Cross type hydraulic interconnection energy feedback suspension device

Abstract

A crossed type hydraulic interconnection energy feedback suspension device comprises a vibration reduction hydraulic cylinder CI, a vibration reduction hydraulic cylinder CII, a vibration reduction hydraulic cylinder CIII and a vibration reduction hydraulic cylinder CIV which are crossed and interconnected, energy feedback assemblies are arranged at the positions corresponding to the vibration reduction hydraulic cylinders, and the energy feedback assemblies comprise the energy feedback assembly P1, the energy feedback assembly PII, the energy feedback assembly PIII and the energy feedback assembly PIV; any one energy feedback assembly comprises a one-way valve V1 and a one-way valve V2 which are consistent in direction and are connected in series to form a valve A, a one-way valve V3 and a one-way valve V4 which are consistent in direction and are connected in series to form a valve B, a full-bridge rectifier, a variable pump, a generator, a variable resistor and an inductor, and the valve A and the valve B are connected in parallel and are connected with the variable pump in series; the valve A is connected with a port A of the energy feedback assembly, and a connecting pipeline between the one-way valve V3 and the one-way valve V4 is connected with a port B of the energy feedback assembly; the variable pump is connected with the generator which is connected in series with the variable resistor and the inductor. According to the utility model, the stability of the vehicle can be enhanced while the anti-pitching and anti-roll functions are realized, and the energy recycling rate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile engineering, and specifically relates to a cross type hydraulic interconnection energy feedback suspension device. BACKGROUND

[0002] With the increase of the automobile ownership, traffic safety accidents occur frequently, and the death toll caused by vehicle rollover accidents accounts for a high proportion. Improving the anti-roll performance of vehicles becomes a key way to reduce the death rate of traffic accidents and protect people's life and property safety. The traditional suspension system plays an important role in connecting the vehicle body and the wheels, attenuating impact and vibration, reducing the roll angle and pitch angle of the vehicle during driving, so as to ensure the driving smoothness and steering stability of the vehicle. However, the traditional suspension still has certain limitations when facing complex road conditions and driving conditions. The interconnection suspension has obvious advantages in improving the anti-rollover and anti-pitch performance of vehicles due to its structural characteristics, and can keep the vehicle body relatively stable under complex conditions.

[0003] The interconnection suspension is mainly divided into mechanical interconnection suspension, hydraulic interconnection suspension and electrical interconnection suspension according to the connection mode. The hydraulic interconnection suspension has many advantages over the other two suspensions. Firstly, in terms of performance adjustment, it can independently and accurately adjust the stiffness and damping, and has strong motion modal decoupling capability. Secondly, in terms of shock absorption, it has excellent shock absorption capability and good filtering performance for high-frequency vibration. Thirdly, it has strong load-carrying capacity and high reliability, is suitable for various vehicles, and performs better in harsh environments. Fourthly, it has energy recovery potential and can improve energy utilization efficiency. The performance of the hydraulic interconnection suspension is related to the connection mode. The front-rear interconnection can optimize the anti-pitch performance, the left-right interconnection can enhance the anti-roll performance, and the forward or reverse interconnection can improve the driving stability. A single connection mode cannot realize the anti-pitch and anti-roll functions at the same time, and the interconnection suspension with switching mode is too complex. The cross type hydraulic interconnection suspension can realize the anti-pitch and anti-roll functions at the same time, but it does not have the function of handling the stability problem caused by different strokes of the four wheels, and does not have the function of energy recovery and utilization. SUMMARY

[0004] The utility model aims at providing a cross type hydraulic interconnection energy feedback suspension device, which can realize the anti-pitch and anti-roll functions at the same time, strengthen the stability of the vehicle, and improve the energy recovery and utilization rate.

[0005] In order to solve the above technical problems, the utility model adopts the specific scheme of a cross type hydraulic interconnection energy feedback suspension device: including cross interconnection shock absorption hydraulic cylinders C I, shock absorption hydraulic cylinders C II, shock absorption hydraulic cylinders C III and shock absorption hydraulic cylinders C IV, and energy feedback assemblies are arranged at positions corresponding to the shock absorption hydraulic cylinders C I, the shock absorption hydraulic cylinders C II, the shock absorption hydraulic cylinders C III and the shock absorption hydraulic cylinders C IV on the cross connection hydraulic branch pipeline; the energy feedback assemblies include energy feedback assemblies P I, energy feedback assemblies P II, energy feedback assemblies P III and energy feedback assemblies P IV.

