CN116771845A - Semi-active hydraulic bushing suspension, vehicle and control method - Google Patents

Abstract

The application provides a semi-active hydraulic bushing suspension, a vehicle and a control method. The semi-active hydraulic bushing mount includes: an outer tube; the main spring is arranged in the outer tube, an upper cavity and a lower cavity and a communication channel which is communicated between the upper cavity and the lower cavity are arranged between the main spring and the inner wall of the outer tube in a surrounding mode, magnetorheological fluid is placed in the upper cavity and the lower cavity, and a core rod used for being connected with the power assembly is arranged in the main spring; the limiting mechanism is arranged in the lower cavity, one end of the limiting mechanism is connected with the outer tube, the other end of the limiting mechanism is arranged towards one side of the axis of the outer tube in a protruding mode, the limiting mechanism is used for limiting the main spring to move towards one side where the limiting mechanism is located, and at least part of the limiting mechanism is arranged towards one side of the outer tube in an adjustable mode. By applying the technical scheme of the application, the damping and limiting distance of the suspension is adjusted according to the whole vehicle requirements under different road conditions, and the problem of low adaptability of the semi-active suspension to complex road conditions in the prior art is solved.

Description

Semi-active hydraulic bushing suspension, vehicle and control method

Technical Field

The application relates to the technical field of automobiles, in particular to a semi-active hydraulic bushing suspension, a vehicle and a control method.

Background

At present, with the development and popularization of electric automobiles, the requirements of the public on NVH and control of the automobiles are gradually increased. In addition, the motor suspension is used as an important vibration isolation system of the vehicle, and the design requirements of the masses on the vehicle are gradually increased. The problem of motor aftershock is taken as a problem that the electric vehicle is generally and purely at the present stage, and the problem is gradually an important sign faced by each host factory.

Conventional suspension parameters are difficult to change once selected, so an optimal compromise is usually found in the design process to determine the parameters. That is, the performance of the vehicle is optimal only under certain conditions; once the conditions change (e.g. road surface changes, acceleration, braking, steering conditions change while the vehicle is running), its performance will be degraded, which means that it is difficult for the conventional suspension to meet both comfort and stability requirements, thus limiting further improvements in vehicle performance. With the development of technology and the improvement of manufacturing process, the application of the controllable suspension in automobiles is possible, and the suspension system is intelligently controlled, so that the controllable suspension has different performances according to different road conditions, thereby coordinating the contradiction between smoothness and stability and providing possibility for expanding the functions of the traditional suspension. A semi-active suspension is a controllable suspension that changes only the suspension damping without changing the suspension stiffness to achieve an adjustment of the suspension performance, and is therefore also referred to as a damped controllable suspension. The structure is relatively simple, the cost is low, the performance is excellent, and the application prospect is wide.

For the above reasons, the application environment of the semi-active suspension is required to be high, and the application range of the semi-active suspension is limited to be large. Therefore, how to improve the structure of the semi-active suspension, so that the semi-active suspension is simple in structure, high in use reliability and flexible in application, and is a technical problem to be solved by the person skilled in the art.

Disclosure of Invention

The application mainly aims to provide a semi-active hydraulic bushing suspension, a vehicle and a control method, which are used for solving the problem that the semi-active suspension in the prior art has low adaptability to complex road conditions.

To achieve the above object, according to one aspect of the present application, there is provided a semi-active hydraulic bushing suspension comprising: an outer tube; the main spring is arranged in the outer tube, an upper cavity and a lower cavity and a communication channel which is communicated between the upper cavity and the lower cavity are arranged between the main spring and the inner wall of the outer tube in a surrounding mode, magnetorheological fluid is placed in the upper cavity and the lower cavity, and a core rod used for being connected with the power assembly is arranged in the main spring; the limiting mechanism is arranged in the lower cavity, one end of the limiting mechanism is connected with the outer tube, the other end of the limiting mechanism is arranged towards one side of the axis of the outer tube in a protruding mode, the limiting mechanism is used for limiting the main spring to move towards one side where the limiting mechanism is located, and at least part of the limiting mechanism is arranged towards one side of the outer tube in an adjustable mode.

