Hydraulic lifting suspension system and vehicle

Abstract

The invention provides a hydraulic lifting suspension system and a vehicle, the hydraulic lifting suspension system comprises a shock absorber, a hydraulic oil tank and a control valve assembly, a hydraulic pump is arranged in the hydraulic oil tank, and the control valve assembly is connected with the hydraulic oil tank, the hydraulic pump and a recovery cavity and a compression cavity of the shock absorber; the control valve assembly comprises a third reversing valve connected between two shock absorbers located on the same axle. By switching the conduction state of each control valve included in the control valve assembly and the working state of the hydraulic pump, the communication mode among the hydraulic oil tank, the hydraulic pump, a recovery cavity included in the shock absorber and a compression cavity included in the shock absorber is adjusted. The communication modes of the hydraulic oil tank, the hydraulic pump and the recovery cavities and the compression cavities of the shock absorbers and the communication modes of the recovery cavities and the compression cavities corresponding to the two shock absorbers located on the same axle can be switched, so that the vehicle can have various characteristics.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and in particular to a hydraulic lifting suspension system and vehicle. Background Technology

[0002] As a crucial system connecting the vehicle body and wheels, the suspension plays a vital role in improving ride comfort and maintaining vehicle posture. Among its key performance indicators, ride comfort, roll resistance, grip, and off-road capability are paramount. Traditional passive suspensions often exhibit these characteristics inversely, making it impossible to simultaneously possess all four. For instance, roll resistance and ride comfort are often compromises in passive suspensions. To enable vehicles to achieve both roll resistance and ride comfort, hydraulic lift suspensions can be used. By altering the hydraulic circuit connections between the compression and recovery chambers of the shock absorbers, the balance between roll resistance and ride comfort can be achieved. However, hydraulic lift suspensions, due to their superior mud and sand resistance compared to air springs, are primarily used in off-road vehicles. Grip under off-road conditions is also a critical factor for hydraulic suspensions. Furthermore, after-sales maintenance of hydraulic suspensions requires oiling and bleeding the system, making subsequent maintenance significantly more difficult. Summary of the Invention

[0003] This application provides a hydraulic lifting suspension system and vehicle to address the problem of how to make a hydraulic lifting suspension possess multiple characteristics.

[0004] In a first aspect, embodiments of this application provide a hydraulic lifting suspension system, including:

[0005] The vibration damper includes a recovery chamber and a compression chamber;

[0006] A hydraulic oil tank, wherein a hydraulic pump is installed inside the hydraulic oil tank;

[0007] A control valve assembly, which is connected to the hydraulic oil tank, the hydraulic pump, and the shock absorber including the recovery chamber and the compression chamber;

[0008] The control valve assembly includes a third reversing valve connected between two shock absorbers located on the same axle. The third reversing valve is used to adjust the conduction mode between the recovery chamber and the compression chamber corresponding to the two shock absorbers, respectively.

[0009] Specifically, by switching the conduction state of each control valve in the control valve assembly and the working state of the hydraulic pump, the communication mode between the hydraulic oil tank, the hydraulic pump, and the recovery chamber and compression chamber of the shock absorber is adjusted.

[0010] Furthermore, the control valve assembly includes a directional valve group and a switching valve;

[0011] The reversing valve group corresponds one-to-one with the shock absorber group, and the shock absorber group includes two shock absorbers mounted on the same axle.

[0012] The first port of the switching valve is connected to the hydraulic oil tank, and the second port of the switching valve is connected to the reversing valve group;

[0013] The reversing valve assembly is also connected to the hydraulic pump and each of the dampers in the damper assembly.

[0014] Furthermore, the reversing valve assembly includes a first reversing valve, a second reversing valve, the third reversing valve, and a fourth reversing valve;

[0015] The vibration damper group includes a first vibration damper and a second vibration damper, wherein the energy storage unit corresponding to the first vibration damper is connected to the compression chamber, and the energy storage unit corresponding to the second vibration damper is connected to the compression chamber and the recovery chamber through the fourth reversing valve.

[0016] The first reversing valve and the second reversing valve are used to control whether the hydraulic pump is simultaneously connected to the first shock absorber and the second shock absorber, and whether the hydraulic oil tank is simultaneously connected to the first shock absorber and the second shock absorber.

[0017] The third reversing valve is used to control the communication between the four sub-oil chambers of the damper assembly, wherein the four sub-oil chambers are the recovery chamber and compression chamber of the first damper and the recovery chamber and compression chamber of the second damper, respectively.

[0018] The fourth reversing valve is used to control the connection between the energy storage unit, compression chamber and recovery chamber corresponding to the second damper.

[0019] Furthermore, the first port of the first reversing valve is connected to the compression chamber corresponding to the first shock absorber, the second port of the first reversing valve is connected to the second port of the hydraulic pump, the third port of the first reversing valve is connected to the recovery chamber corresponding to the second shock absorber, and the fourth port of the first reversing valve is connected to the second port of the switching valve.

[0020] The first directional valve includes a first open state, a second open state, and a third open state;

[0021] When the first directional valve is in the first open state, the first port and the fourth port of the first directional valve are connected, and the second port and the third port are connected.

[0022] When the first directional valve is in the second open state, the first port, second port, third port and fourth port of the first directional valve are not connected to each other;

[0023] When the first directional valve is in the third conducting state, the first and second ports of the first directional valve are connected, and the third and fourth ports are connected.

[0024] Furthermore, the first port of the second reversing valve is connected to the compression chamber corresponding to the first shock absorber, and the second port of the second reversing valve is connected to the recovery chamber corresponding to the second shock absorber.

[0025] The second directional valve includes a first open state and a second open state;

[0026] When the second directional valve is in the first open state, the first port and the second port of the second directional valve are connected.

[0027] When the second directional valve is in the second open state, the first port and the second port of the second directional valve are not connected.

