A high temperature warning system and method for an automotive brake

Abstract

This application discloses a high-temperature alarm system and method for automotive brakes, belonging to the field of automotive early warning technology. The high-temperature alarm system for automotive brakes includes: a brake controller, used to receive brake pressure signals, inertial signals, and wheel speed signals to calculate brake temperature rise; if the calculation result exceeds a temperature threshold, an alarm signal is generated; a vehicle inertial sensor, used to provide inertial signals to the brake controller to determine whether the vehicle is on a downhill road; a wheel speed sensor, used to provide wheel speed signals to the brake controller, and the brake controller calculates the vehicle speed based on the wheel speed signals; and an instrument module, used for human-machine interaction prompts; when the brake controller outputs the alarm signal, the instrument module provides an alert. This disclosure calculates the brake temperature rise in real time using a temperature rise calculation model. When the brake temperature rise reaches a certain value, an alarm signal is issued to remind the driver to stop, ensuring the safety of the occupants.

Description

Technical Field

[0001] This application belongs to the field of automotive early warning technology, and in particular relates to an automotive brake high temperature alarm system and method. Background Technology

[0002] When vehicles travel downhill for extended periods, the higher speeds necessitate frequent braking to control the vehicle. Prolonged braking causes the brakes to overheat and fade, leading to reduced braking efficiency and, in severe cases, brake failure. This can result in serious accidents, threatening lives and causing property damage. News reports of brake failure on long downhill stretches are commonplace. Therefore, monitoring and issuing warnings for brake temperature rise during long downhill driving has become an increasingly important issue.

[0003] In traditional technology, an infrared temperature sensor is installed near the vehicle's brakes to monitor the brake's temperature rise. However, when implementing this traditional technology, the brakes are located under the vehicle chassis and are frequently exposed to water and flying rocks. The sensor is easily covered by mud and water or damaged by flying rocks, leading to inaccurate or malfunctioning data. Furthermore, infrared sensors are expensive, and installing them increases the overall cost of the vehicle.

[0004] Therefore, it is necessary to provide a new high-temperature alarm system and method for automotive brakes to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this disclosure is to provide an automotive brake high temperature alarm system and method to solve the above-mentioned problems.

[0006] This disclosure achieves the above objectives through the following technical solutions: A high-temperature alarm system for automotive brakes, comprising: The brake controller receives brake pressure signals, inertial signals, and wheel speed signals to calculate brake temperature rise. If the calculation result exceeds the temperature threshold, an alarm signal is generated. A vehicle inertial sensor is used to provide inertial signals to the brake controller to determine whether the vehicle is on a downhill road. A wheel speed sensor is used to provide a wheel speed signal to the brake controller, which calculates the vehicle speed based on the wheel speed signal. The instrument module is used for human-machine interaction prompts. When the brake controller outputs the alarm signal, the instrument module provides a reminder.

[0007] As a further optimization of this disclosure, the brake controller incorporates a temperature rise calculation model, which calculates the temperature rise value based on the brake pressure signal, inertial signal, wheel speed signal, vehicle weight, and the weight of the front and rear brake discs.

[0008] As a further optimization of this disclosure, the temperature rise calculation model calculates the temperature rise as follows: The heat generated by vehicle braking during downhill driving is calculated using the kinetic energy calculation formula. The total temperature rise is calculated based on the heat and the total weight of the front and rear brake discs. Calculate the ratio of the weight of the front and rear brake discs to the total weight; The temperature rise of the front and rear brake discs was calculated based on the total temperature rise and the ratio.

[0009] As a further optimization of this disclosure, the temperature threshold ranges from 320℃ to 350℃.

[0010] As a further optimization of this disclosure, the original temperature of the front and rear brake discs is ignored, and the temperature rise value of the front and rear brake discs is directly compared with the temperature threshold. If the temperature exceeds the temperature threshold, an alarm is triggered.

[0011] As a further optimization of this disclosure, the heat generated by vehicle braking during downhill driving is calculated based on the kinetic energy calculation formula, including: E K1 =1 / 2 m 车 (v) 2 初 - v 2 当前 ); Among them, E K1 This represents the heat generated by vehicle braking when going downhill, in meters (m). 车 V represents the weight of the vehicle. 初 V represents the vehicle speed when braking begins downhill. 当前 This indicates the current vehicle speed.

[0012] As a further optimization of this disclosure, the total temperature rise is calculated based on the heat and the total weight of the front and rear brake discs, including: ΔT= m 盘 cFe Q; Where ΔT represents the total temperature rise of the front and rear brake discs, m 盘 This represents the total weight of the front and rear brake discs, where cFe represents the specific heat capacity of iron, the material of the brake disc, and Q = E. K1 This indicates the amount of heat absorbed by the brake disc.

