Brake disc derusting control system based on vehicle braking and automobile

Abstract

The utility model discloses a brake disc derusting control system based on vehicle braking. The brake disc derusting control system comprises a main controller, a caliper controller, wheel end calipers, a derusting trigger module and a brake pedal sensor. Wherein the output end of the caliper controller is connected to the wheel end caliper; the output end of the derusting trigger module is connected to the main controller; the brake pedal sensor is used for collecting stroke signals of a brake pedal, and the output end of the brake pedal sensor is connected to the main controller. The output end of the main controller is connected to the caliper controller and the motor controller, and the main controller is used for controlling the caliper controller and the motor controller to respond to the braking requirement according to signals collected by the derusting trigger module and the brake pedal sensor. The device has the advantages that on the premise of not sacrificing a large amount of energy recovery efficiency and ensuring the driving economy, the brake disc can be effectively wiped and derusted through automatic wheel end caliper friction braking, the service life of a braking system is prolonged, and the driving safety of a driver is ensured.

Description

Technical Field

[0001] This invention relates to the field of automotive braking system control, and in particular to a brake disc rust removal control system based on vehicle braking and an automobile. Background Technology

[0002] The brake disc is a crucial component of the entire braking system, and its condition directly impacts braking performance and driving safety. Brake discs are typically made of cast iron. If a car is parked for extended periods in hot and rainy environments, the brake discs are prone to oxidation and corrosion, forming rust and other surface deposits. Rust on brake discs is a common problem. Rusty brake discs can produce a screeching or friction noise during braking, significantly affecting passenger comfort. Besides noise issues, the rough surface of rusty brake discs accelerates brake pad wear, shortens their lifespan, and increases the cost of replacing parts. Rust also reduces the coefficient of friction between the brake disc and the brake pads, leading to decreased braking efficiency and increased braking distance.

[0003] Brake discs that are frequently used can typically remain relatively dry. A few normal wheel-end caliper friction brakes during driving are sufficient to effectively remove surface impurities through friction between the brake pads and the disc, reducing the likelihood of rust. For example, patent application number 202110997347.8 describes a method, apparatus, device, and readable storage medium for preventing brake disc rust adhesion, which uses a clamping and releasing mechanism to squeeze out water stains, reducing rust and adhesion, and also removing rust. However, given the widespread application of energy recovery technology in new energy vehicles, vehicles equipped with this technology have their drive motors reversed during braking. The drive motor acts as a generator, shielding the wheel-end caliper friction brakes to improve vehicle energy efficiency. This is significantly different from traditional braking, which relies on contact friction with the brake disc for deceleration.

[0004] The trend towards improving the range of new energy vehicles is to continuously reduce the proportion of wheel-end caliper friction braking through energy recovery technology. Existing energy recovery technologies primarily use electric motor reverse drag for vehicle braking and deceleration. This results in less frequent and less intense friction braking of the brake discs, and insufficient friction between the brake pads and discs under electric motor braking, thus failing to achieve the desired cleaning effect. In this situation, new energy vehicle brake discs are more prone to accumulating rust and other surface debris, especially in vehicles located in coastal areas, which undoubtedly poses a threat to driving safety. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a brake disc rust removal control system and automobile based on vehicle braking. When there is a braking demand, the rust removal control of the brake disc is achieved by setting a rust removal mode. When the rust removal mode conditions are met, the braking demand of the user is met by friction braking through wheel end calipers, and rust removal is achieved at the same time.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a brake disc rust removal control system based on vehicle braking, including a main controller, a caliper controller, a wheel-end caliper, a rust removal trigger module, and a brake pedal sensor;

[0007] The output of the caliper controller is connected to the wheel-end caliper to drive the wheel-end caliper for braking;

[0008] The output of the rust removal trigger module is connected to the main controller to trigger the main controller to issue a rust removal command;

[0009] The brake pedal sensor is used to collect the travel signal of the brake pedal, and its output is connected to the main controller.

[0010] The output of the main controller is connected to the caliper controller and the motor controller, and is used to control the caliper controller and the motor controller respectively to respond to braking requirements based on the signals collected by the rust removal trigger module and the brake pedal sensor.

[0011] The rust removal trigger module includes a rust removal function switch, the output of which is connected to the main controller; when the rust removal function switch is turned on, the main controller controls the brake caliper controller to meet the braking requirements.

