An electronic parking brake system with anti-theft function

Abstract

This invention relates to the field of electronic parking systems and discloses an electronic parking actuator system with anti-theft function, including an EPB housing (1), an EPB system inner cover (2), a parking controller EECU (3), a parking controller upper cover (4), and a gear reduction mechanism. The parking controller EECU (3) is sealed and integrated into the electronic parking actuator terminal, forming a sealed waterproof cavity through laser welding of the EPB system inner cover (2) and the parking controller upper cover (4); the transmission of vehicle power and identification signals is realized through four metal frequency pin connectors. The identification controller SECU establishes identification communication with the parking controller EECU (3) and controls the release authority of the electronic parking actuator through an identification code verification mechanism. This invention places the controller at the electronic parking actuator terminal to prevent the release of the electronic parking device by external power supply, thereby realizing the vehicle anti-theft function.

Description

Technical Field

[0001] This invention relates to the field of electronic parking systems, and more particularly to an electronic parking actuator system with anti-theft function. Background Technology

[0002] As an effective means of preventing unauthorized use of vehicles, car anti-theft devices typically employ methods such as steering mechanism locking, transmission system locking, and gear shift mechanism locking to achieve their anti-theft function. With the development of automotive technology, the Electronic Park Brake (EPB) system has become widely used in various vehicles. The EPB system is an electronic control system that, by connecting with the vehicle's anti-theft system, can effectively achieve vehicle anti-theft functionality while controlling costs.

[0003] However, existing EPB systems have the following technical shortcomings in terms of anti-theft security: First, the parking controller in existing EPB systems is typically integrated into the vehicle body control module or other control units far from the actuator, and is electrically connected to the electronic parking actuator via a long wiring harness. This distributed architecture means that the electronic parking actuator itself does not have independent authentication and safety decision-making capabilities; the safety boundary exists only at the body control module level, rather than at the actuator terminal level.

[0004] Secondly, because the motor drive end of the electronic parking brake actuator is directly exposed to the vehicle's power system via a wiring harness, unauthorized personnel can bypass the vehicle's original electronic control system and forcibly drive the electronic parking brake actuator to release when they cut the original control harness and apply power directly to the EPB motor. This physical attack method renders traditional electronic anti-theft measures completely ineffective.

[0005] Third, the release operation of existing EPB systems typically relies on the vehicle's overall anti-theft authentication process, but the EPB system itself does not establish an independent, dedicated secondary identification communication link for parking release control. Once the vehicle's overall anti-theft system is cracked or bypassed, the parking brake protection of the EPB system also fails.

[0006] To address the aforementioned technical issues, current technologies have not proposed a solution that integrates the parking controller into the electronic parking actuator terminal in a sealed manner and establishes identification communication with the identification controller via a dedicated metal pin interface. Therefore, there is an urgent need for an electronic parking actuator assembly and its control system with terminal-level anti-theft capabilities to fundamentally solve the technical defects of the EPB system, such as its susceptibility to physical bypass and illegal release. Summary of the Invention

[0007] This invention addresses the shortcomings of existing technologies by providing an electronic parking brake system with anti-theft functionality.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An electronic parking actuator system with anti-theft function includes an electronic parking actuator assembly, an identification controller SECU, an identification device for unlocking the vehicle, and a vehicle power supply. The identification controller SECU is activated when the vehicle is unlocked or the power is turned on. The electronic parking actuator assembly includes: an EPB housing, an EPB system inner cover, a parking controller upper cover, a parking controller EECU, and a gear reduction mechanism. The EPB housing has an internal accommodating chamber. The EPB system inner cover is mounted on top of the EPB housing. The parking controller upper cover is mounted on top of the EPB system inner cover. The parking controller upper cover has a metal pin connector, which includes at least a power interface and a signal transmission interface. The parking controller upper cover is connected to the vehicle body via a wiring harness. The parking controller EECU is sealed and integrated within the sealed space formed by the EPB housing, the EPB system inner cover, and the parking controller upper cover. The parking controller EECU is the terminal of the electronic parking actuator. The front of the parking controller EECU is connected to the metal pin connector of the EPB system inner cover, thereby connecting to the vehicle body power supply and communicating with the identification controller SECU. The back of the parking controller EECU is directly connected to the EPB motor, used to directly drive the EPB motor to perform parking / release actions. The gear reduction mechanism is installed inside the EPB housing and is directly connected to the EPB motor. It is used to reduce the output speed of the EPB motor and increase the output torque to drive the parking mechanism to perform parking lock or release actions.