[0006] Energy feeding components PI, PII, PIII and PIV all include a full-bridge rectifier, a variable pump, a generator, a variable resistor and an inductor connected through several pipelines. The full-bridge rectifier includes a one-way valve V1, a one-way valve V2, a one-way valve V3 and a one-way valve V4. The one-way valve V1 and the one-way valve V2 are in the same direction and are connected in series to form valve A. The one-way valve V3 and the one-way valve V4 are in the same direction and are connected in series to form valve B. Valve A and valve B are connected in parallel and in series with the variable pump; the connecting pipeline between the one-way valve V1 and the one-way valve V2 is connected to the A port of the energy feeding component, and the connecting pipeline between the one-way valve V3 and the one-way valve V4 is connected to the B port of the energy feeding component; the variable pump is connected to the generator, and the generator is connected in series with the variable resistor and the inductor.

[0007] As another optimization scheme of the above-mentioned cross-type hydraulic interconnected energy feedback suspension device: the energy feedback component PⅠ is connected to the rodless upper cavity of the shock-absorbing hydraulic cylinder CⅠ, the energy feedback component PⅡ is connected to the rodless upper cavity of the shock-absorbing hydraulic cylinder CⅡ, the energy feedback component PⅢ is connected to the rodless upper cavity of the shock-absorbing hydraulic cylinder CⅢ, and the energy feedback component PⅣ is connected to the rodless upper cavity of the shock-absorbing hydraulic cylinder CⅣ.

[0008] As another optimization scheme of the above-mentioned cross-type hydraulic interconnected energy feeding suspension device: the lower chamber of the rod of the shock-absorbing hydraulic cylinder CⅠ is connected with the accumulator DⅠ and the energy feeding component PⅢ through a hydraulic branch pipe, the lower chamber of the rod of the shock-absorbing hydraulic cylinder CⅡ is connected with the accumulator DⅡ and the energy feeding component PⅣ through a hydraulic branch pipe, the lower chamber of the rod of the shock-absorbing hydraulic cylinder CⅢ is connected with the accumulator DⅢ and the energy feeding component PⅠ through a hydraulic branch pipe, and the lower chamber of the rod of the shock-absorbing hydraulic cylinder CⅣ is connected with the accumulator DⅣ and the energy feeding component PⅡ through a hydraulic branch pipe.

[0009] As another optimization solution for the above-mentioned cross-type hydraulic interconnected energy-feeding suspension device: the variable pump is a hydraulic pump.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The eight chambers of the four damping hydraulic cylinders of the present invention are interconnected via four oil circuits, enabling the suspension system to maintain good stability under vertical, roll, pitch, and warp motions. Furthermore, the adjustable energy-feeding components in the four hydraulic oil circuits, through a full-bridge rectifier, ensure that hydraulic oil flows from the variable pump inlet and always flows out from the variable pump outlet, thereby ensuring that the generator rotates in one direction and achieving energy feeding. Furthermore, the energy-feeding components can continuously adjust the system's damping by adjusting the arrangement of the hydraulic variable motors in the variable pump and the resistance of the variable resistor, achieving semi-active control of the suspension system. This improves energy recovery while ensuring the stability and comfort of the suspension system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is a schematic structural diagram of the energy feedback component of the present invention;

[0014] Figure 3 This is a schematic diagram of the flow direction of the hydraulic oil when the vehicle body moves vertically in the present invention;

[0015] Figure 4 This is a schematic diagram of the flow direction of the hydraulic oil when the vehicle body rolls in the present invention;

[0016] Figure 5 This is a schematic diagram of the flow direction of the hydraulic oil when the vehicle body is in pitching motion;

[0017] Figure 6 This is a schematic diagram of the flow direction of the hydraulic oil when the vehicle body is warping.

