CN217926903U - Adjustable suspension system and vehicle - Google Patents

Abstract

The utility model provides an adjustable suspension system and vehicle. The utility model discloses an adjustable suspension system includes the shock absorber, and the bottom of shock absorber is equipped with the first oil inlet and outlet and the second oil inlet and outlet of intercommunication respectively recovering chamber and compression chamber. The adjustable suspension system further comprises an adjusting unit arranged between the first oil inlet/outlet and the second oil inlet/outlet, wherein a pressure regulating valve used for limiting the pressure range of the communicated oil between the first oil inlet/outlet and the second oil inlet/outlet and a flow regulating valve used for regulating the flow of the communicated oil are arranged in the adjusting unit. When the shock absorber plays a role in damping, the oil in the recovery cavity and the oil in the compression cavity can circulate through the pressure release valve on the piston and can also circulate through the adjusting unit, so that the piston rod plays a role in damping; the damping, hardness or vibration reduction frequency of the vibration absorber can be changed by adjusting the adjusting unit to limit the pressure of the conducting oil and change the flow.

Description

Adjustable suspension system and vehicle

Technical Field

The utility model relates to a vehicle suspension technical field, in particular to adjustable suspension system. Additionally, the utility model discloses still relate to a vehicle.

Background

The suspension, in addition to providing a basic vertical support for the vehicle body, has its primary function of dampening and absorbing vibrations transmitted from the road surface to the vehicle body. Meanwhile, according to design expectation, the motion postures of the vehicle body under different driving conditions need to be controlled so as to improve the comfort and the controllability of the vehicle; however, in general, the handling and comfort of the vehicle are mutually restricted, and the conventional suspension technology cannot improve the comfort of the vehicle and simultaneously achieve good controllability.

In short, conventional suspension technology must sacrifice part of the maneuverability to achieve superior comfort. With the continuous excavation of the performance of the whole vehicle, in order to achieve the balance of the comfort and the controllability of the vehicle at a higher level, it is known in the industry to fully exert the potential performance of the suspension by electrically controlling and adjusting the acting force of the elastic or damping element of the suspension in real time.

A more common approach is to employ a semi-active suspension system, such as a damped continuously variable shock absorber system. According to the scheme, the damping of the shock absorber can be adjusted in real time according to the signal condition of an external sensor in the running process of a vehicle, but the adjustable force adjusting range of the damping continuous adjustable shock absorber system is limited by the motion state of the shock absorber. For example, when the running speed of the shock absorber is zero, the shock absorber can only generate zero damping force; when the shock absorber is compressed, only the damping force in the compression direction can be generated; when the shock absorber is restored, only the damping force in the restoration direction can be generated. This limitation limits the potential of semi-active suspension systems for vehicle performance improvement.

The other mode is that real-time adjustable main power is directly applied to the suspension through a controllable external force source, and a known scheme is that a linear motor acts between a vehicle body and a spring lower part of a shock absorber, and the real-time adjustment of the main power of the suspension is realized by controlling the acting force and the direction of the linear motor. However, the scheme has the disadvantages that the main power output by the linear motor cannot be rapidly amplified, so that the main power provided by the system is very limited on the premise of limited size and weight of the actuator, and the finally embodied overall performance improvement effect is small.

In addition, a scheme that a motor is used for applying active force between the suspension and the vehicle body through a torsion bar and a suspension rod after being decelerated is adopted. The scheme is a pure electromechanical system, and the inherent disadvantage of a mechanical system is low energy density, for example, when the mass of a whole vehicle is increased, a larger main power is often required to ensure the control effect of the system, and with the increase of the main power demand, the design volume and weight of a mechanical speed reducing mechanism of the system are increased, and finally, the problem that the mechanical transmission system capable of achieving the target main power output cannot be arranged and implemented in the limited structural space of a suspension is caused.

