Electromechanical brake-by-wire system, parking control method and vehicle

Abstract

The present disclosure relates to an electromechanical brake-by-wire system, a parking control method and a vehicle. A switch module is additionally arranged between a locking mechanism driving module and a power supply. A control module of the electromechanical brake-by-wire system is configured to: in response to a parking control request signal, control the switch module to be turned on, so that the power supply supplies power to the locking mechanism driving module, the parking control request signal being a parking request signal or a parking release request signal; send a driving control signal corresponding to the parking control request signal to the locking mechanism driving module, the driving control signal being used to instruct the locking mechanism driving module to drive a motor locking module to perform a target operation corresponding to the parking control request signal; and control the switch module to be turned off after the motor locking module performs the target operation. By controlling the switch module to be turned on and turned off, the present disclosure avoids the motor locking module from performing unintended locking and unlocking of an EMB motor, thereby improving driving safety.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle control technology, specifically to an electromechanical brake-by-wire system, a parking control method, and a vehicle. Background Technology

[0002] The vehicle's EMB (Electronic Mechanical Brake) system integrates both driving and parking functions. The vehicle uses the same EMB caliper for both driving and parking, and the EMB caliper is controlled by an EMB motor.

[0003] After the vehicle is powered off, the EMB caliper will automatically release due to its mechanical structure. The EMB system includes a motor locking module. The MCU (Microcontroller Unit) in the EMB system drives this motor locking module via an H-bridge pre-drive chip (including the driver chip and H-bridge circuit) to lock the EMB motor or its transmission mechanism when the vehicle is powered off, thereby preventing the EMB caliper from releasing. If the motor locking module locks unexpectedly, the EMB motor may only be able to clamp the caliper but not release it, potentially leading to a safety accident. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this disclosure provides an electromechanical brake-by-wire system, a parking control method, and a vehicle.

[0005] In a first aspect, this disclosure provides an electromechanical brake-by-wire system for a vehicle, including a control module, a locking mechanism drive module, and a switch module, wherein the control module is connected to the locking mechanism drive module and the switch module, and the switch module is connected to the locking mechanism drive module and a power supply. The control module is used for: In response to a parking control request signal, the switch module is turned on so that the power supply provides power to the locking mechanism drive module. The parking control request signal is either a parking request signal or a parking release request signal. Send a drive control signal corresponding to the parking control request signal to the locking mechanism drive module. The drive control signal is used to instruct the locking mechanism drive module to drive the motor locking module to perform the target operation corresponding to the parking control request signal. After the motor locking module performs the target operation, it controls the switch module to disconnect.

[0006] Optionally, the control module is further configured to: Monitor the enable signal of the locking mechanism drive module; If the parking control request signal is not received, and the enable signal indicates that the locking mechanism drive module is powered on, a first fault information is generated.

[0007] Optionally, the control module is further configured to: Monitor the status control signal of the switching module; A second fault message is generated when the state control signal indicates that the switch module is off and the enable signal indicates that the locking mechanism drive module is powered on, or when the state control signal indicates that the switch module is on and the enable signal indicates that the locking mechanism drive module is not powered on.

[0008] Optionally, the control module is further configured to: Monitor the parking status of the vehicle; When the parking state indicates that the vehicle is not parked and the parking request signal has not been received, and / or when the parking state indicates that the vehicle is parked and the parking release request signal has not been received, if the enable signal indicates that the locking mechanism drive module is powered on, a preset safety strategy is executed. The preset safety strategy includes determining the target historical state of the motor locking module and generating the parking control request signal to restore the motor locking module to the target historical state.

[0009] Optionally, the electromechanical wire braking system further includes an electromechanical wire braking EMB motor, the EMB motor being used to clamp or release the caliper; The control module is also used for: Monitor the position signal of the EMB motor; If the parking status indicates that the vehicle is parked and no parking release request signal has been received, and the position signal indicates a change in the position of the EMB motor, the preset safety strategy is executed.

[0010] Optionally, the H-bridge pre-drive chip included in the locking mechanism drive module has a vehicle safety integrity level lower than Class D.

