Vehicle height adjusting device and method and vehicle

Abstract

The invention provides a vehicle height adjusting device and method and a vehicle. The device comprises a hydraulic pump, a hydraulic controller, a hydraulic distributor and a shock absorber, the shock absorber comprises a vertical height adjuster; wherein the first end of the hydraulic controller is connected with the first end of the hydraulic pump; the hydraulic controller is used for sending a first control signal to the hydraulic pump to open the hydraulic pump under the condition of determining that the height of the vehicle is to be adjusted; the second end of the hydraulic pump is connected with the first end of the hydraulic distributor through a first liquid path channel; the hydraulic pump is used for injecting shock absorber liquid into the hydraulic distributor through the first liquid path channel; the second end of the hydraulic distributor is connected with a vertical height adjuster in the shock absorber through a second liquid path channel; and the hydraulic distributor is used for injecting shock absorber liquid into the vertical height adjuster through the second liquid path channel or extracting the shock absorber liquid after the shock absorber liquid is injected so as to adjust the height of the vehicle to the target height.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle control, in particular to a vehicle height adjusting device, method and vehicle. BACKGROUND

[0002] With the development of vehicle electrification and intelligence, the driving comfort, controllability and safety of the vehicle are increasingly concerned by users. For some driving scenes or working conditions (such as getting stuck), actively adjusting the height of the vehicle can effectively improve the passability of the vehicle, actively adjusting the height of the vehicle can effectively improve the controllability of the vehicle, reduce energy consumption, etc. However, in the height adjustment method of the related technology, the adjustment speed is slow. SUMMARY

[0003] The present application provides a vehicle height adjusting device, method and vehicle, which is beneficial to improve the adjustment speed of the basic height of the vehicle.

[0004] In a first aspect, the present application provides a vehicle height adjusting device, the device comprising: a hydraulic pump, a hydraulic controller, a hydraulic distributor, a shock absorber; the shock absorber comprising a vertical height adjuster; wherein the first end of the hydraulic controller is connected with the first end of the hydraulic pump; the hydraulic controller is used to send a first control signal to the hydraulic pump to open the hydraulic pump when it is determined that the height of the vehicle is to be adjusted; the second end of the hydraulic pump is connected with the first end of the hydraulic distributor through a first liquid path channel; the hydraulic pump is used to inject shock absorber liquid into the hydraulic distributor through the first liquid path channel; the second end of the hydraulic distributor is connected with the vertical height adjuster in the shock absorber through a second liquid path channel; the hydraulic distributor is used to inject or inject and then extract shock absorber liquid into the vertical height adjuster through the second liquid path channel to adjust the height of the vehicle to a target height.

[0005] It can be understood that in the vehicle height adjusting device provided by the present application, the vertical height adjuster is added in the shock absorber, so that the hydraulic controller sends a first control signal to the hydraulic pump to open the hydraulic pump when it is determined that the height of the vehicle is to be adjusted; in this way, the hydraulic pump will inject shock absorber liquid into the hydraulic distributor through the first liquid path channel; the hydraulic distributor will inject or inject and then extract shock absorber liquid into the vertical height adjuster through the second liquid path channel. In this way, the vertical height adjuster can be driven to move by the shock absorber liquid, so as to adjust the height of the vehicle. In this way, compared with adjusting the height of the vehicle by injecting or extracting air into the air spring, the adjustment speed of the basic height of the vehicle is improved.

[0006] In some embodiments, the shock absorber further includes a ball screw and a servo motor; wherein, the second end of the hydraulic controller is connected to the servo motor in the shock absorber; the hydraulic controller is used to control the servo motor to rotate while the vertical height adjuster adjusts the vehicle height, so as to drive the ball screw to follow, thereby adjusting the position of the limit block; the limit block is used to limit the position of the vertical height adjuster; the third end of the hydraulic controller is connected to the third end of the hydraulic distributor, and the hydraulic controller is also used to lock the ball screw to lock the vertical height adjuster when the vertical height adjuster adjusts the vehicle height to the target height; and send a second control signal to close the second hydraulic passage.

[0007] It is understood that in the vehicle height adjustment device provided in this application embodiment, a ball screw and a servo motor are added to the shock absorber, and the second end of the hydraulic controller is connected to the servo motor in the shock absorber. Thus, while the vertical height adjuster adjusts the vehicle height, the hydraulic controller controls the servo motor to rotate, driving the ball screw to follow suit, thereby adjusting the position of the limit block to restrict the position of the vertical height adjuster. When the hydraulic controller determines that the vehicle height has been adjusted to the target height, it locks the ball screw to lock the vertical height adjuster and sends a second control signal to close the second hydraulic passage. Therefore, when the vehicle height is adjusted to the target height, it is not necessary to continuously input shock absorber fluid to maintain the vehicle height with the vertical height adjuster, which helps reduce energy consumption when maintaining the target height.

[0008] In some embodiments, the hydraulic controller is further configured to, during the vehicle height adjustment process, lock the ball screw to lock the vertical height adjuster if a fault is detected in one or more of the hydraulic pump, the hydraulic distributor, and the shock absorber; and send a second control signal to close the second hydraulic passage.

[0009] It is understood that in the vehicle height adjustment device provided in this application embodiment, if a failure is detected in one or more of the hydraulic pump, hydraulic distributor, and shock absorber during the vehicle height adjustment process, the ball screw is locked to lock the vertical height adjuster; and a second control signal is sent to close the second hydraulic passage. This helps to avoid vehicle driving safety problems caused by failures of the hydraulic pump, hydraulic distributor, and shock absorber, thereby helping to ensure safe vehicle operation.

[0010] In some embodiments, the hydraulic controller is further configured to, during the vehicle height adjustment process, lock the ball screw to lock the vertical height adjuster if it is determined that the bump coefficient of the road surface on which the vehicle is currently traveling is greater than a coefficient threshold; and send a second control signal to close the second hydraulic passage.

[0011] It can be understood that in the vehicle height adjusting device provided by the embodiments of the present application, in the process of adjusting the height of the vehicle, if it is determined that the bumping coefficient of the current driving road of the vehicle is greater than the coefficient threshold, the ball screw is locked to lock the vertical height adjuster, and a second control signal is sent to close the second hydraulic passage. In this way, it is beneficial to avoid the vehicle rollover, mechanical failure and wave driving problem caused by height adjustment due to road bumping, so as to ensure the comfort of passengers.

[0012] In some embodiments, the hydraulic controller is further configured to, in a case where it is determined that the vertical height adjuster adjusts the height of the vehicle to a target height, control the hydraulic pump to reduce the shock absorber liquid input to the hydraulic distributor to keep the height of the vehicle at the target height, and lock the ball screw to lock the vertical height adjuster.

[0013] It can be understood that in the vehicle height adjusting device provided by the embodiments of the present application, the hydraulic controller, in a case where it is determined that the vertical height adjuster adjusts the height of the vehicle to a target height, controls the hydraulic pump to reduce the shock absorber liquid input to the hydraulic distributor, so that the height of the vehicle is kept at the target height, and then locks the ball screw to lock the vertical height adjuster and sends a second control signal to close the second hydraulic passage. In this way, the height of the vehicle can be adjusted to the target height, and the shock absorber liquid does not need to be continuously input to keep the height of the vehicle, which is beneficial to reducing the energy consumption when the vehicle is kept at the target height.

[0014] In some embodiments, the hydraulic controller is configured to, in a case where it is determined that the height of the vehicle is to be increased to the target height, send a first control signal to the hydraulic pump to open the hydraulic pump, and the hydraulic distributor is configured to inject the shock absorber liquid to the vertical height adjuster through the second hydraulic passage to adjust the height of the vehicle to the target height.

