A brake control system and brake control method with single-sided EPB redundancy

Abstract

The embodiment of the application discloses a kind of single side EPB redundant brake control systems, including: EPB control unit, line control brake unit, EPB switch interface circuit, wheel speed interface circuit and power end;Line control brake unit includes line control brake chip and first CAN communication module;EPB control unit includes EPB control chip and second CAN communication module;EPB control chip and / or line control brake chip are electrically connected with wheel speed interface circuit;First power end and second power end are electrically connected with first motor drive module, second motor drive module respectively by first switch module and second switch module, when detecting that part of device in EPB control unit fails, the brake system control line control brake unit enters EPB control state.The embodiment of the application realizes complete EPB function on onebox, cancels independent EPB controller, and then realizes single side redundant control, and also reduce the manufacturing cost of control module.

Description

Technical Field

[0001] This invention relates to the field of chassis control technology, and in particular to a single-sided EPB redundant braking control system and braking control method. Background Technology

[0002] Currently, automotive hydraulic braking systems are increasingly adopting an integrated design that combines the booster (electronic brake assist) and ESC (Electronic Stability Control) into a single unit. This achieves conventional braking and stability control functions while offering cost and weight advantages. This configuration is known as an "integrated brake-by-wire system"—onebox. Integrated brake-by-wire systems are a pressing need for automotive chassis systems in the context of new energy vehicles and autonomous driving in recent years, and also represent a hot topic in braking system development.

[0003] Besides the one-box approach, the current market offers braking solutions such as eBooster, two-box, independent EPB, and ESC; each solution has its own advantages and disadvantages. Designing a solution with higher integration, greater stability, and lower cost has become a pressing technical problem for those skilled in the art. Summary of the Invention

[0004] This invention provides a single-sided EPB redundant braking control system that can replace an independent EPB controller. The braking system has a high degree of overall control integration and relatively low cost.

[0005] In a first aspect, embodiments of the present invention provide a single-sided EPB redundant braking control system, comprising:

[0006] A brake-by-wire unit, comprising a brake-by-wire chip and a first CAN communication module; the first CAN communication module is electrically connected to the brake-by-wire chip;

[0007] The EPB control unit includes an EPB control chip and a second CAN communication module; the second CAN communication module is electrically connected to the EPB control chip, and the EPB control chip is electrically connected to a second EPB motor through a second motor drive module.

[0008] The EPB switch interface circuit, wherein the EPB control chip or line control brake chip is electrically connected to the EPB switch interface circuit;

[0009] Wheel speed interface circuit, wherein the EPB control chip and / or brake-by-wire chip are electrically connected to the wheel speed interface circuit;

[0010] The EPB control switching module is electrically connected to both the brake-by-wire chip and the EPB control chip. The EPB control switching module is electrically connected to the first EPB motor through the first motor drive module.

[0011] The power supply terminal includes a first power supply terminal and a second power supply terminal; the first power supply terminal and the second power supply terminal are electrically connected to the first motor drive module and the second motor drive module respectively through the first switch module and the second switch module. When the failure of some components in the EPB control unit is detected, the brake control system controls the brake unit to enter the EPB control state.

[0012] As an optional implementation, in the first aspect of the present invention, the EPB control unit further includes a second SBC module electrically connected to the EPB control chip, and the second SBC module is electrically connected to a second power supply terminal.

[0013] The brake-by-wire unit further includes a first SBC module electrically connected to the brake-by-wire chip, and the first SBC module is electrically connected to a first power supply terminal.

[0014] The above discloses a power detection method using an SBC module, which can improve the safety and stability of the power supply of the module by setting up the SBC module.

[0015] As an optional implementation, in the first aspect of the present invention, a first switching device, a second switching device, and a third switching device are further included. The first power supply terminal is connected to the input pin of the first switching device, the permanent magnet brushless motor drive module is connected to the output pin of the first switching device, and the linear braking chip is connected to the control pin of the first switching device to control the on / off state between the input pin and the output pin of the first switching device.

[0016] The second power supply terminal is connected to the input pin of the second switching device, the solenoid valve drive module is connected to the output pin of the second switching device, and the EPB control chip is connected to the control pin of the second switching device to control the on / off state between the input pin and the output pin of the second switching device.

