Zero-gravity seat system, control method, control device and vehicle thereof

Abstract

This application relates to the technical field of zero-gravity seats and discloses a zero-gravity seat system comprising a seat base frame and a magnetorheological hydraulic cylinder. The cylinder cavity of the magnetorheological hydraulic cylinder is filled with magnetorheological fluid, the cylinder body is mounted on a movable slide rail of the seat base frame, and the piston rod is connected to the seat base frame's tilt drive arm. When the piston rod of the magnetorheological hydraulic cylinder extends, it drives the front side of the base frame upward, causing the seat to unfold; when the piston rod retracts, it drives the front side of the base frame downward, causing the seat to retract. Applying a magnetorheological hydraulic cylinder with variable damping magnetorheological fluid to a zero-gravity vehicle seat allows for more flexible and rapid seat adjustment. Furthermore, it achieves a better passive restraint protection in the zero-gravity position than in a normal seating position, expanding the use cases of the zero-gravity seat and improving the user experience. This application also discloses a control method, control device, and vehicle for the zero-gravity seat system.

Description

Technical Field

[0001] The present application relates to the technical field of zero-gravity seats, for example, to a zero-gravity seat system and a control method, a control device and a vehicle thereof. Background Art

[0002] With the rapid development of the automotive industry, users are increasingly demanding more functional features from their vehicles. Zero-gravity seats are one such feature that is gradually gaining acceptance and popularity in response to these demands. However, due to the lack of new breakthroughs in passive safety technology for zero-gravity seats, the passive restraint system provides significantly less protection for the user in a zero-gravity seat than in a standard seating position in the event of an accident. This can also lead to more serious injuries, such as belt strangulation and lumbar fractures. Consequently, zero-gravity seats are limited to use in parked vehicles and at low speeds in urban areas, resulting in a poor user experience and failing to meet actual user needs. Furthermore, at low speeds, the frequent starting and stopping of vehicles and bumpy roads not only compromise the zero-gravity experience but can also cause motion sickness, anxiety, and other physical discomfort. Therefore, a new system or method is urgently needed to address the limitations of zero-gravity seat usage scenarios, improve the user experience, and enhance the user's sense of security.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0004] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0005] The embodiments of the present disclosure provide a zero-gravity seat system and a control method, a control device, and a vehicle thereof, so as to expand the use scenarios of zero-gravity seats and improve safety and comfort.

[0006] In some embodiments, the zero-gravity seat system includes: a seat bottom frame, including a bottom frame frame and a movable slide rail, the base frame is rotatably set on the movable slide rail, and the movable slide rail is used to slide and connect with the fixed slide rail of the vehicle frame to realize the forward and backward sliding of the seat bottom frame; a magnetorheological hydraulic cylinder, including a cylinder body and a piston rod, and the inner cavity of the cylinder body is filled with magnetorheological fluid; the cylinder body is set on the movable slide rail, and the piston rod is connected to the inclination drive arm of the bottom frame frame; wherein, when the piston rod of the magnetorheological hydraulic cylinder is extended, it drives the front side of the bottom frame frame to lift up so that the seat posture is unfolded, and when the piston rod is retracted, it drives the front side of the bottom frame frame to lower so that the seat posture is retracted.

[0007] In some embodiments, the control method for a zero-gravity seat system, used for the aforementioned zero-gravity seat system, includes: in response to a posture adjustment signal, controlling the piston rod of the magnetorheological hydraulic cylinder of the zero-gravity seat system to extend or retract, so that the seat posture is expanded to increase the seat posture angle or the seat posture is retracted to reduce the seat posture angle.

[0008] In some embodiments, the zero-gravity vehicle seat control system includes the aforementioned zero-gravity seat system and the aforementioned control device for the zero-gravity seat system, which is used to control the zero-gravity seat system to implement the aforementioned control method for the zero-gravity seat system.

[0009] An embodiment of the present disclosure provides a vehicle, comprising the aforementioned zero-gravity vehicle seat system, and / or the aforementioned zero-gravity vehicle seat control system.

[0010] The zero-gravity seat system, control method, control device, and vehicle provided by the embodiments of the present disclosure can achieve the following technical effects:

[0011] The zero-gravity vehicle seat system of the disclosed embodiment utilizes a magnetorheological hydraulic cylinder that replaces conventional hydraulic oil with a variable-damping magnetorheological fluid. This provides the magnetorheological hydraulic cylinder with adjustable damping, vibration isolation, and fast response. Applying this magnetorheological hydraulic cylinder to a zero-gravity vehicle seat allows for more flexible and rapid seat adjustments. Furthermore, it achieves a passive restraint protection effect in zero-gravity compared to a normal seating position, expanding the use cases of zero-gravity seats and enhancing the user experience.

[0012] The control method for a zero-gravity seat system of an embodiment of the present disclosure is based on the aforementioned zero-gravity seat system, so that the adjustment of the seat posture is smoother, without impact or pause, and the response is fast, thereby improving the user's riding experience, and improving the protection performance in the zero-gravity posture, and expanding the use scenarios of zero-gravity seats.

[0013] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0015] Figure 1 is a structural schematic diagram of a zero-gravity seat system provided by an embodiment of the present disclosure;

[0016] Figure 2is a structural schematic diagram of another zero-gravity seat system provided by an embodiment of the present disclosure;

[0017] Figure 3 Schematic diagram of the structure of a magnetorheological hydraulic cylinder provided by an embodiment of the present disclosure;

[0018] Figure 4 is a schematic cross-sectional view of a magnetorheological hydraulic cylinder provided in an embodiment of the present disclosure;

[0019] Figure 5 is a schematic diagram of a zero-gravity seat system provided by an embodiment of the present disclosure in a retracted posture;

[0020] Figure 6 is a schematic diagram of a zero-gravity seat system provided by an embodiment of the present disclosure in an expanded posture;

[0021] Figure 7 is a flow chart of a control method for a zero-gravity seat system provided by an embodiment of the present disclosure;

[0022] Figure 8 is a flow chart of another control method for a zero-gravity seat system provided by an embodiment of the present disclosure;

[0023] Figure 9 is a flow chart of another control method for a zero-gravity seat system provided by an embodiment of the present disclosure;

[0024] Figure 10 is a flow chart of another control method for a zero-gravity seat system provided by an embodiment of the present disclosure;

[0025] Figure 11 is a flow chart of another control method for a zero-gravity seat system provided by an embodiment of the present disclosure;

[0026] Figure 12 is a schematic diagram of a cradle mode provided by an embodiment of the present disclosure;

[0027] Figure 13 A schematic diagram of a control device for a zero-gravity seat system provided in an embodiment of the present disclosure.

[0028] Reference numerals:

[0029] 11. Bottom frame; 12. Moving slide rail; 13. Tilt drive arm; 20. Magnetorheological hydraulic cylinder; 21. Inner cylinder; 210. First end sealing seat; 211. Second end sealing seat; 213. First chamber; 214. Second chamber; 215. First connecting port; 216. Second connecting port; 22. Piston; 221. Flow channel; 222. Wiring harness; 23. Piston rod; 231. Hollow channel; 232. Perforation; 24. Bypass line; 25. Control valve; 26. Hydraulic pump; 27. Outer cylinder; 271. First end cover; 272. C-shaped clamping ring; 28. Buffer structure; 281. Mounting base. DETAILED DESCRIPTION

[0030] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0031] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to facilitate understanding of the embodiments of the present disclosure described herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0032] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0033] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0034] Unless otherwise stated, the term "plurality" means two or more.

[0035] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0036] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0038] Combine Figure 1-6 As shown, the embodiment of the present disclosure provides a zero-gravity seat system, including a seat bottom frame 10 and a magnetorheological hydraulic cylinder 20. The seat bottom frame includes a bottom frame skeleton 11 and a movable slide rail 12. The base skeleton is rotatably arranged on the movable slide rail 12. The movable slide rail 12 is used to slide in connection with the fixed slide rail of the vehicle frame to realize the forward and backward sliding of the seat bottom frame. The magnetorheological hydraulic cylinder 20 includes a cylinder body and a piston rod 23. The inner cavity of the cylinder body is filled with magnetorheological fluid; the cylinder body is arranged on the movable slide rail 12, and the piston rod 23 is connected to the tilt drive arm 13 of the bottom frame skeleton 11. Among them, when the piston rod 23 of the magnetorheological hydraulic cylinder 20 is extended, it drives the front side of the bottom frame skeleton 11 to lift up so that the seat posture is unfolded. When the piston rod 23 is retracted, it drives the front side of the bottom frame skeleton 11 to lower so that the seat posture is retracted.

