CN115257273A - Suspension system control method and device and suspension system - Google Patents
Suspension system control method and device and suspension system Download PDFInfo
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- CN115257273A CN115257273A CN202210771214.3A CN202210771214A CN115257273A CN 115257273 A CN115257273 A CN 115257273A CN 202210771214 A CN202210771214 A CN 202210771214A CN 115257273 A CN115257273 A CN 115257273A
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- 239000000725 suspension Substances 0.000 title claims abstract description 157
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000001276 controlling effect Effects 0.000 claims abstract description 40
- 230000001133 acceleration Effects 0.000 claims abstract description 36
- 230000000875 corresponding effect Effects 0.000 claims abstract description 15
- 239000006096 absorbing agent Substances 0.000 claims description 26
- 230000035939 shock Effects 0.000 claims description 25
- 238000013016 damping Methods 0.000 claims description 20
- 230000002452 interceptive effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 8
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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
- B60G17/01908—Acceleration or inclination 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
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/052—Pneumatic spring characteristics
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/20—Stationary vehicle
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The embodiment of the invention discloses a suspension system control method, a suspension system control device and a suspension system, wherein the control method comprises the steps of obtaining the current running parameters of a vehicle to be controlled, wherein the current running parameters comprise one or more of the following parameters: the vehicle body height, the current vehicle speed, the current acceleration, the steering angle, the steering direction and the braking state; judging the current running state of the vehicle to be controlled based on the current running parameters; and controlling a suspension system of the vehicle to be controlled to execute corresponding actions based on the current running state. The suspension system adjusts the adjusting range that leads to according to the road surface load that the vehicle received among the prior art is limited, and the user's the experience of taking feels relatively poor, the lower technical problem of comfort level, has realized improving suspension system's adjustability, and then improves user's the technical effect of taking the travelling comfort.
Description
Technical Field
The embodiment of the invention relates to the technical field of control of suspension systems, in particular to a method, a device and equipment for controlling a suspension system.
Background
The automotive suspension is a general term for an elastic coupling device between an automobile body and wheels, and has great influence on the running stability, smoothness and comfort of an automobile. The passive suspension adopted by the traditional automobile cannot meet the requirement of people on comfort under various road conditions due to the non-adjustability of the passive suspension, and the active suspension is favored by people due to the characteristic of adjustability of the active suspension.
However, in the control process of the active suspension at the present stage, the road load is usually input into a preset adjusting system according to the road load that the wheel has received to adjust the damping magnitude of the active suspension, and this adjusting method has a high modeling cost and a limited adjusting range, and cannot cope with a road surface with a large mutation, so that the ride experience of the suspension system during operation is poor, and the comfort level is low.
Disclosure of Invention
The embodiment of the invention provides a suspension system control method and device and a suspension system, and solves the technical problems that in the prior art, the suspension system is limited in adjustment range, poor in riding experience of a user and low in comfort degree due to the fact that the suspension system is adjusted only according to road loads borne by a vehicle.
The embodiment of the invention provides a control method of a suspension system, which comprises the following steps:
acquiring current driving parameters of a vehicle to be controlled, wherein the current driving parameters comprise one or more of the following parameters: the vehicle body height, the current vehicle speed, the current acceleration, the steering angle, the steering direction and the braking state;
judging the current running state of the vehicle to be controlled based on the current running parameters;
and controlling a suspension system of the vehicle to be controlled to execute corresponding actions based on the current running state.
Further, the obtaining of the current driving parameters of the vehicle to be controlled includes:
and acquiring the current running parameters of the vehicle to be controlled through an interactive signal module and a suspension sensor module.
Further, the judging the current driving state of the vehicle to be controlled based on the current driving parameters comprises:
when the current driving parameters are the vehicle body height and the steering angle, determining the steering direction of the vehicle to be controlled based on the vehicle body height and the steering angle;
when the current running parameters are the vehicle body height and the braking state, determining that the running state of the vehicle to be controlled is acceleration or braking based on the vehicle body height and the braking state;
and when the current driving parameter is the current acceleration, determining the current driving road condition of the vehicle to be controlled based on the current acceleration.