Based on the above-mentioned problem and not enough that various vehicle suspensions of current set up the form and exist, urgent need develop a vehicle suspension technical scheme who gives consideration to vehicle travelling comfort and controllability and the technique of being convenient for realizes.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an adjustable suspension system to a damping performance adjustable vehicle suspension technical scheme is provided.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

an adjustable suspension system includes a shock absorber having a cylinder chamber divided by a piston into a rebound chamber and a compression chamber; a first oil inlet and outlet and a second oil inlet and outlet which are respectively communicated with the restoration cavity and the compression cavity are formed in the bottom of the shock absorber; the adjustable suspension system further comprises an adjusting unit arranged between the first oil inlet and outlet and the second oil inlet and outlet, wherein a pressure regulating valve used for limiting the pressure range of the oil conducted between the first oil inlet and outlet and the second oil inlet and outlet and a flow regulating valve used for regulating the flow of the conducted oil are arranged in the adjusting unit.

Furthermore, a middle chamber is arranged in the shock absorber and is used for communicating the restoration chamber and the first oil inlet and outlet.

Further, the flow regulating valve is an electric regulating valve.

Furthermore, a first control valve group and a second control valve group are arranged in the adjusting unit in series; the first control valve group and the second control valve group can be respectively provided with a first lower limit pressure threshold and a second lower limit pressure threshold; the oil flowing from the first oil inlet and outlet to the second oil inlet and outlet passes through the first control valve group only when the pressure is higher than the first lower limit pressure threshold value; and the oil liquid flowing from the second oil inlet and outlet to the first oil inlet and outlet only passes through the second control valve group when the pressure is higher than the second lower limit pressure threshold value.

Further, the pressure regulating valve comprises a first pressure regulating valve arranged in the first control valve group and a second pressure regulating valve arranged in the second control valve group; the first control valve group is connected with a first check valve in parallel, the first pressure regulating valve is used for setting the first lower limit pressure threshold, and the first check valve is communicated in a one-way mode in the flow direction from the second oil inlet/outlet to the first oil inlet/outlet; the second control valve group is connected in parallel with a second one-way valve, the second pressure regulating valve is used for setting the second lower limit pressure threshold, and the second one-way valve is in one-way conduction in the flow direction from the first oil inlet/outlet to the second oil inlet/outlet.

Furthermore, the flow regulating valve comprises a first flow regulating valve arranged in the first control valve group and a second flow regulating valve arranged in the second control valve group; the first flow regulating valve is connected with the first pressure regulating valve in series, and the second flow regulating valve is connected with the second pressure regulating valve in series.

Further, the pressure regulating valve also comprises a third pressure regulating valve arranged in the first control valve group in parallel and a fourth pressure regulating valve arranged in the second control valve group in parallel; the third pressure regulating valve is used for setting a first upper limit pressure threshold value, and is only conducted when the pressure of the oil flowing out of the first oil inlet/outlet is higher than the first upper limit pressure threshold value; the fourth pressure regulating valve is used for setting a second upper limit pressure threshold value, and the fourth pressure regulating valve is conducted only when the pressure of the oil flowing out of the second oil inlet/outlet is higher than the second upper limit pressure threshold value.

Furthermore, a bidirectional electric liquid pump is arranged on an oil path between the first control valve group and the second control valve group.

Furthermore, a first energy accumulator is arranged on an oil path between the two-way electric liquid pump and the first control valve group, and/or a second energy accumulator is arranged on an oil path between the two-way electric liquid pump and the second control valve group.

Compared with the prior art, the utility model discloses following advantage has:

the utility model discloses an adjustable suspension system, set up the first oil inlet and outlet and the second oil inlet and outlet on the shock absorber, and set up the regulating unit between the first oil inlet and outlet and the second oil inlet and outlet; when the shock absorber plays a role in damping, oil in the recovery cavity and the compression cavity can circulate through the pressure relief valve on the piston and can also circulate through the adjusting unit, so that the piston rod plays a role in damping; the damping, hardness or vibration reduction frequency of the vibration absorber can be changed by adjusting the adjusting unit to limit the pressure of the conducting oil or change the flow, so that the technical scheme of the vehicle suspension with adjustable vibration reduction performance is provided.

In addition, through set up first valve unit and second valve unit in the regulating unit, set up two lower limit pressure threshold respectively by two valves, when the pressure that only switches on fluid was on lower limit pressure threshold, the corresponding fluid that flows to just can switch on to make regulating unit exert circulation damping and regulatory action. Through the adjustment setting first valve unit and the second valve unit's different pressure threshold, can change the participation condition of adjusting unit to change the hardness of shock absorber, help increasing the regulation performance of suspension.