[0028] Furthermore, the first port of the third reversing valve is connected to the recovery chamber corresponding to the first shock absorber, the second port of the third reversing valve is connected to the compression chamber corresponding to the first shock absorber, the third port of the third reversing valve is connected to the recovery chamber corresponding to the second shock absorber, and the fourth port of the third reversing valve is connected to the compression chamber corresponding to the second shock absorber.

[0029] The third directional valve includes a first open state, a second open state, and a third open state;

[0030] When the third directional valve is in the first open state, the first port and the fourth port of the third directional valve are connected, and the second port and the third port are connected.

[0031] When the third directional valve is in the second open state, the first and second ports of the third directional valve are connected, and the third and fourth ports are connected.

[0032] When the third directional valve is in the third open state, the first port and the third port of the third directional valve are connected, and the second port and the fourth port are connected.

[0033] Furthermore, the first port of the fourth reversing valve is connected to the energy storage unit corresponding to the second vibration damper, the second port of the fourth reversing valve is connected to the recovery chamber corresponding to the second vibration damper, and the third port of the fourth reversing valve is connected to the compression chamber corresponding to the second vibration damper.

[0034] The fourth directional valve includes a first open state and a second open state;

[0035] When the fourth directional valve is in the first open state, the first port and the second port of the fourth directional valve are connected.

[0036] When the fourth directional valve is in the second open state, the first port and the third port of the fourth directional valve are connected.

[0037] Furthermore, when the vehicle is in normal driving conditions, the hydraulic pump is in the off state, the first reversing valve is in the second open state, the second reversing valve is in the second open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the off state.

[0038] When the vehicle is in anti-roll operation, the hydraulic pump is in the off state, the first reversing valve is in the second open state, the second reversing valve is in the second open state, the third reversing valve is in the first open state, the fourth reversing valve is in the second open state, and the switching valve is in the off state.

[0039] When the vehicle is in a high grip condition, the hydraulic pump is in the off state, the first reversing valve is in the second open state, the second reversing valve is in the second open state, the third reversing valve is in the third open state, the fourth reversing valve is in the first open state, and the switching valve is in the off state.

[0040] When the vehicle is in a simultaneous lifting condition, the hydraulic pump is in the start state, the first reversing valve is in the first open state, the second reversing valve is in the first open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the open state.

[0041] When the vehicle is in the left-side lifting condition, the hydraulic pump is in the start state, the first reversing valve is in the first open state, the second reversing valve is in the second open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the open state.

[0042] When the vehicle is in the right-side lifting condition, the hydraulic pump is in the start state, the first reversing valve is in the second open state, the second reversing valve is in the second open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the open state.

[0043] When the vehicle is in a simultaneous descent condition, the hydraulic pump is in the off state, the first reversing valve is in the third open state, the second reversing valve is in the first open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the open state.

[0044] When the vehicle is in the right-side descent mode, the hydraulic pump is in the off state, the first reversing valve is in the third open state, the second reversing valve is in the second open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the open state.

[0045] When the vehicle is in the left-side descent mode, the hydraulic pump is in the off state, the first reversing valve is in the first open state, the second reversing valve is in the second open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the open state.

[0046] When the vehicle is in exhaust mode, the hydraulic pump is in the start state, the first reversing valve alternately enters the first and third open states, the second reversing valve enters the second open state, the third reversing valve enters the third open state, the fourth reversing valve enters the second open state, and the switching valve is in the open state.

[0047] Secondly, embodiments of this application also provide a vehicle including the aforementioned hydraulic lifting suspension system.

[0048] The embodiments of this application include at least the following technical effects:

[0049] The technical solution of this application embodiment, by setting a control valve assembly between the hydraulic oil tank, the hydraulic pump, and the oil chamber and energy storage unit of the shock absorber, can switch the connection mode between the hydraulic oil tank, the hydraulic pump, and the recovery chamber and compression chamber of the shock absorber by switching the conduction state of each control valve in the control valve assembly and the working state of the hydraulic pump. In particular, by adjusting the conduction state of the third reversing valve, the connection mode between the recovery chamber and compression chamber of two shock absorbers located on the same axle can also be switched, thereby realizing the switching of the hydraulic suspension working mode, making the vehicle suitable for various vehicle working conditions, and possessing multiple characteristics, thus improving the user experience. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0051] Figure 1 This is one of the structural schematic diagrams of the hydraulic lifting suspension system provided in the embodiments of this application;

[0052] Figure 2 This is the second structural schematic diagram of the hydraulic lifting suspension system provided in the embodiments of this application.

[0053] Figure 3 This is a schematic diagram of the first working mode;

[0054] Figure 4 This is a schematic diagram of the second working mode;

[0055] Figure 5 This is a schematic diagram of the third working mode;

[0056] Figure 6 This is a structural diagram of the fourth working mode;

[0057] Figure 7 This is a structural diagram of the fifth working mode;

[0058] Figure 8 This is a structural diagram of the sixth working mode;

[0059] Figure 9 This is a schematic diagram of the seventh working mode;

[0060] Figure 10 This is a schematic diagram of the eighth working mode;

[0061] Figure 11 This is a structural diagram of the ninth working mode.

[0062] Figure 12 This is one of the structural diagrams of the tenth working mode;

[0063] Figure 13 This is the second structural diagram of the tenth working mode. Detailed Implementation

[0064] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0065] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0066] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0067] Furthermore, in the description of this application, unless otherwise expressly specified, the connecting structures between mating components can be conventional in the art. Moreover, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0068] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0069] Example 1

[0070] This application provides a hydraulic lifting suspension system, such as... Figure 1 As shown, it includes:

[0071] Vibration damper 100, the vibration damper 100 includes a recovery chamber 101 and a compression chamber 102;

[0072] A hydraulic oil tank 200, wherein a hydraulic pump 300 is installed inside the hydraulic oil tank 200;

[0073] A control valve assembly 400 is connected to the hydraulic oil tank 200, the hydraulic pump 300, and the shock absorber 100, including the recovery chamber 101 and the compression chamber 102.

