Shock absorber and control method thereof

Abstract

The invention discloses a shock absorber and a control method thereof. A first cylinder body assembly of the shock absorber comprises an oil storage barrel and a middle cylinder arranged on the inner side of the oil storage barrel. The oil storage barrel and the middle cylinder are assembled on the first connecting part of the connecting seat; circulation holes are formed in the ends, away from the first connecting parts, of the middle cylinders; an oil way is formed between the middle cylinder and the oil storage barrel. A first electromagnetic valve, a second electromagnetic valve, a first channel and a second channel are arranged in the connecting seat; the first electromagnetic valve is assembled on the first channel; the second electromagnetic valve is assembled in the second channel; the second cylinder body is assembled on the second connecting part of the connecting seat; a floating piston is arranged in the second cylinder body; the floating piston divides the second cylinder body into a liquid storage chamber and a gas storage chamber; the gas storage chamber is arranged on the side, away from the second connecting part, of the liquid storage chamber. The liquid storage chamber is communicated with the middle cylinder through a first channel; and the liquid storage chamber is communicated with the oil path through the second channel. According to the technical scheme, the damping adjusting range of the shock absorber can be widened.

Description

Technical Field

[0001] This invention relates to the field of vibration damper technology, and in particular to a vibration damper and its control method. Background Technology

[0002] With the increasing popularity of automobiles in my country, people have higher and higher requirements for the performance of automobiles, including power, economy, braking, handling stability, and comfort. As an essential module in automobiles, shock absorbers have a significant impact on the handling stability and comfort of vehicles.

[0003] Shock absorbers can adjust their damping coefficient in real time according to the vehicle's driving conditions and road surface conditions. However, the damping adjustment range of existing shock absorbers is relatively small, which cannot meet the current vehicle requirements for handling, comfort, and safety. Summary of the Invention

[0004] This invention provides a vibration damper and its control method to improve the damping adjustment range of the vibration damper.

[0005] In a first aspect, embodiments of the present invention provide a vibration damper, comprising: a first cylinder assembly, a connecting seat, and a second cylinder arranged sequentially;

[0006] The first cylinder assembly includes an oil reservoir and an intermediate cylinder disposed inside the oil reservoir; both the oil reservoir and the intermediate cylinder are assembled to the first connecting portion of the connecting seat; a flow hole is provided at the end of the intermediate cylinder away from the first connecting portion; an oil passage is formed between the intermediate cylinder and the oil reservoir;

[0007] The connecting seat is provided with a first solenoid valve, a second solenoid valve, a first channel, and a second channel; the first solenoid valve is assembled in the first channel; the second solenoid valve is assembled in the second channel;

[0008] The second cylinder is assembled to the second connecting part of the connecting seat; a floating piston is provided in the second cylinder; the floating piston divides the second cylinder into a liquid storage chamber and a gas storage chamber; the gas storage chamber is located on the side of the liquid storage chamber away from the second connecting part; the liquid storage chamber is connected to the intermediate cylinder through the first channel; the liquid storage chamber is connected to the oil circuit through the second channel.

[0009] Secondly, embodiments of the present invention provide a vibration damper control method, applicable to vibration dampers provided in any embodiment of the present invention, wherein the vibration damper includes a control panel and a control module; the control panel includes at least a gear adjustment control.

[0010] The shock absorber includes a control panel and a control module; the control panel includes at least a rebound adjustment control and a compression adjustment control.

[0011] The vibration damper control method includes:

[0012] Based on road conditions, a compression adjustment command is input to the compression adjustment control to adjust the operating current of the first solenoid valve, and a rebound adjustment command is input to the rebound adjustment control to adjust the operating current of the second solenoid valve; the road conditions include at least highway mode, expressway mode, and mountain road mode.