[0039] The magnetorheological hydraulic cylinder 20 employed in the zero-gravity seat system of the disclosed embodiment replaces conventional hydraulic oil with a variable-damping magnetorheological fluid. This provides the magnetorheological hydraulic cylinder 20 with adjustable damping, vibration isolation, and rapid response. Applying the magnetorheological hydraulic cylinder 20 to zero-gravity vehicle seats allows for more flexible and rapid seat adjustments. Furthermore, it achieves a passive restraint protection effect in zero-gravity compared to a normal seating position, expanding the use cases of zero-gravity seats and enhancing the user experience.

[0040] It can be understood that the bottom frame skeleton 11 adopts a five-link mechanism to achieve lifting or lowering of its front side. The inner front link in the five-link mechanism is the tilt driving arm 13 of the bottom frame skeleton 11, that is, the piston rod 23 of the magnetorheological hydraulic cylinder 20 is transmission-connected to the inner front link of the five-link mechanism.

[0041] The magnetorheological hydraulic cylinder 20's cylinder body is mounted on the movable rail 12 to ensure synchronous sliding movement with the seat base. The cylinder body can be mounted on the movable rail 12 in any manner. Optionally, a second end seal seat 211 of the inner cylinder 21, distal from the extended end of the piston rod 23, is mounted on the movable rail 12.

[0042] The zero-gravity chair system of the disclosed embodiment also includes a seat cushion and a backrest. The seat cushion is mounted on a base frame 11, and the backrest is mounted behind the base frame 11, forming the seat body. Raising or lowering the base frame 11 raises or lowers the seat cushion, thereby changing the seat cushion angle.

[0043] Optionally, the seat posture deployment includes increasing the seat posture angle, for example, increasing the seat cushion angle. The seat posture retraction includes decreasing the seat posture angle, for example, decreasing the seat cushion angle.

[0044] In the embodiment of the present disclosure, the seat posture includes an unfolded posture (i.e., a zero-gravity posture, such as Figure 2 and Figure 6 ) and recovery posture (i.e., non-zero gravity posture, such as Figure 1 and Figure 5 As shown). The retracted posture of the seat is the posture when the seat frame is not lifted, that is, the piston rod 23 of the magnetorheological hydraulic cylinder 20 is in a fully retracted position. In this retracted posture, the inclination angle of the bottom frame frame 11 can be defined as zero, that is, the seat cushion angle can be defined as zero. The retracted posture corresponds to the seat posture with the seat cushion angle at zero. The deployed posture of the seat is the posture when the seat frame is lifted, that is, the piston rod 23 of the magnetorheological hydraulic cylinder 20 is in a non-fully retracted position. In this deployed posture, the inclination angle of the bottom frame frame 11 is non-zero. Different lifting heights correspond to different inclination angles of the bottom frame frame 11, that is, the seat cushion angle is non-zero. The deployed posture corresponds to a variety of seat postures with a variety of different non-zero seat cushion angles. That is, the extended length of the piston rod 23 (or the position of the piston 22 in the inner cylinder 21 described below) corresponds to the seat cushion angle, and the longer the piston rod 23 is extended, the larger the seat cushion angle.

[0045] In some embodiments, combined Figures 3 and 4As shown, the magnetorheological hydraulic cylinder 20 comprises a cylinder body, a piston 22, a piston rod 23, a bypass line 24, a control valve 25, and a hydraulic pump 26. The cylinder body includes an inner cylinder 21, which is equipped with a first electromagnetic element (not shown). When energized, the first electromagnetic element generates a magnetic field to adjust the damping of the magnetorheological fluid filled in the inner cylinder. The piston 22 is disposed within the inner cylinder 21, dividing the inner cylinder 21 into a first chamber 213 and a second chamber 214. The piston 22 is provided with a flow channel 221 that connects the first and second chambers 213 and 214. The piston 22 is also equipped with a second electromagnetic element (not shown) (forming an electromagnetic piston). When energized, the second electromagnetic element generates a magnetic field to adjust the damping of the magnetorheological fluid in the flow channel 221. One end of the piston rod 23 is connected to the electromagnetic piston 22, and the other end is extended to the outside through the first end sealing seat 210 of the inner cylinder 21. A first opening and a second opening are formed on the wall of the inner cylinder 21, corresponding to the first chamber 213 and the second chamber 214, respectively. The ends of the bypass line 24 are connected to the first and second openings, respectively. A control valve 25 is connected to the bypass line 24 to control its flow. A hydraulic pump 26 is connected to the bypass line 24 to control the direction of flow in either the first or second direction. The first direction of flow is the flow of magnetorheological fluid from the first chamber 213 to the second chamber 214, while the second direction of flow is the flow of magnetorheological fluid from the second chamber 214 to the first chamber 213.

[0046] The magnetorheological hydraulic cylinder 20 of this embodiment uses magnetorheological fluid as the hydraulic fluid. The magnetorheological fluid can rapidly change its rheological properties, i.e., damping state, under the action of an external magnetic field, and its rheological properties are continuously adjustable. That is, the rheological properties of the magnetorheological fluid can be continuously and adjustable gradually increased from the optimal flow state with minimum damping to the solid-like state with maximum damping. By continuously increasing the applied magnetic field, the rheological properties of the magnetorheological fluid continuously deteriorate until it exhibits a solid-like state. After the magnetic field is removed, the magnetorheological fluid can quickly return to its optimal flow state. By regulating the intensity of the magnetic field applied to the magnetorheological fluid, the damping state of the magnetorheological fluid can be adjusted, and the damping state of the magnetorheological fluid can be switched between damping states such as the holding state, the head-on collision state, the adjustment state, the head-on collision energy absorption state, and the rear collision energy absorption state to achieve multifunctional adjustment.

[0047] The holding state is a solid-like state in which the magnetorheological fluid exhibits maximum damping under the action of a magnetic field. When the magnetorheological fluid is in the holding state, the magnetorheological hydraulic cylinder 20 can be regarded as a fixed part.

[0048] The head-on collision state is an optimal fluid state with minimum damping when the magnetorheological fluid is not subjected to an applied magnetic field. In this head-on collision state, the magnetorheological fluid can flow freely with minimum damping.

[0049] The adjustment state is a fluid state in which the damping of the magnetorheological fluid under the action of the magnetic field is between the maximum damping and the minimum damping. In this adjustment state, the magnetorheological fluid can flow.

[0050] The head-on energy absorption state is a state in which the damping of the magnetorheological fluid is in a certain damping adjustment state, for example, the first damping.

[0051] The post-impact energy absorption state is a state where the damping of the magnetorheological fluid is adjusted to a certain damping value. For example, the second damping value. The first damping value and the second damping value may be the same or different. Optionally, the first damping value and the second damping value may be different.

[0052] The damping state of the magnetorheological fluid is adjusted by the strength of the magnetic field applied to it. The magnetorheological fluid in the magnetorheological hydraulic cylinder 20 of this embodiment is divided into three sections based on their location: the first chamber 213, the second chamber 214, and the flow channel 221 of the piston 22. The magnetic field generated by the first electromagnetic element, located on the wall of the inner cylinder 21, can adjust the damping state of the magnetorheological fluid in the first chamber 213 and the second chamber 214, respectively. The magnetic field generated by the second electromagnetic element, located on the piston 22, can also adjust the damping state of the magnetorheological fluid in the flow channel 221 of the piston 22.

[0053] Optionally, a first magnetic field B is applied to the magnetorheological fluid at the target position. max , so that the magnetorheological fluid at the target position is in a maintained state; the first magnetic field B max is the maximum value within the adjustable magnetic field strength range. The first magnetic field B max The specific value of can be determined according to the magnetorheological fluid.

[0054] Optionally, a second magnetic field B is applied to the magnetorheological fluid at the target position, so that the magnetorheological fluid at the target position is in a regulated state; the second magnetic field B is smaller than the first magnetic field B. max of any magnetic field.

[0055] Optionally, the magnetic field applied by the magnetorheological fluid at the target position is canceled, so that the magnetorheological fluid at the target position is in a head-on collision state, at which point the magnetorheological fluid has a minimum damping and is in an optimal fluid state.