[0074] The control valve assembly 400 includes a third reversing valve 413 connected between two shock absorbers located on the same axle. The third reversing valve 413 is used to adjust the conduction mode between the recovery chamber and the compression chamber corresponding to the two shock absorbers, respectively.

[0075] Specifically, by switching the conduction state of each control valve included in the control valve assembly 400 and the working state of the hydraulic pump 300, the communication mode between the hydraulic oil tank 200, the hydraulic pump 300, and the recovery chamber 101 and compression chamber 102 included in the shock absorber 100 is adjusted.

[0076] It should be noted that in the embodiments of this application, "connection" and "connection" both refer to connection and connection through pipelines.

[0077] Specifically, shock absorbers are installed between each wheel and the vehicle body, and the number of shock absorbers is the same as the number of wheels. A shock absorber includes an energy storage unit, an oil chamber, a piston rod, and a piston. The piston divides the oil chamber into a recovery chamber and a compression chamber. One end of the piston rod is connected to the piston, and the other end is connected to the suspension control arm; therefore, the recovery chamber is also called the rod-attached chamber, and the compression chamber is also called the rodless chamber.

[0078] The control valve assembly connects the hydraulic oil tank, the hydraulic pump, and the shock absorber's recovery and compression chambers. The control valve assembly includes multiple control valves. By switching the on / off state of each control valve and the operating state of the hydraulic pump, the communication between the hydraulic oil tank, the hydraulic pump, and the shock absorber's recovery and compression chambers can be adjusted. This allows the hydraulic pump to fill the shock absorber's compression or recovery chamber with hydraulic fluid, causing the piston rod within the shock absorber to move upwards or downwards, thereby moving the vehicle's suspension upwards or downwards.

[0079] The control valve assembly includes a third directional valve connected between two shock absorbers located on the same axle. This third directional valve regulates the connection between the recovery chamber and compression chamber of the two shock absorbers on the same axle. The number of third directional valves is the same as the number of axles in the vehicle. A left shock absorber is located at the left wheel of the axle, and a right shock absorber is located at the right wheel. Therefore, each axle corresponds to four sub-chambers: the recovery chamber of the left shock absorber, the compression chamber of the left shock absorber, the recovery chamber of the right shock absorber, and the compression chamber of the right shock absorber.

[0080] In this embodiment, the third directional valve has three conduction states. In the first conduction state, the four sub-chambers are cross-connected, with the left damper's recovery chamber and the right damper's compression chamber connected, and the left damper's compression chamber and the right damper's recovery chamber connected. In the second conduction state, each damper is connected, with the left damper's recovery chamber and compression chamber connected, and the right damper's recovery chamber and compression chamber connected. In the third conduction state, the four sub-chambers are connected in parallel, with the left damper's recovery chamber and the right damper's recovery chamber connected, and the left damper's compression chamber and the right damper's compression chamber connected. By controlling the conduction state of the third directional valve, the conduction mode of these four sub-chambers can be adjusted. This allows for the determination of the required characteristics of the vehicle suspension based on the vehicle's operating conditions, thereby enabling the control of the third directional valve's conduction state and making the vehicle suspension suitable for various operating conditions.

[0081] Specifically, vehicle operating conditions can include normal driving conditions, anti-roll conditions, high-grip conditions, lifting conditions (including front, rear, left, and right sides), lowering conditions (including front, rear, left, and right sides), and exhaust conditions (exhaust conditions are applicable after shock absorber maintenance to expel air from the oil chamber). Under different operating conditions, the vehicle suspension needs different characteristics. Under normal driving conditions, the vehicle needs to have ride comfort; under anti-roll conditions, the vehicle needs to have anti-roll properties; under high-grip conditions, the vehicle needs to have high grip; under lifting conditions, the vehicle needs to complete a lifting operation; under lowering conditions, the vehicle needs to complete a lowering operation; and under exhaust conditions, the vehicle needs to complete an exhaust operation.

[0082] This application embodiment can set a matching suspension operating mode for each vehicle operating condition. The suspension operating mode corresponds one-to-one with the connection method between the hydraulic oil tank, hydraulic pump, and the shock absorber's recovery and compression chambers. After determining the vehicle operating condition, a target suspension operating mode can be determined, followed by a target connection method. By switching the conduction state of each control valve in the control valve assembly and the operating state of the hydraulic pump, the connection method between the hydraulic oil tank, hydraulic pump, and the shock absorber's recovery and compression chambers is switched to the target connection method, allowing the vehicle suspension to adjust its height to meet the vehicle's current operating condition.

[0083] In this embodiment, a control valve assembly is installed between the hydraulic oil tank, the hydraulic pump, and the oil chamber and energy storage unit of the shock absorber. By switching the conduction state of each control valve in the control valve assembly and the working state of the hydraulic pump, the connection mode between the hydraulic oil tank, the hydraulic pump, and the recovery chamber and compression chamber of the shock absorber can be switched. In particular, by adjusting the conduction state of the third directional valve, the connection mode between the recovery chamber and compression chamber of two shock absorbers located on the same axle can also be switched, thereby realizing the switching of the hydraulic suspension working mode. This makes the vehicle suitable for various vehicle working conditions, can have multiple characteristics, and improve the user experience.

[0084] like Figure 2 As shown, the control valve assembly 400 includes a directional valve group 410 and a switching valve 420;

[0085] The reversing valve group 410 corresponds one-to-one with the shock absorber group, and the shock absorber group includes two shock absorbers disposed on the same axle.