[0013] In this invention, the shock absorber includes a first cylinder assembly, a connecting seat, and a second cylinder arranged sequentially. The first cylinder assembly includes a coaxially arranged central cylinder and an oil reservoir, forming an oil circuit between them. The connecting seat connects to the first cylinder assembly via a first connecting part and to the second cylinder via a second connecting part. The connecting seat has a first channel and a second channel. A first solenoid valve is installed in the first channel, and a second solenoid valve is installed in the second channel. A floating piston is installed in the second cylinder, dividing it into a liquid reservoir and a gas reservoir. The liquid reservoir is connected to the central cylinder via the first channel and to the oil circuit via the second channel. In this embodiment, the first solenoid valve controls the first circuit containing the first channel, and the second solenoid valve controls the second circuit containing the second channel. This allows for bidirectional control of the oil inside the shock absorber through two circuits, improving the shock absorber's response speed. Both the first and second solenoid valves can achieve multi-stage or stepless adjustment of the oil flow, increasing the damping adjustment range of the shock absorber. This facilitates timely adjustment of the vehicle's damping force according to road conditions or driving conditions, improving vehicle comfort and safety. Attached Figure Description

[0014] Figure 1 An exploded view of the structure of a vibration damper provided for an embodiment of the invention;

[0015] Figure 2 A compression principle diagram of a vibration damper provided in an embodiment of the present invention;

[0016] Figure 3 A springback principle diagram of another vibration damper provided in an embodiment of the present invention;

[0017] Figure 4 This is a schematic diagram of the connecting seat of the vibration damper provided in an embodiment of the present invention;

[0018] Figure 5 This is a schematic cross-sectional view of another vibration damper provided in an embodiment of the present invention;

[0019] Figure 6 This is a schematic diagram of the control panel of a vibration damper provided in an embodiment of the present invention;

[0020] Figure 7This is a schematic diagram of a vibration damper control method provided in an embodiment of the present invention. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0022] Figure 1 An exploded view of the structure of a vibration damper provided as an embodiment of the invention. Figure 2 This is a compression principle diagram of a vibration damper provided in an embodiment of the present invention. Figure 3 This is a springback principle diagram of another vibration damper provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the connecting seat of the vibration damper provided in an embodiment of the present invention. The present invention provides a vibration damper, such as... Figures 1 to 4 As shown, it includes: a first cylinder block assembly, a connecting seat 5, and a second cylinder block 1 connected in sequence;

[0023] The first cylinder assembly includes an oil reservoir 6 and an intermediate cylinder 7 disposed inside the oil reservoir 6; both the oil reservoir 6 and the intermediate cylinder 7 are assembled to the first connecting part 51 of the connecting seat 5; a flow hole 71 is provided at the end of the intermediate cylinder 7 away from the first connecting part 51; an oil passage 61 is formed between the intermediate cylinder 7 and the oil reservoir 6.

[0024] The connecting seat 5 is provided with a first solenoid valve 41, a second solenoid valve 42, a first channel 53 and a second channel 54; the first solenoid valve 41 is assembled in the first channel 53; the second solenoid valve 42 is assembled in the second channel 54.

[0025] The second cylinder 1 is assembled to the second connecting part 52 of the connecting seat 5; a floating piston 3 is provided inside the second cylinder 1; the floating piston 3 divides the second cylinder 1 into a liquid storage chamber 31 and a gas storage chamber 32; the gas storage chamber 32 is located on the side of the liquid storage chamber 31 away from the second connecting part 52; the liquid storage chamber 31 is connected to the intermediate cylinder 7 through the first channel 53; the liquid storage chamber 31 is connected to the oil passage 61 through the second channel 54.

[0026] like Figure 1As shown, the first cylinder assembly, connecting seat 5, and second cylinder 1 are arranged sequentially. The first cylinder assembly serves as the working cylinder and includes an oil reservoir 6 and an intermediate cylinder 7. The intermediate cylinder 7 is located inside the oil reservoir 6, and the oil reservoir 6 and the intermediate cylinder 7 can be coaxially arranged, thus forming an oil passage 61 between the intermediate cylinder 7 and the oil reservoir 6. The connecting seat 5 is used to connect to the first cylinder assembly and the second cylinder 1 respectively. Specifically, the connecting seat 5 includes a first connecting part 51 and a second connecting part 52. The connecting seat 5 is connected to the first cylinder assembly through the first connecting part 51, and the connecting seat 5 is connected to the second cylinder 1 through the second connecting part 52. Optionally, the second connecting part 52 can be connected to the second cylinder 1 through a threaded locking ring 2 to fix the second cylinder 1 and prevent the second cylinder 1 from loosening.

