Active suspension system and vehicle

Abstract

The utility model provides an active suspension system and a vehicle, and relates to the technical field of vehicle vibration reduction, the active suspension system comprises a power device, a first liquid supply pipe, a first control valve and a first telescopic cylinder, the power device, the first liquid supply pipe and the first control valve are communicated in sequence, the power device is used for pumping a medium in a medium source into the first liquid supply pipe; a first cavity of the first telescopic cylinder communicates with the first outlet end of the first control valve, a second cavity of the first telescopic cylinder communicates with the second outlet end of the first control valve, and the first telescopic cylinder is installed between a vehicle body and a wheel assembly. The first telescopic cylinder can push and pull at least one of the vehicle body and the wheel assembly to stretch out or retract in the first direction so that the distance between the vehicle body and the wheel assembly can be conveniently adjusted. The height of the vehicle body can be actively adjusted, response is fast, cost is low, and arrangement is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle vibration reduction, in particular to an active suspension system and a vehicle. Background Art

[0002] When a vehicle is driving, it is affected by the unevenness of the road surface, and the sprung mass and unsprung mass of the vehicle will produce relative displacement, resulting in vehicle vibration. The suspension system is an important component in the automobile chassis that plays a vibration reduction role. It is located between the body and the wheels to cushion and attenuate the impact and vibration caused by the unevenness of the road surface, and to transmit various forces and moments acting between the wheels to improve the vehicle's smoothness and handling stability.

[0003] In the related art, air springs and adjustable shock absorbers are often used to form active suspensions to adjust the shock absorber damping force and vehicle height under different working conditions. However, the air springs as active suspension actuators respond relatively slowly and require an additional air supply system, which increases costs and makes layout difficult. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of one aspect of the utility model provides an active suspension system, which can realize active adjustment of the vehicle body height, has a fast response, low cost and convenient layout.

[0006] Another aspect of the present invention provides a vehicle.

[0007] According to an embodiment of the utility model, an active suspension system includes a power device, a first liquid supply pipe, a first control valve and a first telescopic cylinder. The power device, the first liquid supply pipe and the first control valve are connected in sequence. The power device is used to pump a medium in a medium source into the first liquid supply pipe; the first chamber of the first telescopic cylinder is connected to the first outlet end of the first control valve, the second chamber of the first telescopic cylinder is connected to the second outlet end of the first control valve, the first telescopic cylinder is installed between the vehicle body and the wheel assembly, and the first telescopic cylinder can push and pull at least one of the vehicle body and the wheel assembly to extend or retract in a first direction to adjust the distance between the vehicle body and the wheel assembly.

[0008] According to the active suspension system of the embodiment of the utility model, the power device can pump the medium in the medium source to the first chamber or the second chamber of the first telescopic cylinder through the first liquid supply pipe and the first control valve pump to control the telescopic action of the first telescopic cylinder, so that the first telescopic cylinder can push out or retract at least one of the vehicle body and the wheel assembly along the first direction to adjust the distance between the vehicle body and the wheel assembly, that is, according to the actual working conditions during the driving process of the vehicle, the vehicle body height is actively adjusted or maintained through the cooperation of the power device, the first liquid supply pipe, the first control valve and the first telescopic cylinder, thereby improving the smoothness and handling performance of the whole vehicle. Therefore, compared with the related art, the active suspension system in the utility model can realize active adjustment of the vehicle body height, has a faster response, low cost and convenient layout.

[0009] In some embodiments, the active suspension system also includes a second fluid supply pipe, a second control valve and a second telescopic cylinder, the power device, the second fluid supply pipe and the second control valve are connected in sequence; the first chamber of the second telescopic cylinder is connected to the first outlet end of the second control valve, and the second chamber of the second telescopic cylinder is connected to the second outlet end of the second control valve, the vehicle body, the second telescopic cylinder, the first telescopic cylinder and the wheel assembly are arranged and connected in sequence along the first direction, and the second telescopic cylinder can push and pull the vehicle body to extend or retract along the first direction.

