CN112238721A - Vehicle, interconnection type vehicle suspension system and control method thereof - Google Patents
Vehicle, interconnection type vehicle suspension system and control method thereof Download PDFInfo
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- CN112238721A CN112238721A CN201910647454.0A CN201910647454A CN112238721A CN 112238721 A CN112238721 A CN 112238721A CN 201910647454 A CN201910647454 A CN 201910647454A CN 112238721 A CN112238721 A CN 112238721A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
- B60G13/02—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally
- B60G13/06—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally of fluid type
- B60G13/10—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally of fluid type pneumatic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/0152—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit
- B60G17/0155—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit pneumatic unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
- B60G17/01933—Velocity, e.g. relative velocity-displacement sensors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/06—Characteristics of dampers, e.g. mechanical dampers
- B60G17/08—Characteristics of fluid dampers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/20—Type of damper
- B60G2202/24—Fluid damper
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention relates to a vehicle, an interconnected vehicle suspension system and a control method thereof. And in the normal running process of the vehicle, controlling the control valves to be opened, detecting a steering signal and a braking signal of the vehicle in real time, and controlling the control valves to be closed when the steering or braking of the vehicle is detected. The communication relation between each gasbag is controlled according to different running states, the adaptability of the vehicle to different road conditions is enhanced, sufficient roll stability can be provided when bending and braking are guaranteed, the safety is guaranteed, excitation of different frequencies from the road surface can be isolated in the normal driving process of the vehicle, vibration is attenuated, better riding comfort is provided, and good riding comfort is guaranteed while the operation stability is considered.
Description
Technical Field
The invention relates to a vehicle, an interconnected vehicle suspension system and a control method thereof.
Background
When a vehicle passes through a poor road surface, the vehicle often has great uncomfortable problems such as large impact feeling, severe bump and the like due to the fact that the vehicle often appears on the bumpy road surface such as a speed bump and the like in the driving process, customers complain about the bumpy road surface, and passengers are extremely uncomfortable to sit on the bumpy road surface. The main reason is that when a vehicle passes through a large pothole road surface, the dynamic stiffness of the suspension changes greatly, so that the self-vibration frequency of the vehicle is obviously increased, the vertical vibration amplitude and frequency of the vehicle are increased, and finally the comfort of the vehicle is deteriorated. However, if the stiffness of the suspension is reduced, there is a problem that the steering is insufficient, the roll feeling is large, and the ride safety is reduced. Balance and improvement of operation stability and riding comfort become difficult problems which are urgently needed to be solved in the chassis technology.
The invention discloses an interconnected air suspension system in a Chinese patent document with an authorization publication number of CN104786772B, which comprises four air spring shock absorbers respectively arranged at the front, the rear, the left and the right of a vehicle, wherein each air spring shock absorber is composed of an air spring (namely an air bag) and a shock absorber, a semi-active suspension technology is introduced into the interconnected air suspension technology, the effects of adjusting the roll characteristic and the pitch characteristic of the vehicle are achieved by greatly improving the interconnection mode of the optional interconnected air suspensions, the interconnection state of the shock absorbers is integrated into the semi-active control category, the adjustment state set is greatly expanded, and the running smoothness of the vehicle is further improved while the turning, starting and braking performances of the vehicle are ensured. However, this system has the following problems: firstly, suspension control is realized by simultaneously utilizing an air spring and a shock absorber, the shock absorber and the air spring are integrated into a whole, and the shock absorber is interconnected to play a role in anti-side-tipping, wherein the shock absorber has lower reliability and is easy to break down, so that the reliability of the whole air suspension system is lower; moreover, the system simultaneously utilizes the air spring and the shock absorber, so that the system structure is relatively complex, correspondingly, the system has more fault points, and the reliability of the whole air suspension system is also influenced.
Disclosure of Invention
The invention aims to provide a vehicle, an interconnection type vehicle suspension system and a control method thereof, which are used for solving the problem of low reliability of the existing interconnection type air suspension system.