[0012] The rust removal triggering module also includes a power-on / off timing module and an air humidity sensor;

[0013] The power-on / off timing module is used to read the last power-off time and calculate the time interval between the last power-off time and the current power-on time. Its output is connected to the main controller.

[0014] The air humidity sensor is used to collect environmental humidity data, and its output is connected to the main controller.

[0015] The main controller determines whether to enter the rust removal mode based on the time interval and humidity data. After entering the rust removal mode, the main controller sends the corresponding braking command to the caliper controller according to the braking requirements.

[0016] The rust removal trigger module also includes a wiper status sensor, which is used to collect the working status information of the wipers. Its output is connected to the main controller, which determines whether to enter the rust removal mode based on the working status of the wipers.

[0017] The control system also includes a rust removal mode end switch, the output of which is connected to the main controller to control the end of the rust removal mode according to the opening and closing signal of the rust removal mode end switch.

[0018] The main controller and the counter are used to record the number of braking operations in the rust removal mode. The main controller determines whether to exit the rust removal mode based on the number of braking operations.

[0019] An automobile, the automobile including the aforementioned brake disc rust removal control system based on vehicle braking.

[0020] The advantages of this invention are as follows: Rust removal can be initiated manually or automatically. After the rust removal function is manually or automatically activated, the braking demand is met by caliper braking upon detecting that the brake pedal is depressed, thus completing the rust removal. At this time, caliper braking is prioritized to meet the braking demand, reducing the need for energy recovery braking by the motor controller, thereby achieving the braking purpose while simultaneously meeting the braking demand. The rust removal mode can be triggered manually by the user or based on the collected vehicle usage status. After activation, it can be deactivated by switching off the switch or by counting the number of braking actions. This allows for both manual and automatic activation and deactivation of rust removal, improving the user experience and achieving the rust removal objective. Attached Figure Description

[0021] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0022] Figure 1 This is a block diagram illustrating the structural principle of the control system of this utility model. Detailed Implementation

[0023] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0024] This embodiment provides a brake disc rust removal control system based on vehicle braking, including a main controller, a caliper controller, a wheel-end caliper, a rust removal trigger module, and a brake pedal sensor;

[0025] The output of the caliper controller is connected to the wheel-end caliper to drive the wheel-end caliper for braking;

[0026] The output of the rust removal trigger module is connected to the main controller to trigger the main controller to issue a rust removal command;

[0027] The brake pedal sensor is used to collect the travel signal of the brake pedal, and its output is connected to the main controller.

[0028] The output of the main controller is connected to the caliper controller and the motor controller, and is used to control the caliper controller and the motor controller respectively to respond to the braking demand based on the signals collected by the rust removal trigger module and the brake pedal sensor.

[0029] The outputs of the main controller are connected to the caliper controller and the motor controller, respectively. The caliper controller can provide caliper friction braking, and the motor controller can provide energy recovery braking from the motor. Both braking modes can provide braking for electric vehicles, but due to existing technology aiming to improve range, motor braking is used as much as possible. Therefore, to achieve rust removal, this application sets up a unique mode called rust removal mode. In rust removal mode, only caliper friction braking is used to meet braking requirements. After rust removal mode ends, braking is performed according to the vehicle's preset braking program. Specifically:

[0030] The rust removal trigger module is used to collect data and send it to the main controller. The main controller determines whether to enter the rust removal mode based on the collected rust removal trigger information. If the rust removal mode is entered, after detecting the braking signal collected by the brake pedal sensor, the braking demand is transmitted to the caliper controller to perform caliper friction braking to meet the user's braking demand. Otherwise, the braking demand corresponding to the brake pedal is sent to the motor controller to meet the user's braking demand.

[0031] In this embodiment, the main controller is mainly used to coordinate the distribution of braking control signals. When entering the rust removal mode, the braking command is transmitted to the caliper to achieve rust removal and braking at the same time. The main controller is generally implemented by the vehicle's brake controller, power domain controller, vehicle controller, etc., or the main controller is integrated into the brake controller, power domain controller, vehicle controller to realize its braking distribution control function.