[0010] In some embodiments, the active suspension system also includes an elastic member and a mounting seat, the elastic member is sleeved on the outer peripheral side of the second telescopic cylinder, the mounting seat is connected to at least one of the first telescopic cylinder and the second telescopic cylinder, and the elastic member is clamped between the vehicle body and the mounting seat.

[0011] In some embodiments, each of the first telescopic cylinder and the second telescopic cylinder includes a cylinder body, a piston and a piston rod. The cylinder body of the first telescopic cylinder is connected to the cylinder body of the second telescopic cylinder. The cylinder body has a piston cavity. The piston is slidably engaged in the piston cavity along the first direction and divides the piston cavity into the first cavity and the second cavity. The piston rod of the first telescopic cylinder is connected to the corresponding piston and the wheel assembly, and the piston rod of the second telescopic cylinder is connected to the corresponding piston and the vehicle body; the piston rod of the first telescopic cylinder is coaxial with the piston rod of the second telescopic cylinder.

[0012] In some embodiments, the active suspension system further comprises an elastic connector, and the elastic connector is provided at least one of between the piston rod of the first telescopic cylinder and the wheel assembly and between the piston rod of the second telescopic cylinder and the vehicle body.

[0013] In some embodiments, the active suspension system further includes at least two accumulators, one of which is located between the power device and the first control valve and connected to the first fluid supply pipe, and the other of which is located between the power device and the second control valve and connected to the second fluid supply pipe.

[0014] In some embodiments, the active suspension system further includes a damping element, and the damping element is provided at least one of between the first chamber of the first telescopic cylinder and the first outlet end of the first control valve, between the second chamber of the first telescopic cylinder and the second outlet end of the first control valve, between the first chamber of the second telescopic cylinder and the first outlet end of the second control valve, and between the second chamber of the second telescopic cylinder and the second outlet end of the second control valve.

[0015] In some embodiments, the damping element is a damping hole or a damping conduit.

[0016] A vehicle according to an embodiment of the utility model includes an active suspension system and a feedforward device, wherein the active suspension system is the active suspension system described in any of the above embodiments; the feedforward device is electrically connected to the active suspension system, and the feedforward device is used to monitor road condition information and communicate with the active suspension system, wherein the road condition information includes at least one parameter information of road surface flatness, road surface obstacles and obstacle size.

[0017] According to the vehicle of the embodiment of the utility model, the active suspension system is designed to adopt a structure that cooperates with a power device, a first liquid supply pipe, a first control valve and a first telescopic cylinder, which can actively adjust or maintain the height of the vehicle body, so that the active suspension system responds quickly to the adjustment of the vehicle body height, and communicates with the feedforward device to adjust the vehicle body height in advance, thereby improving the vehicle's passability and stability.

[0018] In some embodiments, the vehicle further includes an electrical device, wherein the electrical device is electrically connected to a power device of the active suspension system so that the power device provides electrical energy to the electrical device.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an active suspension system according to an embodiment of the utility model.

[0021] Figure 2 It is a schematic diagram of series and parallel connection between a first telescopic cylinder, a second telescopic cylinder and an elastic member in an active suspension system according to an embodiment of the utility model.

