CN111231587A - A self-inflating constant pressure run-flat system - Google Patents

Abstract

The invention provides a self-inflating constant-pressure explosion-proof tire system, which belongs to the technical field of machinery. It solves the problem that the existing flat tire system cannot avoid the accident of flat tire due to the limited gas reserve. This self-inflating constant pressure run-flat tire system includes a vehicle central controller, an actuator, a detection component and an inflatable component fixed on each tire of the vehicle. The detection component is electrically connected to the vehicle central controller. The inflatable component includes a cylinder block and a sliding connection in The piston in the cylinder, the piston divides the inner cavity of the cylinder into a compression cavity and an intake cavity that communicates with the outside world, the cylinder is fixed on the hub of the corresponding tire, and the compression cavity is communicated with the corresponding tire through an inflation check valve. There is also an intake check valve that communicates with the intake chamber and the compression chamber in one direction, and the actuator is electrically connected with the vehicle central controller and can control the piston to slide back and forth. The system realizes the combination of early warning and control, and then eliminates the dangerous situation.

Description

A self-inflating constant pressure run-flat system

technical field

The invention belongs to the technical field of machinery, and relates to a self-inflating constant-pressure explosion-proof tire system.

Background technique

As we all know, in most cases, the "puncture" is often caused by under-pressure or over-pressure of the tire. When the air pressure does not meet the standard requirements, because the tire air pressure is too low, the sinking of the wheel increases, the radial deformation increases, the friction between the tread and the ground increases, the rolling resistance increases, and the internal stress of the carcass also increases, causing The temperature of the carcass rises sharply, and the tread rubber is wavy and flexed rapidly. Over time, the rubber becomes soft, which promotes rapid aging of the tire, causing local delamination of the carcass and increased tread wear. In this case, if the car is still driving at high speed on the highway, the above-mentioned reaction of the tire will be accelerated, and the occurrence of a tire blowout cannot be avoided. According to scientific data, the puncture mortality rate is almost 100% at a speed of 120 yards per hour or more; when the speed is about 100 yards per hour, the probability of overturning or damage after a puncture is also 100%; and a punctured tire at a speed of about 90 yards per hour can operate correctly and effectively Only 3% of people were able to control the driving and eventually stop the out-of-control vehicle smoothly.

At present, most mid-to-high-end models are equipped with tire pressure monitoring systems, including sensors and transmitters installed in the tires and receivers and displays installed in the cab, through which the tire pressure is monitored in real time. The whole process of detection, when the air pressure of a tire is abnormal, realizes an alarm reminder. However, what the system can do is only monitoring and reminders. It is easy to be ignored or cannot be stopped at will when driving on the highway to take timely measures, or when there are no conditions for taking corresponding measures in the wild, the accident of tire blowout cannot be avoided.

Therefore, in 2014, the applicant proposed a vehicle safety explosion-proof system that can automatically detect and inflate tire pressure during driving (application number: 201410586290.2), which includes a tire pressure monitoring system for detecting the tire pressure of each tire of the vehicle, An air pump, an air storage tank and a rotary joint respectively fixed on the hub of each wheel of the vehicle, each rotary joint is located outside the wheel hub, and the rotary shaft of each rotary joint is coaxially arranged with the corresponding wheel, and the air inlet interface of each rotary joint They are respectively connected with the air storage tank through the air intake pipes, and each air intake pipe is respectively provided with a first on-off solenoid valve; the air outlet ports of each rotary joint are respectively connected with the valve nozzles of the corresponding wheels through the air intake pipes; The pressure pipeline is communicated with the gas storage tank, and the pressure pipeline is provided with a second on-off solenoid valve.

The system can timely re-pressurize low-pressure tires during driving, which can effectively avoid tire burst accidents caused by low-pressure tires during high-speed driving. However, after research, the applicant found that it still has the following defects: in this system, whether the tire can always maintain normal air pressure during driving mainly depends on the gas reserve in the air tank, and as we all know, the installation space of the vehicle itself Therefore, the air storage tanks for emergency measures installed in the vehicle are very small, so the gas reserve is very limited. During the driving process, once the gas in the air storage tank is used up, the tires will be damaged. The required normal air pressure can no longer be guaranteed, nor can a puncture accident be avoided.

In order to reduce the occurrence of tire blowout accidents, the existing conventional methods mainly include the following points: 1. Increase the size of the air storage tank to increase the air storage capacity, but the installation space of the existing vehicles cannot meet the requirements, and it is necessary to adjust the vehicle It is difficult to design and the cost is higher. 2. Set up an alarm mechanism to prompt the driver to reduce the speed to reduce the probability of a tire blowout or to stop and wait for rescue. However, on high-speed, too slow speed or parking will pose a greater safety hazard.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above-mentioned problems in the existing technology, and propose a self-inflating constant pressure run-flat tire system.

