Fully active air suspension and vehicle

Abstract

A fully active air suspension, which relates to the technical field of vehicles. The fully active air suspension comprises a cantilever and a damping device that are configured to be connected to an axle. The damping device comprises a valve seat assembly (1) and a piston portion (5), wherein the valve seat assembly is connected to a vehicle body, the piston portion comprises a first end and a second end that are opposite to each other in a first direction, the valve seat assembly comprises a first oil cylinder (14) extending in the first direction, the first end of the piston portion is arranged in the first oil cylinder to separate the first oil cylinder into a compression cylinder (141) and a rebound cylinder (142) that are sealed from each other, the first end of the piston portion can slide in the first oil cylinder in the first direction, and the second end of the piston portion is connected to the cantilever. Further disclosed is a vehicle. On the basis of the fully active air suspension and the vehicle, the handling performance, acceleration performance and comfort of the vehicle are improved, and the service life of an air spring is prolonged.

Description

Full active air suspension and automobile

[0001] Cross-reference to related applications

[0002] The present application claims priority to the patent application No. 2024109446990, filed on July 15, 2024, with the China National Intellectual Property Office and entitled "Full active air suspension and automobile", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the automobile technical field, in particular to a full active air suspension and automobile. BACKGROUND

[0004] Suspension is an important part of the automobile, which needs to meet the requirements of the automobile ride comfort and handling stability. Active suspension is a kind of system with function, when the automobile load, driving speed, road conditions and other driving conditions change, the active suspension system can automatically adjust the suspension stiffness (including overall adjustment and individual adjustment of each wheel), so as to meet the requirements of automobile ride comfort, handling stability and other aspects. Today's active suspension shows its superiority in improving the ride comfort and handling stability of the automobile.

[0005] However, in order to realize the automatic adjustment of the active suspension, one end of the connecting suspension arm of the air spring needs to be equipped with an active damper valve seat with a valve body and a controller, which on the one hand leads to the active damper valve seat occupying a large amount of suspension movement space, affecting the volume arrangement of the air spring, and further causing the air spring to work in a high load state for a long time, which greatly affects the service life of the air spring; on the other hand, the active damper is arranged on the suspension, which leads to a large unsprung mass of the active suspension, affecting the handling performance, acceleration performance and comfort of the automobile.

[0006] SUMMARY

[0007] The present application aims to provide a full active air suspension and automobile, which solves the technical problems that the active damper valve seat occupies a large amount of suspension movement space, affects the volume arrangement of the air spring, and further causes the air spring to work in a high load state for a long time, which greatly affects the service life of the air spring, and the active damper is arranged on the suspension, which leads to a large unsprung mass of the active suspension, affecting the handling performance, acceleration performance and comfort of the automobile.

[0008] According to one embodiment of the present application, a full active air suspension is provided, comprising a suspension arm for connecting with an axle and a damping device, the damping device comprising a valve seat assembly and a piston part, the valve seat assembly being connected with a vehicle body, the piston part comprising a first end and a second end opposite to each other in a first direction, the valve seat assembly comprising a first oil cylinder extending in the first direction, the first end of the piston part being arranged in the first oil cylinder to divide the first oil cylinder into a compression cylinder and a recovery cylinder, and the first end of the piston part being capable of sliding in the first oil cylinder in the first direction, and the second end of the piston part being connected with the suspension arm.

[0009] In one embodiment of the present application, the valve seat assembly further comprises a second oil cylinder and a valve seat body, the second oil cylinder being sleeved outside the first oil cylinder and being in communication with the recovery cylinder;

[0010] The ends of both the first oil cylinder and the second oil cylinder away from the suspension arm are connected with the valve seat body;

[0011] The valve seat body is provided with a compression oil passage and a recovery oil passage, the compression oil passage being in communication with the compression cylinder via the valve seat body, and the recovery oil passage being in communication with the recovery cylinder via the valve seat body and the second oil cylinder in sequence.

[0012] In one embodiment of the present application, the valve seat assembly further comprises a plug part, the ends of both the first oil cylinder and the second oil cylinder close to the suspension arm are sealed from the outside via the plug part;

[0013] The recovery cylinder and the second oil cylinder are in communication via the plug part;

[0014] The piston part penetrates through the plug part in the first direction.

