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JP-7856770-B2 - Hydraulic active suspension and vehicles having the same

JP7856770B2JP 7856770 B2JP7856770 B2JP 7856770B2JP-7856770-B2

Inventors

  • ▲許▼豪▲倫▼
  • 廖▲銀▼生
  • ▲張▼宏洲
  • 黄泰▲碩▼
  • ▲張▼蕾

Assignees

  • ビーワイディー カンパニー リミテッド

Dates

Publication Date
20260511
Application Date
20221230
Priority Date
20211230

Claims (6)

  1. A hydraulic active suspension for use in a vehicle, comprising a damper, a common passage, an accumulator module, and a reservoir, wherein the damper has a housing, a piston, and a piston rod, the housing is configured to be connected to a wheel or axle, the piston is located within the housing and defines an upper chamber and a lower chamber of the damper, one end of the piston rod is connected to the piston, and the other end of the piston rod extends from the housing and is configured to be connected to the vehicle body, the reservoir and the accumulator module both communicate with the lower chamber via the common passage, the reservoir adjusts the height of the vehicle, and the accumulator module adjusts at least one of the stiffness and damping of the damper. The first end of the common passage is in communication with the lower chamber, The second end of the common passage is in communication with the reservoir, and a module connection point is provided in the common passage. The module connection point is located between the first end and the second end and connects the accumulator modules. The module connection point includes the first connection point, The accumulator module includes a first accumulator and a second control valve, The first accumulator is in communication with the first connection point, and the second control valve is provided between the first connection point and the lower chamber. The second control valve is one of a shut-off valve and a shut-off adjustment valve, If the second control valve is a shut-off valve, adjust its rigidity. If the second control valve is the shut-off adjustment valve, it adjusts the rigidity and damping of the damper. The aforementioned module connection point further includes a second connection point, The accumulator module includes a second accumulator and a third control valve. The second accumulator communicates with the second connection point, The third control valve is provided between the second accumulator and the second connection point, and can selectively communicate the second accumulator and the second connection point. A fourth control valve is provided between the first connection point and the second connection point. A hydraulic active suspension system characterized by the following features.
  2. The hydraulic active suspension according to claim 1, characterized in that a first control valve is provided in the common passage between the second end and the module connection point.
  3. The hydraulic active suspension according to claim 1 , characterized in that the first connection point is provided on the side of the second connection point that is away from the second end.
  4. The hydraulic active suspension according to claim 1, characterized in that the damper is a front axle damper, a third connection point is provided between the module connection point and the first end, and the hydraulic active suspension further includes a third accumulator communicating with the third connection point.
  5. The hydraulic active suspension according to claim 1, wherein the damper is a rear axle damper, the module connection point further includes a third connection point located between the first connection point and the second connection point, and the accumulator module includes a third accumulator communicating with the third connection point.
  6. A vehicle characterized by including a hydraulic active suspension as described in any one of claims 1 to 5 .

Description

(Cross-reference of related applications) This application is based on and claims priority from the Chinese patent application filed on December 30, 2021, application number 202123435005.1, all of which are incorporated herein by reference. This application relates to the field of vehicles, and more particularly to hydraulic active suspension and vehicles having the same. The suspension is a device that transmits the interaction forces between the vehicle body and the axles. It is one of the four main components of an automobile and a crucial element that affects the vehicle's driving performance. The suspension transmits the forces and moments fed back from the road surface, dampens wheel vibrations, mitigates shocks, and improves the driver's experience, thereby enabling the vehicle to achieve ideal dynamic characteristics and stable driving capabilities. Related suspension technologies often consist of springs, guide mechanisms, and dampers. However, dampers typically have constant damping coefficients and spring stiffness, making it difficult to achieve both comfort and handling stability. This is a schematic diagram of a hydraulic active suspension according to an embodiment of the present invention.This is a schematic diagram of a damper according to an embodiment of the present invention. The embodiments of this application will be described in detail below. Examples of these embodiments are shown in the drawings, and throughout, identical or similar reference numerals indicate identical or similar parts, or parts having identical or similar functions. The embodiments described below with reference to the drawings are illustrative only and are for interpreting this application, and should not be understood as limiting it. Referring to Figures 1 and 2, the hydraulic active suspension 1000 according to an embodiment of the present invention will be described. The hydraulic active suspension 1000 is used in a vehicle, is mounted on the vehicle body, and is further connected to the wheels or axles. As shown in Figures 1 and 2, the hydraulic active suspension 1000 according to an embodiment of the present invention includes a damper 200, a common passage, an accumulator module, and a reservoir. The damper 200 has a housing 201, a piston 202, and a piston rod 203. The housing 201 is configured to be connected to a wheel or axle. The piston 202 is located within the housing 201 and defines the upper chamber 2011 and the lower chamber 2012 of the damper 200. One end of the piston rod 203 is connected to the piston 202, and the other end of the piston rod 203 extends from the housing 201 and is configured to be connected to the vehicle body. The reservoir and the accumulator module both communicate with the lower chamber 2012 via a common passage. The reservoir adjusts the vehicle body height, and the accumulator module adjusts at least one of the stiffness and damping of the damper 200. Specifically, the reservoir communicates with the lower chamber 2012 via a common passage, and the accumulator module also communicates with the lower chamber 2012 via the same common passage. That is, the flow path between the reservoir and the lower chamber 2012 overlaps with the flow path between the accumulator module and the lower chamber 2012. In other words, the conduit for adjusting the vehicle height overlaps with the conduit for adjusting rigidity and damping. This common passage not only allows for adjustment of the vehicle height but also enables adjustment of at least one of the rigidity and damping. Therefore, the number of connecting conduits is reduced, the overall structure of the hydraulic active suspension 1000 is made more compact, and installation in the vehicle space is facilitated. Furthermore, to make it clearer, the oil in the reservoir can enter the lower chamber 2012 through the common passage, and when the volume of the lower chamber 2012 decreases due to the downward movement of the piston rod 203, the oil in the lower chamber 2012 can also be discharged into the reservoir through the common passage. Specifically, the hydraulic active suspension 1000 has a lift mode and a height reduction mode. In lift mode, the oil from the reservoir can enter the common passage. The hydraulic oil entering the common passage flows into the lower chamber 2012, increasing the hydraulic pressure in the lower chamber 2012 and moving the piston 202 upward. This upward movement of the piston 202 then moves the piston rod 203 upward, achieving the objective of lifting the vehicle body. In height reduction mode, oil can flow out of the lower chamber 2012 and through the common passage to the reservoir. The hydraulic pressure in the lower chamber 2012 of the damper 200 decreases, moving the piston 202 downwards. This downward movement of the piston 202 moves the piston rod 203 downwards, thereby moving the vehicle body downwards and achieving the objective of reducing the vehicle's height. Vehicles encounter various road