Further, when the current running state of the vehicle to be controlled is steering, controlling a suspension system of the vehicle to be controlled to perform corresponding actions based on the current running state comprises:
controlling a damping value of an inner side shock absorber in the suspension system to increase by a first preset value and controlling an inner side air spring in the suspension system to inflate a first air quantity based on the steering direction and the steering angle of the vehicle to be controlled, wherein the inner side refers to one side of the vehicle to be controlled which is steered.
Further, when the current running state of the vehicle to be controlled is acceleration, controlling a suspension system of the vehicle to be controlled to perform corresponding actions based on the current running state comprises:
and controlling the damping value of a shock absorber of a rear suspension in the suspension system to increase by a second preset value and controlling an air spring of the rear suspension in the suspension system to inflate by a second air quantity based on the current speed of the vehicle to be controlled.
Further, when the current running state of the vehicle to be controlled is braking, controlling a suspension system of the vehicle to be controlled to execute corresponding actions based on the current running state comprises the following steps:
and controlling the damping value of a shock absorber of a front suspension in the suspension system to increase by a third preset value and controlling the air spring of the front suspension in the suspension system to inflate by a third air quantity based on the current speed of the vehicle to be controlled.
Further, when the current driving road condition of the vehicle to be controlled is an uneven road condition and the current vehicle speed is less than a preset vehicle speed value, determining the current driving state of the vehicle to be controlled based on the current driving parameters includes:
and controlling each shock absorber in the suspension system to increase a fourth preset value and controlling each air spring in the suspension system to deflate a fourth air quantity based on the current driving road condition.
An embodiment of the present invention further provides a control device of a suspension system, where the control device includes:
the sensor unit is used for acquiring the current driving parameters of the vehicle to be controlled, wherein the current driving parameters comprise one or more of the following parameters: the vehicle body height, the current vehicle speed, the current acceleration, the steering angle, the steering direction and the braking state;
the state judging unit is used for judging the current running state of the vehicle to be controlled based on the current running parameters;
and the control unit is used for controlling a suspension system of the vehicle to be controlled to execute corresponding actions based on the current running state.
Further, the sensor unit comprises a suspension sensor module and an interaction signal module;
the suspension sensor module comprises an acceleration sensor module and a vehicle body height sensor module;
the interactive signal module comprises an ignition switch signal module, an accelerator pedal position sensor module, a brake pedal position sensor module, a vehicle speed sensor module and a steering wheel corner sensor module.
Embodiments of the present invention further provide a suspension system, where the suspension system includes a control device of the suspension system described in any of the above embodiments.
The embodiment of the invention discloses a suspension system and a control method and device thereof, wherein the control method comprises the steps of obtaining the current running parameters of a vehicle to be controlled, wherein the current running parameters comprise one or more of the following parameters: the vehicle body height, the current vehicle speed, the current acceleration, the steering angle, the steering direction and the braking state; judging the current running state of the vehicle to be controlled based on the current running parameters; and controlling a suspension system of the vehicle to be controlled to execute corresponding actions based on the current running state. This application is through the multiple current parameter of traveling of acquireing the vehicle of treating accuse to the current state of traveling of the vehicle of treating accuse is confirmed according to the parameter of traveling of difference, and adjust suspension system based on current state of traveling, it is limited only according to the road surface load that the vehicle received to adjust the control range that leads to have solved among the prior art suspension system, user's the experience of taking is relatively poor, the lower technical problem of comfort level, the adjustability that has realized improving suspension system, and then the technical effect of improvement user's the travelling comfort of taking.
Drawings
FIG. 1 is a flow chart of a method of controlling a suspension system according to an embodiment of the present invention;
fig. 2 is a structural view of a control device of a suspension system according to an embodiment of the present invention;
fig. 3 is a structural diagram of a control device of another suspension system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and the drawings are used for distinguishing different objects, and are not used for limiting a specific order. The following embodiments of the present invention may be implemented individually, or in combination with each other, and the embodiments of the present invention are not limited in this respect.