[0015] In one embodiment of the present application, further comprising:

[0016] A bidirectional hydraulic pump, the compression oil passage and the recovery oil passage being connected with the bidirectional hydraulic pump respectively;

[0017] A compression valve arranged in the valve seat body, the compression oil passage being in communication with the first oil cylinder via the compression valve;

[0018] A recovery valve arranged in the valve seat body, the recovery oil passage being in communication with the second oil cylinder via the recovery valve;

[0019] A first accumulator arranged in the compression oil passage for energy storage of the compression oil passage;

[0020] A second accumulator arranged in the recovery oil passage for energy storage of the recovery oil passage.

[0021] In one embodiment of the present application, the valve seat assembly further comprises an energy storage mounting box, the energy storage mounting box being fixedly connected with the valve seat body, and the first accumulator and the second accumulator being arranged in the energy storage mounting box.

[0022] In one embodiment of the present application, further comprising:

[0023] The first pressure sensor is arranged in the compression oil line and is configured to detect the pressure in the compression oil line.

[0024] The second pressure sensor is arranged in the recovery oil line and is configured to detect the pressure in the recovery oil line.

[0025] In an embodiment of the present application, the compression oil line is provided with a first interface and a second interface, the first interface is arranged at the end of the valve seat body in the first direction, and the second interface is arranged at the side wall of the valve seat body, both the bidirectional hydraulic pump and the first pressure sensor can be docked with the first interface and the second interface.

[0026] And / or, the recovery oil line is provided with a third interface and a fourth interface, the third interface is arranged at the end of the valve seat body in the first direction, and the fourth interface is arranged at the side wall of the valve seat body, both the bidirectional hydraulic pump and the second pressure sensor can be docked with the third interface and the fourth interface.

[0027] In an embodiment of the present application, the damping device further comprises:

[0028] The upper top seat, the valve seat assembly is fixed to the vehicle body via the upper top seat;

[0029] The capsule skin is sleeved outside the second oil cylinder, and one end of the capsule skin is clamped to the upper top seat;

[0030] The piston outer cylinder, the other end of the capsule skin is clamped to the end of the piston outer cylinder close to the valve seat assembly in the first direction, and the second end of the piston part is connected to the other end of the piston outer cylinder.

[0031] In an embodiment of the present application, the damping device further comprises:

[0032] The protection cylinder part is clamped outside the capsule skin;

[0033] The bushing is arranged at the end of the piston outer cylinder away from the valve seat assembly, and the piston part is connected to the piston outer cylinder via the bushing;

[0034] The buffer part is arranged between the piston outer cylinder and the piston part, and extends a predetermined distance from the bushing to the first oil cylinder in the first direction.

[0035] According to the second aspect of the present application, an automobile is provided, which comprises a vehicle body and the full-active air suspension according to any one of the technical solutions described above, so that the automobile has all the beneficial technical effects of the full-active air suspension, which will not be described here.

[0036] Compared with the related art, the present application has the following beneficial effects:

[0037] The full active air suspension provided by the application, by inverting the valve seat assembly, connecting the valve seat assembly with the vehicle body, and connecting the second end of the piston part with the suspension arm, on the one hand, relative to the related valve seat, the application sets the valve seat assembly on the vehicle body, effectively reduces the unsprung mass, and further improves the handling performance, acceleration performance and comfort of the vehicle; on the other hand, the second end of the piston part is directly connected with the suspension arm, so that the damping device does not have to be in the high load position of the air spring for a long time in the working state, and the service life of the air spring is improved.

[0038] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the specific embodiments or related technologies, the following will briefly introduce the drawings needed to be used in the specific embodiments or related technology description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0040] Fig. 1 is a front view structural schematic diagram of the damping device provided by the embodiment of the application;

[0041] Fig. 2 is a cut structure schematic diagram of the damping device provided by Fig. 1 along A-A;

[0042] Fig. 3 is a cut structure schematic diagram of the damping device provided by Fig. 2 along B-B;

[0043] Fig. 4 is a cut structure schematic diagram of the damping device provided by Fig. 2 along C-C;

[0044] Fig. 5 is a cut structure schematic diagram of the damping device provided by Fig. 2 along D-D;

[0045] Fig. 6 is an oil circuit connection principle diagram of the full active air suspension provided by the application.