[0015] It can be understood that in the vehicle height adjusting device provided by the embodiments of the present application, the vertical height adjuster is added in the shock absorber, so that in a case where the hydraulic controller determines that the height of the vehicle is to be increased to the target height, a first control signal is sent to the hydraulic pump to open the hydraulic pump, so that the hydraulic pump injects the shock absorber liquid to the hydraulic distributor through the first hydraulic passage, and the hydraulic distributor injects the shock absorber liquid to the vertical height adjuster through the second hydraulic passage. In this way, the vertical height adjuster can be driven to move by the shock absorber liquid, so as to adjust the height of the vehicle. In this way, compared with adjusting the height of the vehicle by injecting or extracting air into the air spring, the adjusting speed of the basic height of the vehicle is improved.

[0016] In some embodiments, the hydraulic controller is configured to send a first control signal to the hydraulic pump to open the hydraulic pump in a case where it is determined that the height of the vehicle is to be lowered to the target height; the hydraulic distributor is configured to inject the shock absorber fluid to the vertical height adjuster through the second fluid passage to maintain the current height of the vehicle; and the hydraulic distributor is configured to extract the shock absorber fluid from the vertical height adjuster through the second fluid passage to adjust the current height of the vehicle to the target height of the vehicle.

[0017] It can be understood that, in the vehicle height adjustment device provided by the embodiments of the present application, the vertical height adjuster is added to the shock absorber, so that the hydraulic controller sends a first control signal to the hydraulic pump to open the hydraulic pump in a case where it is determined that the height of the vehicle is to be lowered to the target height; thus, the hydraulic pump injects the shock absorber fluid to the hydraulic distributor through the first fluid passage; and the hydraulic distributor injects the shock absorber fluid to the vertical height adjuster through the second fluid passage and then extracts the shock absorber fluid. In this way, the vertical height adjuster can be driven to move by the shock absorber fluid, so as to adjust the height of the vehicle. Thus, compared with adjusting the height of the vehicle by injecting or extracting air into or from the air spring, the adjustment speed of the basic height of the vehicle is improved.

[0018] In some embodiments, the hydraulic controller is configured to send a first control signal to the hydraulic pump to open the hydraulic pump in a case where it is determined that the height of the vehicle is to be adjusted, and in a case where it is determined that the bumping coefficient of the current driving road surface of the vehicle is less than or equal to a coefficient threshold, and in a case where it is determined that the hydraulic pump, the hydraulic distributor and the shock absorber are all normal.

[0019] It can be understood that, in the vehicle height adjustment device provided by the embodiments of the present application, the height of the vehicle is adjusted only in a case where the road surface is flat and the devices in the vehicle height adjustment device are not faulty. Thus, it is beneficial to avoid the problems of vehicle rollover, mechanical failure and wave driving of the vehicle caused by height adjustment of the vehicle due to the bumping of the road surface, and it is beneficial to avoid the problem of driving safety of the vehicle caused by the fault of the devices in the vehicle height adjustment device, thereby benefiting to ensure the safe driving of the vehicle and the comfort of the passengers.

[0020] In some embodiments, the shock absorber is a device that realizes the shock absorption function based on a coil spring; or the shock absorber is a device that realizes the shock absorption function based on an air spring.

[0021] It can be understood that, in the vehicle height adjusting device provided by the embodiments of the present application, the vertical height adjuster is driven by the shock absorber liquid, and the servo motor is controlled to rotate by the hydraulic controller, so that the ball screw is driven to follow, so that the vertical height adjuster is locked by locking the ball screw when the height of the vehicle is adjusted to the target height by the vertical height adjuster. In this way, the height of the vehicle does not need to be adjusted by injecting or extracting air into the air spring; therefore, the adjustment speed of the base height of the vehicle can be improved for the shock absorber based on the coil spring to realize the shock absorbing function, and for the shock absorber based on the air spring to realize the shock absorbing function.

[0022] In a second aspect, the embodiments of the present application provide a vehicle height adjusting method, which is applied to the vehicle height adjusting device as described in the first aspect, and the method comprises: in a case where it is determined that the height of the vehicle is to be adjusted, sending a first control signal to the hydraulic pump to open the hydraulic pump; injecting the shock absorber liquid into the hydraulic distributor through the first liquid passage; and injecting or injecting and then extracting the shock absorber liquid into the vertical height adjuster in the shock absorber through the second liquid passage, so as to adjust the height of the vehicle to the target height.

[0023] It can be understood that, in the vehicle height adjusting method provided by the embodiments of the present application, the vertical height adjuster is added in the shock absorber, so that the first control signal is sent to the hydraulic pump to open the hydraulic pump in a case where it is determined by the hydraulic controller that the height of the vehicle is to be adjusted; in this way, the hydraulic pump will inject the shock absorber liquid into the hydraulic distributor through the first liquid passage; the hydraulic distributor will inject or inject and then extract the shock absorber liquid into the vertical height adjuster through the second liquid passage. In this way, the vertical height adjuster can be driven to move by the shock absorber liquid, so as to adjust the height of the vehicle. In this way, compared with adjusting the height of the vehicle by injecting or extracting air into the air spring, the adjustment speed of the base height of the vehicle is improved.

[0024] In a third aspect, the embodiments of the present application provide a vehicle, which comprises the vehicle height adjusting device as described in the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments consistent with the present application and, together with the specification, serve to explain the technical solutions of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0026] The flow chart shown in the drawings is only an exemplary illustration, and is not necessarily to include all the contents and operations / steps, nor is it necessarily to be executed in the order as described. For example, some operations / steps can be further decomposed, and some operations / steps can be combined or partially combined, so the actual execution order can be changed according to the actual situation.

[0027] Figure 1 Structure diagram of a vehicle height adjusting device provided by an embodiment of the present application Figure One ;

[0028] Figure 2 Structure diagram of a vehicle height adjusting device provided by an embodiment of the present application Figure Two ;

[0029] Figure 3 Structure diagram of a vehicle height adjusting device provided by an embodiment of the present application Figure Three ;

[0030] Figure 4 Structure diagram of a vehicle height adjusting device provided by an embodiment of the present application Figure Four ;

[0031] Figure 5 Structure diagram of a vehicle height adjusting device provided by an embodiment of the present application Figure Five ;

[0032] Figure 6 Implementation flow diagram of a vehicle height adjusting method provided by an embodiment of the present application Figure One ;

[0033] Figure 7 Implementation flow diagram of a vehicle height adjusting method provided by an embodiment of the present application Figure Two ;

[0034] Figure 8 Structure diagram of a vehicle provided by an embodiment of the present application. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0036] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described below with reference to the drawings, and the described embodiments below are only some of the embodiments of the present application, but not all the embodiments, so the described embodiments should not be regarded as limitations to the present application, and all the other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present application.

[0037] In the following description, "some embodiments / some other embodiments" are described, which describe a subset of all possible embodiments, but it can be understood that "some embodiments / some other embodiments" can be the same subset of all possible embodiments or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0038] In the following description, the terms "first / second" are only distinguished from similar objects, and do not represent a specific order of the objects. It can be understood that "first / second" can be interchanged in a specific order or sequence as allowed, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0040] In a related art, a vehicle height adjustment device is provided to improve the speed of vehicle height adjustment, reduce weight, and reduce cost. A threaded mechanism including a ball screw and a nut member engaged with the ball screw via a ball is provided between the hollow rod of the hydraulic shock absorber and the vehicle body mounting member. A DC motor is connected to the screw. In another related art, the speed of vehicle height adjustment is improved, the weight is reduced, and the cost is reduced by providing a screw propulsion mechanism between the piston rod and the vehicle body mounting member or the axle mounting member or between the cylinder and the vehicle body mounting member.

[0041] However, the related art has limited improvement in the speed of vehicle height adjustment, and the device structure is complex.

