CN110001338B - A suspension system and method and vehicle - Google Patents
A suspension system and method and vehicle Download PDFInfo
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- CN110001338B CN110001338B CN201910205696.4A CN201910205696A CN110001338B CN 110001338 B CN110001338 B CN 110001338B CN 201910205696 A CN201910205696 A CN 201910205696A CN 110001338 B CN110001338 B CN 110001338B
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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
- B60G17/018—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 use of a specific signal treatment or control method
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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
- B60G17/0523—Regulating distributors or valves for pneumatic springs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/10—Acceleration; Deceleration
- B60G2400/106—Acceleration; Deceleration longitudinal with regard to vehicle, e.g. braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/20—Speed
- B60G2400/204—Vehicle speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/25—Stroke; Height; Displacement
- B60G2400/252—Stroke; Height; Displacement vertical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/50—Pressure
- B60G2400/52—Pressure in tyre
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
本发明提供一种悬架系统及方法与车辆，包括空气弹簧、供气装置、检测装置、执行装置和电子控制单元；空气弹簧用于改变车身高度；供气装置与空气弹簧连接；检测装置用于检测车胎气压；执行装置包括电磁阀和继动阀，继动阀分别与空气弹簧和供气装置连接；空气弹簧连接有电磁阀；电子控制单元分别与检测装置和执行装置连接，电子控制单元根据检测装置检测的车胎气压判断车胎是否爆胎，当车胎发生爆胎时，电子控制单元控制供气装置和继动阀给爆胎的空气弹簧充气，同时控制其余没有爆胎的空气弹簧的电磁阀打开进行放气，使车身高度迅速达到平衡状态，提升爆胎时车辆的安全性。
The invention provides a suspension system and method and a vehicle, comprising an air spring, an air supply device, a detection device, an execution device and an electronic control unit; the air spring is used for changing the height of the vehicle body; the air supply device is connected with the air spring; It is used to detect the tire air pressure; the execution device includes a solenoid valve and a relay valve, and the relay valve is respectively connected with the air spring and the air supply device; the air spring is connected with a solenoid valve; the electronic control unit is respectively connected with the detection device and the execution device, and the electronic control unit According to the tire pressure detected by the detection device, it is judged whether the tire is punctured. When the tire is punctured, the electronic control unit controls the air supply device and the relay valve to inflate the air spring of the punctured tire, and at the same time controls the electromagnetic solenoid of the other air springs that do not have a punctured tire. The valve is opened to deflate, so that the height of the vehicle body quickly reaches a balanced state, which improves the safety of the vehicle when the tire blows out.
Description
Technical Field
The invention belongs to the technical field of automobile suspensions, and particularly relates to a suspension system and method and a vehicle.
Background
When the vehicle is blown out, the possibility of the vehicle to roll or even turn over is greatly increased due to the reduction of the height of the vehicle body, so that the life safety of a driver is threatened. The vehicle equipped with the air suspension has the characteristic that the height of the vehicle body can be adjusted, but the response speed is low, so that the quick inflation at the moment of tire burst is realized by improving the response speed of a suspension system of the vehicle, the height of the vehicle body at the tire burst side is improved, and the safety of the vehicle is improved.
The application numbers are: 201310195724.1, the system comprises a tire pressure monitoring device, a tire burst braking device, a front sensing device and an active steering control device, when detecting that the vehicle has a tire burst, the front sensing device detects the obstacle in front of the vehicle and controls the vehicle to steer actively, thereby avoiding collision with the obstacle in front. According to the intelligent vehicle with the application number of 201810154435.X and the tire burst safety control method and system of the intelligent vehicle, when a tire burst happens to the vehicle, the tire burst vehicle is controlled and operated through collection of environmental information and vehicle states, and safety of the tire burst vehicle is guaranteed. The above inventions do not control the suspension system of the vehicle, and cannot ensure the balance of the height of the vehicle body and the roll stiffness when a tire burst occurs.