The object of the present invention can be achieved through the following technical solutions: a self-inflating constant pressure run-flat tire system, comprising a vehicle central controller, a detection component for detecting the tire pressure of each tire of the vehicle, and an inflation component fixed on each tire of the vehicle, The detection assembly is electrically connected with the vehicle central controller, and the inflatable assembly includes a cylinder body and a piston slidably connected in the cylinder body, and the piston divides the inner cavity of the cylinder body into a compression chamber and an intake chamber that communicates with the outside world , the cylinder body is fixed on the hub of the corresponding tire, and the compression chamber is communicated with the corresponding tire through an inflation check valve. The tire system further includes an actuator capable of controlling the piston to slide back and forth, and the actuator is electrically connected to the vehicle central controller.

In this system, the detection component is used to monitor the current pressure of each tire at all times, and sends the monitored pressure data information to the vehicle central controller for protocol joint control, and the vehicle central controller compares and analyzes the pressure data information. When it is detected that the air pressure of a tire is lower than the set value, an execution command is sent to the actuator, and the actuator can control the inflation component on the corresponding tire to inflate the tire until the air pressure of the tire returns to normal, and the detection component will The detected normal pressure data is sent to the vehicle central controller, and the vehicle central controller sends a stop inflation command after the comparison and analysis confirms that it is normal.

This run-flat system is an unconventional design. By improving the design of the inflation structure, a unique structure of the inflation component is designed, that is, the compression chamber and the intake chamber are formed by the piston in the cylinder, and the actuator controls the piston to compress Pushing in the direction of the cavity causes the gas in the compression cavity to be compressed. Through the change of the pressure difference after compression, the gas in the compression cavity can be sent into the tire through the inflation check valve to realize the supplementary pressure of the tire, and then the actuator is controlled again. The piston slides back and resets, and through the action of the intake check valve, the gas in the intake chamber can be re-entered into the compression chamber, and then the above steps are repeated to continue to realize the supplementary pressure on the tire. That is to say, through the above-mentioned unique structural design, the system does not need to set up an air storage tank, which avoids the limitation of installation space, and at the same time, it can realize the mechanical supplementary pressure of the tire directly by inhaling air from the outside. It ensures that the tires can always maintain constant pressure stably during the driving process, realizes the combination of early warning and control to eliminate dangerous situations and related protocols, and avoids the occurrence of tire puncture accidents. At the same time, this system only inflates and repressurizes the tires whose air pressure is detected to be low, instead of simultaneously inflating and repressing four tires at the same time, thus avoiding the danger of other tires blowing out due to high tire pressure. Moreover, this system can continue to use the conventional wheel hubs in the market without making special modifications and too many changes. Only small holes are drilled in the corresponding parts of the wheel hubs, and an inflation check valve is installed on the outside of the small holes (the side of the air cavity on the ground contact surface). After the inflation check valve is installed, extend the air source input end of the inflation check valve to the outside of the hub (by the axle area) and communicate with the compression chamber of the cylinder block. The inflation check valve can ensure the normal tire pressure and the inflation process. Only high-pressure air intake can be used in the middle, and the air pressure in the tires will not leak out. In this application, the vehicle central controller is an on-board ECU.

Preferably, in the above-mentioned self-inflating constant pressure runflat system, each tire is provided with two sets of the above-mentioned inflatable components, and the two sets of inflatable components are symmetrically arranged on both sides of the corresponding wheel hub. By arranging two sets of inflatable components symmetrically, the tires can be inflated and pressured quickly, stably and evenly, which ensures that the tires can always maintain constant pressure stably during the driving process, and avoids the occurrence of tire blowout accidents.

Preferably, in the above-mentioned self-inflating constant pressure run-flat system, each tire is provided with the above-mentioned actuator, and the actuator comprises two semi-annular lever pressure bridges, one end of the two lever pressure bridges is hinged with each other, and the other One end is connected by a hydraulic component that can push the two lever pressure bridges to swing outward around the hinge point, the two lever pressure bridges are located between the two sets of corresponding inflatable assemblies and can push the pistons of the corresponding inflatable assemblies to slide by swinging. The hydraulic components can drive the two lever pressure bridges to swing outward to push the corresponding pistons to slide in the direction of the compression chambers. Through the change of the pressure difference after compression, the gas in the compression chambers can be sent into the tires through the inflation check valve. Quickly, stably and evenly inflate and repressurize the tires, which ensures that the tires can maintain constant pressure stably during the driving process, and avoids the occurrence of tire blowout accidents.