[0009] The SECU (System-on-ECU) for vehicle identification is located in the vehicle's body control area. The SECU establishes identification communication with the EECU (Electronic Control Unit) for the parking brake via a metal pin. When the vehicle is parked, the parking mechanism is locked. When the vehicle is unlocked, the SECU identifies the user. If the user identification is successful, the SECU sends an identification code to the EECU. The EECU verifies the identification code; if successful, the EPB (Electronic Parking Brake) system responds to the user's operation, and the vehicle performs a normal parking release. If the EECU does not receive the identification code or the identification code is incorrect, it determines that the current operator is unauthorized, the vehicle is stolen, and the EPB system refuses to respond to the brake release signal. The identification code is either encrypted communication information or a UDS (Unique Device Switch) key. The parking controller (EECU) is seamlessly integrated into the electronic parking actuator terminal. A laser-welded top cover and the parking controller top cover form a sealed, waterproof cavity, enabling the electronic parking actuator to independently receive, identify, and control the motor drive. This fundamentally changes the existing architecture where the controller and actuator are separate, bringing the safety boundary down to the actuator terminal. Power and signal transmission are integrated through four metal pin connectors, simplifying the connection structure. Unauthorized personnel cannot directly drive the EPB motor via an external power supply because all drive current must pass through the parking controller (EECU), which only activates the drive circuit when the identification code verification is successful.

[0010] The system utilizes a multi-module collaborative defense mechanism, which includes: structural module defense, which uses a laser-welded sealing structure between the EPB housing, the EPB system inner cover, and the parking controller top cover to seal the parking controller EECU to the electronic parking actuator terminal, preventing unauthorized physical contact and disassembly; terminal module defense, which integrates the parking controller EECU into the electronic parking actuator terminal as the sole control node, preventing external power from directly driving the EPB motor and ensuring that all release operations must be verified by an identification code; communication module defense, which uses an identification communication mechanism between the identification controller SECU and the parking controller EECU and an encryption mechanism for the identification code to prevent unauthorized personnel from forging or bypassing authentication; and a sealing protection module, which includes a laser-welded sealing structure between the EPB housing, the EPB system inner cover, and the parking controller top cover, used to seal the parking controller EECU to the electronic parking actuator terminal, preventing direct external contact and unauthorized physical access.

[0011] Preferably, the parking controller (EECU) is integrated into the electronic parking actuator terminal to prevent external power supply from directly driving the EPB motor to perform the release action; the parking controller (EECU) is the only control node for the release action of the electronic parking actuator, and unauthorized personnel cannot forcibly release the electronic parking device by bypassing the parking controller (EECU).

[0012] Preferably, when the parking controller EECU receives the correct identification code, the power supply and electronic parking actuator circuit are connected, and the vehicle responds normally to the parking release command; when the parking controller EECU does not have an identification code, the electronic parking actuator is prohibited from responding to the parking release operation.

[0013] Preferably, the gear reduction mechanism includes a multi-stage gear transmission assembly, which comprises an input gear, an intermediate gear, and an output gear. The input gear is connected to the output shaft of the EPB motor, and the output gear is connected to the drive shaft of the parking mechanism. This multi-stage gear transmission structure ensures a clear torque transmission path, meeting the high torque output requirements of the electronic parking actuator.

[0014] Preferably, the parking controller EECU includes a microprocessor unit, a motor drive circuit, and a communication decoding module. The output of the motor drive circuit is electrically connected to the EPB motor, and the input of the communication decoding module is electrically connected to the signal transmission interface. The communication decoding module decrypts and verifies the validity of the received identification code. The parking controller EECU also includes a power management module, whose input is electrically connected to the power interface. The power management module includes a main power input and a power switching circuit. When the power interface is disconnected or the voltage / current parameters of the external power supply exceed a preset threshold, the power switching circuit maintains the anti-theft lock state of the parking controller EECU. The power management module maintains the anti-theft lock state when the power interface is disconnected or the external power parameters are abnormal, ensuring that the parking controller EECU can still perform its anti-theft function when subjected to a power attack.

[0015] Preferably, the microprocessor unit of the parking controller (EECU) stores a whitelist of authorized identification codes, which includes multiple authorized identification codes. The communication decoding module compares the received identification code with the whitelist, and the verification result is passed only if the identification code exists in the whitelist. The microprocessor unit's internal storage of the authorized identification code whitelist supports multi-user authorization management, and permissions can be updated without replacing hardware when the authorized user changes.