Fig. 1 is a flowchart of a control method of a suspension system according to an embodiment of the present invention. The control method of the suspension system can be applied to all vehicles needing to be provided with the electronic control suspension system.
As shown in fig. 1, the control method of the suspension system specifically includes the following steps:
s101, obtaining current running parameters of a vehicle to be controlled, wherein the current running parameters comprise one or more of the following parameters: vehicle body height, current vehicle speed, current acceleration, steering angle, steering direction, and braking status.
Specifically, for the Control method of the suspension system, the Control process includes a manual mode and an automatic mode, and in the automatic mode, an ECU (Electronic Control Unit) of the vehicle to be controlled monitors the driving state parameters of the vehicle to be controlled in real time, and obtains the current driving parameters of the vehicle to be controlled. Specifically, the vehicle height of the vehicle to be controlled can be acquired by using the vehicle height sensor module, the current vehicle speed of the vehicle to be controlled is acquired by using the vehicle speed sensor module, the current acceleration of the vehicle to be controlled is acquired by using the acceleration sensor module, the steering angle and the steering direction of the vehicle to be controlled are acquired by using the steering wheel angle sensor, and the braking state of the vehicle to be controlled is acquired by using the acceleration pedal position sensor module and the brake pedal position sensor module.
And S102, judging the current running state of the vehicle to be controlled based on the current running parameters.
Specifically, after the current driving parameter of the vehicle to be controlled is obtained, the current driving state of the vehicle to be controlled is determined according to the current driving parameter, where the current driving state of the vehicle to be controlled includes, but is not limited to, one of the following: an acceleration state, a braking state, a steering state, a running surface irregularity state, and the like.
And S103, controlling a suspension system of the vehicle to be controlled to execute corresponding actions based on the current running state.
Specifically, the actuating mechanism of the suspension system of the vehicle to be controlled comprises four shock absorbers and four air springs in the suspension system, wherein the four shock absorbers and the four air springs are respectively arranged at four tires of the vehicle to be controlled. After the current running state of the vehicle to be controlled is determined, the damping values of one or more of the four vibration absorbers are adjusted in an increasing or decreasing mode according to the current running state, the air inflation amount of the air spring is adjusted in an increasing or decreasing mode according to the current running state, the suspension system is adjusted, and the riding comfort of a user is improved.
This application is through the multiple current parameter of traveling of acquireing the vehicle of treating accuse to the current state of traveling of the vehicle of treating accuse is confirmed according to the parameter of traveling of difference, and adjust suspension system based on current state of traveling, it is limited only according to the road surface load that the vehicle received to adjust the control range that leads to have solved among the prior art suspension system, user's the experience of taking is relatively poor, the lower technical problem of comfort level, the adjustability that has realized improving suspension system, and then the technical effect of improvement user's the travelling comfort of taking.
Fig. 2 is a structural diagram of a control device of a suspension system according to an embodiment of the present invention.
Optionally, in S101, the obtaining the current driving parameter of the vehicle to be controlled includes: and acquiring the current running parameters of the vehicle to be controlled through the interactive signal module and the suspension sensor module.
Specifically, as shown in fig. 2, the control device of the suspension system includes a sensor unit 1, where the sensor unit 1 interacts with a signal module 10 and a suspension sensor module 11, and specifically, the interaction signal module 10 includes an ignition switch signal module 101, an accelerator pedal position sensor module 102, a brake pedal position sensor module 103, a vehicle speed sensor module 104 and a steering wheel angle sensor module 105, and is respectively configured to determine whether a vehicle to be controlled is currently started, determine whether a current braking state of the vehicle to be controlled is accelerating or braking, and acquire a current vehicle speed, a steering angle and a steering direction of the vehicle to be controlled; the suspension sensor module 11 includes an acceleration sensor module 111 and a vehicle height sensor module 112, which are respectively used for acquiring the current acceleration and the vehicle height of the vehicle to be controlled.
