Active shock absorber assembly based on vehicle height adjustment, control system and method and vehicle
The active damper assembly, which uses a motor to drive the gear rotation, solves the problems of slow response, complex structure, and high cost of existing vehicle height adjustment systems. It achieves fast, accurate, and reliable vehicle height adjustment, reduces energy consumption, and avoids the risk of air and oil leaks.
Patent Information
- Application Number
- CN202511546806.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2026-01-20
AI Technical Summary
Existing vehicle height adjustment systems have slow response speed, complex structure, high cost and insufficient reliability, especially in low temperature environments where there is a risk of air or oil leakage.
It adopts an active shock absorber assembly based on vehicle height adjustment. The shock absorber achieves precise linear motion by driving the gear rotation with a motor. Combined with mechanical transmission and integrated design, it avoids the risk of air or oil leakage. It has a compact structure and low cost.
It achieves fast and precise vehicle height adjustment, has a simple and compact structure, avoids the risk of air leakage, icing or oil leakage, improves energy efficiency and reduces costs.
Smart Images
Figure CN121361291A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of shock absorber, in particular to an active shock absorber assembly based on vehicle height adjustment, a control system and method and a vehicle. BACKGROUND
[0002] In the field of automobiles, the ground clearance of the chassis of a vehicle (i.e. the vehicle height) is a key parameter affecting the passability, stability and aerodynamic performance of the vehicle. By increasing the ground clearance, the passability can be improved; by reducing the ground clearance, the stability, handling and wind resistance can be improved.
[0003] In the case of using a traditional vehicle height adjustment system such as an air suspension, the height of the air bag of the air suspension is changed by charging and discharging air, thereby realizing the function of vehicle height adjustment. However, such vehicle height adjustment systems have the disadvantages of slow response speed, complex structure, high cost, reduced reliability in low temperature environments, and the risk of air leakage. In addition, in related technologies, the length of the shock absorber is changed by a hydraulic mechanism, but it also has the problems of complex structure, high sealing requirement and high maintenance cost. Therefore, there is an urgent need for an active vehicle height adjustment technology scheme that is fast in response, compact in structure, high in reliability and relatively low in cost. SUMMARY
[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides an active shock absorber assembly based on vehicle height adjustment, a control system and method and a vehicle, which is fast in response, can quickly and accurately adjust the vehicle height, and has a simple and compact structure, high reliability and low cost.
[0005] The first aspect of the present application provides an active shock absorber assembly based on vehicle height adjustment, comprising: a shock absorber extending in the up-down direction, the lower end of the shock absorber being fixedly provided with a rack extending in the up-down direction; a housing provided with a container cavity with an opening facing upward, the lower end of the shock absorber extending into the container cavity and being in sliding connection with the inner peripheral surface of the container cavity in the up-down direction, the lower end of the housing being fixedly provided with a connecting fork, the connecting fork being provided with a mounting hole extending through in the first direction; A driving device is obliquely arranged from top to bottom to the shell, and comprises a motor, a speed reducer and a gear, the speed reducer is fixedly connected with the shell, an input shaft of the speed reducer is fixedly connected with an output shaft of the motor, an output shaft of the speed reducer is coaxially fixedly provided with the gear, the gear is in meshing connection with the rack, a central axis of the gear extends at an acute angle with respect to an extending direction of the rack and an extending direction of the mounting hole, and the motor is configured to drive the gear to rotate, so that the rack drives the shock absorber to move in the up-down direction, thereby achieving height adjustment of the shock absorber, and the first direction is perpendicular to the up-down direction.
[0006] The active shock absorber assembly based on vehicle height adjustment has at least the following beneficial effects: when the shock absorber and the shell are connected in the up-down sliding mode, the motor drives the gear to rotate, which is converted into the precise linear motion of the rack, and finally drives the shock absorber to move in the up-down direction, thereby achieving stepless adjustment of the height position of the shock absorber, which is conducive to the active adjustment of the vehicle height; moreover, the driving device is arranged obliquely from top to bottom to the shell, and the central axis of the gear extends at an acute angle with respect to the extending direction of the rack and the extending direction of the mounting hole, so that the size of the active shock absorber assembly in the horizontal direction can be reduced, the structure of the active shock absorber assembly is more compact, the arrangement space is saved, other parts of the vehicle can be avoided, and the active shock absorber assembly is suitable for being installed on the vehicle; at the same time, the driving device has high reliability, and the risk of air leakage and icing of the existing air suspension and the risk of oil leakage of the existing hydraulic mechanism are avoided; in addition, the motor only consumes electric energy during adjustment, and does not need to continuously operate the air compressor to maintain the pressure as the existing air suspension, which helps to improve energy efficiency and reduce cost.
[0007] In some embodiments of the present application, the active shock absorber assembly based on vehicle height adjustment further comprises a buffer pad connected with the inner bottom surface of the cavity, and the buffer pad is configured to buffer the rack.
[0008] In some embodiments of the present application, the active shock absorber assembly based on vehicle height adjustment further comprises a corrugated telescopic sleeve configured to be telescopic in the up-down direction, a lower end of the corrugated telescopic sleeve is sleeved on the shell and fixedly connected with an upper end of the shell, and an upper end of the corrugated telescopic sleeve is sleeved on the shock absorber and fixedly connected with an outer circumferential surface of the shock absorber.