Further, the limit mechanism includes: the lower plate is arranged in the lower cavity and is connected with the inner surface of the outer tube; the first end of the telescopic component is connected with the lower plate, and the second end of the telescopic component extends towards one side of the axis of the outer tube; the upper cover is connected with the second end of the telescopic component, and the telescopic component can drive the upper cover to be movably arranged.

Further, the telescoping assembly includes: the first end of flexible main part is connected with the hypoplastron, and the second end of flexible main part extends towards the axis one side of outer tube and sets up, and flexible main part is made by magnetism system telescopic material.

Further, the telescoping assembly further comprises: and the coil is arranged along the circumferential direction of the telescopic main body and is positioned between the lower plate and the upper cover, wherein the viscosity of the magnetorheological fluid can be changed by controlling the power supply state of the coil.

Further, the main spring includes: the main spring body, main spring body axial first side is provided with first cavity, and main spring body axial second side is provided with the second cavity, and the circumference of main spring body is provided with the recess of at least one intercommunication first cavity and second cavity, encloses between the inner wall of first cavity and outer tube and establishes into the cavity, encloses between the inner wall of second cavity and outer tube and establishes into the cavity down, encloses between the inner wall of recess and outer tube and establishes into the intercommunication passageway.

Further, at least one main spring reinforcing rib is arranged in the first cavity.

Further, a buffer cavity is arranged in the main spring body, and the buffer cavity extends along the circumferential direction of the outer tube.

Further, an inner framework is arranged in the outer tube, the inner framework extends along the circumferential direction of the outer tube, and part of the inner framework extends into the main spring body.

Further, a portion of the endoskeleton is positioned between the upper chamber body and the buffer chamber.

According to another aspect of the present application there is provided a vehicle comprising a semi-active hydraulic bushing suspension as described above.

According to another aspect of the present application, there is provided a control method of a vehicle, the control method being for the vehicle, the control method including the steps of: a driving mode of the vehicle is acquired, wherein the driving mode comprises at least one of the following: regular driving mode, comfortable driving mode, and sporty driving mode; a control strategy set is generated based on the driving pattern, the control strategy set being used to control a state of energization of the coil in the semi-active hydraulic bushing mount.

Further, generating a control strategy set based on the driving pattern includes: in the case where the driving mode is determined to be the normal driving mode, a driving speed of the vehicle is acquired; generating a first control strategy in the control strategy set under the condition that the driving speed is determined to be lower than or equal to the preset speed, wherein the first control strategy is used for controlling the coil to be in a power-off state, and generating a second control strategy in the control strategy set under the condition that the driving speed is determined to be higher than the preset speed after the preset time, and the second control strategy is used for controlling the coil to be in a power-on state; and/or under the condition that the driving speed is determined to be in the comfortable driving mode, generating a third control strategy in the control strategy set, wherein the third control strategy is used for controlling the coil to be in a power-off state; and/or generating a fourth control strategy in the control strategy set in case that the driving speed is determined to be in the sport driving mode, wherein the fourth control strategy is used for controlling the coil to be in the energized state.

By adopting the technical scheme of the application, the upper cavity and the lower cavity are formed by surrounding the main spring and the inner wall of the outer tube, magnetorheological fluid is placed in the upper cavity and the lower cavity, and the limiting mechanism is arranged in the lower cavity and used for limiting the main spring to move towards one side where the limiting mechanism is arranged, so that the damping of the suspension is variable and the limiting distance is adjustable, the technical effect of adjusting the damping and the limiting distance of the suspension according to the whole vehicle requirements under different road conditions is achieved, and the problem that the semi-active suspension in the prior art has lower adaptability to complex road conditions is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 shows a schematic structural view of a first embodiment of a semi-active hydraulic bushing suspension according to the present application;

FIG. 2 shows a schematic structural view of a second embodiment of a semi-active hydraulic bushing suspension according to the present application;

FIG. 3 shows a schematic structural view of a third embodiment of a semi-active hydraulic bushing suspension according to the present application;

fig. 4 shows a schematic structural view of a fourth embodiment of a semi-active hydraulic bushing suspension according to the application.