And the opening degree of the valve port of the flow regulating valve is controlled to regulate the conduction flow of the flow regulating valve, so that the regulating effects of the damping and the vibration damping performance of the vibration damper can be effectively improved.

Another object of the present invention is to provide a vehicle, wherein the adjustable suspension system is disposed in the vehicle. Compared with the prior art, the utility model discloses a vehicle has the technical advantage that above-mentioned adjustable suspension system possessed.

Drawings

Fig. 1 is a schematic diagram illustrating an oil path control of an adjustable suspension system according to a first embodiment of the present invention;

fig. 2 is a schematic diagram illustrating an oil path control of an adjustable suspension system according to a first embodiment of the present invention;

fig. 3 is a schematic diagram illustrating an oil path control of an adjustable suspension system according to a second embodiment of the present invention;

fig. 4 is a schematic diagram illustrating oil path control of the adjustable suspension system according to the third embodiment of the present invention;

fig. 5 is a schematic view illustrating an oil path control in the valve group assembly integrated with a part of the oil path component in the adjustable suspension system according to the third embodiment of the present invention;

fig. 6 is a schematic diagram of oil path control in which each oil path component is integrated into a valve group assembly in the adjustable suspension system according to the third embodiment of the present invention.

Description of reference numerals:

1. a shock absorber; 2. a piston rod; 3. a piston; 4. a lower support rod; 5. an upper support bushing; 6. a lower support rod lifting lug; 7. a rehabilitation chamber; 8. a compression chamber; 9. an outer cylinder body;

11. an intermediate cylinder; 12. restoring the directional pressure relief valve; 13. compressing the pressure release valve; 14. a communicating hole; 15. an intermediate chamber;

20. a first control valve group; 20a and a third oil inlet and outlet; 20b, a fourth oil inlet and outlet; 21. a first flow regulating valve; 22. a first pressure regulating valve; 23. a third pressure regulating valve; 24. a first check valve; 25. a first oil inlet and outlet; 26. a first communicating oil passage; 27. a second communicating oil passage; 28. a first accumulator;

231. a third flow rate regulating valve; 238. an accumulator;

30. a second control valve group; 30a and a fifth oil inlet and outlet; 30b and a sixth oil inlet and outlet; 31. a second flow regulating valve; 32. a second pressure regulating valve; 33. a fourth pressure regulating valve; 34. a second one-way valve; 35. a second oil inlet and outlet; 36. a third communicating oil path; 37. a fourth communication oil passage; 38. a second accumulator;

40. a bidirectional electric liquid pump; 40a and a seventh oil inlet and outlet; 40b, an eighth oil inlet and outlet; 41. a hydraulic pump body; 42. a motor;

50. a pump fluid and energy storage assembly; 60. and adjusting the unit assembly.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

In the description of the present invention, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the appearances of the terms "first," "second," and the like, if any, are also intended to be descriptive only and not for purposes of indicating or implying relative importance.

Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless expressly limited otherwise. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The embodiment relates to an adjustable suspension system, and provides a technical scheme of a vehicle suspension with adjustable damping performance; one exemplary oil control principle of the adjustable suspension system is shown in fig. 1.

In general, the adjustable suspension system includes a shock absorber 1, a cylinder chamber in the shock absorber 1 being partitioned into a rebound chamber 7 and a compression chamber 8 by a piston 3; meanwhile, the bottom of the shock absorber 1 is provided with a first oil inlet/outlet 25 and a second oil inlet/outlet 35 which are respectively communicated with the restoration chamber 7 and the compression chamber 8. In addition, the adjustable suspension system further comprises an adjusting unit arranged between the first oil inlet/outlet 25 and the second oil inlet/outlet 35, wherein the adjusting unit is provided with a pressure regulating valve used for limiting the pressure range of the conducting oil between the first oil inlet/outlet 25 and the second oil inlet/outlet 35, and a flow regulating valve used for adjusting the flow of the conducting oil.