[0032] The rust removal trigger module is mainly used to determine whether to enter the rust removal mode. In rust removal mode, the actuator is modified to meet braking requirements, switching to caliper braking. Therefore, the information collected by the rust removal trigger module is used to determine whether to enter the rust removal mode. The rust removal trigger module can be implemented in various ways, including:

[0033] The rust removal trigger module includes a rust removal function switch, the output of which is connected to the main controller. When the rust removal function switch is activated, the main controller controls the brake caliper controller to meet braking requirements. The rust removal mode can be manually activated via a set switch, allowing users to activate it based on their observations or needs.

[0034] The rust removal triggering module also includes a power-on / off timing module and an air humidity sensor. The power-on / off timing module is used to read the last power-off time and calculate the time interval between the last power-off time and the current power-on time. Its output is connected to the main controller. The air humidity sensor is used to collect environmental humidity data. Its output is connected to the main controller.

[0035] The main controller determines whether to enter the rust removal mode based on the time interval and humidity data. After entering the rust removal mode, the main controller sends the corresponding braking command to the caliper controller according to the braking demand. The main controller determines whether to enter the rust removal mode based on the collected power-on and power-off time intervals and humidity data, thus achieving the purpose of automatically entering the rust removal mode. Since the longer the power-on time interval and the humidity level, when the power-on time reaches a certain threshold under humidity, it can be estimated that rust may occur, and automatic activation is more reasonable at this time.

[0036] Furthermore, the rust removal trigger module also includes a wiper status sensor, which collects the wiper's operating status information. Its output is connected to the main controller, which determines whether to enter the rust removal mode based on the wiper's operating status. The main controller also determines whether to automatically activate the wiper mode based on the operating time recorded in the wiper's operating status information. If the wipers are on, it indicates that it is raining; a longer wiper activation time suggests prolonged operation in the rain, which may increase rust formation, thus requiring automatic activation in such cases.

[0037] In addition to activating the rust removal mode, there is also a deactivation mode. Activating the rust removal mode uses calipers for braking, while deactivating it does not intervene in the vehicle's braking, relying instead on the vehicle's own programming or design for braking control. Deactivating the rust removal mode includes:

[0038] 1. Manual shutdown: Set the rust removal mode end switch, whose output is connected to the main controller to control the end of the rust removal mode according to the opening and closing signal of the rust removal mode end switch.

[0039] 2. Automatic Shutdown: The main controller and counter record the number of braking operations in rust removal mode. The main controller determines whether to exit rust removal mode based on the number of braking operations. The rust removal mode is shut down when the number of braking operations reaches a certain threshold, or a timer is set. The rust removal mode can also be shut down if its duration exceeds a set time threshold.

[0040] This embodiment also provides a car that includes the brake disc rust removal control system based on vehicle braking described in the above embodiment, thereby achieving the purpose of rust removal.

[0041] The working principle of this application is described below:

[0042] This solution effectively cleans and removes rust from brake discs using automatic wheel-end caliper friction braking without significantly sacrificing energy recovery efficiency and maintaining driving economy. This extends the life of the braking system and ensures driver safety. Its working principle involves automatically determining whether the vehicle needs to switch to a brake rust removal mode based on the weather conditions and driving mode. During brake disc rust removal, energy recovery is not activated; the braking demand is met by the friction braking force of the wheel-end calipers. The number of wheel-end caliper friction braking cycles is adjusted based on the driver's required braking force. Once the brake disc rust removal mode is terminated, normal energy recovery is resumed. This effectively solves the problem of brake disc rust and surface foreign matter caused by prolonged parking, humid environments, rain, snow, and other factors.

[0043] This solution incorporates a brake disc rust removal mode within the brake controller ECU. When the vehicle enters this mode, if a user's braking request is received, wheel-end caliper braking is used to meet the braking demand, without employing regenerative braking. By setting a dedicated mode in the brake controller ECU that disables regenerative braking upon entry and relies solely on wheel-end caliper braking, rust removal can be achieved while still satisfying the user's braking needs.

[0044] In this solution, entering and exiting the rust removal mode is the core. By setting corresponding strategies for entering and exiting the rust removal mode, the purpose of braking and rust removal can be achieved accurately and reliably. After entering the rust removal mode, the caliper braking is controlled solely based on the user's braking needs to meet the user's braking force. After exiting the rust removal mode, energy recovery braking and / or caliper braking are controlled according to a pre-set braking strategy to meet the user's braking needs.