Wherein the above figures include the following reference numerals:

10. an outer tube; 11. an inner skeleton;

20. a main spring;

21. a main spring body; 211. a first cavity; 212. a second cavity; 213. a groove; 214. a main spring reinforcing rib;

22. a buffer chamber;

31. an upper cavity; 32. a lower cavity; 33. a communication passage;

40. a core bar;

50. a limiting mechanism; 51. a lower plate;

52. a telescoping assembly; 521. a telescopic body; 522. a coil;

53. and (5) an upper cover.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.

Referring to fig. 1-4, a semi-active hydraulic bushing suspension is provided according to an embodiment of the present application.

Specifically, the semi-active hydraulic bushing mount includes: an outer tube 10; the main spring 20 is arranged in the outer tube 10, an upper cavity 31 and a lower cavity 32 are arranged between the main spring 20 and the inner wall of the outer tube 10 in a surrounding mode, and a communication channel 33 is communicated between the upper cavity 31 and the lower cavity 32, magnetorheological fluid is placed in the upper cavity 31 and the lower cavity 32, and a core rod 40 used for being connected with a power assembly is arranged in the main spring 20; the limiting mechanism 50, the limiting mechanism 50 is disposed in the lower cavity 32, one end of the limiting mechanism 50 is connected with the outer tube 10, the other end of the limiting mechanism 50 is convexly disposed towards one side of the axis of the outer tube 10, the limiting mechanism 50 is used for limiting the main spring 20 to move towards one side where the limiting mechanism 50 is located, and at least part of the limiting mechanism 50 is adjustably disposed towards one side of the outer tube 10.

In this embodiment, through enclosing between the inner wall of main spring 20 and outer tube 10 and establishing into cavity 31 and lower cavity 32, have placed magnetorheological fluid in cavity 31 and the lower cavity 32 to set up stop gear in lower cavity 32, be used for restricting the main spring 20 and remove towards the one side that stop gear 50 is located, realized that the damping of suspension is changeable and spacing distance is adjustable, reach the damping of suspension and spacing distance according to the whole car demand under different road conditions and carry out the technological effect of adjusting, solve the semi-initiative suspension among the prior art and to the lower problem of complex road conditions adaptability.

In the above embodiment, the outer tube 10 and the main spring 20 are fixed by interference fit and turn-over press-fitting, and the main spring 20 is optionally provided as a rubber main spring, so that the power assembly suspension system is ensured to have enough vertical and rolling flexibility and larger lateral rigidity, and meanwhile, the purpose that the rigidity of the rubber main spring of the hydraulic suspension is smaller than that of the traditional rubber suspension is easily realized, thereby being beneficial to reducing the adverse effect of high-frequency standing wave vibration of the rubber main spring and better buffering the impact force caused by uneven road surfaces.

The stopper mechanism 50 includes: a lower plate 51, the lower plate 51 being disposed in the lower chamber 32, the lower plate 51 being connected to the inner surface of the outer tube 10; the telescopic assembly 52, the first end of the telescopic assembly 52 is connected with the lower plate 51, the second end of the telescopic assembly 52 extends towards one side of the axis of the outer tube 10; the upper cover 53, the upper cover 53 is connected with the second end of the telescopic component 52, and the telescopic component 52 can drive the upper cover 53 to be movably arranged. As shown in fig. 2 and 3, the limiting mechanism 50 includes a lower plate 51, a telescopic assembly 52 and an upper cover 53, so that the telescopic assembly 52 drives the upper cover 53 to move, and adjustment of the limiting distance of the semi-active hydraulic bushing suspension is achieved. In this embodiment, the magnetostrictive material is added to the limiting structure to achieve the limiting adjustability, and optionally, the purpose of changing the limiting distance through the magnetostrictive material can be achieved by adopting designs of different limiting structures.

Further, the telescoping assembly 52 includes: the telescopic body 521, the first end of the telescopic body 521 is connected to the lower plate 51, the second end of the telescopic body 521 extends toward the axis of the outer tube 10, and the telescopic body 521 is made of a magnetic telescopic material. As shown in fig. 3, in the present embodiment, the first end of the telescopic body 521 is connected to the lower plate 51, and the second end is extended toward the axis side of the outer tube 10, and optionally, the second end of the telescopic body 521 is connected to the upper cover 53. The telescopic main body 521 is made of magnetic telescopic materials, and is not limited to rare earth giant magnetostrictive materials terbium dysprosium iron alloy (GMM, terfenol-D), brittleness improved terbium dysprosium iron alloy (TD-plus), iron gallium alloy (Galfenol), magnetic control shape memory alloy (MSMA) Ni-Mn-Ga, magnetostrictive waveguide wires, iron cobalt vanadium alloy, iron nickel alloy, pure nickel, iron aluminum alloy and the like.