[0013] As a further optimization of this disclosure, the ratio of the weight of each front and rear brake disc to the total weight is calculated, including: β1= m 前盘 / m 盘 ; β2= m 后盘 / m 盘 ; Where, m 前盘 Indicates the weight of the front brake disc, in meters (m). 后盘 This indicates the weight of the rear brake disc.

[0014] As a further optimization of this disclosure, the temperature rise of the front and rear brake discs is calculated based on the total temperature rise and the ratio, including: ΔT 前盘 =β1 m 盘 cFe Q; ΔT 后盘 =β2 m 盘 cFe Q; Where, ΔT 前盘 Indicates the temperature rise of the front brake disc, ΔT 后盘 This indicates the temperature rise of the rear brake disc.

[0015] A method for alarming high temperature of automotive brakes, applicable to the aforementioned automotive brake high temperature alarm system, includes the following steps: Acquire inertial signals to determine if the vehicle is on a downhill slope; Obtain wheel speed signals and calculate vehicle speed based on the wheel speed signals; Obtain the braking pressure signal to determine whether to initiate braking; The brake temperature rise is calculated based on the brake pressure signal, the inertial signal, and the wheel speed signal. If the calculation result exceeds the temperature threshold, an alarm signal is generated to remind the driver.

[0016] The beneficial effects of this disclosure are as follows: By using a temperature rise calculation model, the temperature rise of the brakes under downhill conditions is calculated. When the calculated temperature rise exceeds the temperature threshold, the brake controller reminds the driver to stop the vehicle through graphics and sound. This avoids brake failure caused by excessive brake temperature rise on long downhill slopes, ensuring the personal and property safety of passengers. Moreover, it is more reliable and less expensive than the traditional solution of adding temperature rise sensors. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the system structure in an embodiment of this disclosure; Figure 2 This is a schematic diagram of the system alarm process in an embodiment of this disclosure. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] like Figure 1 As shown, an automotive brake high-temperature alarm system includes a brake controller, a vehicle inertial sensor, a wheel speed sensor, and an instrument module. As the main control module, the brake controller receives signals from the internal brake pressure sensor and external vehicle inertial and wheel speed signals. These signals are then transmitted to the internal temperature calculation model to calculate the brake temperature rise. If the temperature exceeds the threshold, an alarm is triggered. The vehicle's inertial sensors provide inertial signals to indicate whether the vehicle is on a downhill slope. The wheel speed sensor provides the wheel rotation speed signal, which is sent to the brake controller to calculate the vehicle speed; The instrument module is used for human-machine interaction prompts. When the temperature calculated by the temperature calculation model reaches the threshold, the brake controller outputs an alarm signal, and the instrument provides text and sound reminders to inform the driver to stop the vehicle.

[0021] In this embodiment, as Figure 2 The specific workflow of the system is as follows: If the vehicle detects through its inertial sensors that it is traveling downhill and the current braking pressure is greater than zero, the brake controller enters the temperature calculation model to calculate the brake disc temperature rise, as follows: According to the kinetic energy calculation formula: E K = 1 / 2 m v 2(1) Among them, E K Let m be the vehicle's kinetic energy (J), m be the vehicle's weight (kg), and v be the vehicle's speed (m / s). Substituting into this embodiment: E K1 =1 / 2 m 车 (v) 2 初 - v 2 当前 (2) Among them, E K1 The reduction in kinetic energy of the vehicle (in J), m 车 V represents the vehicle's weight (in kg). 初 V is the vehicle speed when braking begins on a downhill slope. 当前 The current vehicle speed (unit: m / s).

[0022] Formula explanation: Braking is the conversion of a vehicle's kinetic energy into heat energy. Formula (2) can be used to calculate the heat generated by a vehicle braking downhill.

[0023] ΔT= m 盘 cFe Q; (3) Where ΔT represents the total temperature rise of the front and rear brake discs (unit: K or °C), Q represents the heat absorbed by the brake discs (unit: J), and the value of Q is related to E K1 Equal, m 盘 This indicates the total weight of the front and rear brake discs (unit: kg). cFe represents the specific heat capacity of iron ≈ 450 J / (kg·K), and the material of the brake disc is iron.

[0024] Formula explanation: The braking heat is calculated by formula (2), and the brake disc temperature rise is obtained by formula (3).

[0025] β1= m 前盘 / m 盘 (4) β2= m 后盘 / m 盘 (5) Where, m 前盘 Indicates the weight of the front brake disc, in meters (m). 后盘 This indicates the weight of the rear brake disc.