[0042] Therefore, in the embodiments of the present application, a vehicle height adjustment device is provided, Figure 1 A vehicle height adjustment device provided in the embodiments of the present application Figure One As shown in Figure 1 The vehicle height adjustment device 10 includes a hydraulic pump 101, a hydraulic controller 102, a hydraulic distributor 103, and a shock absorber 104. The shock absorber includes a vertical height adjustment device 1041. Wherein,

[0043] The first end of the hydraulic controller 102 is connected to the first end of the hydraulic pump 101. The hydraulic controller 102 is configured to send a first control signal to the hydraulic pump 101 to open the hydraulic pump 101 when it is determined that the height of the vehicle is to be adjusted.

[0044] The second end of the hydraulic pump 101 is connected to the first end of the hydraulic distributor 103 through a first liquid channel. The hydraulic pump 101 is configured to inject shock absorber liquid into the hydraulic distributor 103 through the first liquid channel.

[0045] The second end of the hydraulic distributor 103 is connected with the vertical height adjuster 1041 in the shock absorber 104 through a second hydraulic passage; the hydraulic distributor 103 is used for injecting or injecting and then extracting the shock absorber liquid through the second hydraulic passage to the vertical height adjuster 1041, so as to adjust the height of the vehicle to the target height.

[0046] It can be understood that in the vehicle height adjustment device provided by the embodiment of the present application, the vertical height adjuster 1041 is added in the shock absorber 104, so that when the hydraulic controller 102 determines that the height of the vehicle needs to be adjusted, the first control signal is sent to the hydraulic pump 101 to open the hydraulic pump 101; in this way, the hydraulic pump 101 will inject the shock absorber liquid into the hydraulic distributor 103 through the first hydraulic passage; the hydraulic distributor 103 will inject or inject and then extract the shock absorber liquid to the vertical height adjuster 1041 through the second hydraulic passage. In this way, the vertical height adjuster 1041 can be driven to move by the shock absorber liquid, so as to adjust the height of the vehicle. In this way, compared with adjusting the height of the vehicle by injecting or extracting air into the air spring, the adjustment speed of the basic height of the vehicle is improved.

[0047] In some embodiments, the adjusting the height of the vehicle refers to adjusting the basic height of the vehicle.

[0048] It should be understood that in the embodiment of the present application, the basic height adjustment is not limited, and the basic height adjustment refers to the initial setting and dynamic adjustment of the vehicle body ground clearance according to the driving conditions (such as road conditions, load state, driving mode, etc.) in the vehicle vertical height adjustment, and the core purpose is to balance the handling stability, passability and comfort of the vehicle.

[0049] In some embodiments, the hydraulic controller 102 is used for determining that the height of the vehicle needs to be adjusted in the case of receiving the request instruction sent by the vehicle system; the request instruction is used for requesting to adjust the height of the vehicle; and the request instruction comprises a target height.

[0050] In another embodiment, the hydraulic controller 102 is used for determining that the height of the vehicle needs to be adjusted in the case of receiving the request instruction sent by other controllers or systems. The request instruction is sent by the other controllers or systems in the case of detecting that the vehicle is in the to-be-unstuck working condition.

[0051] It should be understood that in the embodiments of the present application, the target height is not limited and should be within the height adjustment range of the vehicle. It should be understood that in the embodiments of the present application, the height adjustment range of the vehicle is not limited. In some embodiments, the height adjustment range of the vehicle is determined based on the vehicle model, the type of the suspension, and the components of the vehicle, etc. In some embodiments, the target height is 50 mm.

[0052] In some embodiments, Figure 2 A structure diagram of a vehicle height adjustment device provided by the embodiments of the present application Figure Two As shown in Figure 2 The shock absorber 104 further comprises a ball screw 1042 and a servo motor 1043; wherein,

[0053] The second end of the hydraulic controller 102 is connected with the servo motor 1043 in the shock absorber 104;

[0054] The hydraulic controller 102 is used to control the servo motor 1043 to rotate to drive the ball screw 1042 to follow, so as to adjust the position of the limit block, while the vertical height adjuster 1041 adjusts the height of the vehicle; the limit block is used to limit the position of the vertical height adjuster 1041;

[0055] The third end of the hydraulic controller 102 is connected with the third end of the hydraulic distributor 103, and the hydraulic controller 102 is further used to lock the ball screw 1042 to lock the vertical height adjuster 1041, and send a second control signal to close the second hydraulic passage, when the vertical height adjuster 1041 adjusts the height of the vehicle to the target height.

[0056] It can be understood that in the vehicle height adjustment device provided by the embodiments of the present application, the ball screw 1042 and the servo motor 1043 are added in the shock absorber 104, and the second end of the hydraulic controller 102 is connected with the servo motor 1043 in the shock absorber 104; in this way, while the vertical height adjuster 1041 adjusts the height of the vehicle, the hydraulic controller 102 controls the servo motor 1043 to rotate to drive the ball screw 1042 to follow, so as to adjust the position of the limit block to limit the position of the vertical height adjuster 1041; the hydraulic controller locks the ball screw 1042 to lock the vertical height adjuster 1041, and sends a second control signal to close the second hydraulic passage, when the height of the vehicle is adjusted to the target height. Thus, in the case that the height of the vehicle is adjusted to the target height, it is not necessary to continuously input the shock absorber liquid to maintain the height of the vehicle by the vertical height adjuster 1041, which is beneficial to reduce the energy consumption when the vehicle maintains the target height.

[0057] In some embodiments, the hydraulic controller 102 is configured to acquire a rotation angle of the servo motor 1043, and determine a current height of the vehicle according to a first mapping relationship and the rotation angle of the servo motor 1043, wherein the first mapping relationship is configured to represent a corresponding relationship between the rotation angle of the servo motor 1043 and the height of the vehicle.

[0058] In some other embodiments, the hydraulic controller 102 is configured to acquire a rotation angle of the servo motor 1043, and determine a current height of the vehicle according to the rotation angle of the servo motor 1043 and a lever ratio of the ball screw 1042.

[0059] It should be understood that, in the embodiments of the present application, the rotation angle of the servo motor 1043 is not limited. In some embodiments, the servo motor 1043 rotates one round, and the rotation angle of the servo motor 1043 is 360 degrees. In some other embodiments, the servo motor 1043 rotates two rounds, and the rotation angle of the servo motor 1043 is 720 degrees.

[0060] In the embodiments of the present application, the lever ratio of the ball screw 1042 is not limited, and the lever ratio of the ball screw 1042 is configured to represent a conversion relationship between the rotation angle of the servo motor 1043 and an output (such as a linear displacement of a screw nut or a load force). In some embodiments, the lever ratio of the ball screw 1042 is a core parameter for connecting rotation and linear motion, and its essence is a function of lead and transmission ratio, which determines the conversion relationship of displacement, torque and force.

[0061] It should be understood that, in the embodiments of the present application, the locking is not limited, and the locking refers to limiting the movement of a component (for example, the ball screw 1042 and / or the vertical height adjuster 1041) through a physical structure or friction force, so as to ensure the stability and safety of the component.

[0062] In some embodiments, the hydraulic controller 102 is further configured to, in the process of adjusting the height of the vehicle, in a case where one or more of the hydraulic pump 101, the hydraulic distributor 103 and the shock absorber 104 fails, lock the ball screw 1042 to lock the vertical height adjuster 1041, and send a second control signal to close the second hydraulic passage.

[0063] It can be understood that, in the vehicle height adjustment device provided in the embodiments of the present application, in the process of adjusting the height of the vehicle, in a case where one or more of the hydraulic pump 101, the hydraulic distributor 103 and the shock absorber 104 fails, the ball screw 1042 is locked to lock the vertical height adjuster 1041, and a second control signal is sent to close the second hydraulic passage. In this way, it is beneficial to avoid the problem of vehicle driving safety caused by the failure of the hydraulic pump 101, the hydraulic distributor 103 and the shock absorber 104, so as to be beneficial to ensure the safe driving of the vehicle.