Disclosure of Invention
In order to solve the problems, the invention provides a suspension system and a method, when a vehicle is blown out, the wheel suspension with blown out tires is inflated, and the rest wheel suspensions without blown out tires release partial gas to quickly achieve the balance of the heights of the vehicle bodies on two sides, thereby improving the safety when the tires are blown out. When the vehicle has a tire burst, the air pressure of the tire is rapidly reduced, so that the height of the vehicle body on the side with the tire burst is reduced, and the vehicle is very easy to roll or even turn over due to the unbalance of the height of the vehicle body. The invention judges whether the current tire burst happens or not through the change rate of the tire pressure signal transmitted by the tire pressure monitoring device and the signal transmitted by the vehicle body height sensor, when the electronic control unit ECU judges that the current vehicle has the tire burst, the air suspension of the tire burst wheel is controlled to be inflated through the electromagnetic valve and the relay valve, meanwhile, the air suspension of the tire burst wheel is partially deflated through the tire burst wheel suspension, until the vehicle body height reaches the balance, and the electromagnetic valves and the relay valves on the two sides are closed.
The technical scheme adopted by the invention for solving the technical problems is as follows: a suspension system comprises
An air spring;
the air supply device is connected with the air spring;
the detection device is used for detecting the air pressure of the tire;
the actuating device comprises an electromagnetic valve and a relay valve, and the relay valve is respectively connected with the air spring and the air supply device; the air spring is connected with an electromagnetic valve;
and the electronic control unit is respectively connected with the detection device and the execution device, judges whether the tire is burst according to the tire air pressure detected by the detection device, controls the air supply device and the relay valve to charge the air spring with burst tire when the tire is burst, and simultaneously controls the electromagnetic valves of the rest air springs without burst tire to be opened for deflation.
In the above scheme, the air supply device comprises an air compressor and a high-pressure air storage tank;
in the above scheme, the electromagnetic valve includes a two-position two-way electromagnetic valve and a two-position three-way electromagnetic valve;
a two-position two-way electromagnetic valve and a two-position three-way electromagnetic valve are sequentially arranged on a pipeline for connecting the air spring with the air supply device;
the relay valve comprises an air inlet cavity A, a control cavity B and an air outlet cavity C; the air inlet cavity A of the relay valve is connected with a high-pressure air storage tank; the air outlet cavity C is connected with one end of a one-way valve, and the other end of the one-way valve is connected with an air spring; the control cavity B is connected with a two-position three-way electromagnetic valve;
when the two-position three-way electromagnetic valve is electrified, the air spring and the relay valve are respectively connected with the air compressor; when the two-position three-way electromagnetic valve is powered off, the air spring and the relay valve are respectively connected with the high-pressure air storage tank.
In the above scheme, the detection device further comprises a vehicle speed sensor and a vehicle height sensor;
the vehicle speed sensor is used for detecting whether the current vehicle is in a running state or a static state;
the vehicle body height sensor is used for detecting whether the vehicle body height is horizontal at the initial position.
In the scheme, the tire pressure monitoring device comprises a pressure sensor, an acceleration sensor, a Micro Control Unit (MCU) and a wireless transmitter;
the pressure sensor is used for detecting the air pressure of the tire;
the acceleration sensor is used for detecting the acceleration of the vehicle;
and the micro control unit MCU is used for receiving the sensor signal and transmitting the tire pressure signal to the electronic control unit through the wireless transmitter.
In the above scheme, the electronic control unit comprises an input module, a control module and an output module;
the input module receives an input signal of the detection device;
the control module judges whether the tire is burst according to the tire pressure detected by the detection device, when the tire bursts, the electronic control unit controls the air supply device and the relay valve to inflate the air springs with burst tires, and simultaneously controls the electromagnetic valves of the rest air springs without burst tires to open for deflation;
the output module is connected with the execution device and controls the operation of the execution device according to the output of the control module.
A vehicle comprises the suspension system.
A control method of a suspension system according to the above, comprising the steps of:
the detection device detects the air pressure of the tire;
the electronic control unit judges whether the tire is burst according to the tire air pressure detected by the detection device, when the tire bursts, the electronic control unit controls the air supply device and the relay valve of the execution device to inflate the air spring with burst tire, and simultaneously controls the electromagnetic valves of the rest air springs without burst tire to open for deflation until the height of the vehicle body is balanced, and closes the electromagnetic valves and the relay valve.