Further, the telescoping assembly 52 further includes: and a coil 522, the coil 522 being disposed along a circumferential direction of the telescopic body 521, and the coil 522 being located between the lower plate 51 and the upper cover 53, wherein controlling a power supply state of the coil 522 can change a viscosity of the magnetorheological fluid. In this embodiment, as shown in fig. 3, the coil 522 is wound around the outer portion of the telescopic main body 521, one end of the coil 522 is connected with an external electromagnetic valve, when the coil 522 is electrified, the telescopic main body 521 is extended under the influence of a magnetic field generated by the coil 522, and the upper cover 53 is pushed upwards, so that the limit distance is shortened, when the coil 522 is deenergized, the magnetic field disappears, the telescopic main body 521 recovers the original length, and the limit distance is increased to a design state, so that the telescopic assembly 52 can drive the upper cover 53 to move, the adjustment of the limit distance of the semi-active hydraulic bushing suspension is realized, and the purpose of damping variability is achieved by replacing conventional liquid with magnetorheological liquid.

In the above embodiment, when the coil 522 in the telescopic component 52 is energized, the magnetorheological fluid is affected by the magnetic field to have high viscosity, when the coil 522 in the telescopic component 52 is deenergized, the magnetic field disappears, and the magnetorheological fluid has high fluidity, so that the damping characteristic of the magnetorheological fluid can be changed by the magnetic field, the adjustment of the suspension performance can be further realized, and the adaptability of the semi-active hydraulic bushing suspension to different road conditions can be improved. When the suspension has high damping and small limiting distance, the vehicle has better operability, can better adapt to the road impact condition of the vehicle, and when the suspension has low damping and large limiting distance, the vehicle has better NVH performance. The adaptability of the semi-active hydraulic bushing suspension to different road conditions is improved, and the semi-active hydraulic bushing suspension can be more flexibly applied to application scenes while the reliability is high. In this embodiment, the externally applied magnetic field is realized by other means than winding the coil.

The main spring 20 includes: the main spring body 21, main spring body 21 axial first side is provided with first cavity 211, main spring body 21 axial second side is provided with second cavity 212, the circumference of main spring body 21 is provided with at least one recess 213 that communicate first cavity 211 and second cavity 212, enclose between the inner wall of first cavity 211 and outer tube 10 and establish into cavity 31, enclose between the inner wall of second cavity 212 and outer tube 10 and establish into cavity 32 down, enclose between recess 213 and the inner wall of outer tube 10 and establish into intercommunication passageway 33. As shown in fig. 2 to 4, in the present embodiment, when the core rod 40 is forced to move upward, the magnetorheological fluid is extruded from the upper cavity 31 into the lower cavity 32 through the communication channel 33, and when the suspension core rod 40 is forced to move downward, the magnetorheological fluid is extruded from the lower cavity 32 into the upper cavity 31 through the communication channel 33. When the coil 522 in the telescopic component 52 is electrified, the magnetorheological fluid is influenced by the magnetic field to present high viscosity, when the coil 522 in the telescopic component 52 is powered off, the magnetic field disappears, and the magnetorheological fluid presents high fluidity, so that the damping characteristic of the magnetorheological fluid can be changed through the magnetic field, and further the adjustment of the suspension performance can be realized. When the suspension has high damping and small limiting distance, the vehicle has better operability, can better adapt to the road impact condition of the vehicle, and when the suspension has low damping and large limiting distance, the vehicle has better NVH performance. The adaptability of the semi-active hydraulic bushing suspension to different road conditions is improved, and the semi-active hydraulic bushing suspension can be more flexibly applied to application scenes while the reliability is high.