[0018] Figure markings: 1. Shock-absorbing hydraulic cylinder CⅠ, 101. Accumulator DⅠ, 2. Shock-absorbing hydraulic cylinder CⅡ, 201. Accumulator DⅡ, 3. Shock-absorbing hydraulic cylinder CⅢ, 301. Accumulator DⅢ, 4. Shock-absorbing hydraulic cylinder CⅣ, 401. Accumulator DⅣ, 5. Hydraulic oil circuit OⅠ, 6. Hydraulic oil circuit OⅡ, 7. Hydraulic oil circuit OⅢ, 8. Hydraulic oil circuit OⅣ, 9. Energy feeding component, 901. Energy feeding component PⅠ, 902. Energy feeding component PⅡ, 903. Energy feeding component PⅢ, 904. Energy feeding component PⅣ, 905. Energy feeding component A port, 906. Energy feeding component B port, 91. One-way valve V1, 92. One-way valve V2, 93. One-way valve V3, 94. One-way valve V4, 95. Variable pump, 96. Generator, 97. Variable resistor, 98. Inductor. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further elaborated in detail below in conjunction with specific embodiments. Parts not described in detail in the following embodiments of the present invention, such as the specifications and models of the accumulator and the variable pump, should be immediately known to those skilled in the art or should be known to the prior art.

[0020] A cross-type hydraulic interconnected energy-feeding suspension device, such as Figure 1As shown, it includes a shock-absorbing hydraulic cylinder CⅠ1, a shock-absorbing hydraulic cylinder CⅡ2, a shock-absorbing hydraulic cylinder CⅢ3, a shock-absorbing hydraulic cylinder CⅣ4, an accumulator DⅠ101, an accumulator DⅡ201, an accumulator DⅢ301, an accumulator DⅣ401 and an energy feeding component 9. The shock-absorbing hydraulic cylinder CⅠ1 and the shock-absorbing hydraulic cylinder CⅡ2 are arranged side by side on the upper side, and the shock-absorbing hydraulic cylinder CⅢ3 and the shock-absorbing hydraulic cylinder CⅣ4 are arranged side by side on the lower side. Among them, the shock-absorbing hydraulic cylinder CⅠ1 and the shock-absorbing hydraulic cylinder CⅣ4 are distributed in a row, and the shock-absorbing hydraulic cylinder CⅡ2 and the shock-absorbing hydraulic cylinder CⅢ3 are distributed in a row.

[0021] Energy feed assembly 9 includes energy feed assembly PI901, energy feed assembly PI902, energy feed assembly PIII903, and energy feed assembly PIV904. The rodless upper chamber of the damping hydraulic cylinder CI1 is connected to the energy feed assembly PI901 via a hydraulic pipeline, while the rodded lower chamber of the damping hydraulic cylinder CI1 is connected to the accumulator DⅠ101 via a hydraulic pipeline. The rodless upper chamber of the damping hydraulic cylinder CⅢ3 is connected to the energy feed assembly PⅢ903 via a hydraulic pipeline, while the rodded lower chamber of the damping hydraulic cylinder CⅢ3 is connected to the accumulator DⅢ301 via a hydraulic pipeline. Energy feed assembly PI901 and accumulator DⅢ301 cross-connect to form hydraulic oil circuit OⅠ5, while energy feed assembly PⅢ903 and accumulator DⅠ101 cross-connect to form hydraulic oil circuit OⅣ8.

[0022] The rodless upper chamber of the damping hydraulic cylinder CⅡ2 is connected to the energy feed assembly PⅡ902 via a hydraulic pipeline, while the rodded lower chamber of the damping hydraulic cylinder CⅡ2 is connected to the accumulator DⅡ201 via a hydraulic pipeline. The rodless upper chamber of the damping hydraulic cylinder CⅣ4 is connected to the energy feed assembly PⅣ904, while the rodded lower chamber of the damping hydraulic cylinder CⅣ4 is connected to the accumulator DⅣ401. The energy feed assembly PⅡ902 and the accumulator DⅣ401 cross-connect to form hydraulic circuit OⅡ6, while the energy feed assembly PⅣ904 and the accumulator DⅡ201 cross-connect to form hydraulic circuit OⅢ7.