[0086] The first port of the switching valve 420 is connected to the hydraulic oil tank 200, and the second port of the switching valve 420 is connected to the reversing valve group 410.

[0087] The reversing valve assembly 410 is also connected to the hydraulic pump 300 and each of the shock absorbers 100 in the shock absorber assembly 500.

[0088] In this embodiment, by setting a switching valve, the connection between the hydraulic oil tank and each shock absorber can be controlled by controlling the conduction state of the switching valve. By setting a reversing valve group, the connection mode between the hydraulic oil tank and the hydraulic pump and each shock absorber can be controlled by controlling the reversing valve group, so as to realize the switching of multiple connection modes between the recovery chamber and compression chamber included in each shock absorber in the shock absorber group and the hydraulic oil tank and hydraulic pump, so that the vehicle suspension can be adapted to various vehicle working conditions.

[0089] Specifically, such as Figure 2 As shown below, the connection method between the two shock absorbers and the directional valve group corresponding to each axle of the vehicle is described.

[0090] The reversing valve group 410 includes a first reversing valve 411, a second reversing valve 412, a third reversing valve 413, and a fourth reversing valve 414.

[0091] The vibration damper group includes a first vibration damper 510 and a second vibration damper 520, wherein the energy storage unit 6 corresponding to the first vibration damper 510 is connected to the compression chamber, and the energy storage unit 6 corresponding to the second vibration damper is connected to the compression chamber and the recovery chamber through the fourth reversing valve 414.

[0092] The first reversing valve 411 and the second reversing valve 412 are used to control whether the hydraulic pump 300 is simultaneously connected to the first damper 510 and the second damper 510, and whether the hydraulic oil tank 200 is simultaneously connected to the first damper 510 and the second damper 510.

[0093] The third reversing valve 413 is used to control the communication mode between the four sub-oil chambers included in the damper group 500, wherein the four sub-oil chambers are the recovery chamber and compression chamber included in the first damper 510 and the recovery chamber and compression chamber included in the second damper 520, respectively.

[0094] The fourth reversing valve 414 is used to control the connection between the six energy storage units, compression chamber and recovery chamber corresponding to the second damper 520.

[0095] In this embodiment, by setting a first reversing valve, a second reversing valve, a third reversing valve, and a fourth reversing valve, the connection mode between the four sub-oil chambers and two energy storage units included in the shock absorber group and the hydraulic pump and hydraulic oil tank is switched, so that the vehicle suspension can have multiple suspension working modes, and thus the vehicle suspension can be suitable for various vehicle working conditions.

[0096] Optionally, a check valve may be provided between the hydraulic pump and the control valve assembly, with the inlet of the check valve connected to the hydraulic pump and the outlet of the check valve connected to the control valve assembly.

[0097] The connection relationships and conduction states of the first, second, third, and fourth directional control valves are described below.

[0098] like Figure 2 As shown, the first port of the first reversing valve 411 is connected to the compression chamber corresponding to the first shock absorber 510, the second port of the first reversing valve 411 is connected to the second port of the hydraulic pump 300, the third port of the first reversing valve 411 is connected to the recovery chamber corresponding to the second shock absorber 520, and the fourth port of the first reversing valve is connected to the second port of the switching valve 420.

[0099] The first directional valve 411 includes a first open state, a second open state, and a third open state;

[0100] When the first directional valve 411 is in the first conducting state, the first port and the fourth port of the first directional valve 411 are connected, and the second port and the third port are connected.

[0101] When the first reversing valve 411 is in the second conducting state, the first port, second port, third port and fourth port of the first reversing valve 411 are not connected to each other;

[0102] When the first directional valve 411 is in the third conducting state, the first port and the second port of the first directional valve 411 are connected, and the third port and the fourth port are connected.

[0103] Specifically, when the first directional valve is energized on the left side, it is in the left position function, i.e., the first conducting state; when it is not energized, it is in the second conducting state; and when it is energized on the right side, it is in the right position function, i.e., the third conducting state.

[0104] like Figure 2 As shown, the first port of the second reversing valve 412 is connected to the compression chamber corresponding to the first damper 510, and the second port of the second reversing valve 412 is connected to the recovery chamber corresponding to the second damper 520.

[0105] The second directional valve 412 includes a first open state and a second open state;

[0106] When the second directional valve 412 is in the first open state, the first port and the second port of the second directional valve 412 are connected.

[0107] When the second directional valve 412 is in the second open state, the first port and the second port of the second directional valve 412 are not connected.

[0108] Specifically, the second directional valve is in the first conducting state when energized, and in the second conducting state when de-energized.

[0109] The first reversing valve and the second reversing valve are used to control whether the hydraulic pump is simultaneously connected to the first shock absorber and the second shock absorber, and whether the hydraulic oil tank is simultaneously connected to the first shock absorber and the second shock absorber.

[0110] Specifically, when the first directional valve is in its first open state and the second directional valve is in its second open state, if the hydraulic pump is operating, it is only connected to the second shock absorber; if the hydraulic tank is connected to the first directional valve, it is only connected to the first shock absorber; if the hydraulic pump is operating and the hydraulic tank is connected to the first directional valve, both the hydraulic pump and the hydraulic tank are simultaneously connected to the first and second shock absorbers. When the first directional valve is in its third open state and the second directional valve is in its first open state, if the hydraulic pump is operating, it is simultaneously connected to both the first and second shock absorbers; if the hydraulic tank is connected to the first directional valve, it is simultaneously connected to both the first and second shock absorbers. When the first directional valve is in the third open state and the second directional valve is in the second open state, if the hydraulic pump is operating, it is only connected to the first shock absorber; if the hydraulic tank is connected to the first directional valve, it is only connected to the second shock absorber; if the hydraulic pump is operating and the hydraulic tank is connected to the first directional valve, both the hydraulic pump and the hydraulic tank are simultaneously connected to the first and second shock absorbers. When the first directional valve is in the second open state, neither the hydraulic pump nor the hydraulic tank is connected to the first or second shock absorber.

