Active Hydraulic Interconnected Suspension

Abstract

The present invention provides an active hydraulic interconnected suspension, including two left-right symmetrically arranged shock absorbing assemblies, a continuous damping control module, a first oil pipe and a second oil pipe; the upper end of the shock absorbing assembly is connected to the vehicle body, and the lower end is connected to the steering knuckle; the continuous damping control module includes a plurality of sensors, a controller and an actuator, the actuator includes an integrated seat and two damping valve groups, the controller and the two damping valve groups are integrated into one body, and the damping valve group includes a plurality of damping valves; one end of the first oil pipe is connected to the first chamber of one of the shock absorbers, and the other end is connected to the second chamber of the other shock absorber. In the active hydraulic interconnected suspension provided by the present invention, the continuous damping controller can adjust the stiffness and damping, and the controller controls the valve core movement of the corresponding damping valve; the traditional stabilizer bar and connecting rod are eliminated, and the space occupied by the chassis in the front of the cabin is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle suspensions, and in particular relates to an active hydraulic interconnected suspension. Background Art

[0002] Intelligent suspension technology is a new trend in the development of future automotive chassis technology. Intelligent suspension can be seen as a suspension system composed of springs and shock absorbers with variable characteristics. During the driving process of the vehicle, sensors collect information about the flatness of the road surface and transmit it to the suspension control module. The control module adjusts the stiffness of the spring and the damping state of the shock absorber according to the optimized parameter instructions of the optimal spring and shock absorber under various conditions stored in the computer, so as to ensure the smoothness of the vehicle's driving and the stability of its handling.

[0003] One end of the shock absorber 11' in the prior art is fixedly connected to the vehicle body, and the other end is connected to the steering knuckle. A bracket connected to the connecting rod 9 is provided on the cylinder of the shock absorber 11'; the stabilizer bar 8 is fixedly connected to the subframe through a rubber bushing / bracket, and the two ends of the stabilizer bar 8 are respectively connected to the left and right shock absorbers through the connecting rod 9. The stabilizer bar 8 runs through the left and right wheels as a whole, occupying a large space in the front cabin, which is not conducive to the design of the front-wheel drive vehicle power system, cooling system and body structure. Since the stabilizer bar 8 and the connecting rod 9 are both rigid components, the stiffness and damping of the vehicle suspension system itself cannot be adjusted. If the stabilizer bar 8 and the connecting rod 9 are made soft, the shock absorber is easily pressed to the bottom, and the steering is not flexible during intense driving; if the stabilizer bar 8 and the connecting rod 9 are made too hard, the shock absorber will have difficulty in gripping on uneven ground, and the control will also be poor, which increases the burden on the driver. Summary of the invention

[0004] An embodiment of the present invention provides an active hydraulic interconnected suspension, aiming to solve the problems in the prior art that the stabilizer bar occupies a large amount of space in the front cabin, affects the vehicle body structure design, and the stiffness and damping of the suspension system cannot be adjusted, causing driving burden.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide an active hydraulic interconnected suspension, comprising two left-right symmetrically arranged vibration reduction components, a continuous damping control module, a first oil pipe and a second oil pipe;

[0006] The vibration reduction assembly comprises:

[0007] A vibration damping support, the upper end of which is connected to the vehicle body;

[0008] A shock absorber, the lower end of which is connected to the steering knuckle, and a sealed chamber is formed inside the shock absorber; and

[0009] A piston rod, the upper end of which is connected to the vibration-damping support, and the lower end of which is connected to a piston, wherein the piston is in sealing and sliding cooperation with the chamber up and down to separate the chamber into a first chamber and a second chamber which are isolated from each other from top to bottom; and

[0010] An elastic member, two ends of which are respectively connected to the vibration absorber and the vibration-damping support;

[0011] The continuous damping control module comprises:

[0012] Controller;

[0013] A plurality of sensors, used for detecting dynamic signals of the vehicle and communicatively connected with the controller; and

[0014] The actuator comprises an integrated seat and two damping valve groups, wherein the controller and the two damping valve groups are integrated into one body and are both connected to the integrated seat, the damping valve groups are communicatively connected to the controller, and the controller can adjust the opening of the damping valve groups according to the dynamic signal of the vehicle;

[0015] One end of the first oil pipe is connected to the first chamber of one of the shock absorbers, and the other end is connected to the second chamber of the other shock absorber; one end of the second oil pipe is connected to the second chamber of one of the shock absorbers, and the other end is connected to the first chamber of the other shock absorber;

[0016] One of the damping valve groups is arranged on the first oil pipe, and the other damping valve group is arranged on the second oil pipe.

[0017] In a possible implementation, the shock absorber specifically includes:

[0018] A working cylinder, in which the piston is slidably arranged, the piston divides the interior of the working cylinder into an upper chamber and a lower chamber, the outer periphery of the upper chamber is provided with a first oil port, and the outer periphery of the lower chamber is provided with a second oil port; and

[0019] A liquid storage cylinder is sleeved on the outer circumference of the working cylinder, and the bottom of the liquid storage cylinder is connected to the steering knuckle. A liquid storage chamber and a transition chamber isolated from each other from top to bottom are formed between the liquid storage cylinder and the working cylinder. The liquid storage chamber and the upper chamber constitute the first chamber, and the transition chamber and the lower chamber constitute the second chamber. The first oil port can connect the upper chamber and the liquid storage chamber, and the second oil port can connect the lower chamber and the transition chamber. The outer circumference of the liquid storage cylinder is provided with a first oil inlet and a second oil inlet and a second oil inlet, which are isolated from each other. The first oil inlet and the outlet are connected to the integrated seat through the first oil pipe, and the second oil inlet and the outlet are connected to the integrated seat through the second oil pipe.

