A method and device for deicing water from caliper brakes

Abstract

The present invention discloses a caliper brake water drainage and deicing method and device, which calculates rainfall monitoring parameters, vehicle brake attenuation parameters, and vehicle slip rate; determines whether the activation conditions for caliper brake water drainage and deicing are met according to the rainfall monitoring parameters, vehicle brake attenuation parameters, and vehicle slip rate; if the activation conditions are met, the driving condition is obtained; if the driving condition is in the target operating condition, the caliper is controlled to drain water and deicing. In this way, the brake disc can be pressed by actively controlling the hydraulic caliper, so that the water film or ice on the brake disc can be quickly squeezed off, while preventing the caliper from rusting and ensuring the hydraulic braking effect. In addition, when a new car rolls off the assembly line, the brake caliper can also be polished by this solution.

Description

Technical Field

[0001] The present invention relates to the field of brake technology, and in particular to a caliper brake water drainage and deicing method and device. Background Art

[0002] On rainy days, when a vehicle is driving, rain will splash onto the brake disc. The water film attached to the brake disc will affect the braking effect and reduce the braking distance of the vehicle. In low temperature environments, ice attached to the brake disc will also affect the braking effect.

[0003] In the prior art, drainage is achieved by adding a drainage mechanism to the brake caliper. This method increases costs on the one hand, and on the other hand, the drainage effect of the drainage mechanism is not ideal in weather such as heavy rain. In addition, current new energy vehicles often use motor reverse torque braking and energy recovery during braking, while the use of hydraulic brake devices is greatly reduced. Over time, the brake caliper may rust and affect the braking effect of the hydraulic brake. Summary of the invention

[0004] In view of the above problems, the present invention is proposed to provide a caliper brake water drainage and deicing method and device, which actively controls the caliper to press the brake disc so that the water film or ice on the brake disc can be quickly squeezed off, while also preventing the caliper from rusting and ensuring the hydraulic braking effect.

[0005] According to a first aspect of the present invention, a caliper brake water drainage and deicing method is provided, comprising:

[0006] Calculate rainfall monitoring parameters, vehicle brake attenuation parameters, and vehicle slip rate;

[0007] Determine whether the activation conditions for caliper brake water drainage and de-icing are met based on the rainfall monitoring parameters, vehicle brake attenuation parameters, and vehicle slip rate;

[0008] If the activation conditions are met, the driving condition is obtained;

[0009] If the driving condition is in the target operating condition, the caliper is controlled to drain water and remove ice.

[0010] Optionally, calculate rainfall monitoring parameters and vehicle brake attenuation parameters, including:

[0011] Obtain wiper gear information, temperature information, rainfall information, target mileage accumulated since the last caliper drainage and de-icing, and target braking distance accumulated within the target mileage;

[0012] Determine the rainfall monitoring parameters according to the wiper gear information, temperature information and rainfall information;

[0013] The vehicle braking attenuation parameters are determined based on the target mileage and target braking distance.

[0014] Optionally, based on the rainfall monitoring parameters, the vehicle brake attenuation parameters, and the vehicle slip rate, it is determined whether the activation conditions for the caliper brake water drainage and de-icing are met, including:

[0015] The activation factor is calculated based on the rainfall monitoring parameters, the vehicle brake attenuation parameters, and the vehicle slip rate;

[0016] If the activation factor is greater than a preset threshold, the activation condition for caliper brake water drainage and de-icing is met;

[0017] If the activation factor is less than or equal to the preset threshold, the activation condition for caliper brake water drainage and de-icing is not met.

[0018] Optionally, if the driving condition is in the target operating condition, the caliper is controlled to drain water and de-ice, including:

[0019] If the driving condition is a non-rapid acceleration condition or a non-hydraulic braking condition, the driving condition is in the target operating condition;

[0020] Sending a brake torque request to the hydraulic brake controller to control the output brake torque for the caliper to drain water and de-ice;

[0021] A compensation torque request is sent to the motor controller to control the motor to output a compensation torque corresponding to the braking torque.

[0022] Optionally, the method further includes:

[0023] After the braking torque is output for a preset time, the braking torque and the compensation torque are stopped.

[0024] Optional, control of output braking torque, including:

[0025] Control the braking torque to increase to a target torque value according to a preset slope;

[0026] After the target torque value is maintained for a preset time, the braking torque is controlled from the target torque value to 0 according to a preset slope.