[0056] Optionally, a third magnetic field B is applied to the magnetorheological fluid at the target position. 吸能 , so that the magnetorheological fluid at the target position is in a positive collision energy absorption state; the third magnetic field B 吸能 is smaller than the first magnetic field B max A determines the magnetic field strength.

[0057] Optionally, a fourth magnetic field B is applied to the magnetorheological fluid at the target position. 吸能 , so that the magnetorheological fluid at the target position is in a post-collision energy absorption state; the fourth magnetic field B 吸能is smaller than the first magnetic field B max A determines the magnetic field strength. The fourth magnetic field B 吸能 Different from the third magnetic field B 吸能 .

[0058] In some embodiments, the first electromagnetic element and / or the second electromagnetic element includes a magnetic generator, such as an excitation coil. By supplying power to the magnetic generator and controlling the current, the magnetic field strength generated by the magnetic generator is adjusted, thereby adjusting the damping state of the magnetorheological fluid. Adjustment of the damping state of the magnetorheological fluid is achieved in conjunction with the aforementioned related information.

[0059] Optionally, the magnetic generator corresponding to the target position is powered on and the current value is a first current value I max , thereby applying a first magnetic field B to the magnetorheological fluid at the target position max That is, the first current value I max Corresponding to the first magnetic field B max , which corresponds to the maintenance state of the magnetorheological fluid. The first current value I max According to the magnetic generator and the required first magnetic field B max For example, the first current value I max is 2A.

[0060] Optionally, the magnetic generator corresponding to the target position is energized with a second current value I, thereby applying a second magnetic field B to the magnetorheological fluid at the target position. That is, the second current value I corresponds to the second magnetic field B, and thus to the regulated state of the magnetorheological fluid. For example, the second current value I is any current value less than 2A.

[0061] Optionally, the magnetic generator corresponding to the target position is powered on and the current value is a third current value I 吸能 , thereby applying a third magnetic field B to the magnetorheological fluid at the target position 吸能 That is, the third current value I 吸能 Corresponding to the third magnetic field B 吸能 , is less than the first current value I max A certain current value corresponds to the positive collision energy absorption state of the magnetorheological fluid.

[0062] Optionally, the magnetic generator corresponding to the target position is powered on and the current value is a fourth current value I 吸能 , thereby applying a fourth magnetic field B to the magnetorheological fluid at the target position 吸能 That is, the fourth current value I 吸能 Corresponding to the fourth magnetic field B 吸能 , is less than the first current value I max Another determined current value which is different from the third current value I 吸能 , which corresponds to the post-collision energy absorption state of the magnetorheological fluid.

[0063] Alternatively, the magnetic generator corresponding to the target location is de-energized, i.e., its current is set to zero, thereby canceling the magnetic field applied by the magnetorheological fluid at the target location, causing the magnetorheological fluid at the target location to enter a positive collision state. At this point, the magnetorheological fluid has minimal damping and is in an optimal fluid state.

[0064] Optionally, the first communication port 215 is opened on the first end sealing seat 210 of the inner cylinder 21 , presenting a through hole penetrating the thickness direction of the first end sealing seat 210 , so as to provide a larger stroke for the piston 22 .

[0065] Optionally, the second communication port 216 is opened on the inner cavity wall of the inner cylinder 21 near the second end to provide a larger stroke for the piston 22 .

[0066] Optionally, along the axial direction of the piston rod 23, the piston rod 23 is provided with a hollow channel 231 and a through hole 232 communicating with the hollow channel 231, and the hollow channel 231 allows the wiring harness 222 to pass through. The wiring harness 222 can be a power supply line for the first electromagnetic component provided on the piston 22.

[0067] In some embodiments, as Figure 3 and Figure 4 As shown, the cylinder body also includes an outer cylinder 27 and a buffer structure 28. The first end of the inner cylinder 21 is passed through the second end of the outer cylinder 27 so that part of the inner cylinder 21 is sleeved in the outer cylinder 27; wherein, the other end of the piston rod 23 is passed through the first end sealing seat 210 of the inner cylinder 21 and extends to the outside by the first end cover 271 of the outer cylinder 27. One end of the buffer structure 28 is arranged at the first end sealing seat 210 of the inner cylinder 21, and the other end is arranged at the second end of the outer cylinder 27. In this embodiment, the addition of the outer cylinder 27 provides better support and guide limit for the piston rod 23, while the buffer structure 28 further provides buffering.

[0068] Optionally, the buffer structure 28 includes a coil spring. The coil spring is sleeved on the outer wall of the first end side of the inner cylinder 21.

[0069] Optionally, the buffer structure 28 is disposed on the first end sealing seat 210 of the inner cylinder 21 through a mounting base 281 .

[0070] Optionally, a through hole is provided on the first end cover 271 of the outer cylinder 27 , and the other end of the piston rod 23 extends to the outside through the through hole; and a C-shaped clamping ring 272 is provided on the inner wall of the through hole.

[0071] The extension control method of the piston rod 23 of the magnetorheological hydraulic cylinder 20 of the embodiment of the present disclosure includes:

[0072] The magnetorheological fluid in the flow channel 221 of the control piston 22 is adjusted to a holding state, and the magnetorheological fluid in the first chamber 213 and the second chamber 214 are adjusted to a regulating state; the control valve 25 is controlled to open and the hydraulic pump 26 is started (for example, forward rotation) so that the magnetorheological fluid flows in the first direction along the bypass line 24; or,

[0073] The magnetorheological fluid in the flow channel 221 of the control piston 22 and in the first chamber 213 and the second chamber 214 is adjusted to a regulating state, the control valve 25 is opened, and the hydraulic pump 26 is started (for example, forward rotation), so that the magnetorheological fluid flows in the first direction along the bypass line 24; or,

[0074] The magnetorheological fluid in the flow channel 221 of the control piston 22 and in the first chamber 213 and the second chamber 214 is adjusted to a regulating state; the control valve 25 is controlled to remain closed and the hydraulic pump 26 is controlled to remain stopped; so that the piston rod 23 is in a state where it can extend and absorb energy.

[0075] According to actual conditions, the desired extension control method of the piston rod 23 can be selected.

[0076] The control method for retracting the piston rod 23 of the magnetorheological hydraulic cylinder 20 of the embodiment of the present disclosure includes:

[0077] The magnetorheological fluid in the flow channel 221 of the control piston 22 is adjusted to a holding state, and the magnetorheological fluid in the first chamber 213 and the second chamber 214 are adjusted to a regulating state; the control valve 25 is controlled to open and the hydraulic pump 26 is started (for example, reversed) so that the magnetorheological fluid flows in the second direction along the bypass line 24; or,

[0078] The magnetorheological fluid in the flow channel 221 of the control piston 22 and in the first chamber 213 and the second chamber 214 is adjusted to a regulating state / positive collision state; the control valve 25 is opened and the hydraulic pump 26 is started (for example, reversed) so that the magnetorheological fluid flows in the second direction along the bypass line 24; or,

[0079] The magnetorheological fluid in the flow channel 221 of the control piston 22 and in the first chamber 213 and the second chamber 214 is adjusted to a regulating state; the control valve 25 is controlled to remain closed and the hydraulic pump 26 is controlled to remain stopped; so that the piston rod 23 is in a state where it can retract and absorb energy.

[0080] Furthermore, in the disclosed embodiment, it is understood that once the seat posture adjustment is complete and the current posture is maintained, the magneto-rheological fluid in the flow channel 221 of the piston 22 and in the first chamber 213 and second chamber 214 are all adjusted to a holding state to maintain the seat posture. In this case, the magneto-rheological hydraulic cylinder 20 acts as a solid object.

[0081] The present disclosure provides a control method for a zero-gravity seat system, which is used for the aforementioned zero-gravity seat system (such as Figures 1 to 6 As shown), the control method includes:

[0082] In response to the posture adjustment signal, the piston rod 23 of the magnetorheological hydraulic cylinder 20 of the zero-gravity seat system is controlled to extend or retract, so that the seat posture is deployed to increase the seat posture angle or retracted to reduce the seat posture angle.

[0083] The control method for a zero-gravity seat system of an embodiment of the present disclosure is based on the aforementioned zero-gravity seat system, which makes the adjustment of the seat posture smoother, without impact or pause, and with a fast response, thereby improving the user's riding experience, and improving the protection performance in the zero-gravity posture, thereby expanding the use scenarios of zero-gravity seats.