In the above scheme, the method further comprises the following steps:
the vehicle speed sensor of the detection device detects the vehicle speed, and the vehicle height sensor detects the height of the vehicle body;
when the vehicle is in a static state, the air pressure of each air spring is adjusted according to the signal of the vehicle height sensor to ensure the vehicle height balance:
if the vehicle body on one side of the vehicle is higher and the vehicle body on the other side is lower, the control cavity B of the relay valve on the lower side of the vehicle body is controlled by the electronic control unit to be connected with the high-pressure air storage tank, high-pressure air in the air inlet cavity A of the relay valve is rapidly filled into the air outlet cavity C and is filled into the air spring on the lower side of the vehicle body through the one-way valve, and the vehicle body on the lower side of the vehicle body is lifted;
meanwhile, the electronic control unit controls the air spring on the higher side of the vehicle body to deflate, so that the height of the vehicle body on the higher side of the vehicle body is reduced;
the height balance of the vehicle bodies on the left side and the right side is detected through the height sensor, and the air inflation and deflation of the air springs are stopped.
In the above scheme, the step of judging whether the tire is burst and controlling by the electronic control unit according to the tire pressure detected by the detection device is specifically:
the tire pressure monitoring device detects the current tire pressure and sends the current tire pressure to the electronic control unit of the vehicle when the vehicle is in a moving state;
the electronic control unit processes and calculates according to the tire pressure signal and the vehicle height signal, and if the change rate of the tire pressure is greater than a preset value m and the change rate of the vehicle height is greater than a preset value n, the electronic control unit judges that the vehicle has a tire burst;
the electronic control unit controls a control cavity B of a relay valve of the tire burst wheel to be communicated with the high-pressure air storage tank, high-pressure air in the air inlet cavity A is rapidly filled into the air outlet cavity C and is filled into an air spring 6 of the tire burst wheel through a one-way valve, and the height of the vehicle body with the lowered tire burst is rapidly increased;
the control cavity B of the relay valve for controlling the rest of the wheels without tire burst by the electronic control unit is not communicated with the high-pressure air storage tank, and the electromagnetic valve is controlled to deflate the rest of the air springs so as to reduce the height of the vehicle body above the wheels without tire burst;
and detecting the height of the vehicle body above each wheel through a height sensor until the height of the vehicle body reaches balance, and controlling the air spring to stop inflating and deflating.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, whether tire burst happens or not is judged by fusing information collected by the sensor, the electronic control unit judges that the tire burst happens to the vehicle, and the high-pressure inflation system of the air suspension is controlled to rapidly inflate the suspension of the tire burst wheel, so that the height of the vehicle body on one side of the tire burst of the vehicle is rapidly increased, and meanwhile, the air suspension of the wheel without the tire burst is properly deflated to rapidly reach a balanced state, so that the safety of the vehicle during the tire burst is improved.
2. According to the invention, through the rapid inflation and deflation of the high-pressure air suspension, the high-pressure air is inflated into the air spring of the tire burst wheel at the tire burst moment, and the air suspension of the wheel without the tire burst releases part of air, so that the balance of the height of the vehicle body is achieved, meanwhile, the rigidity of the air spring is increased, and the risk of heeling is reduced.
3. The invention fully utilizes the air supply device, the vehicle speed sensor, the tire pressure monitoring device and the vehicle body height sensor of the vehicle, and simplifies the structure of the tire burst safety control device.
4. The invention adopts the relay valve to replace a common electromagnetic valve to control the inflation of the air spring, thereby increasing the drift diameter of the air passage, shortening the reaction time and the pressure establishment time and increasing the inflation speed.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the tire pressure monitoring device of the present invention;
FIG. 3 is a control flow chart of the tire pressure monitoring device of the present invention;
FIG. 4 is a schematic diagram of a relay valve configuration;
FIG. 5 is a schematic diagram of an electronic control unit according to the present invention.
In the figure, 1, a vehicle speed sensor; 2. a body height sensor; 3. a tire pressure monitoring device; 4. an electronic control unit; 5. a tire; 6. an air spring; 7. an electromagnetic valve a; 8. a solenoid valve b; 9. a solenoid valve c; 10. a solenoid valve d; 11. an electromagnetic valve e; 12. an air dryer; 13. an air compressor; 14. a high pressure gas storage tank; 15. an electromagnetic valve f; 16. an electromagnetic valve g; 17. an electromagnetic valve h; 18. a one-way valve; 19. a relay valve; 301. a wireless transmitter; 302. a microcontroller; 303. a pressure sensor; 304. An acceleration sensor; 305. a low voltage battery.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; 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 by those skilled in the art according to specific situations.