In order to achieve the above object, the scheme of the invention comprises:
an interconnected vehicle suspension system comprises a left front airbag, a left rear airbag, a right front airbag and a right rear airbag, wherein each airbag comprises an upper airbag body and a lower piston, an upper cavity of the airbag is formed in the upper airbag body, a lower cavity of the airbag is formed in the lower piston, the upper cavity of the left front airbag is connected with the lower cavity of the right front airbag through a first connecting pipeline, the lower cavity of the right front airbag is connected with the upper cavity of the right rear airbag through a second connecting pipeline, the upper cavity of the right rear airbag is connected with the lower cavity of the left rear airbag through a third connecting pipeline, and the lower cavity of the left rear airbag is connected with the upper cavity of the left front airbag through a fourth connecting pipeline; the lower cavity of the left front airbag is connected with the upper cavity of the right front airbag through a fifth connecting pipeline, the upper cavity of the right front airbag is connected with the lower cavity of the right rear airbag through a sixth connecting relation, the lower cavity of the right rear airbag is connected with the upper cavity of the left rear airbag through a seventh connecting pipeline, the upper cavity of the left rear airbag is connected with the lower cavity of the left front airbag through an eighth connecting pipeline, and each connecting pipeline is provided with a control valve; the interconnected vehicle suspension system further comprises a control module, a steering detection module and a brake signal detection module, wherein the sampling signal input end of the control module is connected with the steering detection module and the brake signal detection module, and the control signal output end of the control module is connected with each control valve.
The air bags arranged on the front, the rear, the left and the right of the vehicle, the corresponding connecting pipelines and other related structures form an interconnected vehicle suspension system, when the control valves on the connecting pipelines are opened, the upper cavities and the lower cavities of the air bags are correspondingly communicated, so that the dynamic stiffness of the air bags can be reduced, and the riding comfort of the vehicle is improved; when the control valves on the connecting pipelines are closed, the air bags are not communicated, the air bags form a closed space, the effective dynamic stiffness of the air bags is increased, and the safety of the vehicle is improved. Moreover, compared with the mode that the suspension control can be realized only by simultaneously acting the air spring and the shock absorber in the prior art, the core mechanism for comfort and safety in the vehicle suspension system only has the air bag, so that the structure is greatly simplified, correspondingly, the number of fault points of the system is greatly reduced, and the reliability of the system is further improved; moreover, the possibility of the shock absorber failing is avoided, and the reliability of the whole system is improved. In addition, the steering signal is detected through the steering detection module, the brake signal is detected through the brake signal detection module, and the states of the control valves are controlled according to the steering signal and the brake signal, so that the suspension system of the vehicle is correspondingly controlled according to the running state of the vehicle, and the comfort and the safety are improved.
Further, in order to further improve the detection reliability of the steering signal, the steering detection module comprises a steering wheel angle detection module and a lateral acceleration detection module.
Furthermore, in order to improve the control reliability of the suspension, the interconnected vehicle suspension system further comprises a vehicle speed detection module, and the sampling signal input end of the control module is connected with the vehicle speed detection module.
Furthermore, in order to visually display the states of the control valves, the interconnected vehicle suspension system further comprises state indicator lamps corresponding to the states of the control valves, and the control signal output end of the control module is connected with the state indicator lamps.
A vehicle comprises a vehicle body and an interconnected vehicle suspension system, wherein the interconnected vehicle suspension system comprises a left front airbag, a left rear airbag, a right front airbag and a right rear airbag, each airbag comprises an upper airbag body and a lower piston, an upper cavity of the airbag is formed in the upper airbag body, a lower cavity of the airbag is formed in the lower piston, the upper cavity of the left front airbag is connected with the lower cavity of the right front airbag through a first connecting pipeline, the lower cavity of the right front airbag is connected with the upper cavity of the right rear airbag through a second connecting pipeline, the upper cavity of the right rear airbag is connected with the lower cavity of the left rear airbag through a third connecting pipeline, and the lower cavity of the left rear airbag is connected with the upper cavity of the left front airbag through a fourth connecting pipeline; the lower cavity of the left front airbag is connected with the upper cavity of the right front airbag through a fifth connecting pipeline, the upper cavity of the right front airbag is connected with the lower cavity of the right rear airbag through a sixth connecting relation, the lower cavity of the right rear airbag is connected with the upper cavity of the left rear airbag through a seventh connecting pipeline, the upper cavity of the left rear airbag is connected with the lower cavity of the left front airbag through an eighth connecting pipeline, and each connecting pipeline is provided with a control valve; the interconnected vehicle suspension system further comprises a control module, a steering detection module and a brake signal detection module, wherein the sampling signal input end of the control module is connected with the steering detection module and the brake signal detection module, and the control signal output end of the control module is connected with each control valve.