[0111] like Figure 2 As shown, the first port of the third reversing valve 413 is connected to the recovery chamber corresponding to the first damper 510, the second port of the third reversing valve 413 is connected to the compression chamber corresponding to the first damper 510, the third port of the third reversing valve 413 is connected to the recovery chamber corresponding to the second damper 520, and the fourth port of the third reversing valve 413 is connected to the compression chamber corresponding to the second damper 520.

[0112] The third directional valve 413 includes a first open state, a second open state, and a third open state;

[0113] When the third directional valve 413 is in the first conducting state, the first port and the fourth port of the third directional valve 413 are connected, and the second port and the third port are connected.

[0114] When the third directional valve 413 is in the second conducting state, the first port and the second port of the third directional valve 413 are connected, and the third port and the fourth port are connected.

[0115] When the third directional valve 413 is in the third open state, the first port and the third port of the third directional valve 413 are connected, and the second port and the fourth port are connected.

[0116] Specifically, when the third directional valve is energized on the left side, it is in the left position function, i.e., the first conducting state; when it is not energized, it is in the second conducting state; and when it is energized on the right side, it is in the right position function, i.e., the third conducting state.

[0117] The third directional valve is used to control the communication between the four sub-chambers of the damper assembly, wherein the four sub-chambers are the recovery chamber and compression chamber of the first damper and the recovery chamber and compression chamber of the second damper, respectively. The communication between these four sub-chambers includes individual connection, parallel connection, and cross connection. When the third directional valve is in the first open state, the four sub-chambers are cross-connected, with the recovery chamber of the first damper and the compression chamber of the second damper connected, and the compression chamber of the first damper and the recovery chamber of the second damper connected. When the third directional valve is in the second open state, the two dampers are individually connected, with the recovery chamber and compression chamber of the first damper connected, and the recovery chamber and compression chamber of the second damper connected. When the third directional valve is in the third open state, the four sub-chambers are parallel connected, with the recovery chamber and the recovery chamber of the first damper connected, and the compression chamber of the first damper and the compression chamber of the second damper connected.

[0118] like Figure 2 As shown, the first port of the fourth reversing valve 414 is connected to the energy storage unit corresponding to the second vibration damper 520, the second port of the fourth reversing valve 414 is connected to the recovery chamber corresponding to the second vibration damper 520, and the third port of the fourth reversing valve 414 is connected to the compression chamber corresponding to the second vibration damper.

[0119] The fourth directional valve 414 includes a first open state and a second open state.

[0120] When the fourth directional valve 414 is in the first conducting state, the first port and the second port of the fourth directional valve are connected.

[0121] When the fourth directional valve 414 is in the second open state, the first port and the third port of the fourth directional valve are connected.

[0122] Specifically, the fourth directional valve is in the first conducting state when energized and in the second conducting state when de-energized.

[0123] The fourth directional valve is used to control the connection between the energy storage unit, compression chamber, and recovery chamber corresponding to the second damper. When the fourth directional valve is in the first open state, the energy storage unit is connected to the recovery chamber; when the fourth directional valve is in the first open state, the energy storage unit is connected to the compression chamber.

[0124] Specifically, this application embodiment sets a matching suspension operating mode for each vehicle operating condition. The connection method between the hydraulic oil tank, hydraulic pump, and the recovery chamber and compression chamber of the shock absorber corresponds one-to-one with the suspension operating mode.

[0125] The following will describe the conduction state of each control valve in the control valve assembly and the working state of the hydraulic pump in each suspension working mode of the hydraulic lifting suspension system provided in this application embodiment. It should be noted that since the reversing valve group and shock absorber group corresponding to each axle of the vehicle operate on the same principle, only the reversing valve group and shock absorber group corresponding to one axle are shown below; the other axles are the same. It should be noted that in... Figures 3 to 13 The thick lines in the diagram represent interconnected systems, specifically the hydraulic oil flow lines.

[0126] When the vehicle is under normal driving conditions, the suspension operates in the first mode. At this time, if... Figure 3 As shown, the hydraulic pump 300 is in the off state, the first directional valve 411 is in the second open state, the second directional valve 412 is in the second open state, the third directional valve 413 is in the second open state, the fourth directional valve 414 is in the second open state, and the switching valve 420 is in the off state. The energy storage unit, the recovery chamber, and the compression chamber in the first shock absorber are connected, and the energy storage unit, the recovery chamber, and the compression chamber in the second shock absorber are connected but isolated from the hydraulic oil tank and the hydraulic pump.

[0127] When the vehicle is in anti-roll operation mode, the suspension operates in the second mode. At this time, if... Figure 4 As shown, the hydraulic pump 300 is in the off state, the first directional valve 411 is in the second open state, the second directional valve 412 is in the second open state, the third directional valve 413 is in the first open state, the fourth directional valve 414 is in the second open state, and the switching valve 420 is in the off state. The first and second vibration dampers are cross-connected, that is, the recovery chamber of the first vibration damper, the compression chamber of the second vibration damper, and the energy storage unit of the first vibration damper are connected, and the recovery chamber of the second vibration damper, the compression chamber of the first vibration damper, and the energy storage unit of the second vibration damper are connected, and are isolated from the hydraulic oil tank and the hydraulic pump.

[0128] When the vehicle is in a high-grip condition, the suspension operates in the third mode. At this time, if... Figure 5 As shown, the hydraulic pump 300 is in the off state, the first directional valve 411 is in the second open state, the second directional valve 412 is in the second open state, the third directional valve 413 is in the third open state, the fourth directional valve 414 is in the first open state, and the switching valve 420 is in the off state. The upper and lower chambers of the first and second vibration dampers are connected in parallel, that is, the recovery chamber of the first vibration damper, the recovery chamber of the second vibration damper, and the energy storage unit of the second vibration damper are connected, and the compression chamber of the first vibration damper, the compression chamber of the second vibration damper, and the energy storage unit of the first vibration damper are connected, and are isolated from the hydraulic oil tank and the hydraulic pump.