[0027] The connecting seat 5 is provided with a first channel 53 and a second channel 54. A first solenoid valve 41 is installed in the first channel 53, and a second solenoid valve 42 is installed in the second channel 54. A floating piston 3 is provided in the second cylinder 1, which divides the second cylinder 1 into a liquid storage chamber 31 and a gas storage chamber 32. The liquid storage chamber 31 is filled with oil, and the gas storage chamber 32 can be filled with nitrogen. The liquid storage chamber 31 is connected to the intermediate cylinder 7 through the first channel 53, and the liquid storage chamber 31 is connected to the oil passage 61 through the second channel 54. Thus, oil can flow from the intermediate cylinder 7 through the first channel 53 into the liquid storage chamber 31, forming a first loop. Oil can also flow from the oil passage 61 through the second channel 54 into the liquid storage chamber 31, forming a second loop. The first solenoid valve 41 and the second solenoid valve 42 can regulate the flow rate of their respective circuits. By controlling the flow rate of the first and second circuits, the outflow and return rates of the oil are controlled, thereby increasing the damping adjustment of the shock absorber. At the same flow rate, the greater the internal flow through the first solenoid valve 41 and the second solenoid valve 42, the softer the shock absorber, and the vehicle leans towards comfort. Conversely, the shock absorber becomes stiffer, and the vehicle leans towards overshoot. Therefore, this dual-circuit electronically controlled shock absorber needs to be adapted to the vehicle's control circuit. By controlling the first solenoid valve 41 and the second solenoid valve 42, the shock absorber is adaptively adjusted, enabling stepless control of the shock absorber in both circuits, improving the shock absorber's response speed and increasing its controllable range.

[0028] In this embodiment of the invention, the shock absorber includes a first cylinder assembly, a connecting seat, and a second cylinder arranged sequentially. The first cylinder assembly includes a coaxially arranged central cylinder and an oil reservoir, forming an oil circuit between the central cylinder and the oil reservoir. The connecting seat is connected to the first cylinder assembly via a first connecting part and to the second cylinder via a second connecting part. The connecting seat has a first channel and a second channel. The first channel is equipped with a first solenoid valve, and the second channel is equipped with a second solenoid valve. A floating piston is provided in the second cylinder, dividing the second cylinder into a liquid reservoir and a gas reservoir. The liquid reservoir is connected to the central cylinder via the first channel and to the oil circuit via the second channel. In this embodiment, the first solenoid valve controls the first circuit containing the first channel, and the second solenoid valve controls the second circuit containing the second channel. This allows for bidirectional control of the oil inside the shock absorber through two circuits, improving the shock absorber's response speed. Both the first and second solenoid valves can achieve multi-stage or stepless adjustment of the oil flow, increasing the damping adjustment range of the shock absorber. This facilitates timely adjustment of the vehicle's damping force according to road conditions or driving conditions, improving vehicle comfort and safety.

[0029] The above is the core idea of ​​this invention. The technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0030] Optionally, the first solenoid valve 41 can be a compression regulating valve to control the flow rate of oil from the intermediate cylinder 7 into the reservoir 31; the second solenoid valve 42 can be a rebound regulating valve to control the flow rate of oil from the oil passage 61 into the reservoir 31.