[0016] Preferably, the EPB housing, the EPB system inner cover, and the parking controller top cover are each laser-welded to form sealed waterproof cavities. The parking controller EECU is sealed within the waterproof cavity between the EPB system inner cover and the parking controller top cover. The gear reduction mechanism is installed within the housing of the EPB housing to prevent unauthorized personnel from accessing the circuitry of the parking controller EECU through disassembly. The output end of the gear reduction mechanism is equipped with a self-locking mechanism to prevent the parking mechanism from being reverse-driven by external force when the EPB motor is not powered. The parking controller top cover is connected to the vehicle body via a wiring harness, which transmits vehicle power and identification signals. The parking controller EECU connects to the parking controller top cover via a metal pin connector and receives vehicle power and identification signals.

[0017] Preferably, the electronic parking actuator system includes: an identity recognition module, a communication transmission module, a terminal verification module, an execution control module, and a status determination module. The identity recognition module includes an identity recognition device and an identity recognition controller (SECU), used to collect user identity information and perform initial identity verification, generating an identity recognition code. The communication transmission module includes four metal pin connectors and a vehicle wiring harness, used to transmit the identity recognition code and vehicle power supply from the identity recognition controller (SECU) to the parking controller (EECU). The terminal verification module includes the parking controller (EECU), used to independently recognize and determine the authorization of the received identity recognition code at the electronic parking actuator terminal. The execution control module includes an EPB motor and a gear reduction mechanism, used to execute or prohibit the parking release action based on the determination result of the terminal verification module. The status determination module is used to determine whether the vehicle is in a normal state or a stolen state based on the determination result of the terminal verification module. The terminal verification module executes the following control flow: Step S1: The communication decoding module of the parking controller EECU listens for the identification code from the identification controller SECU through the signal transmission interface; Step S2: If no identification code is received, the parking controller EECU determines that the current operator is an unauthorized person and the vehicle is stolen, and prohibits the electronic parking actuator from responding to the parking release operation. Step S3: If an identification code is received, the communication decoding module identifies the identification code. Step S4: If the identification code is correctly identified, the parking controller EECU connects the power supply and the electronic parking actuator circuit, the EPB system responds to the user operation, and the vehicle performs the normal parking release function. Step S5: If the identification code is incorrectly identified, the current operator is determined to be an unauthorized person and the vehicle is stolen. The EPB system refuses to respond to the brake release signal.

[0018] By designing a multi-layered collaborative defense mechanism, the specific implementation methods and interrelationships of structural module defense, terminal module defense, and communication module defense are clarified, so that the security mechanisms at each module level form a defense-in-depth system. Even if a module level is breached, other levels can still continue to play a protective role.

[0019] This invention, by adopting the above technical solutions, has significant technical effects: This invention integrates the parking controller (EECU) into the electronic parking actuator terminal in a sealed manner. A laser-welded structure forms a sealed protective layer, and a metal pin connector enables integrated power and signal transmission. An identification communication link is established between the identification controller (SECU) and the parking controller (EECU). An identification code verification mechanism controls the release authority of the electronic parking actuator. A multi-layered control architecture is constructed, and a multi-module collaborative defense mechanism is designed. System control methods enable coordination between modules, building a terminal-level anti-theft system for the electronic parking actuator from three dimensions: structural modules, terminal modules, and communication modules. Unauthorized personnel cannot directly drive the EPB motor via external power, cannot physically disassemble and access the internal circuitry, and cannot illegally release the parking brake by forging or bypassing authentication. This fundamentally solves the technical defect of the EPB system being easily bypassed through disassembly and external force, significantly improving the vehicle's anti-theft security performance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is the right view of the present invention; Figure 4 yes Figure 3 Exploded view; Figure 5 This is a schematic diagram of the control flow of the present invention.