[0064] Exemplarily, in a possible implementation, the hydraulic controller determines whether the associated system signals and actuator signals are faulty, and if the signals are faulty, the hydraulic controller prohibits entering the height adjustment. If the fault occurs when the height adjustment is in progress, the hydraulic controller drives the hydraulic distributor to connect the hydraulic pump to the hydraulic circuit back to the shock absorber circuit. At this time, the vertical height adjuster no longer has the height adjustment function. At the same time, the vertical height adjuster and the ball screw are locked, and the current base height is kept unchanged. The associated system signals and actuator signals refer to signals generated by the hydraulic pump, the hydraulic distributor, the vertical height adjuster, the ball screw, and the servo motor, or refer to monitoring signals for monitoring the states or functions of the hydraulic pump, the hydraulic distributor, the vertical height adjuster, the ball screw, and the servo motor.

[0065] In some embodiments, the hydraulic controller 102 is further configured to, in the process of adjusting the height of the vehicle, lock the ball screw 1042 to lock the vertical height adjuster 1041 when it is determined that the bump coefficient of the current driving road surface of the vehicle is greater than the coefficient threshold, and send a second control signal to close the second hydraulic circuit passage.

[0066] It can be understood that, in the vehicle height adjustment device provided in the embodiments of the present application, in the process of adjusting the height of the vehicle, the ball screw 1042 is locked to lock the vertical height adjuster 1041 when it is determined that the bump coefficient of the current driving road surface of the vehicle is greater than the coefficient threshold, and a second control signal is sent to close the second hydraulic circuit passage. In this way, it is beneficial to avoid the problems of vehicle rollover, mechanical failure, and vehicle wave driving caused by height adjustment due to road bumps, thereby ensuring the comfort of passengers.

[0067] Exemplarily, in a possible implementation, the hydraulic controller estimates the road bump coefficient according to the shock absorber speed and the vertical speed on the spring. If the road bump coefficient is too large or the shock absorber enters the dynamic adjustment, it is considered that the road or the working condition of the vehicle is not suitable for base height adjustment at this time, and the height adjustment mode is prohibited. If it is found that the road is too bumpy or the vehicle needs the shock absorber to enter the dynamic adjustment working condition during the adjustment process, the hydraulic controller drives the hydraulic pump to connect the hydraulic circuit back to the shock absorber circuit. At this time, the vertical height adjuster no longer has the height adjustment function. At the same time, the vertical height adjuster and the ball screw are locked, and the current base height is kept unchanged.

[0068] In some embodiments, the hydraulic controller 102 is further configured to, in a case where the vertical height adjuster 1041 adjusts the height of the vehicle to a target height, control the hydraulic pump 101 to reduce the shock absorber liquid input to the hydraulic distributor 103, so that the height of the vehicle is kept at the target height, and lock the ball screw 1042 to lock the vertical height adjuster 1041.

[0069] It can be understood that in the vehicle height adjusting device provided by the embodiment of the present application, when the vertical height adjuster 1041 is determined to adjust the height of the vehicle to the target height, the hydraulic controller 102 controls the hydraulic pump 101 to reduce the shock absorber liquid input to the hydraulic distributor 103; in this way, the height of the vehicle is kept at the target height; then the ball screw 1042 is locked to lock the vertical height adjuster 1041, and a second control signal is sent to close the second liquid passage. In this way, on the premise of ensuring that the height of the vehicle is adjusted to the target height, the shock absorber liquid does not need to be continuously input to maintain the height of the vehicle by the vertical height adjuster 1041, which is beneficial to reducing the energy consumption when the vehicle maintains the target height.

[0070] In some embodiments, Figure 3 The structure of a vehicle height adjusting device provided by the embodiment of the present application Figure Three As Figure 3 As shown, the third end of the hydraulic controller 102 is connected with the third end of the hydraulic distributor 103, and the hydraulic controller 102 is further used to close the hydraulic distributor 103 after locking the vertical height adjuster 1041.

[0071] Exemplarily, in a possible implementation, when the difference between the actual height and the target height is within the allowable error range, the hydraulic pump uses the minimum hydraulic pump rotating speed to maintain the height of the current vertical height adjuster.

[0072] Since the “ball screw-servo motor” in the ball screw structure does not have a height adjusting function, when the hydraulic pump only performs the height maintaining action, the servo motor in the ball screw structure is in the locked-rotor state in the stretching action; and at this time, the error between the actual height and the target height is within the allowable range; at this time, the hydraulic controller drives the “ball screw-servo motor” in the ball screw structure to lock the vertical height adjuster, and stops the height adjustment.

[0073] When the height adjustment is stopped, the hydraulic controller closes the liquid passage input switch (which is an example of the second liquid passage) to the vertical height adjuster, and closes the hydraulic distributor switch.

[0074] In some embodiments, the adjusting the height of the vehicle includes: increasing the height of the vehicle or decreasing the height of the vehicle.

[0075] In some embodiments, the hydraulic controller 102 is used to send a first control signal to the hydraulic pump 101 to open the hydraulic pump 101 when it is determined that the height of the vehicle is to be increased to the target height; and the hydraulic distributor 103 is used to inject the shock absorber liquid to the vertical height adjuster 1041 through the second liquid passage to adjust the height of the vehicle to the target height.

[0076] It can be understood that in the vehicle height adjusting device provided by the embodiments of the present application, the vertical height adjuster 1041 is added in the shock absorber 104, so that when the hydraulic controller 102 determines that the height of the vehicle is to be increased to the target height, the first control signal is sent to the hydraulic pump 101 to open the hydraulic pump 101; in this way, the hydraulic pump 101 will inject the shock absorber liquid to the hydraulic distributor 103 through the first liquid passage, and the hydraulic distributor 103 will inject the shock absorber liquid to the vertical height adjuster 1041 through the second liquid passage. In this way, the vertical height adjuster 1041 can be driven to move by the shock absorber liquid, so as to adjust the height of the vehicle. In this way, compared with the height adjustment of the vehicle by injecting or extracting air into the air spring, the adjustment speed of the basic height of the vehicle is improved.

[0077] Further, in some embodiments, the hydraulic controller 102 is further configured to, when determining that the vertical height adjuster 1041 is to increase the height of the vehicle to the target height, control the hydraulic pump 101 to reduce the shock absorber liquid input to the hydraulic distributor 103, so as to keep the height of the vehicle at the target height; and lock the ball screw 1042 to lock the vertical height adjuster 1041.

[0078] Exemplarily, in a possible implementation, the basic height of the vehicle can be increased by the following steps 11 to 14:

[0079] Step 11, first, the hydraulic controller drives the hydraulic distributor to open the input switch to the vertical height adjuster, and sends the first control signal to the hydraulic pump 101 to open the hydraulic pump connected to the hydraulic distributor switch, so as to open the liquid passage between the hydraulic pump and the hydraulic distributor. At the same time, the hydraulic pump provides the basic forward rotation speed to inject the shock absorber liquid to the vertical height adjuster, so as to increase the height of the vertical height adjuster;

[0080] Step 12, the ball screw structure is unlocked, and the height adjustment limit is cancelled. During the height adjustment, the ball screw-servo motor synchronously performs the stretching action to stretch the limit block. When the actual height and the target height are within the allowable error range, the hydraulic pump uses the minimum hydraulic pump rotation speed to keep the height of the vertical height adjuster;

[0081] Step 13, since the ball screw-servo motor in the ball screw structure does not have the height adjustment function, when the hydraulic pump only performs the height maintenance action, the servo motor in the stretching action of the ball screw structure is in the locked-rotor state, and at this time, the actual height and the target height are within the allowable range, so the hydraulic controller drives the ball screw-servo motor in the ball screw structure to lock the vertical height adjuster, and stops the height adjustment;

[0082] Step 14, when the height adjustment stops, the hydraulic controller drives the hydraulic distributor to close the input switch of the liquid path to the vertical height adjuster, and closes the hydraulic distributor switch.