[0022] Figure numerals: 1. power device, 2. first liquid supply pipe, 3. first control valve, 4. first telescopic cylinder, 41. cylinder body, 42. piston, 43. piston rod, 5. second liquid supply pipe, 6. second control valve, 7. second telescopic cylinder, 8. elastic member, 81. mounting seat, 9. accumulator, 91. damping element, 92. elastic connecting member. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0024] like Figure 1 and Figure 2 As shown, an active suspension system of an embodiment of the utility model includes a power device 1, a first liquid supply pipe 2, a first control valve 3 and a first telescopic cylinder 4. The power device 1, the first liquid supply pipe 2 and the first control valve 3 are connected in sequence, and the power device 1 is used to pump the medium in the medium source into the first liquid supply pipe 2; the first chamber of the first telescopic cylinder 4 is connected to the first outlet end of the first control valve 3, and the second chamber of the first telescopic cylinder 4 is connected to the second outlet end of the first control valve 3. The first telescopic cylinder 4 is installed between the body and the wheel assembly, and the first telescopic cylinder 4 can push and pull at least one of the body and the wheel assembly to extend or retract along the first direction, that is, the first telescopic cylinder 4 can push and pull one of the body and the wheel assembly alone, or push and pull both the body and the wheel assembly, so as to adjust the spacing between the body and the wheel assembly.

[0025] According to the active suspension system of the embodiment of the utility model, the power device 1 can pump the medium in the medium source to the first chamber or the second chamber of the first telescopic cylinder 4 through the first liquid supply pipe 2 and the first control valve 3 to control the telescopic action of the first telescopic cylinder 4, so that the first telescopic cylinder 4 can push out or retract at least one of the vehicle body and the wheel assembly along the first direction to adjust the distance between the vehicle body and the wheel assembly, that is, according to the actual working conditions during the driving process of the vehicle, through the cooperation of the power device 1, the first liquid supply pipe 2, the first control valve 3 and the first telescopic cylinder 4, the vehicle body height is actively adjusted or maintained, thereby improving the smooth performance and handling stability of the whole vehicle. Therefore, compared with the related art, the active suspension system in the utility model can realize active adjustment of the vehicle body height, has a faster response, low cost and convenient layout.

[0026] Specifically, the power device 1 may include a motor and a hydraulic pump driven by the motor, the liquid inlet of the hydraulic pump is connected to the medium source, and the liquid outlet of the hydraulic pump is connected to the first liquid supply pipe 2. The medium in the medium source may not be limited to hydraulic oil. The first direction may be the height direction of the vehicle body, that is, Figure 1The vehicle body, the first telescopic cylinder 4 and the wheel assembly can be arranged in sequence from top to bottom. The first control valve 3 is not limited to a three-way solenoid valve. The specific specifications and selection of the motor, the hydraulic pump, the first control valve 3 and the first telescopic cylinder 4 can be designed in accordance with the load and specifications, cost and service life of the vehicle body and the wheel assembly, and will not be elaborated here.

[0027] It can be understood that when the first control valve 3 controls any one of the first chamber and the second chamber of the first telescopic cylinder 4 to be connected to the first liquid supply pipe 2, the telescopic action of the first telescopic cylinder 4 can be realized to adjust the distance between the vehicle body and the wheel assembly and change the height of the vehicle body. When the first control valve 3 is closed and the connection between each of the first chamber and the second chamber of the first telescopic cylinder 4 and the first liquid supply pipe 2 is cut off, the first telescopic cylinder 4 has no active action and the vehicle body maintains a certain height.

[0028] like Figure 1 and Figure 2 As shown, in some embodiments, the active suspension system also includes a second liquid supply pipe 5, a second control valve 6 and a second telescopic cylinder 7, and the power device 1, the second liquid supply pipe 5 and the second control valve 6 are connected in sequence; the first chamber of the second telescopic cylinder 7 is connected to the first outlet end of the second control valve 6, and the second chamber of the second telescopic cylinder 7 is connected to the second outlet end of the second control valve 6. The vehicle body, the second telescopic cylinder 7, the first telescopic cylinder 4 and the wheel assembly are arranged and connected in sequence along the first direction, and the second telescopic cylinder 7 can push and pull the vehicle body to extend or retract along the first direction.