[0031] Continue to refer to Figure 4 Optionally, the connecting seat 5 may include a first receiving cavity 55 and a second receiving cavity 56; the first receiving cavity 55 is used to assemble a first solenoid valve 41; the first solenoid valve 41 is detachably connected to the connecting seat 5; the second receiving cavity 56 is used to assemble a second solenoid valve 42; the second solenoid valve 42 is detachably connected to the connecting seat 5. The first receiving cavity 55 can accommodate the first solenoid valve 41, and the second receiving cavity 56 can accommodate the second solenoid valve 42. Both the first solenoid valve 41 and the second solenoid valve 42 are detachably connected to the connecting seat 5, which facilitates the subsequent replacement of the first solenoid valve 41 and the second solenoid valve 42 if they fail, improves the versatility of the first solenoid valve 41 and the second solenoid valve 42, and extends the service life of the shock absorber.

[0032] To facilitate accurate installation of the first solenoid valve 41 and the second solenoid valve 42, optionally, a first mark can be provided on the surface of the first solenoid valve 41; and a second mark can be provided on the surface of the second solenoid valve 42. The installer can then install the first solenoid valve 41 into the first receiving cavity 55 according to the first mark, and the second solenoid valve 42 into the second receiving cavity 56 according to the second mark. Furthermore, to distinguish between the first solenoid valve 41 and the second solenoid valve 42, optionally, the surface of the first solenoid valve 41 can be a first color; and the surface of the second solenoid valve 42 can be a second color; the first color and the second color are different colors. For example, the first color can be blue, and the second color can be red. This embodiment does not limit the specific colors used; any colors with a significant difference can be chosen for easy identification by the operator.

[0033] Figure 5 This is a cross-sectional structural diagram of another vibration damper provided in an embodiment of the present invention. Optionally, the vibration damper may further include: a piston assembly and a spring 64; the piston assembly includes a piston valve system 62 and a piston rod 63; the piston rod 63 is fixedly connected to the piston valve system 62; the piston valve system 62 is slidably connected to the inner wall of the intermediate cylinder 7; the piston rod 63 is used to drive the piston valve system 62 to slide along the inner wall of the intermediate cylinder 7; the piston rod 63 is provided with a first limiting structure 65; the first cylinder assembly is provided with a second limiting structure 66; the spring 64 is disposed between the first limiting structure 65 and the second limiting structure 66. When the piston rod 63 moves along the extension direction of the intermediate cylinder 7 towards the second limiting structure 66, oil flows from the oil passage 61 through the flow hole 71 to the intermediate cylinder 7. The oil flows along the first circuit, and the spring 64 is compressed, realizing the compression process of the shock absorber. When the piston rod 63 moves along the extension direction of the intermediate cylinder 7 towards the first limiting structure 65, oil flows from the intermediate cylinder 7 through the flow hole 71 to the oil passage 61. The oil flows along the second circuit, and the spring 64 is stretched, realizing the rebound process of the shock absorber. The vehicle shock absorber uses a second solenoid valve 42 to control the recovery damping force and a first solenoid valve 41 to control the compression damping force, expanding the variable range of the compression damping force and providing satisfactory handling, comfort, and safety for the vehicle under different road conditions.

[0034] Optionally, the shock absorber may also include: a control module ( Figure 1 (not shown in the image). The control module is electrically connected to the first solenoid valve 41 and the second solenoid valve 42 respectively, and is used to control the opening and closing of the first solenoid valve 41 and the second solenoid valve 42.

[0035] Figure 6This is a schematic diagram of the control panel of a vibration damper provided in an embodiment of the present invention. Optionally, the vibration damper may further include: a control panel 21; the control panel 21 includes a rebound adjustment control 22, a rebound reset control 23, a compression adjustment control 24, and a compression reset control 25; the control module is electrically connected to an external power supply and is used to convert the external current of the external power supply into a working current and input it to the first solenoid valve 41 and the second solenoid valve 42; the rebound adjustment control 22 is used to receive a rebound adjustment command and send it to the control module so that the control module controls the working current of the second solenoid valve 42; the compression adjustment control is used to receive a compression adjustment command and send it to the control module so that the control module controls the working current of the first solenoid valve 41; the rebound reset control 23 is used to receive a rebound reset command and send it to the control module so that the control module controls the second solenoid valve 42 to restore its factory working current; the compression reset control 25 is used to receive a compression reset command and send it to the control module so that the control module controls the first solenoid valve 41 to restore its factory working current.