[0011] Secondly, this disclosure provides a parking control method applied to a vehicle's electromechanical brake-by-wire system. The electromechanical brake-by-wire system includes a locking mechanism drive module and a switch module. The switch module is connected to the locking mechanism drive module and a power supply, respectively. The parking control method includes: In response to a parking control request signal, the switch module is turned on so that the power supply provides power to the locking mechanism drive module. The parking control request signal is either a parking request signal or a parking release request signal. Send a drive control signal corresponding to the parking control request signal to the locking mechanism drive module. The drive control signal is used to instruct the locking mechanism drive module to drive the motor locking module to perform the target operation corresponding to the parking control request signal. After the motor locking module performs the target operation, it controls the switch module to disconnect.

[0012] Optionally, the parking control method further includes: Monitor the enable signal of the locking mechanism drive module and the state control signal of the switch module; If the enable signal indicates that the locking mechanism drive module is powered on, and the parking control request signal is not received, a first fault message is generated. A second fault message is generated when the state control signal indicates that the switch module is off and the enable signal indicates that the locking mechanism drive module is powered on, or when the state control signal indicates that the switch module is on and the enable signal indicates that the locking mechanism drive module is not powered on.

[0013] Optionally, the parking control method further includes: Monitor the parking status of the vehicle and the position signal of the EMB motor in the electromechanical brake-by-wire system; When the parking state indicates that the vehicle is not parked and the parking request signal has not been received, and / or when the parking state indicates that the vehicle is parked and the parking release request signal has not been received, if the enable signal indicates that the locking mechanism drive module is powered on, a preset safety strategy is executed. If the parking status indicates that the vehicle is parked and no parking release request signal has been received, and the position signal indicates a change in the position of the EMB motor, the preset safety strategy is executed. The preset safety strategy includes determining the target historical state of the motor locking module and generating the parking control request signal to restore the motor locking module to the target historical state.

[0014] Thirdly, this disclosure provides a vehicle including the electromechanical brake-by-wire system described in the first aspect.

[0015] Through the above technical solution, this disclosure adds a switch module between the locking mechanism drive module and the power supply. When it is necessary to control the locking mechanism drive module, the control module of the EMB system controls the switch module to be turned on, so that the external power supply supplies power to the locking mechanism drive module, and then sends the corresponding drive control signal to the locking mechanism drive module to drive the motor locking module to perform the target operation on the EMB motor. After the motor locking module has completed the target operation, the control module controls the switch module to be turned off, so that the external power supply stops supplying power to the locking mechanism drive module. This ensures that the locking mechanism drive module stops working during the time when no parking control request signal is received, avoiding the motor locking module from locking and unlocking the EMB motor unexpectedly, and improving driving safety.

[0016] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the first module of the EMB system in an embodiment of this disclosure; Figure 2 This is a schematic diagram of the second module of the EMB system in an embodiment of this disclosure; Figure 3 This is a flowchart illustrating the parking control method in an embodiment of this disclosure; Figure 4 This is a schematic diagram of the structure of a computer device in an embodiment of this disclosure. Detailed Implementation

[0018] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0019] It should be noted that the illustrations provided in the embodiments of this disclosure are merely schematic representations of the basic concept of this disclosure. The figures only show components relevant to this disclosure and are not drawn according to the actual number, shape, and size of components in implementation. In actual implementation, the shape, quantity, and proportion of each component can be arbitrarily changed, and the component layout may also be more complex. The structures, proportions, sizes, etc., depicted in the accompanying drawings are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the implementation conditions of this disclosure. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that this disclosure can produce, should still fall within the scope of the technical content disclosed in this disclosure. At the same time, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this disclosure. Changes or adjustments in their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this disclosure.

[0020] In one embodiment, such as Figure 1 As shown, the EMB system for vehicles provided in this disclosure includes a control module 100, a locking mechanism drive module 200, and a switch module 300. The control module 100 is connected to the locking mechanism drive module 200 and the switch module 300, respectively. The switch module 300 is connected to the locking mechanism drive module 200 and the power supply 301, respectively.

[0021] The locking mechanism drive module 200 is connected to the motor locking module 201. The motor locking module 201 is used to lock or unlock the EMB motor 400, which is used to clamp or release the caliper 401. Locking the EMB motor 400 after it clamps the caliper 401 maintains the parking state and prevents the caliper 401 from automatically releasing after the vehicle is powered off. Unlocking the EMB motor 400 and releasing the caliper 401 releases the parking state.

[0022] Control module 100 is used for: In response to the parking control request signal, the control switch module 300 is turned on so that the power supply 301 supplies power to the locking mechanism drive module 200. The parking control request signal is either a parking request signal or a parking release request signal. Send a drive control signal corresponding to the parking control request signal to the locking mechanism drive module 200. The drive control signal is used to instruct the locking mechanism drive module 200 to drive the motor locking module 201 to perform the target operation corresponding to the parking control request signal. After the motor locking module 201 performs the target operation, the control switch module 300 is disconnected.