[0017] The output pin of the second switching device is connected to the input pin of the third switching device, the input pin of the first switching device is connected to the output pin of the third switching device, and the EPB control chip is connected to the control pin of the third switching device to control the on / off state between the input pin and the output pin of the third switching device.

[0018] By configuring specific switching devices and their connections with other devices in the braking control system, the switching control of corresponding devices is achieved, thereby improving the convenience and stability of the overall control.

[0019] As an optional implementation, in the first aspect of the present invention, the first switch module is a fourth switch device, the second switch module is a fifth switch device, the first power supply terminal is connected to the input pin of the fourth switch device, the output pin of the fifth switch device is connected to the output pin of the fourth switch device, and the EPB control chip is connected to the control pin of the fourth switch device to control the on / off state between the input pin and the output pin of the fourth switch device.

[0020] The second power supply terminal is connected to the input pin of the fifth switching device, the output pin of the fifth switching device is connected to the second motor drive module, and the line control brake chip is connected to the control pin of the fifth switching device to control the on / off state between the input pin and the output pin of the fifth switching device.

[0021] By configuring specific switching devices and their connections with other devices in the braking control system, the switching control of corresponding devices can be achieved, thereby improving the overall control convenience.

[0022] As an optional implementation, in the first aspect of the present invention, the EPB control chip is electrically connected to the brake-by-wire chip via a proprietary CAN module.

[0023] By setting up a private CAN module, data exchange between the brake-by-wire chip and the EPB control chip can be made more convenient.

[0024] As an optional implementation, in a first aspect of the present invention, the first motor drive module includes a first pre-drive module and a first bridge module electrically connected to the first pre-drive module, and the second motor drive module includes a second pre-drive module and a second bridge module electrically connected to the second pre-drive module.

[0025] Both the first bridge module and the second bridge module are H-type bridge modules.

[0026] The solution of this invention uses an EPB control module or a line-controlled braking module, which is applied to the H-bridge drive module via a pre-drive module. The pre-drive module outputs a PWM signal in real time according to the PID algorithm to control the H-bridge drive module to realize the forward and reverse rotation of the motor. The specific connection method is as follows: the EPB control module is connected to the pre-drive module, the pre-drive module is connected to the H-bridge drive module, and the H-bridge drive module is connected to the corresponding EPB motor.

[0027] As an optional implementation, in the first aspect of the present invention, the first SBC module and the second SBC module are further configured to receive an ignition signal sent by the ignition switch module.

[0028] As an optional implementation, in the first aspect of the present invention, the EPB control chip is of model TC234 or TC277, and the EPB control unit and the brake-by-wire unit are integrated.

[0029] The specific chip model was disclosed above, and the integration of the EPB control unit and the brake-by-wire unit was improved. Furthermore, in practical implementation, the performance of the brake-by-wire chip can be higher than that of the EPB control chip because its functional requirements are higher; this integrated setup enables redundant EPB control.

[0030] As an optional implementation, in the first aspect of the present invention, the EPB control unit further includes a first storage module electrically connected to the EPB control chip, and the brake-by-wire unit further includes a second storage module electrically connected to the brake-by-wire chip.

[0031] A storage module can be set up to store the corresponding settings program to achieve more diverse functions.

[0032] As an optional implementation, in the first aspect of the present invention, the brake-by-wire unit further includes a permanent magnet brushless motor drive module and a solenoid valve drive module. The brake-by-wire unit is also used to control the operating state of the permanent magnet brushless motor and the solenoid valve through the permanent magnet brushless motor drive module and the solenoid valve drive module. This structure allows the user to achieve better vehicle-assisted braking. In specific implementation, this structure is primarily driven by the brake-by-wire unit, while the EPB control unit cannot drive the permanent magnet brushless motor and the solenoid valve to complete the corresponding actions. When the EPB control unit receives a dynamic EPB pull-up request, the brake-by-wire unit will activate, providing corresponding dynamic braking.

[0033] In a second aspect, embodiments of the present invention provide a method for braking control with unilateral EPB redundancy, comprising:

[0034] If a fault is detected in the EPB control chip and / or the first CAN communication module at the EPB control unit;

[0035] The control line controls the actuator to enter the working state for single-sided EPB redundant control.