[0021] The parts referred to by the numbers in the above attached diagrams are as follows: 1. EPB housing; 2. EPB system inner cover; 3. Parking controller EECU; 4. Parking controller top cover; 5. Power interface; 6. Signal transmission interface. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] Example 1 An electronic parking brake system with anti-theft function, such as Figure 1-4As shown, it includes an electronic parking actuator assembly and also includes an identification controller SECU, an identification device for unlocking the vehicle, and a vehicle power supply. The identification controller SECU is activated when the vehicle is unlocked or the power is turned on. The electronic parking actuator assembly includes: an EPB housing 1, an EPB system inner cover 2, a parking controller upper cover 4, a parking controller EECU 3, and a gear reduction mechanism. The EPB housing 1 has an internal accommodating chamber. The EPB system inner cover 2 is mounted on the top of the EPB housing 1. The parking controller upper cover 4 is mounted on the top of the EPB system inner cover 2. The parking controller upper cover 4 has a metal pin connector, which includes at least a power interface 5 and a signal transmission interface 6. The parking controller upper cover 4 is connected to the vehicle body via a wiring harness. The parking controller EECU 3 is sealed and integrated within the sealed space formed by the EPB housing 1, the EPB system inner cover 2, and the parking controller upper cover 4. The parking controller EECU 3 is the terminal of the electronic parking actuator. The front of the parking controller EECU 3 is connected to the metal pin connector of the EPB system inner cover 2, thereby connecting to the vehicle body power supply and communicating with the identification controller SECU. The back of the parking controller EECU 3 is directly connected to the EPB motor, used to directly drive the EPB motor to perform parking / release actions. The gear reduction mechanism is installed inside the EPB housing 1 and is directly connected to the EPB motor. It reduces the output speed of the EPB motor and increases its output torque to drive the parking mechanism to perform parking lock or release actions. In this embodiment, the parking controller EECU is a controller with the same structure and principle as the EECU. It issues corresponding commands by detecting various sensor information. Its structure is a common configuration for those skilled in the art, and therefore will not be described in detail here.

[0024] like Figure 5 As shown, the identity recognition controller SECU is located in the vehicle body control area. The identity recognition controller SECU establishes recognition communication with the parking controller EECU3 through a metal frequency pin. Typically, the identity recognition device includes common unlocking devices such as vehicle keys and mobile phones, making the system compatible with existing vehicle keyless entry systems.

[0025] When the vehicle is in a stopped state, the parking mechanism is locked. When the vehicle is unlocked, the SECU (System Identification Control Unit) identifies the user. If the user identification is successful, the SECU sends an identification code to the EECU3 (Electronic Control Unit). The EECU3 verifies the identification code. If the verification is successful, the EPB (Electronic Parking Brake) system responds to the user's operation, and the vehicle performs a normal parking release function. If the EECU3 does not receive the identification code or the identification code is incorrect, it determines that the current operator is unauthorized, the vehicle is stolen, and the EPB system refuses to respond to the brake release signal. The identification code is encrypted communication information or a UDS key.

[0026] The system utilizes a multi-module collaborative defense mechanism, which includes: structural module defense, which uses a laser-welded sealing structure between the EPB housing 1, the EPB system inner cover 2, and the parking controller upper cover 4 to seal the parking controller EECU3 to the electronic parking actuator terminal, preventing unauthorized physical contact and disassembly; terminal module defense, which integrates the parking controller EECU3 into the electronic parking actuator terminal as the sole control node, preventing external power from directly driving the EPB motor and ensuring that all release operations must be verified by the identification code; communication module defense, which uses an identification communication mechanism between the identification controller SECU and the parking controller EECU3 and an encryption mechanism for the identification code to prevent unauthorized personnel from forging or bypassing authentication; and a sealing protection module, which includes a laser-welded sealing structure between the EPB housing 1, the EPB system inner cover 2, and the parking controller upper cover 4, used to seal the parking controller EECU3 to the electronic parking actuator terminal, preventing unauthorized physical contact.

[0027] The parking controller EECU3 is integrated into the electronic parking actuator terminal to prevent external power supply from directly driving the EPB motor to perform the release action. The parking controller EECU3 is the only control node for the release action of the electronic parking actuator, and unauthorized personnel cannot forcibly release the electronic parking device by bypassing the parking controller EECU3.

[0028] When the parking controller EECU3 receives the correct identification code, the power supply and electronic parking actuator circuit are connected, and the vehicle responds normally to the parking release command; when the parking controller EECU3 does not have an identification code, the electronic parking actuator is prohibited from responding to the parking release operation.

[0029] The gear reduction mechanism includes a multi-stage gear transmission assembly, which comprises an input gear, an intermediate gear, and an output gear. The input gear is connected to the output shaft of the EPB motor, and the output gear is connected to the drive shaft of the parking mechanism. The multi-stage gear structure is a standard feature in this field; therefore, the specific meshing and linkage mechanisms are not detailed here.

[0030] The parking controller EECU3 includes a microprocessor unit, a motor drive circuit, and a communication decoding module. The output of the motor drive circuit is electrically connected to the EPB motor, and the input of the communication decoding module is electrically connected to the signal transmission interface 6. The communication decoding module decrypts and verifies the validity of the received identification code. The parking controller EECU3 also includes a power management module, the input of which is electrically connected to the power interface 5. The power management module includes a main power input and a power switching circuit. When the power interface 5 is disconnected or the voltage / current parameters of the external power supply exceed a preset threshold, the power switching circuit maintains the anti-theft lock state of the parking controller EECU3.

