阅读说明：本技术 一种车辆爆胎后的安全控制系统及控制方法 (Safety control system and control method for vehicle after tire burst ) 是由 陈奎 付斌 裴金顺 郑涛涛 尚玉伟 于 2021-10-22 设计创作，主要内容包括：本发明提供一种车辆爆胎后的安全控制系统及控制方法,控制系统包括空气悬架控制单元、多个胎压传感器、多个空气弹簧和一个分配阀,其中,车辆的每一个轮胎内放置一个胎压传感器和一个空气弹簧。本发明通过胎压传感器及时探测车辆轮胎的压力,在车辆爆胎发生压力快速降低时,判断为车辆爆胎,并通过空气悬架主动升高爆胎侧车身高度,从而使车辆四个轮胎的车身高度保持一致,通过及时的补偿轮胎爆胎后车身降低的高度,将会大大减少车辆侧偏的发生。(The invention provides a safety control system and a control method after a vehicle tire burst. The invention detects the pressure of the vehicle tyre in time through the tyre pressure sensor, judges the vehicle tyre burst when the pressure of the vehicle tyre burst is rapidly reduced, and actively raises the height of the vehicle body at the tyre burst side through the air suspension, thereby keeping the height of the vehicle body of the four tyres of the vehicle consistent, and greatly reducing the occurrence of vehicle lateral deviation by compensating the reduced height of the vehicle body after the tyre burst in time.)

1. A safety control system after a vehicle tire burst is characterized by comprising an air suspension control unit, a plurality of tire pressure sensors, a plurality of air springs and a distribution valve, wherein one tire pressure sensor and one air spring are arranged in each tire of the vehicle;

each tire pressure sensor is used for detecting the pressure value of the corresponding tire of the vehicle in real time and sending the pressure value of the tire to the air suspension control unit;

the air suspension control unit is used for calculating the change rate of the tire pressure value in real time according to the pressure value of each tire, and when the change rate of the tire pressure value exceeds a first set threshold value, the tire is determined to be in a tire burst state; and opening the distribution valve and the electromagnetic valve of the tire in the flat tire state, so that the air storage tank inflates air to the air spring corresponding to the tire in the flat tire state, and the height of the vehicle body at the position of the tire in the flat tire state is raised.

2. The safety control system of claim 1, further comprising a body controller;

the automobile body controller is used for receiving an electric signal which is input by each tire pressure sensor through a wire harness and converts the identified tire pressure value into an electric signal, converting the electric signal into a pressure value, and inputting the pressure value to the air suspension control unit through a CAN bus.

3. The safety control system according to claim 1 or 2, further comprising a plurality of body height sensors corresponding to a plurality of tires of a vehicle;

each of the body height sensors is configured to detect a body height at a corresponding tire position and transmit the detected body height to the air suspension control unit.

4. The safety control system according to claim 3, wherein the air suspension control unit opens the distribution valve and the solenoid valve of the tire in the flat tire state to allow the air tank to inflate the air spring corresponding to the tire in the flat tire state to raise the vehicle body height at the tire position in the flat tire state, further comprising:

and if the difference between the height of the vehicle body at the tire in the tire burst state and the height of the vehicle body at the tire not in the tire burst state is smaller than a second set threshold value, controlling the distribution valve to switch the electromagnetic valve of the corresponding tire, and stopping inflating the corresponding inflating spring.

5. The safety control system of claim 4, further comprising a compressor that charges the air reservoir.

6. A safety control method of a safety control system after a vehicle tire burst is characterized in that the safety control system comprises an air suspension control unit, a plurality of tire pressure sensors, a plurality of air springs and a distribution valve, wherein one tire pressure sensor and one air spring are arranged in each tire of the vehicle; the safety control method comprises the following steps:

each tire pressure sensor detects the pressure value of a corresponding tire of the vehicle in real time and sends the pressure value of the tire to the air suspension control unit;

the air suspension control unit calculates the change rate of the tire pressure value in real time according to the pressure value of each tire, and when the change rate of the tire pressure value exceeds a first set threshold value, the tire is determined to be in a flat tire state; and opening the distribution valve and the electromagnetic valve of the tire in the flat tire state, so that the air storage tank inflates air to the air spring corresponding to the tire in the flat tire state, and the height of the vehicle body at the position of the tire in the flat tire state is raised.

