Vehicle emergency unlocking system and unlocking method

Abstract

The invention provides a vehicle emergency unlocking system and an unlocking method.The vehicle emergency unlocking system comprises an air bag restraint system controller, a door lock control module, a door lock and an explosion unlocking module, the air bag restraint system controller is connected with the door lock control module, and the output end of the door lock control module is connected with the door lock; the safety air bag controller is connected with the explosion unlocking module, and the explosion unlocking module is arranged in the door lock. The safety air bag controller outputs a control instruction to the door lock control module after the safety air bag is triggered, and the door lock control module controls a door lock to be unlocked; when the safety air bag controller detects that the door lock control module breaks down, current pulses are output to the explosion unlocking module, and the explosion unlocking module ignites an unlocking mechanism in the door lock. Through redundancy design, when the door lock control module breaks down or is powered off, emergency unlocking is conducted in an explosion unlocking mode, personal safety is protected, and the safety of a vehicle is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle emergency unlocking, and in particular, the present invention relates to a vehicle emergency unlocking system and unlocking method. Background Art

[0002] In traditional vehicle safety systems, the airbag control unit (ACU) and door lock control system are typically independent modules. When a vehicle crashes, the ACU detects a collision signal and reaches the door unlock threshold. The ACU then sends an unlock signal to the unlock unit via CAN. Upon receiving the unlock signal, the door unlock control module responds by unlocking the door. Both power and control for door unlocking are provided by the door lock control unit. If a vehicle crashes, the door lock control unit can easily fail or experience a power outage, causing unlocking failure. This can severely hinder self-rescue efforts by those inside the vehicle or attempts to rescue the vehicle from outside.

[0003] Chinese Patent No. 220873044U provides a vehicle emergency unlocking device, system, and vehicle. The vehicle emergency unlocking device includes: a first verification module for generating a first unlocking signal based on unlocking information from a mobile terminal, the first verification module including a first power connector; a door module including a second power connector, both of which are located outside the vehicle and connected to an external power source; and a door controller and door lock connected thereto. The door controller is also connected to the first verification module and is configured to control the unlocking of the door lock based on the first unlocking signal.

[0004] The existing technology does not solve the problem that the vehicle emergency unlocking cannot be triggered when the door lock control system fails or the power is cut off, which affects the safety of the vehicle. Summary of the Invention

[0005] The present invention aims to provide a vehicle emergency unlocking system and unlocking method to solve the problem that the vehicle emergency unlocking cannot be triggered when the door lock control system fails or the power is cut off, thereby improving the safety of the vehicle.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention provides a vehicle emergency unlocking system, comprising an airbag controller, a door lock control module, a door lock and an explosion unlocking module, wherein the airbag controller is connected to the door lock control module, the output end of the door lock control module is connected to the door lock, the airbag controller is connected to the explosion unlocking module, and the explosion unlocking module is arranged in the door lock.

[0008] The airbag controller outputs control instructions to the door lock control module, the door lock control module inputs status information to the airbag controller, the door lock control module outputs control instructions to the door lock, the explosion unlocking module inputs status information to the airbag controller, and the airbag controller outputs current pulses to the explosion unlocking module.

[0009] The door lock control module adopts an electronic control unit.

[0010] The automotive electronic control unit is connected to the motor in the door lock via a driver chip.

[0011] The explosive unlocking module includes an igniter and an explosive, and the igniter is connected to the airbag controller via a hard line.

[0012] The explosive is arranged around the unlocking mechanism in the door lock.

[0013] The present invention provides an unlocking method for a vehicle emergency unlocking system. After the airbag is triggered, the airbag controller outputs a control instruction to a door lock control module, and the door lock control module controls the door lock to unlock. When the airbag controller detects that the door lock control module has a fault, it outputs a current pulse to an explosive unlocking module, and the explosive unlocking module detonates the unlocking mechanism in the door lock.

[0014] The airbag controller monitors the status of the explosion unlocking module in real time, and records a fault code when a fault occurs in the explosion unlocking module, and sends the fault code to the vehicle controller.

[0015] The airbag outputs a current pulse to the igniter, which detonates the explosive.