[0009] In some embodiments of the present application, a lower end of the rack is fixedly provided with a guide ring, an outer circumferential surface of the guide ring is in contact with and slidingly connected with an inner circumferential surface of the cavity in the up-down direction, and the shock absorber and the cavity are coaxially arranged; and / or, The lower end of the shock absorber is fixed with a limiting ring, the limiting ring is arranged in the cavity, and the limiting ring is configured to be clamped with the opening of the cavity to limit the maximum height position of the shock absorber.
[0010] In some embodiments of the present application, the driving device further comprises a controller, which is arranged on the side of the motor away from the reducer and is electrically connected with the motor, and the motor, the reducer and the controller are connected to form an integrated structure.
[0011] The second aspect of the present application provides a control system, comprising: a vehicle speed sensor for acquiring vehicle speed data of the vehicle; a driving mode selector for switching driving modes, the driving modes including a comfort mode, a sports mode and an off-road mode; a road condition detection component for acquiring road conditions, the road condition detection component being an acceleration sensor or a vibration sensor, and the road conditions including flat road, ordinary road and bumpy road; The active shock absorber assembly based on vehicle height adjustment according to the first aspect of the present application, the controller is electrically connected to the vehicle speed sensor, the driving mode selector and the road condition detection component respectively, and the controller is configured to control the working state of the motor according to the driving mode, the vehicle speed data and the road conditions, so as to control the height position of the shock absorber and realize vehicle height control.
[0012] The control system according to the second aspect of the present application has at least the following beneficial effects: the vehicle speed data of the vehicle is acquired by the vehicle speed sensor, the road conditions are acquired by the road condition detection component, and the driving mode switched by the user is acquired by the driving mode selector, then the controller can adjust the height position of the shock absorber according to the vehicle speed, the road conditions and the driving mode, so as to realize accurate control of the vehicle height, optimize the performance of the vehicle and improve the passability, stability and comfort of the vehicle.
[0013] In some embodiments of the present application, the controller is configured to: when the driving mode is the comfort mode and the vehicle is running at high speed on flat road or ordinary road, control the motor to run and drive the shock absorber to descend by a first set distance, so as to realize vehicle height reduction; when the driving mode is the comfort mode and the vehicle is running at low speed on bumpy road, control the motor to run and drive the shock absorber to ascend by a second set distance, so as to realize vehicle height increase; when the driving mode is the off-road mode and the vehicle is running at low speed or medium speed on bumpy road or ordinary road, control the motor to run and drive the shock absorber to ascend by a third set distance, so as to realize vehicle height increase; When the driving mode is the sport mode, the motor is controlled to operate and drive the shock absorber to descend by a fourth set distance, so as to realize the vehicle height reduction.
[0014] In some embodiments of the present application, the control system is configured to control four motors to operate and drive the corresponding shock absorbers to simultaneously ascend or descend, so as to realize the synchronous adjustment of the vehicle height, or control part of the motors to operate and drive the corresponding shock absorbers to ascend or descend, so as to realize the vehicle posture adjustment, when the vehicle is equipped with four active shock absorber assemblies based on the vehicle height adjustment.
[0015] The third aspect of the present application provides a control method based on the active shock absorber assembly based on the vehicle height adjustment as described in the first aspect of the present application, and the control method comprises the following steps: acquiring the driving mode, the vehicle speed data and the road surface condition; When the driving mode is the comfort mode, and the vehicle is driven at high speed on the flat road or the ordinary road, the motor is controlled to operate and drive the shock absorber to descend by a first set distance, so as to realize the vehicle height reduction. When the driving mode is the comfort mode, and the vehicle is driven at low speed on the bumpy road, the motor is controlled to operate and drive the shock absorber to ascend by a second set distance, so as to realize the vehicle height increase. When the driving mode is the off-road mode, and the vehicle is driven at low speed or medium speed on the bumpy road or the ordinary road, the motor is controlled to operate and drive the shock absorber to ascend by a third set distance, so as to realize the vehicle height increase. When the driving mode is the sport mode, the motor is controlled to operate and drive the shock absorber to descend by a fourth set distance, so as to realize the vehicle height reduction. Or, acquiring the requirement information input by the user; controlling four active shock absorber assemblies based on the vehicle height adjustment of the vehicle to operate simultaneously according to the requirement of the synchronous adjustment of the vehicle height, so as to realize the uniform height adjustment of the four wheels of the vehicle. controlling the corresponding active shock absorber assembly based on the vehicle height adjustment to operate according to the requirement of the leveling or the anti-roll, so as to realize the automatic leveling or the dynamic posture control of the vehicle.
[0016] According to the control method of the third aspect of the present application, at least the following beneficial effects are achieved: after obtaining the data of driving mode, vehicle speed and road surface condition, the target vehicle height is calculated according to the type of driving mode, the high and low of vehicle speed and the different road surface conditions, so as to realize the intelligent control of the vehicle height of the vehicle through the operation of the active damper assembly, improve the performance of the vehicle in the driving process and meet the driving requirements of the user; optionally, according to the requirement information input by the user, if it is the requirement of synchronous adjustment of the overall vehicle height, the four active damper assemblies of the vehicle are uniformly controlled to realize the synchronous lifting and lowering of the overall vehicle height and meet the basic passability and aerodynamic requirement, if it is the leveling requirement or the anti-roll requirement, the independent control is performed on part of the active damper assemblies to realize the automatic leveling function of the vehicle to keep the vehicle posture when the load is uneven or realize the dynamic posture control of the vehicle to suppress the roll when the vehicle is turning.