[0023] In this embodiment, a switch module 300 and an external power supply 301 are added to the locking mechanism drive module 200. When the locking mechanism drive module 200 needs to be controlled, the control module 100 of the EMB system controls the switch module 300 to be turned on, so that the external power supply 301 supplies power to the locking mechanism drive module 200. Then, a corresponding drive control signal is sent to the locking mechanism drive module 200 to drive the motor locking module 201 to perform the target operation on the EMB motor 400. After the motor locking module 201 has completed the target operation, the control module 100 controls the switch module 300 to be turned off, so that the external power supply 301 stops supplying power to the locking mechanism drive module 200. This ensures that the locking mechanism drive module 200 stops working during the time when no parking control request signal is received, avoiding the motor locking module 201 from performing unexpected locking and unlocking of the EMB motor 400, and improving driving safety.

[0024] For example, see Figure 2 The EMB system also includes an EMB drive module 402 and an EMB motor 400. The EMB drive module 402 is used to drive the EMB motor 400 to clamp or release the caliper 401.

[0025] The control module 100 can be an MCU (Microcontroller Unit) connected to the EMB driver module 402. The MCU is powered by the power supply module 101 and receives parking control request signals from the vehicle controller 103 via the CAN (bus) transceiver 102.

[0026] The 100MCU control module is specifically used for: In response to the parking control request signal, the control switch module 300 is turned on; Obtain the vehicle's parking status; If the parking status indicates that the vehicle is parked and the parking control request signal is a parking release request signal, a first drive control signal is sent to the locking mechanism drive module 200. The first drive control signal is used to instruct the locking mechanism drive module 200 to drive the motor locking module 201 to unlock the EMB motor 400, and control the EMB drive module 402 to drive the EMB motor 400 to release the caliper 401 until the release distance of the caliper 401 reaches a preset distance threshold. If the parking status indicates that the vehicle has been released from parking and the parking control request signal is a parking request signal, the EMB drive module 402 is controlled to drive the EMB motor 400 to clamp the caliper 401 until the clamping force of the caliper 401 reaches the parking force threshold (which can be detected by a force sensor). Then, a second drive control signal is sent to the locking mechanism drive module 200. The second drive control signal is used to instruct the locking mechanism drive module 200 to drive the motor locking module 201 to lock the EMB motor 400.

[0027] In one embodiment, the control module 100 is further configured to: Monitor the enable signal of the locking mechanism drive module 200; If no parking control request signal is received, and the enable signal indicates that the locking mechanism drive module 200 is powered on, the first fault information is generated.

[0028] For example, the EMB system also includes an enable signal acquisition module for acquiring the enable signal of the locking mechanism drive module 200. If the control module 100 detects that the enable signal indicates that the locking mechanism drive module 200 is powered on when it does not receive a parking control request signal, it indicates that there may be a fault. Therefore, it needs to generate corresponding first fault information and feed it back to the vehicle controller 103, such as the ECU (Electronic Control Unit).

[0029] The enable signal may include a voltage signal and / or a current signal, meaning the enable signal acquisition module may include a voltage acquisition module and / or a current acquisition module. If the control module 100 detects voltage in the locking mechanism drive module 200 through the voltage acquisition module, or detects current in the locking mechanism drive module 200 through the current acquisition module, the locking mechanism drive module 200 is considered to be energized.

[0030] In another embodiment, the locking mechanism drive module 200 includes an H-bridge pre-driver chip and an H-bridge circuit. The enable signal acquisition module includes a voltage acquisition module for acquiring the voltage signal of the locking mechanism drive module 200, and a current acquisition module for acquiring the current signal of the H-bridge circuit. That is, the enable signal of the locking mechanism drive module 200 includes the voltage signal of the locking mechanism drive module 200 and / or the current signal of the H-bridge circuit in the locking mechanism drive module 200.

[0031] In one embodiment, the control module 100 is further configured to: Monitor the status control signals of the switch module 300; A second fault message is generated when the state control signal characterization switch module 300 is off and the enable signal characterization locking mechanism drive module 200 is on, or when the state control signal characterization switch module 300 is on and the enable signal characterization locking mechanism drive module 200 is not on.