On the basis of the above technical solutions, S102 specifically includes:
when the current driving parameters are the vehicle body height and the steering angle, determining the steering direction of the vehicle to be controlled based on the vehicle body height and the steering angle;
when the current running parameters are the height of the vehicle body and the braking state, determining the running state of the vehicle to be controlled to be acceleration or braking based on the height of the vehicle body and the braking state;
and when the current driving parameter is the current acceleration, determining the current driving road condition of the vehicle to be controlled based on the current acceleration.
Specifically, after the current driving parameters of the vehicle to be controlled are obtained, the current driving state of the vehicle to be controlled can be further determined according to the type of the obtained current driving parameters, for example, if the vehicle to be controlled is currently driving at a constant speed, the vehicle to be controlled does not generate a braking state signal or a steering signal, therefore, the obtained current driving parameters are mostly the height of the vehicle body and the current acceleration, then, whether the current driving road condition of the vehicle to be controlled is an uneven road surface or a flat road surface is judged according to the current acceleration, and then, the suspension system is adjusted according to the current driving road condition.
The vehicle body height is used for judging the current position of a suspension system of a vehicle to be controlled, and can be divided into three position states as an example: the first is a normal height position state, at which the target height is 0mm; the second is a low-position state of the automobile body, the target height is-25 mm at the moment, namely the target height is 25mm lower than the normal height position, and the low-position state is adopted to reduce air resistance when the automobile runs at high speed generally; the third is a high state of the vehicle body, the target height is +25mm at the moment, namely the target height is 25mm higher than the normal height position, and the low state is adopted to improve the trafficability of the vehicle when the vehicle runs on an uneven road surface at a low speed.
On the basis of the above technical solutions, when the current driving state of the vehicle to be controlled is steering, S103 specifically includes: and controlling the damping value of an inner side shock absorber in the suspension system to increase by a first preset value and controlling an inner side air spring in the suspension system to inflate by a first air quantity on the basis of the steering direction and the steering angle of the vehicle to be controlled, wherein the inner side refers to the side of the vehicle to be controlled which is steered.
Specifically, when the obtained current driving parameters of the vehicle to be controlled are a steering direction and a steering angle, it is indicated that the vehicle to be controlled is steering, and in order to reduce a roll angle of the vehicle to be controlled during steering, a damping value of a shock absorber on a steering side (i.e., an inner side) of the vehicle to be controlled in a suspension system needs to be controlled to increase by a first preset value, and a first air volume is appropriately inflated into an air spring on the same side, so as to keep a vehicle body of the vehicle to be controlled horizontal. It should be noted that the first preset value and the first air quantity are determined according to the steering direction and the steering angle of the vehicle to be controlled, and the determination of the values can enable the shock absorber and the air spring to keep the body of the vehicle to be controlled relatively horizontal when the vehicle to be controlled turns, so that the roll angle is reduced.
On the basis of the above technical solutions, when the current driving state of the vehicle to be controlled is acceleration, S103 specifically includes: and controlling the damping value of a shock absorber of the rear suspension in the suspension system to increase by a second preset value and controlling an air spring of the rear suspension in the suspension system to inflate by a second air quantity based on the current speed of the vehicle to be controlled.
Specifically, when the acquired current running parameter of the vehicle to be controlled is a signal transmitted from the accelerator pedal position sensor module, indicating that the vehicle to be controlled is accelerating, in order to suppress a phenomenon of "head up", that is, a phenomenon of "back up", of the vehicle body when the vehicle to be controlled is accelerating, it is necessary to control a damping value of a shock absorber of a rear suspension of the vehicle to be controlled in a suspension system to increase by a second preset value, and appropriately inflate a second air amount to an air spring of the rear suspension, so as to maintain the vehicle body level of the vehicle to be controlled. It should be noted that the second preset value and the second air volume are determined according to a backward tilt value of the vehicle to be controlled, which may be caused by the current speed of the vehicle to be controlled, and the current height of the vehicle body, and the values are determined so that when the vehicle to be controlled accelerates, the shock absorber and the air spring can keep the vehicle body of the vehicle to be controlled relatively horizontal, thereby improving the safety and comfort of the vehicle to be controlled.