The air bags arranged on the front, the rear, the left and the right of the vehicle, the corresponding connecting pipelines and other related structures form an interconnected vehicle suspension system, when the control valves on the connecting pipelines are opened, the upper cavities and the lower cavities of the air bags are correspondingly communicated, so that the dynamic stiffness of the air bags can be reduced, and the riding comfort of the vehicle is improved; when the control valves on the connecting pipelines are closed, the air bags are not communicated, the air bags form a closed space, the effective dynamic stiffness of the air bags is increased, and the safety of the vehicle is improved. Moreover, compared with the mode that the suspension control can be realized only by simultaneously acting the air spring and the shock absorber in the prior art, the core mechanism for comfort and safety in the vehicle suspension system only has the air bag, so that the structure is greatly simplified, correspondingly, the number of fault points of the system is greatly reduced, and the reliability of the system is further improved; moreover, the possibility of the shock absorber failing is avoided, and the reliability of the whole system is improved. In addition, the steering signal is detected through the steering detection module, the brake signal is detected through the brake signal detection module, and the states of the control valves are controlled according to the steering signal and the brake signal, so that the suspension system of the vehicle is correspondingly controlled according to the running state of the vehicle, and the comfort and the safety are improved.
Further, in order to further improve the detection reliability of the steering signal, the steering detection module comprises a steering wheel angle detection module and a lateral acceleration detection module.
Furthermore, in order to improve the control reliability of the suspension, the interconnected vehicle suspension system further comprises a vehicle speed detection module, and the sampling signal input end of the control module is connected with the vehicle speed detection module.
Furthermore, in order to visually display the states of the control valves, the interconnected vehicle suspension system further comprises state indicator lamps corresponding to the states of the control valves, and the control signal output end of the control module is connected with the state indicator lamps.
The control method of the special interconnected vehicle suspension system controls the control valves to be opened in the normal running process of the vehicle, detects relevant signals of the vehicle in real time, wherein the relevant signals of the vehicle comprise steering signals and braking signals, and controls the control valves to be closed when the vehicle is detected to be steered or braked.
The steering signal is detected through the steering detection module, the brake signal is detected through the brake signal detection module, and the state of each control valve is controlled according to the steering signal or the brake signal, so that the suspension system of the vehicle is correspondingly controlled according to the running state of the vehicle, and the comfort and the safety are improved.
Further, in order to improve the control reliability, the vehicle-related signals further include a vehicle acceleration signal, and when the vehicle acceleration signal is detected to be greater than a set acceleration threshold, each control valve is controlled to be closed.
Further, in order to improve control reliability, when the vehicle speed of the vehicle is 0, each control valve is controlled to be opened.
Drawings
FIG. 1 is a schematic diagram of the general layout of an interconnected vehicle suspension system provided by the present invention;
FIG. 2 is a schematic structural view of an airbag provided by the present invention;
FIG. 3 is a schematic diagram of one embodiment of an interconnected vehicle suspension system provided by the present invention;
wherein 100 is the gasbag, 200 is the control valve, 300 is the pipeline, 1 is right front gasbag, 2 is the solenoid valve, 3 is first total connecting line, 4 is the controller, 5 is the status indicator lamp, 6 is left front gasbag, 7 is left back gasbag, 8 is right back gasbag, 9 is second total connecting line.
Detailed Description
The embodiment of the vehicle is as follows:
the present embodiment provides a vehicle including a vehicle body and an interconnected vehicle suspension system, and since the vehicle body is conventional technology and is not the point of the invention of the present application, the present embodiment will not be described in detail. The following description will be directed to an interconnected vehicle suspension system. The vehicle body comprises a vehicle body, the interconnected vehicle suspension system is arranged between the vehicle body and an axle assembly, the upper end of the interconnected vehicle suspension system is connected with the vehicle body, and the lower end of the interconnected vehicle suspension system is connected with the axle assembly, as shown in fig. 1.
