EPB controller sleep control method and system

Abstract

The present invention discloses an EPB controller sleep control method and system, the method comprising the following steps: when the power-on wake-up circuit of the EPB controller is powered off, controlling the sending of a power request signal; when the acquired power request signal is a preset signal value, controlling the EPB controller to maintain a suspended state without entering sleep and interacting with the CAN bus; when the acquired power request signal is not a preset signal value, controlling the EPB controller to enter a sleep state. The present application provides an EPB controller sleep control method, after the power-on wake-up circuit of the EPB controller is powered off, the EPB controller does not directly sleep, but enters a suspended state. In the suspended state, the EPB controller does not interact with the CAN bus signal, does not wake up other controllers of the vehicle, and maintains a low power consumption state, avoiding the occurrence of power supply risks and the waste of electricity in the process of waking up other controllers that affects the vehicle's cruising range.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle control, and in particular to an EPB controller sleep control method and system. Background Art

[0002] like Figure 1 As shown, it is the EPB controller integration solution and data interaction solution. The software of the EPB controller includes two parts: HOST and PBC. Among them, HOST provides the PBC integration environment. HOST interacts with the vehicle CAN bus for data and passes external requests and functional requirements to PBC. PBC responds and executes. PBC is the execution software, responds to the request of HOST, and executes related functions. Among them, KL30 is the power supply circuit of the EPB controller. KL30 is always in the ON state. If it is accidentally disconnected, it is an accidental power outage. KL15 is the power-on wake-up circuit of the EPB controller. KL15=ON, the EPB controller is in the Normal state, KL15=OFF, the EPB controller enters the sleep stage, and the EPB caliper provides the vehicle with parking clamping force. There are clamping state and release state. The EPB switch inputs a signal to the EPB controller to control the clamping and release of the EPB caliper. The power supply is the vehicle battery

[0003] In the prior art, after the vehicle has braked multiple times, the temperature of the brake disc rises to over 200°C, and the EPB controller triggers the high-temperature re-clamping function. The EPB controller lasts up to 15 minutes to complete sleep, which will wake up all controllers of the vehicle with NM network management, causing the vehicle to be unable to complete sleep. Each controller consumes power, which has the risk of power supply, and the energy consumption is large, resulting in power waste and reduced vehicle range.

[0004] The KL30 of the EPB controller is accidentally disconnected, triggering the EPB controller's unexpected power-off logic. For the parking safety of the entire vehicle, the brake disc temperature model in the controller will be set to 500°C. When the vehicle is locked and dormant, the EPB controller activates the high-temperature re-clamping function. The EPB controller will continue to wake up the vehicle for more than 10 minutes, causing a waste of power and reducing the vehicle's cruising range.

[0005] The rolling re-clamping function of the EPB controller requires the input of wheel speed changes on the CAN bus to trigger the function. When the slope is ≥8%, the EPB controller will continue to wake up the vehicle for 10 minutes to ensure the effectiveness of the rolling re-clamping function and increase the power consumption of the vehicle. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned background technology and to provide an EPB controller sleep control method and system.

[0007] In a first aspect, the present application provides an EPB controller sleep control method, comprising the following steps:

[0008] When the power-on wake-up circuit of the EPB controller is powered off, the control sends a power request signal;

[0009] When the acquired power supply request signal is a preset signal value, the EPB controller is controlled to maintain a suspended state without entering sleep mode and without interacting with the CAN bus;

[0010] When the acquired power supply request signal is not a preset signal value, the EPB controller is controlled to enter a sleep state.

[0011] According to the first aspect, in a first possible implementation manner of the first aspect, when the power-on wake-up circuit of the EPB controller is powered off, the step of controlling the sending of the power supply request signal specifically includes the following steps:

[0012] When the power-on wake-up circuit of the EPB controller is powered off, the operating condition of the vehicle is obtained;

[0013] According to the operating conditions of the vehicle, the control sends a power supply request signal.