[0020] In a possible implementation, a dust cover is connected between the working cylinder and the vibration-damping support, and the dust cover is arranged between the inside of the elastic member and the outer periphery of the piston rod.

[0021] In a possible implementation, the actuator further includes a hydraulic pump, and the hydraulic pump, the controller, and the two damping valve groups are integrated into one body;

[0022] The oil outlet of the hydraulic pump is connected to the first oil pipe and the second oil pipe respectively.

[0023] In a possible implementation, the damping valve group includes two damping valves, one of which is located between the hydraulic pump and the first oil inlet and outlet, and the other of which is located between the hydraulic pump and the second oil inlet and outlet.

[0024] In a possible implementation, the active hydraulic interconnected suspension further includes two accumulators, the accumulators respectively corresponding to the shock absorbers one by one, and the accumulators include:

[0025] The energy storage shell has an oil hole and an air inlet at both ends, the oil hole is connected to the first oil pipe or the second oil pipe, and the air inlet is used to introduce inert gas;

[0026] A sliding plug is slidably disposed in the energy storage housing, the sliding plug divides the interior of the energy storage housing into an air chamber and an oil chamber, the oil hole is connected to the oil chamber, and the air inlet is connected to the air chamber;

[0027] a bellows, disposed in the oil chamber, the bellows being filled with hydraulic oil, one end of the bellows being sealedly connected to the outer periphery of the oil hole, the other end of the bellows being connected to the sliding plug, and the interior of the bellows being communicated with the oil hole; and

[0028] The two ends of the push piece are respectively connected to the two inner ends of the air chamber.

[0029] In a possible implementation, the oil chamber and the air chamber are both filled with inert gas;

[0030] The air inlet hole and the sliding plug are provided with an air vent along the sliding path, and the two ends of the air vent are respectively connected to the oil chamber and the air chamber.

[0031] In a possible implementation, the actuator further includes a warning light, and the warning light is communicatively connected to the controller.

[0032] In a possible implementation, the active hydraulic interconnected suspension further includes an oil storage tank, and the oil storage tank is connected to the hydraulic pump through a second oil pipe assembly;

[0033] The second oil pipe assembly includes two oil filling pipes. The actuator is provided with two switch valves, which correspond to the oil filling pipes one by one. The two switch valves are respectively used to control the opening and closing of the corresponding oil filling pipes.

[0034] In a possible implementation, the oil storage tank includes:

[0035] An oil storage tank body, an oil storage space is formed inside the oil storage tank body, an oil outlet is opened on the oil storage tank body, the oil outlet is communicated with the oil storage space, the oil outlet is communicated with the hydraulic pump through the oil pipe, and a refueling port is opened on the top of the oil storage tank body; and

[0036] A fuel filler cap is arranged on the fuel filler opening.

[0037] Compared with the prior art, the active hydraulic interconnected suspension provided in this application has the following beneficial effects:

[0038] (1) The shock absorber assembly provides damping and stiffness. The continuous damping control module adjusts the oil pressure in the first oil pipe and the second oil pipe by adjusting the opening of the damping valve group. The oil can flow from the first chamber into the integrated seat, and enter the second chamber of another shock absorber after being adjusted by the damping valve group. It can also enter the first chamber of another shock absorber from the second chamber in the opposite direction, thereby adjusting the oil content in the first chamber and the second chamber, and then controlling the lifting and lowering of the piston rod, so that the damping and stiffness of the shock absorber can be adjusted, and the damping and stiffness of the hydraulic interconnected suspension can be adjusted. The sensor monitors various dynamic signals of the vehicle, and the controller controls the movement of the damping valve group to change the opening of the damping valve group. The larger the valve opening, the greater the oil flow, the smaller the damping force, and the softer the overall suspension; the smaller the valve opening, the smaller the oil flow, the greater the damping force, and the harder the suspension. When the vehicle is driving on a rough road, by increasing the opening of the damping valve group to reduce the damping force and absorb the vibration from the road, the vehicle body bumps can be effectively reduced to ensure riding comfort;

[0039] (2) The device replaces the traditional stabilizer bar and connecting rod with a continuous damping control module. The continuous damping control module has a small span and can reduce the space occupied by the chassis in the front of the cabin, which is beneficial to the design of the power system, cooling system and body structure, and facilitates the lightweight design of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0041] Figure 1 It is a schematic diagram of the main structure of a hydraulic interconnected suspension in the prior art;

[0042] Figure 2 A schematic diagram of the structure of an active hydraulic interconnected suspension provided by an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of an active hydraulic interconnected suspension used in an embodiment of the present invention;

[0044] Figure 4 A schematic diagram of the structure of a continuous damping control module used in an embodiment of the present invention;

[0045] Figure 5 A schematic diagram of the structure of a vibration reduction assembly used in an embodiment of the present invention;

[0046] Figure 6 A cross-sectional view of a vibration absorber used in an embodiment of the present invention;

[0047] Figure 7 for Figure 6 A partial enlarged view of middle A;

[0048] Figure 8 A cross-sectional schematic diagram of an accumulator used in an embodiment of the present invention;

[0049] Fig. 9 This is a schematic diagram of the structure of the oil storage tank used in the embodiment of the present invention;

[0050] Fig.10 An oil circuit diagram of the active hydraulic interconnected suspension provided by an embodiment of the present invention under flat jumping conditions;

[0051] Fig.11 An oil circuit diagram of an active hydraulic interconnected suspension under a roll condition provided by an embodiment of the present invention;

[0052] Fig.12 The oil circuit diagram of the active hydraulic interconnected suspension provided in an embodiment of the present invention when adjusting the vehicle body height.