[0036] This invention implements complete EPB functionality on a onebox, eliminating the need for a separate EPB controller and thus achieving single-sided redundant control, thereby reducing the manufacturing cost of the control module. The solution of this invention ensures redundancy in the power input, power management module, wheel speed input, CAN communication module, and MCU module of the brake-by-wire system. This ensures that any single point of failure in the system will not affect the integrity of the static EPB function, nor will it affect the EPB service braking function; thus improving overall safety. Attached Figure Description

[0037] Figure 1 This is a circuit block diagram of the EPB motor drive provided in an embodiment of the present invention;

[0038] Figure 2 This is a circuit diagram of the brake-by-wire unit provided in an embodiment of the present invention;

[0039] Figure 3 This is a circuit schematic diagram of the redundant EPB module provided in an embodiment of the present invention;

[0040] Figure 4 This is a circuit diagram of the H-type bridge module provided in an embodiment of the present invention;

[0041] Figure 5 This is a schematic flowchart of the braking control method with unilateral EPB redundancy provided in an embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the present invention clearer, specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are all commercially available. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0044] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0047] Example 1

[0048] like Figures 1-4 As shown, an embodiment of the present invention provides a single-sided EPB redundant braking control system, comprising:

[0049] A brake-by-wire unit, comprising a brake-by-wire chip and a first CAN communication module; the first CAN communication module is electrically connected to the brake-by-wire chip;

[0050] The EPB control unit includes an EPB control chip and a second CAN communication module; the second CAN communication module is electrically connected to the EPB control chip, and the EPB control chip is electrically connected to a second EPB motor through a second motor drive module.

[0051] The EPB switch interface circuit is electrically connected to the EPB control chip or the line-controlled brake chip. The EPB switch interface circuit of this embodiment has multiple configuration options and can be adjusted according to actual conditions. For example, the EPB switch interface circuit can be configured as a circuit module, and when connected to the EPB switch, the switch signal can be transmitted to the line-controlled brake chip or the EPB control chip.

[0052] The wheel speed interface circuit is electrically connected to the EPB control chip and / or the brake-by-wire chip. The wheel speed interface circuit of this embodiment has multiple configuration methods and can be adjusted according to actual conditions. For example, the wheel speed interface circuit can be configured as a circuit module, and when connected to four wheel speed lines, all signals transmitted by these four lines can be transmitted to the corresponding brake-by-wire chip or EPB control chip. Alternatively, some of the line signals from the four lines can be transmitted to the brake-by-wire chip, and the other part to the EPB control chip. Besides using a single wheel speed interface... In addition to the circuit, the wheel speed interface circuit can also be divided into a first wheel speed interface circuit and a second wheel speed interface circuit. Then, the first wheel speed interface circuit and the second wheel speed interface circuit are each matched with two wheel speed signal lines for signal transmission. When dividing the specific modules, the first wheel speed interface circuit can also be assigned to the brake-by-wire unit, and the second wheel speed interface circuit can be assigned to the EPB control unit. In this way, the first wheel speed interface circuit is connected to the two signal lines and the brake-by-wire chip, and the second wheel speed interface circuit is connected to the two signal lines and the EPB control chip.

[0053] The EPB control switching module is electrically connected to both the brake-by-wire chip and the EPB control chip. The EPB control switching module is electrically connected to the first EPB motor through the first motor drive module. In specific settings, the EPB control switching module can be set as an independent control switching module or it can be set at the brake-by-wire unit or the EPB control unit.

[0054] The power supply terminal includes a first power supply terminal and a second power supply terminal; the first power supply terminal and the second power supply terminal are electrically connected to the first motor drive module and the second motor drive module respectively through the first switch module and the second switch module. When the failure of some components in the EPB control unit is detected, the brake control system controls the brake unit to enter the EPB control state.

[0055] Existing solutions typically employ a one-box stacked EPB approach, which results in dispersed modules and higher costs. The solution in this invention eliminates the independent EPB controller, leading to cost reduction. Although a new circuit design is implemented to achieve control redundancy, the added brake-by-wire unit is less expensive than the original EPB controller and can be integrated with the EPB control unit, increasing the overall integration of the solution. This allows for more space for chassis control layout while ensuring safety redundancy.