On the basis of the above technical solutions, when the current driving state of the vehicle to be controlled is braking, S103 specifically includes: and controlling the damping value of a shock absorber of a front suspension in the suspension system to increase by a third preset value and controlling an air spring of the front suspension in the suspension system to inflate by a third air quantity based on the current speed of the vehicle to be controlled.
Specifically, when the acquired current running parameter of the vehicle to be controlled is a signal transmitted by the brake pedal position sensor module, it indicates that the vehicle to be controlled is braking, and in order to suppress the "nodding" phenomenon of the vehicle body when the vehicle to be controlled accelerates, it is necessary to control the damping value of the shock absorber of the front suspension of the vehicle to be controlled in the suspension system to increase by a third preset value, and appropriately inflate a third air quantity to the air spring of the front suspension, so as to maintain the vehicle body level of the vehicle to be controlled. It should be noted that the third preset value and the third air amount are determined according to the current vehicle speed of the vehicle to be controlled and the current vehicle height, and the values are determined so that when the vehicle to be controlled brakes, the shock absorber and the air spring can keep the vehicle body of the vehicle to be controlled relatively horizontal, and the safety and comfort of the vehicle to be controlled are improved.
On the basis of the above technical solutions, when the current driving road condition of the vehicle to be controlled is an uneven road condition, and the current vehicle speed is less than the preset vehicle speed value, S103 specifically includes: and controlling each shock absorber in the suspension system to increase a fourth preset value and controlling each air spring in the suspension system to deflate a fourth air quantity based on the current running road condition.
Specifically, when the obtained current driving parameters of the vehicle to be controlled are an acceleration signal transmitted from an acceleration sensor module and a current vehicle speed transmitted from a vehicle speed sensor, it can be judged through the acceleration signal that the tire is raised or depressed at the moment, that is, the current vehicle to be controlled is driven on an uneven road surface, and further judged whether the current vehicle speed of the vehicle to be controlled is less than a preset vehicle speed value, if so, it is indicated that the vehicle to be controlled is in a low-speed driving state, and the driving road condition is an uneven road surface. It should be noted that the fourth preset value and the fourth air volume are determined according to the current speed of the vehicle to be controlled and the unevenness degree of the road surface, and the determination of the values can enable the shock absorber and the air spring to keep the body of the vehicle to be controlled relatively horizontal when the vehicle to be controlled runs on the uneven road surface at a low speed, so as to improve the safety and comfort of the vehicle to be controlled.
An embodiment of the present invention further provides a control device of a suspension system, as shown in fig. 2, the control device of the suspension system includes:
the sensor unit 1 is configured to acquire a current driving parameter of a vehicle to be controlled, where the current driving parameter includes one or more of the following: the vehicle body height, the current vehicle speed, the current acceleration, the steering angle, the steering direction and the braking state;
the state judging unit 2 is used for judging the current running state of the vehicle to be controlled based on the current running parameters;
and the control unit 3 is used for controlling a suspension system of the vehicle to be controlled to execute corresponding actions based on the current running state.
Specifically, as shown in fig. 2, the sensor unit 1 and the state determination unit 2 are electrically connected to the control unit 3, respectively, and the sensor unit 1 is electrically connected to the state determination unit 2.
Alternatively, as shown in fig. 2, the sensor unit 1 includes a suspension sensor module 11 and an interactive signal module 10;
the suspension sensor module 11 includes an acceleration sensor module 111 and a vehicle height sensor module 112;
the interactive signal module 10 includes an ignition switch signal module 101, an accelerator pedal position sensor module 102, a brake pedal position sensor module 103, a vehicle speed sensor module 104, and a steering wheel angle sensor module 105.
Specifically, the acceleration sensor module 111 may acquire a vertical vibration acceleration of the vehicle body, and may also detect a pitching vibration condition when the vehicle to be controlled is braked or accelerated and a rolling rotation condition when the vehicle is turned; the body height sensor module 112 determines the height condition of each position of the body by measuring the distance between the suspension arm and the body in the suspension system;
fig. 3 is a structural view of another control device of a suspension system according to an embodiment of the present invention.