[0036] This invention also provides a vibration damper control method applicable to vibration dampers provided in any embodiment of this invention. The vibration damper includes a control panel and a control module; the control panel includes at least a rebound adjustment control and a compression adjustment control. Figure 7 This is a schematic diagram of a vibration damper control method provided in an embodiment of the present invention, as shown below. Figure 7 As shown, the vibration damper control method provided in this embodiment of the invention includes the following steps:

[0037] Step S101: Based on the road conditions, input a compression adjustment command to the compression adjustment control to adjust the working current of the first solenoid valve, and input a rebound adjustment command to the rebound adjustment control to adjust the working current of the second solenoid valve; the road conditions include at least highway mode, expressway mode and mountain road mode.

[0038] It should be noted that the operating currents of the first and second solenoid valves can be adjusted at the same amplitude or independently; this embodiment does not impose any specific limitations on this. The driver can adjust the operating currents according to road conditions, thereby adjusting the opening degree of the first and second solenoid valves to achieve different damping forces in the shock absorber. Specifically, low damping force is achieved in highway mode to meet comfort requirements, while high damping force is achieved in high-speed and mountain road modes to meet safety requirements.

[0039] In this embodiment of the invention, the shock absorber includes a first cylinder assembly, a connecting seat, and a second cylinder arranged sequentially. The first cylinder assembly includes a coaxially arranged central cylinder and an oil reservoir, forming an oil circuit between the central cylinder and the oil reservoir. The connecting seat is connected to the first cylinder assembly via a first connecting part and to the second cylinder via a second connecting part. The connecting seat has a first channel and a second channel. The first channel is equipped with a first solenoid valve, and the second channel is equipped with a second solenoid valve. A floating piston is provided in the second cylinder, dividing the second cylinder into a liquid reservoir and a gas reservoir. The liquid reservoir is connected to the central cylinder via the first channel and to the oil circuit via the second channel. In this embodiment, the first solenoid valve controls the second circuit containing the first channel, and the second solenoid valve controls the first circuit containing the second channel. This allows for bidirectional control of the oil inside the shock absorber through two circuits, improving the shock absorber's response speed. Both the first and second solenoid valves can achieve multi-stage or stepless adjustment of the oil flow, increasing the damping adjustment range of the shock absorber. This facilitates timely adjustment of the vehicle's damping force according to road conditions or driving conditions, improving vehicle comfort and safety.

[0040] Based on the above embodiments, the opening degrees of the first and second solenoid valves can be adjusted simultaneously and by the same magnitude. A higher operating current from the solenoid valve results in a larger valve opening, leading to higher damping force for the vehicle. Optionally, the shock absorber control method may specifically include: adjusting the operating current of the first and second solenoid valves to a first current if the road condition is highway mode; adjusting the operating current of the first and second solenoid valves to a second current if the road condition is high-speed mode; and adjusting the operating current of the first and second solenoid valves to a third current if the road condition is mountain road mode; wherein the second current is greater than the first current; and the third current is greater than the second current. This embodiment allows for setting a higher damping force as the current value increases. This embodiment adjusts to a higher damping force on bumpy road conditions and a lower damping force on relatively flat road conditions, effectively balancing vehicle comfort and safety.

[0041] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A vibration damper, characterized in that, include: The first cylinder block assembly, the connecting seat, and the second cylinder block are connected sequentially. The first cylinder assembly includes an oil reservoir and an intermediate cylinder disposed inside the oil reservoir; both the oil reservoir and the intermediate cylinder are assembled to the first connecting portion of the connecting seat; a flow hole is provided at the end of the intermediate cylinder away from the first connecting portion; an oil passage is formed between the intermediate cylinder and the oil reservoir; The connecting seat is provided with a first solenoid valve, a second solenoid valve, a first channel, and a second channel; the first solenoid valve is assembled in the first channel; the second solenoid valve is assembled in the second channel; The second cylinder is assembled to the second connecting part of the connecting seat; a floating piston is provided in the second cylinder; the floating piston divides the second cylinder into a liquid storage chamber and a gas storage chamber; the gas storage chamber is located on the side of the liquid storage chamber away from the second connecting part; the liquid storage chamber is connected to the intermediate cylinder through the first channel; the liquid storage chamber is connected to the oil circuit through the second channel.