[0014] According to a first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the step of controlling sending a power supply request signal according to an operating condition of the vehicle specifically includes the following steps:

[0015] When the vehicle operating condition meets any of the following conditions, the control sends a power supply request signal with a preset signal value:

[0016] Working condition 1: the vehicle slope is greater than the first slope value and the rear brake disc temperature is greater than the preset temperature;

[0017] Working condition 2: EPB control power supply line is accidentally disconnected;

[0018] Working condition 3: the vehicle slope is greater than the second slope value;

[0019] Wherein, the second slope value is greater than the first slope value;

[0020] When the vehicle operating condition does not meet any of the above conditions, the control sends a power supply request signal with a non-preset signal value.

[0021] According to the first aspect, in a third possible implementation manner of the first aspect, after the step of controlling the EPB controller to maintain a suspended state without entering sleep mode and without interacting with the CAN bus when the acquired power supply request signal is a preset signal value, the following steps are also included:

[0022] When the acquired power supply request signal is a preset signal value, the EPB controller is controlled to maintain a suspended state without entering sleep mode and without interacting with the CAN bus;

[0023] Obtain vehicle acceleration through the acceleration sensor built into the EPB controller;

[0024] According to the obtained vehicle acceleration, the slope sliding condition of the vehicle is obtained;

[0025] When the vehicle is in a sliding state, the EPB caliper is controlled to perform a clamping operation.

[0026] According to the third possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the step of acquiring the slope sliding condition of the vehicle according to the acquired vehicle acceleration specifically includes the following steps:

[0027] When the acquired acceleration variation is greater than the first acceleration fluctuation threshold and the duration exceeds a preset period, it is determined that the vehicle is in a slow slope sliding state;

[0028] When the acquired acceleration variation is greater than the second acceleration fluctuation amount threshold, and the acceleration fluctuation frequency is greater than the fluctuation frequency threshold, it is determined that the vehicle is in a fast rolling downhill state;

[0029] The first acceleration fluctuation threshold is smaller than the second acceleration fluctuation threshold.

[0030] According to the first aspect, in a fifth possible implementation manner of the first aspect, after the step of controlling the EPB controller to maintain a suspended state without entering sleep mode and without interacting with the CAN bus when the acquired power supply request signal is a preset signal value, the following steps are also included:

[0031] Obtain the operating conditions of the vehicle;

[0032] According to the operating conditions of the vehicle, the EPB controller is controlled to execute different post-suspend sleep strategies.

[0033] According to a fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, after the step of controlling the EPB controller to execute different post-suspend sleep strategies according to the operating conditions of the vehicle, the following steps are further included:

[0034] When the temperature of the rear brake disc is lower than a preset temperature value and the EPB caliper performs a rolling re-clamping operation for more than a preset time, controlling the sending of a power supply request signal of a non-preset signal value;

[0035] When the acquired power supply request signal is not a preset signal value, the EPB controller is controlled to enter a sleep state.

[0036] According to the fifth possible implementation manner of the first aspect, in the seventh possible implementation manner of the first aspect, after the step of controlling the EPB controller to execute different post-suspend sleep strategies according to the operating conditions of the vehicle, the following steps are also included:

[0037] When the temperature of the rear brake disc is not lower than a preset temperature value or the rolling re-clamping operation time of the EPB caliper does not exceed a preset time, the EPB controller is controlled to maintain a suspended state without entering sleep mode and interacting with the CAN bus.

[0038] In a second aspect, the present application provides an EPB controller sleep control system, comprising:

[0039] A power supply request signal sending control module, used for controlling the sending of a power supply request signal after the power-on wake-up circuit of the EPB controller is powered off;

[0040] An EPB controller suspension control module is communicatively connected with the power supply request signal sending control module, and is used to control the EPB controller to maintain a suspension state without entering sleep mode and interacting with the CAN bus when the acquired power supply request signal is a preset signal value;

[0041] The EPB controller sleep control module is communicatively connected with the power supply request signal sending control module, and is used for controlling the EPB controller to enter a sleep state when the acquired power supply request signal is not a preset signal value.