7. The safety control method according to claim 6, characterized by further comprising:

the height of the vehicle body at each tire position of the vehicle is detected in real time by using a vehicle body height sensor and is sent to the air suspension control unit;

and the air suspension control unit judges whether the difference between the height of the vehicle body at the tire in a tire burst state and the height of the vehicle body at the tire not in a tire burst state is smaller than a second set threshold value, if so, the air suspension control unit controls the distribution valve to switch the electromagnetic valve of the corresponding tire and stops inflating the corresponding inflating spring.

Technical Field

The invention relates to the field of vehicle control, in particular to a safety control system and a control method after a vehicle tire burst.

Background

The term "flat tire" refers to a tire that collapses in an extreme period of time due to sudden rupture or rapid loss of air. The harm of vehicle sudden tire burst is very big, and the atmospheric pressure of car tire becomes 0 in the twinkling of an eye, has not had the support of atmospheric pressure, and the tire can be flattened, and the automobile body height of this side can reduce suddenly, and the change at vehicle center can lead to the vehicle to one side off tracking of tire burst. If the vehicle is driven at high speed or braked suddenly, the lateral deviation is aggravated, and the vehicle is even overturned, so that the vehicle is damaged and the casualties are caused. Therefore, how to control the tire burst is an important issue to reduce the accident rate, and how to slow down the occurrence of vehicle lateral deviation and strive for safe braking time for drivers when the tire burst occurs is also an important means to reduce the accident rate of the tire burst. If the height of the vehicle body is reduced after the tire is burst can be timely compensated, the occurrence of vehicle sideslip can be greatly reduced.

Disclosure of Invention

The invention provides a safety control system and a control method for a vehicle after tire burst, aiming at the technical problems in the prior art.

According to a first aspect of the present invention, there is provided a safety control system after a vehicle has a tire burst, comprising an air suspension control unit, a plurality of tire pressure sensors, a plurality of air springs, and a distribution valve, wherein one tire pressure sensor and one air spring are disposed in each tire of the vehicle; each tire pressure sensor is used for detecting the pressure value of the corresponding tire of the vehicle in real time and sending the pressure value of the tire to the air suspension control unit; the air suspension control unit is used for calculating the change rate of the tire pressure value in real time according to the pressure value of each tire, and when the change rate of the tire pressure value exceeds a first set threshold value, the tire is determined to be in a tire burst state; and opening the distribution valve and the electromagnetic valve of the tire in the flat tire state, so that the air storage tank inflates air to the air spring corresponding to the tire in the flat tire state, and the height of the vehicle body at the position of the tire in the flat tire state is raised.

On the basis of the technical scheme, the invention can be improved as follows.

Optionally, the safety control system further includes a vehicle body controller; the automobile body controller is used for receiving an electric signal which is input by each tire pressure sensor through a wire harness and converts the identified tire pressure value into an electric signal, converting the electric signal into a pressure value, and inputting the pressure value to the air suspension control unit through a CAN bus.

Optionally, the safety control system further comprises a plurality of body height sensors corresponding to a plurality of tires of the vehicle; each of the body height sensors is configured to detect a body height at a corresponding tire position and transmit the detected body height to the air suspension control unit.

Optionally, the air suspension control unit opens the distribution valve and the electromagnetic valve of the tire in the flat tire state, so that the air storage tank inflates air to the air spring corresponding to the tire in the flat tire state, so as to raise the vehicle body height at the tire position in the flat tire state, and the air suspension control unit further includes: and if the difference between the height of the vehicle body at the tire in the tire burst state and the height of the vehicle body at the tire not in the tire burst state is smaller than a second set threshold value, controlling the distribution valve to switch the electromagnetic valve of the corresponding tire, and stopping inflating the corresponding inflating spring.

Optionally, the safety control system further comprises a compressor, and the compressor inflates the air storage tank.