At least one main spring reinforcing rib 214 is provided in the first cavity 211. The arrangement can enhance the strength and rigidity of the main spring under the condition of not increasing the wall thickness of the main spring so as to save the material consumption, and can also overcome the distortion deformation caused by uneven stress of the main spring due to the wall thickness difference, thereby reducing the weight of the semi-active hydraulic bushing suspension, reducing the production cost of the semi-active hydraulic bushing suspension and increasing the practicability of the semi-active hydraulic bushing suspension.

Further, a damper chamber 22 is provided in the main spring body 21, and the damper chamber 22 is provided to extend in the circumferential direction of the outer tube 10. The arrangement can further play a role in buffering and shock absorption, and the reliability of the semi-active hydraulic bushing suspension is improved.

Further, an inner frame 11 is provided in the outer tube 10, the inner frame 11 is provided to extend in the circumferential direction of the outer tube 10, and a part of the inner frame 11 extends into the main spring body 21. In this embodiment, as shown in fig. 2, the sample arrangement can play a certain supporting role on the main spring, so that the inner skeleton 11, the core rod 40 and the main spring body 21 are vulcanized together, and the suspension structure of the semi-active hydraulic bushing is firmer. Specifically, in the present embodiment, the core rod 40 is an aluminum core, which has better oxidation resistance and corrosion resistance, and is practical and economical, and reduces the production cost of the semi-active hydraulic bushing suspension.

Further, a part of the inner frame 11 is located between the upper chamber 31 and the buffer chamber 22. Referring to fig. 2 and fig. 4, in this embodiment, the arrangement can provide an installation base for the upper cavity 31 and the buffer cavity 22, so that the inner frame 11 and the limit mechanism 50 are in interference fit and press fit for fixing, after the magnetorheological fluid is vacuumized and filled through the hole at the sealing steel ball, the sealing steel ball is in interference fit and press fit to the inner frame 5, and the structure of the semi-active hydraulic bushing suspension is firmer.

According to one embodiment of the present application, a vehicle is provided comprising the semi-active hydraulic bushing suspension described above.

Specifically, the semi-active hydraulic bushing mount includes: an outer tube 10; the main spring 20 is arranged in the outer tube 10, an upper cavity 31 and a lower cavity 32 are arranged between the main spring 20 and the inner wall of the outer tube 10 in a surrounding mode, and a communication channel 33 is communicated between the upper cavity 31 and the lower cavity 32, magnetorheological fluid is placed in the upper cavity 31 and the lower cavity 32, and a core rod 40 used for being connected with a power assembly is arranged in the main spring 20; the limiting mechanism 50, the limiting mechanism 50 is disposed in the lower cavity 32, one end of the limiting mechanism 50 is connected with the outer tube 10, the other end of the limiting mechanism 50 is convexly disposed towards one side of the axis of the outer tube 10, the limiting mechanism 50 is used for limiting the main spring 20 to move towards one side where the limiting mechanism 50 is located, and at least part of the limiting mechanism 50 is adjustably disposed towards one side of the outer tube 10. In this embodiment, through enclosing between the inner wall of main spring 20 and outer tube 10 and establishing into cavity 31 and lower cavity 32, have placed magnetorheological fluid in cavity 31 and the lower cavity 32 to set up stop gear in lower cavity 32, be used for restricting the main spring 20 and remove towards the one side that stop gear 50 is located, realized that the damping of suspension is changeable and spacing distance is adjustable, reach the damping of suspension and spacing distance according to the whole car demand under different road conditions and carry out the technological effect of adjusting, solve the semi-initiative suspension among the prior art and to the lower problem of complex road conditions adaptability.

In the above embodiment, when the core rod 40 is forced to move upward, the magnetorheological fluid is extruded from the upper cavity 31 into the lower cavity 32 through the communication channel 33, and when the suspension core rod 40 is forced to move downward, the magnetorheological fluid is extruded from the lower cavity 32 into the upper cavity 31 through the communication channel 33. When the coil 522 in the telescoping assembly 52 is energized, the magnetorheological fluid is affected by the magnetic field to exhibit a high viscosity, and when the coil 522 in the telescoping assembly 52 is de-energized, the magnetic field is lost and the magnetorheological fluid exhibits a high flowability. When the suspension has high damping and small limiting distance, the vehicle has better operability, can better adapt to the road impact condition of the vehicle, and when the suspension has low damping and large limiting distance, the vehicle has better NVH performance. The adaptability of the semi-active hydraulic bushing suspension to different road conditions is improved, and the semi-active hydraulic bushing suspension can be more flexibly applied to application scenes while the reliability is high.