[0027] Optionally, the value ranges of the rainfall monitoring parameter, the vehicle brake attenuation parameter, and the vehicle slip rate are all between 0 and 1.

[0028] According to a second aspect of the present invention, there is provided a caliper brake water drainage and deicing device, comprising:

[0029] Calculation module, used to calculate rainfall monitoring parameters, vehicle brake attenuation parameters, and vehicle slip rate;

[0030] An activation module is used to determine whether activation conditions for caliper brake water drainage and de-icing are met based on rainfall monitoring parameters, vehicle brake attenuation parameters, and vehicle slip rate;

[0031] The working condition module is used to obtain the driving condition when the activation conditions are met;

[0032] The control module is used to control the caliper to drain water and de-ice when the driving condition is in the target operating condition.

[0033] According to a third aspect of the present invention, a controller is provided, the controller comprising: a memory, a processor and a computer program stored in the memory and executable on the processor, the processor executing the aforementioned caliper brake water drainage and deicing method.

[0034] According to a fourth aspect of the present invention, a vehicle is provided, the vehicle comprising a vehicle body and a controller installed in the vehicle body, wherein the controller executes the aforementioned caliper brake water drainage and deicing method.

[0035] The above one or more technical solutions in the embodiments of this specification have at least the following technical effects:

[0036] The embodiments of this specification provide a method and device for caliper brake water drainage and deicing, which calculates the rainfall monitoring parameters, the vehicle brake attenuation parameters, and the vehicle slip rate; determines whether the activation conditions for caliper brake water drainage and deicing are met according to the rainfall monitoring parameters, the vehicle brake attenuation parameters, and the vehicle slip rate; if the activation conditions are met, the driving condition is obtained; if the driving condition is in the target operating condition, the caliper is controlled to drain water and deicing. In this way, the brake disc can be pressed by actively controlling the caliper so that the water film or ice on the brake disc can be quickly squeezed off, while preventing the caliper from rusting and ensuring the hydraulic braking effect. In addition, when a new car rolls off the assembly line, the brake caliper can also be polished by this solution.

[0037] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference figures are used to represent the same parts throughout the accompanying drawings.

[0039] In the attached picture:

[0040] Figure 1A flow chart of a caliper brake water drainage and deicing method in an embodiment of the present invention is shown.

[0041] Figure 2 A schematic diagram of the braking torque and compensation torque output in an embodiment of the present invention is shown.

[0042] Figure 3 A block diagram of a caliper brake water drainage and deicing device in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0046] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The embodiment of the present invention provides a caliper brake water drainage and deicing method, combined with Figure 1 As shown in the flowchart, the caliper brake water drainage and deicing method includes steps 101 to 104:

[0048] Step 101: Calculate rainfall monitoring parameters, vehicle brake attenuation parameters, and vehicle slip rate;

[0049] In this embodiment, the caliper brake water drainage and deicing method is executed by a vehicle controller (hereinafter referred to as the controller). The controller is installed in a vehicle, and the vehicle may be a new energy vehicle, for example, a pure electric new energy vehicle or a hybrid new energy vehicle.

[0050] In this step, it is necessary to calculate the rainfall monitoring parameters, vehicle brake attenuation parameters, and vehicle slip rate. Among them, the rainfall monitoring parameters refer to the parameters used to characterize the current rainfall. The value range of the rainfall monitoring parameters is 0-1. The closer the value of the rainfall monitoring parameters is to 1, the greater the current rainfall. Conversely, the closer it is to 0, the smaller the current rainfall. The vehicle brake attenuation parameter is used to reflect the relationship between the target mileage and the target braking distance after the vehicle last completed caliper drainage and de-icing. The value range of the vehicle brake attenuation parameter is 0-1. The closer the value of the vehicle brake attenuation parameter is to 1, the lower the braking distance ratio is. The closer the vehicle brake attenuation parameter is to 0, the higher the braking distance ratio is. The vehicle slip rate is a parameter that reflects the instability of vehicle operation. The average vehicle slip rate in the current one-kilometer distance cycle window is calculated based on the wheel speed signals of the four wheels, the vehicle's yaw angular velocity, and the steering wheel angle signal when the vehicle is running, and the absolute value is taken to identify the friction coefficient of the current road conditions. That is, the higher the slip rate, the lower the friction coefficient of the current road conditions, and the greater the probability that the caliper is covered with ice and snow.