Preferably, in the above-mentioned self-inflating constant pressure run-flat system, each hydraulic component is connected to the master cylinder of the vehicle through a hydraulic oil circuit, and the hydraulic oil circuit is provided with an actuator capable of controlling the on-off of the hydraulic oil circuit. The first valve, the first executive valve is electrically connected with the vehicle central controller. The actuator is installed in the empty position in the hub, fixed on the outside of the brake disc or on the axle, and the actuator is connected to the brake master cylinder through the hydraulic oil circuit, so as to provide the actuator with the source power of inflation, and no additional installation is required. dynamic structure. It overcomes the problem of installation space limitation and solves one of the key technologies for intelligent self-inflation, so as to realize the priority of using the braking energy to pressurize the piston to carry out inflation and supplementary pressure during braking, and will not accelerate and drive normally. It has no influence on the power, and at the same time, the function of the brake hydraulic system is rationally used, which improves the utilization rate and functional extension of the functional system.

Preferably, in the above-mentioned self-inflating constant pressure runflat system, a return spring 1 is further provided between the two lever pressure bridges. The setting of the reset spring 1 can realize the automatic reset after the swinging of the two lever pressure bridges, so as to realize the reciprocating motion, thereby controlling the push of the piston to pressurize and inflate.

Preferably, in the above-mentioned self-inflating constant pressure run-flat system, each group of inflatable components includes at least two inflatable components, the piston of each inflatable component has a piston rod with one end extending out of the cylinder, and each piston A stress bridge is correspondingly fixed on the rod, and one end of the stress bridge is hinged on the wheel hub of the corresponding tire. A stable pressure guide plate is also arranged between each group of inflatable components and the corresponding lever pressure bridge. The stable pressure guide plate The plate surfaces at both ends and the hub are connected by two return springs, the force bridges are all abutted on the smooth pressure guide plate, and the lever pressure bridge can be pressed against the smooth pressure by swinging outward. On the guide plate, between the piston rod and the cylinder body, there is also a return spring 3 which always makes the piston rod move toward the outside of the cylinder.

At least two inflatable components in each group are inflated synchronously, which can achieve fast and stable pressure supplementation. The detection component sends the wheel pressure dynamics to the vehicle central controller in real time. The vehicle central controller detects through real-time dynamic analysis. When it is analyzed that the pressure of each tire is lower than the set value, an execution command is issued, and the execution valve is commanded and opened. In the open state, when general braking is required, the hydraulic flow preferentially passes through the actuator valve 1, and the actuator pushes the two lever pressure bridges to swing under the action of high pressure hydraulic flow. When the bridges are opposite, the lever presses the bridge against the stable pressure guide plate, thereby swinging the force-bearing bridge inward, pushing each piston to slide toward the compression chamber, and injecting the gas in the compression chamber into the tire through the inflation check valve. When the wheel rotates through the inflation angle, that is, when the stable pressure guide plate and the two lever pressure bridges are staggered, under the action of the return spring 2 and the return spring 3, the piston slides outward and resets. During the reset process, due to the action of the intake check valve , re-inhale the gas into the compression chamber, wait for the next cycle of air compression, and repeat until the wheel air pressure returns to normal, until the detection component sends the normal data to the vehicle central controller. until a stop inflation command is issued.

As an alternative solution, in the above-mentioned self-inflating constant pressure runflat system, each group of inflatable components includes one inflatable component, and a smooth pressure guide plate is also provided between each group of inflatable components and the corresponding lever pressure bridge. The plate surfaces at both ends of the pressure guide plate and the hub are connected by two return springs. The piston of the inflatable assembly has a piston rod with one end extending out of the cylinder, and the piston rod is fixed with the corresponding stable pressure guide plate. Connected, the lever pressure bridge can be pressed against the smooth pressure guide plate by swinging outwards, and between the piston rod and the cylinder is also provided with a return spring three that always makes the piston rod move toward the outside of the cylinder. .