[0046] Reference signs: 1-valve seat assembly; 10-accumulation installation box; 110-compression oil way; 1101-first branch; 1102-second branch; 111-compression valve; 1111-first installation groove; 112-first accumulator; 120-recovery oil way; 1201-third branch; 1202-fourth branch; 121-recovery valve; 1211-second installation groove; 122-second accumulator; 13-valve seat body; 131-pump interface; 14-first oil cylinder; 141-compression cylinder; 142-recovery cylinder; 15-second oil cylinder; 16-plug part; 171-first pressure sensor; 172-second pressure sensor; 2-upper top seat; 21-hoop ring; 3-capsule skin; 31-protecting cylinder sleeve; 4-piston outer cylinder; 41-buffer part; 42-bush; 5-piston part; 51-piston head; 52-piston rod. F1-first direction; F2-second direction; F3-third direction. DETAILED DESCRIPTION

[0047] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application.

[0048] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0049] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0050] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms “first”, “second”, “third” are only for description purposes, and cannot be understood as indicating or implying relative importance.

[0051] The full-active air suspension and automobile according to some embodiments of the present application will be described below with reference to FIGS. 1 to 6.

[0052] Referring to FIGS. 1-6, embodiments of the present application provide a full active air suspension, which includes a suspension arm for connecting with an axle and a damping device. The damping device includes a valve seat assembly 1 and a piston part 5, the valve seat assembly 1 is connected with a vehicle body, the piston part 5 includes a first end and a second end opposite to each other along a first direction F1, the valve seat assembly 1 includes a first oil cylinder 14 extending along the first direction F1, the first end of the piston part 5 is arranged in the first oil cylinder 14 to divide the first oil cylinder 14 into a compression cylinder 141 and a recovery cylinder 142, and the first end of the piston part 5 is capable of sliding in the first oil cylinder 14 along the first direction F1, and the second end of the piston part 5 is connected with the suspension arm.

[0053] According to the full active air suspension provided by the above technical features, by inverting the valve seat assembly 1, i.e., connecting the valve seat assembly 1 with the vehicle body and connecting the second end of the piston part 5 with the suspension arm, on the one hand, relative to the related valve seat, the present application arranges the valve seat assembly 1 on the vehicle body, effectively reducing the unsprung mass, and further improving the handling performance, acceleration performance and comfort of the vehicle; on the other hand, by directly connecting the second end of the piston part 5 with the suspension arm, the air spring volume of the damping device can be arranged larger, and the increased volume can reduce the maximum working pressure of the air spring, and further make the damping device not necessarily be in the high load position of the air spring for a long time in the working state, and further improve the service life of the air spring.

[0054] It should be noted that the structures of the vehicle body and the suspension arm are related to the field of suspension, which will not be described here.

[0055] As shown in FIGS. 1-5, F1 shown in the figure can be an example of the above-mentioned first direction F1, for the convenience of description, two directions perpendicular to each other on a plane perpendicular to the first direction F1 are defined as a second direction F2 and a third direction F3, F2 shown in the figure can be an example of the above-mentioned second direction F2, and F3 shown in the figure can be an example of the above-mentioned third direction F3.

[0056] In the present embodiment, as shown in FIGS. 3-5, the piston part 5 can include a piston rod 52 extending along the first direction F1 and a piston head 51 arranged at the first end of the piston rod 52, the piston head 51 is sealingly connected with the inner wall of the first oil cylinder 14 to divide the first oil cylinder 14 into the compression cylinder 141 and the recovery cylinder 142. Taking the orientation shown in the figure as an example, the space of the first oil cylinder 14 above the piston head 51 is the compression cylinder 141, and the space of the first oil cylinder 14 below the piston head 51 is the recovery cylinder 142.

[0057] It should be noted that the structures and cooperation of the piston head 51, the piston rod 52 and the first oil cylinder 14 are related to the field of suspension, which will not be described here.

[0058] In the embodiment, as shown in FIGS. 3-6, the valve seat assembly 1 can further include a valve seat body 13, which can be arranged at one end of the compression cylinder 141 of the first oil cylinder 14, i.e., at the end of the damping device connected to the vehicle body, for arrangement of the compression oil passage 110 and the recovery oil passage 120, so that the compression oil passage 110 and the recovery oil passage 120 and the structures connected thereto are arranged on the side of the vehicle body, further reducing the unsprung mass of the suspension.

[0059] In the embodiment, as shown in FIGS. 3-5, the valve seat assembly 1 can further include a second oil cylinder 15, which is sleeved on the outside of the first oil cylinder 14 and communicates with the recovery oil cylinder.