[0029] The power device 1 can pump the medium in the medium source to the first chamber or the second chamber of the second telescopic cylinder 7 through the second liquid supply pipe 5 and the second control valve 6 to control the telescopic action of the second telescopic cylinder 7, so that the second telescopic cylinder 7 can lift or lower the vehicle body along the height direction of the vehicle body to actively achieve vibration reduction of the vehicle body in the height direction with a faster response. At the same time, because it is arranged in series with the first telescopic cylinder 4 (that is, the two are arranged in the height direction of the vehicle body), compared with the parallel arrangement of the shock absorber and the structure for adjusting the height of the vehicle body in the related art, the utility model has high integration, convenient layout, and does not occupy additional lateral space.

[0030] It can be understood that when the second control valve 6 controls any one of the first chamber and the second chamber of the second telescopic cylinder 7 to be connected to the second liquid supply pipe 5, the telescopic action of the second telescopic cylinder 7 can be realized to lift or lower the vehicle body and realize active vibration reduction action, and when the second control valve 6 is closed and the connection between each of the first chamber and the second chamber of the second telescopic cylinder 7 and the second liquid supply pipe 5 is cut off, the second telescopic cylinder 7 has no active action.

[0031] Specifically, the hydraulic pump can operate in both directions so that the same hydraulic pump can meet the time-sharing or simultaneous liquid supply requirements of the first liquid supply pipe 2 and the second liquid supply pipe 5. One of the liquid outlet ends of the hydraulic pump is connected to the second liquid supply pipe 5. The vehicle body, the second telescopic cylinder 7, the first telescopic cylinder 4 and the wheel assembly can be arranged and connected in sequence from top to bottom. The first telescopic cylinder 4 controls the telescopic movement of the wheel assembly in the height direction, and the second telescopic cylinder 7 controls the telescopic movement of the vehicle body in the height direction. The second control valve 6 is not limited to the use of a three-way solenoid valve. The specific specifications and selection of the second control valve 6 and the second telescopic cylinder 7 can be comprehensively considered. The corresponding design of the load and specifications, cost and service life of the vehicle body and wheel assembly will not be expanded here.

[0032] It is understandable that the vehicle height adjustment and active suspension damping force adjustment can be achieved by using a single motor and hydraulic pump, without the need for additional equipment such as air supply equipment, thus saving costs.

[0033] It should be noted that in the relevant technology, suspension systems usually include three types: the first is the traditional passive suspension composed of coil springs and conventional shock absorbers, which can only maintain the smoothness and handling performance of a few working conditions, and the smoothness and handling performance of other working conditions can only be compromised; the second is the semi-active suspension composed of coil springs and adjustable shock absorbers, which can adjust the damping force of the shock absorber in real time under different working conditions to improve the smoothness and handling performance of the whole vehicle, but because it can only passively adjust the damping force characteristics and cannot output active driving force, its suspension performance improvement effect is limited; the third is the active suspension composed of air springs and adjustable shock absorbers, which can adjust the damping force of the shock absorber and the vehicle body height in real time under different working conditions to improve the smoothness and handling performance of the whole vehicle, but the air spring as an active suspension actuator responds relatively slowly, and its suspension performance improvement effect is limited. The active suspension system in the present invention adopts a structure in which a hydraulic system is coordinated with a telescopic cylinder to achieve full active vibration reduction (i.e., active adjustment of the damping force of the shock absorber) and active adjustment of the vehicle body height under different working conditions. Compared with related technologies, the active actuation mode responds faster, so it can effectively improve the suspension performance.

[0034] like Figure 1 and Figure 2 As shown, in some embodiments, the active suspension system also includes an elastic member 8 and a mounting seat 81, the elastic member 8 is sleeved on the outer peripheral side of the second telescopic cylinder 7, the mounting seat 81 is connected to at least one of the first telescopic cylinder 4 and the second telescopic cylinder 7, and the elastic member 8 is clamped between the vehicle body and the mounting seat 81.