The detection component sends the dynamic value of the wheel pressure to the vehicle central controller in real time. The vehicle central controller detects through real-time dynamic analysis. When it is analyzed that the pressure of each tire is lower than the set value, an execution command is issued, and the execution valve is ordered and opened. In the open state, when general braking is required, the hydraulic flow preferentially passes through the actuator valve 1, and the actuator pushes the two lever pressure bridges to swing under the action of high pressure hydraulic flow. When the pressure bridge is opposite, the lever pressure bridge presses against the stable pressure guide plate, thereby pushing each piston to slide toward the compression chamber and injecting the gas in the compression chamber into the tire through the inflation check valve. When the wheel rotates through the inflation angle, that is, when the stable pressure guide plate and the two lever pressure bridges are staggered, under the action of the return spring 2 and the return spring 3, the piston slides outward and resets. During the reset process, due to the action of the intake check valve , re-inhale the gas into the compression chamber, wait for the next cycle of air compression, and repeat until the wheel air pressure returns to normal, until the detection component sends the normal data to the vehicle central controller. until a stop inflation command is issued.

Preferably, in the above-mentioned self-inflating constant pressure runflat system, an air intake filter element is further provided on the cylinder body, one end of the air intake filter element is communicated with the air intake cavity, and the other end is communicated with the outside world. The design of the air intake filter element and the function of the air intake check valve can suck the outside air into the compression chamber of the cylinder block while preventing impurities from entering.

As an alternative solution, in the above-mentioned self-inflating constant pressure runflat system, each tire is provided with the above-mentioned actuator, the actuator includes two semicircular lever pressure bridges, and the middle of the two lever pressure bridges can push the two lever pressure bridges. The lever pressure bridges are connected with hydraulic components that move relatively, and the two lever pressure bridges are located between the two sets of inflatable components and can push the pistons of the corresponding inflatable components to slide through one end. The hydraulic parts can push the two lever pressure bridges to move relative to each other, thereby pushing the corresponding pistons to slide to inflate, that is, to perform automatic inflation through the center-opening type.

Preferably, in the above-mentioned self-inflating constant pressure runflat system, the system further includes a travel switch for detecting the travel displacement of the vehicle brake pedal connecting rod, the travel switch being connected to the vehicle central controller. This system takes priority after the brake action is triggered. Whether braking is required depends on the strength of stepping on the brake pedal, which is set in combination with the distance signal of the stroke displacement of the brake pedal link. That is, the stroke displacement of the brake pedal connecting rod is divided into the first pitch signal and the second pitch signal in advance, and the stroke switch is used as the command to trigger. When the first pitch signal is triggered, the signal is to turn on the inflatable actuator valve that needs to be inflated. , to pressurize the tires with lower air pressure; when the second pitch signal is triggered, the brake system starts to intervene to realize the normal braking function. This design does not affect the power of normal driving, and can effectively utilize the inertia of the body during driving. energy to implement the power energy and energy consumption required for intelligent self-inflation.

Compared with the prior art, the self-inflating constant pressure runflat system has the following advantages:

1. It is guaranteed that the tires can maintain constant pressure stably during the driving process, so that the driver can be alerted in advance and no longer drive blindly. The key is to automatically control and eliminate dangerous situations, realizing early warning and control to eliminate dangerous situations. Associative protocol type combination.

2. It avoids the occurrence of puncture accidents, guarantees the life safety of drivers and passengers, and reduces the safety threats in high-speed driving.

3. Effectively use the tire pressure detection function, use the detection function to play the detected results, and execute the required commands in the next step according to the results, so as to play a substantial role in the detection function.

4. The intelligent identification is flexibly executed individually, and only necessary inflation and supplementary pressure are performed for low-pressure tires, so as to avoid puncture caused by compensating and pressurizing four tires at the same time.

5. The actuator is connected to the brake master cylinder through the hydraulic oil circuit, so as to realize the priority of using the braking energy to pressurize the piston to perform inflation and supplementary pressure during braking, and will not affect the power during acceleration and normal driving. At the same time, the function of the brake hydraulic system is rationally used, which improves the utilization rate and functional extension of the functional system.

6. The intelligentization of functions and the realization of intelligent driving are the requirements for the advancement of automobile technology.

7. It is easy to manufacture, easy to install and maintain, even if it fails, it will not affect the normal driving, and the maintenance cost is also low.

8. It does not occupy space, does not affect the wheel design and wheel rotation, is simple and lightweight, and does not bring additional load or burden to the body and power.

Description of drawings

Figure 1 is the control principle diagram of the self-inflating constant pressure runflat system.

FIG. 2 is a schematic structural diagram of the self-inflating constant pressure runflat system in the first embodiment.

FIG. 3 is a schematic view of the structure of the inflatable assembly.

FIG. 4 is a schematic structural diagram of the self-inflating constant pressure runflat system in the second embodiment.

FIG. 5 is a schematic structural diagram of the self-inflating constant pressure runflat system in the third embodiment.

FIG. 6 is a schematic structural diagram of the self-inflating constant pressure runflat system in the fourth embodiment.