[0042] According to the second aspect, in a first possible implementation manner of the second aspect, the power supply request signal sending control module includes:

[0043] The vehicle operating condition acquisition submodule is used to obtain the vehicle operating condition after the power-on wake-up circuit of the EPB controller is powered off;

[0044] The power supply request signal acquisition submodule is communicatively connected to the vehicle operating condition acquisition submodule, and is used to control the sending of the power supply request signal according to the operating condition of the vehicle.

[0045] Compared with the prior art, the advantages of the present invention are as follows:

[0046] The present application provides an EPB controller sleep control method. After the EPB controller is powered on and the wake-up circuit is powered off, the EPB controller does not go into sleep directly, but enters a suspended state. In the suspended state, the EPB controller does not interact with the CAN bus signal, does not wake up other controllers of the vehicle, and maintains a low power consumption state, thereby avoiding the occurrence of power supply risks and the waste of electricity in the process of waking up other controllers that affects the vehicle's cruising range. At the same time, the activation of the EPB controller's re-clamping function can be achieved to ensure parking safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic diagram of the existing EPB controller integration solution and data interaction solution;

[0048] Figure 2 is a method flow chart of an EPB control sleep control method provided by an embodiment of the present invention;

[0049] Figure 3 is another method flow chart of the EPB controller sleep control method provided by an embodiment of the present invention;

[0050] Figure 4 It is a functional module block diagram of the EPB controller sleep control system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0051] Reference will now be made in detail to specific embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Although the present invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the present invention to the embodiments described. On the contrary, it is intended to cover changes, modifications and equivalents included in the spirit and scope of the present invention as defined by the appended claims. It should be noted that the method steps described herein can all be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of the two.

[0052] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0053] Note: The example to be introduced below is only a specific example, and is not intended to limit the embodiments of the present invention to the following specific steps, values, working conditions, data, sequences, etc. Those skilled in the art can apply the concept of the present invention to construct more embodiments not mentioned in this specification by reading this specification.

[0054] Even after the power-on wake-up circuit of the existing EPB controller is powered off, the EPB controller will wake up other controllers due to the high temperature of the brake disc, accidental disconnection of the power-on wake-up circuit of the EPB controller, or triggering of the rolling re-clamp function. The operation of each controller will consume power, there is a risk of power supply, and the energy consumption is large, resulting in power waste, which affects the vehicle's cruising range.

[0055] In view of this, the present application provides an EPB controller sleep control method to solve the technical problem that after the power-on wake-up circuit of the existing EPB controller is powered off, the EPB controller will still wake up other controllers, resulting in power supply risks for the vehicle and power waste affecting the vehicle's cruising range.

[0056] First, see Figure 2As shown, an embodiment of the present invention provides an EPB controller sleep control method, comprising the following steps:

[0057] Step S1, when the power-on wake-up circuit of the EPB controller is powered off, control sending of a power supply request signal;

[0058] Step S2: when the acquired power supply request signal is a preset signal value, controlling the EPB controller to maintain a suspended state without entering sleep mode and without interacting with the CAN bus;

[0059] Step S3: When the acquired power supply request signal is not a preset signal value, the EPB controller is controlled to enter a sleep state.

[0060] The present application provides an EPB controller sleep control method. After the EPB controller is powered on and the wake-up circuit is powered off, the EPB controller does not go into sleep directly, but enters a suspended state. In the suspended state, the EPB controller does not interact with the CAN bus signal, does not wake up other controllers of the vehicle, and maintains a low power consumption state, so as to avoid waking up other controllers and causing the risk of power supply to the vehicle, and avoid the waste of electricity in the process of waking up other controllers, which affects the vehicle's cruising range.

[0061] In one embodiment, the preset signal value is 27. When the acquired power request signal is 27, the EPB controller is controlled to maintain a suspended state without entering sleep mode and interacting with the CAN bus; when the acquired power request signal is not 27, the EPB controller is controlled to enter a sleep mode.

