What is the principle of central locking?
2 Answers
The principle of central locking is: a weak radio wave is emitted from the owner's vicinity, received by the car's antenna, and the signal code is identified by the electronic control unit (ECU). The system's actuator then performs the locking and unlocking actions. This system consists of two parts: a transmitter and a receiver. The functions of central locking include: 1. Central control—when the driver locks the door next to them, all other doors are simultaneously locked. The driver can open all doors at once using the door lock switch or open a single door individually. 2. Speed control—when the vehicle reaches a certain speed, all doors automatically lock to prevent passengers from accidentally opening the doors by operating the door handles. 3. Individual control—in addition to the driver's door, separate spring lock switches are installed on the remaining doors, allowing independent control of each door's locking and unlocking.
I find the principle of central locking system quite straightforward. It starts with a button or remote control from the driver sending a signal to the central controller in the car, which acts like a brain commanding all the small motors on the doors. Each door lock is equipped with a small electric actuator. When the controller receives the lock signal, the actuator moves to engage the locking mechanism, thus locking the door; when unlocking, the actuator retracts to release the lock. The advantage of this system is that it can handle all doors with a single press, saving the hassle of dealing with each one individually, and it also prevents children from accidentally opening windows when the car doors are opened. It's very convenient to use in daily life—just press the key button, and you don't even need to insert the key. However, it's important to pay attention to the remote control battery; if it runs out of power, the system might fail. Batteries drain faster in summer when the car is exposed to intense heat. I once encountered this issue where the door locks didn't respond for a long time.