According to a second aspect of the present invention, there is provided a safety control method based on a safety control system after a vehicle has punctured, the safety control system comprising an air suspension control unit, a plurality of tire pressure sensors, a plurality of air springs, and a distribution valve, wherein one tire pressure sensor and one air spring are disposed in each tire of the vehicle; the safety control method comprises the following steps: each tire pressure sensor detects the pressure value of a corresponding tire of the vehicle in real time and sends the pressure value of the tire to the air suspension control unit; the air suspension control unit calculates the change rate of the tire pressure value in real time according to the pressure value of each tire, and when the change rate of the tire pressure value exceeds a first set threshold value, the tire is determined to be in a flat tire state; and opening the distribution valve and the electromagnetic valve of the tire in the flat tire state, so that the air storage tank inflates air to the air spring corresponding to the tire in the flat tire state, and the height of the vehicle body at the position of the tire in the flat tire state is raised.

Optionally, the method further includes: the height of the vehicle body at each tire position of the vehicle is detected in real time by using a vehicle body height sensor and is sent to the air suspension control unit; and the air suspension control unit judges whether the difference between the height of the vehicle body at the tire in a tire burst state and the height of the vehicle body at the tire not in a tire burst state is smaller than a second set threshold value, if so, the air suspension control unit controls the distribution valve to switch the electromagnetic valve of the corresponding tire and stops inflating the corresponding inflating spring.

According to the safety control system and the control method for the vehicle after tire burst, the pressure of the vehicle tire is detected in time through the tire pressure sensor, when the pressure of the vehicle tire is rapidly reduced due to tire burst, the vehicle tire burst is judged, the height of the vehicle body on the burst side is actively increased through the air suspension, so that the heights of the four tires of the vehicle are kept consistent, and the vehicle sidesway can be greatly reduced by compensating the reduced height of the vehicle body after the tire burst in time.

Drawings

FIG. 1 is a schematic structural diagram of a safety control system after a vehicle tire burst according to the present invention;

fig. 2 is a schematic flow chart of a safety control method after a vehicle tire burst provided by the invention.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1, a schematic structural diagram of a safety control system after a vehicle has a tire burst is provided, the safety control system mainly includes an air suspension control unit, a plurality of tire pressure sensors, a plurality of air springs, and a distribution valve, wherein one tire pressure sensor and one air spring are disposed in each tire of the vehicle.

Each tire pressure sensor is used for detecting the pressure value of the corresponding tire of the vehicle in real time and sending the pressure value of the tire to the air suspension control unit; the air suspension control unit is used for calculating the change rate of the tire pressure value in real time according to the pressure value of each tire, and when the change rate of the tire pressure value exceeds a first set threshold value, the tire is determined to be in a flat tire state; and opening the distribution valve and the electromagnetic valve of the tire in the flat tire state, so that the air storage tank inflates air to the air spring corresponding to the tire in the flat tire state, and the height of the vehicle body at the position of the tire in the flat tire state is raised.

It can be understood that, in order to reduce the occurrence of vehicle lateral deviation due to tire burst, the embodiment of the invention provides a set of safety control system after vehicle tire burst, which mainly comprises a tire pressure sensor arranged in each tire of a vehicle to monitor the pressure value of each tire of the vehicle in real time, and transmit the monitored pressure value to an air suspension control unit.

The air suspension control unit calculates the change rate of the pressure value of each tire, if the change rate is greater than a set value, the tire is indicated to be flat, the height of a vehicle body at the flat tire position needs to be lifted, and specifically, the method for lifting the height of the vehicle body is that the air suspension control unit controls and opens a distribution valve and an electromagnetic valve of the tire in the flat tire state, so that an air storage tank inflates air to an air spring corresponding to the tire in the flat tire state, the height of the vehicle body at the flat tire position is lifted through the air spring and is kept consistent with the height of the vehicle body at other tire positions, and therefore the vehicle is prevented from being laterally deviated and even turned over.

The invention detects the pressure of the vehicle tyre in time through the tyre pressure sensor, judges the vehicle tyre burst when the pressure of the vehicle tyre burst is rapidly reduced, and actively raises the height of the vehicle body at the tyre burst side through the air suspension, thereby keeping the height of the vehicle body of the four tyres of the vehicle consistent, and greatly reducing the occurrence of vehicle lateral deviation by compensating the reduced height of the vehicle body after the tyre burst in time.

