Tire antiskid method, tire antiskid device and vehicle

Abstract

The invention relates to a tire anti-skid method, a tire anti-skid device and a vehicle, and the tire anti-skid method comprises the following steps: spraying gas to a road surface in front of a tire advancing direction; the gas forms bubbles on the road surface to increase the friction coefficient between the tire contact surface and the road surface. Gas is sprayed to the road surface in front of the tire advancing direction, so that bubbles are generated on the wet and slippery ground to be contacted with the tire, a liquid bridge is formed on the contact surface, a solid-liquid-gas three-phase interface is formed, capillary force is generated, the actual friction coefficient of the road surface is increased, the friction force is enhanced, the road holding force of the tire is enhanced, and the slipping risk of the tire is remarkably reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle anti-skid technology, in particular to a tire anti-skid method, a tire anti-skid device and a vehicle. BACKGROUND

[0002] When a vehicle is running on a road surface in a muddy, wet, icy or oily state, it is easy to slip, which causes the vehicle to lose balance instantaneously and poses a safety hazard. To improve the problem of vehicle slip, the tire material and tread pattern are generally optimized to improve the tire grip performance, or the central tire inflation system (CTIS) or the built-in air pump technology is used to adjust the tire pressure by sensors and vehicle-mounted ECU to change the tire contact area and deformation characteristics, but the traditional way mostly changes different parameters of the tire to indirectly improve the friction force received by the tire, which has a lagging response and limited anti-skid effect. SUMMARY

[0003] Therefore, the present application provides a tire anti-skid method, a tire anti-skid device and a vehicle, which can quickly increase the friction between the tire and the ground and significantly reduce the risk of vehicle slip.

[0004] A tire anti-skid method, comprising the following steps:

[0005] Spraying gas to the road surface in front of the tire running direction;

[0006] The gas forms bubbles on the road surface, increasing the friction coefficient between the tire contact surface and the road surface.

[0007] In one embodiment, before the step of spraying gas to the road surface in front of the tire running direction, the following step is further included:

[0008] Obtaining road conditions or tire status or obtaining that the vehicle is in a side slip or braking state;

[0009] According to the road conditions or tire status or obtaining that the vehicle is in a side slip or braking state, sending a gas spraying instruction to spray gas to the road surface in front of the tire running direction.

[0010] In one embodiment, the step of obtaining road conditions specifically includes:

[0011] Obtaining that the road surface humidity value is greater than the rated humidity value, and / or, obtaining that the road surface water film value is greater than the rated water film value, and / or, obtaining that the road surface temperature value is lower than the rated temperature value and identifying that the road surface has snow or ice.

[0012] In one embodiment, the step of obtaining tire status specifically includes:

[0013] The contact pressure value of the road surface to the tire surface is less than the rated pressure value; and / or, the torque value received by the tire is less than the rated torque value; and / or, the wheel speed difference of the tire exceeds the rated difference value.

[0014] In one embodiment, the step of spraying gas to the road surface in front of the tire running direction specifically includes:

[0015] Releasing the gas flow at a speed of 10-100 ml / s in continuous or pulse mode along the tire running track.

[0016] In one embodiment, before the step of spraying gas to the road surface in front of the tire running direction, it further includes:

[0017] Compressing the gas with a weight not less than air to 3-5 bar.

[0018] In one embodiment, the gas includes one or more of air, nitrogen, carbon dioxide or automobile exhaust gas.

[0019] A tire anti-skid device includes a gas spraying assembly, a compression pump, a gas storage tank, a controller and a monitoring element, the controller is electrically connected with the gas spraying assembly, the compression pump and the monitoring element, the gas spraying assembly, the gas storage tank and the compression pump are connected in sequence, and the nozzle of the gas spraying assembly is used for spraying gas to the road surface in front of the tire running direction.

[0020] In one embodiment, the monitoring element includes a humidity sensor for monitoring the humidity of the road surface;

[0021] And / or, the monitoring element includes an optical sensor for identifying the texture and state of the road surface;

[0022] And / or, the monitoring element includes a temperature sensor for monitoring the temperature of the road surface;

[0023] And / or, the monitoring element includes a pressure sensor for monitoring the contact pressure of the tire;

[0024] And / or, the monitoring element includes a torque sensor for monitoring the torque received by the tire.

[0025] In one embodiment, the gas spraying assembly includes a nozzle, an adjustable pipe, a quick plug and a spraying valve, the nozzle, the adjustable pipe, the quick plug and the gas storage tank are connected in sequence, the spraying valve is connected with the quick plug for controlling the on-off of the quick plug.