[0084] In the embodiment of the present disclosure, the triggering of the posture adjustment signal can be the normal posture adjustment of the seat posture by the passenger, for example, the passenger triggers the adjustment button; the triggering of the posture adjustment signal can also be automatically triggered when the preset trigger conditions are met; there is no limit, it can be set according to actual needs.

[0085] In some embodiments, the attitude adjustment signal includes an attitude deployment signal and an attitude retraction signal.

[0086] Optionally, the attitude adjustment signal includes an attitude expansion signal; in response to the attitude adjustment signal, the piston rod 23 of the magnetorheological hydraulic cylinder 20 of the zero-gravity seat system is controlled to extend so that the seat attitude is expanded to increase the seat attitude angle, including: in response to the attitude expansion signal, the magnetorheological fluid in the flow channel 221 of the control piston 22 is adjusted to a holding state, and the magnetorheological fluid in the first chamber 213 and the second chamber 214 is adjusted to an adjustment state; the control valve 25 is controlled to open, and the hydraulic pump 26 rotates forward, so that the magnetorheological fluid flows from the first chamber 213 to the second chamber 214 (first-direction flow), and the piston rod 23 is extended. In this embodiment, the flow channel 221 of the piston 22 is filled with a solid-state magnetorheological fluid, and the magnetorheological fluid in the first chamber 213 and the second chamber 214 in a fluid state flows from the first chamber 213 to the second chamber 214 through the bypass line 24 under the action of the hydraulic pump 26, and pushes the electromagnetic piston 22 and the piston rod 23 to extend outward from the inner cylinder 21, thereby realizing the zero-gravity seat posture deployment.

[0087] The seat posture deployment can be from the seat's retracted posture to the deployed posture, or from the first deployed posture to the second deployed posture, either of which is determined based on the control scenario. The end point of the posture deployment can be determined based on the actual control scenario.

[0088] Optionally, the posture adjustment signal includes a posture recovery signal; in response to the posture recovery signal, the piston rod 23 of the magnetorheological hydraulic cylinder 20 of the zero-gravity seat system is controlled to retract, causing the seat posture to retract and reduce the seat posture angle. This includes: controlling the magnetorheological fluid in the flow channel 221 of the piston 22 to a holding state, and the magnetorheological fluid in the first chamber 213 and the second chamber 214 to a regulating state; and controlling the control valve 25 to open and the hydraulic pump 26 to reverse, causing the magnetorheological fluid to flow from the second chamber 214 to the first chamber 213, thereby retracting the piston rod 23. In this embodiment, the flow channel 221 of the piston 22 is filled with a quasi-solid magnetorheological fluid, while the magnetorheological fluid in the first chamber 213 and the second chamber 214, in a fluid state, flows from the second chamber 214 to the first chamber 213 under the action of the hydraulic pump 26 through the bypass line 24, pushing the electromagnetic piston 22 and piston rod 23 to retract into the inner cylinder 21, thereby achieving zero-gravity seat posture recovery.

[0089] The seat posture retraction can be from the deployed posture to the retracted posture, or from the second deployed posture to the first deployed posture, either of which is determined based on the control scenario. The posture retraction cutoff can be determined based on the actual control scenario.

[0090] like Figure 7 As shown, a control method for a zero-gravity seat system, involving posture adjustment control logic, includes the following steps:

[0091] Step S101, start;

[0092] Step S102, posture adjustment signal determination: determine whether the posture adjustment signal is a recovery adjustment signal or an expansion adjustment signal. If it is an expansion adjustment signal, execute S103; if it is a recovery adjustment signal, execute S104;

[0093] In step S103, a combined action is performed: control valve 25 opens, hydraulic pump 26 rotates forward, the damping of the magnetorheological fluid in second chamber 214 and first chamber 213 is adjusted from a hold state to an adjusted state, and the magnetorheological fluid in flow channel 221 of piston 22 remains in a hold state at maximum damping. Driven by hydraulic pump 26, the magnetorheological fluid flows from first chamber 213 to second chamber 214 through bypass line 24, pushing piston 22 and piston rod 23 outward from inner cylinder 21, achieving zero-gravity seat deployment.

[0094] In step S104, a combined action is performed: control valve 25 opens, hydraulic pump 26 rotates in reverse, the damping of the magnetorheological fluid in second chamber 214 and first chamber 213 is adjusted from a holding state to an adjustment state, and the magnetorheological fluid in flow channel 221 of piston 22 remains in a holding state at maximum damping. Driven by hydraulic pump 26, the magnetorheological fluid flows from second chamber 214 to first chamber 213 through bypass line 24, pushing piston 22 and piston rod 23 back into inner cylinder 21, achieving zero-gravity seat posture recovery.

[0095] Step S105: After receiving the adjustment end signal, execute S106.

[0096] Step S106, perform the following actions: the control valve 25 is closed, the hydraulic pump 26 is stopped; the magnetorheological fluid in the flow channel 221 of the piston 22 maintains a holding state of maximum damping, and the magnetorheological fluid in the second chamber 214 and the first chamber 213 is adjusted to a holding state.

[0097] Step S107, end.

[0098] Combine Figure 8 As shown, in some embodiments, a control method for a zero-gravity seat system further includes:

[0099] S21. Obtain the current vehicle status. The vehicle status includes the driving state and the parking state. The vehicle status can be obtained in any manner.

[0100] Optionally, the vehicle state is determined by the vehicle gear position. When the gear position is D gear, the vehicle state is determined to be the driving state; when the gear position is P gear, the vehicle state is determined to be the parking state.

[0101] Optionally, the vehicle state is determined by a vehicle speed sensor. When the speed signal of the speed sensor is non-zero, the vehicle state is determined to be a driving state; when the speed signal of the speed sensor is zero, the vehicle state is determined to be a parking state.

[0102] S22: When the vehicle is in a driving state and the seat is in an unfolded state, obtain a current posture angle of the seat. The current posture angle of the seat can be determined by the current position of the piston 22 of the magnetorheological hydraulic cylinder 20 in the seat system.

[0103] S23: If the current posture angle is greater than the safe posture angle, triggering a posture correction adjustment signal. The safe posture angle is a safe posture angle that matches the body characteristics of the current occupant. That is, there is a corresponding relationship between the safe posture angle and the body characteristics.

[0104] Optionally, the correspondence between the safe posture angle and human body characteristics can be obtained by analyzing the optimal experience and safe posture of different human bodies and using different dummies to verify the physical trolley. For example, human body characteristics include the height, chest width and weight of men and women, and the human body characteristics are divided into multiple body feature intervals, and a safe posture angle is corresponding to each body feature interval, and a safe posture angle correspondence matrix of men and women with different body features is obtained, as shown in Table 1. For example, when a man's body characteristics are a height of 1.65m, a chest width of 270mm, and a weight of 55kg, the corresponding safe posture angle is a seat cushion angle of 25°. When the height, chest width and weight do not meet a body feature interval at the same time, the safe posture angle can be determined by weight as a reference.

[0105] Table 1

[0106]

[0107] Table 1 shows the backrest angle. In the embodiment of the present disclosure, the seat posture angle adjustment is mainly the seat cushion angle adjustment. When the angle between the backrest and the seat cushion remains unchanged, the backrest angle is adjusted in accordance with the seat cushion angle adjustment. When the backrest angle does not meet the backrest angle value shown in Table 1, a backrest angle adjustment signal can be synchronously given to the backrest adjustment mechanism to synchronously control the backrest adjustment mechanism to drive the backrest to rotate so that the backrest angle meets the backrest angle requirement. Figure 6 As shown by "α", the backrest angle is Figure 6 Of course, Table 1 does not list all the corresponding relationships, that is, the corresponding relationships between the safety posture angles and human body features are not limited to the corresponding relationships shown in Table 1.

[0108] Optionally, the corresponding relationship is pre-stored in the control device, for example, in a database of the control device.

[0109] S24 , in response to the posture correction adjustment signal, controlling the piston rod 23 of the magnetorheological hydraulic cylinder 20 to retract, so that the seat posture is recovered to reduce the seat posture angle to a safe posture angle.

[0110] In this embodiment, the posture adjustment signal includes a posture correction adjustment signal. A preset trigger condition, "the current posture angle is greater than the safe posture angle," is set. When this preset trigger condition is met, posture correction is actively performed. The control method of this embodiment includes safe posture control, ensuring that the posture angle of the seat in the deployed position is within the safe posture angle range for the occupant, ensuring comfort and matching the occupant's anatomy to minimize potential harm.