[0053] Description of reference numerals:

[0054] 1. Vibration reduction assembly; 11. Shock absorber;

[0055] 111, working cylinder; 111a, upper chamber; 111b, lower chamber; 111c, first oil port; 111d, second oil port;

[0056] 112, liquid storage cylinder; 112a, liquid storage chamber; 112b, first oil inlet and outlet; 112c, second oil inlet and outlet; 112d, transition chamber;

[0057] 113. piston; 114. piston rod;

[0058] 12. Elastic part; 13. Vibration-damping support; 14. Dust cover;

[0059] 2. Continuous damping control module; 21. Controller; 22. Actuator; 221. Hydraulic pump; 222. Damping valve; 223. Switch valve; 224. Integrated seat;

[0060] 3. Accumulator; 31. Accumulator housing; 311. Oil hole; 32. Sliding plug; 321. Vent hole; 33. Bellows; 34. Pushing piece; 35. Blocking piece;

[0061] 4. Oil storage tank; 41. Oil storage tank body; 411. Oil outlet; 42. Oil filling cap;

[0062] 5. The first oil pipeline;

[0063] 6. Second oil pipe;

[0064] 7. Second oil pipe assembly; 71. Oil filling pipe;

[0065] 8. Stabilizer bar;

[0066] 9. Connecting rod. DETAILED DESCRIPTION

[0067] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0068] It should be noted that the directions or positional relationships indicated by terms such as “length”, “width”, “height”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “head” and “tail” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the invention.

[0069] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0071] In the prior art, two separate solenoid valves are arranged on the interconnection frame, and the solenoid valves correspond to the shock absorbers 11' one by one. The solenoid valves cooperate with the stabilizer bar 8 to work. The stabilizer bar 8 has a fixed length and a large space span, which makes the overall interconnection frame large in size and occupies space.

[0072] When the car is driving normally, the body is mainly supported by springs, and the left and right wheels are up and down at the same time. At this time, both the left and right springs work. However, when the car turns, for example, when the car turns to the right, the left wheel jumps up and the right wheel jumps down, which will cause the spring of the right wheel to react. The spring under the left wheel cannot support the weight of the car body at this time. The stabilizer bar 8 is connected to the connecting rod 9, and the other side of the connecting rod 9 is connected to the lower part of the shock absorber 11'. The lower part of the shock absorber 11' is rigidly connected to the steering knuckle and the wheel. Through the torsion of the stabilizer bar 8 itself, the rebound of the right wheel is limited, which indirectly helps the left spring to play a supporting role.

[0073] To solve the above mentioned problems, please also refer to Figures 1 to 9, the active hydraulic interconnected suspension provided by the present invention is now described. The active hydraulic interconnected suspension includes two left-right symmetrically arranged damping components 1, a continuous damping control module 2, a first oil pipe 5 and a second oil pipe 6. The damping component 1 includes a damping support 13, a shock absorber 11, a piston rod 114 and an elastic member 12. The upper end of the damping support 13 is connected to the vehicle body; the lower end of the shock absorber 11 is connected to the steering knuckle, and a sealed chamber is formed inside the shock absorber 11; the upper end of the piston rod 114 is connected to the damping support 13, and the lower end is connected to the piston 113, and the piston 113 is sealed and slidably matched with the chamber up and down to separate the chamber into a first chamber and a second chamber that are isolated from each other from top to bottom; the two ends of the elastic member 12 are respectively connected to the shock absorber 11 and the damping support 13, and are sleeved on the outer periphery of the piston rod 114; the continuous damping control module 2 includes a controller 21, multiple sensors and an actuator 22. Multiple sensors are used to detect dynamic signals of the vehicle and are communicatively connected to the controller 21; the actuator 22 includes an integrated seat 224 and two damping valve groups, the controller 21 and the two damping valve groups are integrated into one body and are both connected to the integrated seat 224, the hydraulic pump 221 extends out of the integrated seat 224, the damping valve group is communicatively connected to the controller 21, and the controller 21 can adjust the opening of the damping valve group according to the dynamic signals of the vehicle, one end of the first oil pipe 5 is connected to the first chamber of one of the shock absorbers 11, and the other end is connected to the second chamber of the other shock absorber 11; one end of the second oil pipe 6 is connected to the second chamber of one of the shock absorbers 11, and the other end is connected to the first chamber of the other shock absorber 11; one damping valve group is arranged on the first oil pipe 5, and the other damping valve group is arranged on the second oil pipe 6.

[0074] It should be noted that the sensors include a vehicle speed sensor, a vehicle acceleration sensor, a steering wheel angle sensor, and a vehicle height sensor; the multiple sensors are respectively arranged on the vehicle body, and continuously transmit the corresponding dynamic signals of the vehicle to the controller 21. The dynamic signals are vehicle speed, vehicle acceleration, steering wheel angle, and vehicle height.