[0032] For example, the control module 100 controls the on / off state of the switch module 300 through high and low level signals. When the control module 100 sends a low level signal to the switch module 300, the switch module 300 is in the off state; when the control module 100 wants to send a high level signal to the switch module 300, the switch module 300 is in the on state.

[0033] When the status control signal of the switch module 300 is low, it indicates that the switch module 300 should be in the off state. If the enable signal indicates that the locking mechanism drive module 200 is powered on at this time, it means that the switch module 300 may be faulty. When the status control signal of the switch module 300 is high, it indicates that the switch module 300 should be in the on state. If the enable signal indicates that the locking mechanism drive module 200 is not powered on at this time, it means that the switch module 300 and / or the locking mechanism drive module 200 may be faulty. Therefore, it is necessary to generate corresponding second fault information and feed it back to the vehicle controller 103.

[0034] In one embodiment, the control module 100 is further configured to: Monitor the parking status of vehicles; When the parking status indicates that the vehicle is not parked and no parking request signal has been received, and / or when the parking status indicates that the vehicle is parked and no parking release request signal has been received, if the enable signal indicates that the locking mechanism drive module 200 is powered on, the preset safety strategy is executed.

[0035] The preset safety strategy includes determining the target historical state of the motor lock-up module 201 and generating a parking control request signal corresponding to the target historical state so that the motor lock-up module 201 can be restored to the target historical state. It can also generate third fault information and feed it back to the vehicle controller 103.

[0036] Understandably, if the locking mechanism drive module 200 is accidentally powered on, it may cause the motor locking module 201 to unexpectedly lock or unlock the EMB motor 400. Unexpected locking of the motor locking module 201 may result in the EMB motor 400 being clamped but unable to release, thus violating safety design. Simultaneously, the motor locking module 201 is also the parking module in the EPB (Electronic Parking Brake) system; unexpected unlocking of the motor locking module 201 will also lead to unexpected release of the EPB. Therefore, it is necessary to execute the aforementioned preset safety strategy to relock or re-unlock the motor locking module 201 to return it to its original position.

[0037] For example, if the target historical state of the motor locking module 201 is a locked state, the generated parking control request signal should be a parking request signal; if the target historical state of the motor locking module 201 is an unlocked state, the generated parking control request signal should be a parking release control signal. After generating a new parking control request signal, the control module 100 controls the switch module 300 to turn on and sends a corresponding drive control signal to the locking mechanism drive module 200, causing the locking mechanism drive module 200 to drive the motor locking module 201 back to the target historical state, and then controls the switch module 300 to turn off.

[0038] In one embodiment, the control module 100 is further configured to: Monitor the position signal of EMB motor 400; If the parking status indicates that the vehicle is parked and no parking release request signal has been received, and the position signal indicates a change in the position of the EMB motor 400, the preset safety policy will be executed.

[0039] For example, the EMB system also includes an angle sensor installed on the EMB motor 400, and the control module 100 monitors the position signal of the EMB motor 400 through the angle sensor.

[0040] If, when the vehicle is parked and no parking release request signal has been received, the position signal indicates a change in the position of the EMB motor 400, the motor locking module 201 may have performed an abnormal action. That is, if the EMB motor 400 is accidentally unlocked while it was supposed to be locked, the aforementioned preset safety strategy needs to be executed to relock the EMB motor 400 by the motor locking module 201. This prevents the motor locking module 201 from unintentionally unlocking the EMB motor 400 and from unintentionally releasing the EPB (Electronic Parking Brake) system.

[0041] ASIL (Automotive Safety Integrity Levels) are ranked from highest to lowest as ASIL D, ASIL C, ASIL B, ASIL A, and QM (Quality Management). Chips with a safety integrity level lower than D lack safety mechanisms and have a higher failure rate than ASIL D chips. Since the H-bridge pre-drive chip used to drive the motor locking module needs to meet ASIL D requirements, an ASIL D chip must be selected. However, ASIL D is the highest level of automotive functional safety, and using an ASIL D H-bridge pre-drive chip results in higher production costs.

[0042] Based on the security mechanism provided by the EMB system in the above embodiments of this disclosure, a security mechanism applicable to chips with ASIL D or lower can be established, so that the automotive safety integrity level of the H-bridge pre-drive chip used in the locking mechanism drive module 200 can be less than level D.