[0051] In an optional implementation, the step of calculating the rainfall monitoring parameter and the vehicle braking attenuation parameter may include:

[0052] Obtain wiper gear information, temperature information, rainfall information, target mileage accumulated since the last caliper drainage and de-icing, and target braking distance accumulated within the target mileage;

[0053] Determine the rainfall monitoring parameters according to the wiper gear information, temperature information and rainfall information;

[0054] The vehicle braking attenuation parameters are determined based on the target mileage and target braking distance.

[0055] Among them, the rain sensor in the vehicle can monitor whether the current vehicle is in a rainy area, and the rainfall information, such as the amount of rain. In addition, the amount of rain can be judged based on the gear position of the wiper motor in the vehicle as a redundant signal input for judging the amount of rain. The on-board communication terminal can provide temperature information of the area where the current vehicle is located. The controller is connected to the above components to obtain wiper gear information, temperature information, and rainfall information. Then, based on the wiper gear information, temperature information, and rainfall information, the rainfall monitoring parameters are calculated. Common calculation methods can be implemented using weighted calculation methods.

[0056] The controller can also determine the vehicle braking attenuation parameter based on the obtained target mileage and target braking distance. Specifically, the target mileage can be used as the denominator and the target braking distance can be used as the numerator. When the calculated ratio is close to 0, the vehicle braking attenuation parameter is close to 1; when the calculated ratio is greater than or equal to 0.003, the vehicle braking attenuation parameter is 0.2.

[0057] Step 102: determining whether activation conditions for caliper brake water drainage and deicing are met according to a rainfall monitoring parameter, a vehicle brake attenuation parameter, and a vehicle slip rate;

[0058] In this embodiment, after the rainfall monitoring parameter, the vehicle brake attenuation parameter, and the vehicle slip rate are calculated, it can be determined whether the activation conditions for the caliper water drainage and de-icing are met. If the activation conditions are met, it means that the caliper needs to perform water drainage and de-icing operations, and if the activation conditions are not met, it means that the caliper does not need water drainage and de-icing operations.

[0059] Specifically, when judging the activation condition, the rain monitoring parameter, the vehicle brake attenuation parameter, and the vehicle slip rate are used as a whole to judge, and the judging steps may include:

[0060] The activation factor is calculated based on the rainfall monitoring parameters, the vehicle brake attenuation parameters, and the vehicle slip rate;

[0061] If the activation factor is greater than a preset threshold, the activation condition for caliper brake water drainage and de-icing is met;

[0062] If the activation factor is less than or equal to the preset threshold, the activation condition for caliper brake water drainage and de-icing is not met.

[0063] Among them, the activation factor is determined based on the rainfall monitoring parameter, the vehicle braking attenuation parameter, and the vehicle slip rate. For example, the activation factor is denoted as δ, and a, b, and c correspond to the three input parameters of drainage and de-icing control: a is the rainfall monitoring parameter; b is the vehicle braking attenuation parameter; c is the vehicle slip rate, and δ=a×b×c is introduced, and the value ranges of the rainfall monitoring parameter, the vehicle braking attenuation parameter, and the vehicle slip rate are all between 0-1. This embodiment will pre-set a preset threshold value, which is used as a standard value for judging whether the activation conditions are met. It should be noted that the preset threshold value can be determined through a calibration test.

[0064] If the calculated activation factor is greater than the preset threshold, it means that the activation conditions for caliper brake water drainage and de-icing are met, and the current caliper needs water drainage and de-icing operations.

[0065] If the calculated activation factor is less than or equal to the preset threshold, it means that the activation conditions for caliper brake water drainage and de-icing are not met, and the current caliper does not need to perform water drainage and de-icing operations. In subsequent vehicle use, the aforementioned related data can be periodically obtained to re-judge the activation conditions.

[0066] Step 103: If the activation condition is met, the driving condition is obtained;

[0067] Taking into account that some driving conditions are not suitable for the caliper to perform water drainage and de-icing operations, in this embodiment, when the activation conditions are met, the controller does not immediately control the caliper to drain water and de-ice, but further obtains the driving conditions and analyzes the driving conditions to determine whether the current driving conditions meet the requirements for the caliper to immediately drain water and de-ice.

[0068] Step 104: If the driving condition is in the target operating condition, control the caliper to drain water and remove ice.