To facilitate understanding of the scheme, the general structure of the shock absorber 1 will be explained first. Particularly, shock absorber 1 includes cylinder body and piston rod 2 and piston 3, and the bottom of cylinder body is equipped with lower support rod 4, and the bottom of lower support rod 4 is equipped with lower support rod lug 6, the top of piston rod 2 is equipped with support bush 5, goes up support bush 5 and lower support rod lug 6 and is used for connecting knuckle and frame respectively. In addition, a damper spring (not shown) is fitted around the outside of the cylinder to provide resilient support between the knuckle and the frame. The piston rod 2 is vertically slid in the cylinder chamber by the piston 3, the restoring chamber 7 is located on the side of the piston 3 facing the piston rod 2, the compression chamber 8 is located on the side of the piston 3 facing away from the piston rod 2, when the shock absorber 1 performs a damping action, the piston 3 is vertically slid to perform a compression stroke and a restoring stroke, and the oil in the cylinder chamber flows between the restoring chamber 7 and the compression chamber 8 through the restoring direction relief valve 12 and the compression direction relief valve 13 provided on the piston 3.

In the present embodiment, the cylinder of the shock absorber 1 includes an outer cylinder 9 and an intermediate cylinder 11, a cylinder chamber is formed inside the intermediate cylinder 11, and an intermediate chamber 15 is provided in the shock absorber 1 between the intermediate cylinder 11 and the outer cylinder 9; the first oil inlet/outlet 25 and the second oil inlet/outlet 35 of the shock absorber 1 are both disposed at the bottom of the shock absorber 1, wherein the restoring chamber 7 and the intermediate chamber 15 are communicated through the communication hole 14, so that the restoring chamber 7 and the first oil inlet/outlet 25 are communicated through the intermediate chamber 15. Through setting up middle chamber 15, can lead the fluid in the chamber 7 that recovers to the first oil inlet and outlet 25 department that is located the shock absorber 1 bottom, first oil inlet and outlet 25 just can be established at the bottom of shock absorber 1 with second oil inlet and outlet 35 adjacently, and no longer occupy the upper middle portion region on the shock absorber 1 outer wall to spring-supported parts such as damping spring provide good installation space for setting up the upper middle portion on shock absorber 1 outer wall.

Since the amount of conductance of the rebound to the relief valve 12 and the compression to the relief valve 13 is fixed, in order to achieve the adjustability of the damping performance of the shock absorber 1, in the adjustable suspension system of the present embodiment, an adjusting unit is provided between the first oil inlet/outlet port 25 and the second oil inlet/outlet port 35. As shown in fig. 1, a first control valve group 20 and a second control valve group 30 are serially arranged on an oil path conducted between the first oil inlet/outlet port 25 and the second oil inlet/outlet port 35 in the adjusting unit, and a flow adjusting valve, specifically, a third flow adjusting valve 231 is arranged between the first control valve group 20 and the second control valve group 30. The first oil inlet/outlet 25 is communicated with the first control valve group 20 through a first communication oil path 26, and the second oil inlet/outlet 35 is communicated with the second control valve group 30 through a third communication oil path 36; a third flow rate adjustment valve 231 is provided on the oil path between first control valve group 20 and second control valve group 30.

The first and second control valve groups 20 and 30 are used to set a first and second lower pressure threshold, respectively. The oil flowing from the first oil inlet/outlet 25 to the second oil inlet/outlet 35 passes through the first control valve group 20 only when the pressure is higher than the first lower limit pressure threshold; the oil flowing from the second port 35 to the first port 25 only passes through the second control valve set 30 when the pressure exceeds the second lower threshold pressure. Through set up first valve unit 20 and second valve unit 30 in the regulating unit, set up two lower limit pressure threshold values respectively by two valves, when the pressure that only switches on fluid was above lower limit pressure threshold value, the oil circuit between first business turn over hydraulic fluid port 25 and the second business turn over hydraulic fluid port 35 just can switch on to make the regulating unit exert good regulatory function. By adjusting the different pressure thresholds of the first control valve group 20 and the second control valve group 30, the participation condition of the adjusting unit can be changed, so that the hardness of the shock absorber 1 is changed, and the adjustment performance of the suspension is improved.