[0017] The fourth aspect of the present application provides a vehicle comprising the active damper assembly based on vehicle height adjustment according to the first aspect of the present application or the control system according to the second aspect of the present application.
[0018] According to the vehicle of the fourth aspect of the present application, at least the following beneficial effects are achieved: the vehicle can automatically or manually adjust the overall vehicle height or the single wheel height according to the vehicle speed, road condition and the intention of the driver and other information by adopting the active damper assembly or the control system, so as to optimize the performance of the vehicle and meet the driving requirements of the driver.
[0019] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. The objects and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 is a perspective structural schematic view of the active damper assembly based on vehicle height adjustment according to the embodiment of the present application when equipped with a coil spring; Figure 2 is a perspective structural schematic view of the active damper assembly based on vehicle height adjustment according to the embodiment of the present application; Figure 3 is a partial sectional view schematic view of the active damper assembly based on vehicle height adjustment according to the embodiment of the present application; Figure 4 is a partial sectional view schematic view of the active damper assembly based on vehicle height adjustment according to the embodiment of the present application from another perspective; Figure 5 is a structural schematic view of the control system according to the embodiment of the present application; Figure 6 is a flowchart of a control method according to an embodiment of the present application; Figure 7 is a flowchart of a control method according to another embodiment of the present application.
[0021] The reference signs are as follows: 100, shock absorber; 200, housing; 210, cavity; 300, driving device; 310, motor; 320, controller; 330, gear; 400, connecting fork; 410, mounting hole; 500, corrugated telescopic sleeve; 600, coil spring; 700, rack; 810, buffer pad; 820, guide ring; 830, limiting ring; 910, first clamp; 920, second clamp. DETAILED DESCRIPTION
[0022] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which the same or similar components are denoted by the same or similar reference signs throughout. The embodiments described below are examples for explaining the present application and should not be construed as limiting the present application.
[0023] In the description of the present application, it should be understood that the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0024] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0025] Reference is made below to Figures 1 to 7 The active shock absorber assembly based on vehicle height adjustment, control system and method and vehicle according to embodiments of the present application are described.
[0026] As Figures 1 to 4 shown, the active shock absorber assembly based on vehicle height adjustment according to the first embodiment of the first aspect of the present application can be applied to a vehicle, providing an active damping function, and can also quickly, accurately and actively adjust the vehicle height. The active shock absorber assembly of the present embodiment has the advantages of fast response, simple and compact structure, high reliability and low cost.
[0027] The active damper assembly based on vehicle height adjustment has a first direction, a second direction and an up-down direction, wherein the first direction, the second direction and the up-down direction are perpendicular to each other. In the embodiment, it is assumed that the first direction is the left-right direction, and the second direction is the front-rear direction.
[0028] As shown in Figures 1 to 4 The active damper assembly based on vehicle height adjustment includes a damper 100, a housing 200 and a driving device 300.
[0029] The length of the damper 100 extends in the up-down direction, the upper end of the damper 100 is connectable to a vehicle, and the lower end of the damper 100 is provided with a rack 700, the length of the rack 700 extends in the up-down direction, and the upper end of the rack 700 is fixedly connected to the lower end of the damper 100.
[0030] The housing 200 is arranged below the damper 100, the housing 200 is provided with a cavity 210, the opening of the cavity 210 is open upward, and the cavity 210 can accommodate the rack 700 and the lower end of the damper 100. In the embodiment, the cavity 210 is cylindrical, and the housing 200 looks like a circle in the up-down direction. The lower end of the damper 100 extends into the cavity 210 of the housing 200, and the lower end of the damper 100 is slidingly connected to the inner circumferential surface of the cavity 210 in the up-down direction, so that the damper 100 can stably move up and down relative to the housing 200. The lower end of the housing 200 is provided with a connecting fork 400, the connecting fork 400 can be fixedly arranged at the lower end of the housing 200 by welding, the connecting fork 400 is provided with a mounting hole 410, the mounting hole 410 extends through in the first direction, and the mounting hole 410 can be used to install the connecting fork 400 on the vehicle by bolts. It can be understood that the connecting fork 400 looks like an inverted U shape in the second direction, the connecting fork 400 has two connecting arms which are symmetrically arranged and spaced apart in the first direction, the connecting arms are provided with the mounting hole 410, and the mounting hole 410 is a circular hole.
[0031] The driving device 300 is arranged on one side of the housing 200 in the horizontal direction, and the driving device 300 is inclined from top to bottom towards the housing 200. Specifically, the driving device 300 includes a motor 310, a speed reducer, and a gear 330. The speed reducer is fixedly connected to the housing 200, and is located between the housing 200 and the motor 310. The input shaft of the speed reducer is fixedly connected to the output shaft of the motor 310. The output shaft of the speed reducer is provided with the gear 330, which is coaxially arranged with the output shaft of the speed reducer and is fixedly connected to the output shaft of the speed reducer. The gear 330 is in meshing connection with the rack 700. The motor 310 is configured to drive the gear 330 to rotate, so that the rack 700 drives the shock absorber 100 to move in the up-down direction, thereby achieving height adjustment of the shock absorber 100. Therefore, when the motor 310 operates, the motor 310 can drive the gear 330 to rotate through the speed reducer, and in turn drive the rack 700 to move in the up-down direction to drive the shock absorber 100 in the up-down direction, so as to accurately control the height position of the shock absorber 100.