[0069] In this embodiment, common driving conditions include vehicle positive torque output acceleration conditions, steady speed conditions, negative torque deceleration conditions (or motor braking conditions), as well as rapid acceleration conditions and hydraulic braking conditions. Among them, rapid acceleration conditions and hydraulic braking conditions are not suitable for immediate caliper water drainage and deicing operations. In this embodiment, the conditions suitable for caliper water drainage and deicing are used as target operating conditions, and the conditions not suitable for caliper water drainage and deicing are used as non-target operating conditions.

[0070] In an optional embodiment, in combination Figure 2 As shown, if the driving condition is in the target operating condition, the caliper is controlled to drain water and de-ice, including:

[0071] When the driving condition is a non-rapid acceleration condition or a non-hydraulic braking condition, the driving condition is in a target operating condition;

[0072] Sending a brake torque request to the hydraulic brake controller to control the output brake torque for the caliper to drain water and de-ice;

[0073] A compensation torque request is sent to the motor controller to control the motor to output a compensation torque corresponding to the braking torque.

[0074] When the driving condition is in the target operating condition, it means that the caliper can immediately perform water drainage and de-icing operations. At this time, the controller will send different torque requests to the hydraulic brake controller and the motor controller, that is, send a brake torque request to the hydraulic brake controller and send a compensation torque request to the motor controller.

[0075] When the hydraulic brake controller receives a braking torque request, it will output braking torque to make the caliper stick to the brake disc. It should be noted that the caliper only needs to be in contact with the brake disc, and it is not necessary for the caliper to have a particularly obvious braking effect on the brake disc. The purpose of this embodiment is to make the water film or ice attached to the brake disc be quickly squeezed off by the contact between the caliper and the brake disc, thereby achieving the effect of draining water and deicing, accompanied by the effect of friction and rust removal. Braking the vehicle is not the effect that this embodiment wants to produce. Therefore, the controller of this embodiment also sends a compensation torque request to the motor controller at the same time, so that the front motor and / or the rear motor output an additional compensation torque to compensate for the braking torque. It is not difficult to understand that the effects of the braking torque and the compensation torque on the vehicle are opposite and offset. Combined with Figure 2 As shown, Figure 2 The upper middle part of the graph refers to the output torque of the motor. In the middle of the curve, there are solid and dotted lines. The dotted line is the output torque of the motor during normal driving, while the solid line is the output torque of the motor after the compensation torque is added. Figure 2 The lower part is the braking torque output by the hydraulic brake device. The braking torque starts to be output at the first moment, and the compensation torque of the motor also starts to be output at the first moment. The braking torque stops being output at the second moment, and the compensation torque of the motor also stops being output at the second moment. The braking torque and the compensation torque cancel each other out. This reduces the impact of the caliper on driving when it is draining water and deicing.

[0076] In an optional implementation, with respect to the output control of the braking torque, this embodiment may include the following steps:

[0077] After the braking torque is output for a preset time, the braking torque and the compensation torque are stopped.

[0078] or, controlling the braking torque to increase to a target torque value according to a preset slope;

[0079] After the target torque value is maintained for a preset time, the braking torque is controlled from the target torque value to 0 according to a preset slope.

[0080] In simple terms, in order to ensure smooth driving, when performing the caliper water drainage and de-icing operation, the brake torque is steadily increased from 0 to the target torque value according to the preset slope. After the target torque value is maintained for a period of time, it is decreased according to the preset slope. After the target torque value drops to 0, the caliper water drainage and de-icing operation is completed. It should be noted that the target torque value is determined based on the calibration test. It is not difficult to understand that different models have different hydraulic brake devices and corresponding target torque values, which are not limited in this embodiment.

[0081] For example, after a vehicle determines that the activation conditions are met and the current driving condition is a steady speed condition, it determines that the caliper can immediately perform water removal and de-icing operations. The controller sends a braking torque request to the hydraulic brake controller, and the hydraulic brake controller outputs the braking torque according to the braking torque request. The braking torque is output at 10Nm / s in the first stage. 2 The acceleration is steadily increased to the target torque value of 50Nm, and then the braking torque output enters the second stage. In the second stage, the braking torque is maintained at 50Nm and maintained for a preset time of 60 seconds. After that, the braking torque is output to enter the third stage. In the third stage, the braking torque is 10Nm / s 2 The acceleration steadily drops to 0Nm.