Optionally, as shown in fig. 3, the state determining unit 2 includes a state displaying module 21, configured to display, to a driver of the vehicle to be controlled, a current control state of a suspension system of the vehicle to be controlled, which includes a current damping value of each shock absorber in the suspension system and a current inflation amount of each air spring.
Alternatively, as shown in fig. 3, the control unit 3 includes a suspension damping control module 31 and a body height control module 32.
Specifically, a suspension damping control module 31 and a vehicle height control module 32 are arranged inside the control unit 3, and the suspension damping control module 31 is used for realizing the improvement of the vehicle body stability of the vehicle to be controlled through the control of a shock absorber and an air spring of a suspension system of the vehicle to be controlled. Specifically, the suspension damping control module 31 can make the stiffness characteristics of the air spring equivalent through linear approximation within a specified vehicle height variation range, and realize suppression of vehicle body vibration disturbance in the full-operating mode through the adjustment function of a damping shock absorber of a suspension system.
The body height control module 32 sets the body height to three height modes, i.e., a normal height position state, a low body position state, and a high body position state. If the height of the vehicle body deviates from the calibrated tolerance range due to some interference factors, such as load change of the vehicle to be controlled, the control unit 3 drives and adjusts the charging and discharging electromagnetic valves of the suspension system, so that the height of the vehicle body quickly approaches the set value.
The adaptability of the vehicle to be controlled to uneven road surfaces is enhanced by increasing the height of the vehicle body in bumpy road conditions; the air resistance is reduced and the economic benefit is improved by reducing the clearance between the chassis and the ground on a flat road surface. The height adjustment modes can be divided into two types: firstly, the modes are manually switched, in the actual situation, a sensor detects control command parameters input by a driver, and the vehicle height control module 32 adjusts among three height modes; and secondly, automatically switching modes, and automatically changing the mode of the height of the vehicle body by collecting and processing the height of the vehicle body, the current vehicle speed and the current road surface condition to judge the working condition.
Optionally, as shown in fig. 3, the control device of the suspension system further comprises a driver control module 4, and the driver control module 4 is electrically connected with the control unit 3.
Specifically, the driver control module 4 provides a fault alert to the driver. The control unit 3 can not only comprehensively analyze and process the signals, but also continuously monitor the working conditions and the component functions of each part in the suspension system. If the failure detection of the suspension system is enabled, the control of the air suspension and the control of the shock absorber are not completely shut down after the state evaluation of each component in the suspension. If it is found that a function of a certain component in the system is limited or damaged, part of the control activities in the control unit 3 may be limited, and if it is serious, the control activities in the control unit 3 may be completely stopped, and the position information of the damaged component is displayed in the state display module 21 of the state judgment unit 2, and a warning lamp is turned on to indicate a failure to the driver. When the fault is repaired, the warning lamp is turned off, and the control activity in the control unit 3 is recovered.
Optionally, as shown in fig. 3, the control device of the suspension system further includes a power access module 5, and the power access module 5 is electrically connected to the control unit 3 and is used for supplying power to the control device of the suspension system.
The device provided by the embodiment of the invention has the same implementation principle and technical effect as the method embodiment, and for the sake of brief description, the corresponding content in the method embodiment can be referred to where the device embodiment is not mentioned in part.
The control device of the suspension system provided by the embodiment of the invention has the same technical characteristics as the control method of the suspension system provided by the embodiment of the invention, so that the same technical problems can be solved, and the same technical effects can be achieved.
Embodiments of the present invention further provide a suspension system, which includes a control device of the suspension system in any of the above embodiments.
The suspension system provided by the embodiment of the present invention includes the control device of the suspension system in the above embodiment, and therefore, the suspension system provided by the embodiment of the present invention also has the beneficial effects described in the above embodiment, and details are not repeated herein.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. A control method of a suspension system, characterized by comprising:
acquiring current driving parameters of a vehicle to be controlled, wherein the current driving parameters comprise one or more of the following parameters: the vehicle body height, the current vehicle speed, the current acceleration, the steering angle, the steering direction and the braking state;
judging the current running state of the vehicle to be controlled based on the current running parameters;
and controlling a suspension system of the vehicle to be controlled to execute corresponding actions based on the current running state.