[0083] In some embodiments, the hydraulic controller 102 is configured to send a first control signal to the hydraulic pump 101 to open the hydraulic pump 101 when it is determined that the height of the vehicle is to be lowered to the target height; the hydraulic distributor 103 is configured to inject the shock absorber liquid into the vertical height adjuster 1041 through the second liquid path channel to maintain the current height of the vehicle; and the hydraulic distributor 103 is configured to extract the shock absorber liquid from the vertical height adjuster 1041 through the second liquid path channel to adjust the current height of the vehicle to the target height of the vehicle.

[0084] It can be understood that in the vehicle height adjustment device provided by the embodiments of the present application, the vertical height adjuster 1041 is added in the shock absorber 104, so that when the hydraulic controller 102 determines that the height of the vehicle is to be lowered to the target height, the hydraulic controller 102 sends a first control signal to the hydraulic pump 101 to open the hydraulic pump 101; in this way, the hydraulic pump 101 injects the shock absorber liquid into the hydraulic distributor 103 through the first liquid path channel; and the hydraulic distributor 103 injects the shock absorber liquid into the vertical height adjuster 1041 through the second liquid path channel and then extracts the shock absorber liquid. In this way, the vertical height adjuster 1041 can be driven to move by the shock absorber liquid, so as to adjust the height of the vehicle. In this way, compared with adjusting the height of the vehicle by injecting or extracting air into the air spring, the adjustment speed of the base height of the vehicle is improved.

[0085] In some embodiments, the hydraulic controller 102 is further configured to control the hydraulic pump 101 to lower the shock absorber liquid input to the hydraulic distributor 103 to keep the height of the vehicle at the target height when it is determined that the vertical height adjuster 1041 lowers the height of the vehicle to the target height; and lock the ball screw 1042 to lock the vertical height adjuster 1041.

[0086] Exemplarily, in a possible implementation, the base height of the vehicle can be improved by the following steps 21 to 24:

[0087] Step 21, first, the hydraulic controller drives the hydraulic distributor to open the input switch to the vertical height adjuster, and sends a first control signal to the hydraulic pump 101 to open the hydraulic pump connected to the hydraulic distributor switch, so as to open the liquid path between the hydraulic pump and the hydraulic distributor. At the same time, the hydraulic pump provides a basic forward rotation speed to inject the shock absorber liquid into the vertical height adjuster to maintain the height of the vertical height adjuster;

[0088] Step 22, the ball screw structure is unlocked, and the height adjustment restriction is cancelled. The ball screw structure height compression is reduced to the minimum. After the ball screw adjustment action is completed, the hydraulic controller dynamically adjusts the hydraulic pump to inject or extract the shock absorber liquid from the vertical height adjuster according to the current height and the target height, and maintains the target height. When the actual height and the target height difference is within the allowable error range, the hydraulic pump uses the minimum hydraulic pump speed to maintain the current vertical height adjuster height;

[0089] Step 23, since the ball screw structure does not have a height adjustment function, when the hydraulic pump is only doing height maintenance action, the ball screw structure is driven to stretch, and when the ball screw structure stretches to the target position, the servo motor in the ball screw structure is in the locked-rotor state, and at this time the actual height and the target height error is within the allowable range, at this time the hydraulic controller drives the ball screw structure to lock the vertical height adjuster "ball screw-servo motor" to stop height adjustment;

[0090] Step 24, when the height adjustment is stopped, the hydraulic controller drives the hydraulic distributor to close the liquid path input switch to the vertical height adjuster, and closes the hydraulic distributor switch.

[0091] In some embodiments, the hydraulic controller 102 is configured to, in a case where it is determined that the height of the vehicle is to be adjusted, and in a case where it is determined that the jounce coefficient of the current driving surface of the vehicle is less than or equal to the coefficient threshold, and in a case where it is determined that the hydraulic pump 101, the hydraulic distributor 103, and the shock absorber 104 are all normal, send a first control signal to the hydraulic pump 101 to open the hydraulic pump 101.

[0092] It can be understood that in the vehicle height adjustment device provided in the embodiments of the present application, the height of the vehicle is adjusted only when the road surface is flat and the devices in the vehicle height adjustment device are not faulty. In this way, it is beneficial to avoid the problems of vehicle rollover, mechanical failure, and vehicle wave driving caused by height adjustment due to road bumps, and it is beneficial to avoid the problem of vehicle driving safety caused by device failure in the vehicle height adjustment device, thereby benefiting to ensure the safe driving of the vehicle and the comfort of the passengers.

[0093] It should be understood that in the embodiments of the present application, the specific implementation of the hydraulic controller 102 to determine the jounce coefficient of the vehicle is not limited. In some embodiments, the hydraulic controller 102 is configured to determine the jounce coefficient of the current driving surface of the vehicle according to the shock absorber data and the spring sensor data.

[0094] In some embodiments, the hydraulic controller 102 is further configured to send the first control signal to the hydraulic pump 101 to turn on the hydraulic pump 101 in a case where it is determined that the height of the vehicle is to be adjusted, and in a case where it is determined that the hydraulic pump 101, the hydraulic distributor 103 and the shock absorber 104 are not in the dynamic adjustment working condition.

[0095] It should be understood that, in the embodiments of the present application, the case where the hydraulic pump 101, the hydraulic distributor 103 and the shock absorber 104 are in the dynamic adjustment working condition indicates that the coefficient of the current driving road surface of the vehicle is greater than the coefficient threshold; that is, the current driving road surface of the vehicle is relatively bumpy, which may cause the passengers to feel the shaking; that is, the hydraulic pump 101, the hydraulic distributor 103 and the shock absorber 104 are in the shock absorption function, which is used to attenuate the vibration of the vehicle body, so as to reduce the shaking felt by the passengers.

[0096] In some embodiments, the hydraulic controller is further configured to prohibit the height adjustment in a case where it is determined that the height of the vehicle is to be adjusted, and in a case where it is determined that the hydraulic pump 101, the hydraulic distributor 103 and the shock absorber 104 are in the dynamic adjustment working condition.

[0097] It can be understood that, in the embodiments of the present application, since the shock absorption effect directly affects the passengers' perception of the "smoothness" of the vehicle. Even if the height of the vehicle is adjustable, if the shock absorption is insufficient, the height change may exacerbate the feeling of bumping. Therefore, the priority of the shock absorption mode is higher than the priority of the height adjustment, which is beneficial to improve the comfort of the passengers when riding the vehicle.

[0098] In some embodiments, the shock absorber 104 is a device for realizing the shock absorption function based on a spiral spring; or, the shock absorber 104 is a device for realizing the shock absorption function based on an air spring.

[0099] It can be understood that, in the vehicle height adjustment device provided by the embodiments of the present application, the vertical height adjuster 1041 is driven by the shock absorber, and the ball screw 1042 is driven to follow by the servo motor 1043 driven by the hydraulic controller 102, so as to lock the ball screw 1042 and lock the vertical height adjuster 1041 in a case where the height of the vehicle is adjusted to the target height by the vertical height adjuster 1041. In this way, the height adjustment of the vehicle does not need to be realized by injecting or extracting air into the air spring; therefore, the adjustment speed of the base height of the vehicle can be improved for the shock absorber 104 based on the spiral spring to realize the shock absorption function, and for the shock absorber 104 based on the air spring to realize the shock absorption function.