[0111] In step S24, in response to the posture correction adjustment signal, the piston rod 23 of the magnetorheological hydraulic cylinder 20 is controlled to retract, so that the seat posture is recovered to reduce the posture angle of the seat to a safe posture angle, including: in response to the posture correction adjustment signal, the magnetorheological fluid in the flow channel 221 of the control piston 22 is kept in a maintained state, and the magnetorheological fluid in the first chamber 213 and the second chamber 214 is adjusted to a regulation state; the control valve 25 is controlled to open, and the hydraulic pump 26 is reversed, so that the magnetorheological fluid flows from the second chamber 214 to the first chamber 213, and the piston rod 23 retracts, so that the seat posture is recovered to reduce the posture angle of the seat to a safe posture angle.

[0112] like Figure 9 As shown, a control method for a zero-gravity seat system, involving a safety posture control logic, comprises the following steps:

[0113] Step S201, start;

[0114] Step S202, human body feature determination: the control device receives the camera signal and determines the human body feature of the current passenger;

[0115] Step S203, obtaining a safety posture angle (optimal safety posture): The control device obtains a safety posture angle (optimal safety posture angle) for optimal protection based on the current occupant's body characteristics. For example, the corresponding data is read from Table 1.

[0116] Step S204, gear position determination: if it is not in the D gear, no posture correction adjustment is performed and the process proceeds to S207; if it is in the D gear, the process proceeds to S205 to compare and determine the current posture angle;

[0117] Step S205, current attitude angle comparison: if the current attitude angle is less than or equal to the safe attitude angle (optimal safe attitude angle) obtained in S203, proceed to S207; if the current attitude angle is greater than the safe attitude angle (optimal safe attitude angle) obtained in S203, proceed to S206;

[0118] Step S206: Perform posture correction and adjustment to ensure the seat meets the optimal safe posture angle obtained in S203. Specifically, the magnetorheological fluid in the flow channel 221 of the control piston 22 is maintained, and the magnetorheological fluid in the first chamber 213 and the second chamber 214 are adjusted to a regulated state. The control valve 25 is opened, and the hydraulic pump 26 is reversed, causing the magnetorheological fluid to flow from the second chamber 214 to the first chamber 213. The piston rod 23 retracts, causing the seat to retract and reduce its posture angle to the safe posture angle.

[0119] Step S207, end.

[0120] Combine Figure 10As shown, in some embodiments, a control method for a zero-gravity seat system involves collision control logic when a collision occurs, and further includes:

[0121] S31, obtaining the current vehicle status. This step is the same as the above-mentioned step S21 and will not be repeated here.

[0122] S32: When the current vehicle state is the driving state, a collision signal is obtained, wherein the collision signal includes a frontal collision signal and a rear collision signal.

[0123] S33: If the collision signal is a head-on collision and the seat is in the deployed position, a head-on collision recovery signal is triggered. In response to the head-on collision recovery signal, the magnetorheological fluid in the magnetorheological hydraulic cylinder 20 is adjusted to a head-on collision state and the piston rod 23 is retracted, causing the seat to recover and reduce its posture angle to a retracted position. In the head-on collision state, the magnetorheological fluid's damping is at its minimum.

[0124] Optionally, in response to a head-on collision recovery signal, the piston rod 23 of the magneto-rheological hydraulic cylinder 20 is controlled to retract, causing the seat to retract and reduce its posture angle to the seat retracted posture. This includes controlling the magneto-rheological fluid in the magneto-rheological hydraulic cylinder 20 (including all magneto-rheological fluid in the first chamber 213, the second chamber 214, and the flow channel 221) to adjust to a head-on collision state, and controlling the control valve 25 to open and the hydraulic pump 26 to reverse. This allows the magneto-rheological fluid to flow from the second chamber 214 to the first chamber 213. Simultaneously, the magneto-rheological fluid also flows from the second chamber 214 to the first chamber 213 through the flow channel 221, pushing the piston 22 and piston rod 23 to retract, enabling the user to quickly adjust from a zero-gravity posture to an optimal protective posture, thereby improving the protective effect of the passive restraint system.

[0125] The posture adjustment signal includes a posture head-on collision recovery signal, and "the collision signal is a head-on collision signal and the seat is in the unfolded posture" is a preset trigger condition. When the preset trigger condition is met, the posture head-on collision recovery adjustment is performed.

[0126] S34. If the collision signal is a head-on collision and the seat is in the retracted position, trigger a head-on collision energy absorption signal. In response to the head-on collision energy absorption signal, during the collision rebound phase, the magnetorheological fluid in the magnetorheological hydraulic cylinder 20 is controlled to a head-on collision energy absorption state, allowing the piston rod 23 to autonomously extend to absorb energy or autonomously retract to absorb energy. The head-on collision energy absorption state is when the magnetorheological fluid's damping is at a first damping level between maximum and minimum damping.

[0127] Optionally, in response to a head-on collision energy absorption signal, during the collision rebound phase, the magnetorheological fluid in the magnetorheological hydraulic cylinder 20 is controlled to a head-on collision energy absorption state, allowing the piston rod 23 to autonomously extend to absorb energy or autonomously recover energy absorption; including: during the head-on collision rebound phase, the magnetorheological fluid in the magnetorheological hydraulic cylinder 20 (including all magnetorheological fluid in the first chamber 213, the second chamber 214, and the flow channel 221) is controlled to adjust to the head-on collision energy absorption state, and the control valve 25 and the hydraulic pump 26 are controlled to remain closed. That is, during the head-on collision rebound phase, the magnetorheological fluid flows from the first chamber 213 to the second chamber 214 through the flow channel 221 on the piston 22, and the piston rod 23 extends, achieving rebound energy absorption and reducing secondary collision damage.

[0128] It will be appreciated that in step S34, during the forward impact phase of a head-on collision, the control valve 25 remains closed, the hydraulic pump 26 remains stopped, and the magnetorheological fluid within the inner cylinder 21 remains in a maintained state. Specifically, during the forward impact phase and with the seat in the retracted position, the magnetorheological fluid remains stationary.

[0129] The posture adjustment signal includes a posture head-on collision energy absorption signal, and "the collision signal is a head-on collision signal and the seat is in a retracted posture" is a preset trigger condition. When the preset trigger condition is met, the posture head-on collision energy absorption adjustment is performed.

[0130] S35. If the collision signal is a rear-end collision signal, a posture rear-end collision energy absorption signal is triggered. In response to the posture rear-end collision energy absorption signal, the magnetorheological fluid in the magnetorheological hydraulic cylinder 20 is controlled to be in a rear-end collision energy absorption state, so that the piston rod 23 can autonomously extend or retract to absorb energy. The rear-end collision energy absorption state is a second damping state in which the magnetorheological fluid has a damping value between maximum damping and minimum damping.

[0131] Optionally, the magnetorheological fluid within the magnetorheological hydraulic cylinder 20 is controlled to a rear-impact energy-absorbing state, enabling the piston rod 23 to autonomously extend or retract to absorb energy. This includes controlling the magnetorheological fluid within the magnetorheological hydraulic cylinder 20 to a rear-impact energy-absorbing state, maintaining the control valve 25 closed, and the hydraulic pump 26 closed. During a rear-impact collision, the magnetorheological fluid flows from the first chamber 213 to the second chamber 214 through the flow channel 221, absorbing rear-impact energy and improving head and neck protection. Seat posture is not considered in this step S35.

[0132] The posture adjustment signal includes a posture rear-collision energy absorption signal, and "the collision signal is a rear-collision signal" is a preset trigger condition. When the preset trigger condition is met, the posture rear-collision energy absorption adjustment is performed.

[0133] In the control method of this embodiment, the adjustment of the seat posture in two collision scenarios, namely head-on collision and rear-end collision, is distinguished, which reduces the damage caused to the passengers by the collision and improves the protection effect of head-on collision and rear-end collision.

[0134] In the control method of this embodiment, the first damping corresponding to the head-on energy absorption state of the magnetorheological fluid and the second damping corresponding to the rearward energy absorption state may be consistent or inconsistent, depending on actual conditions.

[0135] Optionally, the first damping and the second damping are different.