[0056] More preferably, the EPB control unit further includes a second SBC module electrically connected to the EPB control chip, and the second SBC module is electrically connected to a second power supply terminal;

[0057] The brake-by-wire unit further includes a first SBC module electrically connected to the brake-by-wire chip, and the first SBC module is electrically connected to a first power supply terminal.

[0058] In this embodiment of the invention, the EPB master control unit is an EPB control unit (including MCU2 and SBC2, where MCU2 is the aforementioned EPB control chip and SBC2 is the aforementioned second SBC module), and the redundant control unit is a onebox (including MCU1 and SBC1, where MCU1 is the aforementioned brake-by-wire chip and SBC1 is the aforementioned first SBC module). The EPB master control unit controls two EPB actuators. In case of a failure, the redundant control unit takes over one EPB actuator through the EPB control switching module. The EPB master control unit and the redundant control unit (i.e., the brake-by-wire unit) exchange information through private CAN communication between the MCUs. The onebox implements the brake-by-wire function. When a failure is detected in the EPB control unit, it takes over the control of the first EPB motor to ensure parking safety.

[0059] More preferably, the first SBC module and the second SBC module are also used to receive ignition signals sent by the ignition switch module.

[0060] In this embodiment of the invention, the first and second SBC modules refer to system base chips. These system base chips are independent chips that include power supply, communication, monitoring and diagnostics, safety monitoring, and GPIO. The specific configuration of each module within the SBC module is as follows: the power supply can be a linear power supply or a switching power supply; communication can include CAN, CANFD, and LIN; monitoring and diagnostics include wake-up input, watchdog timer, reset, interrupts, and failure outputs after circuit diagnosis, as well as functional safety features. In automotive electronic hardware design, power supply, communication, and some monitoring functions (such as watchdog timer / reset / timer) are implemented through multiple circuits. This not only increases the difficulty of circuit design but also hinders optimization and improvement in reliability, system cost, PCB space, and circuit power consumption. Using an SBC greatly simplifies the external circuitry because it highly integrates the basic circuit functional modules (power supply and communication) of a basic hardware system module. Furthermore, the SBC module in this embodiment of the invention can also be a power management module to distribute and manage the power input from the external battery. In this embodiment of the invention, the power supply end is mainly a port provided by the system module for connecting to the external power module to receive power from external power supply equipment.

[0061] More preferably, the linear control braking unit includes a permanent magnet brushless motor and a solenoid valve drive, and the linear control braking unit is also used to control the working state of the permanent magnet brushless motor and the solenoid valve.

[0062] In this embodiment of the invention, the brake-by-wire actuator consists of a permanent magnet brushless motor and a solenoid valve. The brake-by-wire unit primarily provides brake-by-wire control, and the permanent magnet brushless motor drives the master cylinder via a ball screw to achieve the corresponding service braking. This structure allows users to achieve better service-assisted braking. In practice, this structure is driven primarily by the brake-by-wire unit, while the EPB control unit cannot drive the permanent magnet brushless motor and solenoid valve to perform the corresponding actions. When the EPB control unit receives a dynamic EPB pull-up request, the brake-by-wire unit activates to provide the corresponding dynamic braking.

[0063] More preferably, it also includes a first switching device, a second switching device, and a third switching device, wherein the first power supply terminal is connected to the input pin of the first switching device, the permanent magnet brushless motor drive module is connected to the output pin of the first switching device, and the linear braking chip is connected to the control pin of the first switching device to control the on / off state between the input pin and the output pin of the first switching device;

[0064] The second power supply terminal is connected to the input pin of the second switching device, the solenoid valve drive module is connected to the output pin of the second switching device, and the EPB control chip is connected to the control pin of the second switching device to control the on / off state between the input pin and the output pin of the second switching device.

[0065] The output pin of the second switching device is connected to the input pin of the third switching device, the input pin of the first switching device is connected to the output pin of the third switching device, and the line control brake chip is connected to the control pin of the third switching device to control the on / off state between the input pin and the output pin of the third switching device.