[0031] like Figure 5 As shown, the microprocessor unit of the parking controller EECU3 stores a whitelist of authorized identification codes, which includes multiple authorized identification codes. The communication decoding module compares the received identification code with the whitelist, and the verification result is passed only if the identification code exists in the whitelist.

[0032] like Figure 2 As shown, sealed waterproof cavities are formed between the EPB housing 1 and the EPB system inner cover 2, and between the EPB system inner cover 2 and the parking controller upper cover 4, respectively, through laser welding. The parking controller EECU3 is sealed within the waterproof cavity between the EPB system inner cover 2 and the parking controller upper cover 4. The gear reduction mechanism is installed in the accommodating cavity of the EPB housing 1 to prevent unauthorized personnel from accessing the circuit part of the parking controller EECU3 by disassembly. The output end of the gear reduction mechanism is equipped with a self-locking mechanism, which is used to prevent the parking mechanism from being driven in reverse by external force when the EPB motor is not powered. The parking controller upper cover 4 is connected to the vehicle body through a wiring harness, which transmits vehicle power and identification signals. The parking controller EECU3 is connected to the parking controller upper cover 4 through a metal pin connector and receives vehicle power and identification signals.

[0033] The electronic parking actuator system includes: an identity recognition module, a communication transmission module, a terminal verification module, an execution control module, and a status determination module. The identity recognition module includes an identity recognition device and an identity recognition controller (SECU), used to collect user identity information and perform initial identity verification, generating an identity recognition code. The communication transmission module includes four metal pin connectors and a vehicle wiring harness, used to transmit the identity recognition code and vehicle power from the identity recognition controller (SECU) to the parking controller (EECU3). The terminal verification module includes the parking controller (EECU3), used to independently recognize and determine the authorization of the received identity recognition code at the electronic parking actuator terminal. The execution control module includes an EPB motor and a gear reduction mechanism, used to execute or prohibit the parking release action based on the determination result of the terminal verification module. The status determination module is used to determine whether the vehicle is in a normal state or a stolen state based on the determination result of the terminal verification module. The terminal verification module executes the following control flow: Step S1: The communication decoding module of the parking controller EECU3 listens for the identification code from the identification controller SECU through the signal transmission interface 6. Step S2: If no identification code is received, the parking controller EECU3 determines that the current operator is an unauthorized person and the vehicle is stolen, and prohibits the electronic parking actuator from responding to the parking release operation. Step S3: If an identification code is received, the communication decoding module identifies the identification code. Step S4: If the identification code is correctly identified, the parking controller EECU3 connects the power supply and the electronic parking actuator circuit, the EPB system responds to the user operation, and the vehicle performs the normal parking release function. Step S5: If the identification code is incorrectly identified, the current operator is determined to be an unauthorized person and the vehicle is stolen. The EPB system refuses to respond to the brake release signal.

[0034] Example 2 The electronic parking actuator system with anti-theft function of the present invention has the same structure as Embodiment 1. As one embodiment, it includes an electronic parking actuator assembly, an identity recognition controller SECU, an identity recognition device for unlocking the vehicle, and a vehicle power supply. The electronic parking actuator assembly includes an EPB housing 1, an EPB system inner cover 2, a parking controller upper cover 4, a parking controller EECU 3, and a gear reduction mechanism. The EPB housing 1 forms an internal accommodating chamber. The EPB system inner cover 2 is installed on the top of the EPB housing 1, and the parking controller upper cover 4 is installed on the top of the EPB system inner cover 2 and connected to the vehicle body via a wiring harness. The EPB system inner cover 2 is provided with four metal pin connectors, including a power interface 5 and a signal transmission interface 6. The parking controller EECU3 is sealed and integrated within the sealed space formed by the EPB housing 1, the EPB system inner cover 2, and the parking controller upper cover 4. The front is connected to the metal pins of the EPB system inner cover 2 to achieve power supply to the vehicle body and communication with the identification controller SECU. The back is directly connected to the EPB motor to drive the EPB motor to perform parking / release actions. The gear reduction mechanism is installed inside the EPB housing 1 and is directly connected to the EPB motor. It includes a multi-stage gear transmission group, which includes an input gear, an intermediate gear, and an output gear. The input gear is connected to the output shaft of the EPB motor, and the output gear is connected to the drive shaft of the parking mechanism. It is used to reduce the output speed of the EPB motor and increase the output torque to drive the parking mechanism to perform parking lock or release actions. The identification controller SECU is located in the vehicle body control area and establishes identification communication with the parking controller EECU3 through metal pins; the identification device includes vehicle keys, mobile phones and other devices used to unlock the vehicle. The EPB housing 1 and the EPB system inner cover 2, and the EPB system inner cover 2 and the parking controller upper cover 4 are respectively formed by laser welding to form sealed waterproof cavities. The parking controller EECU3 is sealed in the waterproof cavity between the EPB system inner cover 2 and the parking controller upper cover 4. The output end of the gear reduction mechanism is equipped with a self-locking mechanism to prevent the parking mechanism from being driven in reverse by external force when the EPB motor is not powered.