[0023] Further, such as Figure 2 As shown, each energy feed assembly 9 includes a full-bridge rectifier, a variable pump 95, a generator 96, a variable resistor 97, and an inductor 98, all connected in sequence via several pipelines. The full-bridge rectifier includes one-way valves V191, V292, V393, and V494. The one-way valves V191 and V292 flow in the same direction and are connected in series to form valve A. The one-way valves V393 and V494 flow in the same direction and are connected in series to form valve B. Valves A and B are connected in parallel and in series with the variable pump 95. The connecting pipeline between the one-way valves V191 and V292 is connected to port A 905 of the energy feed assembly, while the connecting pipeline between the one-way valves V393 and V494 is connected to port B 906 of the energy feed assembly. The variable pump 95 in the figure is a hydraulic pump. The hydraulic motor in the variable pump 95 is connected to the generator 96. The generator 96E is connected in series with the variable resistor 97 and the inductor 98.

[0024] If the hydraulic oil flows into the energy feeding component 9 from the energy feeding component A port 905, the one-way valve V191 and the one-way valve V494 are closed, the one-way valve V292 and the one-way valve V393 are opened, and the hydraulic oil enters the variable pump 95 through the hydraulic motor inlet in the variable pump 95 through the one-way valve V191. The hydraulic motor rotates under the pressure difference between the two chambers, driving the generator 96E to rotate. At the same time, the hydraulic oil flows out from the hydraulic motor outlet of the variable pump 95 and flows out of the energy feeding component 9 from the energy feeding component B port 906 through the one-way valve V393.

[0025] If the hydraulic oil flows into the energy feeding component 9 from the B port 906 of the energy feeding component, the one-way valve V292 and the one-way valve V393 are closed, and the one-way valve V191 and the one-way valve V494 are opened. The hydraulic oil enters the variable pump 95 through the hydraulic motor inlet in the variable pump 95 through the one-way valve V494. The hydraulic motor rotates under the pressure difference between the two chambers, driving the generator 96E to rotate. At the same time, the hydraulic oil flows out from the outlet of the hydraulic motor and flows out of the energy feeding component 9 from the A port 905 of the energy feeding component through the one-way valve V191.

[0026] Therefore, no matter whether the hydraulic oil flows into the energy feeding component 9 from the energy feeding component A port 905 or flows into the energy feeding component 9 from the energy feeding component B port 906, under the action of the full-bridge rectifier, it can ensure that the hydraulic oil flows in from the hydraulic motor inlet and flows out from the hydraulic motor outlet, thereby making the hydraulic motor always rotate in one direction to drive the generator 96 to generate electricity, thereby realizing energy recovery and utilization.

[0027] Furthermore, the charging terminal in the energy-feeding component 9 circuit is equivalent to a variable resistor 97. By adjusting the load resistor in the energy-feeding component 9 circuit, the induced current in generator 96 is correspondingly altered, thereby adjusting the electromagnetic resistance torque of generator 96. This allows the full-bridge rectifier to have continuously adjustable damping, thus enabling control as a semi-active suspension system. The hydraulic motor variable mechanism controls the speed of generator 96 and the current in the constant-current energy-feeding circuit, adjusting system damping, ensuring system stability, and improving energy recovery efficiency.

[0028] The following describes the suspension system in terms of vertical motion, roll motion, pitch motion, and warping motion:

[0029] like Figure 3As shown, when the suspension system is in vertical motion, the four wheels of the vehicle are excited by the road surface in the same direction and experience the same motion state. When the four damping hydraulic cylinders are compressed, the piston rods in the lower chambers of each damping hydraulic cylinder move upward, pushing the hydraulic oil in the upper chambers of the damping hydraulic cylinders into the variable displacement pump 95, which then drives the generator 96 through the hydraulic motor to rotate and generate electricity. The hydraulic oil flowing out of the hydraulic motor replenishes the lower chambers of the diagonally connected damping hydraulic cylinders. Due to the presence of the piston rods, there is a volume difference between the upper and lower chambers of the damping hydraulic cylinders. Some of the hydraulic oil flows into the corresponding accumulators, compressing the gas and causing a slight increase in the suspension system pressure, but this has little impact on the vehicle's vertical stiffness.