[0045] In this embodiment, the decision to automatically enter rust removal mode is determined based on vehicle usage environment data and vehicle usage status data, or by checking the on / off status of the onboard rust removal function switch. This allows for both automatic and manual activation of the rust removal mode, achieving more accurate and reliable rust removal and meeting the dual requirements of intelligent braking rust removal and user-initiated automatic rust removal.

[0046] In rust removal mode, the vehicle's energy recovery function is disabled, or when the wheel-end caliper braking cannot meet the user's braking force requirements, the additional braking force is used as energy recovery braking force to control the vehicle for energy recovery braking. Because caliper braking is required to remove rust from the brake discs in rust removal mode, wheel-end caliper braking should be prioritized to meet the user's braking needs, thus achieving rust removal while meeting braking requirements. Therefore, energy recovery braking needs to be disabled in rust removal mode. In some cases, a priority can be set, prioritizing caliper braking over energy recovery braking in rust removal mode. When the braking force provided by caliper braking cannot meet the user's braking needs, the additional unmet braking force is allocated to energy recovery braking, thereby meeting the user's braking needs as much as possible. The prioritized caliper braking also achieves the purpose of braking and rust removal.

[0047] After entering the rust removal mode, the number of braking actions and / or braking intensity are collected and calculated. When the number of braking actions and / or braking intensity reach a set threshold, it is determined whether to end the rust removal mode. After the rust removal mode ends, the brake controller ECU controls the calipers to brake and / or perform energy recovery braking according to preset braking logic to meet the user's braking force needs. Alternatively, entering the rust removal mode and determining whether to end it is based on the number of braking actions or the braking intensity. If the number of braking actions exceeds a certain threshold, the rust will be worn away; similarly, if the braking intensity reaches a certain level, the rust will be completely worn away. Therefore, both methods can be used to determine whether to exit the rust removal mode.

[0048] This embodiment provides multiple ways to enter the rust removal mode, including three automatic rust removal modes and one manual rust removal mode, which are described in detail below:

[0049] 1. After the vehicle is powered on, it automatically collects air humidity information and calculates the time interval since the last power-off. If it is determined that the vehicle has not been started for a long time in a humid environment, the brake ECU actively adjusts the braking mode to wheel-end caliper friction braking. Based on the driver's braking force requirements, it automatically determines the number of wheel-end caliper friction braking operations, compares the current friction state with the standard friction state, and if the difference is within a set threshold, the brake disc rust removal operation ends, and the brake ECU switches the braking mode to electric motor braking. The standard friction state is established based on the vehicle's design load, wheel rolling radius, brake parameters, calculated theoretical braking efficiency, and corrected using a model of the vehicle's actual pressure distribution under different operating conditions.

[0050] The current friction state is inverted by the contact pressure distribution through the torque fluctuation during braking, and then compared with the pressure distribution under the standard friction state to infer the current friction state of the brake disc.

[0051] The ECU records torque fluctuations or vehicle vibrations during braking using the vehicle's built-in wheel speed and torque sensors. It then queries a large database of models that have undergone extensive testing and training to compare whether the difference threshold is within the set range. If the condition is determined to be a standard friction state, the rust removal mode is exited.

[0052] 2. After the vehicle starts, the cloud weather is obtained. When the vehicle is driving or operating in rainy weather, if the air humidity or the wiper working time exceeds the threshold, the brake ECU will actively adjust the braking mode to wheel-end caliper friction braking at regular intervals. The number of wheel-end caliper friction braking operations is determined based on the current precipitation, air humidity, and wiper working frequency. When the number of wheel-end caliper friction braking operations meets the judgment condition, the difference between the current friction state and the standard friction state is compared. If the difference is within the set threshold, the brake ECU will automatically switch the braking mode to electric motor braking, and the brake disc rust removal operation will end in this cycle.

[0053] 3. When the vehicle is started for the first time after rain, the brake ECU actively adjusts the braking mode to wheel-end caliper friction braking. It automatically determines the number of wheel-end caliper friction braking operations based on the driver's braking force requirements, compares the current friction state with the standard friction state, and if the difference is within the set difference threshold, the rust removal operation ends, and the brake ECU switches the braking mode to electric motor braking.