[0035] Example 3 The electronic parking brake system with anti-theft function has the same structure as Embodiment 1. As one implementation, the parking controller EECU3 includes a microprocessor unit, a motor drive circuit, a communication decoding module, and a power management module. The output of the motor drive circuit is electrically connected to the EPB motor, and the input of the communication decoding module is electrically connected to the signal transmission interface 6 for decrypting and verifying the legality of the received identification code. The input of the power management module is electrically connected to the power interface 5, including a main power input and a power switching circuit. When the power interface 5 is disconnected or the voltage / current parameters of the external power supply exceed a preset threshold, the power switching circuit maintains the anti-theft lock state of the parking controller EECU3. The microprocessor unit stores a whitelist of authorized identity codes, which includes multiple authorized identity codes. The communication decoding module compares the received identity code with the whitelist, and the verification result is passed only if the identity code exists in the whitelist.

[0036] Anti-theft control process: When the vehicle is in a stopped state, the parking mechanism is locked; the identification controller SECU is activated when the vehicle is unlocked or the power is turned on. When the vehicle is unlocked, the SECU identifies the user through the identification device. After the user is identified, the SECU sends an identification code to the EECU3 parking controller. The identification code is either an encrypted communication information or a UDS key. The parking controller EECU3 recognizes the identification code: When the identification is successful, the power supply and electronic parking actuator circuit are connected, the EPB system responds to the user operation, and the vehicle performs the normal parking release function. If no identification code is received or the identification code is incorrect, the current operator is determined to be an unauthorized person and the vehicle is stolen. The EPB system will refuse to respond to the brake release signal. The terminal verification module executes the following control flow: Step S1: The communication decoding module of the parking controller EECU3 listens for the identification code from the identification controller SECU through the signal transmission interface 6. Step S2: If no identification code is received, the parking controller EECU3 determines that the current operator is an unauthorized person and the vehicle is stolen, and prohibits the electronic parking actuator from responding to the parking release operation. Step S3: If an identification code is received, the communication decoding module identifies the identification code. Step S4: If the identification code is correctly identified, the parking controller EECU3 connects the power supply and the electronic parking actuator circuit, the EPB system responds to the user operation, and the vehicle performs the normal parking release function. Step S5: If the identification code is incorrectly identified, the current operator is determined to be an unauthorized person and the vehicle is stolen. The EPB system refuses to respond to the brake release signal.

[0037] Example 4 An electronic parking actuator system with anti-theft function has the same structure as Embodiment 1. As one implementation method, an anti-theft control method for an electronic parking actuator is applied to the above-mentioned anti-theft control system for an electronic parking actuator, including the following steps: Step M1: With the vehicle stopped, the parking mechanism is locked, and the parking controller EECU remains in the default anti-theft locked state. In step M2, when the vehicle is unlocked or powered on, the SECU (System-Controlled Electronic Control Unit) is activated and the user is identified through the identification device. Step M3: If the user identification is successful, the identification controller SECU generates an identification code and sends it to the parking controller EECU through the signal transmission interface of the four metal frequency pin connectors. Step M4: The parking controller EECU receives and identifies the identification code; In step M5, if the identification code is successfully recognized, the parking controller EECU connects the power supply and the electronic parking actuator circuit, the EPB system responds to the user's operation, and the vehicle performs the normal parking release function. In step M6, if the parking controller EECU does not receive the identification code or the identification code is incorrect, it is determined that the current operator is an unauthorized person and the vehicle is stolen. The EPB system refuses to respond to the brake release signal and maintains the anti-theft lock state.

[0038] Step M4 includes the following sub-steps: In step M41, the communication decoding module receives the identification code data through the signal transmission interface; Step M42: Determine whether the identification code is in the form of encrypted communication information or UDS key; Step M43: Query the locally stored whitelist of authorized identity codes to determine whether the received identity code exists in the whitelist; In step M44, if the ID code exists in the whitelist, it is determined that the ID code has been successfully recognized; otherwise, it is determined that the ID code has been incorrectly recognized.