[0136] Optionally, the electromagnetic component's current value required for the magnetorheological fluid's head-on energy absorption state is a head-on current value that matches the occupant's anatomy. That is, there exists a corresponding relationship between the head-on current value and anatomy. This relationship is not limited and can be determined based on actual analysis.

[0137] Optionally, the correspondence between the positive impact current value and the human body characteristics can be obtained by analyzing different human body characteristics, combining CAE (computer-aided engineering) analysis, and using different dummies for physical trolley verification, thereby obtaining the correspondence between the positive impact current value and the human body characteristics. Exemplarily, the human body characteristics include the height, chest width and weight of men and women, and the human body characteristics are divided into multiple body feature intervals, and a positive impact current value is corresponding to each body feature interval, and the correspondence matrix of the positive impact current values ​​of men and women with different body features is obtained, as shown in Table 2. For example, when the human body characteristics of a woman are a height of 1.60m, a chest width of 265mm, and a weight of 55kg, the corresponding positive impact current value is 1.5A. Among them, when the current value is 2A, the magnetorheological fluid is in a holding state under maximum damping. Among them, when the height, chest width and weight do not meet a body feature interval at the same time, the weight can be used as a reference to determine the positive impact current value. Table 2 does not list all the corresponding relationships. That is, the corresponding relationships between the positive impact current value and the human body characteristics are not limited to the corresponding relationships shown in Table 2 and can be determined according to actual conditions.

[0138] Table 2

[0139]

[0140] Of course, Table 2 does not list all the corresponding relationships. That is, the corresponding relationships between the positive impact current values ​​and the human body characteristics are not limited to the corresponding relationships shown in Table 2.

[0141] Optionally, the current value of the electromagnetic component required for the magnetorheological fluid's rear-impact energy absorption state is a rear-impact current value that matches the anatomy of the current occupant. That is, a corresponding relationship exists between the rear-impact current value and the anatomy. This corresponding relationship is not limited and can be determined based on actual analysis. Specifically, the corresponding relationship between the rear-impact current value and the anatomy can be derived by referring to the aforementioned method for obtaining the corresponding relationship between the head-on impact current value and the anatomy, and will not be further elaborated here.

[0142] Optionally, before obtaining the vehicle status, the control method further includes: determining, based on the body characteristics of the occupants, a frontal collision current and a rear collision current that match the body characteristics of the current occupants.

[0143] Combine Figure 11 As shown, a control method for a zero-gravity seat system involves collision control logic when a collision occurs, comprising the following steps:

[0144] Step S301, start;

[0145] In step S302, the control device receives the camera signal and determines the anatomy of the current occupant. Based on the anatomy of the current occupant, the control device determines the optimal frontal and rear impact current values ​​for protection. This step can be integrated into steps S202 and S203 of the aforementioned safety posture control logic control method. That is, when executing the collision control logic of this embodiment, the frontal and rear impact current values ​​matched to the occupant can be directly used.

[0146] Step S303, judge the received collision signal: if it is a head-on collision signal and the seat is in an extended posture (i.e., a zero-gravity posture), execute S304; if it is a head-on collision signal and the seat is in a retracted posture (i.e., a non-zero-gravity posture), execute S305; if it is a rear-end collision signal and the seat is in any posture, execute S306.

[0147] In step S304, the following actions are performed: the control valve 25 is opened, the hydraulic pump 26 rotates in reverse, the damping of the magnetorheological fluid in the second chamber 214 and the first chamber 213 is adjusted from a holding state to a positive impact state, and the magnetorheological fluid in the magnetorheological flow channel 22113 is adjusted to a positive impact state. Specifically, the damping of all the magnetorheological fluid in the inner cylinder 21 is adjusted to minimum damping. For example, the application of the magnetic field to the magnetorheological fluid is stopped.

[0148] Step S305, execute the combined action: collision forward stage: the control valve 25 remains closed, and the hydraulic pump 26 remains stopped; the magnetorheological fluid in the second chamber 214, the first chamber 213, and the magnetorheological flow channel 22113 remains in a holding state; collision rebound stage: the control valve 25 remains closed, and the hydraulic pump 26 remains stopped; the magnetorheological fluid in the second chamber 214, the first chamber 213, and the flow channel 221 is adjusted to a positive collision energy absorption state.

[0149] Step S306 , performing a combined action: the control valve 25 remains closed, the hydraulic pump 26 remains stopped; the magnetorheological fluid in the second chamber 214 , the first chamber 213 , and the flow channel 221 is adjusted to a post-impact energy absorption state.

[0150] Step S307, end.

[0151] In some embodiments, a control method for a zero-gravity seat system, involving a shock-absorbing control logic, further includes:

[0152] Obtain the current vehicle status; this step is the same as the aforementioned step S21 and will not be repeated here.

[0153] When the current vehicle state is the driving state and the seat is in the unfolded position, the control starts the shock absorption mode; in this shock absorption mode, the control valve 25 is closed and the hydraulic pump 26 is stopped; the magnetorheological fluid can dynamically flow between the first cavity 213 and the second cavity 214 through the flow channel 221.

[0154] Acquire real-time road condition signals and / or real-time vehicle vibration signals; wherein, the real-time road condition signals include road condition information input by the entire vehicle; the real-time vehicle vibration signals include suspension vibration acceleration signals, seat slide vibration acceleration signals, backrest acceleration signals, etc. input by the entire vehicle.

[0155] The real-time damping of the magnetorheological fluid is determined according to the real-time road condition signal and / or the real-time vehicle vibration signal; and the damping of the magnetorheological fluid in the magnetorheological hydraulic cylinder 20 is dynamically adjusted according to the real-time damping.

[0156] This embodiment is a shock absorption control mode, in which the damping of the magnetorheological fluid in the inner cylinder 21 (including the flow channel 221) in the flow channel 221 of the piston 22 is dynamically adjusted in real time, so that the magnetorheological fluid flows dynamically between the first cavity 213 and the second cavity 214 through the flow channel 221, causing the piston rod 23 to dynamically extend or retract, thereby achieving autonomous shock absorption.

[0157] Optionally, real-time road condition signals and / or real-time vehicle vibration signals are obtained to determine the real-time damping state of the magnetorheological fluid; this includes determining the required shock absorber damping parameters based on any one or more of the road condition signals, suspension vibration acceleration signals, seat rail vibration acceleration signals, and backrest acceleration signals; and determining the real-time damping of the magnetorheological fluid based on the shock absorber damping parameters. In this embodiment, the real-time damping of the magnetorheological fluid is adjusted specifically by adjusting the current values ​​of the first electromagnetic element and the second electromagnetic element. In this embodiment, the corresponding relationship between each signal and the required shock absorber damping and the real-time damping of the magnetorheological fluid can be obtained through analysis and experimental means, thereby enabling the real-time damping of the magnetorheological fluid to be read in real time during the control process. Of course, the real-time damping of the magnetorheological fluid can also be obtained through real-time analysis, which is not limited and can be determined based on actual conditions.

[0158] Optionally, controlling the damping of the magnetorheological fluid in the magnetorheological hydraulic cylinder 20 to be dynamically adjusted according to the real-time damping state includes: controlling the control valve 25 to remain closed, and adjusting the damping of the magnetorheological fluid to the real-time damping state.

[0159] In some embodiments, a control method for a zero-gravity seat system, involving anti-vertigo mode control logic, further includes:

[0160] Obtain the current vehicle status; this step is the same as the aforementioned step S21 and will not be repeated here.

[0161] When the current vehicle state is driving state and the seat is in the unfolded position, the anti-dizziness mode is controlled to start; in this anti-dizziness mode, the control valve 25 is closed and the hydraulic pump 26 is stopped; the magnetorheological fluid can dynamically flow between the first cavity 213 and the second cavity 214 through the flow channel 221.

[0162] Obtain a vehicle braking signal; wherein the vehicle braking signal includes a brake pedal signal and / or an accelerator pedal signal.

[0163] According to the vehicle braking signal, the real-time damping of the magnetorheological fluid is determined, and the damping of the magnetorheological fluid in the magnetorheological hydraulic cylinder is controlled to be dynamically adjusted according to the real-time damping.

[0164] This embodiment is an anti-dizziness control mode, in which the damping of the magnetorheological fluid in the inner cylinder 21 (including the flow channel 221) in the flow channel 221 of the piston 22 is dynamically adjusted in real time, so that the magnetorheological fluid flows dynamically between the first cavity 213 and the second cavity 214 through the flow channel 221, causing the piston rod 23 to dynamically extend or retract, thereby achieving anti-dizziness.