[0032] Moreover, the central axis extension direction of the gear 330 forms an acute angle with the extension direction of the rack 700, the central axis extension direction of the gear 330 forms an acute angle with the extension direction of the mounting hole 410, and the central axis extension direction of the gear 330 is eccentrically arranged with the central axis of the cavity 210 extending in the up-down direction. In this way, the mounting position of the driving device 300 can be reasonably arranged, the layout space of the active shock absorber assembly on the vehicle can be saved, the active shock absorber assembly can avoid other parts of the vehicle when assembled on the vehicle, and the active shock absorber assembly is convenient to disassemble, replace, and maintain. In this embodiment, the output shaft of the speed reducer is mounted on the housing 200 through a bearing.
[0033] It can be understood that the driving device 300 adopts a purely mechanical gear and rack transmission mode, and the response speed is much faster than the existing air suspension inflation and deflation speed and the hydraulic system pressure building speed, and can realize near real-time vehicle height adjustment. Moreover, the risks of air leakage, icing of the existing air suspension, and oil leakage of the hydraulic mechanism can be avoided, the mechanical transmission structure is more solid and durable, the environmental adaptability is stronger, and the structural reliability can be improved.
[0034] The motor 310 is used as the only power source, the rotation angle of the motor 310 has a strict linear correspondence with the linear displacement of the rack 700, the vehicle height change amount can be accurately controlled by controlling the rotation angle of the motor 310, and the precision is much higher than that of the existing pneumatic system or hydraulic system. Moreover, the motor 310 only consumes electric energy during vehicle height adjustment, unlike the existing air suspension which needs to continuously operate the air compressor to maintain the pressure, so that the energy utilization efficiency can be improved. Therefore, the motor 310 has the advantages of high control precision, fast response, good reliability, and controllable energy consumption, and can provide stable and reliable torque output.
[0035] AsFigure 1 As shown, the shock absorber 100 can be connected with the coil spring 600, such as the two are designed in one, to form an active shock absorber assembly with the function of adjusting the height of the vehicle. The active shock absorber assembly is designed in the form of electromechanical integration, and can work through the gear rack mechanism driven by the motor 310, quickly and accurately adjust the length of the shock absorber 100 extending out of the shell 200, so as to realize the active adjustment of the height of the vehicle.
[0036] In the active shock absorber assembly based on the height adjustment of the vehicle provided by the first aspect of the present application, since the shock absorber 100 and the shell 200 are connected in the form of sliding up and down, the motor 310 can be controlled to rotate the gear 330 driven by the motor 310, thereby converting into the precise linear motion of the rack 700, and finally directly pushing or pulling the shock absorber 100, so that the shock absorber 100 can move in the up and down direction, thereby quickly and accurately adjusting the height position of the shock absorber 100, realizing the stepless adjustment of the length of the active shock absorber assembly, and facilitating the active adjustment of the height of the vehicle.
[0037] Moreover, the driving device 300 is arranged in the form of inclining from top to bottom to the shell 200, and the central axis of the gear 330 extends in an acute angle with the extension direction of the rack 700, and the central axis of the gear 330 extends in an acute angle with the extension direction of the mounting hole 410, so that the size of the active shock absorber assembly in the horizontal direction can be reduced, the structure of the active shock absorber assembly is more compact, the layout space is saved, other parts of the vehicle can be avoided, and the active shock absorber assembly is suitable for being installed on the vehicle; at the same time, the driving device 300 has high reliability, and the risk of air leakage and icing of the existing air suspension and the risk of oil leakage of the existing hydraulic mechanism are avoided.
[0038] In addition, the motor 310 only consumes electric energy during adjustment, and does not need to continuously operate the air compressor to maintain the pressure as the existing air suspension, which helps to improve energy efficiency and reduce cost.
[0039] In some embodiments, as shown in Figure 4 As shown, the active shock absorber assembly based on the height adjustment of the vehicle further comprises a buffer pad 810. The buffer pad 810 is arranged in the cavity 210 of the shell 200, and the buffer pad 810 is fixedly connected with the inner bottom surface of the cavity 210, and the buffer pad 810 is configured to buffer the rack 700. In this embodiment, the buffer pad 810 is in the form of a circular plate and is laid on the inner bottom surface of the cavity 210, and the buffer pad 810 can be made of rubber or silicone. When the rack 700 is lowered to the position, the buffer pad 810 can contact the lower surface of the rack 700 and buffer the rack 700 by deforming, so as to avoid the hard collision between the rack 700 and the inner bottom surface of the shell 200.
[0040] In some embodiments, as shown inFigures 1 to 4 As shown, the active damper assembly based on the vehicle height adjustment further comprises a bellows 500. The bellows 500 has a length extending in the up-down direction, and is configured to be stretchable in the up-down direction. The lower end of the bellows 500 is sleeved on the housing 200, and the lower end of the bellows 500 is fixedly connected with the upper end of the housing 200. The upper end of the bellows 500 is sleeved on the damper 100, and the upper end of the bellows 500 is fixedly connected with the outer circumferential surface of the damper 100.
[0041] In the embodiment, the bellows 500 can be made of rubber or silicone, etc. The upper end of the bellows 500 is fixedly installed on the damper 100 by the first clamp 910, and the lower end of the bellows 500 is fixedly installed on the housing 200 by the second clamp 920. In the process that the driving device 300 drives the damper 100 to move up and down relative to the housing 200, the lower end of the bellows 500 is fixed relative to the housing 200, and the upper end of the bellows 500 moves up and down with the damper 100, so that the bellows 500 can be stretched or shortened. The bellows 500 can play a good dustproof protection role, avoid the dust and impurities from the outside into the cavity 210 to affect the transmission effect between the rack 700 and the gear 330, and reduce the maintenance frequency.