[0026] In one embodiment, the outlet opening angle of the nozzle is 10-15°, and / or the adjustable tube comprises 8-20 series-connected aluminum alloy or nylon knurled units, each of which has a spherical boss at one end and a spherical cavity at the other end, and the adjacent two knurled units are rotatably connected by an O-shaped sealing ring.

[0027] In one embodiment, the tire anti-slip device further comprises a magnetic base, and the compression pump and the gas tank are arranged on the magnetic base, and the magnetic base is used for being adsorbed to the bottom or side of the vehicle.

[0028] A vehicle comprises a vehicle body, a tire and the tire anti-slip device, the tire is connected to the vehicle body, and the tire anti-slip device is arranged on the vehicle body.

[0029] The tire anti-slip method, the tire anti-slip device and the vehicle of the present application can spray gas to the road surface in front of the tire running direction, generate bubbles on the wet and slippery ground to be contacted by the tire, form a liquid bridge on the contact surface, form a "solid-liquid-gas" three-phase interface, and then generate a capillary force. The capillary force causes the liquid to generate adsorption force in the interface, improves the actual friction coefficient of the road surface, enhances the friction force, and then enhances the tire grip, thereby significantly reducing the risk of tire slip. By spraying gas to the road surface contacted by the tire, the friction coefficient of the road surface is instantaneously improved, the friction force between the tire and the road surface is rapidly increased, the braking distance can be significantly shortened in a very short distance, and the side slip is suppressed. The vehicle obtains significant improvement in grip at the initial stage of emergency braking or side slip, effectively reduces the risk of vehicle slip or loss of control caused by insufficient friction in muddy, wet, icy or oily road conditions, overcomes the defects of lagging reaction and untimely adjustment in the traditional technology, and can significantly improve the stability and safety of driving. The tire anti-slip device can be externally arranged on the vehicle chassis or the outside of the wheel, has strong universality, and has low manufacturing and maintenance costs. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which several embodiments of the present disclosure are shown by way of example, and wherein like or corresponding reference numerals refer to like or corresponding parts throughout. In the drawings:

[0031] Figure 1 is a flowchart of the tire anti-slip method of one embodiment;

[0032] Figure 2 is a test diagram of the influence of the medium being gas on the interfacial friction coefficient in an underwater environment.

[0033] Figure 3 is a schematic diagram of a vehicle of one embodiment.

[0034] The reference numerals are as follows:

[0035] 1, tire; 2, vehicle body; 10, jet assembly; 110, nozzle; 120, adjustable tube; 130, quick connector; 140, jet valve; 20, compression pump; 30, gas tank; 40, monitoring member; 50, controller; 60, magnetic seat. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in combination with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present disclosure.

[0037] The specific embodiments of the present disclosure will be described in detail below in combination with the drawings.

[0038] Embodiment one

[0039] With reference to Figure 1 , an embodiment of the present disclosure provides a tire anti-skid method, comprising the following steps:

[0040] S100: spraying gas to the road surface in front of the tire 1 running direction. The gas with weight greater than or equal to air can be selected, such as one or more of air, nitrogen, carbon dioxide or automobile exhaust, wherein air is ubiquitous and low in cost; automobile exhaust can be collected at any time during travel; nitrogen is not prone to expansion and contraction when the temperature changes. With reference to Figure 2 , with the increase of gas flow, the friction force shows a trend of continuous increase. When the tire 1 advances, the gas is sprayed on the road surface in front of the tire 1, which will be rolled over; when the tire 1 retreats, the gas is sprayed on the road surface behind the tire 1, which will be rolled over. The front side and the back side are referred to the vehicle head, the side of the tire 1 close to the vehicle head is the front side, and vice versa.

[0041] Optionally, in one embodiment, before spraying gas to the road surface in front of the tire 1 running direction, the gas with weight not less than air is compressed to 3bar-5bar, and the compressed gas is then sprayed to the road surface in front of the tire 1 running direction. The high-pressure gas is sprayed to the tire 1 contact area with the ground, instantaneously changing the pressure distribution and lubrication state of the contact interface, so as to complete the rapid improvement of the friction coefficient in milliseconds.

[0042] S200: The gas forms bubbles on the road surface, increasing the friction coefficient between the tire 1 contact surface and the road surface. The gas injection device is arranged on the vehicle and moves with the tire 1, and the gas is always injected onto the road surface that the tire 1 is about to roll over. The tire 1 can roll on the road surface that has been injected with gas and formed with bubbles. Compared with a wet and slippery road surface, the "solid-liquid-gas" three-phase interface generates capillary force, instantaneously increases the road surface friction coefficient, and further enhances the tire 1 grip, thereby significantly reducing the tire 1 slip risk. Referring to Figure 2 , with the increase of gas flow, the friction force shows a trend of continuous increase. Alternatively, in one embodiment, the gas flow is released along the tire 1 running track at a speed of 10-100 ml / s in continuous or pulse mode. In this way, bubbles can be continuously formed on the road surface, and the tire 1 movement can be better stabilized.