[0062] In one embodiment, see Figure 3 As shown, different power supply request signals are sent under different vehicle operating conditions. An embodiment of the present invention provides an EPB controller sleep control method, comprising the following steps:

[0063] Step S11, when the power-on wake-up circuit of the EPB controller is powered off, obtaining the operating condition of the vehicle;

[0064] Step S12: Controlling sending of a power supply request signal according to the operating condition of the vehicle;

[0065] Step S2: when the acquired power supply request signal is a preset signal value, controlling the EPB controller to maintain a suspended state without entering sleep mode and without interacting with the CAN bus;

[0066] Step S3: When the acquired power supply request signal is not a preset signal value, the EPB controller is controlled to enter a sleep state.

[0067] In one embodiment, the step of controlling the sending of the power supply request signal according to the operating condition of the vehicle specifically includes the following steps:

[0068] When the vehicle operating condition meets any of the following conditions, the control sends a power supply request signal with a preset signal value:

[0069] Working condition 1: the vehicle slope is greater than the first slope value and the rear brake disc temperature is greater than the preset temperature. Under this working condition, the vehicle is in a sliding state and the rear brake disc is in a high temperature state. The EPB controller needs to activate the high temperature re-clamping function;

[0070] Working condition 2: The EPB control power supply line is accidentally disconnected. In this working condition, for the parking safety of the whole vehicle, the EPB controller's unexpected power-off logic will be triggered, and the brake disc temperature model in the controller will be set to 500°C. Therefore, the EPB controller needs to activate the high-temperature re-clamping function;

[0071] Working condition 3: the vehicle slope is greater than the second slope value. Under this working condition, the EPB controller will trigger the rolling re-clamp function to ensure parking safety.

[0072] Wherein, the second slope value is greater than the first slope value;

[0073] When any of the above conditions is met, the EPB controller needs to maintain low-power operation, without signal interaction, and will not wake up other controllers. It must monitor changes in internal signal states and cannot directly enter sleep mode.

[0074] When the vehicle operating condition does not meet any of the above conditions, that is, it does not meet conditions 1, 2 and 3 at the same time, the control sends a power request signal with a non-preset signal value, indicating that the high-temperature re-clamping function or the rolling re-clamping function will not be triggered, and the EPB controller can directly enter the sleep state.

[0075] In one embodiment, after the step of controlling the EPB controller to maintain a suspended state without entering sleep mode and without interacting with the CAN bus when the acquired power supply request signal is a preset signal value, the following steps are also included:

[0076] When the acquired power supply request signal is a preset signal value, the EPB controller is controlled to maintain a suspended state without entering sleep mode and without interacting with the CAN bus;

[0077] Obtain vehicle acceleration through the acceleration sensor built into the EPB controller;

[0078] According to the obtained vehicle acceleration, the slope sliding condition of the vehicle is obtained;

[0079] When the vehicle is in a state of sliding down a slope, the EPB caliper is controlled to perform a clamping operation to apply a clamping force to prevent the vehicle from sliding down a slope. This is the triggering logic of the rolling re-clamping of the EPB controller sleep control method provided in this application, so that when the EPB controller is in a suspended state, there is no need to interact with the CAN bus to obtain the wheel speed signal. The vehicle's sliding down a slope state is obtained through the acceleration sensor, and the rolling re-clamping function is triggered to ensure driving safety in the vehicle's sliding down a slope state.

[0080] In one embodiment, the acceleration sensor is a longitudinal acceleration sensor.

[0081] Generally, the EPB controller includes a HOST and a PBC.

[0082] In one embodiment, the EPB control includes a HOST, a PBC and an acceleration sensor, and the acceleration sensor is connected to the HOST.

[0083] In one embodiment, the step of obtaining the vehicle's rolling downhill condition according to the obtained vehicle acceleration specifically includes the following steps:

[0084] When the acquired acceleration variation is greater than the first acceleration fluctuation threshold and the duration exceeds a preset period, it is determined that the vehicle is in a slow slope sliding state;

[0085] When the acquired acceleration variation is greater than the second acceleration fluctuation amount threshold, and the acceleration fluctuation frequency is greater than the fluctuation frequency threshold, it is determined that the vehicle is in a fast rolling downhill state;

[0086] The first acceleration fluctuation threshold is smaller than the second acceleration fluctuation threshold.