[0129] When the vehicle is in a simultaneous lifting condition, the suspension operates in the fourth mode. At this time, if... Figure 6 As shown, the hydraulic pump 300 is in the start state, the first directional valve 411 is in the first open state, the second directional valve 412 is in the first open state, the third directional valve 413 is in the second open state, the fourth directional valve 414 is in the second open state, and the switching valve 420 is in the open state. The first shock absorber, the second shock absorber, and the hydraulic pump are interconnected, that is, the energy storage unit, the recovery chamber, and the compression chamber of the first shock absorber, and the energy storage unit, the recovery chamber, and the compression chamber of the second shock absorber, and the hydraulic pump are interconnected.

[0130] When the vehicle is in a left-side lifting position, the suspension operates in the fifth mode. At this time, if... Figure 7 As shown, the hydraulic pump 300 is in the start state, the first directional valve 411 is in the first open state, the second directional valve 412 is in the second open state, the third directional valve is in the second open state, the fourth directional valve 414 is in the second open state, and the switching valve 420 is in the open state. The first shock absorber is interconnected with the hydraulic pump, that is, the energy storage unit, the recovery chamber, and the compression chamber of the first shock absorber are interconnected with the hydraulic pump. The energy storage unit, the recovery chamber, and the compression chamber of the second shock absorber are interconnected.

[0131] When the vehicle is in a right-side lifting position, the suspension operates in the sixth mode. At this time, if... Figure 8 As shown, the hydraulic pump 300 is in the start state, the first directional valve 411 is in the second open state, the second directional valve 412 is in the second open state, the third directional valve 413 is in the second open state, the fourth directional valve 414 is in the second open state, and the switching valve 420 is in the open state. The second shock absorber is interconnected with the hydraulic pump, that is, the energy storage unit, the recovery chamber, and the compression chamber of the second shock absorber are interconnected with the hydraulic pump. The energy storage unit, the recovery chamber, and the compression chamber of the first shock absorber are interconnected.

[0132] When the vehicle is in a simultaneous descent condition, the suspension operates in the seventh mode. At this time, if... Figure 9 As shown, the hydraulic pump 300 is in the off state, the first directional valve 411 is in the third open state, the second directional valve 412 is in the first open state, the third directional valve 413 is in the second open state, the fourth directional valve 414 is in the second open state, and the switching valve 420 is in the open state. The first shock absorber, the second shock absorber, and the hydraulic oil tank are interconnected; that is, the energy storage unit, the recovery chamber, and the compression chamber of the first shock absorber, as well as the energy storage unit, the recovery chamber, and the compression chamber of the second shock absorber, and the hydraulic oil tank are interconnected.

[0133] When the vehicle is in a right-side descent mode, the suspension operates in the eighth mode. At this time, if... Figure 10 As shown, the hydraulic pump 300 is in the off state, the first directional valve 411 is in the third open state, the second directional valve 412 is in the second open state, the third directional valve 413 is in the second open state, the fourth directional valve 414 is in the second open state, and the switching valve 420 is in the open state. The second shock absorber is interconnected with the hydraulic oil tank, that is, the energy storage unit, the recovery chamber, and the compression chamber of the second shock absorber are interconnected with the hydraulic oil tank. The energy storage unit, the recovery chamber, and the compression chamber of the first shock absorber are interconnected.

[0134] When the vehicle is in a left-side descent mode, the suspension operates in the ninth mode. At this time, if... Figure 11 As shown, the hydraulic pump 300 is in the off state, the first directional valve 411 is in the first open state, the second directional valve 412 is in the second open state, the third directional valve 413 is in the second open state, the fourth directional valve 414 is in the second open state, and the switching valve 420 is in the open state. The first shock absorber is interconnected with the hydraulic oil tank, that is, the energy storage unit, the recovery chamber, and the compression chamber of the first shock absorber are interconnected with the hydraulic oil tank. The energy storage unit, the recovery chamber, and the compression chamber of the second shock absorber are interconnected.

[0135] When the vehicle is in exhaust mode, the suspension operates in the tenth mode. At this time, if... Figure 12 and Figure 13As shown, the hydraulic pump 300 is in the start state, the first directional valve 411 alternately operates in the first and third conducting states, the second directional valve 412 is in the second conducting state, the third directional valve 413 is in the third conducting state, the fourth directional valve 414 is in the second conducting state, and the switching valve 420 is in the conducting state. Specifically, when the first directional valve is in the first conducting state, the recovery chamber is connected to the hydraulic pump, and the compression chamber is connected to the hydraulic oil tank. The fluid in the recovery chamber is emptied, thus venting the recovery chamber. When the first directional valve is in the first conducting state, the compression chamber is connected to the hydraulic pump, and the recovery chamber is connected to the hydraulic oil tank. The fluid in the compression chamber is emptied, thus venting the compression chamber. This process is repeated multiple times to expel the gas from the system.

[0136] The hydraulic lifting suspension system provided in this application embodiment also includes a controller, which is connected to the hydraulic pump and each control valve included in the control valve assembly; the controller can control the working state of the hydraulic pump and the conduction state of each control valve.

[0137] The controller is used to acquire the real-time operating conditions of the vehicle and control the working state of the hydraulic pump and the conduction state of each control valve included in the control valve assembly according to the real-time operating conditions of the vehicle.