[0043] In one embodiment, the control module 100, the power supply module 101, and the EMB drive module 402 use ASIL D chips, and the H-bridge pre-drive chip used in the locking mechanism drive module 200 is a QM-level chip, which can also meet the ASIL D requirements. Thus, while meeting the overall ASIL D requirements, the production cost can be significantly reduced.

[0044] Based on the same inventive concept, this disclosure also provides a parking control method applied to the aforementioned EMB system. For example... Figure 3 As shown, the parking control methods include: S1. In response to the parking control request signal, the control switch module is turned on so that the power supply can power the locking mechanism drive module. The parking control request signal is either a parking request signal or a parking release request signal. S2. Send the drive control signal corresponding to the parking control request signal to the locking mechanism drive module. The drive control signal is used to instruct the locking mechanism drive module to drive the motor locking module to perform the target operation corresponding to the parking control request signal. S3. After the motor locking module performs the target operation, the control switch module is disconnected.

[0045] In one embodiment, the parking control method further includes: Monitor the enable signal of the locking mechanism drive module; If no parking control request signal is received, and the enable signal indicates that the locking mechanism drive module is powered on, the first fault information is generated.

[0046] In one embodiment, the parking control method further includes: Monitor the status control signals of the switch module; A second fault message is generated when the state control signal characterizing the switch module is off and the enable signal characterizing the locking mechanism drive module is on, or when the state control signal characterizing the switch module is on and the enable signal characterizing the locking mechanism drive module is off.

[0047] In one embodiment, the parking control method further includes: Monitor the parking status of vehicles; When the parking status indicates that the vehicle is not parked and no parking request signal has been received, and / or when the parking status indicates that the vehicle is parked and no parking release request signal has been received, if the enable signal indicates that the locking mechanism drive module is powered on, the preset safety strategy is executed. The preset safety strategy includes determining the target historical state of the motor locking module and generating a parking control request signal to restore the motor locking module to the target historical state.

[0048] In one embodiment, the parking control method further includes: Monitor the position signal of the EMB motor; If the parking status indicates that the vehicle is parked and no parking release request signal has been received, and the position signal indicates a change in the position of the EMB motor, the preset safety policy will be executed.

[0049] In summary, in order to use an ASIL D-compliant chip for the H-bridge pre-driver chip in the locking mechanism drive module, this disclosure adds the following safety mechanism to meet ASIL D requirements: (1) A switch module was added to control the connection and disconnection between the locking mechanism drive module and the power supply, thereby reducing the chip failure rate. The power supply of the locking mechanism drive module is turned on when parking or releasing the vehicle is required, and turned off at other times.

[0050] (2) Monitor the enable signal of the locking mechanism drive module and the status control signal of the switch module. If the logic of the status control signal of the switch module and the enable signal of the locking mechanism drive module is not consistent, fault feedback is required.

[0051] (3) Monitor the vehicle's parking status, the received parking control request signal, the enable signal of the locking mechanism drive module and the position signal of the EMB motor. If the locking mechanism drive module is powered on when the vehicle is not parked and no parking request signal is received, or if the locking mechanism drive module is powered on or the position of the EMB motor changes when the vehicle is parked and no parking release request signal is received, then execute the preset safety strategy to restore the motor locking module to its original state and provide fault feedback.

[0052] This disclosure also provides a computer device. In one embodiment, the computer device 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, it implements the steps of the parking control method described above.

[0053] In one embodiment, the computer device may be a terminal, and its internal structure diagram may be as follows: Figure 4As shown. The computer device may include one or more of a processor, memory, network interface, display screen, and input device connected via a system bus. The processor of the computer device provides computing and control capabilities. The memory of the computer device includes non-volatile storage media and internal memory. The non-volatile storage media stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface of the computer device is used to communicate with external terminals via a network connection. When the computer program is executed by the processor, it implements the steps of the parking control method in the above embodiments. The display screen of the computer device may be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device may be a touch layer covering the display screen, or buttons, a trackball, or a touchpad provided on the casing of the computer device, or an external keyboard, touchpad, or mouse, etc. For example, the computer device may be an in-vehicle terminal in a vehicle.

[0054] Those skilled in the art will understand that Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present disclosure and does not constitute a limitation on the computer device to which the present disclosure is applied. A specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0055] Based on the same inventive concept, this disclosure also provides a vehicle including the aforementioned EMB system. Specific limitations regarding the EMB system can be found above and will not be repeated here.

[0056] This disclosure also provides a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, implement the steps of the parking control method in the above embodiments.