[0165] Optionally, determining the real-time damping of the magnetorheological fluid based on the vehicle's braking signal includes: obtaining the vehicle's acceleration or deceleration state based on the brake pedal signal and / or the accelerator / accelerator pedal signal; and determining the real-time damping of the magnetorheological fluid based on the vehicle's acceleration or deceleration state. Specifically, the piston rod 23 of the magnetorheological hydraulic cylinder 20, when extending or retracting, exerts a damping force to counteract / mitigate the backward or forward pitch caused by the vehicle's acceleration or deceleration state due to braking, thereby reducing dizziness. In this embodiment, the real-time damping of the magnetorheological fluid is adjusted specifically by adjusting the current values ​​of the first and second electromagnetic elements. In this embodiment, the correspondence between the vehicle's braking signal, the vehicle's acceleration / deceleration state, and the real-time damping of the magnetorheological fluid can be determined through analysis and experimental means, thereby enabling real-time reading and acquisition of the real-time damping of the magnetorheological fluid during the control process. Of course, real-time analysis can also be used to obtain the real-time damping of the magnetorheological fluid, which is not limited and can be determined based on actual conditions.

[0166] In the embodiment of the present disclosure, before the shock absorption mode and / or the anti-sickness mode are activated, a safety posture control may be performed to ensure that the seat posture angle is a safety posture angle.

[0167] In some embodiments, a control method for a zero-gravity seating system, involving cradle mode control logic, further includes:

[0168] Obtain the current vehicle status; this step is the same as the aforementioned step S21 and will not be repeated here.

[0169] When the current vehicle state is the parking state, in response to the cradle mode control signal, controlling the zero-gravity seat system to activate the cradle mode;

[0170] The cradle mode includes: controlling the cyclic switching of the flow direction of the magnetorheological fluid, and controlling the piston rod 23 of the magnetorheological hydraulic cylinder 20 to extend and retract reciprocally, so that the seat posture reciprocates between the cradle starting posture and the cradle deployment posture.

[0171] The cradle's initial position can be the seat's retracted position or the deployed position at a first angle. The first angle can be very small, so that the cradle's initial position is the seat's minimum deployed position. For example, the first angle can be 1°, 2°, or 3°. The cradle's deployed position is generally set to the maximum deployed position, but a non-maximum deployed position can also be set, depending on the actual situation.

[0172] Optionally, controlling the cyclic switching of the flow direction of the magnetorheological fluid includes: controlling the control valve 25 to be normally open, and controlling the hydraulic pump 26 to operate reciprocally according to the cradle mode to achieve the cyclic switching of the flow direction of the magnetorheological fluid.

[0173] The cradle mode of this embodiment provides a smooth, non-impact, and non-pause cradle experience similar to that of a mother rocking a cradle. Users can adjust the rocking speed, amplitude, and softness according to their preferences.

[0174] Optionally, combined Figure 12 The cradle mode shown in Table 3 controls the cyclic switching of the flow direction of the magnetorheological fluid and controls the piston rod 23 of the magnetorheological hydraulic cylinder 20 to reciprocate and retract, so that the seat posture reciprocates between the cradle starting posture and the cradle deployment posture. A cycle between the cradle starting posture and the cradle deployment posture includes: controlling the seat posture to the cradle starting posture; starting from the cradle starting posture, controlling the piston rod 23 to extend and the extension process is sequentially controlled to accelerate extension ( Figure 12 1→2 in the above), uniform speed extension ( Figure 12 2→3) and deceleration extension ( Figure 12 3→4), to the seat posture to the cradle deployment posture; then the piston rod 23 is controlled to retract and the retraction process is controlled to accelerate retraction ( Figure 12 4→5), uniform speed retraction ( Figure 12 5→6) and deceleration retraction ( Figure 126→1) until the seat posture returns to the cradle starting posture.

[0175] Specifically, the piston is controlled to extend and the extension process is controlled in sequence to accelerated extension, uniform speed extension and decelerated extension, including: controlling the control valve 25 to be normally open, controlling the hydraulic pump 26 to operate in a first direction (for example, forward rotation), and sequentially controlling the damping of the magnetorheological fluid to decrease (to accelerate the extension of the piston rod), maintain constant (to extend the piston rod at a uniform speed) and increase (to decelerate the extension of the piston rod); when the seat posture is changed to the cradle deployment posture, controlling the hydraulic pump 26 to operate in a second direction (for example, reverse rotation), and sequentially controlling the damping of the magnetorheological fluid to decrease (to accelerate the retraction of the piston rod), maintain constant (to retract the piston rod at a uniform speed) and increase (to decelerate the retraction of the piston rod).

[0176] Table 3

[0177] 1→→2 2→→3 3→→4 4→→5 5→→6 6→→1 hydraulic pump Forward Forward Forward Reversal Reversal Reversal control valves Open Open Open Open Open Open model Cradle mode status Keep mode state Cradle mode status Cradle mode status Keep mode state Cradle mode status

[0178] In this embodiment, after the cradle mode is turned on, the actions are performed according to the set action sequence, and the cradle action speed and shaking amplitude can be changed to improve the user experience.

[0179] In some embodiments, a control method for a zero-gravity seat system further includes: obtaining current position information of the piston 22 in the magnetorheological hydraulic cylinder 20 based on the current seat posture of the seat occupant; and suggesting a correspondence between the current seat occupant and the current position information, and storing the correspondence. This implements the memory and recall functions of a conventional memory seat.

[0180] It is understood that the control method of the disclosed embodiment involves multiple control logics, each of which can be implemented independently or simultaneously. When multiple control logics conflict, priorities can be set as needed. For example, among the multiple control logics in the vehicle's driving state, the collision control logic takes precedence over the shock absorption mode control logic and the anti-sickness mode control logic. The anti-sickness mode control logic and the shock absorption mode control logic can determine their priorities based on actual conditions. Of course, this is not limited to this priority setting and can be determined based on actual functional requirements.

[0181] The execution subject of the control method for the zero-gravity seat system in the embodiment of the present disclosure may be a control device, which may be independently provided or integrated into the vehicle control system, and is determined according to actual conditions.

[0182] In the control method for the zero-gravity seat system of the embodiment of the present disclosure, the magnetorheological fluid is in a maintained state as a default state, and the control valve 25 of the magnetorheological hydraulic cylinder 20 and the hydraulic pump 26 are closed as a default state.

[0183] Combine Figure 13As shown, an embodiment of the present disclosure provides a control device 100 for a zero-gravity chair system, comprising a processor 100 and a memory 101. Optionally, the device may further comprise a communication interface 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via the bus 103. The communication interface 102 may be used for information transmission. The processor 100 may call the logic instructions in the memory 101 to execute the control method for the zero-gravity chair system of the above embodiment.

[0184] In addition, the logic instructions in the memory 101 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0185] Memory 101, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of the present disclosure. Processor 100 executes the program instructions / modules stored in memory 101 to perform functional applications and data processing, thereby implementing the methods for... in the aforementioned embodiments.

[0186] The memory 101 may include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function; the data storage area may store data generated based on the use of the terminal device. Furthermore, the memory 101 may include high-speed random access memory and non-volatile memory.

[0187] An embodiment of the present disclosure provides a zero-gravity vehicle seat control system, comprising the zero-gravity seat system of any of the aforementioned embodiments and a control device for the zero-gravity seat system of any of the aforementioned embodiments, for controlling the zero-gravity seat system to implement the control method for the zero-gravity seat system of any of the aforementioned embodiments.

[0188] The zero-gravity vehicle seat control system of the disclosed embodiment includes the aforementioned zero-gravity seat system, and therefore possesses all the technical effects of the aforementioned zero-gravity seat system, which will not be elaborated here.

[0189] An embodiment of the present disclosure provides a vehicle, comprising the zero-gravity seat system of any of the aforementioned embodiments, and / or the aforementioned zero-gravity vehicle seat control system.

[0190] The zero-gravity vehicle seat control system of the disclosed embodiment includes the aforementioned zero-gravity seat system, and therefore possesses all the technical effects of the aforementioned zero-gravity seat system, which will not be elaborated here.

[0191] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned control method for a zero-gravity seat system.

[0192] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0193] The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program code, or a transient storage medium.