[0087] In one embodiment, a longitudinal acceleration sensor is added to the EPB controller to monitor the vehicle's sliding state, and the acceleration signal value y=a+bx, where a is the initial acceleration value of the vehicle after parking, x is the acceleration fluctuation value, and b is the correction coefficient;

[0088] z=Δx / Δt, where z is the frequency of acceleration fluctuation, Δt is a period of time, and Δx is the change of x within Δt.

[0089] When x≥c (c is a set constant value) is met and lasts for 10 cycles, the vehicle is judged to be in a slow slope sliding state;

[0090] When x≥d (d is a set value) and z≥e (e is a set value), the vehicle is judged to be in a fast rolling state;

[0091] When the vehicle is in a sliding slope state (including fast sliding slope state and slow sliding slope state), the EPB controller controls the EPB caliper to apply clamping force again to prevent the vehicle from sliding down the slope. This is the trigger logic of rolling re-clamping.

[0092] In one embodiment, after the step of controlling the EPB controller to maintain a suspended state without entering sleep mode and without interacting with the CAN bus when the acquired power supply request signal is a preset signal value, the following steps are also included:

[0093] Obtain the operating conditions of the vehicle;

[0094] According to the operating conditions of the vehicle, the EPB controller is controlled to execute different post-suspend sleep strategies.

[0095] In one embodiment, after the step of controlling the EPB controller to execute different post-suspend sleep strategies according to the operating conditions of the vehicle, the following steps are also included:

[0096] When the temperature of the rear brake disc is lower than a preset temperature value and the EPB caliper performs a rolling re-clamping operation for more than a preset time, controlling the sending of a power supply request signal of a non-preset signal value;

[0097] When the acquired power supply request signal is not a preset signal value, the EPB controller is controlled to enter a sleep state, so as to implement a post-suspend sleep strategy of exiting the suspend state and entering sleep under qualified working conditions when the EPB controller maintains a suspend state.

[0098] In one embodiment, after the step of controlling the EPB controller to execute different post-suspend sleep strategies according to the operating conditions of the vehicle, the following steps are also included:

[0099] When the temperature of the rear brake disc is not lower than a preset temperature value or the rolling re-clamping operation time of the EPB caliper does not exceed a preset time, the EPB controller is controlled to maintain a suspended state without entering sleep mode and interacting with the CAN bus.

[0100] Based on the same inventive concept, in the second aspect, please refer to Figure 4 The present application provides an EPB controller sleep control system, including a power request signal sending control module 100, an EPB controller suspension control module 200 and an EPB controller sleep control module 300, wherein the power request signal sending control module is used to control the sending of a power request signal after the power-on wake-up circuit of the EPB controller is powered off; the EPB controller suspension control module is communicated with the power request signal sending control module, and is used to control the EPB controller to maintain a suspended state without entering sleep and interacting with the CAN bus when the acquired power request signal is a preset signal value; the EPB controller sleep control module is communicated with the power request signal sending control module, and is used to control the EPB controller to enter a sleep state when the acquired power request signal is not a preset signal value.

[0101] The present application provides an EPB controller sleep control system. After the EPB controller power-on wake-up circuit is powered off, the EPB controller does not directly go into sleep, but enters a suspended state. In the suspended state, the EPB controller does not interact with the CAN bus signal, does not wake up other controllers of the vehicle, and maintains a low power consumption state, avoiding the risk of power supply to the vehicle due to waking up other controllers and the waste of electricity in the process of waking up other controllers, which affects the vehicle's cruising range.