Example 1
As shown in fig. 1, a suspension system includes an air spring 6, an air supply device, a detection device, an actuator, and an electronic control unit 4.
The air spring 6 is used for adjusting the height of the vehicle body; the air supply device is connected with the air spring 6; the detection device is used for detecting the air pressure of the tire; the execution device comprises an electromagnetic valve and a relay valve 19, and the relay valve 19 is respectively connected with the air spring 6 and the air supply device; the air spring 6 is connected with an electromagnetic valve; and the electronic control unit 4 is respectively connected with the detection device and the execution device, the electronic control unit 4 judges whether the tire is burst according to the tire air pressure detected by the detection device, when the tire is burst, the electronic control unit 4 controls the air supply device and the relay valve 19 to inflate the air spring 6 with burst, and simultaneously controls the electromagnetic valves of the other air springs 6 without burst to be opened to deflate.
Preferably, the air spring 6 is a bladder type air spring; the lower part of the air spring 6 is arranged on a suspension of a vehicle, and the upper part is arranged on a frame; the air pressure of the air spring 6 can be 0.4-0.8 MPa.
The air supply means includes an air dryer 12, an air compressor 13 and a high pressure air tank 14. The air compressor 13 is used for boosting air and storing the air discharged from the air spring 6 into the high-pressure air storage tank 14 after boosting the air. The air dryer 12 is used to dry air. The high-pressure gas storage tank 14 is used for storing high-pressure gas; the gas pressure of a common high-pressure gas storage tank is about 1MPa, the gas pressure of a high-pressure gas storage tank 14 can reach 15MPa, and the extremely large pressure difference between the high-pressure gas storage tank and the air spring 6 can ensure quick inflation and deflation at the moment of tire burst. The air supply device comprises a front wheel air supply device and a rear wheel air supply device which supply air to the front wheel and the rear wheel respectively and independently, the length of an air path is shortened, and the air supply speed is increased.
The electromagnetic valve comprises a two-position two-way electromagnetic valve and a two-position three-way electromagnetic valve; a two-position two-way electromagnetic valve and a two-position three-way electromagnetic valve are sequentially arranged on a pipeline for connecting the air spring 6 with the air supply device; the relay valve 19 comprises an air inlet cavity A, a control cavity B and an air outlet cavity C; the air inlet cavity A of the relay valve 19 is connected with the high-pressure air storage tank 14; the air outlet cavity C is connected with one end of a one-way valve 18, and the other end of the one-way valve 18 is connected with the air spring 6; the control cavity B is connected with a two-position three-way electromagnetic valve; when the two-position three-way electromagnetic valve is electrified, the air spring 6 and the relay valve 19 are respectively connected with the air compressor 13; when the two-position three-way electromagnetic valve is de-energized, the air spring 6 and the relay valve 19 are respectively connected with the high-pressure air storage tank 14.
The detection device comprises a vehicle speed sensor 1, a vehicle height sensor 2 and a tire pressure monitoring device 3. The vehicle speed sensor detects 1 whether the current vehicle is in a running state or a static state; in a static state, detecting whether the height of the vehicle body is horizontal at an initial position through the vehicle height sensor 2; as shown in fig. 2 and 3, the tire air pressure monitoring device 3 includes a wireless transmitter 301, a microcontroller MCU302, a pressure sensor 303, an acceleration sensor 304, and a low-voltage battery 305. The pressure sensor 303 is used to detect the tire air pressure. The acceleration sensor 304 is configured to detect an acceleration of the vehicle, and determine whether the vehicle is in a starting state, as a basis for whether the tire pressure monitoring device 3 works. The MCU302 is configured to receive the sensor signal and transmit the tire pressure signal to the ECU 4 through the wireless transmitter 301.