[0082] In summary, the embodiment of this specification provides a method for deicing by draining water from a caliper brake, by calculating the rainfall monitoring parameters, the vehicle brake attenuation parameters, and the vehicle slip rate; according to the rainfall monitoring parameters, the vehicle brake attenuation parameters, and the vehicle slip rate, it is determined whether the activation conditions for deicing by draining water from a caliper brake are met; if the activation conditions are met, the driving condition is obtained; if the driving condition is in the target operating condition, the caliper is controlled to drain water and de-ice. In this way, the brake disc can be pressed by actively controlling the caliper so that the water film or ice on the brake disc can be quickly squeezed off, while preventing the caliper from rusting and ensuring the hydraulic braking effect. In addition, when a new car rolls off the assembly line, the brake caliper can also be polished by this solution.

[0083] Based on the same inventive concept, Figure 3 As shown, this embodiment provides a caliper brake water drainage and deicing device, including: a calculation module, an activation module, a working condition module and a control module.

[0084] The calculation module is used to calculate the rainfall monitoring parameters, vehicle brake attenuation parameters, and vehicle slip rate;

[0085] The activation module is used to determine whether the activation conditions for caliper brake drainage and de-icing are met based on the rainfall monitoring parameters, vehicle brake attenuation parameters, and vehicle slip rate;

[0086] The working condition module is used to obtain the driving condition when the activation conditions are met;

[0087] The control module is used to control the caliper to drain water and de-ice when the driving condition is in the target operating condition.

[0088] In an optional implementation, the calculation module is further used for:

[0089] Obtain wiper gear information, temperature information, rainfall information, target mileage accumulated since the last caliper drainage and de-icing, and target braking distance accumulated within the target mileage;

[0090] Determine the rainfall monitoring parameters according to the wiper gear information, temperature information and rainfall information;

[0091] The vehicle braking attenuation parameters are determined based on the target mileage and target braking distance.

[0092] In an optional implementation, the activation module is further used to:

[0093] The activation factor is calculated based on the rainfall monitoring parameters, the vehicle brake attenuation parameters, and the vehicle slip rate;

[0094] If the activation factor is greater than a preset threshold, the activation condition for caliper brake water drainage and de-icing is met;

[0095] If the activation factor is less than or equal to the preset threshold, the activation condition for caliper brake water drainage and de-icing is not met.

[0096] In an optional implementation, the control module is further configured to:

[0097] If the driving condition is a non-rapid acceleration condition or a non-hydraulic braking condition, the driving condition is in the target operating condition;

[0098] Send a brake torque request to the hydraulic brake controller to control the output brake torque for the caliper to drain water and de-ice.

[0099] A compensation torque request is sent to the motor controller to control the motor to output a compensation torque corresponding to the braking torque.

[0100] In an optional implementation, the control module is further configured to:

[0101] After the braking torque is output for a preset time, the braking torque and the compensation torque are stopped.

[0102] In an optional implementation, the control module is further configured to:

[0103] Control the braking torque to increase to a target torque value according to a preset slope;

[0104] After the target torque value is maintained for a preset time, the braking torque is controlled from the target torque value to 0 according to a preset slope.

[0105] Optionally, the value ranges of the rainfall monitoring parameter, the vehicle brake attenuation parameter, and the vehicle slip rate are all between 0 and 1.

[0106] In summary, the embodiment of this specification provides a caliper brake water drainage and deicing device, which calculates the rainfall monitoring parameters, the vehicle brake attenuation parameters, and the vehicle slip rate; determines whether the activation conditions for the caliper brake water drainage and deicing are met according to the rainfall monitoring parameters, the vehicle brake attenuation parameters, and the vehicle slip rate; if the activation conditions are met, the driving condition is obtained; if the driving condition is in the target operating condition, the caliper is controlled to drain water and deicing. In this way, the brake disc can be pressed by actively controlling the hydraulic caliper, so that the water film or ice on the brake disc can be quickly squeezed off, while preventing the caliper from rusting and ensuring the hydraulic braking effect. In addition, when a new car rolls off the assembly line, the brake caliper can also be polished by this solution.

[0107] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the caliper brake water drainage and deicing device described above can refer to the corresponding process in the aforementioned method, and will not be elaborated here.

[0108] According to the third aspect of the present invention, a vehicle controller (which may be referred to as the controller for short) is provided, which includes a caliper brake water drainage and de-icing device, a memory, a processor and a communication unit. The memory stores machine-readable instructions executable by the processor. When the controller is running, the processor and the memory communicate through a bus, the processor executes the machine-readable instructions, and executes the caliper brake water drainage and de-icing method.