[0030] When the four shock-absorbing hydraulic cylinders are stretched, the hydraulic oil in the lower chamber of the rod of each shock-absorbing hydraulic cylinder is pushed into the variable pump 95 by the piston rod, and the generator 96 is driven by the hydraulic motor to rotate and generate electricity. The hydraulic oil flowing out of the hydraulic motor replenishes the rodless upper chamber of the diagonal shock-absorbing hydraulic cylinder connected to it. At this time, the corresponding connected accumulator can release hydraulic oil to compensate for the oil volume of the suspension system.

[0031] like Figure 4 As shown, during a roll motion of the suspension system, for example, when the vehicle turns right, the vehicle body tilts to the left under the action of centripetal force. The outer damping hydraulic cylinders CⅠ1 and CⅣ4 are compressed, while the inner damping hydraulic cylinders CⅡ2 and CⅢ3 are stretched. Hydraulic oil flows out of the rodless upper chambers of the two outer damping hydraulic cylinders and the rodded lower chambers of the two inner damping hydraulic cylinders, respectively, passing through energy feedback components PⅠ901 and PⅣ904, causing the hydraulic motor to rotate and drive generator 96 to generate electricity. Simultaneously, the pressure in accumulators DⅡ201 and DⅢ301 increases, and the pressure in hydraulic oil lines OⅠ5 and OⅢ7, as well as in the chambers connected to them, increases.

[0032] Hydraulic oil flows from accumulators DI101 and DIV401, passing through energy feedback components PI901 and PIV904, causing the hydraulic motor to rotate and drive generator 96 to generate electricity. This oil then flows into the rod-loaded lower chambers of the two outer damping hydraulic cylinders and the rodless upper chambers of the two inner damping hydraulic cylinders. This reduces the pressure in accumulators DI201 and DIII301, and in hydraulic circuits OII6 and OIV8, as well as the chambers connected to them. Consequently, the pressure differential between hydraulic circuits OII5 and OIII7, and between hydraulic circuits OII6 and OIV8, generates a counter-torque to counteract the vehicle's roll motion and reduce understeer. Furthermore, while energy feedback component 9 is operating to recover energy, it also generates an additional damping force to prevent further extension of the right hydraulic cylinder, further enhancing the vehicle's lateral stability and reducing the tendency for the vehicle to roll.

[0033] like Figure 5As shown, when the suspension system is in pitching motion, taking the vehicle in linear braking state as an example, under the action of inertia force, the two front wheel shock absorbing hydraulic cylinders CⅠ1 and the shock absorbing hydraulic cylinders CⅡ2 are compressed, and the two rear wheel shock absorbing hydraulic cylinders CⅢ3 and the shock absorbing hydraulic cylinders CⅣ4 are stretched. The hydraulic oil in the rodless upper chambers of the two front wheel shock absorbing hydraulic cylinders generates electricity through the energy feeding component 9, and after flowing out of the energy feeding component 9, is pressed into the accumulator DⅣ401 and the accumulator DⅢ301 respectively. The hydraulic oil in the rod lower chambers of the two rear wheel shock absorbing hydraulic cylinders is pressed into the accumulator DⅣ401 and the accumulator DⅢ301 respectively. The pressure of accumulator DⅢ301 and accumulator DⅣ401 increases, and the pressure of the hydraulic oil circuit OⅠ5 and the hydraulic oil circuit OⅡ6 and the chambers connected thereto increases.

[0034] Hydraulic fluid flows from accumulators DⅠ101 and DⅡ201, entering the rod-loaded lower chambers of the two front wheel hydraulic cylinders, respectively. Simultaneously, it passes through the energy feedback assembly 9 and enters the rodless upper chambers of the two rear wheel damping hydraulic cylinders. This reduces the pressure in accumulators DⅠ101 and DⅡ201, and the pressure in hydraulic lines OⅣ8 and OⅢ7, as well as the chambers connected to them. Consequently, the pressure differential between hydraulic lines OⅣ8 and OⅢ7 generates a counter-torque to resist the pitching motion of the vehicle. The energy feedback assembly 9 intervenes and generates a damping force, hindering further extension of the rear wheels. This suppresses the pitching motion of the vehicle and enhances its longitudinal stability.

