Hydraulic interconnection shock absorber system combined with energy collection
By integrating energy harvesting functions in the hydraulic interconnected suspension, using the combination of hydraulic motors and energy accumulators, the problem of insufficient energy utilization and adaptability of traditional suspension systems is solved, and the dynamic performance and energy efficiency of the vehicle are significantly improved.
Patent Information
- Application Number
- CN202420707629.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-08
AI Technical Summary
Traditional automotive suspension systems cannot effectively utilize energy and lack adaptability when handling body movements, resulting in inefficient dynamic performance and energy use.
A hydraulic interconnected shock absorber system combining energy harvesting is designed. Through the hydraulic circuit composed of four shock absorber cylinders, hydraulic motors, energy accumulators, check valves and pipelines, the hydraulic motors are coupled with the generator to achieve the Energy is collected and stored in high- and low-pressure accumulators, forming two independent hydraulic circuits to enhance the dynamic performance of the system.
Improves the dynamic performance of the vehicle, average lateral acceleration, energy harvesting capacity and rolling dynamic performance, reduces system cost and weight, and achieves higher energy efficiency and vehicle dynamic performance.
Smart Images
Figure CN222271741U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle shock absorption, and in particular to a hydraulic interconnected shock absorber system combined with energy collection. Background Art
[0002] The vehicle body may move in a variety of ways, including roll, pitch and bounce. To address the above problems, traditional automotive suspension systems use isolated shock absorbers that can only dissipate energy in the form of heat.
[0003] By setting up a hydraulic interconnected suspension, each shock absorber oil can be connected through a hydraulic circuit, which can be used to offset unwanted body movement and enhance dynamic performance as a whole. It has good potential in managing body roll and separating pitch mode from other dynamic modes. Some active or semi-active suspension technologies enable shock absorbers to utilize external power input to compensate for the impact of road disturbances, but the hydraulically connected suspension is still passive and lacks adaptability. Based on this, the utility model designs a hydraulically interconnected shock absorber system combined with energy harvesting. Utility Model Content
[0004] The utility model aims to solve the shortcomings in the prior art and proposes a hydraulic interconnected shock absorber system combined with energy collection.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A hydraulic interconnected shock absorber system combined with energy collection includes four shock absorber cylinders, each of which is connected to a hydraulic motor, and each of which is provided with two chambers on the upper and lower sides, and each chamber is connected to two pipelines for hydraulic oil to flow in two directions. The interconnection between the four shock absorber cylinders is separated into two different hydraulic circuits by pipelines, and the two different hydraulic circuits respectively connect the diagonal shock absorber cylinders to each other.
[0007] Preferably, the other ends of the two pipelines are respectively connected to four accumulators, the four accumulators respectively include two high-pressure accumulators and two low-pressure accumulators, and the two different hydraulic circuits are respectively connected to a high-pressure accumulator and a low-pressure accumulator at the same time.
[0008] Preferably, each of the hydraulic motors is connected to a gearbox and coupled to a generator of the vehicle body to form an energy collection unit.
[0009] Preferably, the pipeline is connected to a hydraulic rectifier.
[0010] Preferably, the two pipelines connected to each chamber are respectively connected to a check valve with opposite working directions.
[0011] The present invention proposes a novel energy-harvesting hydraulically interconnected shock absorber system, which integrates energy harvesting capabilities into a passive hydraulically interconnected suspension, while reducing the cost and weight of the entire system, thereby achieving improved dynamic performance and energy efficiency. In this application, the characteristics of combining energy harvesting with hydraulic interconnection provide improved energy efficiency and vehicle dynamics, and can replace traditional anti-roll bars. Compared with traditional suspensions, the average lateral acceleration is increased by 38%, the average energy harvesting capability is increased by 133%, and the anti-roll dynamics are improved by 30% compared with traditional suspensions. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a working schematic diagram of the bouncing action in a hydraulic interconnected shock absorber system combined with energy harvesting proposed by the utility model.
[0013] Figure 2 This is a working schematic diagram of the roll action of a hydraulic interconnected shock absorber system combined with energy collection proposed in the utility model.
[0014] Figure 3 This is a schematic diagram of the working of the pitch and bounce operation of a hydraulic interconnected shock absorber system combined with energy collection proposed by the utility model.
[0015] In the figure: 1 shock absorber cylinder, 2 energy collection unit, 3 high-pressure accumulator, 4 low-pressure accumulator, 5 check valve, 6 pipeline. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0017] like Figure 1-3As shown, a hydraulic interconnected shock absorber system combined with energy collection includes four shock absorber cylinders 1, each of which is connected to a hydraulic motor, each of which is connected to a gearbox and coupled to a generator of a vehicle body, thereby forming an energy collection unit 2, and each shock absorber 1 is connected to two pipes 6, the two pipes 6 are respectively connected to accumulators, and the two accumulators are divided into a high-pressure accumulator 3 and a low-pressure accumulator 4, and the energy collection unit 2 and the two accumulators (high-pressure accumulator 3 and low-pressure accumulator 4) form each circuit on both sides of the energy collection unit 2, so that the interconnection between the four shock absorber cylinders 1 is separated into two different hydraulic circuits. The two different hydraulic circuits respectively connect the diagonal shock absorber cylinders 1 to each other, thereby converting the bidirectional hydraulic fluid into a unidirectional flow, and a high-pressure accumulator 3 and a low-pressure accumulator 4 are used on both sides of the hydraulic motor to reduce the fluctuation of the fluid flow, so that the speed of the hydraulic motor is kept in a state close to the constant speed, and these fluctuations of the fluid flow are caused by the hydraulic rectifier.