As shown in fig. 5, the electronic control unit 4 includes an input module, a control module, and an output module; the input module receives input signals of a vehicle speed sensor 1, a vehicle height sensor 2 and a tire pressure monitoring module 3 of the detection device; the control module judges whether the tire is burst according to the tire pressure detected by the detection device, when the tire is burst, the electronic control unit 4 controls the air supply device and the relay valve 19 to inflate the air spring 6 with burst, and simultaneously controls the electromagnetic valves of the rest air springs 6 without burst to be opened for deflation; the output module is connected with the execution device and controls the operation of the execution device according to the output of the control module. In particular, the method comprises the following steps of,
the control module judges whether the vehicle is in a static state at present according to the input of the vehicle speed sensor 1, and if the vehicle is in the static state, the control module adjusts the height of the vehicle body to be in a horizontal state according to the signal of the vehicle height sensor 2. If the vehicle is in a running state, the change rate of the current tire pressure and the change rate of the vehicle body height are monitored, if the change rate of the tire pressure is larger than a certain value m and the change rate of the vehicle body height is larger than a certain value n, the control module judges that the vehicle has a tire burst at the moment, and then the control module controls the electromagnetic valve and the relay valve to inflate or deflate the air spring 6. The output module is connected with the electromagnetic valve and controls the opening and closing of the electromagnetic valve according to the output of the control module.
In this embodiment, the actuator includes an electromagnetic valve, a relay valve, and a check valve. The solenoid valves comprise a two-position two-way solenoid valve a7, a solenoid valve b8, a solenoid valve c9, a solenoid valve d10, a two-position three-way solenoid valve e11, a solenoid valve f15, a solenoid valve g16 and a solenoid valve h 17. As shown in fig. 4, the relay valve 19 includes an intake chamber a, a control chamber B, and an exhaust chamber C; the air inlet cavity A of the relay valve 19 is connected with the high-pressure air storage tank 14; the air outlet cavity C is connected with one end of a one-way valve 18; the control cavity B is respectively connected with a two-position three-way electromagnetic valve. One end of the one-way valve 18 is connected with the air outlet cavity C of the relay valve 19, and the other end of the one-way valve is connected with the air spring 6, so that the air spring 6 is prevented from being deflated through the relay valve 19.
A control method of a suspension system according to the above, comprising the steps of:
the detection device detects the air pressure of the tire;
the electronic control unit 4 judges whether the tire is burst according to the tire air pressure detected by the detection device, when the tire is burst, the electronic control unit 4 controls the air supply device and the relay valve 19 of the execution device to inflate the air spring 6 with burst tire, and simultaneously controls the electromagnetic valves of the rest air springs 6 without burst tire to be opened for deflation until the height of the vehicle body reaches balance, and closes the electromagnetic valves and the relay valve 19.
The step that the electronic control unit 4 judges whether the tire is burst according to the tire pressure detected by the detection device and controls the tire is specifically as follows:
the speed sensor 1 of the detection device detects the speed of the vehicle, and when the vehicle is in a moving state, the tire pressure monitoring device 3 detects the current tire pressure and sends the current tire pressure to the electronic control unit 4 of the vehicle;
the electronic control unit 4 performs processing calculation according to the tire pressure signal and the vehicle height signal, and if the change rate of the tire pressure is greater than a preset value m and the change rate of the vehicle height is greater than a preset value n, the electronic control unit 4 judges that the vehicle has a tire burst;
the electronic control unit 4 controls a control cavity B of a relay valve 19 of the tire burst wheel to be communicated with the high-pressure air storage tank 14, high-pressure air in the air inlet cavity A is rapidly filled into the air outlet cavity C and is filled into an air spring 6 of the tire burst wheel through a one-way valve 18, and the height of the vehicle body with the lowered tire burst is rapidly increased;
the electronic control unit 4 controls the control cavity B of the relay valve 19 of the rest of the un-punctured wheels to be not communicated with the high-pressure air storage tank 14, and controls the electromagnetic valve to deflate the rest of the air springs 6, so that the height of the vehicle body above the un-punctured wheels is reduced;
the height of the vehicle body above each wheel is detected by the height sensor 2 until the vehicle body height reaches balance, and the air spring 6 is controlled to stop inflating and deflating.