[0075] In specific implementation, the vehicle speed sensor can be a magnetoelectric sensor or a photoelectric sensor; the vehicle body acceleration sensor can be a piezoelectric acceleration sensor or a capacitive acceleration sensor; the steering wheel angle sensor can be a rotation angle sensor, a rotary encoder or a gyroscope; the vehicle body height sensor can be a linear Hall sensor, a magnetoresistive sensor, an electromagnetic induction sensor and a differential Hall sensor.

[0076] During specific implementation, the integrated seat 224 is a hollow shell, and the two damping valve groups are both disposed in the integrated seat 224 .

[0077] It should be noted that Figure 10-12 The dotted arrows in the figure represent the oil flow direction of the vehicle during the extension stroke, and the solid arrows represent the oil flow direction of the vehicle during the compression stroke.

[0078] It should be noted that the vibration component 1 is arranged along the up-down direction, and the up-down direction of the vibration reduction component 1 is the same as the up-down direction of the vehicle body.

[0079] It should be noted that the controller 21 is an automobile electronic control unit ECU, and the hydraulic pump 221 is controlled by the ECU to establish a control oil pressure in the oil circuit and dynamically adjust the extension and contraction state of the shock absorbing assembly 1 by filling and discharging oil.

[0080] The principle adopted in this embodiment is that the two shock absorbing components 1 are interconnected on the left and right through the continuous damping control module 2, and the pipeline pressure in the first oil pipe 5 and the second oil pipe 6 is adjusted by the damping valve group to replace the stabilizer bar 8 to limit the rebound of the left and right wheels and help the upward spring to support the vehicle body.

[0081] It should be noted that the damping valve group can block the flow of oil in the first oil pipe 5 or the second oil pipe 6, and can also adjust the opening of the damping valve in the damping valve group to control the flow speed of oil in the first oil pipe 5 or the second oil pipe 6.

[0082] In specific implementation, the working principle of the oil circuit is that when one of the two shock absorbers 11 is compressed, the piston rod 114 on the other shock absorber 11 moves away from the shock absorber 11, and the oil in the first chamber enters the first oil pipe 5 under the squeezing of the piston 113, and enters the actuator 22 through the first oil pipe 5, and the damping valve group is connected to the first oil pipe 5; the damping valve group adjusts the opening according to the signal of the controller 21, and cooperates with the hydraulic pump 221 to change the output oil pressure, and the output oil enters the second chamber of the compressed shock absorber 11 through the first oil pipe 5. At this time, the oil in the second chamber increases, pushing the piston 113 up, and then driving the piston rod 114 to rise, and cooperate with the elastic member 12 to support the vehicle body. The continuous damping control module 2 controls the movement of the valve core through the electromagnetic coil, thereby controlling the opening of each electromagnetic valve port. The larger the valve port opening, the smaller the damping force, and the softer the suspension. The smaller the valve port, the greater the damping force, and the harder the suspension.

[0083] Specifically, the spring 12 provides stiffness, the shock absorber 11 provides damping, and the continuous damping control module 2 plays both stiffness and damping roles.

[0084] The active hydraulic interconnected suspension has the characteristics of anti-roll, anti-pitch and smooth driving. It can keep the body balance to the maximum extent when cornering, with a short braking distance. Downforce will be generated when braking, increasing the friction between the tire and the ground. It can effectively absorb the vibration of the road to protect the safety of passengers, and also reduce the impact on the axle, tire and frame.

[0085] The active hydraulic interconnected suspension has a large unit energy storage ratio and can withstand greater loads. At the same time, it reduces tire impact, increases tire and rim life, and extends tire, brake pad and chassis life.

[0086] The active hydraulic interconnected suspension provided in this embodiment has variable stiffness, and the stiffness changes with the load, thereby ensuring that the offset frequency remains unchanged. As long as the offset frequency is adjusted to a suitable position, the comfort level of the vehicle can be met regardless of whether it is empty or fully loaded.

[0087] The continuous damping control module 2 can be adjusted in real time according to the vehicle dynamic signal. On the one hand, it can utilize the nonlinear hard characteristics of hydraulics to limit the dynamic amplitude of the whole vehicle, avoid resonance and reduce the bumps caused by large impacts; on the other hand, it can utilize the nonlinear characteristics of compressed air stiffness to reduce stiffness when the suspension is subjected to rare bumps, thereby improving the comfort of the driver and passengers.

[0088] It should be noted that the lower end of the shock absorber 11 is connected to the steering knuckle, and the upper end is connected to the vehicle body through the shock absorber support 13. The friction between the valve wall, pipeline and hydraulic oil and the internal friction between the hydraulic oil molecules form damping, converting the vibration energy into heat energy and dissipating it into the outside air. The vibration energy is converted into heat energy and dissipated, so that the force vibration will not be transmitted to the vehicle body. The elastic member 12 converts part of the energy of the wheel's up and down bumps into elastic potential energy, thereby reducing the bumpiness of the vehicle body and improving the stability and comfort of driving.