[0026] Formula explanation: Formula (4) is the ratio of the weight of the front brake disc to the total weight of the vehicle brake disc, and Formula (5) is the ratio of the weight of the rear brake disc to the total weight of the vehicle brake disc; Substitute formulas (4) and (5) into formula (3): ΔT前盘 =β1 m 盘 cFe Q; (6) ΔT 后盘 =β2 m 盘 cFe Q; (7) The temperature rise values ​​of the front and rear brake discs are obtained by formulas (6) and (7), respectively. In this embodiment, the original temperature of the front and rear brake discs is ignored, and the temperature rise of the front and rear brake discs is directly compared with the temperature threshold. When the temperature rise of the front and rear brake discs calculated by formulas (6) and (7) exceeds the temperature threshold, the brake controller sends an alarm signal to the instrument, and the instrument provides an audible and graphical alarm to remind the driver. The threshold value range is 320℃-350℃, and 350℃ is used in this embodiment.

[0027] The embodiments described above are merely examples of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent disclosure. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A high-temperature alarm system for automotive brakes, characterized in that, include: The brake controller receives brake pressure signals, inertial signals, and wheel speed signals to calculate brake temperature rise. If the calculation result exceeds the temperature threshold, an alarm signal is generated. A vehicle inertial sensor is used to provide inertial signals to the brake controller to determine whether the vehicle is on a downhill road. A wheel speed sensor is used to provide a wheel speed signal to the brake controller, which calculates the vehicle speed based on the wheel speed signal. The instrument module is used for human-machine interaction prompts. When the brake controller outputs the alarm signal, the instrument module provides a reminder.

2. The automotive brake high-temperature alarm system according to claim 1, characterized in that, The brake controller has a built-in temperature rise calculation model, which calculates the temperature rise value based on the brake pressure signal, inertia signal, wheel speed signal, vehicle weight, and the weight of the front and rear brake discs.

3. The automotive brake high-temperature alarm system according to claim 1, characterized in that, The temperature rise calculation model calculates the temperature rise as follows: The heat generated by vehicle braking during downhill driving is calculated using the kinetic energy calculation formula. The total temperature rise is calculated based on the heat and the total weight of the front and rear brake discs. Calculate the ratio of the weight of the front and rear brake discs to the total weight; The temperature rise of the front and rear brake discs was calculated based on the total temperature rise and the ratio.

4. The automotive brake high-temperature alarm system according to claim 1, characterized in that, The temperature threshold ranges from 320℃ to 350℃.

5. The automotive brake high-temperature alarm system according to claim 1, characterized in that, Ignoring the original temperature of the front and rear brake discs, the temperature rise values ​​of the front and rear brake discs are directly compared with the temperature threshold. An alarm is triggered if the temperature exceeds the temperature threshold.

6. The automotive brake high-temperature alarm system according to claim 3, characterized in that, The heat generated by vehicle braking during downhill driving is calculated using the kinetic energy calculation formula, including: E K1 =1 / 2 m 车 (v) 2 初 - v 2 当前 ); Among them, E K1 This represents the heat generated by vehicle braking when going downhill, in meters (m). 车 V represents the weight of the vehicle. 初 V represents the vehicle speed when braking begins downhill. 当前 This indicates the current vehicle speed.

7. A high-temperature alarm system for automotive brakes according to claim 6, characterized in that, The total temperature rise is calculated based on the heat and the total weight of the front and rear brake discs, including: ΔT= m 盘 cFe Q; Where ΔT represents the total temperature rise of the front and rear brake discs, m 盘 This represents the total weight of the front and rear brake discs, where cFe represents the specific heat capacity of iron, the material of the brake disc, and Q = E. K1 This indicates the amount of heat absorbed by the brake disc.

8. A high-temperature alarm system for automotive brakes according to claim 7, characterized in that, Calculate the ratio of the weight of each front and rear brake disc to the total weight, including: β1= m 前盘 / m 盘 ; β2= m 后盘 / m 盘 ; Where, m 前盘 Indicates the weight of the front brake disc, in meters (m). 后盘 This indicates the weight of the rear brake disc.

9. A high-temperature alarm system for automotive brakes according to claim 8, characterized in that, The temperature rise of the front and rear brake discs is calculated based on the total temperature rise and the ratio, including: ΔT 前盘 =β1 m 盘 cFe Q; ΔT 后盘 =β2 m 盘 cFe Q; Where, ΔT 前盘 Indicates the temperature rise of the front brake disc, ΔT 后盘 This indicates the temperature rise of the rear brake disc.

10. A method for alarming high temperature of automotive brakes, applicable to the automotive brake high temperature alarm system as described in any one of claims 1-9, characterized in that, Includes the following steps: Acquire inertial signals to determine if the vehicle is on a downhill slope; Obtain wheel speed signals and calculate vehicle speed based on the wheel speed signals; Obtain the braking pressure signal to determine whether to initiate braking; The brake temperature rise is calculated based on the brake pressure signal, the inertial signal, and the wheel speed signal. If the calculation result exceeds the temperature threshold, an alarm signal is generated to remind the driver.

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