[0100] In some embodiments, Figure 4 The structure of a vehicle height adjustment device provided by the embodiments of the present application Figure Four As shown in Figure 4 The vehicle height adjustment device provided by the embodiments of the present application can be applied to a vehicle equipped with a spiral spring.Figure 5 A structural diagram of a vehicle height adjustment device provided by an embodiment of the present application Figure Five As shown in Figure 5 The vehicle height adjustment device provided by the embodiment of the present application can be applied to a vehicle equipped with an air spring.

[0101] The embodiment of the present application provides a vehicle height adjustment method, which is applied to the vehicle height adjustment device provided by the embodiment of the present application, Figure 6 An implementation flowchart of a vehicle height adjustment method provided by an embodiment of the present application Figure One As shown in Figure 6 The method includes the following steps 601 to 603:

[0102] Step 601: sending, by a hydraulic controller, a first control signal to a hydraulic pump to open the hydraulic pump in a case where it is determined that the height of the vehicle is to be adjusted;

[0103] Step 602: injecting, by the hydraulic pump, shock absorber fluid into a hydraulic distributor based on a first fluid passage;

[0104] Step 603: injecting or injecting and then extracting, by the hydraulic distributor, the shock absorber fluid into or from a vertical height adjuster in a shock absorber based on a second fluid passage, so as to adjust the height of the vehicle to a target height.

[0105] It can be understood that in the vehicle height adjustment method provided by the embodiment of the present application, the vertical height adjuster is added in the shock absorber, so that the hydraulic controller sends the first control signal to the hydraulic pump to open the hydraulic pump in the case where it is determined that the height of the vehicle is to be adjusted; in this way, the hydraulic pump will inject the shock absorber fluid into the hydraulic distributor through the first fluid passage; the hydraulic distributor will inject or inject and then extract the shock absorber fluid into or from the vertical height adjuster through the second fluid passage. In this way, the vertical height adjuster can be driven to move by the shock absorber fluid, so as to adjust the height of the vehicle. In this way, compared with adjusting the height of the vehicle by injecting or extracting air into the air spring, the adjustment speed of the basic height of the vehicle is improved.

[0106] In some embodiments, the method further includes: controlling, by the hydraulic controller, a servo motor in the shock absorber to rotate to drive a ball screw servo in the shock absorber to adjust the position of a limiting block while the vertical height adjuster adjusts the height of the vehicle; the limiting block is used to limit the position of the vertical height adjuster; locking, by the hydraulic controller, the ball screw to lock the vertical height adjuster in a case where the vertical height adjuster adjusts the height of the vehicle to the target height; and sending a second control signal to close the second fluid passage.

[0107] In some embodiments, the method further comprises: sending, by the hydraulic controller, the first control signal to the hydraulic pump to open the hydraulic pump in a case where it is determined that the height of the vehicle is to be adjusted, and in a case where it is determined that the bumpiness coefficient of the current driving surface of the vehicle is less than or equal to a coefficient threshold, and in a case where it is determined that the hydraulic pump, the hydraulic distributor, and the shock absorber are all normal.

[0108] In some embodiments, the method further comprises: sending, by the hydraulic controller, the first control signal to the hydraulic pump to open the hydraulic pump in a case where it is determined that the height of the vehicle is to be adjusted, and in a case where it is determined that the bumpiness coefficient of the current driving surface of the vehicle is less than or equal to a coefficient threshold, and in a case where it is determined that the hydraulic pump, the hydraulic distributor, and the shock absorber are all normal.

[0109] In some embodiments, the method further comprises: sending, by the hydraulic controller, the first control signal to the hydraulic pump to open the hydraulic pump in a case where it is determined that the height of the vehicle is to be adjusted, and in a case where it is determined that the bumpiness coefficient of the current driving surface of the vehicle is less than or equal to a coefficient threshold, and in a case where it is determined that the hydraulic pump, the hydraulic distributor, and the shock absorber are all normal.

[0110] In some embodiments, the method further comprises: locking, by the hydraulic controller, the ball screw to lock the vertical height adjuster, and sending a second control signal to close the second fluid passage in a case where it is determined that one or more of the hydraulic pump, the hydraulic distributor, and the shock absorber fail during the height adjustment of the vehicle.

[0111] In some embodiments, the method further comprises: locking, by the hydraulic controller, the ball screw to lock the vertical height adjuster, and sending a second control signal to close the second fluid passage in a case where it is determined that the bumpiness coefficient of the current driving surface of the vehicle is greater than a coefficient threshold during the height adjustment of the vehicle.

[0112] In some embodiments, the method further comprises: controlling, by the hydraulic controller, the hydraulic pump to reduce the shock absorber fluid input to the hydraulic distributor to maintain the height of the vehicle at the target height in a case where it is determined that the vertical height adjuster adjusts the height of the vehicle to the target height; and locking the ball screw to lock the vertical height adjuster.

[0113] In some embodiments, the shock absorber is a device that realizes the shock absorption function based on a coil spring; or the shock absorber is a device that realizes the shock absorption function based on an air spring.

[0114] An exemplary application of the embodiment of the present application in an actual application scenario will be described below.

[0115] In active 3-way control of a vehicle (longitudinal, lateral, and vertical), active vertical control is less common. With the increasing degree of intelligence of vehicles, more and more systems have requirements for the vertical adjustment of the vehicle.

[0116] In related active vertical control technology of a vehicle, for adjustment of the basic vertical height, an air spring is used to realize, and a coil spring does not have the function of active vertical height adjustment. The embodiment of the present application provides a device for realizing rapid vehicle height adjustment and height maintenance through a hydraulic pump in cooperation with a ball screw. The device can realize rapid adjustment of the basic height of a vehicle that is equipped with a coil spring or an air spring, and when the basic height of the vehicle is adjusted to a target height, the adjusting action of the hydraulic pump can be exited, the basic height is kept unchanged through the ball screw, and energy consumption caused by the hydraulic pump is reduced. The device provided by the embodiment of the present application is suitable for height adjustment of a vehicle chassis.

[0117] In some embodiments, Figure 4 A structure diagram of a vehicle height adjustment device provided by the embodiment of the present application Figure Four As shown in FIG. 1, the vehicle height adjustment device provided by the embodiment of the present application can be applied to a vehicle equipped with a coil spring. Figure 4 As shown in FIG. 2, the vehicle height adjustment device provided by the embodiment of the present application can be applied to a vehicle equipped with an air spring. Figure 5 A structure diagram of a vehicle height adjustment device provided by the embodiment of the present application Figure Five As shown in FIG. 3, the vehicle height adjustment device provided by the embodiment of the present application can be applied to a vehicle equipped with a coil spring. Figure 5 As shown in FIG. 4, the vehicle height adjustment device provided by the embodiment of the present application can be applied to a vehicle equipped with an air spring.

[0118] In some embodiments, the vehicle height adjustment device 10 comprises: a hydraulic pump 101, a hydraulic controller 102, a hydraulic distributor 103, and a shock absorber 104; wherein the hydraulic distributor 103 comprises a hydraulic accumulator; the shock absorber 104 comprises a vertical height adjuster 1041, a ball screw structure 1044; the ball screw structure 1044 is composed of a ball screw and a servo motor. The hydraulic controller 102 is connected with the hydraulic pump 101, and is used to control the switching of the hydraulic pump 101; the hydraulic pump 101 is connected with the hydraulic distributor 103 through a hydraulic channel, and is used to inject shock absorber liquid into the hydraulic distributor 103; the hydraulic controller 102 is connected with the ball screw structure 1044, and is used to control the rotation of the servo motor to drive the ball screw to follow. The hydraulic controller 102 is connected with the hydraulic distributor 103, the hydraulic distributor 103 is connected with the vertical height adjuster 1041 through a hydraulic channel, and the hydraulic controller 102 is used to control the switching of the hydraulic distributor 103, and control the communication or closing of the hydraulic channel between the hydraulic distributor 103 and the vertical height adjuster 1041; the hydraulic distributor 103 is connected with a shock absorber compression valve input 1045 and a shock absorber recovery valve input 1046 through a hydraulic channel.