[0035] The elastic member 8 is arranged in parallel with the second telescopic cylinder 7 (i.e., the two are nested), and the two together construct a suspension vibration reduction unit structure, so that the elastic member 8 can assist the vehicle body in real-time vibration reduction during the active vibration reduction response process of the second telescopic cylinder 7, further ensuring the vibration reduction reliability.

[0036] Specifically, the elastic member 8 may extend in the height direction of the vehicle body. The upper end of the elastic member 8 may be connected to the vehicle body, and the lower end of the elastic member 8 may be connected to the mounting seat 81 to improve the vibration reduction reliability. The elastic member 8 may not be limited to a coil spring, and other flexible components that can achieve smooth expansion and contraction may be used, such as an air spring. The mounting seat 81 may be connected to one of the first telescopic cylinder 4 and the second telescopic cylinder 7 alone, or to both the first telescopic cylinder 4 and the second telescopic cylinder 7.

[0037] It can be understood that, because the elastic member 8 itself has elastic properties, when the vehicle body vibrates, the second telescopic cylinder 7 still has an extremely short response phase (that is, a reaction phase before active vibration reduction), while the elastic member 8 has no response phase and can reduce vibration of the vehicle body in real time, thereby ensuring the reliability of vibration reduction.

[0038] like Figure 1 and Figure 2 As shown, in some embodiments, each of the first telescopic cylinder 4 and the second telescopic cylinder 7 includes a cylinder body 41, a piston 42 and a piston rod 43. The cylinder body 41 of the first telescopic cylinder 4 is connected to the cylinder body 41 of the second telescopic cylinder 7. The cylinder body 41 has a piston cavity. The piston 42 is slidably fitted in the piston cavity along a first direction and divides the piston cavity into a first cavity and a second cavity. The piston rod 43 of the first telescopic cylinder 4 is connected to the corresponding piston 42 and the wheel assembly, and the piston rod 43 of the second telescopic cylinder 7 is connected to the corresponding piston 42 and the vehicle body; the piston rod 43 of the first telescopic cylinder 4 is coaxial with the piston rod 43 of the second telescopic cylinder 7.

[0039] The piston rod 43 of the first telescopic cylinder 4 and the piston rod 43 of the second telescopic cylinder 7 are coaxially arranged, and the cylinder bodies 41 of the two are connected, so that the adjustment process of the first telescopic cylinder 4 and the second telescopic cylinder 7 has good stability.

[0040] Specifically, in order to reduce the difficulty of processing the first telescopic cylinder 4 and the second telescopic cylinder 7, the cylinder bodies 41, piston chambers and piston rods 43 of the two can extend along the height direction of the vehicle body and be coaxial. The second chamber of the second telescopic cylinder 7, the first chamber of the second telescopic cylinder 7, the first chamber of the first telescopic cylinder 4 and the second chamber of the first telescopic cylinder 4 are arranged in sequence from top to bottom, wherein the second chamber of the second telescopic cylinder 7 corresponds to Figure 1 The upper chamber of the second telescopic cylinder 7 corresponds to the first chamber of the second telescopic cylinder 7. Figure 1 The lower chamber of the second telescopic cylinder 7 corresponds to the first chamber of the first telescopic cylinder 4. Figure 1 The upper chamber of the first telescopic cylinder 4 and the second chamber of the first telescopic cylinder 4 correspond to Figure 1 The lower chamber of the first telescopic cylinder 4. The mounting seat 81 can be connected to the outer peripheral wall of the cylinder body 41 of the second telescopic cylinder 7.

[0041] It should be noted that the cylinder body 41 of the first telescopic cylinder 4 and the cylinder body 41 of the second telescopic cylinder 7 can be a structure in which independent cylinder bodies 41 are connected, or the cylinder bodies 41 of the two can be integrated into one, that is, the two use the same long cylinder body 41, and a partition can be used to separate the inner cavity of the long cylinder body 41 into a structure of two piston chambers arranged along the height direction of the vehicle body, so that the first telescopic cylinder 4 and the second telescopic cylinder 7 can be arranged on the same base, thereby improving the structural reliability and making the arrangement more convenient.