As shown in fig. 1, the structure of an interconnected vehicle suspension system generally comprises three major parts: respectively, bladder 100, control valve 200, and conduit 300. In this embodiment, the control valve 200 is exemplified by a solenoid valve.
Figure 2 shows one configuration of bladder 100 that includes an upper bladder body, which forms an upper chamber of the bladder, and a lower piston, which forms a lower chamber of the bladder. Be provided with the through-hole between epicoele and the cavity of resorption, realize gaseous circulation through the through-hole, moreover, as a embodiment, the cavity of resorption is divided into three subchamber, and three subchamber is actually two air chambers, and both sides air chamber are communicating, realizes gaseous circulation through the through-hole with middle subchamber.
As shown in fig. 3, with respect to the orientation shown in fig. 3, there are included a left front airbag 6, a left rear airbag 7, a right front airbag 1, and a right rear airbag 8. The upper cavity of the front left airbag 6 is connected with the lower cavity of the front right airbag 1 through a first connecting pipeline, the lower cavity of the front right airbag 1 is connected with the upper cavity of the rear right airbag 8 through a second connecting pipeline, the upper cavity of the rear right airbag 8 is connected with the lower cavity of the rear left airbag 7 through a third connecting pipeline, the lower cavity of the rear left airbag 7 is connected with the upper cavity of the front left airbag 6 through a fourth connecting pipeline, and the first connecting pipeline, the second connecting pipeline, the third connecting pipeline and the fourth connecting pipeline form a first main connecting pipeline 3. The lower cavity of the left front airbag 6 is connected with the upper cavity of the right front airbag 1 through a fifth connecting pipeline, the upper cavity of the right front airbag 1 is connected with the lower cavity of the right rear airbag 8 through a sixth connecting relation, the lower cavity of the right rear airbag 8 is connected with the upper cavity of the left rear airbag 7 through a seventh connecting pipeline, the upper cavity of the left rear airbag 7 is connected with the lower cavity of the left front airbag 6 through an eighth connecting pipeline, and the fifth connecting pipeline, the sixth connecting pipeline, the seventh connecting pipeline and the eighth connecting pipeline form a second main connecting pipeline 9. The connecting pipelines are provided with electromagnetic valves 2. In order to realize suspension control, the interconnected vehicle suspension system further comprises a control module (namely the controller 4 in fig. 3), a steering detection module and a brake signal detection module, wherein a sampling signal input end of the controller 4 is connected with the steering detection module and the brake signal detection module, a control signal output end of the controller 4 is connected with each electromagnetic valve 2, and the controller 4 controls the electromagnetic valves 2 according to received steering signals and brake signals. The brake signal detection module is used for detecting a brake signal of the vehicle, for example, acquiring the brake signal of the vehicle by detecting an opening degree signal of a brake pedal, and specifically comprises: and when the opening value of the brake pedal is larger than the set opening value, judging that the vehicle adopts effective braking. Further, it is also possible to determine whether the vehicle is braked by the following vehicle speed signal.
Further, in order to add a vehicle speed signal during control, the interconnected vehicle suspension system further comprises a vehicle speed detection module, wherein a sampling signal input end of the controller 4 is connected with the vehicle speed detection module to receive the vehicle speed signal, and the acceleration state of the vehicle can be detected according to the vehicle speed signal, such as: the vehicle speed change condition within a certain time period can be detected according to the vehicle speed signal, and the acceleration signal of the vehicle can be calculated according to the vehicle speed change condition and the corresponding time period.
In order to further improve the detection reliability of the steering signal, the steering detection module comprises a steering wheel corner detection module and a lateral acceleration detection module, the steering wheel corner detection module is installed on a steering column of a steering wheel and used for collecting steering wheel corner signals and angular velocity signals, the lateral acceleration detection module can be an acceleration sensor or a gyroscope and used for collecting the lateral acceleration of a vehicle, and the controller 4 can judge the state of the vehicle body more accurately and rapidly by collecting more vehicle body information.