[0043] The tire slip prevention method of the present application sprays gas to the road surface in front of the tire 1 running direction, so that bubbles are generated on the wet and slippery ground that the tire 1 is about to contact. The contact surface thus forms a liquid bridge, forming a "solid-liquid-gas" three-phase interface, generating capillary force, improving the actual road surface friction coefficient, enhancing the friction force, and further enhancing the tire 1 grip, thereby significantly reducing the tire 1 slip risk. By spraying gas to the road surface that the tire 1 contacts, the road surface friction coefficient is instantaneously increased, the friction force between the tire 1 and the road surface is quickly increased, the braking distance can be significantly shortened in a very short distance, and the side slip is suppressed. The vehicle obtains significant grip improvement at the initial stage of emergency braking or side slip, effectively reduces the risk of vehicle slip or loss of control due to insufficient friction on slippery road conditions such as mud, wetness, ice, snow or oil stains, overcomes the defects of lagging reaction and untimely adjustment in traditional technology, and can significantly improve the stability and safety of driving.

[0044] Referring to Figure 1 , in one embodiment, before the step of spraying gas to the road surface in front of the tire 1 running direction, the following steps are further included:

[0045] S10: Obtain the road condition or tire 1 state or obtain the vehicle in a side slip or braking state. Different functional sensors can be used to monitor and analyze various environmental conditions in real time.

[0046] Optionally, in one embodiment, the step of acquiring the road condition specifically comprises: S110: acquiring a road surface humidity value greater than a rated humidity value. When the humidity value is greater than the rated humidity value, it is determined that the road surface is in a wet and slippery state. In other embodiments, the step of acquiring the road condition can also comprise: S120: acquiring a road surface water film value greater than a rated water film value. When the first water film value is greater than the first rated water film value, it is determined that the road surface is in a wet and slippery state. Alternatively, the road surface humidity value and the water film value are combined; when the humidity value is greater than the rated humidity value and the water film value is greater than the rated water film value, it is determined that the road surface is in a wet and slippery state. The rated humidity value and the rated water film value can be set according to different regions or different seasons. The wet and slippery road surface, such as in rainy weather, has low friction between the tire 1 and the road surface, and is prone to skidding. In this case, the humidity sensor can detect the presence of water on the road surface and monitor the thickness of the water film and the degree of wetness in real time.

[0047] Optionally, in one embodiment, the step of acquiring the road condition specifically comprises: S130: acquiring a road surface temperature value lower than a rated temperature value and identifying that the road surface has snow or ice. The temperature sensor can detect a sharp drop in temperature. When the road surface temperature is less than the rated temperature value and it is identified that the road surface has snow or ice, it is determined that the road surface is an icy and snowy road surface. The icy and snowy road surface has low friction between the tire 1 and the road surface, and is prone to skidding. The optical sensor can also scan the texture and state of the road surface in real time through infrared technology.

[0048] Optionally, in one embodiment, the step of acquiring the tire 1 state specifically comprises: S140: acquiring a contact pressure value of the road surface to the surface of the tire 1 less than a rated pressure value. In other embodiments, the step of acquiring the tire 1 state specifically comprises: S150: acquiring a torque value received by the tire 1 less than a rated torque value. When the contact pressure value is less than the rated pressure value or the torque value is less than the rated torque value, it can be preliminarily determined that the friction of the tire 1 is too small; or when the pressure value is less than the rated pressure value and the torque value is less than the rated torque value, it can be more accurately determined that the friction of the tire 1 is too small. When the tire 1 receives too little friction, the risk of tire 1 skidding increases. In other embodiments, the step of acquiring the tire 1 state specifically comprises acquiring a wheel speed difference of the tire 1 exceeding a rated difference value. When the wheel speed difference of the tire 1 exceeds the rated difference value, the vehicle is prone to problems such as shaking, deviation, and the like, the vehicle needs to be braked urgently, and the risk of tire 1 skidding increases.