[0060] Further, as shown in FIG. 3, the ends of the first oil cylinder 14 and the second oil cylinder 15 away from the suspension arm are connected to the valve seat body 13, which can be provided with the compression oil passage 110 and the recovery oil passage 120, wherein the compression oil passage 110 communicates with the compression cylinder 141 via the valve seat body 13, and the recovery oil passage 120 communicates with the recovery cylinder 142 via the valve seat body 13 and the second oil cylinder 15 in sequence, when the damping device is in the recovery state (i.e., the piston head 51 moves downward), the fluid in the recovery cylinder 142 can flow back to the recovery oil passage 120 via the second oil cylinder 15, so that the second oil cylinder 15 is sleeved on the outside of the first oil cylinder 14, which can effectively integrate the recovery oil passage 120 and the compression oil passage 110 at the end of the damping device connected to the vehicle body, further reducing the unsprung mass.

[0061] In the embodiment, as shown in FIGS. 3-5, the full-active air suspension can further include a compression valve 111 and a recovery valve 121. The compression oil passage communicates with the first oil cylinder 14 via the compression valve 111, and the recovery oil passage 120 communicates with the second oil cylinder 15 via the recovery valve 121, so as to control the compression oil passage 110 and the recovery oil passage 120.

[0062] In the embodiment, as shown in FIGS. 2-5, the compression valve 111 and the recovery valve 121 are arranged on the valve seat body 13, further improving the integration of the valve seat assembly 1, and further reducing the unsprung mass of the suspension. The valve seat body 13 can be provided with a first installation groove 1111 and a second installation groove 1211 extending in the first direction F1, wherein the first installation groove 1111 is used to arrange the compression valve 111, and the second installation groove 1211 is used to arrange the recovery valve 121.

[0063] In the embodiment, as shown in FIG. 2 and FIG. 3, in the first direction F1, both the first installation groove 1111 and the second installation groove 1211 are arranged side by side above the first oil cylinder 14, the bottom of the first installation groove 1111 is provided with a first through hole in communication with the compression cylinder 141, so as to realize the fluid flow in / out of the compression cylinder 141 controlled by the compression valve 111. The bottom of the second installation groove 1211 can be provided with a second through hole, the gap between the first oil cylinder 14 and the second oil cylinder 15 is in communication with the second installation groove 1211 via the second through hole, so as to realize the fluid flow in / out of the recovery cylinder 142 controlled by the recovery valve 121.

[0064] In the embodiment, as shown in FIG. 2 to FIG. 5, the side of both the first installation groove 1111 and the second installation groove 1211 in the first direction F1, which is opposite to the piston 5, is open, so as to facilitate the electrical wiring connection of the compression valve 111 and the recovery valve 121. It should be noted that the wiring herein can be understood as the control wiring, electrical connection wiring, etc. of the compression valve 111 and the recovery valve 121.

[0065] In the embodiment, both the compression valve 111 and the recovery valve 121 can be solenoid valves. In the embodiment, the compression valve 111 and the recovery valve 121 can be respectively provided with a damping adjusting valve, so as to effectively reduce or eliminate the vibration of the damping device caused by the pressure change of the compression circuit and the recovery circuit.

[0066] However, it is not limited thereto, as long as the compression valve 111 and the recovery valve 121 can realize the control of the compression circuit and the recovery circuit, the compression valve 111 and the recovery valve 121 can also be other valve structures.

[0067] In the embodiment, as shown in FIG. 6, the compression valve 111, the recovery valve 121, the first pressure sensor 171 and the second pressure sensor 172 can be in communication connection with the electronic control system (for example, the driving computer) of the vehicle, so as to realize the real-time monitoring and adjustment of the damping state of the damping device by the full active air suspension.

[0068] In the embodiment, the fluid arranged in both the compression circuit and the recovery circuit can be hydraulic oil, so as to facilitate the pressure regulation of the compression circuit and the recovery circuit of the full active air suspension.

[0069] In the embodiment, as shown in FIG. 4 and FIG. 5, the valve seat assembly 1 can further include a plug 16, and the end of both the first oil cylinder 14 and the second oil cylinder 15 close to the cantilever can be sealed from the outside via the plug 16, so as to ensure the sealing of both the compression oil circuit 110 and the recovery oil circuit 120.