Specifically, the pressure regulating valves include a first pressure regulating valve 22 and a second pressure regulating valve 32. A first pressure regulating valve 22 and a first check valve 24 are arranged in the first control valve group 20 in parallel, the first pressure regulating valve 22 is used for setting a first lower limit pressure threshold, and the first check valve 24 is in one-way conduction in the flow direction from the second oil inlet/outlet 35 to the first oil inlet/outlet 25; meanwhile, a second pressure regulating valve 32 and a second check valve 34 are arranged in parallel in the second control valve group 30, the second pressure regulating valve 32 is used for setting a second lower limit pressure threshold, and the second check valve 34 is in one-way communication in the flow direction from the first oil inlet/outlet 25 to the second oil inlet/outlet 35. The combination of the pressure regulating valve and the one-way valve is utilized to realize the one-way pressure regulation of the oil liquid, and the pressure regulating valve has the advantages of mature and reliable technology, convenience in allocation and the like.

Furthermore, a first energy accumulator 28 may be provided in the oil path between third flow control valve 231 and first control valve block 20, and/or a second energy accumulator 38 may be provided in the oil path between third flow control valve 231 and second control valve block 30. The oil circuit is provided with an energy storage device, so that the stability of the vibration reduction process of the vibration absorber 1 can be improved.

Based on the above arrangement, the opening of the valve port of the third flow regulating valve 231 is controlled to regulate the flow rate, so as to achieve the effect of changing the damping, hardness and damping frequency of the shock absorber 1.

The electric control valve is preferably adopted in the flow control valve, so that the flow of the oil liquid between the first oil inlet/outlet 25 and the second oil inlet/outlet 35 can be adjusted and controlled conveniently, and the adjustment and the control are more convenient.

In the adjustable suspension system of the embodiment, the first oil inlet/outlet 25 and the second oil inlet/outlet 35 are arranged on the shock absorber 1, and the adjusting unit with the flow adjusting valve is arranged between the first oil inlet/outlet 25 and the second oil inlet/outlet 35, so that when the shock absorber 1 plays a damping role, oil in the recovery chamber 7 and the compression chamber 8 can flow through the pressure release valve on the piston 3, and the communication condition of the oil between the recovery chamber 7 and the compression chamber 8 can be adjusted through the flow adjusting valve; the opening degree of the valve port of the flow regulating valve is controlled, the flow of the flow regulating valve is regulated, and the damping and vibration damping performance of the vibration damper 1 can be changed, so that the technical scheme of the vehicle suspension with the adjustable vibration damping performance is provided.

As shown in fig. 2, the third flow rate adjustment valve 231 may be replaced with a bidirectional electric liquid pump 40. The bidirectional electrohydraulic pump 40 is arranged on the oil path between the first control valve group 20 and the second control valve group 30, so that the flow direction and the flow rate of the conducted oil between the first oil inlet/outlet 25 and the second oil inlet/outlet 35 can be actively controlled; by setting a reasonable algorithm to control the running direction and the running speed of the bidirectional electric liquid pump 40, the main power control of the adjustable suspension system can be realized.

In summary, in the adjustable suspension system of the present embodiment, the first oil inlet/outlet 25 and the second oil inlet/outlet 35 are disposed on the shock absorber 1, and the adjusting unit is disposed between the first oil inlet/outlet 25 and the second oil inlet/outlet 35; when the shock absorber 1 plays a damping role, oil in the recovery cavity 7 and the compression cavity 8 can be communicated through the pressure relief valve on the piston 3, and the communication condition of the oil between the recovery cavity 7 and the compression cavity 8 can be adjusted through the adjusting unit; the damping, hardness or vibration reduction frequency of the vibration absorber 1 can be changed by adjusting the adjusting unit to limit the pressure of the conducting oil or change the flow, so that the technical scheme of the vehicle suspension with adjustable vibration reduction performance is provided.

Example two

The present embodiments are also directed to an adjustable suspension system, an exemplary oil control principle of which is shown in fig. 3.