According to another embodiment of the present application, there is provided a control method of a vehicle, the control method being used for the vehicle in the above embodiment, the control method including the steps of: a driving mode of the vehicle is acquired, wherein the driving mode comprises at least one of the following: regular driving mode, comfortable driving mode, and sporty driving mode; a control strategy set is generated based on the driving pattern, the control strategy set being used to control a state of energization of the coil in the semi-active hydraulic bushing mount. In this embodiment, the vehicle with the semi-active hydraulic bushing suspension can generate different control strategies according to different driving modes, the state of the coil in the semi-active hydraulic bushing suspension is controlled to be electrified, and damping and limiting distances of the suspension are adjusted according to the whole vehicle requirements under different road conditions, so that the adaptability of the tea cool with the semi-active hydraulic bushing suspension to different road conditions in the embodiment is realized, the reliability of the vehicle with the semi-active hydraulic bushing suspension is improved, the application scene is more flexible, and the driving comfort of a driver is further improved.

Further, generating a control strategy set based on the driving pattern includes: in the case where the driving mode is determined to be the normal driving mode, a driving speed of the vehicle is acquired; generating a first control strategy in the control strategy set under the condition that the driving speed is determined to be lower than or equal to the preset speed, wherein the first control strategy is used for controlling the coil to be in a power-off state, and generating a second control strategy in the control strategy set under the condition that the driving speed is determined to be higher than the preset speed after the preset time, and the second control strategy is used for controlling the coil to be in a power-on state; and/or under the condition that the driving speed is determined to be in the comfortable driving mode, generating a third control strategy in the control strategy set, wherein the third control strategy is used for controlling the coil to be in a power-off state; and/or generating a fourth control strategy in the control strategy set in case that the driving speed is determined to be in the sport driving mode, wherein the fourth control strategy is used for controlling the coil to be in the energized state. In this embodiment, the vehicle with the semi-active hydraulic bushing suspension can generate different control strategies according to different driving modes, control the electrified state of the coil in the semi-active hydraulic bushing suspension, and adjust the damping and limiting distance of the suspension according to the whole vehicle requirements under different road conditions, so as to realize the adaptability of the active hydraulic bushing suspension to different road conditions in the above embodiment, and enable the reliability of the semi-active hydraulic bushing suspension to be high and to be more flexibly applied to application scenes.

In another embodiment of the application, when the vehicle is in a normal driving mode and the vehicle speed is lower than 10km/h, the coil 522 is powered off, no magnetic field exists, the telescopic main body 521 keeps the original length, the magnetorheological fluid presents high fluidity, the linear section of the suspension limiting distance is larger, the damping is lower, and the NVH performance requirements under the starting/flameout and creeping working conditions are met. When the vehicle speed is higher than 10km/h, the coil 522 is electrified to generate a magnetic field, the telescopic main body 521 is elongated, the magnetorheological fluid presents high viscosity, the linear section of the suspension limiting distance is reduced, the damping is higher, the NVH performance requirement under the impact working condition is met, and particularly when the vehicle passes through a pit bank or a deceleration strip, the problem of electric drive aftershock is thoroughly solved, and the vehicle has better operability at the moment.

In another embodiment of the present application, the vehicle is in a comfortable driving mode, when the coil 522 is powered off and has no magnetic field, the telescopic main body 521 keeps the original length, the magnetorheological fluid has high fluidity, the linear section of the suspension limit distance is larger, the damping is lower, and the vehicle has good NVH performance.

In another embodiment of the present application, when the vehicle is in the moving driving mode, the coil 522 is energized to generate a magnetic field, the telescopic body 521 is extended, the magnetorheological fluid has high viscosity, the linear section of the suspension limit distance is reduced, the damping is higher, and the vehicle has good operability

From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

through enclose between the inner wall of main spring and outer tube and establish into cavity and lower cavity, put magnetorheological fluid in last cavity and the lower cavity to set up stop gear in the cavity down, be used for restricting the main spring and remove towards one side at stop gear place, it is adjustable to have realized the damping of suspension and spacing distance, reach the technological effect of adjusting damping and spacing distance of suspension according to the whole car demand under the different road conditions, the problem that semi-initiative suspension among the solution prior art is lower to complicated road conditions adaptability.