[0119] In some embodiments, the hydraulic controller 102 is used for fault monitoring and road surface management.

[0120] In some embodiments, for fault monitoring, the hydraulic controller 102 judges whether the associated system signal and the actuator signal are faulty, and if the signals are faulty, the height adjustment is prohibited. If the fault occurs when the height adjustment process is in progress, the hydraulic controller 102 drives the hydraulic pump 101 to connect the hydraulic channel to return to the shock absorber circuit through the hydraulic distributor. At this time, the vertical height adjuster 1041 no longer has the height adjustment function. At the same time, the vertical height adjuster 1041 and the ball screw structure 1044 are locked, and the current base height is kept unchanged.

[0121] In some embodiments, for road surface management, the hydraulic controller 102 estimates the road bumping coefficient according to the shock absorber speed and the vertical speed on the spring, and if the road bumping coefficient is too large or the active hydraulic suspension (i.e. an example of the vehicle height adjustment device) enters the dynamic adjustment, it is considered that the road surface or the working condition of the vehicle at this time is not suitable for base height adjustment, and the height adjustment mode is prohibited. If it is found that the road surface is too bumpy or the vehicle needs the hydraulic system to enter the dynamic adjustment working condition during the adjustment process, the hydraulic controller 102 drives the hydraulic pump 101 to connect the hydraulic channel to return to the shock absorber circuit through the hydraulic distributor. At this time, the vertical height adjuster 1041 no longer has the height adjustment function. At the same time, the vertical height adjuster 1041 and the ball screw structure 1042 are locked, and the current base height is kept unchanged.

[0122] In some embodiments, the height adjustment device provided by the embodiments of the present application can be used to adjust the height, when the hydraulic controller 102 does not identify a system failure and the road roughness coefficient is small, which meets the basic height adjustment requirement. When the hydraulic controller 102 receives an external height adjustment request and receives the target adjustment height, it enters the height adjustment mode. The mapping relationship between the servo motor angle and the basic height is established, so as to determine the current height of the vertical height adjuster 1041.

[0123] Further, for the basic height adjustment, first, the hydraulic controller 102 drives the hydraulic circuit distributor to cut off the hydraulic pump 101 flow to the shock absorber 104, closes the shock absorber compression valve input 1045, closes the shock absorber recovery valve input 1046, and makes the shock absorber 104 in the minimum damping state. The hydraulic controller 102 opens the input switch of the hydraulic circuit distributor to the vertical height adjuster 1041, opens the switch of the hydraulic pump 101 connected to the hydraulic accumulator in the hydraulic distributor 103, and opens the hydraulic circuit between the hydraulic pump 101 and the hydraulic accumulator. At the same time, the hydraulic pump 101 provides a basic forward speed to the vertical height adjuster 1041 to inject shock absorber liquid, and raises the height of the vertical height adjuster 1041.

[0124] The ball screw structure 1044 is unlocked, and the height adjustment restriction is cancelled. When the height is adjusted to be raised, the “ball screw-servo motor” performs a stretching action synchronously, when the actual height and the target height difference is within the allowable error range, the hydraulic pump 101 uses the minimum hydraulic pump speed to maintain the current height of the vertical height adjuster 1041.

[0125] Since the ball screw structure 1044 does not have a height adjustment function, when the hydraulic pump 101 only performs a height maintenance action, the servo motor in the stretching action of the ball screw structure 1044 is in a locked state, and at this time the actual height and the target height error is within the allowable range, at this time the hydraulic controller 102 drives the ball screw structure 1044 “ball screw-servo motor” to lock the vertical height adjuster 1041, and stops the height adjustment.

[0126] When the height adjustment is stopped, the hydraulic controller 102 drives the hydraulic circuit distributor to close the input switch of the hydraulic circuit to the vertical height adjuster 1041, and closes the hydraulic accumulator switch. Open the shock absorber compression valve / recovery valve input switch. All adjustment actions are terminated.

[0127] In some embodiments, to reduce the base height, first the hydraulic controller 102 drives the hydraulic circuit distributor to cut off the hydraulic pump 101 flow to the shock absorber 104, closes the shock absorber compression valve input 1045, closes the shock absorber recovery valve input 1046, and makes the shock absorber 104 in the minimum damping state. Open the hydraulic circuit distributor input switch to the vertical height adjuster 1041, open the hydraulic pump 101 switch connected to the hydraulic accumulator in the hydraulic distributor 103, and open the hydraulic circuit between the hydraulic pump 101 and the hydraulic accumulator. At the same time, the hydraulic pump 101 provides a base speed to the vertical height adjuster 1041 to inject shock absorber liquid and maintain the height of the vertical height adjuster 1041.

[0128] The ball screw structure 1044 is unlocked and the height adjustment limit is cancelled. The ball screw structure 1044 is compressed to the lowest height. After the ball screw adjustment is completed, the hydraulic controller 102 adjusts the hydraulic pump 101 to inject or extract shock absorber liquid from the vertical height adjuster 1041 according to the current height and the target height to maintain the target height. When the actual height and the target height difference is within the allowable error range, the hydraulic pump 101 uses the minimum hydraulic pump speed to maintain the current vertical height adjuster 1041 height.

[0129] Since the "ball screw-servo motor" in the ball screw structure 1044 does not have a height adjustment function, when the hydraulic pump 101 only does height maintenance action, the ball screw structure 1044 is driven to stretch from the lowest position, and when the ball screw structure 1044 stretches to the target position, the servo motor in the ball screw structure 1044 is in a locked state, and at this time the actual height and the target height error is within the allowable range, at this time the hydraulic controller 102 drives the "ball screw-servo motor" in the ball screw structure 1044 to lock the vertical height adjuster 1041 and stop height adjustment.

[0130] When the height adjustment is stopped, the hydraulic controller 102 drives the hydraulic circuit distributor to close the hydraulic circuit input switch to the vertical height adjuster 1041 and closes the hydraulic accumulator switch. Open the shock absorber compression valve / recovery valve input switch. All adjustment actions are terminated.

[0131] It can be understood that in the embodiments of the present application, the hydraulic pump 101 is used as the power source for height adjustment without adding additional power sources; the ball screw structure 1044 reduces energy consumption when the vehicle height is maintained; the base height adjustment capability of the coil spring is increased, which improves the adjustment speed of the vehicle base height relative to air springs; without changing the original vehicle coil spring or air spring stiffness, only the base height of the vehicle is adjusted.

[0132] Figure 7 An implementation flowchart of a height adjustment method provided in the embodiments of the present application Figure Two AsFigure 7 As shown, the method comprises steps 701 to 711 as follows:

[0133] Step 701, the hydraulic controller receives a height adjustment request and a target adjustment height;

[0134] Step 702, the hydraulic controller determines whether the system is faulty; if yes, step 711 is executed; otherwise, step 703 is executed;

[0135] Step 703, the hydraulic controller determines whether the road is bumpy; if yes, step 710 is executed; otherwise, step 704 is executed;

[0136] Step 704, the hydraulic controller opens the hydraulic passage between the hydraulic distributor and the vertical height adjuster;

[0137] Step 705, the hydraulic controller adjusts the base height of the vehicle by controlling the hydraulic pump and the hydraulic distributor to inject or inject and then extract hydraulic pressure to the vertical height adjuster;

[0138] Step 706, the hydraulic controller determines whether the target height is reached; if yes, step 707 is executed; otherwise, step 704 is executed;

[0139] Step 707, the hydraulic controller controls the ball screw locking;

[0140] Step 708, the hydraulic controller closes the hydraulic passage between the hydraulic distributor and the vertical height adjuster;

[0141] Step 709, the hydraulic controller determines whether the system is faulty during the execution of steps 704 to 708; if yes, step 711 is executed, and steps 707 and 708 are executed;

[0142] Step 710, the hydraulic controller determines whether it is in the adjustment process; if yes, step 711 is executed, and steps 707 and 708 are executed;

[0143] Step 711, the hydraulic controller outputs a fault alarm and exits the adjustment.