[0089] Compared with the prior art, the active hydraulic interconnected suspension provided in this embodiment has the following beneficial effects:

[0090] (1) The shock absorber assembly 1 provides damping and stiffness. The continuous damping control module 2 adjusts the oil pressure in the first oil pipe 5 and the second oil pipe 6 by adjusting the opening of the damping valve group. The oil can flow from the first chamber into the integrated seat 224, and enter the second chamber of another shock absorber 11 after being adjusted by the damping valve group and the hydraulic pump 221. It can also reversely enter the first chamber of another shock absorber 11 from the second chamber, thereby adjusting the oil content in the first chamber and the second chamber, and then realizing the control of the piston rod 114 to move up and down, so that the damping and The stiffness can be adjusted, so that the damping and stiffness of the hydraulic interconnected suspension can be adjusted. The sensor monitors various dynamic signals of the vehicle, and the controller 21 controls the movement of the damping valve group to change the opening of the damping valve group. The larger the valve opening, the greater the oil flow, the smaller the damping force, and the softer the suspension as a whole; the smaller the valve opening, the smaller the oil flow, the greater the damping force, and the harder the suspension. When the vehicle is driving on a rough road, by increasing the opening of the damping valve group to reduce the damping force and absorb the vibration from the road, the vehicle body bumps can be effectively reduced to ensure riding comfort.

[0091] (2) The device replaces the traditional stabilizer bar and connecting rod with a continuous damping control module. The continuous damping control module has a small span and can reduce the space occupied by the chassis in the front of the cabin, which is beneficial to the design of the power system, cooling system and body structure, and facilitates the lightweight design of the vehicle.

[0092] In some embodiments, see Figures 5 to 7 The shock absorber 11 specifically includes a working cylinder 111 and a liquid storage cylinder 112. A piston 113 is slidably arranged inside the working cylinder 111, and the piston 113 divides the inside of the working cylinder 111 into an upper chamber 111a and a lower chamber 111b. A first oil port 111c is provided on the outer periphery of the upper chamber 111a, and a second oil port 111d is provided on the outer periphery of the lower chamber 111b. The liquid storage cylinder 112 is sleeved on the outer periphery of the working cylinder 111, and the bottom of the liquid storage cylinder 112 is connected to the steering knuckle. The liquid storage chamber 112a and the transition chamber 112d are mutually isolated from top to bottom between the liquid storage cylinder 112 and the working cylinder 111, and the liquid storage chamber 112a and the upper chamber 111a form a The first chamber is formed, the transition chamber 112d and the lower chamber 111b form the second chamber, the first oil port 111c can connect the upper chamber 111a and the liquid storage chamber 112a, the second oil port 111d can connect the lower chamber 111b and the transition chamber 112d, and the outer periphery of the liquid storage cylinder 112 is provided with a first oil inlet and outlet 112b and a second oil inlet and outlet 112c which are isolated from each other. The first oil inlet and outlet 112b is connected to the integrated seat 224 through the first oil pipe 5, and the second oil inlet and outlet 112c is connected to the integrated seat 224 through the second oil pipe 6 of another group of first oil pipe components 5.

[0093] The shock absorber 11 provided in this embodiment has a simple structure. The oil in the liquid storage chamber 112a enters the upper chamber 111a through the first oil port 111c, and the oil in the transition chamber 112d enters the lower chamber 111b through the second oil port 111d. The piston 113 slides in the working cylinder 111, and the amount of oil in the upper chamber 111a and the lower chamber 111b changes, thereby ensuring the lubrication effect between the piston 113 and the working cylinder 111. The piston rod 114 drives the piston 113 to move up and down in the working cylinder 111, so that the piston rod 114 is extended and retracted relative to the working cylinder 111. The piston rod 114 is connected to the shock absorber support 13, and the shock absorber support 13 is connected to the vehicle body. The bottom of the oil storage cylinder 112 is connected to the steering knuckle, and the oil storage cylinder 112 moves closer to or farther from the vehicle body, thereby realizing the up and down jumping movement of the steering knuckle, thereby realizing the up and down jumping movement of the tire. The second oil inlet and outlet 112 c cooperates with the first oil inlet and outlet 112 b to achieve communication between the liquid storage cylinder 112 and the integrated seat 224 .

[0094] In some embodiments, see Figure 5A dust cover 14 is connected between the working cylinder 111 and the vibration reduction support 123, and is disposed between the interior of the elastic member 12 and the periphery of the piston rod 114. One end of the dust cover 14 is sealedly connected to the periphery of the opening of the working cylinder 111 for the piston rod 114 to extend and retract, so as to prevent dust from entering the working cylinder 111 from the opening and contaminating the oil.

[0095] In some embodiments, see Fig.10 The actuator 22 further includes a hydraulic pump 221. The hydraulic pump 221, the controller 21 and the two damping valve groups are integrated into one body. The oil outlet of the hydraulic pump 221 is connected to the first oil pipe 5 and the second oil pipe 6 respectively. The first oil pipe 5 and the second oil pipe 6 realize the communication between the hydraulic pump 221 and the upper chamber 111a, and the hydraulic pump 221 and the lower chamber 111b, so that the hydraulic pump 221 affects the oil changes in the upper chamber 111a and the lower chamber 111b, thereby controlling the up and down movement of the piston rod 114.

[0096] In some embodiments, see Fig.10 The damping valve group includes two damping valves 222, one of which is located between the hydraulic pump 221 and the first oil inlet and outlet 112b, and the other is located between the hydraulic pump 221 and the second oil inlet and outlet 112c. One of the damping valves 222 controls the oil pressure in the first oil pipe 5, and the other damping valve 222 controls the oil pressure in the second oil pipe 5, so as to achieve precise control of the oil system.