In addition, the interconnected vehicle suspension system further comprises status indicator lamps 5 corresponding to the statuses of the solenoid valves 2, the control signal output end of the controller 4 is connected with the status indicator lamps 5, and the number of the status indicator lamps 5 can be only one, can also be equal to the number of the solenoid valves 2, and is corresponding to each solenoid valve 2.
The control idea of the interconnected vehicle suspension system is as follows: the communication relation between each gasbag is controlled according to different running states, the adaptability of the vehicle to different road conditions is enhanced, sufficient roll stability can be provided when bending, braking or overtaking is guaranteed, the safety is guaranteed, excitation of different frequencies from the road surface can be isolated in the normal driving process of the vehicle, vibration is attenuated, good riding comfort is provided, and good riding comfort is guaranteed while the operation stability is considered. The specific control process is as follows:
when the vehicle runs normally, the vehicle is indicated to have no other operation affecting normal running, such as: steering wheel corner detection module, lateral acceleration and brake signal detection module all do not detect effectual signal, it does not turn to or brake to synthesize the judgement vehicle, the vehicle is in the straight line operating mode (for example the vehicle keeps going straight line fast), the driver is not high to the control performance requirement of vehicle this moment, the comfortable performance of vehicle is more concerned with to the driver, then, controller 4 controls each solenoid valve 2 and opens, the upper and lower chamber of four gasbags all around the intercommunication for the effective volume increase of gasbag, reduce gasbag dynamic stiffness, promote the vehicle and take the travelling comfort, moreover, the "on" state of status indicator lamp 5 is lighted. And, in the normal driving process of the vehicle, detect the turn signal and the brake signal of the vehicle in real time, when detecting that the vehicle turns to, for example: when the vehicle emergently changes lanes or runs on a curve, the vehicle has better control performance to improve the driving safety, then the controller 4 controls the electromagnetic valves 2 to be closed, the connection among the air bags is disconnected, the effective volume of the air bags is reduced, the dynamic stiffness of the air bags is improved, the control performance of the vehicle is improved, and the off state of the state indicator lamp 5 is lightened; when detecting the vehicle brake, for example, the vehicle emergency brake appears, the vehicle can appear dive motion, left front gasbag 6 and right front gasbag 1 receive the compression this moment, left back gasbag 7 and right back gasbag 8 receive the extension, controller 4 sends control command for solenoid valve 2 according to the brake signal that receives, close solenoid valve 2, disconnection between each gasbag for the effective volume of gasbag reduces, gasbag dynamic stiffness obtains improving, thereby the dive motion of vehicle has been suppressed, riding comfort and stationarity have been guaranteed, and, the "off" state of status indicator lamp 5 is lighted.
Further, in the normal running process of the vehicle, an acceleration signal of the vehicle is also detected, when the acceleration signal of the vehicle is detected to be larger than a set acceleration threshold value, the vehicle is indicated to overtake, at the moment, the vehicle has better control performance so as to improve the driving safety, then, the controller 4 controls the electromagnetic valves 2 to be closed, and all the air bags are disconnected, so that the effective volume of the air bags is reduced, the dynamic stiffness of the air bags is improved, the control performance of the vehicle is improved, and the off state of the state indicator lamp 5 is lightened.
When the vehicle speed of the vehicle is detected to be 0, namely the vehicle is parked, for example, the vehicle is in a parking state, the requirement of a driver on the operation performance of the vehicle is not high, the driver pays more attention to the comfort performance of the vehicle, then, the controller 4 controls the electromagnetic valves 2 to be opened to communicate the upper cavity and the lower cavity of the four air bags, so that the effective volume of the air bags is increased, the dynamic stiffness of the air bags is reduced, the riding comfort of the vehicle is improved, and the on state of the state indicator lamp 5 is lightened.
In addition, when faults such as air leakage and the like occur to the air bags, the controller 4 controls the electromagnetic valves 2 to be closed, the connection among the air bags is disconnected, the air bags normally function, failure cannot be caused, and the reliability is improved.