[0042] like Figure 1 and Figure 2 As shown, in some embodiments, the active suspension system also includes at least two accumulators 9, one accumulator 9 is located between the power device 1 and the first control valve 3 and is connected to the first fluid supply pipe 2, and the other accumulator 9 is located between the power device 1 and the second control valve 6 and is connected to the second fluid supply pipe 5.

[0043] The use of the accumulator 9 can ensure that the hydraulic pressure supplied to the first telescopic cylinder 4 or the second telescopic cylinder 7 remains unchanged, so as to ensure reliable operation of the system.

[0044] Specifically, an accumulator 9 may be provided between the power device 1 and the first control valve 3, and between the power device 1 and the second control valve 6. The accumulator 9 is divided into a first chamber and a second chamber by a floating piston 42 therein. The first chamber of the accumulator 9 may store oil, and the second chamber of the accumulator 9 may contain nitrogen, air or other suitable compressible gas. The specific structure and working principle thereof may adopt the prior art in the art, and will not be elaborated here.

[0045] like Figure 1 and Figure 2 As shown, in some embodiments, the active suspension system also includes a damping element 91, and a damping element 91 is provided in at least one of between the first chamber of the first telescopic cylinder 4 and the first outlet end of the first control valve 3, between the second chamber of the first telescopic cylinder 4 and the second outlet end of the first control valve 3, between the first chamber of the second telescopic cylinder 7 and the first outlet end of the second control valve 6, and between the second chamber of the second telescopic cylinder 7 and the second outlet end of the second control valve 6.

[0046] Adding a damping element 91 in the fluid path conveying the fluid to the first telescopic cylinder 4 or the second telescopic cylinder 7 can accelerate the oscillation dissipation when the fluid path is under-damped, thereby increasing the comfort of passengers riding in the vehicle.

[0047] Specifically, each of the first chamber of the first telescopic cylinder 4 and the first outlet end of the first control valve 3, the second chamber of the first telescopic cylinder 4 and the second outlet end of the first control valve 3, the first chamber of the second telescopic cylinder 7 and the first outlet end of the second control valve 6, and the second chamber of the second telescopic cylinder 7 and the second outlet end of the second control valve 6 is communicated through a branch pipeline. The damping element 91 may be installed on the branch pipeline.

[0048] Preferably, damping elements 91 are installed on all branch pipelines to effectively avoid the under-damping problem in the fluid circuit and improve the riding experience of passengers.

[0049] It should be noted that due to the uneven road surface, the interaction between the wheel assembly and the discontinuous components will cause fluid oscillations, and the fluid circuit in the hydraulic system is under-damped at low flow rate oscillations (that is, the damping level may not be sufficient to dissipate the oscillations at a sufficiently fast rate), and such oscillations will generate fluctuating forces in the first telescopic cylinder 4 and the second telescopic cylinder 7, which can be transmitted to the vehicle body through the piston rod 43 and sensed by the vehicle passengers.

[0050] like Figure 1 and Figure 2 As shown, in some embodiments, the damping element 91 is a damping hole or a damping conduit, so that the damping hole or the damping conduit generates additional damping force on the fluid circuit.

[0051] like Figure 1 and Figure 2 As shown, in order to avoid the risk of component damage caused by accidental collision between the vehicle body and the piston rod 43 of the second telescopic cylinder 7, between the wheel assembly and the piston rod 43 of the first telescopic cylinder 4, and between the vehicle body and the wheel assembly and other components, and to improve the safety and reliability of vibration reduction or vehicle body height adjustment, in some embodiments, the active suspension system also includes an elastic connecting member 92, and at least one of the piston rod 43 of the first telescopic cylinder 4 and the wheel assembly, and the piston rod 43 of the second telescopic cylinder 7 and the vehicle body is provided with an elastic connecting member 92.