[0070] It should be noted that Fig. 4 is a schematic view of the damping device provided in Fig. 2 along a C-C section, the C-C section being a fold surface formed by a first plane and a second plane, the first plane being a plane determined by the first direction and the second direction and passing through the center line of the compression oil passage, and the second plane being a plane determined by the first direction and the second direction and passing through the center line of the compression valve, Fig. 5 is a schematic view of the damping device provided in Fig. 2 along a D-D section, the D-D section being a fold surface formed by a third plane and a fourth plane, the third plane being a plane determined by the first direction and the second direction and passing through the center line of the recovery oil passage, and the fourth plane being a plane determined by the first direction and the second direction and passing through the center line of the compression valve, so as to show the complete structure of the compression oil passage and the recovery oil passage, respectively.

[0071] In the embodiment, the recovery cylinder 142 and the second oil cylinder 15 can be communicated via the plug portion 16 to ensure the volume of the recovery cylinder 142.

[0072] In the embodiment, the piston rod 52 penetrates the plug portion 16 along the first direction F1 to connect the piston rod 52 with the cantilever, which is not shown in the drawings. In the embodiment, the plug portion 16 can include a plug and an elastic gasket, the plug being fixedly arranged at the bottom of the first oil cylinder 14 and the second oil cylinder 15 to block the first oil cylinder 14 and the second oil cylinder 15. The plug can be uniformly provided with flow channels for communicating the first oil cylinder 14 and the second oil cylinder 15 along the circumference of the piston rod 52 to realize the communication between the recovery cylinder 142 and the second oil cylinder 15. The elastic gasket can be arranged in a through hole of the plug for penetrating the piston rod 52 and between the piston rod 52 and the plug to ensure the sliding property of the piston while effectively preventing the fluid in the recovery cylinder 142 from flowing out of the through hole to improve the sealing property of the recovery cylinder 142.

[0073] In the embodiment, as shown in Figs. 4 to 6, the full-active air suspension can further include a bidirectional hydraulic pump, the compression oil passage 110 and the recovery oil passage 120 being connected with the bidirectional hydraulic pump to provide the compression oil passage 110 and the recovery oil passage 120 with fluid flow power to realize the full-active control of the suspension. The use of the bidirectional hydraulic pump can effectively improve the integration of the full-active air suspension and further reduce the volume of the full-active air suspension. It should be noted that the bidirectional hydraulic pump can also be other pump structures as long as it can provide the compression oil passage 110 and the recovery oil passage 120 with hydraulic adjustment power.

[0074] In the embodiment, as shown in FIG. 2 and FIG. 6, the full active air suspension can further include a first pressure sensor 171, which can be arranged in the compression oil circuit 110 and used to detect the pressure in the compression oil circuit 110. In the embodiment, the full active air suspension can further include a second pressure sensor 172, which can be arranged in the recovery oil circuit 120 and used to detect the pressure in the recovery oil circuit 120. In this way, through the real-time monitoring of the first pressure sensor 171 and the second pressure sensor 172, the hydraulic changes in the compression oil circuit 110 and the recovery oil circuit 120 can be obtained in real time, and the active and accurate control of the damping device by the full active air suspension can be realized.

[0075] In the embodiment, as shown in FIG. 2, the valve seat body 13 can be provided with a first branch 1101 and a second branch 1102, both of which are in communication with the compression circuit. The first branch 1101 can extend in the first direction F1 so that the first branch 1101 forms a first interface at the end of the valve seat body 13 in the first direction F1. The second branch 1102 can extend in the second direction F2 so as to form a second interface on the side wall of the valve seat body 13 in the second direction F2.

[0076] In the embodiment, as shown in FIG. 2, the valve seat body 13 can be provided with a third branch 1201 and a fourth branch 1202, both of which are in communication with the recovery circuit. The third branch 1201 can extend in the first direction F1 so that the third branch 1201 forms a third interface at the end of the valve seat body 13 in the first direction F1. The fourth branch 1202 can extend in the second direction F2 so as to form a fourth interface on the side wall of the valve seat body 13 in the second direction F2.

[0077] In the embodiment, as shown in FIG. 4 and FIG. 5, the bidirectional hydraulic pump can be arranged on one side of the valve seat body 13 in the second direction F2. Correspondingly, as shown in FIG. 2, one end of the valve seat body 13 in the second direction F2 is provided with a pump interface 131, and the second interface and the fourth interface can be exposed by the pump interface 131, so that the bidirectional hydraulic pump is connected with the compression circuit and the recovery circuit through the second interface and the fourth interface respectively. Correspondingly, the first interface and the second interface can be used for the arrangement of the first pressure sensor 171 and the second pressure sensor 172 respectively.