The first main connecting pipeline 3 and the second main connecting pipeline 9 are larger in diameter of the air path as well as better in principle, according to the aerodynamic theory, when the air flows through the small hole, the through-flow capacity of the air is influenced by a plurality of factors such as pressure difference, flow velocity, shape and size of the throttle hole, and under the same excitation frequency and smaller throttle hole diameter, the air is more likely to be choked at the throttle hole, so the dynamic stiffness of the spring is relatively higher; the relatively smaller hole, the higher frequency that the air current is obstructed at the bigger orifice mouth so that the choking takes place needs, so the effective action frequency interval that the throttle aperture increases is also higher; when the orifice is large enough, the orifice has no blocking effect on the gas flowing through at the maximum test frequency, the gas can be completely exchanged, and the dynamic stiffness of the spring is minimum. Therefore, when the diameter of the air pipeline is larger, the dynamic stiffness of the whole vehicle is changed more obviously under the two states of opening and closing the electromagnetic valve 2.
Therefore, the controller 4 comprehensively judges the current working condition through the vehicle speed, the steering wheel angle signal, the brake signal and the like, automatically controls the on-off of the electromagnetic valve 2, realizes the free switching of the dynamic stiffness of the air bag, gives consideration to the comfort and the operation stability of the vehicle under different road conditions, ensures that the high-speed lane changing stability is better, the driving stability of a curve is higher, and gives consideration to the comfort and the operation stability. In addition, an auxiliary air chamber is omitted, the total layout space of the chassis is increased, reasonable layout of other parts is guaranteed, the dynamic stiffness of the air bag is effectively reduced, the riding comfort of the vehicle is improved, the problem of contradiction between the layout spaces of the auxiliary air chamber and the chassis is solved, and the riding comfort of the vehicle is greatly improved while the effective layout of other parts of the chassis is guaranteed. The air bag has large bearing capacity, can be used for large buses or load buses, and has wider application vehicle types.
The specific embodiments are given above, but the present invention is not limited to the described embodiments. The basic idea of the invention lies in the structure of the interconnected vehicle suspension system and the control method based on the system. Moreover, the interconnected vehicle suspension system is not limited to the above control method, and other related control methods are also available, so that the protection of the system is mainly focused on the hardware structure of the air bag, the solenoid valve and the connecting pipeline shown in fig. 3, and is not limited to related control parts, such as a control module and other signal detection modules. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
Interconnected vehicle suspension system embodiments:
the present embodiment provides an interconnected vehicle suspension system, and since the system has been described in detail in the vehicle embodiments described above, the present embodiment will not be described in detail.
The embodiment of the control method comprises the following steps:
the present embodiment provides a control method based on an interconnected vehicle suspension system, and since the control method has been described in detail in the vehicle embodiments above, the present embodiment will not be described in detail.
Claims (10)
1. An interconnected vehicle suspension system is characterized by comprising a left front airbag, a left rear airbag, a right front airbag and a right rear airbag, wherein each airbag comprises an upper airbag body and a lower piston, an upper cavity of the airbag is formed in the upper airbag body, a lower cavity of the airbag is formed in the lower piston, the upper cavity of the left front airbag is connected with the lower cavity of the right front airbag through a first connecting pipeline, the lower cavity of the right front airbag is connected with the upper cavity of the right rear airbag through a second connecting pipeline, the upper cavity of the right rear airbag is connected with the lower cavity of the left rear airbag through a third connecting pipeline, and the lower cavity of the left rear airbag is connected with the upper cavity of the left front airbag through a fourth connecting pipeline; the lower cavity of the left front airbag is connected with the upper cavity of the right front airbag through a fifth connecting pipeline, the upper cavity of the right front airbag is connected with the lower cavity of the right rear airbag through a sixth connecting relation, the lower cavity of the right rear airbag is connected with the upper cavity of the left rear airbag through a seventh connecting pipeline, the upper cavity of the left rear airbag is connected with the lower cavity of the left front airbag through an eighth connecting pipeline, and each connecting pipeline is provided with a control valve; the interconnected vehicle suspension system further comprises a control module, a steering detection module and a brake signal detection module, wherein the sampling signal input end of the control module is connected with the steering detection module and the brake signal detection module, and the control signal output end of the control module is connected with each control valve.