[0066] The aforementioned first, second, and third switching devices are controlled by a linear braking chip. The linear braking chip outputs corresponding control commands to control the respective switching devices. By employing the aforementioned group of switching devices, a combination of multiple switching devices is achieved to precisely control the permanent magnet brushless motor drive module and the hydraulic solenoid valve drive module. The switching devices here can be switching transistors, such as MOSFETs or triodes, or other switching devices such as thyristors or relays.

[0067] More preferably, the first switch module is a fourth switch device, the second switch module is a fifth switch device, the first power supply terminal is connected to the input pin of the fourth switch device, the output pin of the fifth switch device is connected to the output pin of the fourth switch device, and the line control brake chip is connected to the control pin of the fourth switch device to control the on / off state between the input pin and the output pin of the fourth switch device.

[0068] The second power supply terminal is connected to the input pin of the fifth switching device, and the output pin of the fifth switching device is connected to the second motor drive module. The EPB control chip is connected to the control pin of the fifth switching device to control the on / off state between the input and output pins of the fifth switching device. The control of the above-mentioned switching devices is mainly to realize the power supply switching at the power supply terminal. By using the fourth and fifth switching devices, it is possible to switch to different power ports to supply power to the motor drive module.

[0069] More preferably, the EPB control chip is electrically connected to the brake-by-wire chip via a proprietary CAN module.

[0070] Specifically, the CAN bus connects different components, all of which execute the same standard protocol. This offers advantages such as high compatibility, reliable information sharing, and a reduction in the number of wiring harnesses in the vehicle. ECUs communicate through a single CAN system, rather than through complex analog signal lines, reducing errors, wiring, and costs. The CAN bus provides an access point for communication with all network ECUs, supporting centralized diagnostics, data logging, and configuration. The CAN bus has strong immunity to electrical and electromagnetic interference, making it ideal for applications with stringent safety requirements. CAN frames are prioritized by ID, ensuring that the highest-priority data can access the bus immediately without interrupting other frames. In implementation, different data is transmitted through different CAN communication modules. The common CAN module primarily transmits overall vehicle control data, facilitating information exchange with the vehicle. Private CAN modules, on the other hand, transmit specific data, such as inertial measurement data detected by the IMU (Inertial Measurement Unit). This distinction ensures more efficient and secure transmission of various information.

[0071] More preferably, the first motor drive module includes a first pre-drive module and a first bridge module electrically connected to the first pre-drive module, and the second motor drive module includes a second pre-drive module and a second bridge module electrically connected to the second pre-drive module.

[0072] Both the first bridge module and the second bridge module are H-type bridge modules.

[0073] The solution of this invention uses an EPB control module or a line-controlled braking module, which is applied to the H-bridge drive module via a pre-drive module. The pre-drive module outputs a PWM signal in real time according to the PID algorithm to control the H-bridge drive module to realize the forward and reverse rotation of the motor. The specific connection method is as follows: the EPB control module is connected to the pre-drive module, the pre-drive module is connected to the H-bridge drive module, and the H-bridge drive module is connected to the corresponding EPB motor.

[0074] like Figure 4 As shown, the motor drive circuit consists of four MOSFETs in an H-shape, hence the name H-bridge circuit. Different control effects on the intermediate motor are achieved by controlling the conduction and cutoff of the four MOSFETs. In this embodiment, an NMOS transistor is used as an example to explain the corresponding functional principle. The NMOS transistor conducts when its gate is high and cuts off when its gate is low.

[0075] Specifically, when the motor needs to be in forward rotation mode, the gates of Q1 and Q4 are controlled to be high, while Q2 and Q3 are controlled to be low. In this mode, Q1 and Q4 are turned on, and the motor rotates in the forward direction. Conversely, when the motor needs to be in reverse rotation mode, the gates of Q2 and Q3 are controlled to be high, while Q1 and Q4 are controlled to be low. In this mode, Q2 and Q3 are turned on, and the motor rotates in the reverse direction. In an H-bridge, it is absolutely forbidden for FETs on the same side (left / right side) to be turned on simultaneously, as this would cause current to bypass the motor and go directly to ground, creating a short circuit.