[0109] The memory, the processor, and the communication unit are electrically connected to each other directly or indirectly to achieve signal transmission or interaction. For example, these elements can be electrically connected to each other through one or more communication buses or signal lines. The caliper brake water drainage and deicing device includes at least one software function module that can be stored in the memory in the form of software or firmware. The processor is used to execute the executable module stored in the memory (for example, the software function module or computer program included in the caliper brake water drainage and deicing device).

[0110] Among them, the memory can be, but is not limited to, random access memory (Random Access Memory, RAM), read only memory (Read Only Memory, ROM), programmable read-only memory (Programmable Read-Only Memory, PROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, EPROM), electrically erasable read-only memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc.

[0111] In some embodiments, the processor is used to perform one or more functions described in the present embodiment. In some embodiments, the processor may include one or more processing cores (e.g., a single-core processor (S) or a multi-core processor (S)). By way of example only, the processor may include a central processing unit (CPU), an application specific integrated circuit (ASIC), an application specific instruction set processor (ASIP), a graphics processing unit (GPU), a physical processing unit (PPU), a digital signal processor (DSP), a field programmable gate array (FPGA), a programmable logic device (PLD), a controller, a microcontroller unit, a reduced instruction set computer (RISC) or a microprocessor, or any combination thereof.

[0112] In this embodiment, the memory is used to store the program, and the processor is used to execute the program after receiving the execution instruction. The process definition method disclosed in any implementation of this embodiment can be applied to the processor, or implemented by the processor.

[0113] The communication unit is used to establish a communication connection between the controller and other devices through the network, and to send and receive data through the network.

[0114] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the controller described above can refer to the corresponding process in the aforementioned method, and will not be elaborated here.

[0115] Based on the same inventive concept, this embodiment also provides a vehicle, including a vehicle body and a controller installed in the vehicle body, wherein the controller is used to implement the aforementioned caliper brake water drainage and deicing method.

[0116] Among them, the vehicle is a new energy vehicle, and the vehicle can be a pure electric new energy vehicle or a hybrid new energy vehicle.

[0117] In this embodiment, a rain sensor and a wiper motor are provided in the vehicle. The rain sensor can monitor whether the current vehicle is in a rainy area, and the rainfall information, such as the amount of rainfall. In addition, the amount of rainfall can be judged based on the gear position of the wiper motor as a redundant signal input for judging the amount of rainfall. The on-board communication terminal in the vehicle can provide temperature information of the area where the current vehicle is located. The controller is connected to the above components to obtain wiper gear information, temperature information, and rainfall information. Then, based on the wiper gear information, temperature information, and rainfall information, the rainfall monitoring parameters are calculated. Common calculation methods can be implemented using weighted calculations.

[0118] The controller can also determine the vehicle braking attenuation parameter based on the obtained target mileage and the corresponding target braking distance. Specifically, the target mileage can be used as the denominator and the target braking distance can be used as the numerator. When the calculated ratio is close to 0, the vehicle braking attenuation parameter is close to 1; when the calculated ratio is greater than or equal to 0.003, the vehicle braking attenuation parameter is 0.2.

[0119] After the rainfall monitoring parameters, vehicle brake attenuation parameters, and vehicle slip rate are calculated, it can be determined whether the activation conditions for caliper water drainage and de-icing are met. If the activation conditions are met, it means that the caliper needs to be de-iced and drained; if the activation conditions are not met, it means that the caliper does not need to be de-iced and drained.

[0120] Taking into account that some driving conditions are not suitable for the caliper to perform water drainage and de-icing operations, in this embodiment, when the activation conditions are met, the controller does not immediately control the caliper to drain water and de-ice, but further obtains and analyzes the driving conditions to determine that the current driving conditions meet the requirements for the caliper to perform water drainage and de-icing.

[0121] In this embodiment, common driving conditions include vehicle positive torque output acceleration conditions, steady speed conditions, negative torque deceleration conditions (or motor braking conditions), as well as rapid acceleration conditions and hydraulic braking conditions. Among them, for rapid acceleration conditions and hydraulic braking conditions, it is not suitable to immediately perform caliper water drainage and deicing operations. In this embodiment, the conditions suitable for caliper water drainage and deicing are used as target operating conditions, and the conditions not suitable for caliper water drainage and deicing are used as non-target operating conditions. If the driving condition is in the target operating condition, the caliper water drainage and deicing are controlled.