[0039] In step M6, the EPB system's refusal to respond to the brake release signal includes: the parking controller EECU keeping the motor drive circuit off, preventing the EPB motor from being powered on; and simultaneously sending an anti-theft lock status signal to the vehicle instrument system via the vehicle bus.

[0040] Example 5 The electronic parking brake system with anti-theft function has the same structure as Embodiment 1. As one implementation method, the multi-module collaborative defense mechanism of the present invention can be verified for its effectiveness through the following attack scenarios: Scenario 1: External Power Supply Attack. An attacker attempts to cut the power harness of the electronic parking actuator and directly force power to the EPB motor. Because the parking controller EECU3 is sealed and integrated into the electronic parking actuator terminal and is the sole control node for the EPB motor drive circuit, the electrical connections of the EPB motor are sealed within a laser-welded cavity, preventing the attacker from directly accessing the motor terminals. Even if the attacker attempts to apply external power through power interface 5, the power management module detects abnormal power parameters and maintains the anti-theft lockout state. Both structural module defense and terminal module defense are effective simultaneously, and the attack fails.

[0041] Scenario 2: Signal Spoofing Attack. An attacker attempts to inject a forged identification code through signal transmission interface 6. Because the identification code uses encrypted communication information or a UDS key, the forged code cannot pass the encryption verification or UDS security algorithm check. The terminal verification module fails, and the EPB system refuses to respond. The communication module's defense is effective, and the attack fails.

[0042] Scenario 3: Physical Disassembly Attack. An attacker attempts to disassemble the electronic parking brake actuator, removing the internal parking controller EECU3 or directly accessing the circuit board. Because the EPB housing 1, the EPB system inner cover 2, and the parking controller upper cover 4 are sealed by laser welding, the welded structure is irreversible and cannot be disassembled without damage using conventional tools. Forcibly breaking the welded structure will damage the internal circuitry and mechanical components, rendering the electronic parking brake actuator inoperable, but it cannot be used to illegally release the parking brake. The structural module defense is effective, and the attack fails.

[0043] Scenario 4: Communication Interruption Attack. The attacker cuts the communication harness of signal transmission interface 6. If the communication decoding module does not receive an identification code within a preset time window, it automatically determines that communication has been interrupted and triggers the anti-theft lock state, keeping the motor drive circuit off. The terminal module's defense is effective, and the attack fails.

[0044] In summary, the above are merely preferred embodiments of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the present invention.

Claims

1. An electronic parking enforcement system with anti-theft function, characterized in that, It includes an electronic parking actuator assembly, as well as an identification controller SECU, an identification device for unlocking the vehicle, and a vehicle power supply. The identification controller SECU is activated when the vehicle is unlocked or the power is turned on. The electronic parking actuator assembly includes: EPB enclosure (1), the interior of EPB enclosure (1) has a accommodating chamber; EPB system inner cover (2), the EPB system inner cover (2) is installed on the top of the EPB enclosure (1); The parking controller cover (4) is installed on the top of the EPB system inner cover (2). The parking controller cover (4) is connected to the vehicle body through a wiring harness. The parking controller cover (4) is provided with a metal frequency pin connector, which includes a power interface (5) and a signal transmission interface (6). The parking controller EECU (3) is sealed and integrated in the sealed space formed by the EPB housing (1), the EPB system inner cover (2), and the parking controller upper cover (4). The parking controller EECU (3) is the electronic parking actuator terminal. The front of the parking controller EECU (3) is connected to the metal pin of the EPB system inner cover (2), thereby connecting to the vehicle body power supply and communicating with the identification controller SECU. The back of the parking controller EECU (3) is directly connected to the EPB motor to drive the EPB motor to perform parking / release actions. The gear reduction mechanism is installed inside the EPB housing (1). The gear reduction mechanism is directly connected to the EPB motor and is used to reduce the output speed of the EPB motor and increase the output torque to drive the parking mechanism to perform parking lock or release actions. The SECU (System-on-ECU) is located in the vehicle body control area. The SECU establishes identification communication with the EECU (Electronic Control Unit) (3) via a metal pin. When the vehicle is in a stopped state, the parking mechanism is locked. When the vehicle is unlocked, the SECU identifies the user. If the user identification is successful, the SECU sends an identification code to the EECU (3). The EECU (3) identifies the identification code. If the identification is successful, the EPB system responds to the user's operation, and the vehicle performs the normal parking release function. If the EECU (3) does not receive the identification code or the identification code is incorrect, it determines that the current operator is an unauthorized person, the vehicle is stolen, and the EPB system refuses to respond to the brake release signal. The identification code is encrypted communication information or a UDS key.