[0076] Specifically, the high-side and low-side driving of a MOSFET are as follows: high-side driving means the MOSFET is at the high potential end of the load; conversely, low-side driving means the MOSFET is at the low potential end of the load. The higher the drive voltage, the faster the motor speed; the higher the current, the greater the torque. When the torque is less than the load, the motor speed will decrease, and the current will increase, thus increasing the torque. When the load is very large, and the motor cannot keep up and stops rotating, the current reaches its maximum value. Special care is needed at this point, as it could potentially burn out the motor drive.

[0077] More preferably, the EPB control chip is a TC234 or TC277, and the EPB control unit and the brake-by-wire unit are integrated. Any single point of failure will not cause a loss of static EPB functionality. Any single point of failure will not affect the low-speed braking function, a typical application scenario being emergency braking during remote parking.

[0078] In practical implementation, the performance of the brake-by-wire chip can be higher than that of the EPB control chip because its functional requirements are higher; the integration of these two can achieve redundant EPB control.

[0079] More preferably, the EPB control unit further includes a first storage module electrically connected to the EPB control chip, and the brake-by-wire unit further includes a second storage module electrically connected to the brake-by-wire chip.

[0080] This solution achieves redundancy in the power input, power management module, wheel speed input, CAN communication, and MCU module for a single-sided EPB motor. The redundant EPB module can achieve vehicle braking by driving dual EPB motors.

[0081] This invention implements complete EPB functionality on a onebox, eliminating the need for a separate EPB controller and thus achieving single-sided redundant control, thereby reducing the manufacturing cost of the control module. The solution of this invention ensures redundancy in the power input, power management module, wheel speed input, CAN communication module, and MCU module of the brake-by-wire system. This ensures that any single point of failure in the system will not affect the integrity of the static EPB function, nor will it affect the EPB service braking function; thus improving overall safety.

[0082] Example 2

[0083] Please see Figure 5 ,like Figure 5 As shown, this embodiment of the invention provides a braking control method with unilateral EPB redundancy, including:

[0084] S101: If a fault is detected in the EPB control chip and / or the first CAN communication module at the EPB control unit;

[0085] S102: The control line controls the actuator to enter the working state for single-sided EPB redundant control.

[0086] Example 3

[0087] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present invention. The electronic device can be a computer, a server, etc. Of course, in certain cases, it can also be a mobile phone, tablet computer, monitoring terminal, or other smart device, as well as an image acquisition device with processing capabilities. Figure 6 As shown, the electronic device may include:

[0088] Memory 510 storing executable program code;

[0089] Processor 520 coupled to memory 510;

[0090] The processor 520 calls the executable program code stored in the memory 510 to execute some or all of the steps in the single-sided EPB redundant braking control method in Embodiment 2.

[0091] This invention discloses a computer-readable storage medium storing a computer program that causes a computer to perform some or all of the steps in the single-sided EPB redundant braking control method of Embodiment 2.

[0092] This invention also discloses a computer program product, wherein when the computer program product is run on a computer, the computer performs some or all of the steps in the single-sided EPB redundant braking control method in Embodiment 2.

[0093] This invention also discloses an application publishing platform, which is used to publish computer program products. When the computer program products are run on a computer, the computer executes some or all of the steps in the unilateral EPB redundant braking control method in Embodiment 2.

[0094] In various embodiments of the present invention, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0095] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; they can be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0096] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0097] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-accessible memory. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several requests to cause a computer device (which can be a personal computer, server, or network device, specifically a processor in the computer device) to execute some or all of the steps of the methods described in the various embodiments of the present invention.

[0098] In the embodiments provided by this invention, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information.

[0099] Those skilled in the art will understand that some or all of the steps in the various methods of the embodiments described can be implemented by a program instructing related hardware. This program can be stored in a computer-readable storage medium, including read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

[0100] The above description is merely a preferred embodiment of the present invention and the technical principles employed. The present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions that can be made by those skilled in the art will not depart from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the claims.