[0049] S20: According to the road condition or tire 1 condition or the vehicle is in a side slip or braking state, send the jet command to spray gas to the road surface in front of the tire 1 or multiple tires 1. According to the road condition or tire 1 condition or the vehicle is in a side slip or braking state, the controller 50 can automatically determine that the tire 1 has a high risk of slipping, send the jet command to spray gas to the road surface in front of the tire 1 or multiple tires 1, control the jet equipment of single or multiple tires 1 as needed, so that the vehicle can obtain significant improvement of the ground adhesion in the initial stage of emergency braking or side slip, realize more balanced lateral stability and steering performance, and thus improve the adaptability of the tire 1.

[0050] Embodiment two

[0051] With reference to Figure 3 , an embodiment of the present application provides a tire anti-skid device which can be applied to the tire anti-skid method of any of the above embodiments. The tire anti-skid device comprises a jet assembly 10, a compression pump 20, a gas storage tank 30, a controller 50 and a monitoring member 40, the controller 50 is electrically connected with the jet assembly 10, the compression pump 20 and the monitoring member 40, the jet assembly 10, the gas storage tank 30 and the compression pump 20 are connected in sequence, and the nozzle 110 of the jet assembly 10 is used for spraying gas to the road surface in front of the tire 1.

[0052] The tire anti-slip device of the embodiment can be externally placed on the vehicle chassis or the outside of the wheel, has strong versatility, and has low manufacturing and maintenance costs. The tire anti-slip device is a tire friction increasing system integrating a gas source, precise control, and directional gas injection. The system quickly provides working gas by combining a vehicle-mounted gas compression pump 20 and a gas storage tank 30. The jet direction of the gas injection assembly 10 is adjusted in advance, so that the nozzle 110 is directed at the road surface in front of the tire 1 in the direction of travel. The compression pump 20 is started, air is pressurized to 3-5 bar, and is stored in the gas storage tank 30. The monitoring member 40 monitors the road conditions or the tire 1 state or the vehicle side slip or braking state in real time and transmits it to the controller 50. When the controller 50 such as an ECU obtains a road condition, vehicle condition, side slip, or braking threshold value signal, it immediately triggers a gas injection instruction to drive the gas injection assembly 10 to quickly open and close, achieving stable high-pressure pulse injection. By injecting gas into the road surface in front of the tire 1 in the direction of travel, bubbles are generated on the wet and slippery ground that the tire 1 is about to contact, a liquid bridge is formed on the contact surface, a "solid-liquid-gas" three-phase interface is formed, capillary force is generated, the actual friction coefficient of the road surface is improved, the friction force is enhanced, and the tire 1 grip is enhanced, thereby significantly reducing the risk of tire 1 slip. By injecting gas into the road surface contacted by the tire 1, the road surface friction coefficient is instantaneously improved, the friction force between the tire 1 and the road surface is quickly increased, the braking distance can be significantly shortened in a very short distance, and the tire 1 slip is inhibited. The vehicle obtains significant improvement in grip at the initial stage of emergency braking or side slip, effectively reduces the risk of vehicle slip or loss of control due to insufficient friction on slippery roads such as muddy, wet, icy, or oily roads, overcomes the defects of lagging adjustment response and timeliness in traditional technologies, and can significantly improve the stability and safety of driving.

[0053] In one embodiment, the tire anti-slip device further includes a magnetic seat 60, and the compression pump 20 and the gas storage tank 30 are arranged on the magnetic seat 60. The magnetic seat 60 is used to be adsorbed on the vehicle base or side. A detachable magnetic seat 60 is designed on the outer shell of the compression pump 20 / gas storage tank 30. High-strength neodymium iron boron magnets (pulling force ≥ 50 N) are used, and a non-slip rubber pad is covered on the bottom surface. The gas injection assembly, the compression pump 20, and the gas storage tank 30 are adsorbed on the automobile base / side together, are installed quickly and stably, and do not need additional supports or clamps. During use, the working point can be moved, positioned, and locked in real time.

[0054] In one embodiment, the jetting assembly 10 includes a nozzle 110, an adjustable tube 120, a quick connector 130, and a jetting valve 140, which are connected in sequence, the jetting valve 140 is connected with the quick connector 130 for controlling the on-off of the quick connector 130. The nozzle 110 is aimed at the contact surface with a pitch angle of 15°-30° through the adjustable tube 120. When the ECU triggers the jetting command, the gas path is stabilized to the specified pressure in advance, and then the gas flow is released in a continuous or pulsed mode at a rate of 10-100 ml / s. The jetting gas forms a continuous bubble on the wet and slippery road surface, thereby building a stable solid-liquid-gas three-phase interface with the water film on the tire 1 and the road surface, which can quickly improve the friction performance of the tire 1 and the ground. Without modification of the tire 1 body, only the nozzle 110, the pipeline, the valve, and the electronic control unit are arranged outside the suspension or the chassis, and are deeply integrated with the ABS / ESP system through the CAN bus, realizing universal installation, rapid response, and low-cost maintenance.

[0055] Optionally, the outlet opening angle of the nozzle 110 is 10°-15° to adjust the range of the jetting gas. Optionally, the outlet diameter of the nozzle 110 is 2.0 mm, 2.5 mm, etc. The quick-change nozzle 110 diameter is matched with the ECU pulse width modulation, which can change the flow rate and jet beam shape in real time according to the tread width, vehicle speed, humidity, and other working conditions, thereby obtaining better wheel-road adhesion performance. Further, the nozzle 110 is an integral hard alloy piece, about 30 mm long, and the inlet diameter is 2.0 mm, 2.5 mm, etc. 2.0 mm, 2.5 mm, etc. The quick-change nozzle 110 diameter is matched with the ECU pulse width modulation, which can change the flow rate and jet beam shape in real time according to the tread width, vehicle speed, humidity, and other working conditions, thereby obtaining better wheel-road adhesion performance. Further, the nozzle 110 is an integral hard alloy piece, about 30 mm long, and the inlet diameter is 2.0 mm, 2.5 mm, etc. The throttle throat The nozzle 110 is a hexagonal threaded seat with a locking nut, which can be quickly disassembled, positioned, and adjusted in angle without tools, and can control the jet flow quickly and accurately.

[0056] Optionally, the adjustable tube 120 includes 8-20 series-connected aluminum alloy or nylon knurled units, each of which has a spherical boss and a spherical cavity at both ends, and the adjacent two knurled units are rotatably connected and sealed by O-rings. The adjustable tube 120 connected with the nozzle 110 can be a universal knurled tube, which is composed of 8-20 series-connected aluminum alloy or nylon knurled units with an outer diameter of 20 mm and a length of 15 mm. Each knurled unit has a spherical boss and a spherical cavity at both ends, which are fastened by an embedded fluororubber O-ring, ensuring high-pressure (≤20 bar) airtightness and allowing free bending in any direction within a three-dimensional space by about ±45°. One end of the knurled tube is connected with the jetting valve 140 through the quick connector 130, and the other end locks the nozzle 110. The threaded seat of the nozzle 110 is matched with the knurled tube, and the tapered matching surface is self-sealing when locked. After loosening, the nozzle 110 can be adjusted in angle by ±10° along the thread, and the overall repositioning can be achieved by rotating the first few knurled units.

[0057] Optionally, the injection valve 140 adopts an electromagnetic injection valve, and the electromagnetic valve opening and closing time is less than or equal to 20 ms. In combination with the ABS / ESP signal of the ECU, the jet flow output can be completed in the first period of the occurrence of the slip or emergency braking. The traditional pneumatic mechanical valve is generally greater than 80 ms. The direct-acting valve body has a size of about 40*20*30 mm, a valve core gap of micron level, a response time of less than or equal to 20 ms, and an O-shaped sealing ring with pressure resistance. The lower end of the valve body is an M8 quick plug 130, which is directly connected to the universal bamboo joint pipe to quickly control the on-off of the nozzle 110.

[0058] Optionally, the compression pump 20 adopts an electric reciprocating piston pump with a volume of about 200*150*150 mm, which can compress the ambient air to 3-5 bar. The pump has a power management function and can be directly powered by the vehicle battery. The pump outlet is connected to a small-capacity gas storage tank 30. The built-in safety valve and mechanical pressure gauge ensure timely air replenishment and stable output pressure during intermittent injection.

[0059] The working principle of the tire anti-slip device in at least one of the above embodiments is as follows: the magnetic seat 60 is adsorbed on the metal surface of the vehicle / base, the bamboo joint pipe is manually bent and the nozzle 110 locking nut is tightened, the jet direction is adjusted, the compression pump 20 is started, the gas is pressurized to 3-5 bar and stored in the tank, when the ECU obtains the road surface state, tire 1 state, vehicle braking or side slip threshold value signal, the gas injection instruction is triggered immediately, the electromagnetic valve is energized to drive, and the opening and closing are completed within 20 ms to realize stable high-pressure pulse injection. High-pressure gas such as air, nitrogen, etc. is transmitted from the gas storage tank 30 to the first bamboo joint unit to the lining pipe to the end nozzle 110; the gas is accelerated at the conical throttling throat, shaped after the diffusion section, and output as uniform and concentrated jet flow. The injection direction and height can be adjusted by manually adjusting the angle of the bamboo joint pipe and fixed at the locking nut to realize accurate construction of the solid-liquid-gas three-phase interface of the tire 1 contact area.

[0060] In one of the embodiments, the monitoring member 40 includes a humidity sensor for monitoring the humidity of the road surface. The humidity sensor can be arranged on the chassis of the vehicle body 2 for monitoring the humidity of the road surface. The humidity sensor is integrated into the chassis, which continuously monitors the humidity level of the road surface by detecting the moisture content in the air and the wet and slippery degree of the road surface, and then identifies the presence of water, ice or snow. The controller 50 obtains the road surface humidity value monitored by the humidity sensor, and when the humidity value is greater than the rated humidity value, the control of the electromagnetic valve can be triggered, and the gas injection assembly 10 injects a corresponding volume of gas to enhance the grip in wet and slippery conditions and to enhance the friction between the tire 1 and the road surface to adapt to the road environment.

[0061] Optionally, in one embodiment, the monitoring member 40 includes an optical sensor for identifying the texture and condition of the road surface. The optical sensor is arranged on the chassis of the vehicle body 2 for identifying the texture and condition of the road surface. The optical sensor employs advanced infrared technology to scan the texture and condition of the road surface in real time, identify different road surface materials, cracks, potholes and other irregularities, especially at night or in low light conditions, detect some road features that are difficult to detect with the naked eye. The optical sensor does not need to directly contact the road surface, and is suitable for road condition detection at high speed. The controller 50 analyzes the road condition data and sprays gas to the road surface at slippery road sections to adapt to different road conditions, thereby optimizing the handling performance and comfort of the vehicle.

[0062] Optionally, in one embodiment, the monitoring member 40 includes a temperature sensor for monitoring the temperature of the road surface. The temperature sensor is arranged on the chassis of the vehicle body 2 for monitoring the temperature of the road surface. The temperature sensor can accurately measure the temperature of the road surface under various environmental conditions, and for complex road conditions, the temperature sensor can help identify potential ice and snow conditions by sensing subtle changes in temperature; combined with the humidity data detected by the humidity sensor, the controller 50 can more accurately determine the road condition. When the temperature drops to near freezing, the controller 50 controls the gas output of the gas injection assembly 10 to automatically adjust the friction of the tire 1 to prevent skidding and ensure sufficient grip on icy and snowy road surfaces.

[0063] Optionally, in one embodiment, the monitoring member 40 includes a pressure sensor for monitoring the contact pressure of the tire 1. The pressure sensor is arranged on the surface of the tire 1 for monitoring the contact pressure of the tire 1. The pressure sensor is installed in the area where the tire 1 contacts the road surface, and can monitor the contact pressure of the tire 1 in real time, which is used to evaluate the friction between the tire 1 and the ground, and feedback to the controller 50 to make necessary adjustments to the tire 1 friction to maintain appropriate friction levels under slippery driving conditions, ensuring the stability and safety of the vehicle.

[0064] Optionally, in one embodiment, the monitoring member 40 includes a torque sensor for monitoring the torque received by the tire 1. The torque sensor is arranged in the middle of the hub of the tire 1 for monitoring the torque received by the tire 1. The torque sensor monitors the torque changes received by the tire 1 in real time, evaluates the friction between the tire 1 and the ground, and automatically controls the on-off of the gas injection assembly 10 to maintain appropriate friction levels under slippery driving conditions, ensuring the stability and safety of the vehicle.

[0065] The tire anti-skid device in the above embodiments is tested after assembly. The initial inflation and pressure test: static pressure 5 bar, pressure retention 1 h, leakage rate ≤1%. The reaction speed test of the electromagnetic valve: electromagnetic valve pulse 1000 times, on-off time ≤20 ms. The function test of the universal bamboo joint pipe: 360° bending 50 times, joint torque attenuation ≤5%. The test of the jet function: jet distance ≥0.8 m at 3 bar working pressure, jet angle error ≤3°. Through the advance test, the high-precision assembly of the nozzle 110, the universal bamboo joint pipe, the electromagnetic valve, the compression pump 20, the magnetic seat 60 and other modules is ensured, so that the air jet assembly 10 can maintain reliable air tightness in the range of 0-20 bar; the adjustable pipe 120 provides ±45° three-dimensional adjustment, and the threaded seat provides ±10° fine adjustment, which ensures that the jet flow can realize fast, accurate and high-pressure pulse jetting on the contact area of the tire 1 during vehicle driving, and improves the adhesion of the wheel-road interface and the vehicle stability under wet and slippery or sudden braking conditions. Through the combination of data of various sensors such as humidity, temperature and pressure, the electromagnetic valve is controlled to jet air in real time, so as to make optimal adjustment for different road conditions such as wetness, mud, ice and snow, and realize active intervention on the wheel-road interface; it can effectively improve the grip of the tire 1 on various road surfaces, enhance the stability and safety of the vehicle, and ensure that the driver obtains a good control experience in the changing environment. The tire anti-skid device reduces the risk of slipping or losing control caused by insufficient friction, and overcomes the defects of reaction lag and untimely adjustment in traditional technology. The parts of the tire anti-skid device can be made of mature technology, and the materials and technology are generally available, and the manufacturing cost is low; the assembly is modular, the number of bamboo joints or the caliber of the nozzle 110 can be increased or replaced as needed, which reduces the inventory and iteration cost, and is significantly superior to the existing technical solutions in terms of angle adjustment range, assembly and disassembly efficiency, sealing pressure resistance, response speed and manufacturing cost, and greatly improves the safety, stability and economy of the vehicle in extreme road conditions.

[0066] Embodiment three

[0067] With reference to Figure 1 and Figure 2 , an embodiment of the present application provides a vehicle, comprising a vehicle body 2, a tire 1 and a tire anti-skid device according to any one of the above embodiments, the tire 1 is connected with the vehicle body 2, and the tire anti-skid device is arranged on the vehicle body 2.

[0068] The vehicle of the present embodiment is equipped with the tire anti-slip device of any one of the above embodiments, and can implement the tire anti-slip method of any one of the above embodiments. The tire anti-slip device sprays gas in front of the tire 1 in the direction of travel, generates bubbles on the wet and slippery ground that the tire 1 is about to contact, and thus forms a liquid bridge on the contact surface, forms a "solid-liquid-gas" three-phase interface, generates capillary force, improves the actual friction coefficient of the road surface, enhances the friction, and further enhances the tire 1 grip, thereby significantly reducing the risk of tire 1 slip. By spraying gas on the road surface contacted by the tire 1, the road surface friction coefficient is instantaneously improved, the friction between the tire 1 and the road surface is rapidly increased, and the braking distance can be significantly shortened in a very short distance and the side slip is suppressed. The vehicle obtains significant improvement in grip at the initial stage of emergency braking or side slip, effectively reduces the risk of vehicle slip or loss of control due to insufficient friction on slippery roads such as muddy, wet, icy or oily roads, overcomes the defects of lagging adjustment response and timeliness in traditional technology, and can significantly improve the stability and safety of driving.

[0069] To improve the dry friction and adhesion between the tire 1 and the ground, the prior art sprays chemical friction enhancers such as polymer coatings, nanoparticles or fine sand salt mixtures on the road surface, which not only has high cost, but also has poor sustainability, and the friction enhancement effect can only be maintained for tens of meters to hundreds of meters, and cannot cover long distances or multiple emergency braking requirements. The chemical agents or sand salt can easily cause corrosion on the road and vehicle parts, and bring secondary maintenance and environmental burden. The tire anti-slip method, tire anti-slip device and vehicle of at least one of the above embodiments instantaneously change the pressure distribution and lubrication state of the contact interface by directional spraying of high-pressure gas on the contact area between the tire 1 and the ground, thereby rapidly improving the friction coefficient in milliseconds, without modifying the tire 1 body, and using an external gas source and a spraying assembly to "point-to-point" gas injection as needed, so that the vehicle obtains significant improvement in grip at the initial stage of emergency braking or side slip. The device is arranged on the outside of the chassis or wheels, has strong universality, low manufacturing and maintenance cost, and can rapidly respond to various road conditions such as rain, snow, mud, and can adjust the friction of the tire 1 on one side or multiple sides as needed, to achieve more balanced lateral stability and steering performance, thereby improving the adaptability of the tire 1.

[0070] In the above description of the present specification, unless otherwise explicitly specified and limited, the terms "fixed", "mounted", "connected" or "linked" and the like should be understood in a broad sense. For example, as to the term "connected", it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or it can be internal communication or interaction relationship between two elements. Therefore, unless otherwise explicitly limited in the present specification, those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0071] According to the above description of the present specification, those skilled in the art can also understand that the terms used such as "upper", "lower", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "center", "longitudinal", "transverse", "clockwise" or "counterclockwise" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of the present specification, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not explicitly or implicitly indicate or suggest that the device or element involved must have the particular orientation, be constructed and operated in a particular orientation, and therefore the above orientation or positional relationship terms cannot be understood or interpreted as a limitation on the present application.

[0072] In addition, the terms "first" or "second" and the like used in the present specification are terms used to refer to numbers or ordinal numbers and are used only for the purpose of distinguishing a certain component from another component with a similar or related function for descriptive purposes, and cannot be understood as explicitly or implicitly indicating the relative importance of the referred component or implying the specified number of the technical features. Therefore, the features defined with "first" or "second" can include at least one of the features, explicitly or implicitly.

[0073] Although the present application has been shown and described with respect to several embodiments thereof, it will be apparent that equivalents, substitutes and modifications will occur to others skilled in the art without departing from the spirit and technical scope of the present application. It is to be understood that various alternatives to the embodiments of the present application described herein can be employed in practicing the present application. The appended claims are intended to define the scope of the present application and thus cover any and all equivalents or alternatives falling within the scope of the claims.

Claims

1. A method of preventing tire slippage, characterized by, The method comprises the following steps: Spraying gas to the road surface in front of the tire running direction; The gas forms bubbles on the road surface, increasing the friction coefficient between the tire contact surface and the road surface.

2. The tire slip prevention method according to claim 1, characterized by, Before the step of spraying gas to the road surface in front of the tire running direction, the method further comprises the following steps: Obtaining road conditions or tire state or obtaining that the vehicle is in a side slip or braking state; According to the road conditions or tire state or obtaining that the vehicle is in a side slip or braking state, sending a gas spraying instruction to spray gas to the road surface in front of the tire running direction.

3. The method of claim 2, wherein The step of obtaining road conditions specifically comprises: Obtaining that the road surface humidity value is greater than the rated humidity value, and / or, obtaining that the road surface water film value is greater than the rated water film value; and / or, obtaining that the road surface temperature value is lower than the rated temperature value and identifying that the road surface has accumulated snow or ice.

4. The tire slip prevention method according to claim 2, characterized by, The step of obtaining tire state specifically comprises: Obtaining that the contact pressure value of the road surface to the tire surface is less than the rated pressure value; and / or, obtaining that the torque value received by the tire is less than the rated torque value; and / or, obtaining that the tire wheel speed difference exceeds the rated difference value.

5. Tyre slip prevention method according to any one of claims 1 to 4, characterized in that, The step of spraying gas to the road surface in front of the tire running direction specifically comprises: Releasing gas flow along the tire running track at a speed of 10-100 ml / s in continuous or pulse mode.

6. Tyre slip prevention method according to any one of claims 1 to 4, characterized in that, Before the step of spraying gas to the road surface in front of the tire running direction, the method further comprises: Compressing the gas with a weight not less than air to 3-5 bar.

7. The tire anti-slip method according to any one of claims 1-4, wherein The gas comprises one or more of air, nitrogen, carbon dioxide or automobile exhaust gas.

8. A tire traction device, comprising: The method comprises a gas spraying assembly, a compression pump, a gas storage tank, a controller and a monitoring device, the controller is electrically connected with the gas spraying assembly, the compression pump and the monitoring device, the gas spraying assembly, the gas storage tank and the compression pump are connected in sequence, and a nozzle of the gas spraying assembly is used for spraying gas to the road surface in front of the tire running direction.

9. Tyre chain device according to claim 8, characterized in that The monitoring device comprises a humidity sensor for monitoring the humidity of the road surface; And / or, the monitoring device comprises an optical sensor for identifying the texture and state of the road surface; And / or, the monitoring device comprises a temperature sensor for monitoring the temperature of the road surface; And / or, the monitoring device comprises a pressure sensor for monitoring the contact pressure of the tire; And / or, the monitoring device comprises a torque sensor for monitoring the torque received by the tire.

10. Tyre chain device according to any one of claims 8-9, characterized in that The gas spraying assembly comprises a nozzle, an adjustable pipe, a quick connector and a spraying valve, the nozzle, the adjustable pipe, the quick connector and the gas storage tank are connected in sequence, the spraying valve is connected with the quick connector, and is used for controlling the on-off of the quick connector.

11. Tyre chain device according to claim 10, characterized in that The outlet opening angle of the nozzle is 10-15°, and / or the adjustable pipe comprises 8-20 series-connected bamboo joint units made of aluminum alloy or nylon, each of the two ends of the bamboo joint unit has a spherical boss and a spherical cavity, and adjacent two bamboo joint units are rotatably connected and sealed by an O-shaped sealing ring.

12. Tyre chain device according to any of claims 8-9, characterized in that Further comprising a magnetic seat, the compression pump and the gas storage tank are arranged on the magnetic seat, and the magnetic seat is used for being adsorbed to the vehicle base or side.

13. A vehicle characterized by comprising: The vehicle body, the tire and the tire anti-skid device of any one of claims 8-12 are connected, and the tire anti-skid device is arranged on the vehicle body.

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