[0042] In some embodiments, as shown in Figure 4 The lower end of the rack 700 is provided with a guide ring 820, which can be fixedly connected with the lower end of the rack 700 by welding. The guide ring 820 can be sleeved on the lower end of the rack 700, the outer circumferential surface of the guide ring 820 is in contact with the inner circumferential surface of the cavity 210, the outer circumferential surface of the guide ring 820 is slidably connected with the inner circumferential surface of the cavity 210 in the up-down direction, and the damper 100 and the cavity 210 are coaxially arranged. In the embodiment, the guide ring 820 is a circular ring, and the lower surface of the guide ring 820 is flush with the lower surface of the rack 700. There is a gap between the rack 700 and the inner circumferential surface of the cavity 210. Under the guidance of the guide ring 820, the damper 100 and the rack 700 can be smoothly and vertically lifted.
[0043] In some embodiments, as shown in Figure 4As shown, the lower end of the damper 100 is provided with a limiting ring 830, which is fixedly connected to the lower end of the damper 100 by welding. The limiting ring 830 can be sleeved on the lower end of the damper 100 and is arranged in the cavity 210. Moreover, the limiting ring 830 is configured to be clamped with the opening of the cavity 210 to limit the maximum height position of the damper 100. In the embodiment, the limiting ring 830 is a circular ring, which can be arranged in abutment with the inner circumferential surface of the cavity 210 and can slide up and down relative to the housing 200. The arrangement of the limiting ring 830 can prevent the lower end of the damper 100 and the rack 700 from being separated from the cavity 210, thereby ensuring that the damper 100 and the housing 200 maintain a good connection relationship.
[0044] In some embodiments, as Figures 1 to 4 As shown, the driving device 300 further includes a controller 320. The controller 320 is arranged on the side of the motor 310 away from the speed reducer, and the controller 320 is electrically connected with the motor 310. The motor 310, the speed reducer and the controller 320 are connected to form an integrated structure.
[0045] The motor 310, the speed reducer and the controller 320 are highly integrated to be packaged as one assembly. The speed reducer can be used to increase the output torque of the motor 310 to meet the power demand of lifting the vehicle body, and the controller 320 is responsible for signal reception and processing control. It can be understood that, by adopting the integrated and modular design of the driving device 300, the overall structure is greatly simplified, the structure becomes more compact, the chassis layout space of the vehicle is saved, the installation and arrangement are facilitated, the management cost and assembly complexity of parts are reduced, external wiring harnesses and connection interfaces are reduced, the failure rate is reduced, the overall replacement and maintenance are facilitated, and the system reliability is improved.
[0046] As Figures 1 to 5 As shown, the control system according to the second aspect of the embodiment of the application can be installed on a vehicle. The control system includes a vehicle speed sensor, a driving mode selector, a road condition detection component and an active damper assembly based on vehicle height adjustment according to the first aspect of the embodiment.
[0047] The vehicle speed sensor is used to obtain vehicle speed data. The driving mode selector is used to switch driving modes, wherein the driving modes include a comfort mode, a sport mode and an off-road mode. The road condition detection component is used to obtain road conditions, wherein the road condition detection component is an acceleration sensor or a vibration sensor, and the road conditions include flat road, ordinary road and bumpy road.
[0048] It can be understood that the vehicle speed sensor, the driving mode selector and the road condition detection component are existing products, which can be installed on the vehicle and obtain corresponding data. Among them, according to the collected vehicle speed data, three situations of high speed, medium speed and low speed can be divided, which can be divided according to the preset vehicle speed range.
[0049] The driving mode selector can switch the driving mode required by the user after receiving the instruction input by the user. The driving mode selector can allow the driver to change the driving characteristics of the vehicle according to the road and traffic conditions or personal driving preferences, so as to improve the comfort and safety of driving. The driving mode selector can perceive the current driving mode of the vehicle in real time and transmit a signal to the ECU (i.e. electronic control unit) of the vehicle, so as to adjust the power output of the engine, the gear shifting logic and the power system response of the vehicle according to the driving mode, so as to adapt to different driving scenarios.
[0050] The road condition information can be evaluated and obtained by directly monitoring the mechanical vibration of the vehicle through the vibration sensor, or by integrating the vibration displacement of the vehicle through the acceleration sensor. The difference between the ordinary road, the flat road and the bumpy road mainly lies in the road flatness, the driving experience and the influence on the vehicle. Among them, the surface flatness of the flat road meets the national standard, and there is no obvious pit or protrusion, so that the vehicle runs stably, and there is no obvious vibration or bumping feeling, and the comfort is high; the bumpy road has obvious pits, wave-shaped undulations and the like, so that the vehicle has a sustained high-frequency vibration during driving, the steering wheel needs to be held firmly, and the goods are easily displaced or the vehicle parts are damaged; the ordinary road is between the flat road and the bumpy road, and the ordinary road may have slight unevenness (such as local repair marks or slight undulations on the road), so that the vehicle has occasional slight bumping when driving.