[0018] In the utility model, there are 4 shock absorber cylinders 1, 16 check valves 5, two low-pressure accumulators 3, two high-pressure accumulators 4 and connected with 2 energy collection units 2 to form an integrated hydraulic system. The above hydraulic system is connected through a pipeline 6, and the hydraulic motor and the gear box of the vehicle body are part of the energy collection unit 2, which are connected to the generator and the corresponding external circuit. The diagonally opposite shock absorber cylinders 1 are connected to each other to form two different closed hydraulic circuits. Since the shock absorber cylinders 1 are diagonally connected to the energy collection unit 2, flow can be obtained during the pitch and roll motions of the vehicle.
[0019] During specific operation, the bounce motion, roll motion and pitch motion of the energy harvesting hydraulic interconnected shock absorber system are respectively as follows: Figure 1 , 2 and 3.
[0020] The vehicle is in a bouncing motion. Figure 1 As shown, when the suspension bounces, all four shock absorber cylinders 1 are compressed. The oil flows from the high-pressure chamber of shock absorber cylinder 1 through two hydraulic motors into the low-pressure chamber of the diagonally opposite shock absorber cylinder 1. The accumulator delivers oil to reduce the change in flow rate, and the hydraulic oil generates electrical energy through a hydraulic motor connected to a generator.
[0021] Working mode in roll motion Figure 2As shown, due to the tilt to one side, the car tilts when turning, the shock absorber cylinder 1 located on the outside is compressed, and the shock absorber cylinder 1 located on the inside expands under the roll action, so that the oil flows from the high-pressure chamber of the shock absorber cylinder 1 to the corresponding hydraulic motor. After passing through the hydraulic motor, this high-pressure liquid enters the low-pressure chamber in the shock absorber cylinder 1 on the diagonally opposite side. Due to the inertia of the hydraulic motor, the extension and contraction of the shock absorber cylinder 1 is slowed down and a damping effect is provided, thereby achieving better anti-roll performance.
[0022] The working mode in pitch motion is as follows Figure 3 As shown, the movement of the vehicle under braking conditions causes the compression of the front two shock absorber cylinders 1 and the extension of the rear two shock absorber cylinders 1, which results in the pitching movement of the vehicle body. The high-pressure fluid from the upper chambers of the front two shock absorber cylinders 1 enters the chambers on the lower side of the diagonally opposite shock absorber cylinders 2 through the hydraulic motor. The inertia generated by the hydraulic motor limits the flow in the hydraulic middle pipe 6, thereby helping to improve the vehicle dynamics. Under braking conditions, the front two shock absorber cylinders 1 of the vehicle are compressed, while the rear two shock absorber cylinders 1 are extended. As a result, the vehicle body tilts. The hydraulic motor causes the high-pressure fluid to enter the lower chambers of the diagonally opposite shock absorber cylinders 1 from the upper chambers of the front two shock absorber cylinders 1. The inertia of the hydraulic motor limits the flow of hydraulic fluid in the pipe 6, thereby enhancing the dynamics of the vehicle.
[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A hydraulic interconnected shock absorber system combined with energy harvesting, characterized in that: The invention comprises four shock absorber cylinders (1), each of which is connected to a hydraulic motor, and each of which is provided with two chambers on the upper and lower sides, and each chamber is connected to two pipelines (6) for hydraulic oil to flow in two directions, and the interconnection between the four shock absorber cylinders (1) is separated into two different hydraulic circuits through the pipelines (6), and the two different hydraulic circuits respectively connect the diagonal shock absorber cylinders (1) to each other.
2. A hydraulic interconnected shock absorber system combined with energy harvesting according to claim 1, characterized in that: The other ends of the two pipelines (6) are respectively connected to four accumulators, the four accumulators respectively comprising two high-pressure accumulators (3) and two low-pressure accumulators (4), and two different hydraulic circuits are respectively simultaneously connected to a high-pressure accumulator (3) and a low-pressure accumulator (4).
3. A hydraulic interconnected shock absorber system combined with energy harvesting according to claim 1, characterized in that: Each of the hydraulic motors is connected to a gearbox and coupled to a generator of the vehicle body and constitutes an energy collection unit (2).
4. A hydraulic interconnected shock absorber system combined with energy harvesting according to claim 1, characterized in that: The pipeline (6) is connected to a hydraulic rectifier.
5. A hydraulic interconnected shock absorber system combined with energy harvesting according to claim 1, characterized in that: The two pipelines (6) connected to each chamber are respectively connected to a check valve (5) with opposite working directions.