2. The control method of a suspension system according to claim 1, wherein acquiring the current running parameter of the vehicle to be controlled includes:
and acquiring the current running parameters of the vehicle to be controlled through an interactive signal module and a suspension sensor module.
3. The control method of a suspension system according to claim 1, wherein determining the current running state of the vehicle to be controlled based on the current running parameter includes:
when the current driving parameters are the vehicle body height and the steering angle, determining the steering direction of the vehicle to be controlled based on the vehicle body height and the steering angle;
when the current running parameters are the vehicle body height and the braking state, determining that the running state of the vehicle to be controlled is acceleration or braking based on the vehicle body height and the braking state;
and when the current driving parameter is the current acceleration, determining the current driving road condition of the vehicle to be controlled based on the current acceleration.
4. The control method of a suspension system according to claim 3, wherein when the current running state of the vehicle to be controlled is steering, controlling the suspension system of the vehicle to be controlled to perform a corresponding action based on the current running state comprises:
controlling the damping value of an inner side shock absorber in the suspension system to increase by a first preset value and controlling an inner side air spring in the suspension system to inflate by a first air quantity based on the steering direction and the steering angle of the vehicle to be controlled, wherein the inner side refers to the side of the vehicle to be controlled which is steered.
5. The control method of the suspension system according to claim 3, wherein when the current running state of the vehicle to be controlled is acceleration, controlling the suspension system of the vehicle to be controlled to perform the corresponding action based on the current running state comprises:
and controlling the damping value of a shock absorber of a rear suspension in the suspension system to increase by a second preset value and controlling an air spring of the rear suspension in the suspension system to inflate by a second air quantity based on the current speed of the vehicle to be controlled.
6. The control method of the suspension system according to claim 3, wherein when the current running state of the vehicle to be controlled is braking, controlling the suspension system of the vehicle to be controlled to perform the corresponding action based on the current running state comprises:
and controlling the damping value of a shock absorber of a front suspension in the suspension system to increase by a third preset value and controlling an air spring of the front suspension in the suspension system to inflate by a third air quantity based on the current speed of the vehicle to be controlled.
7. The control method of the suspension system according to claim 3, wherein when the current driving road condition of the vehicle to be controlled is an uneven road condition and the current vehicle speed is less than a preset vehicle speed value, determining the current driving state of the vehicle to be controlled based on the current driving parameters comprises:
and controlling each shock absorber in the suspension system to increase a fourth preset value and controlling each air spring in the suspension system to deflate a fourth air quantity based on the current driving road condition.
8. A control device of a suspension system, characterized by comprising:
the sensor unit is used for acquiring the current driving parameters of the vehicle to be controlled, wherein the current driving parameters comprise one or more of the following parameters: the vehicle body height, the current vehicle speed, the current acceleration, the steering angle, the steering direction and the braking state;
the state judging unit is used for judging the current running state of the vehicle to be controlled based on the current running parameters;
and the control unit is used for controlling a suspension system of the vehicle to be controlled to execute corresponding actions based on the current running state.
9. The control device of a suspension system according to claim 8, wherein the sensor unit comprises a suspension sensor module and a mutual signal module;
the suspension sensor module comprises an acceleration sensor module and a vehicle body height sensor module;
the interactive signal module comprises an ignition switch signal module, an accelerator pedal position sensor module, a brake pedal position sensor module, a vehicle speed sensor module and a steering wheel corner sensor module.
10. A suspension system comprising the control device of the suspension system according to any one of claims 8 to 9.
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| CN202210771214.3A CN115257273A (en) | 2022-06-30 | 2022-06-30 | Suspension system control method and device and suspension system |
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| CN202210771214.3A CN115257273A (en) | 2022-06-30 | 2022-06-30 | Suspension system control method and device and suspension system |
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| CN117656749A (en) * | 2023-04-25 | 2024-03-08 | 比亚迪股份有限公司 | Control method and system of active suspension and vehicle |
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