantity according to the collected motion variable and/or the change of the motion variable, changes the stroke size of the gas compression device, further adjusts the matching relation between the driving force and the return force of the stay wire control device, drives the adjusting pin of the adjustable damper to swing in a reciprocating mode, and achieves self-adaptive adjustment of the damping force of the adjustable damper.
B14, the system for adjusting the damping force of a damper as in B7, wherein the adjusting device comprises a gas compression device driven by the pneumatic valve, the gas compression device being connected with the adjustable damper;
the pneumatic valve drives and adjusts the stroke of the gas compression device according to the collected motion variable and/or the change of the motion variable, drives the adjusting pin of the adjustable damper to swing to and fro by a corresponding amplitude, and realizes the self-adaptive adjustment of the damping force of the adjustable damper.
B15, the system for adjusting the damping force of a damper as in B7, wherein the adjusting device comprises a proportional valve connected with a valve port of a damping liquid circulation cavity of the adjustable damper;
the pneumatic valve is driven to change the working stroke of the proportional valve according to the collected motion variable and/or the change of the motion variable, so that the drift diameter of a valve port of a damping liquid flow through cavity of the adjustable damper is controlled, the damping liquid flow and/or the flow speed of the adjustable damper is adjusted, and the self-adaptive adjustment of the damping force of the adjustable damper is realized.
B16, the system of adjusting a damping force of a damper according to B7, wherein the system further comprises at least one height control regulating valve and at least one fluid spring, the height control regulating valve and the fluid spring being arranged between a first connection and the second connection, the height control regulating valve and the fluid spring being connected;
the height control adjusting valve and the fluid spring are matched with the position of the adjustable damper, and the height control adjusting valve is used for controlling the fluid spring to inflate or deflate so that the position between the first connecting part and the second connecting part is maintained at a preset position.

Claims (12)

1. A method of adjusting a damping force of a damper, the method comprising:
arranging a pneumatic valve and an adjustable damper between a first connecting part and a second connecting part, wherein the positions of the pneumatic valve and the adjustable damper are matched; the gas output end of the pneumatic valve is connected with the gas input end of an adjusting device for adjusting the damping force of the adjustable damper; the adjusting device is connected with the adjustable damper;
the pneumatic valve acquires at least one movement variable of the first connection part relative to the second connection part;
meanwhile, the pneumatic valve drives the adjusting device to control the adjustable damper to output corresponding damping force according to the collected motion variable and/or the change of the motion variable, so that the adjustment of the damping force of the adjustable damper is realized;
the motion variable includes position information of the first connection portion relative to the second connection portion; the position information comprises vertical information and/or horizontal information;
position information of the first connection portion relative to the second connection portion is a target value of adjustment, the position information is provided by a total damping stroke of the adjustable damper, and the total damping stroke is defined by an upper damping stroke end and a lower damping stroke end;
a maximum settable position of the first connecting portion relative to the second connecting portion is in a range between the total damping stroke equilibrium position and the upper damping stroke end, and a minimum settable position of the first connecting portion relative to the second connecting portion is in a range between the total damping stroke equilibrium position and the lower damping stroke end;
the balance range is a sub-range of the total damping stroke range defined by the maximum settable position and the minimum settable position, the balance range being bounded by a balance upper limit position and a balance lower limit position;
if the position information of the first connecting part relative to the second connecting part is in the balance range, the pneumatic valve does not drive the adjusting device to execute corresponding operation, and the damping force of the adjustable damper is a preset damping force;
during the process that the position information of the first connecting part relative to the second connecting part is displaced from the equilibrium upper limit position in the direction of the maximum settable position or during the process that the position information of the first connecting part relative to the second connecting part is displaced from the equilibrium lower limit position in the direction of the minimum settable position, the pneumatic valve pneumatically drives the adjusting device to control the adjustable damper to output a first damping force, and the first damping force linearly or nonlinearly increases as the position information of the first connecting part relative to the second connecting part changes;
during the process that the position information of the first connecting part relative to the second connecting part is displaced from the maximum settable position in the direction of the equilibrium upper limit position or during the process that the position information of the first connecting part relative to the second connecting part is displaced from the minimum settable position in the direction of the equilibrium lower limit position, the pneumatic valve pneumatically drives the adjusting device to control the adjustable damper to output a first damping force, and the first damping force is linearly or nonlinearly reduced along with the change of the position information of the first connecting part relative to the second connecting part;
during the process that the position information of the first connecting part relative to the second connecting part is displaced from the maximum settable position along the direction of the upper damping stroke end, or during the process that the position information of the first connecting part relative to the second connecting part is displaced from the minimum settable position along the direction of the lower damping stroke end, the pneumatic valve pneumatically drives the adjusting device to control the adjustable damper to output a second damping force corresponding to a preset terminal impact protection coefficient, wherein the first damping force is between the preset damping force and the second damping force.