2. The vibration damper according to claim 1, characterized in that, The first solenoid valve is a compression regulating valve, used to control the flow rate of oil from the intermediate cylinder into the reservoir; the second solenoid valve is a rebound regulating valve, used to control the flow rate of oil from the oil passage into the reservoir.

3. The vibration damper according to claim 1, characterized in that, The connecting seat includes a first receiving cavity and a second receiving cavity; The first receiving cavity is used to assemble the first solenoid valve; the first solenoid valve is detachably connected to the connecting seat; The second receiving cavity is used to assemble the second solenoid valve; the second solenoid valve is detachably connected to the connecting seat.

4. The vibration damper according to claim 3, characterized in that, The surface of the first solenoid valve is provided with a first mark; the surface of the second solenoid valve is provided with a second mark.

5. The vibration damper according to claim 3, characterized in that, The surface of the first solenoid valve is a first color; the surface of the second solenoid valve is a second color; the first color and the second color are different colors.

6. The vibration damper according to claim 1, characterized in that, Also includes: Piston assembly and spring; the piston assembly includes a piston valve system and a piston rod; The piston rod is fixedly connected to the piston valve system; the piston valve system is slidably connected to the inner wall of the intermediate cylinder; the piston rod is used to drive the piston valve system to slide along the inner wall of the intermediate cylinder. The piston rod is provided with a first limiting structure; the first cylinder assembly is provided with a second limiting structure; and the spring is disposed between the first limiting structure and the second limiting structure.

7. The vibration damper according to claim 1, characterized in that, Also includes: Control module; The control module is electrically connected to the first solenoid valve and the second solenoid valve respectively, and is used to control the opening and closing of the first solenoid valve and the second solenoid valve.

8. The vibration damper according to claim 7, characterized in that, Also includes: Control panel; the control panel includes a springback adjustment control, a springback reset control, a compression adjustment control, and a compression reset control; the control module is electrically connected to an external power supply and is used to convert the external current of the external power supply into a working current and input it to the first solenoid valve and the second solenoid valve; The springback adjustment control is used to receive springback adjustment commands and send them to the control module, so that the control module controls the operating current of the second solenoid valve; the compression adjustment control is used to receive compression adjustment commands and send them to the control module, so that the control module controls the operating current of the first solenoid valve. The springback reset control is used to receive a springback reset command and send it to the control module, so that the control module controls the second solenoid valve to restore the factory operating current; the compression reset control is used to receive a compression reset command and send it to the control module, so that the control module controls the first solenoid valve to restore the factory operating current.

9. A vibration damper control method, characterized in that, The vibration damper is applicable to any one of claims 1-8, the vibration damper comprising a control panel and a control module; the control panel comprising at least a rebound adjustment control and a compression adjustment control; The vibration damper control method includes: Based on road conditions, a compression adjustment command is input to the compression adjustment control to adjust the operating current of the first solenoid valve, and a rebound adjustment command is input to the rebound adjustment control to adjust the operating current of the second solenoid valve; the road conditions include at least highway mode, expressway mode, and mountain road mode.

10. The vibration damper control method according to claim 9, characterized in that, Specifically include: If the road condition is highway mode, then the operating current of the first solenoid valve and the second solenoid valve is adjusted to the first current; If the road condition is in high-speed mode, then adjust the operating current of the first solenoid valve and the second solenoid valve to the second current; If the road condition is mountain road mode, then the operating current of the first solenoid valve and the second solenoid valve is adjusted to a third current; the second current is greater than the first current; the third current is greater than the second current.

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