[0097] It should be noted that, taking the first oil pipe 5 as an example, one damping valve 222 is arranged on one end of the first oil pipe 5 connected to the integrated seat 224, and the other damping valve 222 is arranged on the other end of the first oil pipe connected to the integrated seat 224. The part of the first oil pipe 5 placed in the integrated seat 224 is also connected to the oil outlet of the hydraulic pump 221.

[0098] In some embodiments, see Figure 1 and Figure 8 The active hydraulic interconnected suspension also includes two accumulators 3, which correspond to the shock absorbers 11 one by one. The accumulators 3 include an energy storage housing 31, a sliding plug 32, a bellows 33, and a push piece 34. The two ends of the energy storage housing 31 are respectively provided with an oil hole 311 and an air inlet (not shown in the figure). The oil hole 311 is connected to the first oil pipe 5 or the second oil pipe 6, and the air inlet is used to introduce inert gas; the sliding plug 32 is slidably arranged in the energy storage housing 31, and the sliding plug 32 divides the interior of the energy storage housing 31 into an air chamber and an oil chamber, the oil hole 311 is connected to the oil chamber, and the air inlet is connected to the air chamber; the bellows 33 is arranged in the oil chamber, and the bellows 33 is filled with hydraulic oil. One end of the bellows 33 is sealed and connected to the outer periphery of the oil hole 311, and the other end is connected to the sliding plug 32, and the interior of the bellows 33 is connected to the oil hole 311; the two ends of the push piece 34 are respectively connected to the inner ends of the air chamber.

[0099] It should be noted that the inert gas is high-pressure nitrogen.

[0100] It should be noted that one of the accumulators 3 is connected to a section of the first oil pipe 5 located between the integrated seat 224 and the second chamber, and the other accumulator 3 is connected to a section of the second oil pipe 6 located between the integrated seat 224 and the second chamber.

[0101] Optionally, the push piece 34 is a coil spring, which has high elasticity and good deformation continuity, and meets the requirements of the push piece 34. Of course, the push piece 34 can also be other elastic components, such as a high-temperature resistant wave spring, as long as it is resistant to high temperatures and can drive the slide plug 32 to move. They are not listed one by one here.

[0102] The accumulator 3 provided in this embodiment has a simple principle. When the vibration damping support 13 is compressed, the piston rod 114 is driven to move toward the working cylinder 111, and the oil in the lower chamber 111b is squeezed, and the compression potential energy is stored in the bellows 33 of the accumulator 3 through the oil pipe 5, thereby achieving the effect of absorbing energy and reducing shock. When the system needs it, the push piece 34 is restored, pushing the sliding plug 32 to squeeze the bellows 33, and the energy in the bellows 33 can be converted into the hydraulic pressure in the lower chamber 111b, thereby causing the piston 113 to rise, so that the vibration damping support 13 plays a supporting role.

[0103] In some embodiments, see Figure 8 The oil chamber and the air chamber are both filled with inert gas; the air inlet is blocked by a plugging member 35, and a vent 321 is provided along the sliding path of the sliding plug 32, and the two ends of the vent 321 are connected to the oil chamber and the air chamber respectively. After the inert gas is introduced into the air inlet, it is blocked by the plugging member 35, so that the oil chamber and the air chamber form a sealed space, and the vent 312 can make the inert gas move to the air chamber and the oil chamber, balance the pressure in the two sealed spaces, and ensure that the sliding plug 32 can slide normally.

[0104] In some embodiments, the actuator 22 further includes a warning light, which is in communication with the controller 21. The warning light is arranged in the cab of the vehicle body, and when any component in the continuous damping control module 2 fails, the controller 21 controls the warning light to light up and warn the driver.

[0105] In some embodiments, the active hydraulic interconnected suspension further includes an oil storage tank 4, which is connected to the hydraulic pump 221 through a second oil pipe assembly 7; the second oil pipe assembly 7 includes two oil injection pipes 71, and the actuator 22 is provided with two switch valves 223, which correspond to the oil injection pipes 71 one by one, and the two switch valves 223 are respectively used to control the on and off of the corresponding oil injection 61. The switch valve 223 can control the amount of oil entering the hydraulic pump 221, ensure the normal operation of the hydraulic pump 221, and avoid the phenomenon of lack of oil in the hydraulic pump 221.

[0106] In some embodiments, see Fig. 9 The oil tank 4 includes an oil tank body 41 and a refueling cap 42. An oil storage space is formed inside the oil tank body 41. An oil outlet 411 is provided on the oil tank body 41. The oil outlet 411 is connected to the oil storage space. The oil outlet 411 is connected to the hydraulic pump 221 through the oil pipe 5. A refueling port is provided on the top of the oil tank body 41. The refueling cap 42 is covered on the refueling port. The oil enters the hydraulic pump 221 from the oil outlet 411 to supply oil to the hydraulic pump 221. The refueling cap 42 facilitates the filling of oil into the oil tank body 41.