[0016] The technical effects of the present invention are:

[0017] (1) The present invention adds a control logic of hard-wired explosive unlocking of the airbag controller to the emergency unlocking of the door lock, ensuring timely unlocking when conventional unlocking fails in the event of a collision. A redundant design is added to the existing unlocking scheme. Even if the door lock control module fails, the door lock can be successfully unlocked by controlling the explosive unlocking module through the airbag controller after a collision.

[0018] (2) The airbag controller of the present invention is located in a central position and is not easily damaged. Therefore, the normal operation of the airbag controller can be guaranteed in the event of a collision.

[0019] (3) The present invention improves emergency reliability through a dual door lock unlocking mechanism after a vehicle collision. The system adopts a dual solution of electronic control unlocking and explosive mechanical unlocking. Under normal circumstances, the airbag controller controls the door lock control module through the CAN bus to drive the door lock motor to unlock. When the door lock control module fails, the explosive unlocking module is triggered, and the sodium azide explosive is used to destroy the door lock structure, ensuring that mechanical unlocking can still be achieved when the electronic system fails, avoiding people being trapped. The dual mechanism breaks through the limitations of a single electronic solution in terms of unlocking success rate and significantly improves emergency safety.

[0020] (4) The energy supply for the two emergency unlocking systems of the present invention is independent. The door lock control module relies on the vehicle's low-voltage battery for unlocking, while the explosive unlocking module discharges through the large capacitor built into the airbag controller. Even if the battery is damaged in a collision, the explosive unlocking can still be triggered. This eliminates the need for complete reliance on the vehicle's power supply, ensuring the availability of the unlocking function under extreme operating conditions.

[0021] (5) The airbag controller of the present invention monitors the voltage and current parameters of the ignition circuit to determine the status of the explosion release module in real time. If a short circuit or open circuit fault is detected, the fault code is stored and sent to the vehicle controller. This allows potential faults to be discovered in advance and avoided, improving system maintainability and safety.

[0022] (6) During explosive unlocking, the high-pressure gas pushes the piston or striker to destroy the door lock linkage rather than completely destroying the door structure. This ensures unlocking while minimizing additional damage to the vehicle body, preserving conditions for subsequent rescue efforts. This achieves a balance between emergency unlocking and vehicle structural protection, reducing rescue difficulty and repair costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] This manual includes the following drawings, which show the following contents:

[0024] Figure 1 This is a logical structure block diagram of an unlocking method of a vehicle emergency unlocking system of the present invention;

[0025] Figure 1 The markings are: 1. Airbag controller; 2. Door lock control module; 3. Door lock; 4. Explosion release module. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the specific implementation methods of the present invention through the description of the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate their implementation.

[0027] The present invention provides a vehicle emergency unlocking system, including an airbag controller 1, a door lock control module 2, a door lock 3 and an explosion unlocking module 4. The airbag controller 1 is connected to the door lock control module 2, the output end of the door lock control module 2 is connected to the door lock 3, the airbag controller 1 is connected to the explosion unlocking module, and the explosion unlocking module is arranged in the door lock 3.

[0028] The airbag controller 1 outputs control instructions to the door lock control module 2, the door lock control module 2 inputs status information to the airbag controller 1, the door lock control module 2 outputs control instructions to the door lock 3, the explosion unlocking module inputs status information to the airbag controller 1, and the airbag controller 1 outputs current pulses to the explosion unlocking module.

[0029] The door lock control module 2 uses an electronic control unit. This unit is connected to the motor in the door lock 3 via a driver chip. The explosive unlocking module includes an igniter and explosives. The igniter is hardwired to the airbag controller 1. The explosives are placed around the unlocking mechanism in the door lock 3.

[0030] The present invention provides an unlocking method for a vehicle emergency unlocking system. After the airbag is triggered, the airbag controller 1 outputs a control instruction to the door lock control module 2, and the door lock control module 2 controls the door lock 3 to unlock. When the airbag controller 1 detects that the door lock control module 2 has a fault, it outputs a current pulse to the explosive unlocking module, and the explosive unlocking module detonates the unlocking mechanism in the door lock 3.

[0031] The airbag controller 1 monitors the status of the explosive release module in real time and records a fault code if the module fails, sending the fault code to the vehicle controller. The airbag outputs a current pulse to the igniter, which detonates the explosive.

[0032] A vehicle emergency unlocking system according to the present invention is described in detail below.