[0102] In one embodiment, the power supply request signal sending control module includes a vehicle operating condition acquisition submodule and a power supply request signal acquisition submodule. The vehicle operating condition acquisition submodule is used to obtain the vehicle's operating condition when the power-on wake-up circuit of the EPB controller is powered off; the power supply request signal acquisition submodule is communicatively connected to the vehicle operating condition acquisition submodule, and is used to control the sending of the power supply request signal according to the vehicle's operating condition.

[0103] In one embodiment, the power supply request signal acquisition submodule includes a vehicle operating condition acquisition unit, a first power supply signal acquisition unit, and a second power supply signal acquisition unit, wherein the vehicle operating condition acquisition unit is used to acquire the following operating conditions:

[0104] Working condition 1: the vehicle slope is greater than the first slope value and the rear brake disc temperature is greater than the preset temperature. Under this working condition, the vehicle is in a sliding state and the rear brake disc is in a high temperature state. The EPB controller needs to activate the high temperature re-clamping function;

[0105] Working condition 2: The EPB control power supply line is accidentally disconnected. In this working condition, for the parking safety of the whole vehicle, the EPB controller's unexpected power-off logic will be triggered, and the brake disc temperature model in the controller will be set to 500°C. Therefore, the EPB controller needs to activate the high-temperature re-clamping function;

[0106] Working condition 3: the vehicle slope is greater than the second slope value. Under this working condition, the EPB controller will trigger the rolling re-clamp function to ensure parking safety.

[0107] The first power supply signal acquisition unit is in communication connection with the vehicle operating condition acquisition unit, and is used to control the sending of a power supply request signal with a preset signal value when the vehicle operating condition meets operating condition 1, operating condition 2, or operating condition 3:

[0108] The second power supply signal acquisition unit is communicatively connected to the vehicle operating condition acquisition unit, and is used to control the sending of a power supply request signal with a non-preset signal value when the vehicle operating condition does not meet the operating condition 1, the operating condition 2 and the operating condition 3.

[0109] Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, all or part of the method steps of the above method are implemented.

[0110] The present invention implements all or part of the process in the above method, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of each method embodiment can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electric carrier signals and telecommunication signals.

[0111] Based on the same inventive concept, an embodiment of the present application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program running on the processor, and when the processor executes the computer program, all or part of the method steps in the above method are implemented.

[0112] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of a computer device, and uses various interfaces and lines to connect various parts of the entire computer device.

[0113] The memory can be used to store computer programs and / or modules. The processor realizes various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, video data, etc.). In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0114] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, servers or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program codes.

[0115] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), servers, and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as a combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0116] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0117] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0118] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A sleep control method for an EPB controller, characterized in that: The following steps are involved: When the power-on wake-up circuit of the EPB controller is powered off, the control sends a power request signal; When the acquired power supply request signal is a preset signal value, the EPB controller is controlled to maintain a suspended state without entering sleep mode and without interacting with the CAN bus; When the acquired power supply request signal is not a preset signal value, the EPB controller is controlled to enter a dormant state; After the step of controlling the EPB controller to maintain a suspended state without entering sleep mode and without interacting with the CAN bus when the acquired power supply request signal is a preset signal value, the following steps are also included: When the acquired power supply request signal is a preset signal value, the EPB controller is controlled to maintain a suspended state without entering sleep mode and without interacting with the CAN bus; Obtain vehicle acceleration through the acceleration sensor built into the EPB controller; According to the obtained vehicle acceleration, the slope sliding condition of the vehicle is obtained; When the vehicle is in a sliding state, the EPB caliper is controlled to perform a clamping operation.

2. The EPB controller sleep control method according to claim 1, characterized in that: The step of controlling the sending of a power supply request signal after the power-on wake-up circuit of the EPB controller is powered off specifically includes the following steps: When the power-on wake-up circuit of the EPB controller is powered off, the operating condition of the vehicle is obtained; According to the operating conditions of the vehicle, the control sends a power supply request signal.