2. The method of adjusting a damping force of a damper according to claim 1, wherein the motion variables further include a velocity and an acceleration of the first connection relative to the second connection, wherein the velocity is determinable from at least two temporally successive positions of the first connection relative to the second connection and the acceleration is determinable from at least two temporally successive velocities of the first connection relative to the second connection.
3. The method of adjusting a damping force of a damper according to claim 2, wherein if the position information of the first connecting portion with respect to the second connecting portion is within the equilibrium range and the acceleration of the first connecting portion with respect to the second connecting portion is greater than an acceleration threshold, the pneumatic valve air-drives the adjusting device to control the adjustable damper to output a third damping force, which decreases as the acceleration increases, or which increases as the acceleration decreases, which is less than the preset damping force.
4. The method for adjusting the damping force of a damper according to claim 2, wherein after the adjustable damper outputs the damping force corresponding to the preset terminal impact protection coefficient, the adjusting device controls the gas flow of the adjusting device to be reduced within a preset time, so that the damping force output by the adjustable damper is not changed within the preset time, and the delay adjustment of the damping force of the adjustable damper is realized.
5. A system for adjusting a damping force of a damper, the system comprising a first connection portion, a second connection portion, at least one pneumatic valve, an adjustable damper and an adjusting device for adjusting the damping force of the adjustable damper;
the pneumatic valve and the adjustable damper are arranged between the first connecting part and the second connecting part, and the positions of the pneumatic valve and the adjustable damper are matched;
the gas output end of the pneumatic valve is connected with the gas input end of the adjusting device; the adjusting device is connected with the adjustable damper;
the pneumatic valve is used for acquiring at least one motion variable of the first connecting part relative to the second connecting part; meanwhile, the adjusting device is driven to control the adjustable damper to output corresponding damping force according to the collected motion variable and/or the change of the motion variable, so that the adjustment of the damping force of the adjustable damper is realized;
the motion variable comprises position information of the first connecting part relative to the second connecting part;
the position information comprises vertical information and/or horizontal information; position information of the first connection portion relative to the second connection portion is a target value of adjustment, the position information is provided by a total damping stroke of the adjustable damper, and the total damping stroke is defined by an upper damping stroke end and a lower damping stroke end;
a maximum settable position of the first connecting portion relative to the second connecting portion is in a range between the total damping stroke equilibrium position and the upper damping stroke end, and a minimum settable position of the first connecting portion relative to the second connecting portion is in a range between the total damping stroke equilibrium position and the lower damping stroke end;
the balance range is a sub-range of the total damping stroke range defined by the maximum settable position and the minimum settable position, the balance range being bounded by a balance upper limit position and a balance lower limit position;
if the position information of the first connecting part relative to the second connecting part is in the balance range, the pneumatic valve does not drive the adjusting device to execute corresponding operation, and the damping force of the adjustable damper is a preset damping force;
during the process that the position information of the first connecting part relative to the second connecting part is displaced from the equilibrium upper limit position in the direction of the maximum settable position or during the process that the position information of the first connecting part relative to the second connecting part is displaced from the equilibrium lower limit position in the direction of the minimum settable position, the pneumatic valve pneumatically drives the adjusting device to control the adjustable damper to output a first damping force which linearly or nonlinearly increases as the position information of the first connecting part relative to the second connecting part changes;
during the process that the position information of the first connecting part relative to the second connecting part is displaced from the maximum settable position in the direction of the equilibrium upper limit position or during the process that the position information of the first connecting part relative to the second connecting part is displaced from the minimum settable position in the direction of the equilibrium lower limit position, the pneumatic valve pneumatically drives the adjusting device to control the adjustable damper to output a first damping force, and the first damping force is linearly or nonlinearly reduced along with the change of the position information of the first connecting part relative to the second connecting part;
during the process that the position information of the first connecting part relative to the second connecting part is displaced from the maximum settable position along the direction of the upper damping stroke end, or during the process that the position information of the first connecting part relative to the second connecting part is displaced from the minimum settable position along the direction of the lower damping stroke end, the pneumatic valve drives the adjusting device to control the adjustable damper to output a second damping force corresponding to a preset terminal impact protection coefficient, wherein the first damping force is between the preset damping force and the second damping force.
