central locking
For motorists, the comfort system has a special meaning. Is it not true, it's convenient when on your car lock and unlock all the doors, the fuel tank cover, the trunk door with one touch the button on the key? Such a mechanism is related to the auxiliary systems and is called the central castle of the car.
You can control the functions of the central locking center centrally and decentralized. What does this mean?
- Centralized - one on all doors electronic control unit.
- Decentralized - besides a single control unit, there are still blocks: one for each door.
Consider the center of the central lock as a system of comfort and the principle of its work.
Control unit, input sensors and actuators that perform an actuator, all these are nodes of the mechanism of the Central Castle.
The entire system is controlled remotely from the control panel. The remote control is a radio transmitter, which is located in the knob of the ignition key. From it the signal is sent to the antenna of the central control device. The remote function of the central locking is shown at a distance of up to 10 meters.
Input sensors in the lock mechanism are microswitches and end door switches. To fix the current position in the design of the automotive door, microswitches are used. To transmit a signal to the control unit and there to fix its current position is used by the limit switch.
The front doors of the car are equipped with a cam mechanism and microswitters that fix the position of the lock. Moreover, the surface of these cams has a special profile. The block "Block" (LOCK) generates one of the two microswits, the other generates the "Unlock" signal (UNLOCK).
Form the signal of the central locking device about the current state two more microswitches. When triggered, they will be sent "unlocked" (unlocked) or "blocked" (Locked).
In the drive of the lock there is a lever mechanism. To fix its position and determine the current position of the door works another microswitch. In case the door opens, the switch contacts are closed. In this position, the mechanism of the central castle of the car cannot be activated.
From all switches, signals are sent to the electronic control unit. Which processes them and sends to the central block. The processed signal is then redirected to the control blocks to the front doors, on the actuators of the rear door locks, the lock of the fuel tank cover or the trunk doors. In other words, the door control units receive a signal that activates actuators blocking doors and other locks.
The actuator is the most actuator, the door lock. It is combined with a gearbox and is a DC electric motor. Reducer, rotating the electric motor, gives the mechanism a reciprocating movement - the lock cylinder works like this.
In addition to the electrical drive, there are pneumatic designs of executive devices. For example, the famous German plants and cars used pneumatics and. Nowadays, pneumatic drives are almost never found.
Video about the system of the central castle of the machine and their principle of operation:
The central locking system operates regardless of the state of ignition of the machine. Whether it is enabled, or disabled - does not matter, the mechanism will work.
Locking the key input key, you run the function of the microswitch responsible for blocking. This happens as follows: From the switch, the signal is fed to the block controlling the door, then it goes to the central control unit that controls all the door blocks, the electric motors of the rear doors, tank and trunk covers. All actuators and automatic doors are launched. So that the electrical drive does not work again, a signal from the microswitch is formed in the central locking device. Remove with the door lock in the same way - turning the key in the lock.
To block the doors of your car at a distance (remote) on the ignition key there is a button or a separate key chain with buttons. When it is pressed, the signal is sent to the receiving antenna to the central control unit. There, "sending" is processed and a team goes from the center to the peripheral blocks (on the door, the lock of the fuel tank and trunk cover). Executive mechanisms that activate a button on the ignition key provide blocking all doors in the machine. Like the fixation of the doors, the button remotely occurs and the alarm is turned on. Additional comfort will serve remote control of car glasses. It will cost this will be more expensive, but it turns out 3 in one: locking doors, connecting the security alarm and the automatic climb of lowered glasses.
It is worth noting that in the case of a traffic accident, all the doors are automatically unlocked. This is the transmission of the signal from the passive security control unit to the central control unit. And from the center leaves the team on the operation of the executive devices, the opening of all doors occurs.
Video about the reasons why the central castle does not work:
Electrical Schemes of the Central Castle
The TZZ control circuit for the machine VAZ 21099. It can also be used for VAZ 2110 and 2115 cars.
Connection diagram of the central lock on Mitsubishi Lancer 9 series.
Electroscham connecting to the central lock on Volkswagen Polo. Everything is carried out on one wire. For opening the doors, it is minus, and for closing - minus via a resistor in 1 com.
The diagram of the negative management of the CZ. It is often used in VAZ 2110 cars, as well as some other Japanese and Korean production cars.
Scheme of positive management CZ. Usually enjoy this scheme on American machines, for example, fordah - "Mondeo".
Video about the installation of the CH on Daewoo Sens:
Video about the installation of the system on the VAZ 2107:
