Vehicle brake cooling device, method and vehicle

Abstract

This invention relates to the field of vehicles, specifically to a vehicle brake cooling device, method, and vehicle. The cooling device includes: a storage system comprising an air storage device and a water storage device, wherein the air storage device is connected to the water storage device via a pressure regulating valve, and the water storage device is equipped with a water level detector capable of detecting the water level in the water storage device; an actuation system comprising water outlet pipes and spray nozzles, wherein one end of each water outlet pipe is provided with several spray nozzles aimed at the vehicle wheels, and the other end of each water outlet pipe is provided with a solenoid valve, and two solenoid valves are connected to the water storage device via a three-way valve; and a control system comprising a temperature sensor and a controller, wherein the temperature sensor can non-contactly detect the temperature information of the brake pads / brake wheels of the wheels with the greatest brake fade performance, the controller can control the opening and closing of the solenoid valves based on the temperature information, and the controller can control the opening and closing of the pressure regulating valve based on the water level information, thereby achieving automated temperature monitoring and vehicle cooling start-up.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and in particular to a vehicle brake cooling device, method, and vehicle. Background Technology

[0002] Currently, few large vehicles on the market are equipped with devices that can monitor the temperature of the braking system in real time and accurately. Especially in critical components such as brake pads and brake discs, most rely on the user's experience to manually cool them down, which cannot be done in a timely manner. Over time, this can easily accelerate the aging of vehicle braking system components. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies where manual cooling cannot achieve timely cooling and easily accelerates the aging of vehicle braking system components, and to provide a vehicle brake cooling device, method and vehicle.

[0004] In a first aspect, the present invention provides a vehicle brake cooling method, comprising the following steps:

[0005] S1: Identify the wheel with the greatest brake fade performance in the vehicle.

[0006] S2: Install a vehicle brake cooling system on the vehicle, wherein the vehicle brake cooling system includes:

[0007] A storage system includes a gas storage device and a water storage device. The gas storage device is connected to the water storage device through a pressure regulating valve. A water level detector is installed in the water storage device, and the water level detector can detect the water level of the water storage device.

[0008] The action system includes water outlet pipelines and water nozzles. Each water outlet pipeline has several water nozzles at one end, which are aimed at the vehicle wheels. Each water outlet pipeline has a solenoid valve at the other end, and two solenoid valves are connected to the water storage device through a three-way valve.

[0009] The control system includes a temperature sensor and a controller. The temperature sensor can detect the temperature information of the wheel brake pads / brake wheels with the greatest brake fade performance in a non-contact manner. The controller can control the opening and closing of the solenoid valve according to the temperature information, and the controller can control the opening and closing of the pressure regulating valve according to the water level information.

[0010] S3: When the water level information is higher than the first threshold, the controller controls the opening of the pressure regulating valve, and the gas storage device pushes the water in the water storage device to the three-way valve;

[0011] When the temperature information is higher than the second threshold, the controller controls the opening of the solenoid valve, and the water stored in the three-way valve is sprayed onto the vehicle wheels through the water outlet pipe and the spray nozzle.

[0012] This invention first identifies the wheel with the greatest brake fade performance in a vehicle. Then, using a temperature sensor, it detects the temperature of the brake pads / wheel of this wheel in a non-contact manner. The detected temperature information is then used to further determine the activation and deactivation of the braking system. Therefore, compared to existing methods that place temperature sensors on all vehicle wheels, this invention reduces the number of temperature sensors required, thus lowering costs. Furthermore, compared to existing methods that randomly place temperature sensors, this invention places the temperature sensors on the wheel with the greatest brake fade performance, providing a more accurate reflection of the wheel's highest temperature and enabling more timely brake cooling.

[0013] This invention collects water level information from a water storage device by setting a water level detector. When the water level is higher than a first threshold, the controller opens the pressure regulating valve, and the gas storage device pushes the water in the water storage device to the three-way valve. This allows a large amount of water to be stored in the three-way valve and pipeline in advance. Then, when the temperature is higher than a second threshold, the controller opens the solenoid valve, and the water stored in the three-way valve is sprayed onto the vehicle wheels more quickly through the water outlet pipeline and spray nozzle, thereby enabling more timely brake cooling.

[0014] Preferably, in step S3, the water stored in the three-way valve is sprayed through the water outlet pipe and nozzle only onto the wheel with the greatest brake fade performance. The wheel with the greatest brake fade performance is the wheel of the vehicle that most needs cooling. In some embodiments, placing the water pipe and nozzle only near the wheel with the greatest brake fade performance and spraying only onto that wheel can reduce costs to some extent.

[0015] Preferably, in step S3, the water stored in the three-way valve is sprayed onto all wheels of the vehicle through the water outlet pipe and the spray nozzle. In some embodiments, the water outlet pipe and the spray nozzle are located at all wheels. When the temperature of the brake pad / brake wheel with the greatest brake fade performance is detected to be higher than a second threshold, the water outlet pipe and the spray nozzle promptly spray water onto all wheels of the vehicle, which can further improve the comprehensiveness of vehicle cooling and improve driving safety.

[0016] Preferably, the temperature sensor is an infrared sensor, which can better achieve non-contact detection.

[0017] Preferably, in S1, the wheel with the greatest brake thermal fade performance is determined through a brake thermal fade performance comparison test.

[0018] In a second aspect, the present invention provides a vehicle brake cooling device, comprising:

[0019] A storage system includes a gas storage device and a water storage device. The gas storage device is connected to the water storage device through a pressure regulating valve. A water level detector is installed in the water storage device, and the water level detector can detect the water level of the water storage device.

[0020] The action system includes water outlet pipelines and water nozzles. Each water outlet pipeline has several water nozzles at one end, which are aimed at the vehicle wheels. Each water outlet pipeline has a solenoid valve at the other end, and two solenoid valves are connected to the water storage device through a three-way valve.

[0021] The control system includes a temperature sensor and a controller. The temperature sensor can non-contactly detect the temperature information of the brake pads / brake wheels of the wheels with the greatest brake fade performance. The controller can control the opening and closing of the solenoid valve based on the temperature information, and the controller can control the opening and closing of the pressure regulating valve based on the water level information.

[0022] The air storage device of this invention is directly connected to the water storage device with a pressure regulating valve, which can promptly ensure the air pressure of the water storage device and avoid the problem of insufficient air pressure during continuous long-term use. This invention uses a non-contact temperature sensor, avoiding direct installation on the brakes and reducing the impact of vibration and harsh conditions on the temperature sensor's detection accuracy. This invention places the temperature sensor at the wheel where brake fade is greatest, enabling a more accurate reflection of the actual maximum wheel temperature and more timely brake cooling.

[0023] This invention collects water level information from a water storage device by setting a water level detector. When the water level is higher than a first threshold, the controller opens the pressure regulating valve, and the gas storage device pushes the water in the water storage device to the three-way valve. This allows a large amount of water to be stored in the three-way valve and pipeline in advance. Then, when the temperature is higher than a second threshold, the controller opens the solenoid valve, and the water stored in the three-way valve is sprayed onto the vehicle wheels more quickly through the water outlet pipeline and spray nozzle, thereby enabling more timely brake cooling.

[0024] Preferably, if the water level falls below a third threshold, the water level detector and / or the controller can issue an alarm. This alerts staff to replenish the water in the storage device, ensuring the system can dispense water promptly.

[0025] Preferably, the pressure regulating valve is equipped with a check valve and a filter. The pressure regulating valve controls the pressure, preventing overpressure from causing danger and affecting service life. The filter element in the pressure regulating valve cleans the air medium, ensuring the operating conditions and lifespan of the pipeline and nozzles.

[0026] In a third aspect, the present invention provides a vehicle including any of the aforementioned vehicle brake cooling devices, which can cool the brakes in a timely manner and improve driving safety.

[0027] Preferably, the spray nozzle is aimed only at the wheel where the vehicle's brakes have the greatest heat fade performance.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] This invention first identifies the wheel with the greatest brake fade performance in a vehicle. Then, using a temperature sensor, it detects the temperature of the brake pads / wheel of this wheel in a non-contact manner. The detected temperature information is then used to further determine the activation and deactivation of the braking system. Therefore, compared to existing methods that place temperature sensors on all vehicle wheels, this invention reduces the number of temperature sensors required, thus lowering costs. Furthermore, compared to existing methods that randomly place temperature sensors, this invention places the temperature sensors on the wheel with the greatest brake fade performance, providing a more accurate reflection of the wheel's highest temperature and enabling more timely brake cooling.

[0030] This invention collects water level information from a water storage device by setting a water level detector. When the water level is higher than a first threshold, the controller opens the pressure regulating valve, and the gas storage device pushes the water in the water storage device to the three-way valve. This allows a large amount of water to be stored in the three-way valve and pipeline in advance. Then, when the temperature is higher than a second threshold, the controller opens the solenoid valve, and the water stored in the three-way valve is sprayed onto the vehicle wheels more quickly through the water outlet pipeline and spray nozzle, thereby enabling more timely brake cooling.

[0031] The gas storage device of the present invention is directly connected to the water storage device with a pressure regulating valve, which can ensure the gas pressure of the water storage device in a timely manner and avoid the problem of insufficient gas pressure during continuous long-term use. The present invention uses a non-contact temperature sensor, which avoids direct installation on the brake and reduces the impact of vibration and harsh conditions on the detection accuracy of the temperature sensor.

[0032] This invention enables automated temperature monitoring and vehicle cooling start-up through a storage system, an action system, and a control system, thereby improving vehicle driving safety. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a vehicle brake cooling device according to the present invention.

[0034] Figure 2 This is a schematic diagram of the controller described in this invention.

[0035] Figure 3 This is a schematic diagram of a semi-trailer train used in the comparative test of the brake thermal fade performance of the present invention.

[0036] Marked in the image:

[0037] 1-Air storage device, 2-Pressure regulating valve, 3-Water inlet, 4-Water storage device, 5-Water outlet, 6-Water outlet pipeline, 7-Water spray nozzle, 8-Quick-connector for air hose, 9-Filter, 10-Three-way valve, 11-Solenoid valve, 12-Controller, 121-Temperature display screen, 122-First wiring port, 123-Second wiring port, 124-Controller switch, 125-Sensor inlet, 13-Temperature sensor, 14-Vehicle power supply, 15-Safety valve, 16-Pressure gauge. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0039] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0040] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0041] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0042] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0043] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0044] Example 1

[0045] This invention provides a vehicle brake cooling method, comprising the following steps:

[0046] S1: Identify the wheel with the greatest brake fade performance in the vehicle.

[0047] In some implementations, the wheel with the greatest brake thermal fade performance can be determined through a brake thermal fade performance comparison test.

[0048] The testing system can consist of a vehicle train performance tester, a pedal force gauge, a multi-channel temperature recorder, thermocouples, a tire pressure gauge, and an electronic truck scale. Additionally, it may include a laptop computer and power supply equipment. The vehicle train performance tester primarily measures vehicle braking performance, including braking distance, average braking deceleration, and braking time; the pedal force gauge primarily measures the braking force applied to the brake pedal during braking; the multi-channel temperature recorder continuously collects and stores the temperature values ​​of the thermocouples; the thermocouples are used to measure the temperature of the brake discs and brake drums; the tire pressure gauge measures the tire pressure before the test; and the electronic truck scale measures the axle load of the test vehicle under both unloaded and fully loaded conditions.

[0049] Before testing, tire pressure gauges and electronic truck scales ensure that the tire pressure and axle load of the test vehicle meet technical requirements. The vehicle performance testing instrument can be installed on the upper part of the center console in the cab and can be fixed to the windshield using a high-suction suction cup. The pedal force gauge can be installed on the upper surface of the brake pedal. The multi-channel temperature recorder can be installed in the left-side storage box of the semi-trailer and secured with soft foam material. Thermocouples can be installed on the brake pads of both disc and drum brakes. Through holes are drilled in the pads, and the thermocouples are secured with spring-loaded copper sleeves to adjust for gaps caused by brake pad wear and ensure contact between the copper sleeve and the brake disc surface during measurement.

[0050] The experimental semi-trailer truck train consisted of a 6×4 tractor unit and a three-axle box semi-trailer. A schematic diagram of the experimental vehicles (including axle spacing) is shown below. Figure 3 As shown.

[0051] The thermal fade performance test method is as follows: The semi-trailer truck is braked at an initial speed of 60 km / h. When the speed drops to 30 km / h, the brakes are released. Then, it is accelerated to a stable speed of 60 km / h and braked again. When the speed drops to 30 km / h, the brakes are released. The test is repeated 20 times. Temperature data of the six brakes of the semi-trailer are continuously collected during the test.

[0052] The brake temperatures at the end of the full-load test of the truck train are shown in Table 1.

[0053] Table 1. Brake Temperature (°C) During Full-Load Test of Automobile Train

[0054]

[0055] As can be seen from Table 1, for semi-trailers using disc brakes, the left / right wheels of axle 1 are the wheels with the greatest brake fade performance; for semi-trailers using drum brakes, the left / right wheels of axle 3 are the wheels with the greatest brake fade performance.

[0056] S2: Install a vehicle brake cooling system on the vehicle, wherein the vehicle brake cooling system is as follows: Figure 1-2 As shown, it includes a storage system, an action system, and a control system.

[0057] The storage system includes a gas storage device 1 and a water storage device 4. The gas storage device 1 is connected to the water storage device 4 through a pressure regulating valve 2. The water storage device 4 is equipped with a water level detector, which can detect the water level of the water storage device 4.

[0058] The gas storage device 1 can be a gas cylinder or a gas storage box. The gas storage device 1 can be equipped with a safety valve 15 and a pressure gauge 16. The pressure gauge 16 is used to detect the internal gas pressure of the gas storage device 1, and the safety valve 15 is used to achieve monitoring and protection.

[0059] The water storage device 4 can be a water storage tank. The water storage device 4 is provided with an inlet 3 and an outlet 5. The inlet 3 can be a 6-port and the outlet 5 can be a 4-port. The outlet 5 of the water storage device 4 is connected to the water outlet pipeline 6 of the action system.

[0060] The gas storage device 1 can be equipped with the pressure regulating valve 2, and directly connected to the water storage device 4 through the pressure regulating valve 2. Thus, the pressure of the gas storage device 1, with the pressure regulating valve 2, can control the pressure, preventing overload that could lead to danger and affect its service life. Simultaneously, it can ensure the gas pressure of the water storage device 4 in a timely manner, avoiding insufficient gas pressure during continuous long-term use. In a further preferred embodiment, the pressure regulating valve 2 can be equipped with a check valve and a filter 9, and can have a filter element to clean the air medium, ensuring the operating conditions and lifespan of the pipeline and nozzles. In a further preferred embodiment, the pressure regulating valve 2 can also be connected to the water storage device 4 through a quick-connect adapter 8.

[0061] The water level detector can be a ball valve or similar system. This invention uses a water level detector to collect water level information from the water storage device 4. When the water level exceeds a first threshold, the controller 12 opens the pressure regulating valve 2, and the gas storage device 1 pushes the water in the water storage device 4 to the three-way valve 10. This allows a large amount of water to be stored in the three-way valve 10 and the pipeline in advance. Then, when the water level exceeds a second threshold, the controller 12 opens the solenoid valve 11, and the water stored in the three-way valve 10 is sprayed more quickly onto the vehicle wheels through the outlet pipe 6 and the spray nozzle 7, thus enabling more timely brake cooling. In a further preferred embodiment, if the water level falls below a third threshold, the water level detector and / or the controller 12 can issue an alarm. This alerts staff to replenish the water in the water storage device 4, ensuring the system can dispense water promptly.

[0062] The actuation system includes a water outlet pipeline 6 and a water spray nozzle 7. Each water outlet pipeline 6 has a plurality of water spray nozzles 7 at one end, and the water spray nozzles 7 are aimed at the vehicle wheels. Each water outlet pipeline 6 has a solenoid valve 11 at the other end, and two solenoid valves 11 are connected to the water storage device 4 through a three-way valve 10.

[0063] Each of the water outlet pipes 6 is provided with at least 3 water nozzles 7 at one end. Typically, the number of water nozzles 7 can be 3-10, and the water nozzles 7 are aimed at the vehicle wheels.

[0064] The control system includes a temperature sensor 13 and a controller 12. The temperature sensor 13 can non-contactly detect the temperature of the brake pads / brake wheels with the greatest brake fade performance. The controller 12 can control the opening and closing of the solenoid valve 11 based on the temperature information, and the controller 12 can control the opening and closing of the pressure regulating valve 2 based on the water level information. The controller 12 and the temperature sensor 13 can be powered by the vehicle power supply 14.

[0065] This invention employs a non-contact temperature sensor 13, avoiding direct installation on the brake and reducing the impact of vibration and harsh conditions on the detection accuracy of the temperature sensor 13. By placing the temperature sensor 13 on the wheel where brake fade is greatest, this invention can more accurately reflect the actual maximum wheel temperature and enable more timely brake cooling.

[0066] In some preferred embodiments, the temperature sensor 13 can be an infrared sensor, which can better achieve non-contact detection.

[0067] In some preferred embodiments, the controller 12 may include a temperature display screen 121, a first wiring port 122, a second wiring port 123, a controller switch 124, and a sensor input port 125. The controller 12 may be installed in the driver's cab so that the vehicle driver can keep abreast of the temperature information of the vehicle wheels and play a certain early warning role.

[0068] S3: When the water level information is higher than the first threshold, the controller 12 controls the opening of the pressure regulating valve 2, and the gas storage device 1 pushes the water in the water storage device 4 to the three-way valve 10;

[0069] When the temperature information is higher than the second threshold, the controller 12 controls the opening of the solenoid valve 11, and the water stored in the three-way valve 10 is sprayed onto the vehicle wheels through the water outlet pipe 6 and the spray nozzle 7.

[0070] This invention first identifies the wheel with the greatest brake fade performance in a vehicle. Then, using a temperature sensor 13, it detects the temperature of the brake pads / wheel of this wheel in a non-contact manner. The detected temperature information is then used to further determine the activation or deactivation of the braking system. Therefore, compared to existing methods that place the temperature sensor 13 on all vehicle wheels, this invention reduces the number of temperature sensors 13 required, thus lowering costs. Furthermore, compared to existing methods that randomly place the temperature sensor 13, this invention places the temperature sensor 13 on the wheel with the greatest brake fade performance, which more accurately reflects the actual maximum temperature of the wheel and allows for more timely brake cooling.

[0071] This invention collects water level information from the water storage device 4 by setting a water level detector. When the water level information is higher than the first threshold, the controller 12 controls the opening of the pressure regulating valve 2, and the gas storage device 1 pushes the water in the water storage device 4 to the three-way valve 10. In this way, a large amount of water can be stored in the three-way valve 10 and the pipeline in advance. Then, when the temperature information is higher than the second threshold, the controller 12 controls the opening of the solenoid valve 11, and the water stored in the three-way valve 10 can be sprayed onto the vehicle wheels more quickly through the water outlet pipe 6 and the spray nozzle 7, so as to cool down the brakes more promptly.

[0072] In some embodiments, during step S3, the water stored in the three-way valve 10 is sprayed through the water outlet line 6 and the spray nozzle 7 only onto the wheel with the greatest brake fade performance. The wheel with the greatest brake fade performance is the wheel that most needs cooling. In some embodiments, placing the water outlet line 6 and the spray nozzle 7 only near the wheel with the greatest brake fade performance and spraying only onto that wheel can reduce costs to some extent.

[0073] In some embodiments, during step S3, water stored in the three-way valve 10 is sprayed onto all wheels of the vehicle through the water outlet line 6 and the spray nozzle 7. In some embodiments, the water outlet line 6 and the spray nozzle 7 are located at all wheels. When the temperature of the brake pad / brake wheel with the greatest brake fade performance is detected to be higher than a second threshold, the water outlet line 6 and the spray nozzle 7 promptly spray water onto all wheels of the vehicle, which can further improve the comprehensiveness of vehicle cooling and improve driving safety.

[0074] Example 2

[0075] A vehicle employs the vehicle brake cooling method described in Example 1 for brake cooling. The vehicle typically travels on outdoor roads, at both high and low speeds, and may include vehicles such as cement mixers.

[0076] Example 3

[0077] A vehicle employs the vehicle brake cooling device described in Embodiment 1 for brake cooling. The vehicle typically travels on outdoor roads, at both high and low speeds, and may include vehicles such as cement mixers.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for cooling vehicle brakes, characterized in that, Includes the following steps: S1: Determine the wheel with the greatest brake thermal fade performance through a comparative test of brake thermal fade performance. S2: Install a vehicle brake cooling system on the vehicle, wherein the vehicle brake cooling system includes: A storage system includes a gas storage device and a water storage device. The gas storage device is connected to the water storage device through a pressure regulating valve. A water level detector is installed in the water storage device, and the water level detector can detect the water level of the water storage device. The action system includes water outlet pipelines and water nozzles. Each water outlet pipeline has several water nozzles at one end, which are aimed at the vehicle wheels. Each water outlet pipeline has a solenoid valve at the other end, and two solenoid valves are connected to the water storage device through a three-way valve. The control system includes a temperature sensor and a controller. The temperature sensor is installed only at the wheel where the vehicle brake has the greatest heat fade performance. The temperature sensor can detect the temperature information of the brake pad / brake wheel of the wheel with the greatest brake fade performance in a non-contact manner. The controller can control the opening and closing of the solenoid valve according to the temperature information, and the controller can also control the opening and closing of the pressure regulating valve according to the water level information. S3: When the water level information is higher than the first threshold, the controller controls the opening of the pressure regulating valve, and the gas storage device pushes the water in the water storage device to the three-way valve; When the temperature information is higher than the second threshold, the controller controls the opening of the solenoid valve, and the water stored in the three-way valve is sprayed onto the vehicle wheels through the water outlet pipe and the spray nozzle.

2. The vehicle brake cooling method according to claim 1, characterized in that, In S3, the water stored in the three-way valve is sprayed through the water outlet pipe and the spray nozzle only onto the wheel with the greatest brake fade performance.

3. The vehicle brake cooling method according to claim 1, characterized in that, In step S3, the water stored in the three-way valve is sprayed onto all wheels of the vehicle through the water outlet pipe and the spray nozzle.

4. The vehicle brake cooling method according to claim 1, characterized in that, The temperature sensor is an infrared sensor.

5. A vehicle brake cooling method according to claim 1, characterized in that, If the water level falls below a third threshold, the water level detector and / or the controller will issue an alarm.

6. A vehicle brake cooling method according to any one of claims 1-5, characterized in that, The test system for the comparative test of brake thermal fade performance includes a vehicle train performance tester, pedal force gauge, multi-channel temperature recorder, thermocouple, tire pressure gauge and electronic truck scale. The vehicle train performance tester measures braking distance, average braking deceleration and braking time. A pedal force gauge measures the braking force applied to the brake pedal during braking. The multi-channel temperature recorder continuously collects and stores the temperature values ​​of the thermocouples; Thermocouples are used to measure the temperature of brake discs and brake drums; Tire pressure measured with a tire pressure gauge before the test; Electronic truck scales measure the axle load of test vehicles under both unloaded and fully loaded conditions.

7. A vehicle, characterized in that, The vehicle brake cooling method described in any one of claims 1-6 is used for cooling.

8. A vehicle according to claim 7, characterized in that, The water jets are aimed only at the wheels of the vehicle where brake fade is most severe.

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