3. The EPB controller sleep control method according to claim 2, characterized in that: The step of controlling the sending of the power supply request signal according to the operating condition of the vehicle specifically comprises the following steps: When the vehicle operating condition meets condition 1, condition 2 or condition 3, the control sends a power supply request signal with a preset signal value: Working condition 1: the vehicle slope is greater than the first slope value and the rear brake disc temperature is greater than the preset temperature; Working condition 2: EPB control power supply line is accidentally disconnected; Working condition 3: the vehicle slope is greater than the second slope value; Wherein, the second slope value is greater than the first slope value; When the vehicle operating condition does not conform to condition 1, condition 2, and condition 3, the control sends a power supply request signal with a non-preset signal value.

4. The EPB controller sleep control method according to claim 1, characterized in that: The step of obtaining the vehicle's rolling downhill condition according to the obtained vehicle acceleration specifically includes the following steps: When the acquired acceleration variation is greater than the first acceleration fluctuation threshold and the duration exceeds a preset period, it is determined that the vehicle is in a slow slope sliding state; When the acquired acceleration variation is greater than the second acceleration fluctuation amount threshold, and the acceleration fluctuation frequency is greater than the fluctuation frequency threshold, it is determined that the vehicle is in a fast rolling downhill state; The first acceleration fluctuation threshold is smaller than the second acceleration fluctuation threshold.

5. The EPB controller sleep control method according to claim 1, characterized in that: After the step of controlling the EPB controller to maintain a suspended state without entering sleep mode and without interacting with the CAN bus when the acquired power supply request signal is a preset signal value, the following steps are also included: Obtain the operating conditions of the vehicle; According to the operating conditions of the vehicle, the EPB controller is controlled to execute different post-suspend sleep strategies.

6. The EPB controller sleep control method according to claim 5, characterized in that: After the step of controlling the EPB controller to execute different post-suspend sleep strategies according to the operating conditions of the vehicle, the following steps are also included: When the temperature of the rear brake disc is lower than a preset temperature value and the EPB caliper performs a rolling re-clamping operation for more than a preset time, controlling the sending of a power supply request signal of a non-preset signal value; When the acquired power supply request signal is not a preset signal value, the EPB controller is controlled to enter a sleep state.

7. The EPB controller sleep control method according to claim 5, characterized in that: After the step of controlling the EPB controller to execute different post-suspend sleep strategies according to the operating conditions of the vehicle, the following steps are also included: When the temperature of the rear brake disc is not lower than a preset temperature value or the rolling re-clamping operation time of the EPB caliper does not exceed a preset time, the EPB controller is controlled to maintain a suspended state without entering sleep mode and interacting with the CAN bus.

8. An EPB controller sleep control system, characterized in that: include: A power supply request signal sending control module, used for controlling the sending of a power supply request signal after the power-on wake-up circuit of the EPB controller is powered off; An EPB controller suspension control module is communicatively connected with the power supply request signal sending control module, and is used to control the EPB controller to maintain a suspension state without entering sleep mode and interacting with the CAN bus when the acquired power supply request signal is a preset signal value; An EPB controller sleep control module, which is in communication with the power supply request signal sending control module and is used to control the EPB controller to enter a sleep state when the acquired power supply request signal is not a preset signal value; The EPB controller suspension control module is used to control the EPB controller to maintain a suspension state without entering sleep mode and without interacting with the CAN bus when the acquired power supply request signal is a preset signal value, and further includes: When the acquired power supply request signal is a preset signal value, the EPB controller is controlled to maintain a suspended state without entering sleep mode and without interacting with the CAN bus; Obtain vehicle acceleration through the acceleration sensor built into the EPB controller; According to the obtained vehicle acceleration, the slope sliding condition of the vehicle is obtained; When the vehicle is in a sliding state, the EPB caliper is controlled to perform a clamping operation.

9. The EPB controller sleep control system according to claim 8, characterized in that: The power supply request signal sending control module includes: The vehicle operating condition acquisition submodule is used to obtain the vehicle operating condition after the power-on wake-up circuit of the EPB controller is powered off; The power supply request signal acquisition submodule is communicatively connected to the vehicle operating condition acquisition submodule, and is used to control the sending of the power supply request signal according to the operating condition of the vehicle.

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