[0138] Specifically, when the controller obtains that the real-time operating condition of the vehicle is normal driving condition, it controls the hydraulic pump to be in the off state, controls the first reversing valve to be in the second open state, controls the second reversing valve to be in the second open state, controls the third reversing valve to be in the second open state, controls the fourth reversing valve to be in the second open state, and controls the switching valve to be in the off state.

[0139] When the controller detects that the vehicle's real-time operating condition is anti-rollover, the hydraulic pump is shut off, the first directional valve is in its second conducting state, the second directional valve is in its second conducting state, the third directional valve is in its first conducting state, the fourth directional valve is in its second conducting state, and the switching valve is in its open state. When the controller detects that the vehicle's real-time operating condition is high-grip, the hydraulic pump is shut off, the first directional valve is in its second conducting state, the second directional valve is in its second conducting state, the third directional valve is in its third conducting state, the fourth directional valve is in its first conducting state, and the switching valve is in its open state. When the controller detects that the vehicle's real-time operating condition is simultaneous lifting, the hydraulic pump is activated. In the active state, the controller controls the first directional valve to be in the first conducting state, the second directional valve to be in the first conducting state, the third directional valve to be in the second conducting state, and the fourth directional valve to be in the second conducting state, while the switching valve is in the open state. When the controller obtains that the real-time vehicle operating condition is the left-side lifting condition, the controller starts the hydraulic pump, controls the first directional valve to be in the first conducting state, the second directional valve to be in the second conducting state, the third directional valve to be in the second conducting state, the fourth directional valve to be in the second conducting state, and the switching valve is in the open state. When the controller obtains that the real-time vehicle operating condition is the right-side lifting condition, the controller starts the hydraulic pump, controls the first directional valve to be in the second conducting state, and controls the second directional valve to be in the second conducting state. In the second conduction state, the third and fourth directional valves are controlled to be in the second conduction state, and the switching valve is controlled to be in the open state. When the controller obtains that the real-time vehicle operating condition is simultaneous descent, the hydraulic pump is controlled to be in the closed state, the first directional valve is controlled to be in the third conduction state, the second directional valve is controlled to be in the first conduction state, the third directional valve is controlled to be in the second conduction state, the fourth directional valve is controlled to be in the second conduction state, and the switching valve is controlled to be in the conduction state. When the controller obtains that the real-time vehicle operating condition is right-side descent, the hydraulic pump is controlled to be in the closed state, the first directional valve is controlled to be in the third conduction state, the second directional valve is controlled to be in the second conduction state, the third directional valve is controlled to be in the second conduction state, and the fourth directional valve is controlled to be in the open state. When the valve is in the second conducting state, the control switch valve is in the conducting state; when the controller obtains the real-time vehicle operating condition as the left-side descent condition, the control hydraulic pump is in the closed state, the first reversing valve is in the first conducting state, the second reversing valve is in the second conducting state, the third reversing valve is in the second conducting state, the fourth reversing valve is in the second conducting state, and the control switch valve is in the conducting state; when the controller obtains the real-time vehicle operating condition as the exhaust condition, the control hydraulic pump is in the started state, the first reversing valve is alternately in the first conducting state and the third conducting state, the second reversing valve is in the second conducting state, the third reversing valve is in the third conducting state, the fourth reversing valve is in the second conducting state, and the control switch valve is in the conducting state.

[0140] Example 2

[0141] This embodiment relates to a vehicle, the body of which is equipped with the hydraulic lifting suspension system of Embodiment 1.

[0142] The vehicle in this embodiment uses the hydraulic lifting suspension system described in Embodiment 1. By installing a control valve assembly between the hydraulic oil tank, hydraulic pump, and the oil chamber and energy storage unit of the shock absorber, the connection between the hydraulic oil tank, hydraulic pump, and the recovery chamber and compression chamber of the shock absorber can be switched by changing the conduction state of each control valve in the control valve assembly and the working state of the hydraulic pump. In particular, by adjusting the conduction state of the third reversing valve, the connection between the recovery chamber and compression chamber of the two shock absorbers located on the same axle can also be switched, thereby achieving the switching of the hydraulic suspension working mode. This makes the vehicle suitable for various vehicle working conditions, can have multiple characteristics, and improve the user experience.

[0143] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A hydraulic lifting suspension system, characterized in that, include: The vibration damper includes a recovery chamber and a compression chamber; A hydraulic oil tank, wherein a hydraulic pump is installed inside the hydraulic oil tank; A control valve assembly, which is connected to the hydraulic oil tank, the hydraulic pump, and the shock absorber including the recovery chamber and the compression chamber; The control valve assembly includes a third reversing valve connected between two shock absorbers located on the same axle. The third reversing valve is used to adjust the conduction mode between the recovery chamber and the compression chamber corresponding to the two shock absorbers, respectively. Specifically, by switching the conduction state of each control valve in the control valve assembly and the working state of the hydraulic pump, the communication mode between the hydraulic oil tank, the hydraulic pump, and the recovery chamber and compression chamber of the shock absorber is adjusted.

2. The hydraulic lifting suspension system according to claim 1, characterized in that, The control valve assembly includes a directional valve group and a switching valve; The reversing valve group corresponds one-to-one with the shock absorber group, and the shock absorber group includes two shock absorbers mounted on the same axle. The first port of the switching valve is connected to the hydraulic oil tank, and the second port of the switching valve is connected to the directional valve assembly; the switching valve includes a first conducting state and a second conducting state, wherein the switching valve is in the first conducting state. The reversing valve assembly is also connected to the hydraulic pump and each of the dampers in the damper assembly.