[0107] Here is how the active hydraulic interconnected suspension is used in various operating conditions:

[0108] See also Fig.10 , the vehicle speed sensor, the vehicle acceleration sensor, the steering wheel angle sensor and the vehicle height sensor respectively continuously transmit vehicle body dynamic signals to the controller 21. When the wheels on both sides jump up at the same time, that is, the suspensions on both sides are in the compression stroke at the same time, the pistons 113 and the piston rods 114 on both sides move downward relative to the working cylinder 111. At this time, the volume of the oil in the upper chamber 111a increases and the pressure decreases, and the volume of the oil in the lower chamber 111b decreases and the pressure increases. The signal transmitted by the vehicle height sensor changes, and the controller 21 controls the damping valve 222 to open according to the signal of the vehicle height sensor. The hydraulic oil in the lower chamber 111b is compressed and flows in two directions. A part of the hydraulic oil flows into the upper chamber 111a through the damping valve 222. At the same time, due to the entry of the piston rod 114, the volume inside the working cylinder 111 is reduced accordingly, so that the pressure of the accumulator 3 increases, so that the hydraulic oil in the lower chamber 111b enters the accumulator 3 through the oil pipe 5 to store the oil squeezed out by the piston rod 114. The air chamber of accumulator 3 is compressed, the volume decreases, and the pressure increases until the system reaches equilibrium.

[0109] When the wheels jump down at the same time, that is, the suspension is in the extension stroke, the piston 113 and the piston rod 114 on the upper jumping side move upward relative to the shock absorber 11. At this time, the oil volume in the upper chamber 111a decreases and the pressure increases, and the oil volume in the lower chamber 111b increases and the pressure decreases. At this time, the dynamic signal transmitted by the vehicle height sensor changes. The controller 21 controls the damping valve 222 to open according to the dynamic signal of the vehicle height sensor, and the hydraulic oil in the upper chamber 111a flows into the lower chamber 111b of the other working cylinder 111 through the damping valve 222. At the same time, due to the extension of the piston rod 114, the internal volume of the working cylinder 111 increases accordingly, so that a certain negative pressure is generated in the lower chamber 111b, so that the hydraulic oil in the accumulator 3 enters the lower chamber 111b through the oil pipe 6 to compensate for the space moved out by the piston rod 114.

[0110] When the car is in the acceleration start condition, the front of the car will be raised and the rear will be lowered. At this time, the front suspension is in the extension stroke and the rear suspension is in the compression stroke. The pressure of the accumulator 3 of the rear suspension increases, the suspension stiffness increases, and at the same time, the body acceleration signal transmitted by the body acceleration sensor to the controller 21 changes. The controller 21 controls the damping valve 222 according to this signal to increase the suspension damping force, thereby suppressing the lowering of the rear body and reducing the body pitch phenomenon during acceleration.

[0111] When the car is in emergency braking, the front of the car will be lowered and the rear will be raised. At this time, the front suspension is in the compression stroke and the rear suspension is in the extension stroke. The pressure of the front suspension accumulator 3 increases, the suspension stiffness increases, and the body acceleration sensor transmits the body acceleration signal to the controller 21. The controller 21 controls the damping valve 222 to increase the suspension damping force according to the signal, thereby suppressing the lowering of the front body and reducing the body nodding phenomenon during braking.

[0112] See also Fig.11 When the vehicle is in a roll condition, for example, when the vehicle turns left, the left suspension is in an extension stroke, and the right suspension is in a compression stroke, the steering wheel angle sensor and the vehicle speed sensor transmit the vehicle body speed and the steering wheel rotation angle to the controller 21, and the piston 113 and the piston rod 114 move upward relative to the shock absorber 11, and the piston 113 and the piston rod 114 move downward relative to the shock absorber 11. At this time, the oil volume in the left upper chamber 111a decreases and the pressure increases, the oil volume in the lower chamber 111b increases and the pressure decreases, and the oil volume in the right upper chamber 111a increases and the pressure decreases. The volume of the oil increases and the pressure decreases, while the volume of the oil in the lower chamber 111b decreases and the pressure increases. The controller 21 controls the damping valve 222 to open according to the dynamic signal transmitted by the steering wheel angle sensor and the vehicle speed sensor. At this time, the hydraulic oil in the left upper chamber 111a and the right lower chamber 111b enters the accumulator 3 through the damping valve 222. The elastic member 34 on the accumulator 3 acts according to the amount of hydraulic oil flowing in, thereby increasing the oil pressure, offsetting part of the centrifugal force when the vehicle turns, reducing the sinking degree of the outer side of the vehicle, suppressing the roll action, and reducing the shaking of the passengers. At the same time, the hydraulic oil in the accumulator 3 shows the opposite trend, entering the left lower chamber 111b and the right upper chamber 111a through the damping valve 222 to balance the pressure in the oil pipe. On rough roads, the internal pressure of the hydraulic system does not change, ensuring the continuous driving force of the tire. Because the internal parts are interconnected, the suspension system responds more quickly to changes in the road surface.

[0113] See also Fig.12When adjusting the vehicle height, for example, increasing the vehicle height, the vehicle height sensor transmits a dynamic signal of the vehicle height to the controller 21. At this time, the controller 21 controls the switch valve 223 and the damping valve 222 to open according to the signal, and at the same time, the hydraulic pump 221 works, and the oil in the oil storage tank 4 enters the shock absorber 11 and the accumulator 3 through the switch valve 223 and the damping valve 222. At this time, the internal pressure of the hydraulic system increases. On the one hand, the air chamber of the accumulator 3 is compressed, the volume becomes smaller, and the pressure increases; on the other hand, the pressure in the lower chamber 111b increases, pushing the piston 113 and the piston rod 114 upward relative to the shock absorber 11, thereby increasing the vehicle height.