[0122] In summary, the embodiments of this specification provide a caliper brake water drainage and deicing device and apparatus, which calculates the rainfall monitoring parameters, the vehicle brake attenuation parameters, and the vehicle slip rate; determines whether the activation conditions for the caliper brake water drainage and deicing are met according to the rainfall monitoring parameters, the vehicle brake attenuation parameters, and the vehicle slip rate; if the activation conditions are met, the driving condition is obtained; if the driving condition is in the target operating condition, the caliper is controlled to drain water and deicing. In this way, the brake disc can be pressed by actively controlling the hydraulic caliper, so that the water film or ice on the brake disc can be quickly squeezed off, while preventing the caliper from rusting and ensuring the hydraulic braking effect. In addition, when a new car rolls off the assembly line, the brake caliper can also be polished by this solution.

[0123] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the controller of the vehicle described above can refer to the corresponding process in the aforementioned method, and will not be elaborated here.

[0124] The above are only various embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A caliper brake water drainage and deicing method, characterized in that: include: Calculate rainfall monitoring parameters, vehicle brake attenuation parameters, and vehicle slip rate; Determining whether the activation condition of caliper brake water drainage and deicing is met according to the product of the rainfall monitoring parameter, the vehicle brake attenuation parameter, and the vehicle slip rate; wherein the vehicle brake attenuation coefficient is a coefficient of the target mileage accumulated after the last caliper water drainage and deicing and the target braking distance accumulated in the target mileage; If the activation condition is met, the driving condition is obtained; If the driving condition is a non-sudden acceleration condition or a non-hydraulic braking condition, the driving condition is in the target operating condition, a braking torque request is sent to the hydraulic brake controller to control the output braking torque for the caliper to drain water and de-ice, and a compensation torque request is sent to the motor controller to control the motor to output a compensation torque corresponding to the braking torque.

2. The method according to claim 1, characterized in that The calculation of the rainfall monitoring parameter and the vehicle braking attenuation parameter includes: Obtaining wiper gear information, temperature information, rainfall information, target mileage accumulated since the last caliper drainage and de-icing, and target braking distance accumulated within the target mileage; Determining the rainfall monitoring parameter according to the wiper gear information, temperature information, and rainfall information; The vehicle braking attenuation parameter is determined according to the target mileage and the target braking distance.

3. The method according to claim 1, characterized in that The determining whether the activation condition of the caliper brake water drainage and de-icing is met according to the rainfall monitoring parameter, the vehicle brake attenuation parameter, and the vehicle slip rate includes: Calculating an activation factor according to the rainfall monitoring parameter, the vehicle brake attenuation parameter, and the vehicle slip rate; If the activation factor is greater than a preset threshold, the activation condition for caliper brake water drainage and de-icing is met; If the activation factor is less than or equal to the preset threshold, the activation condition for caliper brake water drainage and de-icing is not met.

4. The method according to claim 1, characterized in that: The method further comprises: After the braking torque is output for a preset time period, the braking torque and the compensation torque are stopped from being output.

5. The method according to claim 1, characterized in that The controlling of the output braking torque comprises: Control the braking torque to increase to a target torque value according to a preset slope; After the target torque value is maintained for a preset time period, the braking torque is controlled to decrease from the target torque value to 0 according to a preset slope.

6. The method according to claim 1, characterized in that The value ranges of the rainfall monitoring parameter, the vehicle braking attenuation parameter, and the vehicle slip rate are all between 0 and 1.

7. A caliper brake water drainage and deicing device, characterized in that: Using the caliper brake water drainage and deicing method according to any one of claims 1 to 6, the device comprises: Calculation module, used to calculate rainfall monitoring parameters, vehicle brake attenuation parameters, and vehicle slip rate; an activation module, used to determine whether activation conditions for caliper brake water drainage and deicing are met according to the rainfall monitoring parameter, the vehicle brake attenuation parameter, and the vehicle slip rate; A working condition module, used for obtaining the driving working condition when the activation condition is met; The control module is used to control the caliper to drain water and de-ice when the driving condition is in the target operating condition.

8. A controller, characterized in that: The controller includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the caliper brake water drainage and deicing method described in any one of claims 1 to 6 is implemented.

9. A vehicle, characterized in that: The vehicle comprises a vehicle body and a controller installed in the vehicle body, wherein the controller executes the caliper brake water drainage and deicing method according to any one of claims 1-6.

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