[0194] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include plural forms. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups of these. In the absence of further restrictions, an element defined by the sentence "comprising a..." does not exclude the presence of other identical elements in the process, method or device that includes the element. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments can be referenced to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can be found in the description of the method part.

[0195] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. The technicians will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0196] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical functional division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, and can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. In addition, the functional units in the embodiments of the present disclosure may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0197] The flowcharts and block diagrams in the accompanying drawings show the possible implementation architectures, functions and operations of the systems, methods and computer program products according to the embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of the code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical functions. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified function or action, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A zero-gravity seating system, characterized in that: include: The seat bottom frame includes a bottom frame skeleton and a movable slide rail. The bottom frame is rotatably arranged on the movable slide rail. The movable slide rail is used to be slidably connected to the fixed slide rail of the vehicle frame to realize the front and rear sliding of the seat bottom frame. The magnetorheological hydraulic cylinder includes a cylinder body and a piston rod, wherein the inner cavity of the cylinder is filled with magnetorheological fluid; the cylinder body is arranged on a movable slide rail, and the piston rod is connected to the tilt driving arm of the bottom frame skeleton; When the piston rod of the magnetorheological hydraulic cylinder extends, it drives the front side of the bottom frame to lift up, so that the seat posture is unfolded; when the piston rod retracts, it drives the front side of the bottom frame to lower, so that the seat posture is retracted; Among them, the magnetorheological hydraulic cylinder includes: The cylinder body includes an inner cylinder, wherein the inner cylinder is provided with a first electromagnetic element, which can generate a magnetic field when energized to adjust the damping of the magnetorheological fluid filled in the inner cavity of the inner cylinder; The piston is disposed in the inner cylinder to divide the inner cavity of the inner cylinder into a first chamber and a second chamber, and a flow channel is provided on the piston to pass through the first chamber and the second chamber; the piston is provided with a second electromagnetic element, which can generate a magnetic field when energized to adjust the damping of the magnetorheological fluid in the flow channel; A piston rod, one end of which is connected to the piston, and the other end of which is passed through the first end sealing seat of the inner cylinder to the outside; A bypass pipeline is provided with a first opening and a second opening on the inner cylinder wall corresponding to the first chamber and the second chamber respectively, and both ends of the pipeline are connected to the first opening and the second opening respectively; The control valve is connected to the bypass line to control the conduction or cutoff of the bypass line; A hydraulic pump is connected to the bypass line, and a first-direction flow or a second-direction flow in the bypass line is achieved by controlling the direction of the hydraulic pump; wherein the first-direction flow is the flow of the magnetorheological fluid from the first chamber to the second chamber, and the second-direction flow is the flow of the magnetorheological fluid from the second chamber to the first chamber.

2. The zero-gravity chair system according to claim 1, wherein: The cylinder body also includes: The outer cylinder, the first end of the inner cylinder is passed through the second end cover of the outer cylinder so that part of the inner cylinder is sleeved in the outer cylinder; wherein the other end of the piston rod is passed through the first end sealing seat of the inner cylinder and extends to the outside through the first end cover of the outer cylinder; The buffer structure has one end arranged on the first end sealing seat of the inner cylinder and the other end arranged on the second end cover of the outer cylinder.

3. A control method for a zero-gravity seat system, used for the zero-gravity seat system according to claim 1 or 2, characterized in that: Control methods, including: In response to the attitude adjustment signal, the piston rod of the magnetorheological hydraulic cylinder of the zero-gravity seat system is controlled to extend or retract, so that the seat attitude is deployed to increase the seat attitude angle or retracted to reduce the seat attitude angle.

4. The control method for a zero-gravity seat system according to claim 3, characterized in that: Also includes: Get the current vehicle status; When the vehicle is in motion and the seat is in an unfolded position, the current posture angle of the seat is obtained; when the current posture angle is greater than the safe posture angle, a posture recovery signal is triggered; wherein the safe posture angle is a safe posture angle that matches the human body characteristics of the current occupant; In response to the posture recovery signal, the piston rod of the magnetorheological hydraulic cylinder is controlled to retract, so that the seat posture is recovered to reduce the posture angle of the seat to a safe posture angle.

5. The control method for a zero-gravity seat system according to claim 3, characterized in that: Also includes: Get the current vehicle status; When the current vehicle state is a driving state, obtaining a collision signal; When the collision signal is a head-on collision signal and the seat is in the deployed posture, a posture head-on collision recovery signal is triggered; in response to the posture head-on collision recovery signal, the magnetorheological fluid in the magnetorheological hydraulic cylinder is controlled to adjust to the head-on collision state and the piston rod is controlled to retract, so that the seat posture is recovered to reduce the seat posture angle to the seat retracted posture; in the head-on collision state, the damping of the magnetorheological fluid is minimum; When the collision signal is a head-on collision signal and the seat is in a retracted position, a head-on collision energy absorption signal is triggered; In response to the posture head-on collision energy absorption signal, during the head-on collision rebound stage, the magnetorheological fluid in the magnetorheological hydraulic cylinder is controlled to be adjusted to a head-on collision energy absorption state, so that the piston rod can extend to absorb energy or recover energy; the head-on collision energy absorption state is when the damping of the magnetorheological fluid is at the first damping between the maximum damping and the minimum damping; when the collision signal is a rear-collision signal, the posture rear-collision energy absorption signal is triggered; in response to the posture rear-collision energy absorption signal, the magnetorheological fluid in the magnetorheological hydraulic cylinder is controlled to be adjusted to the rear-collision energy absorption state, so that the piston rod can extend to absorb energy or recover energy; wherein, the rear-collision energy absorption state is when the damping of the magnetorheological fluid is at the second damping between the maximum damping and the minimum damping.

6. A control method for a zero-gravity seat system according to any one of claims 3 to 5, characterized in that: Also includes: Get the current vehicle status; When the vehicle is in a driving state and the seat is in an unfolded position, the control starts the shock absorption mode; Obtaining real-time road condition signals and / or real-time vehicle vibration signals; According to the real-time road condition signal and / or the real-time vehicle vibration signal, the real-time damping of the magnetorheological fluid is determined, and the damping of the magnetorheological fluid in the magnetorheological hydraulic cylinder is controlled to be dynamically adjusted according to the real-time damping.

7. A control method for a zero-gravity seat system according to any one of claims 3 to 5, characterized in that: Also includes: Get the current vehicle status; When the vehicle is in a driving state and the seat is in an unfolded position, the anti-dizziness mode is activated; Obtain vehicle braking signal; According to the vehicle braking signal, the real-time damping of the magnetorheological fluid is determined, and the damping of the magnetorheological fluid in the magnetorheological hydraulic cylinder is controlled to be dynamically adjusted according to the real-time damping.

8. A control method for a zero-gravity seat system according to any one of claims 3 to 5, characterized in that: Also includes: Get the current vehicle status; When the current vehicle state is a parking state, in response to the cradle mode control signal, controlling the zero-gravity seat system to activate the cradle mode; Among them, the cradle mode includes: controlling the cyclic switching of the flow direction of the magnetorheological fluid, and controlling the piston rod of the magnetorheological hydraulic cylinder to extend and retract reciprocally, so that the seat posture reciprocates between the cradle starting posture and the cradle expansion posture.

9. The control method for a zero-gravity seat system according to claim 8, characterized in that: A cycle in which the seat position cycles back and forth between the cradle initial position and the cradle deployed position, including: Control the seat posture to the cradle starting posture; Taking the initial posture of the cradle as the starting point, the piston rod is controlled to extend, and the extension process is controlled in sequence to accelerated extension, uniform speed extension and decelerated extension, until the seat posture is changed to the cradle deployed posture; then the piston rod is controlled to retract, and the retraction process is controlled in sequence to accelerated retraction, uniform speed retraction and decelerated retraction, until the seat posture returns to the initial posture of the cradle.

10. A control device for a zero-gravity seat system, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to perform the control method for a zero-gravity seat system according to any one of claims 3 to 9 when executing the program instructions.

11. A zero-gravity vehicle seat control system, characterized in that: include: The zero-gravity seating system according to claim 1 or 2; The control device for a zero-gravity seat system as described in claim 10 is used to control the zero-gravity seat system to implement the control method for a zero-gravity seat system as described in any one of claims 3 to 9.

12. A vehicle, characterized in that: include: The zero-gravity seating system according to claim 1 or 2; and / or, The zero-gravity vehicle seat control system of claim 11.

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