[0114] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An active hydraulic interconnected suspension, characterized in that: It includes two left-right symmetrically arranged vibration reduction components, a continuous damping control module, a first oil pipe and a second oil pipe; The vibration reduction assembly comprises: A vibration damping support, the upper end of which is connected to the vehicle body; A shock absorber, the lower end of which is connected to the steering knuckle, and a sealed chamber is formed inside the shock absorber; and A piston rod, the upper end of which is connected to the vibration-damping support, and the lower end of which is connected to a piston, wherein the piston is in sealing and sliding cooperation with the chamber up and down to separate the chamber into a first chamber and a second chamber which are isolated from each other from top to bottom; and An elastic member, two ends of which are respectively connected to the vibration absorber and the vibration-damping support; The continuous damping control module comprises: Controller; A plurality of sensors, used for detecting dynamic signals of the vehicle and communicatively connected with the controller; and The actuator comprises an integrated seat and two damping valve groups, wherein the controller and the two damping valve groups are integrated into one body and are both connected to the integrated seat, the damping valve groups are communicatively connected to the controller, and the controller can adjust the opening of the damping valve groups according to the dynamic signal of the vehicle; One end of the first oil pipe is connected to the first chamber of one of the shock absorbers, and the other end is connected to the second chamber of the other shock absorber; one end of the second oil pipe is connected to the second chamber of one of the shock absorbers, and the other end is connected to the first chamber of the other shock absorber; One of the damping valve groups is arranged on the first oil pipe, and the other damping valve group is arranged on the second oil pipe; The shock absorber specifically comprises: A working cylinder, in which the piston is slidably arranged, the piston divides the interior of the working cylinder into an upper chamber and a lower chamber, the outer periphery of the upper chamber is provided with a first oil port, and the outer periphery of the lower chamber is provided with a second oil port; and A liquid storage cylinder is sleeved on the outer circumference of the working cylinder, and the bottom of the liquid storage cylinder is connected to the steering knuckle. A liquid storage chamber and a transition chamber isolated from each other from top to bottom are formed between the liquid storage cylinder and the working cylinder. The liquid storage chamber and the upper chamber constitute the first chamber, and the transition chamber and the lower chamber constitute the second chamber. The first oil port can connect the upper chamber and the liquid storage chamber, and the second oil port can connect the lower chamber and the transition chamber. The outer circumference of the liquid storage cylinder is provided with a first oil inlet and a second oil inlet and a second oil inlet, which are isolated from each other. The first oil inlet and the outlet are connected to the integrated seat through the first oil pipe, and the second oil inlet and the outlet are connected to the integrated seat through the second oil pipe.

2. The active hydraulic interconnected suspension according to claim 1, characterized in that: A dust cover is connected between the working cylinder and the vibration-damping support, and the dust cover is arranged between the inside of the elastic member and the outer periphery of the piston rod.

3. The active hydraulic interconnected suspension according to claim 1, characterized in that: The actuator further comprises a hydraulic pump, wherein the hydraulic pump, the controller and the two damping valve groups are integrated into one body; The oil outlet of the hydraulic pump is connected to the first oil pipe and the second oil pipe respectively.

4. The active hydraulic interconnected suspension according to claim 3, characterized in that: The damping valve group includes two damping valves, one of which is located between the hydraulic pump and the first oil inlet and outlet, and the other of which is located between the hydraulic pump and the second oil inlet and outlet.

5. The active hydraulic interconnected suspension according to claim 1, characterized in that: The active hydraulic interconnected suspension further includes two accumulators, each of which corresponds to the shock absorber one by one, and the accumulators include: The energy storage shell has an oil hole and an air inlet at both ends, the oil hole is connected to the first oil pipe or the second oil pipe, and the air inlet is used to introduce inert gas; A sliding plug is slidably disposed in the energy storage housing, the sliding plug divides the interior of the energy storage housing into an air chamber and an oil chamber, the oil hole is connected to the oil chamber, and the air inlet is connected to the air chamber; a bellows, disposed in the oil chamber, the bellows being filled with hydraulic oil, one end of the bellows being sealedly connected to the outer periphery of the oil hole, the other end of the bellows being connected to the sliding plug, and the interior of the bellows being communicated with the oil hole; and The two ends of the push piece are respectively connected to the two inner ends of the air chamber.

6. The active hydraulic interconnected suspension according to claim 5, characterized in that: The oil chamber and the air chamber are both filled with inert gas; The air inlet hole and the sliding plug are provided with an air vent along the sliding path, and the two ends of the air vent are respectively connected to the oil chamber and the air chamber.

7. The active hydraulic interconnected suspension according to claim 1, characterized in that: The actuator further comprises a warning light, and the warning light is communicatively connected with the controller.

8. The active hydraulic interconnected suspension according to claim 3, characterized in that: The active hydraulic interconnected suspension further includes an oil storage tank, and the oil storage tank is connected to the hydraulic pump through a second oil pipe assembly; The second oil pipe assembly includes two oil filling pipes. The actuator is provided with two switch valves, which correspond to the oil filling pipes one by one. The two switch valves are respectively used to control the opening and closing of the corresponding oil filling pipes.

9. The active hydraulic interconnected suspension according to claim 8, characterized in that: The oil storage tank comprises: An oil storage tank body, an oil storage space is formed inside the oil storage tank body, an oil outlet is opened on the oil storage tank body, the oil outlet is communicated with the oil storage space, the oil outlet is communicated with the hydraulic pump through the oil pipe, and a refueling port is opened on the top of the oil storage tank body; and A fuel filler cap is arranged on the fuel filler opening.

Images