6. The system of adjusting a damping force of a damper according to claim 5, wherein the motion variables further include a velocity and an acceleration of the first connection relative to the second connection, wherein the velocity is determinable from at least two temporally successive positions of the first connection relative to the second connection and the acceleration is determinable from at least two temporally successive velocities of the first connection relative to the second connection.
7. The system for adjusting the damping force of a damper according to claim 6, wherein if the position information of the first connecting portion with respect to the second connecting portion is within the equilibrium range and the acceleration of the first connecting portion with respect to the second connecting portion is greater than the acceleration threshold, the pneumatic valve is configured to pneumatically drive the adjusting device to control the adjustable damper to output a third damping force, which decreases with the increase of the acceleration or increases with the decrease of the acceleration, which is less than the preset damping force.
8. The system for adjusting the damping force of a damper according to claim 5, wherein after the adjustable damper outputs the damping force corresponding to the preset terminal impact protection coefficient, the adjusting device controls the gas flow of the adjusting device to decrease within a preset time, so that the damping force output by the adjustable damper is not changed within the preset time, and the delay adjustment of the damping force of the adjustable damper is realized.
9. The system for adjusting damping force of a damper according to claim 5,
the adjusting device comprises a gas compression device and a stay wire control device driven by the gas compression device, and the stay wire control device is connected with the adjustable damper;
the pneumatic valve drives the state quantity of gas information in the gas compression device and the change frequency of the state quantity according to the collected motion variable and/or the change of the motion variable, changes the stroke size of the gas compression device, further adjusts the matching relation between the driving force and the return force of the stay wire control device, drives the adjusting pin of the adjustable damper to swing in a reciprocating mode, and achieves self-adaptive adjustment of the damping force of the adjustable damper.
10. The system for adjusting damping force of a damper according to claim 5,
the adjusting device comprises a gas compression device driven by the pneumatic valve, and the gas compression device is connected with the adjustable damper;
the pneumatic valve drives and adjusts the stroke of the gas compression device according to the collected motion variable and/or the change of the motion variable, drives the adjusting pin of the adjustable damper to swing to and fro by a corresponding amplitude, and realizes the self-adaptive adjustment of the damping force of the adjustable damper.
11. The system for adjusting a damping force of a damper according to claim 5, wherein the adjusting means comprises a proportional valve connected to a valve port of a damping fluid circulation chamber of the adjustable damper;
the pneumatic valve is driven to change the working stroke of the proportional valve according to the collected motion variable and/or the change of the motion variable, so that the drift diameter of a valve port of a damping liquid flow through cavity of the adjustable damper is controlled, the damping liquid flow and/or the flow speed of the adjustable damper is adjusted, and the self-adaptive adjustment of the damping force of the adjustable damper is realized.
12. The system of adjusting a damping force of a damper according to claim 5, further comprising at least one height control adjustment valve and at least one fluid spring, the height control adjustment valve and the fluid spring being disposed between a first connection and the second connection, the height control adjustment valve and the fluid spring being connected;
the height control adjusting valve and the fluid spring are matched with the position of the adjustable damper, and the height control adjusting valve is used for controlling the fluid spring to inflate or deflate so that the position between the first connecting part and the second connecting part is maintained at a preset position.
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