[0052] Specifically, the elastic connecting member 92 is not limited to a coil spring, and any other flexible component that can achieve smooth extension and retraction may be used.

[0053] Preferably, the piston rod 43 of the first telescopic cylinder 4 and the wheel assembly, and the piston rod 43 of the second telescopic cylinder 7 and the vehicle body are each connected via an elastic connecting member 92 .

[0054] like Figure 1 and Figure 2 As shown, a vehicle of an embodiment of the utility model includes an active suspension system and a feedforward device (not shown in the figure), the active suspension system is the active suspension system of any of the above embodiments; the feedforward device is electrically connected to the active suspension system, the feedforward device is used to monitor road condition information and communicate with the active suspension system, the road condition information includes at least one parameter information of road surface flatness, road obstacles and obstacle size.

[0055] According to the vehicle of the embodiment of the utility model, the active suspension system is designed to adopt a structure that cooperates with a power device 1, a first liquid supply pipe 2, a first control valve 3 and a first telescopic cylinder 4, which can actively adjust or maintain the height of the vehicle body, so that the active suspension system responds quickly to the adjustment of the vehicle body height, and communicates with the feedforward device to adjust the vehicle body height in advance, thereby improving the vehicle's passability and stability.

[0056] It should be noted that the feedforward device may include other suitable devices that can identify the road conditions ahead, such as a camera. When the feedforward device identifies that there is a large obstacle on the road ahead, which will affect the driving safety of the vehicle at the current vehicle height, it communicates with the active suspension system, the power device 1 is actuated, and the first telescopic cylinder 4 is controlled to lift the vehicle; when the feedforward device identifies that there is a pothole on the road, it communicates with the active suspension system, the power device 1 is actuated, and the first telescopic cylinder 4 is controlled to lower the vehicle.

[0057] like Figure 1 and Figure 2 As shown, in some embodiments, the vehicle further includes an electrical device (not shown in the figure), which is electrically connected to the power device 1 of the active suspension system so that the power device 1 provides electrical energy to the electrical device.

[0058] When the first telescopic cylinder 4 or the second telescopic cylinder 7 is in passive motion (such as when stimulated by the road surface, the active suspension system will be displaced), the power device 1 can be transformed into a power generation structure, that is, the first telescopic cylinder 4 or the second telescopic cylinder 7 will drive the hydraulic pump and use the motor to generate electricity (in this process, the hydraulic pump is used as a hydraulic motor and the motor is used as a generator) to achieve energy recovery and make full use of energy.

[0059] Now, combined with the specific structure of the active suspension system, its working process is described as follows:

[0060] When the vehicle body height needs to be raised, the motor is turned on, the first control valve 3 works, the hydraulic pump pumps high-pressure liquid into the first chamber of the first telescopic cylinder 4, and the excess liquid in the second chamber of the first telescopic cylinder 4 is discharged and enters the first chamber of the accumulator 9;

[0061] When the height of the vehicle body needs to be lowered, the first control valve 3 works, and the liquid in the first chamber of the first telescopic cylinder 4 can be discharged into the first chamber of the accumulator 9 by the weight of the vehicle body. If the lowering speed of the vehicle body needs to be accelerated, the motor is turned on, and the hydraulic pump pumps the liquid into the second chamber of the first telescopic cylinder 4; if the lowering speed of the vehicle body needs to be controlled, the motor is also turned on, and the hydraulic pump pumps the liquid into the first chamber of the first telescopic cylinder 4.