FIG. 7 is a schematic diagram of the structure of the first valve.

In the figure, 1, automobile central controller; 2, brake master cylinder; 3, executive valve 1; 3a, hydraulic input end; 3b, hydraulic output end; 3c, valve core; 3d, communication channel; 3e, solenoid coil; 4. Actuator; 4a, lever pressure bridge; 4b, hydraulic parts; 5, inflatable components; 5a, cylinder body; 5a1, compression chamber; 5a2, intake chamber; 5b, piston; 6, detection component; 7, travel switch ;8, executive valve two; 9, brake wheel cylinder; 10, tire; 10a, wheel hub; 11, inflation check valve; 12, intake check valve; 13, return spring one; 14, load bearing bridge; 15 , Smooth pressure guide plate; 16, return spring two; 17, return spring three; 18, intake filter element.

Detailed ways

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

Example 1

As shown in Figures 1-3, the self-inflating constant pressure run-flat system includes a vehicle central controller, an actuator 4, a detection component 6 for detecting the tire pressure of each tire 10 of the vehicle, and an inflator fixed on each tire 10 of the vehicle Component 5. The vehicle central controller is an on-board ECU, and the detection component 6 includes a pressure sensor for detecting tire pressure and a receiver for receiving signals sent by the pressure sensor, and the receiver is electrically connected to the vehicle central controller.

Specifically, each tire 10 is provided with two sets of inflatable assemblies 5 , the two sets of inflatable assemblies 5 are symmetrically arranged on both sides of the corresponding wheel hub 10 a , and each set of inflatable assemblies 5 includes at least two inflatable assemblies 5 . In this embodiment, two inflatable assemblies 5 are a group. Each inflatable assembly 5 has a cylinder block 5a and a piston 5b slidably connected in the cylinder block 5a. The cylinder block 5a is made of a high-strength aluminum alloy material equivalent to the material of the wheel hub 10a. The cylinder block 5a is installed on the wheel hub 10a by the axle The inner peripheral area is closely attached to the hub 10a and adhered to the peripheral wall of the balance weight and fixed. The piston 5b divides the inner cavity of the cylinder block 5a into a compression cavity 5a1 and an air intake cavity 5a2 which communicates with the outside world. The system can use the conventional wheel hub 10a in the market without special modifications and too many changes, only the corresponding part of the wheel hub 10a is drilled Small hole, install the inflation check valve 11 on the outside of the small hole (the air cavity side on the ground contact surface). After the inflation check valve 11 is installed, the air source input end of the inflation check valve 11 is extended to the outside of the hub 10a (by the axle area) to communicate with the compression chamber 5a1 of the cylinder block 5a, and the piston 5b is also provided with a one-way connection for the intake air. The intake check valve 12 of the chamber 5a2 and the compression chamber 5a1. Each tire 10 is provided with an actuator 4 which is electrically connected to the vehicle controller. The piston 5b has a piston rod with one end extending out of the cylinder 5a. The actuator 4 can control the piston 5b to slide back and forth. The cylinder block 5a is also provided with an intake filter element 18, one end of the intake filter element 18 is communicated with the intake cavity 5a2, and the other end is communicated with the outside world. In this embodiment, the diameter of the cylinder block 5a is appropriately enlarged, and the piston rod is also appropriately thickened, and the length of the cylinder block 5a is an ideal size so as not to interfere with the wheel rotation, braking and execution of the inflation process.

Further, the actuator 4 is installed in an empty position in the wheel hub 10a, and is fixed on the outside of the brake disc or on the axle. The actuator 4 includes two semi-annular lever pressure bridges 4a, one end of the two lever pressure bridges 4a is hinged to each other, and the other One end is connected by a hydraulic member 4b that can push the two lever pressing bridges 4a to swing outward around the hinge point, and a return spring 13 is also provided between the two lever pressing bridges 4a. Each hydraulic piece 4b is connected to the master brake cylinder 2 of the vehicle through a hydraulic oil circuit. The hydraulic oil circuit is provided with an executive valve 3 capable of controlling the on-off of the hydraulic oil circuit, and the executive valve 1 is electrically connected to the vehicle central controller. . The actuator valve one 3 includes a valve body, a valve core 3c and an electromagnetic coil 3e arranged in the valve body. The valve body has a hydraulic input end 3a for communicating with the hydraulic master pump and a hydraulic output end 3b for communicating with the hydraulic component 4b. The hydraulic input end 3a and the hydraulic output end 3b communicate through a communication channel 3d, the valve core 3c can block the communication channel 3d and the solenoid 3e can control the valve core 3c to move to open or block the communication channel 3d. The actuator 4 is connected to the brake master cylinder 2 through the hydraulic oil circuit, so as to provide the actuator 4 with the source power of inflation, and there is no need to install other power structures. The brake master cylinder 2 of the vehicle and the brake cylinders 9 on each tire 10 are also connected through the second actuator valve 8 . In this embodiment, the hydraulic member 4b is a hydraulic cylinder.