The above method further comprises the steps of:
the vehicle speed sensor 1 of the detection device detects the vehicle speed, and the vehicle height sensor 2 detects the height of the vehicle body;
when the vehicle is in a static state, the air pressure of each air spring 6 is adjusted according to the signal of the vehicle height sensor 2 to ensure the vehicle height balance:
if the vehicle body on one side of the vehicle is higher and the vehicle body on the other side is lower, the electronic control unit 4 controls the control cavity B of the relay valve 19 on the lower side of the vehicle body to be connected with the high-pressure air storage tank 14, and high-pressure air in the air inlet cavity A of the relay valve 19 is rapidly filled into the air outlet cavity C and is filled into the air spring 6 on the lower side of the vehicle body through the one-way valve 18, so that the vehicle body on the lower side of the vehicle body is lifted;
meanwhile, the electronic control unit 4 controls the air spring 6 at the higher side of the vehicle body to deflate, so that the height of the vehicle body at the higher side of the vehicle body is reduced;
the height sensor 2 detects the height balance of the vehicle body on the left and right sides, and the air inflation and deflation of the air spring 6 are stopped.
The specific control process of the automobile tire burst safety suspension system in the embodiment is as follows:
the vehicle speed sensor 1 detects that the vehicle speed is zero, namely when the vehicle is in a static state, firstly, the inflation quantity of each air spring 6 is adjusted according to the signal of the vehicle height sensor 2 to ensure the vehicle height level; if the vehicle body on the left side of the vehicle is higher and the vehicle body on the right side is lower in the initial state, as shown in fig. 1, the control electromagnetic valve C9 and the electromagnetic valve d10 are kept in a closed state, the electromagnetic valve e11 and the electromagnetic valve h17 are de-energized, and the port B is opened, so that the control cavity B of the relay valve 19 is connected with the high-pressure air storage tank 14 through the electromagnetic valve e11 and the electromagnetic valve h17, the relay valve 19 is controlled by high pressure, high-pressure air in the air inlet cavity A is rapidly filled into the air outlet cavity C, and is filled into the air spring 6 on the right side through the check valve 18, and the vehicle body on the right side is lifted; the electromagnetic valve f15 and the electromagnetic valve g16 are electrified, the port A is opened, the control cavity B of the relay valve 19 is connected with the air compressor 13 through the electromagnetic valve f15 and the electromagnetic valve g16, the air pressure of the control cavity of the relay valve 19 is reduced, the air inlet cavity A is closed at the moment, no high-pressure air is filled into the left air spring 6, and meanwhile the check valve 18 prevents the left air spring 6 from being deflated through the relay valve 19; the electromagnetic valve a7 and the electromagnetic valve b8 are opened, the left air spring 6 is connected with the air compressor 13, high-pressure air released from the left air spring 6 enters the high-pressure air storage tank 14 after being boosted by the air compressor 13 again, the height of the left vehicle body is reduced, the heights of the left and right vehicle bodies are detected by the height sensor 2 until the heights of the left and right vehicle bodies are balanced, air charging and discharging of the air springs are stopped, the electronic control unit controls the electromagnetic valve a7, the electromagnetic valve b8, the electromagnetic valve c9 and the electromagnetic valve d10 to be closed, the two-position three-way electromagnetic valve e11, the electromagnetic valve f15, the electromagnetic valve g16 and the electromagnetic valve h17 are all in a power-on state, and the air spring 6 maintains pressure.
The vehicle speed sensor 1 detects that the vehicle is in a running state, i.e. the vehicle speed is not zero. At this time, the acceleration sensor 304 in the tire pressure monitoring device 3 detects a vehicle motion signal, the MCU starts to operate, and the pressure sensor 303 detects the current tire pressure and transmits it to the electronic control unit 4 of the vehicle through the wireless transmitter 301. The electronic control unit 4 receives the tire pressure signal transmitted by the tire pressure monitoring device 3 and the vehicle height signal transmitted by the vehicle height sensor, and processes and calculates. If the rate of change of the tire pressure is greater than a certain value m and the rate of change of the vehicle body height is greater than a certain value n, the electronic control unit 4 determines that a tire burst occurs in the vehicle at that time.