In the adjustable suspension system of the present embodiment, the adjusting unit is also provided with the first control valve group 20 and the second control valve group 30 in series, and the oil path between the first control valve group 20 and the second control valve group 30 is communicated with the accumulator 238, so as to achieve the purpose of improving the stability of the vibration damping process of the vibration damper 1.

As shown in fig. 3, the first communication oil path 26 is communicated between the first oil inlet/outlet port 25 and the third oil inlet/outlet port 20a of the first control valve group 20, the third communication oil path 36 is communicated between the second oil inlet/outlet port 35 and the fifth oil inlet/outlet port 30a of the second control valve group 30, the second communication oil path 27 is communicated between the fourth oil inlet/outlet port 20b of the first control valve group 20 and the accumulator 238, and the fourth communication oil path 37 is communicated between the sixth oil inlet/outlet port 30b of the second control valve group 30 and the accumulator 238.

The first and second control valve groups 20 and 30 in the present embodiment can be configured as generally described in the first embodiment, except that the pressure regulating valves further include a third pressure regulating valve 23 and a fourth pressure regulating valve 33. In addition to the parallel connection of the first pressure regulating valve 22 and the first check valve 24, the first control valve group 20 is provided with a third pressure regulating valve 23 in parallel. The third pressure regulating valve 23 is used for setting a first upper limit pressure threshold, and the oil flowing from the first oil inlet/outlet port 25 to the second oil inlet/outlet port 35 is directly communicated with the third pressure regulating valve 23 when the pressure is higher than the first upper limit pressure threshold, that is, the third pressure regulating valve 23 is only communicated when the pressure of the oil flowing from the first oil inlet/outlet port 25 is higher than the first upper limit pressure threshold. Similarly, in addition to the second pressure regulating valve 32 and the second check valve 34, the second control valve group 30 is provided with a fourth pressure regulating valve 33 in parallel, the fourth pressure regulating valve 33 is used for setting a second upper limit pressure threshold, the oil flowing from the second oil inlet/outlet port 35 to the first oil inlet/outlet port 25 passes through the fourth pressure regulating valve 33 directly when the pressure is higher than the second upper limit pressure threshold, that is, the fourth pressure regulating valve 33 is only turned on when the pressure of the oil flowing from the second oil inlet/outlet port 35 is higher than the second upper limit pressure threshold.

The third pressure regulating valve 23 and the fourth pressure regulating valve 33 are respectively arranged in parallel in the first control valve group 20 and the second control valve group 30, so that an upper limit pressure threshold value can be defined, when a vehicle is in severe jolt, when the pressure of the oil conducted between the first oil inlet/outlet 25 and the second oil inlet/outlet 35 exceeds the upper limit pressure threshold value, the oil can bypass the flow regulating valve to be directly conducted, the buffering and reaction speed of the shock absorber 1 is increased, and the shock absorption effect of the suspension in the face of extreme conditions is favorably improved.

Based on the above-described arrangement, the flow rate adjustment valve of the present embodiment includes the first flow rate adjustment valve 21 provided in the first control valve group 20, and the second flow rate adjustment valve 31 provided in the second control valve group 30. The first flow rate adjustment valve 21 is connected in series with the first pressure adjustment valve 22, and the second flow rate adjustment valve 31 is connected in series with the second pressure adjustment valve 32. The two flow regulating valves are respectively arranged in the first control valve group 20 and the second control valve group 30, so that the flow of the conducting oil of the shock absorber 1 in the compression stroke and the recovery stroke can be respectively regulated, and different shock absorption effects can be provided for the compression stroke and the recovery stroke.

The configuration of other parts of the adjustable suspension system of the present embodiment can be implemented by referring to the solution provided in the first embodiment, and will not be described herein again.

EXAMPLE III

The present embodiments are also directed to an adjustable suspension system, an exemplary oil control principle of which is shown in fig. 4, 5 and 6.

In the adjustable suspension system of the present embodiment, the adjusting unit is also provided with the first control valve group 20 and the second control valve group 30 in series, and the oil path between the first control valve group 20 and the second control valve group 30 is communicated with the bidirectional electric liquid pump 40; the bidirectional electrohydraulic pump 40 is arranged on the oil path between the first control valve group 20 and the second control valve group 30, so that the flow direction and the flow rate of the conducted oil between the first oil inlet/outlet 25 and the second oil inlet/outlet 35 can be actively controlled; by setting a reasonable algorithm to control the running direction and the running speed of the bidirectional electric liquid pump 40, the main power control of the adjustable suspension system can be realized.