The two lever pressure bridges 4a are located between the two groups of corresponding inflatable assemblies 5, each piston rod is correspondingly fixed with a force bridge 14, one end of the force bridge 14 is hinged on the hub 10a of the corresponding tire 10, each group of inflatable components 5 and There is also a smooth pressure guide plate 15 between the corresponding lever pressure bridges 4a. Both ends of the smooth pressure guide plate 15 and the hub 10a are connected by return springs 16, and the force bridges 14 are against the smooth pressure plate. On the pressure guide plate 15, the lever pressure bridge 4a can be pressed against the smooth pressure guide plate 15 by swinging outward, and between the piston rod and the cylinder block 5a is also provided with a return spring that always makes the piston rod move toward the outside of the cylinder block 5a. 317.

The system also includes a travel switch 7 for detecting the travel displacement of the vehicle brake pedal link, and the travel switch 7 is connected to the vehicle central controller. The system takes priority after the braking action is triggered, and when braking, it is set by the magnitude of the brake pedaling force, combined with the distance of the stroke displacement of the brake pedal link. That is, the stroke displacement of the brake pedal connecting rod is divided into the first pitch and the second pitch in advance, and the stroke switch 7 is used as the trigger.

When the system is working, the detection component 6 sends the wheel pressure dynamics to the vehicle central controller in real time, and the vehicle central controller detects through real-time dynamic analysis. When the brake pedal triggers the signal of the first pitch coordination, the hydraulic oil circuit of the master cylinder 2 is preferentially connected to the execution valve one 3, and under the action of high-pressure hydraulic flow, the two valves are pushed. The lever pressure bridge 4a swings, and the hub 10a rotates until the smooth pressure guide plate 15 is opposite to the two lever pressure bridges 4a, the lever pressure bridge 4a presses against the smooth pressure guide plate 15, thereby pushing each piston 5b to slide toward the compression chamber 5a1 to compress the The gas in the cavity 5a1 is injected into the tire 10 through the inflation check valve 11 . When the wheel rotates through the charging angle, that is, when the smooth pressure guide plate 15 and the two lever pressure bridges 4a are staggered, under the action of the return spring 2 16 and the return spring 3 17, the piston 5b slides outward to reset. During the reset process, due to the air intake The function of the one-way valve 12 re-inhales the gas into the compression chamber 5a1, waits for the next cycle of air compression, and repeats until the wheel air pressure returns to normal, until the detection component 6 sends the normal data to the vehicle central controller, and the vehicle central controller is detected. After the analysis confirms that it is normal, the execution valve 1 3 is given a stop inflation command, which ensures that the tire 10 can maintain a constant pressure stably during the driving process of the vehicle, realizes the combination of early warning and control to eliminate danger, and avoids the occurrence of tire blowout accidents. . When the brake pedal touches the second pitch, the executive valve 28 is turned on, and the brake system starts to intervene to realize the normal braking function. This design does not affect the power of normal driving, and can effectively utilize the inertial energy of the body during driving to implement intelligent automatic braking. Power energy and energy consumption required for inflation.

Embodiment 2

The structure of this embodiment is basically the same as that of the first embodiment, the difference is that: as shown in FIG. 4 , each group of inflatable components 5 includes one inflatable component 5, and each group of inflatable components 5 and the corresponding lever pressure bridge 4a are connected. There is also a smooth pressure guide plate 15 between the two ends of the smooth pressure guide plate 15. The plate surfaces at both ends of the smooth pressure guide plate 15 are connected with the wheel hub 10a by a return spring II 16. The piston 5b of the inflatable assembly 5 has a piston with one end extending out of the cylinder 5a. The rod and the piston rod are fixedly connected with the corresponding smooth pressure guide plate 15. The lever pressure bridge 4a can be pressed against the smooth pressure guide plate 15 by swinging outward. The return spring three 17 has a tendency to move out of the cylinder 5a.