2. The interconnected vehicle suspension system of claim 1, wherein the steering detection module includes a steering wheel angle detection module and a lateral acceleration detection module.
3. The interconnected vehicle suspension system of claim 1, further comprising a vehicle speed detection module, wherein a sampled signal input of the control module is connected to the vehicle speed detection module.
4. The interconnected vehicle suspension system of claim 1, 2 or 3, further comprising status indicators corresponding to the status of each control valve, the status indicators being connected to the control signal output of the control module.
5. A vehicle comprises a vehicle body and an interconnected vehicle suspension system, and is characterized in that the interconnected vehicle suspension system comprises a left front airbag, a left rear airbag, a right front airbag and a right rear airbag, each airbag comprises an upper airbag body and a lower piston, an upper cavity of the airbag is formed inside the upper airbag body, a lower cavity of the airbag is formed inside the lower piston, the upper cavity of the left front airbag is connected with the lower cavity of the right front airbag through a first connecting pipeline, the lower cavity of the right front airbag is connected with the upper cavity of the right rear airbag through a second connecting pipeline, the upper cavity of the right rear airbag is connected with the lower cavity of the left rear airbag through a third connecting pipeline, and the lower cavity of the left rear airbag is connected with the upper cavity of the left front airbag through a fourth connecting pipeline; the lower cavity of the left front airbag is connected with the upper cavity of the right front airbag through a fifth connecting pipeline, the upper cavity of the right front airbag is connected with the lower cavity of the right rear airbag through a sixth connecting relation, the lower cavity of the right rear airbag is connected with the upper cavity of the left rear airbag through a seventh connecting pipeline, the upper cavity of the left rear airbag is connected with the lower cavity of the left front airbag through an eighth connecting pipeline, and each connecting pipeline is provided with a control valve; the interconnected vehicle suspension system further comprises a control module, a steering detection module and a brake signal detection module, wherein the sampling signal input end of the control module is connected with the steering detection module and the brake signal detection module, and the control signal output end of the control module is connected with each control valve.
6. The vehicle of claim 5, characterized in that the steering detection module comprises a steering wheel angle detection module and a lateral acceleration detection module.
7. The vehicle of claim 5, characterized in that the interconnected vehicle suspension system further comprises a vehicle speed detection module, and the sampled signal input of the control module is connected to the vehicle speed detection module.
8. A control method specially used for the interconnected vehicle suspension system of claim 1, characterized in that, during the normal running of the vehicle, each control valve is controlled to be opened, and the related signals of the vehicle are detected in real time, wherein the related signals of the vehicle comprise a steering signal and a braking signal, and when the steering or braking of the vehicle is detected, each control valve is controlled to be closed.
9. The control method of claim 8, wherein the vehicle related signal further comprises a vehicle acceleration signal, and wherein each control valve is controlled to close when the vehicle acceleration signal is detected to be greater than a set acceleration threshold.
10. The control method according to claim 8 or 9, characterized in that each control valve is controlled to be opened when the vehicle speed of the vehicle is 0.
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| CN201910647454.0A CN112238721B (en) | 2019-07-17 | 2019-07-17 | Vehicle, interconnection type vehicle suspension system and control method thereof |
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| CN109501545A (en) * | 2018-10-31 | 2019-03-22 | 江苏大学 | A kind of air suspension and the vehicle and method for installing the suspension |
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| US20100044976A1 (en) * | 2008-08-20 | 2010-02-25 | Matthew James Rades | Vehicle suspension with selectable roll stabilization |
| CN104786772A (en) * | 2015-04-16 | 2015-07-22 | 湖南工学院 | Interlinked air suspension control device, system and method |
| CN105857007A (en) * | 2016-04-05 | 2016-08-17 | 江苏大学 | Combined type interconnected air suspension and interconnection mode control method thereof |
| CN107953736A (en) * | 2016-10-14 | 2018-04-24 | 郑州宇通客车股份有限公司 | A kind of vehicle and its suspension interconnection type air bump module and air bump |
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