[0051] The controller 320 can be electrically connected to the vehicle speed sensor, the driving mode selector and the road condition detection component through the vehicle bus or the hard-wired connection mode, so that the controller 320 can receive and process the electrical signals transmitted from the vehicle speed sensor, the driving mode selector and the road condition detection component in real time. Moreover, the controller 320 is configured to control the working state of the motor 310 according to the driving mode, the vehicle speed data and the road condition, so as to control the height position of the shock absorber 100 and realize the vehicle height control.
[0052] In a specific example, the controller 320 is configured to: when the driving mode is the comfort mode, and the vehicle runs at high speed on the flat road or the ordinary road, the motor 310 is controlled to run and drive the shock absorber 100 to descend by a first set distance, so as to realize the vehicle height reduction; When the driving mode is the comfort mode and the vehicle is running at low speed on a bumpy road, the motor 310 is controlled to operate and drive the shock absorber 100 to rise by a second set distance to achieve the vehicle height increase; When the driving mode is the off-road mode and the vehicle is running at low speed or medium speed on a bumpy road or a normal road, the motor 310 is controlled to operate and drive the shock absorber 100 to rise by a third set distance to achieve the vehicle height increase; When the driving mode is the sports mode, the motor 310 is controlled to operate and drive the shock absorber 100 to descend by a fourth set distance to achieve the vehicle height decrease.
[0053] It can be understood that the first set distance, the second set distance, the third set distance, and the fourth set distance can be set according to the actual design situation, which is not specifically limited here. By setting the vehicle speed sensor, the driving mode selector, and the road surface condition detection component, a data basis is provided for intelligent control of the control system. The control system can perceive the running state of the vehicle (such as the vehicle speed), the road surface excitation (such as the vibration acceleration), and the driver's intention (such as the driving mode), so that the vehicle height adjustment is no longer an isolated operation, but an intelligent behavior deeply integrated with the whole vehicle driving state.
[0054] Through the controller 320, multiple source input signals (such as the signals of the vehicle speed, the vibration acceleration, and the driving mode) are received and comprehensively processed, and according to the control strategy (or decision logic) predetermined in the controller 320, the target vehicle height is calculated and a decision is generated, and finally the control instruction is output, and the motor 310 is controlled to perform the corresponding action to drive the rack and pinion mechanism to operate, so that the actual vehicle height of the vehicle reaches the target vehicle height.
[0055] Such a design can realize adaptive intelligent control through the fusion of multiple sensors, so that the vehicle can automatically adapt to different driving scenes; for example, when the vehicle encounters a bumpy road in the off-road mode, the vehicle height is automatically increased to improve the passability; when the vehicle is cruising at high speed in the comfort mode, the vehicle height is automatically decreased to improve the stability and economy; this greatly enhances the functionality and user experience of the vehicle.
[0056] In some embodiments, the control system is configured to be able to control four motors 310 to operate and drive the corresponding shock absorbers 100 to rise and fall simultaneously to achieve synchronous adjustment of the whole vehicle height, or to control part of the motors 310 to operate and drive the corresponding shock absorbers 100 to rise and fall, to achieve vehicle attitude adjustment, when the vehicle is equipped with four active shock absorber assemblies based on vehicle height adjustment.
[0057] The control system has the function of simultaneously adjusting the height of four wheels of the vehicle, and also has the ability of independently adjusting the height of a single wheel, so that the control system can adjust the ground clearance of the whole vehicle, and can also realize the advanced function of adjusting the posture of the vehicle body (such as leveling, anti-roll), and finally make the control system have the ability of cooperative and independent control.
[0058] The control system can uniformly coordinate the height positions of the four shock absorbers 100 according to the needs of the user, or can independently control a single shock absorber 100. By uniformly controlling the four active shock absorber assemblies, the synchronous lifting and lowering of the height of the whole vehicle can be realized, and the basic passability and aerodynamics requirements of the vehicle can be met; by independently controlling individual active shock absorber assemblies, more advanced functions can be realized, such as automatic leveling of the vehicle to maintain the state of the vehicle body when the load of the vehicle is uneven, or dynamic posture control of the vehicle to prevent rolling when the vehicle passes through a curve, and to ensure driving safety, which can lay a foundation for active suspension systems and enhance the expandability of functions.
[0059] In the control system provided in the second aspect of the present application, the vehicle speed data of the vehicle is obtained through the vehicle speed sensor, the road condition is obtained through the road condition detection component, and the driving mode selected by the user is obtained through the driving mode selector. Then, the controller 320 can adjust the height position of the shock absorber 100 according to various information such as vehicle speed, road condition and driving mode, to realize accurate control of the vehicle height, thereby optimizing the performance of the vehicle and improving the passability, stability and comfort of the vehicle.
[0060] As shown in Figures 1 to 4 , Figure 6 and Figure 7 , the control method according to the third aspect of the present application is based on the active shock absorber assembly based on vehicle height adjustment according to the first aspect of the present application. The control method matches the active shock absorber assembly and can be adaptively and intelligently controlled according to various information such as the driving state of the vehicle (such as vehicle speed and road condition) and the intention of the driver, to automatically adjust and control the vehicle height, or manually adjust the height position of the whole vehicle or a single wheel by the user, so that the performance of the vehicle is optimized, thereby comprehensively improving the passability, stability and comfort of the vehicle.
[0061] As shown in Figure 6 , the control method includes the following steps: Step S11: Obtain the driving mode, vehicle speed data and road condition.