As shown in fig. 4, the bidirectional electric liquid pump 40 includes a hydraulic pump body 41 and an electric motor 42 for driving the hydraulic pump body 41 to operate. The second communication oil path 27 is communicated between the fourth oil inlet/outlet port 20b of the first pilot valve group 20 and the seventh oil inlet/outlet port 40a of the hydraulic pump body 41, and the fourth communication oil path 37 is communicated between the sixth oil inlet/outlet port 30b of the second pilot valve group 30 and the eighth oil inlet/outlet port 40b of the hydraulic pump body 41.

Meanwhile, a first accumulator 28 is provided on a second communication oil path 27 between the bidirectional electric liquid pump 40 and the first control valve group 20, and a second accumulator 38 is provided on a fourth communication oil path 37 between the bidirectional electric liquid pump 40 and the second control valve group 30. The energy storage devices are arranged on oil paths between the two-way electric liquid pump 40 and the first control valve group 20 and between the two-way electric liquid pump 40 and the second control valve group 30, so that the stability of the vibration reduction process of the vibration absorber 1 can be improved.

The first and second control valve assemblies 20 and 30 and other parts of the adjustable suspension system according to this embodiment can be implemented by referring to the solutions provided in the first or second embodiments, and are not described herein again.

Further, based on the above-described configuration, as shown in fig. 5 and 6, two or more of the first control valve group 20, the second control valve group 30, the bidirectional electric liquid pump 40, the first accumulator 28, and the second accumulator 38 may be integrated in one valve group assembly. For example, the bi-directional electric liquid pump 40, the first accumulator 28, and the second accumulator 38 are integrated into a valve manifold assembly to form a pump fluid and accumulator assembly 50; or, the first control valve group 20, the second control valve group 30, the bidirectional electrohydraulic pump 40, the first accumulator 28 and the second accumulator 38 are all integrated into one valve group assembly to form the adjusting unit assembly 60; still alternatively, the first control valve block 20, the second control valve block 30, the first accumulator 28, and the second accumulator 38 are integrated into a single valve block assembly, forming a regulated accumulator assembly. The first control valve group 20, the second control valve group 30, the bidirectional electric liquid pump 40, the first energy accumulator 28, the second energy accumulator 38 and the like are designed into an integral structure, so that the compact design of an adjustable suspension system can be realized, and the arrangement and installation of the parts such as the bidirectional electric liquid pump 40 and an adjusting unit in the complex environment around the shock absorber 1 are facilitated.

The adjustable suspension system of this embodiment, two-way electric liquid pump 40 combine the energy storage ware to with the valve body combination of different grade type, can realize the initiative regulation of suspension, can make full use of the power of electric liquid pump in the high rotational speed district of low pressure, ensured low energy consumption, high response speed and good shock-absorbing capacity of suspension system, improve the travelling comfort of vehicle under different road conditions.

Example four

The present embodiment relates to a vehicle having an adjustable suspension system provided in the first, second, or third embodiment.

In the vehicle of the present embodiment, the first control valve group 20 and the second control valve group 30, and the bidirectional electrohydraulic pump 40 on the oil path therebetween are arranged in series in the adjusting unit of the adjustable suspension system; the softness and hardness of the suspension can be adjusted by the first control valve group 20 and the second control valve group 30. The bidirectional electrohydraulic pump 40 can actively control the flow direction and the flow rate of the conducted oil between the first oil inlet/outlet 25 and the second oil inlet/outlet 35; the driving force control of the active suspension can be realized by setting a reasonable algorithm to control the operation direction and the operation speed of the bidirectional electric liquid pump 40. The damping, hardness or vibration reduction frequency of the vibration absorber 1 can be changed by adjusting the adjusting unit to limit the pressure of the conducting oil and change the flow.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An adjustable suspension system comprising a shock absorber (1), a cylinder chamber within said shock absorber (1) being divided by a piston (3) into a rebound chamber (7) and a compression chamber (8); the method is characterized in that:

a first oil inlet and outlet (25) and a second oil inlet and outlet (35) which are respectively communicated with the restoration cavity (7) and the compression cavity (8) are arranged at the bottom of the shock absorber (1);

the adjustable suspension system further comprises an adjusting unit arranged between the first oil inlet and outlet (25) and the second oil inlet and outlet (35), wherein a pressure regulating valve used for limiting the pressure range of the conducted oil between the first oil inlet and outlet (25) and the second oil inlet and outlet (35) and a flow regulating valve used for regulating the flow of the conducted oil are arranged in the adjusting unit.

2. The adjustable suspension system of claim 1 wherein:

an intermediate chamber (15) is arranged in the shock absorber (1), and the intermediate chamber (15) is used for communicating the restoration cavity (7) with the first oil inlet/outlet (25).

3. The adjustable suspension system of claim 1, wherein:

the flow regulating valve is an electric regulating valve.

4. The adjustable suspension system of claim 1 wherein:

a first control valve group (20) and a second control valve group (30) are arranged in the adjusting unit in series;

the first control valve group (20) and the second control valve group (30) can be respectively provided with a first lower limit pressure threshold value and a second lower limit pressure threshold value;

the oil flowing from the first oil inlet and outlet (25) to the second oil inlet and outlet (35) passes through the first control valve group (20) only when the pressure is higher than the first lower limit pressure threshold;

the oil flowing from the second oil inlet/outlet (35) to the first oil inlet/outlet (25) passes through the second control valve group (30) only when the pressure is higher than the second lower limit pressure threshold.

5. The adjustable suspension system of claim 4, wherein:

the pressure regulating valve comprises a first pressure regulating valve (22) arranged in the first control valve group (20) and a second pressure regulating valve (32) arranged in the second control valve group (30);

a first check valve (24) is connected in parallel in the first control valve group (20), the first pressure regulating valve (22) is used for setting the first lower limit pressure threshold, and the first check valve (24) is in one-way conduction in the flow direction from the second oil inlet/outlet (35) to the first oil inlet/outlet (25);

the second control valve group (30) is connected in parallel with a second check valve (34), the second pressure regulating valve (32) is used for setting the second lower limit pressure threshold, and the second check valve (34) is communicated in a one-way mode in the flowing direction from the first oil inlet/outlet (25) to the second oil inlet/outlet (35).

6. The adjustable suspension system of claim 5 wherein:

the flow regulating valves comprise a first flow regulating valve (21) arranged in the first control valve group (20) and a second flow regulating valve (31) arranged in the second control valve group (30);

the first flow regulating valve (21) is connected in series with the first pressure regulating valve (22), and the second flow regulating valve (31) is connected in series with the second pressure regulating valve (32).

7. The adjustable suspension system of claim 6 wherein:

the pressure regulating valves further comprise a third pressure regulating valve (23) arranged in parallel in the first control valve group (20), and a fourth pressure regulating valve (33) arranged in parallel in the second control valve group (30);

the third pressure regulating valve (23) is used for setting a first upper limit pressure threshold value, and the third pressure regulating valve (23) is conducted only when the pressure of the oil liquid flowing out of the first oil inlet and outlet (25) is higher than the first upper limit pressure threshold value;

the fourth pressure regulating valve (33) is used for setting a second upper limit pressure threshold value, and the fourth pressure regulating valve (33) is conducted only when the pressure of the oil liquid flowing out of the second oil inlet/outlet (35) is higher than the second upper limit pressure threshold value.

8. The adjustable suspension system of any one of claims 4 to 7 wherein:

and a bidirectional electric liquid pump (40) is arranged on an oil path between the first control valve group (20) and the second control valve group (30).

9. The adjustable suspension system of claim 8 wherein:

and a first energy accumulator (28) is arranged on an oil path between the two-way electric liquid pump (40) and the first control valve group (20), and/or a second energy accumulator (38) is arranged on an oil path between the two-way electric liquid pump (40) and the second control valve group (30).

10. A vehicle, characterized in that:

an adjustable suspension system as claimed in any one of claims 1 to 9 in a vehicle.

Images