When the core rod is forced to move upwards, the magnetorheological fluid is extruded into the lower cavity through the communication channel, when the suspension core rod is forced to move downwards, the magnetorheological fluid is extruded into the upper cavity through the communication channel, when the coil in the telescopic assembly is electrified, the magnetorheological fluid is influenced by the magnetic field to present high viscosity, when the coil in the telescopic assembly is powered off, the magnetic field disappears, and the magnetorheological fluid presents high fluidity. When the suspension has high damping and small limiting distance, the vehicle has better operability, can better adapt to the road impact condition of the vehicle, and when the suspension has low damping and large limiting distance, the vehicle has better NVH performance. The adaptability of the semi-active hydraulic bushing suspension to different road conditions is improved, and the semi-active hydraulic bushing suspension can be more flexibly applied to application scenes while the reliability is high.

There is provided a control method of a vehicle, the control method including the steps of: a driving mode of the vehicle is acquired, wherein the driving mode comprises at least one of the following: regular driving mode, comfortable driving mode, and sporty driving mode; a control strategy set is generated based on the driving pattern, the control strategy set being used to control a state of energization of the coil in the semi-active hydraulic bushing mount. The vehicle with the semi-active hydraulic bushing suspension can generate different control strategies according to different driving modes, the coil in the semi-active hydraulic bushing suspension is controlled to be electrified, and the suspension control strategy can be adjusted according to actual whole vehicle requirements. Damping and spacing distance to the suspension are adjusted according to the whole car demand under different road conditions to realize the cold adaptability to different road conditions of tea that has semi-initiative hydraulic bushing suspension in the above-mentioned embodiment, make the vehicle reliability that has semi-initiative hydraulic bushing suspension improve, application scene is more nimble, and then improves driver's driving comfort level.

When the vehicle is in a normal driving mode, and the speed of the vehicle is lower than 10km/h, the coil is powered off, no magnetic field exists, the telescopic main body keeps the original length, the magnetorheological fluid presents high fluidity, the linear section of the suspension limiting distance is larger, the damping is lower, and the NVH performance requirements under the starting/flameout and creeping working conditions are met. When the vehicle speed is higher than 10km/h, the coil is electrified to generate a magnetic field, the telescopic main body stretches, the magnetorheological fluid presents high viscosity, the linear section of the suspension limiting distance is reduced, the damping is higher, the NVH performance requirement under the impact working condition is met, and particularly when the vehicle passes through a pit bank or a deceleration strip, the problem of electric drive aftershock is thoroughly solved, and the vehicle has better operability at the moment.

The vehicle is in comfortable driving mode, and the coil outage does not have the magnetic field this moment, and flexible main part keeps former length, and magnetorheological suspensions presents high fluidity, and the spacing distance linear section of suspension is great, and the damping is lower, and the vehicle possesses good NVH performance.

When the vehicle is in a motion driving mode, the coil is electrified to generate a magnetic field, the telescopic main body stretches, the magnetorheological fluid presents high viscosity, the linear section of the suspension limiting distance is reduced, the damping is high, and the vehicle has good operability

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., indicate that the particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application, as generally described. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the application.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (12)

1. A semi-active hydraulic bushing mount, comprising:

an outer tube (10);

the main spring (20), main spring (20) set up in outer tube (10), enclose between main spring (20) and the inner wall of outer tube (10) and establish into cavity (31) and lower cavity (32) on, and communicate cavity (31) on with cavity (32) between intercommunication passageway (33) down, be placed magnetorheological fluid in cavity (31) on with cavity (32) down, be provided with in main spring (20) be used for with power assembly connection core bar (40);

stop gear (50), stop gear (50) set up in lower cavity (32), the one end of stop gear (50) with outer tube (10) are connected, the other end of stop gear (50) is towards the axis one side protrusion ground setting of outer tube (10), stop gear (50) are used for limiting main spring (20) orientation stop gear (50) place one side removal, and at least part stop gear (50) orientation the length of outer tube (10) one side is adjustable to be set up.