3. The hydraulic lifting suspension system according to claim 2, characterized in that, The reversing valve group includes a first reversing valve, a second reversing valve, a third reversing valve, and a fourth reversing valve; The vibration damper group includes a first vibration damper and a second vibration damper, wherein the energy storage unit corresponding to the first vibration damper is connected to the compression chamber, and the energy storage unit corresponding to the second vibration damper is connected to the compression chamber and the recovery chamber through the fourth reversing valve. The first reversing valve and the second reversing valve are used to control whether the hydraulic pump is simultaneously connected to the first shock absorber and the second shock absorber, and whether the hydraulic oil tank is simultaneously connected to the first shock absorber and the second shock absorber. The third reversing valve is used to control the communication between the four sub-oil chambers of the damper assembly, wherein the four sub-oil chambers are the recovery chamber and compression chamber of the first damper and the recovery chamber and compression chamber of the second damper, respectively. The fourth reversing valve is used to control the connection between the energy storage unit, compression chamber and recovery chamber corresponding to the second damper.

4. The hydraulic lifting suspension system according to claim 3, characterized in that, The first port of the first reversing valve is connected to the compression chamber corresponding to the first shock absorber, the second port of the first reversing valve is connected to the second port of the hydraulic pump, the third port of the first reversing valve is connected to the recovery chamber corresponding to the second shock absorber, and the fourth port of the first reversing valve is connected to the second port of the switching valve. The first directional valve includes a first open state, a second open state, and a third open state; When the first directional valve is in the first open state, the first port and the fourth port of the first directional valve are connected, and the second port and the third port are connected. When the first directional valve is in the second open state, the first port, second port, third port and fourth port of the first directional valve are not connected to each other; When the first directional valve is in the third conducting state, the first and second ports of the first directional valve are connected, and the third and fourth ports are connected.

5. The hydraulic lifting suspension system according to claim 4, characterized in that, The first port of the second reversing valve is connected to the compression chamber corresponding to the first shock absorber, and the second port of the second reversing valve is connected to the recovery chamber corresponding to the second shock absorber. The second directional valve includes a first open state and a second open state; When the second directional valve is in the first open state, the first port and the second port of the second directional valve are connected. When the second directional valve is in the second open state, the first port and the second port of the second directional valve are not connected.

6. The hydraulic lifting suspension system according to claim 5, characterized in that, The first port of the third reversing valve is connected to the recovery chamber corresponding to the first damper, the second port of the third reversing valve is connected to the compression chamber corresponding to the first damper, the third port of the third reversing valve is connected to the recovery chamber corresponding to the second damper, and the fourth port of the third reversing valve is connected to the compression chamber corresponding to the second damper. The third directional valve includes a first open state, a second open state, and a third open state; When the third directional valve is in the first open state, the first port and the fourth port of the third directional valve are connected, and the second port and the third port are connected. When the third directional valve is in the second open state, the first and second ports of the third directional valve are connected, and the third and fourth ports are connected. When the third directional valve is in the third open state, the first port and the third port of the third directional valve are connected, and the second port and the fourth port are connected.

7. The hydraulic lifting suspension system according to claim 6, characterized in that, The first port of the fourth reversing valve is connected to the energy storage unit corresponding to the second vibration damper, the second port of the fourth reversing valve is connected to the recovery chamber corresponding to the second vibration damper, and the third port of the fourth reversing valve is connected to the compression chamber corresponding to the second vibration damper. The fourth directional valve includes a first open state and a second open state; When the fourth directional valve is in the first open state, the first port and the second port of the fourth directional valve are connected. When the fourth directional valve is in the second open state, the first port and the third port of the fourth directional valve are connected.

8. The hydraulic lifting suspension system according to claim 7, characterized in that, When the vehicle is in normal driving conditions, the hydraulic pump is in the off state, the first reversing valve is in the second open state, the second reversing valve is in the second open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the off state. When the vehicle is in anti-roll operation, the hydraulic pump is in the off state, the first reversing valve is in the second open state, the second reversing valve is in the second open state, the third reversing valve is in the first open state, the fourth reversing valve is in the second open state, and the switching valve is in the off state. When the vehicle is in a high grip condition, the hydraulic pump is in the off state, the first reversing valve is in the second open state, the second reversing valve is in the second open state, the third reversing valve is in the third open state, the fourth reversing valve is in the first open state, and the switching valve is in the off state. When the vehicle is in a simultaneous lifting condition, the hydraulic pump is in the start state, the first reversing valve is in the first open state, the second reversing valve is in the first open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the open state. When the vehicle is in the left-side lifting condition, the hydraulic pump is in the start state, the first reversing valve is in the first open state, the second reversing valve is in the second open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the open state. When the vehicle is in the right-side lifting condition, the hydraulic pump is in the start state, the first reversing valve is in the second open state, the second reversing valve is in the second open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the open state. When the vehicle is in a simultaneous descent condition, the hydraulic pump is in the off state, the first reversing valve is in the third open state, the second reversing valve is in the first open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the open state. When the vehicle is in the right-side descent mode, the hydraulic pump is in the off state, the first reversing valve is in the third open state, the second reversing valve is in the second open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the open state. When the vehicle is in the left-side descent mode, the hydraulic pump is in the off state, the first reversing valve is in the first open state, the second reversing valve is in the second open state, the third reversing valve is in the second open state, the fourth reversing valve is in the second open state, and the switching valve is in the open state. When the vehicle is in exhaust mode, the hydraulic pump is in the start state, the first reversing valve alternately enters the first and third open states, the second reversing valve enters the second open state, the third reversing valve enters the third open state, the fourth reversing valve enters the second open state, and the switching valve is in the open state.

9. The hydraulic lifting suspension system according to any one of claims 1 to 8, characterized in that, Also includes: The controller is connected to the hydraulic pump and each control valve included in the control valve assembly; The controller is used to acquire the real-time operating conditions of the vehicle and control the working state of the hydraulic pump and the conduction state of each control valve included in the control valve assembly according to the real-time operating conditions of the vehicle.

10. A vehicle, characterized in that, Includes the hydraulic lifting suspension system as described in any one of claims 1 to 9.

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