The detection component 6 sends the wheel pressure dynamics to the vehicle central controller in real time, and the vehicle central controller detects through real-time dynamic analysis. When it is analyzed that the pressure of each tire 10 is lower than the set value, an execution command is issued, and the execution valve 3 is executed. When the general braking is required, the hydraulic flow preferentially passes through the actuator valve 1 3, and the actuator 4 pushes the two lever pressure bridges 4a to swing under the action of the high-pressure hydraulic flow. At this time, the wheel hub 10a rotates smoothly. When the pressure guide plate 15 is opposite to the two lever pressure bridges 4a, the lever pressure bridge 4a presses against the stable pressure guide plate 15, thereby pushing each piston 5b to slide toward the compression chamber 5a1 and injecting the gas in the compression chamber 5a1 into the tire through the inflation check valve 11. within 10. When the wheel rotates through the charging angle, that is, when the smooth pressure guide plate 15 and the two lever pressure bridges 4a are staggered, under the action of the return spring 2 16 and the return spring 3 17, the piston 5b slides outward to reset. During the reset process, due to the air intake The function of the one-way valve 12 re-inhales the gas into the compression chamber 5a1, waits for the next cycle of air compression, and repeats until the wheel air pressure returns to normal, until the detection component 6 sends the normal data to the vehicle central controller, and the vehicle central controller is detected. After the analysis confirms that it is normal, the instruction to stop the inflation is issued to the executive valve one 3.

Embodiment 3

The structure of this embodiment is basically the same as that of the first embodiment. The difference is that: as shown in FIG. 5 , the actuator 4 includes two semicircular lever pressure bridges 4a, and the middle of the two lever pressure bridges 4a can push the two lever pressure bridges through the middle part. The bridges 4a are connected to the hydraulic parts 4b that move relatively, and the two lever pressure bridges 4a are located between the two sets of inflatable assemblies 5 and can push the piston 5b of the corresponding inflatable assembly 5 to slide through one end. The hydraulic member 4b can push the two lever pressure bridges 4a to move relative to each other, thereby pushing the corresponding piston 5b to slide to inflate, that is, to perform automatic inflation through the center-opening type.

Embodiment 4

The structure of this embodiment is basically the same as that of the first embodiment, the difference is that: as shown in FIG. 6 , the actuator 4 includes two semicircular lever pressure bridges 4a, and the middle of the two lever pressure bridges 4a can push the two lever pressure bridges through the middle part. The bridges 4a are connected to the hydraulic components 4b that move relatively, and the two lever pressure bridges 4a are located between the two sets of inflatable assemblies 5 . Each group of inflatable assemblies 5 includes one inflatable assembly 5, and between each group of inflatable assemblies 5 and the corresponding lever pressure bridge 4a is also provided with a smooth pressure guide plate 15, the plate surface at both ends of the smooth pressure guide plate 15 and the hub 10a They are all connected by a return spring II 16, the piston 5b of the inflatable assembly 5 has a piston rod with one end extending out of the cylinder 5a, the piston rod is fixedly connected with the corresponding smooth pressure guide plate 15, and the lever pressure bridge 4a swings It can be pressed against the stable pressure guide plate 15, and between the piston rod and the cylinder 5a is also provided with a return spring 3 17 that always makes the piston rod move toward the outside of the cylinder 5a. At the same time, the cylinder 5a of each inflatable assembly 5 is designed to be installed on the hub 10a and integrated into one body, half of which is outside the hub 10a, and the other half is directly embedded in the inner side of the air cavity.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definitions of the appended claims range.

Although this article mostly uses 1, automobile central controller; 2, brake master cylinder; 3, executive valve one; 4, actuator; 4a, lever pressure bridge; 4b, hydraulic parts; Cylinder block; 5a1, compression chamber; 5a2, intake chamber; 5b, piston; 6, detection component; 7, travel switch; 8, executive valve two; 9, brake cylinder; 10, tire; 10a, wheel hub; 11 , Inflatable check valve; 12, Intake check valve; 13, Return spring one; 14, Force bridge; 15, Smooth pressure guide plate; 16, Return spring two; 17, Return spring three; 18, Intake filter element terms, but does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; it is contrary to the spirit of the present invention to interpret them as any kind of additional limitation.