[0033] The present invention provides a vehicle emergency unlocking system comprising an airbag controller 1, a door lock control module 2, a door lock 3, and an explosive unlocking module, wherein the airbag controller 1 (ACU) is used to control the unlocking of the vehicle's door lock 3 after the vehicle's airbag is triggered. The present invention provides two methods for emergency unlocking of the door lock 3. Generally speaking, the airbag controller 1 controls the unlocking of the door lock 3 through the door lock control module 2. However, after a vehicle collision, the door lock control module 2 may malfunction, resulting in the door lock 3 being unable to be opened. When the airbag controller 1 detects that the door lock control module 2 has malfunctioned, it outputs a pulse current to the igniter, which detonates the explosive, thereby destroying the unlocking mechanism in the door lock 3 and opening the vehicle door, thereby ensuring the safety of the personnel. In the embodiment of the present invention, the airbag controller 1 uses TC233+CG904 as the main control chip of the airbag controller.

[0034] The door lock control module 2 employs an electronic control unit (ECU) for controlling the unlocking and locking of the door locks 3. In the present invention, the door lock control module 2 is used to unlock the vehicle's door locks 3 in the event of a traffic accident, preventing people from being trapped inside the vehicle and endangering their safety. The specific model of the ECU in this embodiment of the present invention is the Bosch ME7.8.8.

[0035] The explosive unlocking module includes an igniter and an explosive. Upon receiving a current pulse from the airbag controller 1, the igniter detonates the explosive, which then destroys the unlocking mechanism in the door lock 3. The explosive in this invention uses sodium azide (NaN3), which is sealed in a high-temperature, impact-resistant metal or ceramic container to ensure stability during normal use and rapid response in the event of a collision.

[0036] The connection relationship of a vehicle emergency unlocking system of the present invention is described in detail below.

[0037] The airbag controller 1 is connected to the electronic control unit via the CAN bus. The electronic control unit is connected to the motor in the door lock 3 via a driver chip. The airbag controller 1 is connected to the igniter via a hard wire and a detection wire. The bridge wire in the igniter is connected to the explosive. The explosive is placed around the unlocking mechanism in the door lock 3. The driver chip model in the present invention is DIA57100.

[0038] The following describes in detail an unlocking method of a vehicle emergency unlocking system according to the present invention.

[0039] After the airbag is triggered, the airbag controller 1 outputs a control command to the door lock control module 2, which then unlocks the door lock 3. Specifically, the airbag controller 1 sends this command to the door lock control module 2 via the CAN bus. The door lock control module 2 then uses the driver chip to drive the motor in the door lock 3 in forward rotation, moving the unlocking mechanism and retracting the lock tongue, allowing the driver to open the door directly.

[0040] When the airbag controller 1 detects a malfunction in the door lock control module 2, it outputs a current pulse to the explosive unlocking module, which detonates the unlocking mechanism in the door lock 3. A vehicle collision may cause the door lock unlocking module to malfunction, preventing the door lock 3 from opening and potentially impacting safe evacuation. The airbag controller 1 detects whether the door lock control module 2 has malfunctioned. If so, it indicates that the door lock 3 has not been unlocked successfully. At this point, the airbag controller 1 outputs a current pulse to the igniter to detonate the explosive, destroying the unlocking mechanism in the door lock 3. Specifically, the high-pressure gas generated by the explosion pushes mechanical components such as the piston or striker, directly destroying the latch or connecting rod mechanism of the door lock 3. In this embodiment of the present invention, the current pulse has a current value of 1.75A and a duration of 0.7ms. It should be noted that the current pulse of the explosive unlocking module is derived from the discharge of a large capacitor in the airbag controller 1, while the power source for the door lock control module 2 is the low-voltage battery in the vehicle.

[0041] In the present invention, the airbag controller 1 monitors the status of the explosive release module in real time. If the module malfunctions, it records a fault code and sends it to the vehicle controller. Specifically, the airbag controller 1 determines whether the explosive release module is functioning properly by monitoring the resistance and current parameters of the ignition circuit in real time. If it detects a short or open circuit, it stores the fault code and sends it to the vehicle controller. The vehicle controller then notifies the user of the fault through a display or speaker, prompting prompt repairs.

[0042] The beneficial effects of the present invention are described in detail below.