[0035] like Figure 6 As shown, in the case of warping motion of the suspension system, for example, the left front wheel vibration damping hydraulic cylinder CⅠ1 and the right rear wheel vibration damping hydraulic cylinder CⅢ3 of the vehicle are compressed, and the right front wheel vibration damping hydraulic cylinder CⅡ2 and the left rear wheel vibration damping hydraulic cylinder CⅣ4 are stretched. At this time, the interconnection structure itself cannot passively form a reaction force to resist this motion. The variable resistor 97 in the energy feedback component 9 can be adjusted to generate a damping force to hinder the movement of each vibration damping hydraulic cylinder. Therefore, the overall adhesion of the tire to the road will not fluctuate significantly, thereby ensuring that the tire still has good contact with the ground in the warping motion mode and enhancing vehicle stability.

Claims

1. A cross-type hydraulic interconnected energy-feeding suspension device, comprising a cross-connected damping hydraulic cylinder CI (1), a damping hydraulic cylinder CII (2), a damping hydraulic cylinder CIII (3), and a damping hydraulic cylinder CIV (4), characterized in that: Energy feeding components (9) are provided at positions corresponding to the vibration-reducing hydraulic cylinder CⅠ (1), the vibration-reducing hydraulic cylinder CⅡ (2), the vibration-reducing hydraulic cylinder CⅢ (3), and the vibration-reducing hydraulic cylinder CⅣ (4) on the cross-connected hydraulic branch pipelines. The energy feeding components (9) include energy feeding components PⅠ (901), energy feeding components PⅡ (902), energy feeding components PⅢ (903), and energy feeding components PⅣ (904); The energy feeding component PⅠ (901), the energy feeding component PⅡ (902), the energy feeding component PⅢ (903), and the energy feeding component PⅣ (904) all include a full-bridge rectifier, a variable pump (95), a generator (96), a variable resistor (97), and an inductor (98) connected through a plurality of pipelines. The full-bridge rectifier includes a one-way valve V1 (91), a one-way valve V2 (92), a one-way valve V3 (93), and a one-way valve V4 (94). The one-way valve V1 (91) and the one-way valve V2 (92) have the same direction and are connected in series to form valve A. The one-way valve V3 (93) and the one-way valve V4 (94) are in the same direction and are connected in series to form valve B. Valve A and valve B are connected in parallel and in series with the variable pump (95). The connecting pipeline between the one-way valve V1 (91) and the one-way valve V2 (92) is connected to the A port (905) of the energy feeding component. The connecting pipeline between the one-way valve V3 (93) and the one-way valve V4 (94) is connected to the B port (906) of the energy feeding component. The variable pump (95) is connected to the generator (96), and the generator (96) is connected in series with the variable resistor (97) and the inductor (98).

2. The cross-type hydraulic interconnected energy-feeding suspension device according to claim 1, characterized in that: The energy feeding component PⅠ (901) is connected to the rodless upper cavity of the vibration damping hydraulic cylinder CⅠ (1), the energy feeding component PⅡ (902) is connected to the rodless upper cavity of the vibration damping hydraulic cylinder CⅡ (2), the energy feeding component PⅢ (903) is connected to the rodless upper cavity of the vibration damping hydraulic cylinder CⅢ (3), and the energy feeding component PⅣ (904) is connected to the rodless upper cavity of the vibration damping hydraulic cylinder CⅣ (4).

3. The cross-type hydraulic interconnected energy-feeding suspension device according to claim 2, characterized in that: The lower chamber of the rod of the damping hydraulic cylinder CⅠ(1) is connected to the accumulator DⅠ(101) and the energy feedback component PⅢ(301) through a hydraulic branch pipe. The lower chamber of the rod of the damping hydraulic cylinder CⅡ(2) is connected to the accumulator DⅡ(201) and the energy feedback component PⅣ(904) through a hydraulic branch pipe. The lower chamber of the rod of the damping hydraulic cylinder CⅢ(3) is connected to the accumulator DⅢ(301) and the energy feedback component PⅠ(901) through a hydraulic branch pipe. The lower chamber of the rod of the damping hydraulic cylinder CⅣ(4) is connected to the accumulator DⅣ(401) and the energy feedback component PⅡ(902) through a hydraulic branch pipe.

4. The cross-type hydraulic interconnected energy-feeding suspension device according to claim 1, characterized in that: The variable displacement pump (95) is a hydraulic pump.

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