In a possible embodiment mode, the safety control system further comprises a vehicle body controller; and the automobile body controller is used for receiving an electric signal which is input by each tire pressure sensor through a wire harness and converts the identified tire pressure value into a pressure value, and the electric signal is input to the air suspension control unit through a CAN bus.

It should be understood that the tire pressure value monitored by the tire pressure sensor cannot be transmitted to the safety control system, a vehicle body controller needs to be arranged, and each tire pressure sensor converts the pressure value of the tire to be detected into an electric signal which is input to the vehicle body controller through a wire harness. The automobile body controller converts the electric signal into a pressure value P and inputs the pressure value P to the air suspension control unit through the CAN bus.

In one possible embodiment, the safety control system further comprises a plurality of body height sensors corresponding to a plurality of tires of the vehicle; each vehicle body height sensor is used for detecting the vehicle body height at the corresponding tire position and sending the detected vehicle body height to the air suspension control unit; correspondingly, the air suspension control unit opens the distribution valve and the electromagnetic valve of the tire in the flat tire state, so that the air storage tank inflates air to the air spring corresponding to the tire in the flat tire state, so as to lift the vehicle body height at the tire position in the flat tire state, and the air suspension control unit further comprises: and if the difference between the height of the vehicle body at the tire in the tire burst state and the height of the vehicle body at the tire not in the tire burst state is smaller than a second set threshold value, controlling the distribution valve to switch the electromagnetic valve of the corresponding tire, and stopping inflating the corresponding inflating spring.

It can be understood that the control suspension control system further comprises four body height sensors, which are respectively used for detecting the body height of the vehicle at four tire positions, if a tire bursts, the body height at this position is lower than the body height at the other three tire positions, and at this time, it is required to control the air spring corresponding to the tire burst to inflate to raise the body height at this position, and when the difference between the body height at this position and the body height at the other positions is smaller than a set threshold value, it is considered that the body height at this position is consistent with the body height at the other positions, and the adjustment of the body height is finished.

The air suspension control unit controls the distribution valve to open corresponding electromagnetic valves when the air springs are required to be inflated, so that the air storage tank is communicated with corresponding pipelines of the air springs, and the corresponding air springs are inflated through the air storage tank.

Referring to fig. 2, a safety control method based on a safety control system after a vehicle has punctured is provided, wherein the safety control system includes an air suspension control unit, a plurality of tire pressure sensors, a plurality of air springs, and a distribution valve, wherein one tire pressure sensor and one air spring are disposed in each tire of the vehicle.

The safety control method mainly comprises the following steps:

step 1: the tire pressure sensor identifies four tire pressure values and converts the tire pressure values into electric signals to be input to the vehicle body controller through the wire harness.

Step 2: the automobile body controller converts the sensor electrical signal into a pressure value P and inputs the pressure value P to the air suspension control unit through the CAN bus.

And step 3: the air suspension monitors the tire pressure values P of the four tires and calculates the pressure change rate of the tire tires: a ═ dP/dt.

And 4, step 4: the air suspension control unit judges whether the tire is flat or not, and when the calculated vehicle tire pressure change rate a is dP/dt > b (a flat tire pressure change threshold value can be obtained through a calibration test), the vehicle tire is judged to be flat.

And 5: the air suspension control unit controls the compressor and the electromagnetic valve of the corresponding vehicle to be opened, and the air spring of the corresponding tire is inflated, so that the height of the vehicle body corresponding to the tire is increased.

Step 6: and the air spring control unit reads corresponding height values of the vehicle body height sensors on the four tires, and when the vehicle body height difference value corresponding to the four tires is less than b mm, the control unit controls the compressor and the electromagnetic valve to be closed to stop inflating the air springs.

According to the safety control system and the control method for preventing tire burst, provided by the embodiment of the invention, the vehicle always keeps the whole vehicle body running at the same height by judging and identifying the tire burst in time and compensating the height of the vehicle body reduced after the tire burst through the air suspension in time, so that the occurrence of vehicle lateral deviation can be greatly reduced, and the occurrence of vehicle runaway caused by the lateral deviation after the vehicle is driven to burst is avoided.

It should be noted that, in the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.