What is the true function of the car central door lock system? And how does it achieve the function of one key locking the door? We will provide an in-depth analysis of the control mechanism and related functions of car central door locks.

The central door lock, as the name suggests, means that when you lock one door, the other doors will also lock, without the need for you to lock them one by one.

The core principle of the central control door lock is to convert electrical energy into mechanical energy and control the opening and closing of the car doors by driving gears with an electric motor. It mainly consists of three parts: door lock switch, door lock actuator, and door lock controller.

Firstly, the door lock actuator is responsible for executing locking and unlocking tasks, and is controlled by instructions from the door lock controller. At present, there are three different types of actuators on the market: electromagnetic, DC motor, and permanent magnet motor.

Secondly, the door lock switch usually consists of two parts: the main switch and the sub switch. The main switch is usually installed on the driver's side door and can control the locking and unlocking of all car doors; And the sub switch is installed on other car doors to control their respective doors separately.

Finally, the door lock controller is a key device that provides locking and unlocking pulse currents for the door lock actuator. It not only controls the current direction of the actuator, but also has a timing function to shorten the operation time. Door lock controllers can be roughly divided into three types: transistor type, capacitor type, and vehicle speed sensing type.