[0057] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this disclosure can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0058] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0059] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0060] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. An electromechanical brake-by-wire system for a vehicle, characterized in that, It includes a control module, a locking mechanism drive module, and a switch module. The control module is connected to the locking mechanism drive module and the switch module, and the switch module is connected to the locking mechanism drive module and a power supply. The control module is used for: In response to a parking control request signal, the switch module is turned on so that the power supply provides power to the locking mechanism drive module. The parking control request signal is either a parking request signal or a parking release request signal. Send a drive control signal corresponding to the parking control request signal to the locking mechanism drive module. The drive control signal is used to instruct the locking mechanism drive module to drive the motor locking module to perform the target operation corresponding to the parking control request signal. After the motor locking module performs the target operation, it controls the switch module to disconnect.

2. The electromechanical linear braking system according to claim 1, characterized in that, The control module is also used for: Monitor the enable signal of the locking mechanism drive module; If the parking control request signal is not received, and the enable signal indicates that the locking mechanism drive module is powered on, a first fault information is generated.

3. The electromechanical linear braking system according to claim 2, characterized in that, The control module is also used for: Monitor the status control signal of the switching module; A second fault message is generated when the state control signal indicates that the switch module is off and the enable signal indicates that the locking mechanism drive module is powered on, or when the state control signal indicates that the switch module is on and the enable signal indicates that the locking mechanism drive module is not powered on.

4. The electromechanical linear braking system according to claim 2, characterized in that, The control module is also used for: Monitor the parking status of the vehicle; When the parking state indicates that the vehicle is not parked and the parking request signal has not been received, and / or when the parking state indicates that the vehicle is parked and the parking release request signal has not been received, if the enable signal indicates that the locking mechanism drive module is powered on, a preset safety strategy is executed. The preset safety strategy includes determining the target historical state of the motor locking module and generating the parking control request signal to restore the motor locking module to the target historical state.

5. The electromechanical linear braking system according to claim 4, characterized in that, The electromechanical wire braking system also includes an electromechanical wire braking EMB motor, which is used to clamp or release the caliper. The control module is also used for: Monitor the position signal of the EMB motor; If the parking status indicates that the vehicle is parked and no parking release request signal has been received, and the position signal indicates a change in the position of the EMB motor, the preset safety strategy is executed.

6. The electromechanical wire braking system according to any one of claims 1-5, characterized in that, The locking mechanism drive module includes an H-bridge pre-drive chip with a vehicle safety integrity level lower than D.

7. A parking control method, characterized in that, An electromechanical brake-by-wire system for vehicles, comprising a locking mechanism drive module and a switch module, wherein the switch module is connected to the locking mechanism drive module and a power supply respectively, and the parking control method includes: In response to a parking control request signal, the switch module is turned on so that the power supply provides power to the locking mechanism drive module. The parking control request signal is either a parking request signal or a parking release request signal. Send a drive control signal corresponding to the parking control request signal to the locking mechanism drive module. The drive control signal is used to instruct the locking mechanism drive module to drive the motor locking module to perform the target operation corresponding to the parking control request signal. After the motor locking module performs the target operation, it controls the switch module to disconnect.

8. The parking control method according to claim 7, characterized in that, Also includes: Monitor the enable signal of the locking mechanism drive module and the state control signal of the switch module; If the enable signal indicates that the locking mechanism drive module is powered on, and the parking control request signal is not received, a first fault message is generated. A second fault message is generated when the state control signal indicates that the switch module is off and the enable signal indicates that the locking mechanism drive module is powered on, or when the state control signal indicates that the switch module is on and the enable signal indicates that the locking mechanism drive module is not powered on.

9. The parking control method according to claim 8, characterized in that, Also includes: Monitor the parking status of the vehicle and the position signal of the EMB motor in the electromechanical brake-by-wire system; When the parking state indicates that the vehicle is not parked and the parking request signal has not been received, and / or when the parking state indicates that the vehicle is parked and the parking release request signal has not been received, if the enable signal indicates that the locking mechanism drive module is powered on, a preset safety strategy is executed. If the parking status indicates that the vehicle is parked and no parking release request signal has been received, and the position signal indicates a change in the position of the EMB motor, the preset safety strategy is executed. The preset safety strategy includes determining the target historical state of the motor locking module and generating the parking control request signal to restore the motor locking module to the target historical state.

10. A vehicle, characterized in that, Including the electromechanical linear braking system as described in any one of claims 1 to 6.

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