[0062] Step S12: When the driving mode is the comfort mode, and the vehicle is driving at high speed on flat road or ordinary road, control the motor 310 to run and drive the shock absorber 100 to lower by a first set distance, to realize the reduction of the vehicle height.
[0063] Step S13: When the driving mode is comfort mode and the vehicle is traveling at low speed on a bumpy road, control the motor 310 to run and drive the shock absorber 100 to rise a second set distance to achieve vehicle height increase.
[0064] Step S14: When the driving mode is off-road mode and the vehicle is traveling at low or medium speed on bumpy or ordinary roads, control the motor 310 to run and drive the shock absorber 100 to rise a third set distance to achieve vehicle height increase.
[0065] Step S15: When the driving mode is Sport mode, control motor 310 to run and drive shock absorber 100 to descend a fourth set distance to reduce vehicle height.
[0066] In this embodiment, by specifying and strategizing various working conditions encountered by the vehicle, the vehicle height can be controlled in a refined and intelligent manner.
[0067] In step S12, strategically lowering the vehicle height significantly lowers the vehicle's center of gravity, improving stability at high speeds. Simultaneously, reducing the vehicle's frontal area reduces wind resistance, improving fuel economy and optimizing aerodynamics. In step S13, strategically raising the vehicle height provides greater travel space for the suspension system, effectively buffering large impacts, protecting chassis components, and improving ride comfort on severely bumpy roads. In step S14, strategically raising the vehicle height greatly increases ground clearance, preventing chassis collisions with rough terrain and significantly improving passability and off-road capability. In step S15, when the vehicle is in Sport mode, strategically lowering the vehicle height provides a firmer, lower driving posture, lowering the center of gravity and reducing body roll during cornering, thereby improving handling precision and driving pleasure.
[0068] In addition, under most daily driving conditions (such as low to medium speeds and ordinary roads), by maintaining the vehicle's normal height, it achieves the best balance between comfort, stability and economy, meeting the driving needs of the vast majority of cities and highways.
[0069] After acquiring data such as driving mode, vehicle speed, and road conditions, the system calculates the target vehicle height according to a predetermined, multi-condition decision-making logic based on the type of driving mode, vehicle speed, and different road conditions. This is then achieved through the operation of the active damper assembly, enabling intelligent control of the vehicle's height to improve vehicle performance during driving and meet the user's driving needs.
[0070] In some embodiments, such as Figure 7 As shown, the control method also includes the following steps: Step S21: Obtain the requirement information input by the user.
[0071] Step S22: According to the requirement of synchronous adjustment of the overall vehicle height, simultaneously control the four active damper assemblies based on vehicle height adjustment of the vehicle to realize unified height adjustment of the four wheels of the vehicle.
[0072] Step S23: According to the requirement of leveling or anti-roll, control the corresponding active damper assembly based on vehicle height adjustment to realize automatic leveling or dynamic posture control of the vehicle.
[0073] According to the requirement information input by the user, if it is the requirement of synchronous adjustment of the overall vehicle height, the four active damper assemblies of the vehicle are uniformly controlled to realize synchronous lifting of the overall vehicle height, so as to meet the basic passability and aerodynamic requirement, if it is the requirement of leveling or anti-roll, the independent control is performed on part of the active damper assemblies to realize the automatic leveling function of the vehicle, so as to keep the vehicle posture when the load is uneven, or realize the dynamic posture control of the vehicle to suppress the roll when the vehicle turns.
[0074] As shown in Figures 1 to 5 According to the vehicle of the fourth aspect embodiment of the present application, the active damper assembly based on vehicle height adjustment of the first aspect embodiment or the control system of the second aspect embodiment is included.
[0075] Specifically, the vehicle can be a private car, such as a sedan, an SUV, an MPV or a pickup truck, etc. The vehicle can also be an operating vehicle, such as a van, a bus, a small truck or a large trailer, etc. The vehicle can be a new energy vehicle, such as an oil-electric hybrid vehicle, or a pure electric vehicle.
[0076] It can be understood that the suspension system of the vehicle can be configured with four active damper assemblies based on vehicle height adjustment to realize the regulation and control function of the vehicle height. Further, the vehicle can also be equipped with a vehicle speed sensor, a driving mode selector and an acceleration sensor or a vibration sensor to be used with the active damper assembly based on vehicle height adjustment.
[0077] The vehicle can automatically or manually adjust the overall vehicle height or the single wheel height according to the vehicle speed, the road conditions and the driver's intention and other information by using the active damper assembly or the control system with the above structure, so as to optimize the performance of the vehicle and meet the driving requirements of the driver.
[0078] In the description of the specification, reference to "one embodiment", "some embodiments", "an exemplary embodiment", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "in some embodiments", "in an exemplary embodiment", "an example", "a specific example", or "some examples" in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.
[0079] Although embodiments of the application have been shown and described, it will be appreciated that those skilled in the art can make various changes, modifications, substitutions and alterations thereto without departing from the principles and scope of the application, which are defined by the claims and their equivalents.