Claims

1. A single-sided EPB redundant braking control system, characterized in that, include: A brake-by-wire unit, comprising a brake-by-wire chip and a first CAN communication module; The first CAN communication module is electrically connected to the brake-by-wire chip; the brake-by-wire unit also includes a permanent magnet brushless motor drive module and a solenoid valve drive module, and the brake-by-wire unit is also used to control the working state of the permanent magnet brushless motor and the solenoid valve through the permanent magnet brushless motor drive module and the solenoid valve drive module; The EPB control unit includes an EPB control chip and a second CAN communication module; the second CAN communication module is electrically connected to the EPB control chip, and the EPB control chip is electrically connected to a second EPB motor through a second motor drive module. The EPB switch interface circuit, wherein the EPB control chip or line control brake chip is electrically connected to the EPB switch interface circuit; Wheel speed interface circuit, wherein the EPB control chip and / or brake-by-wire chip are electrically connected to the wheel speed interface circuit; The EPB control switching module is electrically connected to both the brake-by-wire chip and the EPB control chip. The EPB control switching module is electrically connected to the first EPB motor through the first motor drive module. The power supply terminal includes a first power supply terminal and a second power supply terminal; the first power supply terminal and the second power supply terminal are electrically connected to the first motor drive module and the second motor drive module respectively through the first switch module and the second switch module. When the failure of some components in the EPB control unit is detected, the brake control system controls the brake unit to enter the EPB control state. It also includes a first switching device, a second switching device and a third switching device. The first power supply terminal is connected to the input pin of the first switching device, the permanent magnet brushless motor drive module is connected to the output pin of the first switching device, and the linear brake chip is connected to the control pin of the first switching device to control the on / off state between the input pin and the output pin of the first switching device. The second power supply terminal is connected to the input pin of the second switching device, the solenoid valve drive module is connected to the output pin of the second switching device, and the EPB control chip is connected to the control pin of the second switching device to control the on / off state between the input pin and the output pin of the second switching device. The output pin of the second switching device is connected to the input pin of the third switching device, the input pin of the first switching device is connected to the output pin of the third switching device, and the line control brake chip is connected to the control pin of the third switching device to control the on / off state between the input pin and the output pin of the third switching device.

2. The single-sided EPB redundant braking control system according to claim 1, characterized in that, The EPB control unit also includes a second SBC module electrically connected to the EPB control chip, and the second SBC module is electrically connected to the second power supply terminal. The brake-by-wire unit further includes a first SBC module electrically connected to the brake-by-wire chip, and the first SBC module is electrically connected to a first power supply terminal.

3. The single-sided EPB redundant braking control system according to claim 2, characterized in that, The first SBC module and the second SBC module are also used to receive ignition signals sent by the ignition switch module. The first switch module is the fourth switch device, the second switch module is the fifth switch device, the first power supply terminal is connected to the input pin of the fourth switch device, the output pin of the fifth switch device is connected to the output pin of the fourth switch device, and the EPB control chip is connected to the control pin of the fourth switch device to control the on / off state between the input pin and the output pin of the fourth switch device. The second power supply terminal is connected to the input pin of the fifth switching device, the output pin of the fifth switching device is connected to the second motor drive module, and the line control brake chip is connected to the control pin of the fifth switching device to control the on / off state between the input pin and the output pin of the fifth switching device.

4. The single-sided EPB redundant braking control system according to claim 1, characterized in that, The EPB control chip is electrically connected to the brake-by-wire chip via a proprietary CAN module.

5. The single-sided EPB redundant braking control system according to claim 1, characterized in that, The first motor drive module includes a first pre-drive module and a first bridge module electrically connected to the first pre-drive module; the second motor drive module includes a second pre-drive module and a second bridge module electrically connected to the second pre-drive module. Both the first bridge module and the second bridge module are H-type bridge modules.

6. The single-sided EPB redundant braking control system according to claim 1, characterized in that, The EPB control unit further includes a first storage module electrically connected to the EPB control chip, and the brake-by-wire unit further includes a second storage module electrically connected to the brake-by-wire chip.

7. The single-sided EPB redundant braking control system according to claim 1, characterized in that, The EPB control chip is either TC234 or TC277, and the EPB control unit and the brake-by-wire unit are integrated.

8. A braking control method implemented using the single-sided EPB redundancy braking control system as described in any one of claims 1-7, characterized in that, include: If a fault is detected in the EPB control chip and / or the second CAN communication module at the EPB control unit; The control line controls the actuator to enter the working state for single-sided EPB redundant control.

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