[0062] When there is no need to adjust the vehicle body height, the first control valve 3 is closed, the vehicle body maintains a certain height, and the second control valve 6 and the motor adjust the damping force of the suspension vibration reduction unit in real time according to the control strategy of different working conditions to improve the smoothness and handling performance of the vehicle.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0068] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An active suspension system, characterized in that: include: A power device, a first liquid supply pipe and a first control valve, wherein the power device, the first liquid supply pipe and the first control valve are connected in sequence, and the power device is used to pump the medium in the medium source into the first liquid supply pipe; as well as A first telescopic cylinder, wherein the first chamber of the first telescopic cylinder is communicated with the first outlet end of the first control valve, the second chamber of the first telescopic cylinder is communicated with the second outlet end of the first control valve, the first telescopic cylinder is installed between the vehicle body and the wheel assembly, and the first telescopic cylinder can push or pull at least one of the vehicle body and the wheel assembly to extend or retract in a first direction so as to adjust the distance between the vehicle body and the wheel assembly.

2. The active suspension system according to claim 1, characterized in that: Also includes: a second liquid supply pipe and a second control valve, wherein the power device, the second liquid supply pipe and the second control valve are connected in sequence; as well as A second telescopic cylinder, the first chamber of the second telescopic cylinder is connected to the first outlet end of the second control valve, the second chamber of the second telescopic cylinder is connected to the second outlet end of the second control valve, the vehicle body, the second telescopic cylinder, the first telescopic cylinder and the wheel assembly are arranged and connected in sequence along the first direction, and the second telescopic cylinder can push and pull the vehicle body to extend or retract along the first direction.

3. The active suspension system according to claim 2, characterized in that: It also includes an elastic member and a mounting seat, wherein the elastic member is sleeved on the outer peripheral side of the second telescopic cylinder, the mounting seat is connected to at least one of the first telescopic cylinder and the second telescopic cylinder, and the elastic member is clamped between the vehicle body and the mounting seat.

4. The active suspension system according to claim 3, characterized in that: Each of the first telescopic cylinder and the second telescopic cylinder comprises a cylinder body, a piston and a piston rod, the cylinder body of the first telescopic cylinder is connected to the cylinder body of the second telescopic cylinder, the cylinder body has a piston cavity, the piston is slidably fitted in the piston cavity along the first direction and divides the piston cavity into the first cavity and the second cavity, the piston rod of the first telescopic cylinder is connected to the corresponding piston and the wheel assembly, and the piston rod of the second telescopic cylinder is connected to the corresponding piston and the vehicle body; The piston rod of the first telescopic cylinder is coaxial with the piston rod of the second telescopic cylinder.

5. The active suspension system according to claim 4, characterized in that: It also includes an elastic connecting member, and the elastic connecting member is provided at least one of between the piston rod of the first telescopic cylinder and the wheel assembly and between the piston rod of the second telescopic cylinder and the vehicle body.

6. The active suspension system according to any one of claims 2 to 5, characterized in that: It also includes at least two accumulators, one of which is located between the power device and the first control valve and is connected to the first fluid supply pipe, and the other of which is located between the power device and the second control valve and is connected to the second fluid supply pipe.

7. The active suspension system according to claim 6, characterized in that: It also includes a damping element, which is provided at least one of between the first chamber of the first telescopic cylinder and the first outlet end of the first control valve, between the second chamber of the first telescopic cylinder and the second outlet end of the first control valve, between the first chamber of the second telescopic cylinder and the first outlet end of the second control valve, and between the second chamber of the second telescopic cylinder and the second outlet end of the second control valve.

8. The active suspension system according to claim 7, characterized in that: The damping element is a damping hole or a damping conduit.

9. A vehicle, characterized in that: include: An active suspension system, wherein the active suspension system is the active suspension system according to any one of claims 1 to 8; and A feedforward device, the feedforward device is electrically connected to the active suspension system, the feedforward device is used to monitor road condition information and communicate with the active suspension system, the road condition information includes at least one parameter information of road surface flatness, road surface obstacles and obstacle size.

10. The vehicle according to claim 9, characterized in that It also includes an electric device, which is electrically connected to the power device of the active suspension system so that the power device can provide electrical energy to the electric device.

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