Claims (10)

1. A self-inflating constant pressure run-flat tire system, comprising a vehicle central controller, a detection component (6) for detecting the tire pressure of each tire (10) of a vehicle, and an inflation component (5) fixed on each tire (10) of the vehicle ), the detection assembly (6) is electrically connected with the vehicle central controller, and it is characterized in that the inflatable assembly (5) comprises a cylinder (5a) and a piston (5b) slidably connected in the cylinder (5a), The piston (5b) divides the inner cavity of the cylinder (5a) into a compression cavity (5a1) and an intake cavity (5a2) communicating with the outside world, and the cylinder (5a) is fixed on the hub of the corresponding tire (10). (10a) and the compression chamber (5a1) communicates with the corresponding tire (10) through the inflation check valve (11), and the piston (5b) is also provided with a one-way communication between the intake chamber (5a2) and the compression chamber (5a1) ) air intake check valve (12), the run-flat system further includes an actuator (4) capable of controlling the piston (5b) to slide back and forth, the actuator (4) being electrically connected to the vehicle central controller. 2. The self-inflating constant pressure run-flat tire system according to claim 1, wherein each tire (10) is provided with two groups of the above-mentioned inflatable assemblies (5), and the two groups of inflatable assemblies (5) are close to the corresponding wheel hub The two sides of (10a) are arranged symmetrically. 3. The self-inflating constant pressure run-flat tire system according to claim 2, characterized in that, each tire (10) is provided with the above-mentioned actuator (4), and the actuator (4) comprises two half annular One end of the two lever pressure bridges (4a) is hinged with each other, and the other end is connected by a hydraulic part (4b) that can push the two lever pressure bridges (4a) to swing outward around the hinge point, and the two lever pressure bridges (4a) are connected. (4a) is located between the two sets of corresponding inflatable assemblies (5) and can push the pistons (5b) of the corresponding inflatable assemblies (5) to slide by swinging. 4. The self-inflating constant pressure run-flat tire system according to claim 3, characterized in that, each hydraulic component (4b) is connected to the master brake cylinder (2) of the vehicle through a hydraulic oil circuit, and the hydraulic oil circuit is connected to the brake master cylinder (2) of the vehicle. An executive valve one (3) capable of controlling the opening and closing of the hydraulic oil circuit is provided, and the first executive valve (3) is electrically connected to the vehicle central controller. 5. The self-inflating constant pressure runflat system according to claim 3 or 4, characterized in that a return spring (13) is further provided between the two lever pressure bridges (4a). 6. The self-inflating constant pressure run-flat tire system according to claim 5, wherein each group of inflatable assemblies (5) includes at least two inflatable assemblies (5), and the piston ( 5b) has a piston rod with one end protruding out of the cylinder (5a), each piston rod is correspondingly fixed with a force bridge (14), and one end of the force bridge (14) is hinged to the corresponding tire (10) On the wheel hub (10a), a smooth pressure guide plate (15) is also provided between each group of inflatable components (5) and the corresponding lever pressure bridge (4a), and the plate surfaces at both ends of the smooth pressure guide plate (15) The hubs (10a) are connected by the second return spring (16), the force bridges (14) all abut on the smooth pressure guide plate (15), and the lever pressure bridge (4a) The swing can be pressed against the smooth pressure guide plate (15), and between the piston rod and the cylinder (5a), there is also a return spring three (3) ( 17). 7. The self-inflating constant pressure run-flat tire system according to claim 5, wherein each group of inflatable assemblies (5) includes an inflatable assembly (5), and each group of inflatable assemblies (5) is associated with a corresponding lever pressure A smooth pressure guide plate (15) is also arranged between the bridges (4a), and the plate surfaces at both ends of the smooth pressure guide plate (15) are connected with the hub (10a) by a second return spring (16). The piston (5b) of the inflatable assembly (5) has a piston rod with one end extending out of the cylinder (5a), the piston rod is fixedly connected with the corresponding smooth pressure guide plate (15), and the lever pressure bridge (4a) ) can be pressed against the smooth pressure guide plate (15) by swinging outward, and between the piston rod and the cylinder (5a), there is also a Return spring three (17). 8. The self-inflating constant pressure run-flat tire system according to claim 1 or 2 or 3 or 4, characterized in that, an intake filter element (18) is further provided on the cylinder block (5a), and the intake filter element is (18) One end communicates with the air inlet chamber (5a2), and the other end communicates with the outside. 9 . The self-inflating constant pressure run-flat tire system according to claim 2 , wherein the actuator ( 4 ) is provided on each tire ( 10 ), and the actuator ( 4 ) comprises two semicircular Lever pressure bridges (4a), the middle parts of the two lever pressure bridges (4a) are connected by a hydraulic member (4b) capable of pushing the two lever pressure bridges (4a) to move relative to each other, and the two lever pressure bridges (4a) are located in two sets of inflatable components (5). ) and through one end can push the piston (5b) of the corresponding inflatable assembly (5) to slide. 10. The self-inflating constant pressure run-flat tire system according to claim 4, wherein the system further comprises a travel switch (7) for detecting the travel displacement of the vehicle brake pedal connecting rod, and the travel switch (7) is connected to vehicle controller.

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