[0054] 4. After the vehicle is started, the driver can choose to manually turn on the brake disc rust removal function switch. At this time, the brake ECU actively adjusts the braking mode to wheel-end caliper friction braking. Based on the driver's braking force requirements, it automatically determines the number of wheel-end caliper friction braking operations, compares the current friction state with the standard friction state, and if the difference is within the set difference threshold, the rust removal operation ends. The driver is automatically notified that the brake disc rust removal is complete, and the switch is turned off. The brake ECU then switches the braking mode to electric motor braking. Alternatively, the driver can manually turn off the switch based on experience or preference.

[0055] This method automatically adjusts the brake disc rust removal program based on the external environment. Firstly, it addresses rust on cast iron brake discs caused by humid environments. Whether the car is parked in a humid environment or driven in one, it's considered rust caused by humidity. Based on air humidity and the vehicle's exposure time, the probability and severity of rust are estimated. Taking into account the driver's braking force each time, the brake ECU automatically controls the braking mode switching and determines the required number of braking cycles. Secondly, under rainy conditions, brake discs are more prone to rust after being corroded by rainwater. If the vehicle is driven in the rain, wheel-end caliper friction braking is used intermittently based on the duration of rain. After rain, wheel-end caliper friction braking is used first, and the cumulative number of brake replacements is determined by the driver's braking force. Finally, the driver can manually activate the brake disc rust removal function via a soft switch on the vehicle's infotainment system. The system notifies the driver when the rust removal is complete and automatically deactivates the function.

[0056] This solution can predict the condition of the brake disc by referring to the vehicle's status and environment (air humidity, current and historical weather), estimate the required number of braking cycles by the driver's braking force, compare the difference between the current friction state and the standard friction state, and within the set difference threshold, through logical judgment, the brake ECU can automatically switch between wheel-end caliper friction braking and motor braking to achieve rust removal of the brake disc.

[0057] Obviously, the specific implementation of this invention is not limited to the above-described methods. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A brake disc rust removal control system based on vehicle braking, characterized in that: Includes main controller, caliper controller, wheel-end caliper, rust removal trigger module, and brake pedal sensor; The output of the caliper controller is connected to the wheel-end caliper to drive the wheel-end caliper for braking; The output of the rust removal trigger module is connected to the main controller to trigger the main controller to issue a rust removal command; The brake pedal sensor is used to collect the travel signal of the brake pedal, and its output is connected to the main controller. The output of the main controller is connected to the caliper controller and the motor controller, and is used to control the caliper controller and the motor controller respectively to respond to braking requirements based on the signals collected by the rust removal trigger module and the brake pedal sensor.

2. The brake disc rust removal control system based on vehicle braking as described in claim 1, characterized in that: The rust removal trigger module includes a rust removal function switch, the output of which is connected to the main controller; when the rust removal function switch is turned on, the main controller controls the brake caliper controller to meet the braking requirements.

3. The brake disc rust removal control system based on vehicle braking as described in claim 2, characterized in that: The rust removal triggering module also includes a power-on / off timing module and an air humidity sensor; The power-on / off timing module is used to read the last power-off time and calculate the time interval between the last power-off time and the current power-on time. Its output is connected to the main controller. The air humidity sensor is used to collect environmental humidity data, and its output is connected to the main controller. The main controller determines whether to enter the rust removal mode based on the time interval and humidity data. After entering the rust removal mode, the main controller sends the corresponding braking command to the caliper controller according to the braking requirements.

4. The brake disc rust removal control system based on vehicle braking as described in claim 2, characterized in that: The rust removal trigger module also includes a wiper status sensor, which is used to collect the working status information of the wipers. Its output is connected to the main controller, which determines whether to enter the rust removal mode based on the working status of the wipers.

5. A brake disc rust removal control system based on vehicle braking as described in any one of claims 1-4, characterized in that: The control system also includes a rust removal mode end switch, the output of which is connected to the main controller to control the end of the rust removal mode according to the opening and closing signal of the rust removal mode end switch.

6. A brake disc rust removal control system based on vehicle braking as described in any one of claims 1-4, characterized in that: The main controller and the counter are used to record the number of braking operations in the rust removal mode. The main controller determines whether to exit the rust removal mode based on the number of braking operations.

7. A car, characterized in that: The vehicle includes a brake disc rust removal control system based on vehicle braking as described in any one of claims 1-6.

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