[0043] The present invention adds a control logic of hard-wired explosive unlocking of the airbag controller 1 to the emergency unlocking of the door lock 3, ensuring timely unlocking when conventional unlocking fails in the event of a collision. A redundant design is added to the existing unlocking scheme. Even if the door lock control module 2 fails, after a collision occurs, the door lock 3 can be successfully unlocked by controlling the explosive unlocking module through the airbag controller 1.

[0044] In the present invention, the airbag controller 1 is located in the center and is not easily damaged. Therefore, when a collision occurs, the airbag controller 1 can be guaranteed to work normally.

[0045] This invention improves emergency response reliability by utilizing a dual unlocking mechanism for the door locks 3 after a vehicle collision. The system utilizes a dual approach of electronically controlled unlocking and explosive mechanical unlocking. Under normal circumstances, the airbag controller 1 controls the door lock control module 2 via the CAN bus to unlock the door lock 3 motor. If the door lock control module 2 malfunctions, the explosive unlocking module is triggered, destroying the door lock 3 structure with sodium azide explosive. This ensures mechanical unlocking even in the event of electronic system failure, preventing occupants from being trapped. This dual mechanism significantly improves emergency safety by surpassing the limitations of a single electronic unlocking solution in terms of unlocking success rate.

[0046] The present invention utilizes independent energy sources for both emergency releases. The door lock control module 2 relies on the vehicle's low-voltage battery for unlocking, while the explosive release module discharges the airbag controller 1's built-in large capacitor. This allows for explosive release even if the battery is damaged in a collision. This eliminates complete reliance on the vehicle's power supply, ensuring the availability of the unlocking function under extreme operating conditions.

[0047] The airbag controller 1 in this invention monitors the voltage and current parameters of the ignition circuit to determine the status of the explosive release module in real time. If a short circuit or open circuit fault is detected, it stores the fault code and sends it to the vehicle controller. This allows potential faults to be discovered and avoided in advance, improving system maintainability and safety.

[0048] During explosive unlocking, the high-pressure gas pushes a piston or striker to break the three-link mechanism of the door lock, rather than completely destroying the door structure. This ensures unlocking while minimizing damage to the vehicle body, preserving conditions for subsequent rescue efforts. This achieves a balance between emergency unlocking and protecting the vehicle structure, reducing rescue difficulty and repair costs.

[0049] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any direct application of the above-described concepts and technical solutions to other situations without modification, fall within the scope of protection of the present invention.

Claims

1. A vehicle emergency unlocking system, characterized by: It includes an airbag controller, a door lock control module, a door lock and an explosion unlocking module. The airbag controller is connected to the door lock control module, the output end of the door lock control module is connected to the door lock, the airbag controller is connected to the explosion unlocking module, and the explosion unlocking module is set in the door lock.

2. The vehicle emergency unlocking system according to claim 1, characterized in that: The airbag controller outputs control instructions to the door lock control module, the door lock control module inputs status information to the airbag controller, the door lock control module outputs control instructions to the door lock, the explosion unlocking module inputs status information to the airbag controller, and the airbag controller outputs current pulses to the explosion unlocking module.

3. The vehicle emergency unlocking system according to claim 1, characterized in that: The door lock control module adopts an electronic control unit.

4. A vehicle emergency unlocking system according to claim 1 or 3, characterized in that: The automotive electronic control unit is connected to the motor in the door lock via a driver chip.

5. The vehicle emergency unlocking system according to claim 1, characterized in that: The explosive unlocking module includes an igniter and an explosive, and the igniter is connected to the airbag controller via a hard line.

6. A vehicle emergency unlocking system according to claim 1 or 5, characterized in that: The explosive is arranged around the unlocking mechanism in the door lock.

7. An unlocking method for a vehicle emergency unlocking system according to any one of claims 1 to 6, characterized in that: After the airbag is triggered, the airbag controller outputs a control instruction to the door lock control module, and the door lock control module controls the door lock to unlock; when the airbag controller detects a fault in the door lock control module, it outputs a current pulse to the explosion unlocking module, and the explosion unlocking module detonates the unlocking mechanism in the door lock.

8. The unlocking method of a vehicle emergency unlocking system according to claim 7, characterized in that: The airbag controller monitors the status of the explosion unlocking module in real time, and records a fault code when a fault occurs in the explosion unlocking module, and sends the fault code to the vehicle controller.

9. The unlocking method of a vehicle emergency unlocking system according to claim 7, characterized in that: The airbag outputs a current pulse to the igniter, which detonates the explosive.

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