[0144] The above only provides a preferred embodiment of the present application, and the protection scope of the present application is not limited to the above embodiment, but any equivalent modification or change made by those skilled in the art according to the disclosed content of the present application shall be included in the protection scope of the present application.

[0145] Based on the foregoing embodiment, the present application provides a vehicle, Figure 8 A structural schematic diagram of a vehicle provided by the present application is shown in FIG. 1. Figure 8As shown, the vehicle 80 comprises a vehicle height adjusting device 10 provided by the embodiments of the present application; the vehicle height adjusting device 10 is used to realize the vehicle height adjusting method provided by the embodiments of the present application.

[0146] It should be understood that the terms "one embodiment" or "an embodiment" or "some embodiments" or "in an embodiment", as used herein, mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Thus, the appearances of the phrase "in one embodiment" or "in an embodiment" or "in some embodiments" or "in an embodiment" or the like, in various places throughout the specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that the sequence of the above-mentioned processes is not meant to imply that the execution order is prior or posterior, and the execution order of the processes should be determined according to their functions and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The above-mentioned sequence of the embodiments of the present application is only for description, and does not represent the advantages or disadvantages of the embodiments. The above description of each embodiment tends to emphasize the differences between each embodiment, and the same or similar parts can be referred to each other, and for the sake of brevity, the details are not described herein.

[0147] The term "and / or", only describes the association relationship of the associated objects herein, which means that there can be three relationships, for example, object A and / or object B, which can represent the three cases of existence of object A alone, existence of object A and object B together, and existence of object B alone.

[0148] It should be noted that in this document, the terms "comprising", "containing", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, article or device that includes a list of elements not only includes those elements, but also includes other elements not explicitly listed, or inherent to such a process, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, article or device that includes the element.

[0149] In several embodiments provided by the present application, it should be understood that the disclosed devices and apparatuses can be implemented in other ways. The embodiments described above are only illustrative. In addition, the coupling or direct coupling or communication connection between the various components shown or discussed can be indirect coupling or communication connection through some interface, device or module, which can be electrical, mechanical or other form. The features disclosed in the several product embodiments provided by the present application can be combined arbitrarily without conflict, to obtain new product embodiments.

[0150] The above merely provides the implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the change or replacement within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A vehicle height adjustment device, characterized by, The device comprises a hydraulic pump, a hydraulic controller, a hydraulic distributor, a shock absorber, wherein the shock absorber comprises a vertical height adjuster, and wherein The first end of the hydraulic controller is connected to the first end of the hydraulic pump, and the hydraulic controller is configured to send a first control signal to the hydraulic pump to open the hydraulic pump when it is determined that the height of the vehicle is to be adjusted. The second end of the hydraulic pump is connected to the first end of the hydraulic distributor through a first liquid channel, and the hydraulic pump is configured to inject shock absorber liquid into the hydraulic distributor through the first liquid channel. The second end of the hydraulic distributor is connected to the vertical height adjuster in the shock absorber through a second liquid channel, and the hydraulic distributor is configured to inject or inject and then extract shock absorber liquid into the vertical height adjuster through the second liquid channel to adjust the height of the vehicle to the target height.

2. The vehicle height adjustment device according to claim 1, characterized in that The shock absorber further comprises a ball screw and a servo motor, wherein The second end of the hydraulic controller is connected to the servo motor in the shock absorber. The hydraulic controller is configured to control the servo motor to rotate to drive the ball screw to follow, thereby adjusting the position of the limit block while the vertical height adjuster adjusts the height of the vehicle, and the limit block is configured to limit the position of the vertical height adjuster. The third end of the hydraulic controller is connected to the third end of the hydraulic distributor, and the hydraulic controller is further configured to lock the ball screw to lock the vertical height adjuster when the vertical height adjuster adjusts the height of the vehicle to the target height, and send a second control signal to close the second liquid channel.

3. The vehicle height adjustment device according to claim 2, characterized in that The hydraulic controller is further configured to lock the ball screw to lock the vertical height adjuster and send a second control signal to close the second liquid channel when it is determined that one or more of the hydraulic pump, the hydraulic distributor and the shock absorber fail during the height adjustment of the vehicle.

4. The vehicle height adjustment device according to claim 2, characterized in that The hydraulic controller is further configured to lock the ball screw to lock the vertical height adjuster and send a second control signal to close the second liquid channel when it is determined that the bumping coefficient of the current driving surface of the vehicle is greater than the coefficient threshold during the height adjustment of the vehicle.

5. Vehicle height adjustment device according to any one of claims 2 to 4, characterized in that The hydraulic controller is further configured to control the hydraulic pump to reduce the shock absorber liquid input into the hydraulic distributor to keep the height of the vehicle at the target height when it is determined that the vertical height adjuster adjusts the height of the vehicle to the target height, and lock the ball screw to lock the vertical height adjuster.

6. The vehicle height adjustment device according to any one of claims 1 to 4, characterized in that The hydraulic controller is configured to send a first control signal to the hydraulic pump to open the hydraulic pump when it is determined that the height of the vehicle is to be increased to the target height. The hydraulic distributor is configured to inject shock absorber liquid into the vertical height adjuster through the second liquid channel to adjust the height of the vehicle to the target height.

7. The vehicle height adjusting device according to any one of claims 1 to 4, characterized in that The hydraulic controller is configured to send a first control signal to the hydraulic pump to open the hydraulic pump when it is determined that the height of the vehicle is to be reduced to the target height. The hydraulic distributor is configured to inject the shock absorber fluid to the vertical height adjuster through the second fluid passage to maintain the current height of the vehicle; The hydraulic distributor is configured to extract the shock absorber fluid from the vertical height adjuster through the second fluid passage to adjust the current height of the vehicle to the target height of the vehicle.

8. The vehicle height adjustment device according to any one of claims 1 to 4, characterized in that The hydraulic controller is configured to send a first control signal to the hydraulic pump to turn on the hydraulic pump in a case where it is determined that the height of the vehicle is to be adjusted, and in a case where it is determined that the bump coefficient of the current driving surface of the vehicle is less than or equal to a coefficient threshold, and in a case where it is determined that the hydraulic pump, the hydraulic distributor and the shock absorber are all normal.

9. The vehicle height adjusting device according to any one of claims 1 to 4, characterized in that The shock absorber is a device that realizes the shock absorption function based on a coil spring; or the shock absorber is a device that realizes the shock absorption function based on an air spring.

10. A method of adjusting the height of a vehicle, characterized in that The method is applied to the vehicle height adjustment device according to any one of claims 1 to 9, and the method comprises: sending, by a hydraulic controller, a first control signal to the hydraulic pump to turn on the hydraulic pump in a case where it is determined that the height of the vehicle is to be adjusted; injecting, by the hydraulic pump, the shock absorber fluid to the hydraulic distributor based on the first fluid passage; injecting or extracting, by the hydraulic distributor, the shock absorber fluid to or from the vertical height adjuster in the shock absorber based on the second fluid passage to adjust the height of the vehicle to the target height.

11. A vehicle characterized by comprising: The vehicle comprises the vehicle height adjustment device according to any one of claims 1 to 9.

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