Claims
1. A vehicle height adjustment based active damper assembly, characterized in that, The shock absorber is fixedly provided with a rack extending in the up-down direction at the lower end thereof; The housing is provided with a cavity with an opening facing upward, the lower end of the shock absorber extends into the cavity and is in sliding connection with the inner circumferential surface of the cavity in the up-down direction, the lower end of the housing is fixedly provided with a connecting fork, the connecting fork is provided with a mounting hole extending in the first direction; The driving device is inclined from top to bottom to the housing, the driving device comprises a motor, a speed reducer and a gear, the speed reducer is fixedly connected with the housing, the input shaft of the speed reducer is fixedly connected with the output shaft of the motor, the output shaft of the speed reducer is coaxially fixedly provided with the gear, the gear is in meshing connection with the rack, the central axis of the gear extends at an acute angle with the extending direction of the rack and at an acute angle with the extending direction of the mounting hole, the motor is configured to drive the gear to rotate, so that the rack drives the shock absorber to move in the up-down direction, to realize height adjustment of the shock absorber, and the first direction is perpendicular to the up-down direction. The control device is further provided with a buffer pad connected with the inner bottom surface of the cavity, the buffer pad is configured to buffer the rack.
2. The vehicle height adjustment based active damper assembly of claim 1, wherein, The control device is further provided with a corrugated telescopic sleeve configured to extend and contract in the up-down direction, the lower end of the corrugated telescopic sleeve is sleeved on the housing and is fixedly connected with the upper end of the housing, and the upper end of the corrugated telescopic sleeve is sleeved on the shock absorber and is fixedly connected with the outer circumferential surface of the shock absorber.
3. The vehicle height adjustment based active damper assembly of claim 1, wherein, The lower end of the rack is fixedly provided with a guide ring, the outer circumferential surface of the guide ring is in contact with and in sliding connection with the inner circumferential surface of the cavity in the up-down direction, and the shock absorber and the cavity are coaxially arranged; and / or 4. The vehicle height adjustment-based active damper assembly of claim 1, wherein, The lower end of the shock absorber is fixedly provided with a limiting ring, the limiting ring is arranged in the cavity, and the limiting ring is configured to be clamped with the opening of the cavity to limit the maximum height position of the shock absorber. The driving device further comprises a controller, the controller is arranged on the side of the motor away from the speed reducer and is in electrical connection with the motor, and the motor, the speed reducer and the controller are connected to form an integrated structure.
5. The active damper assembly based on vehicle height adjustment according to any one of claims 1 to 4, characterized in that The vehicle speed sensor is used to obtain vehicle speed data; 6. A control system characterized by, The driving mode selector is used to switch driving modes, the driving modes include a comfort mode, a sport mode and an off-road mode; The road condition detection component is an acceleration sensor or a vibration sensor, and the road conditions include flat road, ordinary road and bumpy road; The controller is electrically connected to the vehicle speed sensor, the driving mode selector and the road condition detection component, and is configured to control the working state of the motor according to the driving mode, the vehicle speed data and the road condition, so as to control the height position of the shock absorber and realize vehicle height control. The controller is configured to: 7. The control system of claim 6, wherein, When the driving mode is the comfort mode, and the vehicle is running at high speed on flat or ordinary road, the motor is controlled to operate and drive the shock absorber to descend by a first set distance, so as to realize the vehicle height reduction; When the driving mode is the comfort mode, and the vehicle is running at low speed on bumpy road, the motor is controlled to operate and drive the shock absorber to ascend by a second set distance, so as to realize the vehicle height increase; When the driving mode is the off-road mode, and the vehicle is running at low or medium speed on bumpy or ordinary road, the motor is controlled to operate and drive the shock absorber to ascend by a third set distance, so as to realize the vehicle height increase; When the driving mode is the sports mode, the motor is controlled to operate and drive the shock absorber to descend by a fourth set distance, so as to realize the vehicle height reduction.
8. The control system of claim 6, wherein, The control system is configured to be able to control four motors to operate and drive the corresponding shock absorbers to ascend or descend simultaneously when the vehicle is equipped with four vehicle height adjustment based active shock absorber assemblies, so as to realize the whole vehicle height synchronous adjustment, or control part of the motors to operate and drive the corresponding shock absorbers to ascend or descend, so as to realize the vehicle posture adjustment.
9. A control method, implemented on the basis of a vehicle-height-adjustment-based active damper assembly according to any one of claims 1 to 5, characterized in that The control method comprises the following steps: obtaining the driving mode, vehicle speed data and road condition; When the driving mode is the comfort mode, and the vehicle is running at high speed on flat or ordinary road, the motor is controlled to operate and drive the shock absorber to descend by a first set distance, so as to realize the vehicle height reduction; When the driving mode is the comfort mode, and the vehicle is running at low speed on bumpy road, the motor is controlled to operate and drive the shock absorber to ascend by a second set distance, so as to realize the vehicle height increase; When the driving mode is the off-road mode, and the vehicle is running at low or medium speed on bumpy or ordinary road, the motor is controlled to operate and drive the shock absorber to ascend by a third set distance, so as to realize the vehicle height increase; When the driving mode is the sports mode, the motor is controlled to operate and drive the shock absorber to descend by a fourth set distance, so as to realize the vehicle height reduction. Or, obtaining the user input requirement information; controlling four vehicle height adjustment based active shock absorber assemblies of the vehicle to operate simultaneously according to the requirement of the whole vehicle height synchronous adjustment, so as to realize the unified height adjustment of the four wheels of the vehicle; controlling the corresponding vehicle height adjustment based active shock absorber assembly to operate according to the requirement of the leveling or anti-roll, so as to realize the automatic leveling or dynamic posture control of the vehicle.
10. A vehicle characterized by comprising: The vehicle height adjustment based active shock absorber assembly according to any one of claims 1 to 5 or the control system according to any one of claims 6 to 8.