2. The electronic parking enforcement system with anti-theft function according to claim 1, characterized in that, The parking controller EECU (3) is integrated into the electronic parking actuator terminal to prevent the external power supply from directly driving the EPB motor to perform the release action; the parking controller EECU (3) is the only control node for the release action of the electronic parking actuator.

3. The electronic parking enforcement system with anti-theft function according to claim 1, wherein, When the parking controller EECU (3) receives the correct identification code, the power supply and electronic parking actuator circuit are connected, and the vehicle responds normally to the parking release command; when the parking controller EECU (3) does not have an identification code, the electronic parking actuator is prohibited from responding to the parking release operation.

4. The electronic parking enforcement system with anti-theft function according to claim 1, wherein, The gear reduction mechanism includes a multi-stage gear transmission group, which includes an input gear, an intermediate gear, and an output gear. The input gear is connected to the output shaft of the EPB motor, and the output gear is connected to the drive shaft of the parking mechanism.

5. The electronic parking enforcement system with anti-theft function according to claim 1, wherein, The parking controller EECU (3) includes a microprocessor unit, a motor drive circuit and a communication decoding module. The output of the motor drive circuit is electrically connected to the EPB motor, and the input of the communication decoding module is electrically connected to the signal transmission interface (6). The communication decoding module decrypts and verifies the legality of the received identification code. The parking controller EECU (3) also includes a power management module. The input terminal of the power management module is electrically connected to the power interface (5). The power management module includes a main power input terminal and a power switching circuit. When the power interface (5) is cut off or the voltage / current parameters of the external power supply exceed the preset threshold, the power switching circuit maintains the anti-theft lock state of the parking controller EECU (3).

6. The electronic parking enforcement system with anti-theft function according to claim 5, wherein, The microprocessor unit of the parking controller EECU (3) stores an authorized identity identification code whitelist, which includes multiple authorized identity identification codes. The communication decoding module compares the received identity identification code with the whitelist. The verification result is passed only if the identity identification code exists in the whitelist.

7. The electronic parking enforcement system with anti-theft function according to claim 1, wherein, The EPB housing (1), the EPB system inner cover (2), and the parking controller upper cover (4) are respectively formed by laser welding to form sealed waterproof cavities. The parking controller EECU (3) is sealed in the waterproof cavity between the EPB system inner cover (2) and the parking controller upper cover (4). The gear reduction mechanism is installed in the housing cavity of the EPB housing (1) to prevent unauthorized personnel from accessing the circuit part of the parking controller EECU (3) by disassembly. The output end of the gear reduction mechanism is equipped with a self-locking mechanism, which is used to prevent the parking mechanism from being driven in reverse by external force when the EPB motor is not powered. The parking controller upper cover (4) is connected to the vehicle body through a wiring harness, which transmits the vehicle body power and identification signals. The parking controller EECU (3) is connected to the parking controller upper cover (4) through a metal frequency pin connector and receives the vehicle body power and identification signals.

8. The electronic parking enforcement system with anti-theft function according to claim 1, wherein, The system includes: The identity recognition module includes an identity recognition device and an identity recognition controller (SECU), which is used to collect user identity information, perform initial identity verification, and generate an identity recognition code. The communication transmission module includes four metal pin connectors and a vehicle body wiring harness, which are used to transmit the identification code and vehicle body power from the identification controller SECU to the parking controller EECU (3). The terminal verification module includes a parking controller EECU (3), which is used to independently identify and determine the authorization of the received identity code at the electronic parking actuator terminal. The execution control module includes an EPB motor and a gear reduction mechanism, which is used to execute or prohibit the parking release action based on the judgment result of the terminal verification module. The status determination module is used to determine whether the vehicle is in a normal state or a stolen state based on the determination result of the terminal verification module. The terminal verification module executes the following control flow: Step S1, the communication decoding module of the parking controller EECU (3) listens for the identification code from the identification controller SECU through the signal transmission interface (6); Step S2, if no identification code is received, the parking controller EECU (3) determines that the current operator is an unauthorized person and the vehicle is stolen, and prohibits the electronic parking actuator from responding to the parking release operation; Step S3: If an identification code is received, the communication decoding module identifies the identification code. Step S4: If the identification code is correctly identified, the parking controller EECU (3) connects the power supply and the electronic parking actuator circuit, the EPB system responds to the user operation, and the vehicle performs the normal parking release function. Step S5: If the identification code is incorrectly identified, the current operator is determined to be an unauthorized person and the vehicle is stolen. The EPB system refuses to respond to the brake release signal.

Images