[0078] In the embodiment, the first interface and the second interface are of the same size, in other words, the bidirectional hydraulic pump and the first pressure sensor 171 can be connected to the first interface and the second interface, so that when the bidirectional hydraulic pump of some vehicle models cannot be conveniently arranged on the side of the valve seat body 13, the positions of the first pressure sensor 171 and the bidirectional hydraulic pump can be adjusted (i.e., the first interface is connected to the bidirectional hydraulic pump, and the second interface is connected to the first pressure sensor 171) to realize the assembly of the damping device, so as to improve the adaptability of the damping device.

[0079] In the embodiment, the third interface and the fourth interface are of the same size, in other words, the bidirectional hydraulic pump and the second pressure sensor 172 can be connected to the third interface and the fourth interface, so that when the bidirectional hydraulic pump of some vehicle models cannot be conveniently arranged on the side of the valve seat body 13, the positions of the second pressure sensor 172 and the bidirectional hydraulic pump can be adjusted (i.e., the third interface is connected to the bidirectional hydraulic pump, and the fourth interface is connected to the second pressure sensor 172) to realize the assembly of the damping device, so as to improve the adaptability of the damping device.

[0080] In the embodiment, as shown in FIGS. 1-6, the full-active air suspension can further include a first accumulator 112 and a second accumulator 122, wherein the first accumulator 112 is arranged on the compression oil path 110 for energy storage of the compression oil path 110, and the second accumulator 122 is arranged on the recovery oil path 120 for energy storage of the recovery oil path 120, so as to store the excess hydraulic energy of the compression oil path 110 and the recovery oil path 120 respectively, thereby reducing the energy consumed by the full-active air suspension in the process of actively controlling the damping state of the damping device, and improving the energy utilization rate of the full-active air suspension.

[0081] In the embodiment, as shown in FIGS. 1-5, the valve seat assembly 1 can further include an energy storage mounting box 10 fixedly connected with the valve seat body 13, and the first accumulator 112 and the second accumulator 122 are arranged in the energy storage mounting box 10, so that the first accumulator 112 and the second accumulator 122 are integrated on the side of the damping device close to the vehicle body, thereby further reducing the unsprung mass of the full-active air suspension.

[0082] In the embodiment, as shown in FIG. 2, the energy storage installation box 10 and the pump interface 131 are oppositely arranged along the second direction F2, in other words, the compression circuit and the second branch 1102 both extend along the second direction F2, and the compression circuit and the second branch 1102 are oppositely arranged along the second direction F2, so that the hydraulic energy in the compression circuit can be directly stored in the first accumulator 112, effectively reducing the energy loss caused by the fluid impacting the turning of the compression circuit or the second branch 1102 and the vibration of the valve seat body 13. Correspondingly, the recovery circuit and the fourth branch 1202 both extend along the second direction F2, and the recovery circuit and the fourth branch 1202 are oppositely arranged along the second direction F2, so that the hydraulic energy in the recovery circuit can be directly stored in the second accumulator 122, effectively reducing the energy loss caused by the fluid impacting the turning of the recovery circuit or the fourth branch 1202 and the vibration of the valve seat body 13.

[0083] Further, as shown in FIG. 2, the compression circuit and the second branch 1102 can be communicated through the first installation groove 1111, and correspondingly, the recovery circuit and the fourth branch 1202 can be communicated through the second installation groove 1211.

[0084] In the embodiment, as shown in FIGS. 3-5, the damping device can further include an upper top seat 2, and the valve seat assembly 1 is fixed to the vehicle body through the upper top seat 2.

[0085] In the embodiment, as shown in FIGS. 3-5, the upper top seat 2 covers the outer side of the valve seat body 13 to protect the valve seat body 13.

[0086] In the embodiment, as shown in FIGS. 3-5, the damping device can further include a piston outer cylinder 4, which includes a first end and a second end opposite to each other in the first direction F1. For example, in the orientation shown in the drawings, the first end of the piston outer cylinder 4 is the upper end (i.e., the end of the damping device close to the vehicle body), and the second end of the piston outer cylinder 4 is the lower end (i.e., the end of the damping device close to the suspension arm). The upper end of the piston outer cylinder 4 can cover the outer side of the second oil cylinder 15 to protect the structures of the first oil cylinder 14 and the second oil cylinder 15. The piston rod 52 can be arranged in the piston outer cylinder 4, and the second end of the piston rod 52 is fixedly connected to the lower end of the piston outer cylinder 4, so that the piston outer cylinder 4 can move with the movement of the piston rod 52 to ensure the completeness of the protection of the piston rod 52 by the piston outer cylinder 4.