2. The semi-active hydraulic bushing suspension according to claim 1, wherein the limit mechanism (50) comprises:

a lower plate (51), wherein the lower plate (51) is arranged in the lower cavity (32), and the lower plate (51) is connected with the inner surface of the outer tube (10);

the first end of the telescopic component (52) is connected with the lower plate (51), and the second end of the telescopic component (52) extends towards one side of the axis of the outer tube (10);

the upper cover (53), upper cover (53) with flexible subassembly (52) second end is connected, flexible subassembly (52) can drive upper cover (53) movably sets up.

3. The semi-active hydraulic bushing mount according to claim 2, wherein the telescoping assembly (52) comprises:

and a telescopic body (521), wherein a first end of the telescopic body (521) is connected with the lower plate (51), a second end of the telescopic body (521) extends towards one side of the axis of the outer tube (10), and the telescopic body (521) is made of a magnetic telescopic material.

4. A semi-active hydraulic bushing suspension according to claim 3, wherein the telescopic assembly (52) further comprises:

and a coil (522), wherein the coil (522) is arranged along the circumferential direction of the telescopic main body (521), and the coil (522) is positioned between the lower plate (51) and the upper cover (53), and the viscosity of the magnetorheological fluid can be changed by controlling the power supply state of the coil (522).

5. A semi-active hydraulic bushing suspension according to claim 1, characterized in that the main spring (20) comprises:

main spring body (21), main spring body (21) axial first side is provided with first cavity (211), main spring body (21) axial second side is provided with second cavity (212), the circumference of main spring body (21) is provided with at least one intercommunication first cavity (211) with recess (213) of second cavity (212), enclose between the inner wall of first cavity (211) with outer tube (10) and establish into cavity (31) up, enclose between second cavity (212) with enclose between the inner wall of outer tube (10) and establish into cavity (32) down, enclose between recess (213) with enclose between the inner wall of outer tube (10) into intercommunication passageway (33).

6. A semi-active hydraulic bushing suspension according to claim 5, characterized in that at least one main spring reinforcement rib (214) is provided in the first cavity (211).

7. A semi-active hydraulic bushing suspension according to claim 6, characterized in that a buffer chamber (22) is provided in the main spring body (21), which buffer chamber (22) is arranged extending in the circumferential direction of the outer tube (10).

8. A semi-active hydraulic bushing suspension according to claim 7, characterized in that an inner skeleton (11) is provided in the outer tube (10), the inner skeleton (11) being arranged extending in the circumferential direction of the outer tube (10), part of the inner skeleton (11) extending into the main spring body (21).

9. A semi-active hydraulic bushing suspension according to claim 8, characterized in that part of the inner skeleton (11) is located between the upper cavity (31) and the buffer cavity (22).

10. A vehicle comprising a semi-active hydraulic bushing mount, characterized in that the semi-active hydraulic bushing mount is a semi-active hydraulic bushing mount according to any one of claims 1 to 9.

11. A control method of a vehicle for controlling the vehicle according to claim 10, characterized by comprising the steps of:

obtaining a driving mode of the vehicle, wherein the driving mode comprises at least one of the following: regular driving mode, comfortable driving mode, and sporty driving mode;

a control strategy set is generated based on the driving pattern, the control strategy set for controlling a state of energization of a coil in the semi-active hydraulic bushing mount.

12. The control method according to claim 11, characterized in that generating the control strategy set based on the driving pattern includes:

acquiring a driving speed of the vehicle in a case where the driving mode is determined to be the normal driving mode;

generating a first control strategy in the control strategy set under the condition that the driving speed is lower than or equal to a preset speed, wherein the first control strategy is used for controlling the coil to be in a power-off state, and generating a second control strategy in the control strategy set under the condition that the driving speed is higher than the preset speed after a preset time, and the second control strategy is used for controlling the coil to be in a power-on state; and/or

Generating a third control strategy in the control strategy set under the condition that the driving speed is determined to be in the comfortable driving mode, wherein the third control strategy is used for controlling the coil to be in a power-off state; and/or

And generating a fourth control strategy in the control strategy set under the condition that the driving speed is determined to be in the sport driving mode, wherein the fourth control strategy is used for controlling the coil to be in an electrified state.