As shown in fig. 1, if the electronic control unit 4 determines that a tire burst occurs on the front left wheel of the vehicle, the control solenoid valve a7 is kept in a closed state, the solenoid valve f15 is de-energized, the port B is opened, so that the control chamber B of the relay valve 19 is connected with the high-pressure air tank 14 through the solenoid valve f15, the relay valve 19 is controlled by high pressure, high-pressure air in the air inlet chamber a is rapidly filled into the air outlet chamber C, and is filled into the air spring 6 above the front left wheel through the check valve 18, so that the height of the vehicle body at the front left wheel, which is reduced due to the tire burst, is rapidly increased; the electromagnetic valve e11, the electromagnetic valve g16 and the electromagnetic valve h17 are electrified, the port A is opened, so that the control cavity B of the relay valve 19 is connected with the air compressor 13 through the electromagnetic valve e11, the electromagnetic valve g16 and the electromagnetic valve h17, the air pressure of the control cavity B of the relay valve 19 is reduced, the air inlet cavity A is not communicated with the air outlet cavity C at the moment, high-pressure air is not filled into the air springs 6 above the rest of un-punctured wheels, and meanwhile, the check valve 18 prevents the air springs 6 from being deflated through the relay valve 19; the electromagnetic valve b8, the electromagnetic valve c9 and the electromagnetic valve d10 are opened to connect the air spring 6 with the air compressor 13, so that the height of the vehicle body above the wheel without tire burst is reduced; the height of the vehicle body above each wheel is detected by a height sensor 2; the height of the side wall is R, and if the tire model is 195/60R14, the height of the side wall is 195 x 60%; if the value of the vehicle body height sensor at the tire burst position is h, the value of the vehicle body height sensor above the wheel at the tire burst position is h + r, the vehicle body height is balanced, the air charging and discharging of the air spring 6 are stopped, the electronic control unit 4 controls the electromagnetic valve a7, the electromagnetic valve b8, the electromagnetic valve c9 and the electromagnetic valve d10 to be closed, the two-position three-way electromagnetic valve e11, the electromagnetic valve f15, the electromagnetic valve g16 and the electromagnetic valve h17 are all in a power-on state, and the air spring 6 maintains pressure. The air spring 6 is rapidly inflated through the high-pressure air storage tank 14, so that the balance of the height of the vehicle body during tire burst is guaranteed, the stability of the vehicle during tire burst is improved, and the possibility of heeling or even rollover is reduced. The relay valve 19 is adopted to replace an electromagnetic valve to inflate the air spring 6, so that the drift diameter of an air passage is increased, the reaction time and the pressure establishment time are shortened, and the inflation speed is increased.
Example 2
A vehicle comprising the suspension system of embodiment 1. Therefore, the advantageous effects of embodiment 1 are obtained, and the description thereof is omitted.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (6)
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| CN111645473A (en) * | 2019-08-27 | 2020-09-11 | 西华大学 | Novel truck suspension becomes rigidity supplementary device |
| CN112238725B (en) * | 2019-09-16 | 2021-11-05 | 吉林大学 | Thrust vector-based suspension spring failure emergency protection control system and method |
| CN112677727A (en) * | 2020-12-31 | 2021-04-20 | 华人运通(江苏)技术有限公司 | Control method for vehicle body height compensation of semi-active suspension |
| CN112660190A (en) * | 2021-01-04 | 2021-04-16 | 中车青岛四方车辆研究所有限公司 | System and method for adjusting working height of vehicle body of railway vehicle and railway vehicle |
| CN113844228A (en) * | 2021-10-22 | 2021-12-28 | 岚图汽车科技有限公司 | Safety control system and control method for vehicle after tire burst |
| CN116021935A (en) * | 2021-10-27 | 2023-04-28 | 比亚迪股份有限公司 | Control method, device and storage medium for vehicle and its active suspension |
| CN117183640B (en) * | 2022-05-31 | 2024-11-19 | 比亚迪股份有限公司 | Vehicle air suspension control method and device, medium, equipment and vehicle |
| CN116558461B (en) * | 2023-05-05 | 2025-03-11 | 岚图汽车科技有限公司 | Height sensor calibration method, device, equipment and readable storage medium |
| WO2025044624A1 (en) * | 2023-08-31 | 2025-03-06 | 芜湖伯特利汽车安全系统股份有限公司 | Gas supply system and air spring system having gas supply system |
| CN119239208B (en) * | 2024-12-06 | 2025-03-04 | 山东劲旅机械设备有限公司 | Chassis for motor home |
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