[0087] In the embodiment, as shown in FIG. 4 and FIG. 5, the damping device can further include a bushing 42, which can be arranged on the inner side of the lower end of the piston outer cylinder 4, and the piston cover is fixedly connected with the piston outer cylinder 4 via the bushing 42, so as to ensure the air tightness of the pneumatic space surrounded by the second oil cylinder 15, the capsule skin 3 and the piston outer cylinder 4.

[0088] In the embodiment, as shown in FIG. 4 and FIG. 5, the damping device can further include a buffer part 41, which can be arranged between the piston outer cylinder 4 and the piston part 5, and extend a predetermined distance from the bushing 42 to the first oil cylinder 14 along the first direction F1, so that when the damping device is compressed, the second end of the piston rod 52 can be effectively prevented from rigidly colliding with the lower ends of the first oil cylinder 14 and the second oil cylinder 15, and the risk of damaging the first oil cylinder 14 and the second oil cylinder 15 is reduced.

[0089] In the embodiment, the buffer part 41 can be an elastic sealing element, which can ensure the buffering performance and improve the sealing performance of the lower end of the piston outer cylinder 4, such as a rubber element, a silica gel element, etc.

[0090] In the embodiment, as shown in FIG. 1, FIG. 3 to FIG. 5, the damping device can further include a capsule skin 3, which is sleeved on the outer side of the second oil cylinder 15, and the capsule skin 3 is connected with the lower end of the upper top seat 2 and the upper end of the piston outer cylinder 4, so that the piston outer cylinder 4 is movably connected with the upper top seat 2.

[0091] In the embodiment, as shown in FIG. 3 to FIG. 5, the damping device can further include a cylinder protection part, which is sleeved on the outer side of the capsule skin 3, and on one hand, the cylinder protection part can protect the capsule skin 3 and reduce the wear of the capsule skin 3 during use; on the other hand, when the damping device is in a working state, the cylinder protection part can control the deformation of the capsule skin 3, so as to control the change of the air pressure in the pneumatic space surrounded by the second oil cylinder 15, the capsule skin 3 and the piston outer cylinder 4, and thus the passive regulation of the damping state of the full-active air suspension is realized.

[0092] In the embodiment, as shown in FIG. 5, the damping device can further include a hoop ring 21, and the capsule skin 3 can be sleeved on the lower end of the upper top seat 2 via the hoop ring 21. In the embodiment, the capsule skin 3 can also be sleeved on the outer side of the piston outer cylinder 4 via the hoop ring 21. In the embodiment, the capsule skin 3 can also be supported and fixed in the cylinder protection sleeve 31 from the inner side of the cylinder protection sleeve 31 via the hoop ring 21.

[0093] Based on the above-described features, taking the full-active air suspension shown in FIG. 1 to FIG. 6 as an example for description, the full-active air suspension provided in the application has the following beneficial effects compared with the related art:

[0094] (1) The full active air suspension of the present application has low suspension stiffness requirement. The full active air suspension of the present application transfers the accessory mass (for example, valve seat body 13, first accumulator 112, second accumulator 122, compression valve 111, and recovery valve 121) of the damping device to the sprung mass, greatly reducing the unsprung mass of the damping device, and further reducing the body vibration frequency, ensuring the ride comfort during normal driving, and greatly improving the ride comfort of the vehicle.

[0095] (2) The active suspension system is adopted, so that the suspension can take into account the ride comfort, handling stability and acceleration performance of the vehicle. Specifically, the comfort: the unsprung mass is reduced, when the wheels encounter road irregularities, the vibration and impact generated by the damping device is reduced, and the ride comfort is improved; the handling: the reduction of the unsprung mass effectively shortens the suspension reaction time and the vibration absorption time when the vehicle encounters uneven road surface, and further improves the handling of the vehicle; the acceleration performance, the smaller the unsprung mass, the lighter the wheel, the less energy required from static to start rolling, and the acceleration performance of the vehicle is improved.

[0096] (3) The active control of the full active air suspension can make the vehicle avoid obstacles and travel when encountering complex road surfaces, and further improve the passability of the vehicle.

[0097] (4) The damping device is inverted, so that part of the installation space of the shock absorber hydraulic cylinder is converted into the volume of the air spring, and the volume of the air spring of the damping device can be arranged larger, and the increase of the volume can reduce the maximum working pressure of the air spring and prolong the service life of the air spring.

[0098] Other embodiments of the present application also provide a vehicle comprising the vehicle body and the full active air suspension of any of the embodiments, so that the vehicle has all the beneficial technical effects of the full active air suspension, which will not be described here.

[0099] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A fully active air suspension, characterized by, The suspension device comprises a suspension arm and a damping device connected with the suspension arm, the damping device comprises a valve seat assembly and a piston part, the valve seat assembly is connected with the vehicle body, the piston part comprises a first end and a second end opposite to each other in a first direction, the valve seat assembly comprises a first oil cylinder extending in the first direction, the first end of the piston part is arranged in the first oil cylinder to divide the first oil cylinder into a compression cylinder and a recovery cylinder, and the first end of the piston part can slide in the first oil cylinder in the first direction, and the second end of the piston part is connected with the suspension arm.

2. The fully active air suspension of claim 1, wherein, The valve seat assembly further comprises a second oil cylinder and a valve seat body, the second oil cylinder is sleeved outside the first oil cylinder and communicates with the recovery cylinder; The ends of the first oil cylinder and the second oil cylinder away from the suspension arm are connected with the valve seat body; The valve seat body is provided with a compression oil passage and a recovery oil passage, the compression oil passage communicates with the compression cylinder through the valve seat body, and the recovery oil passage communicates with the recovery cylinder through the valve seat body and the second oil cylinder in sequence.

3. The fully active air suspension of claim 2, wherein, The valve seat assembly further comprises a plug part, the ends of the first oil cylinder and the second oil cylinder close to the suspension arm are sealed from the outside through the plug part; The recovery cylinder and the second oil cylinder communicate through the plug part; The piston part penetrates through the plug part in the first direction.

4. The fully active air suspension of claim 2, wherein, Further comprising: A bidirectional hydraulic pump, the compression oil passage and the recovery oil passage are connected with the bidirectional hydraulic pump respectively; A compression valve arranged in the valve seat body, the compression oil passage communicates with the first oil cylinder through the compression valve; A recovery valve arranged in the valve seat body, the recovery oil passage communicates with the second oil cylinder through the recovery valve; A first accumulator arranged in the compression oil passage for energy storage of the compression oil passage; A second accumulator arranged in the recovery oil passage for energy storage of the recovery oil passage.

5. The fully active air suspension of claim 4, wherein, The valve seat assembly further comprises an energy storage mounting box, the energy storage mounting box is fixedly connected with the valve seat body, and the first accumulator and the second accumulator are arranged in the energy storage mounting box.

6. The fully active air suspension of claim 4, wherein, Further comprising: A first pressure sensor arranged in the compression oil passage for detecting the pressure in the compression oil passage; A second pressure sensor arranged in the recovery oil passage for detecting the pressure in the recovery oil passage.

7. The fully active air suspension according to claim 6, wherein The compression oil passage is provided with a first interface and a second interface, the first interface is arranged at the end of the valve seat body in the first direction, and the second interface is arranged at the side wall of the valve seat body, and the bidirectional hydraulic pump and the first pressure sensor can be docked with the first interface and the second interface; And / or, the recovery oil passage is provided with a third interface and a fourth interface, the third interface is arranged at the end of the valve seat body in the first direction, and the fourth interface is arranged at the side wall of the valve seat body, and the bidirectional hydraulic pump and the second pressure sensor can be docked with the third interface and the fourth interface.

8. The fully active air suspension of any one of claims 2 to 7, wherein, The damping device further comprises: An upper head, the valve seat assembly is fixed to the vehicle body via the upper head; A capsule skin, sleeved on the outside of the second oil cylinder, and one end of the capsule skin is clamped on the upper head; A piston outer cylinder, the other end of the capsule skin is clamped on one end of the piston outer cylinder close to the valve seat assembly in the first direction, and the second end of the piston part is connected with the other end of the piston outer cylinder.

9. The fully active air suspension of claim 8, wherein, The damping device further comprises: A protection cylinder part, clamped on the outside of the capsule skin; A bushing, arranged on the end of the piston outer cylinder away from the valve seat assembly, and the piston part is connected with the piston outer cylinder via the bushing; A buffer part, arranged between the piston outer cylinder and the piston part, and extending a predetermined distance from the bushing to the first oil cylinder along the first direction.

10. An automobile characterized by comprising: An all-active air suspension comprising a vehicle body and the all-active air suspension of any one of claims 1 to 9.

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