1 central control door locks
is referred to as central locking central control door locks. In order to improve safety and driving convenience of car use, more and more modern car central locking installation.
First, the central locking function
1, the central control: when the driver door is locked in its side, the other door is also locked, the driver each door can be opened by the door lock switch at the same time, you can open a single door.
2, speed control: when the driving speed reaches a certain time, each on their own door lock, door handle to prevent erroneous operation caused by the passenger door is open.
3, the individual control: in other than the driver’s side door, the other door is also provided a separate spring lock switch can be controlled independently and open a locked door.
Second, the central locking structure
tops car central locking type with a lot, but the basic composition of the main door switch, door lock actuators, and lock controller.
1, the door lock switch: the majority of the switches are controlled by the negative master switch and sub-switches, with a total switch mounted on the driver’s side door, the entire vehicle operator actuated switch may be a total of all a door lock and opening; each sub-switch mounted on the other door, a door can be controlled separately.
2, the door lock actuator: central locking means is executed instructions for performing a driver, or opening the door lock. An electromagnetic door lock actuators, DC motors and permanent magnet type motor driven type three kinds of ways. Its structure is doors or door opening operation is performed by changing the polarity switching its direction of movement
(1) Electromagnetic: It is equipped with two coils, respectively, to open, the door lock, the door focus lock operation button is normally in the neutral position. To lock the door when the forward current through the coil, the armature left drive lever, the door is locked; to open when a reverse current through the coil, the armature right drive rod, in addition to the door is opened.
(2) DC motor formula: and it is rotated by drive means (drive means has a screw drive, a rack-and-gear drive) the power to the lock latch by a DC motor, so that the door lock buckles were open or locked. Since the DC motor is achieved bi-directionally rotatable locking or door opened by reversing the motor. This electromagnetic actuator compared with the implementing agencies, small power consumption.
(3) a permanent magnet motor formula: a permanent magnet motor is a multi-type permanent magnet synchronous motor means. Its role is substantially the same with the first two, quite different structure. Rotor with teeth, small teeth poles and the stator flux and large radial gap. A plurality of electromagnetic stator with axially uniform poles, and radially arranged in each solenoid. The stator core circumferential fabric, a coil wound on each core, when the current through the coil of a phase, the core of the coil is generated by suction on the movable teeth aligned rotor poles of the stator coil, the rotor will be turned to the minimum at flux, means one step position. To make a continued rotation step angle of the rotor, the stator coil according to the rotation direction of the next desired phase after a pulse current input to the rotor rotation. When the rotor rotates, so that even by the door lock or open.
3, lock controller
lock controller is to provide door lock actuator locking / opening control means of the pulse current. Regardless of the door lock mechanism is performed by changing the energizing current to control the direction of movement around the actuator rod to achieve and lock the door opening. Many different types of
lock controller, according to the control principle can be divided into a transistor, capacitive and inductive car with three kinds of lock controller.
(1) Transistor formula: internal door station controller transistor has two relays, a lock tube, a tube open. A transistor switching circuit control relay, integrated by the capacitor during charging and discharging control of constant pulse current duration, so that the actuator for locking and unlocking the door opening operation is completed.
(2) capacitance: the lock controller by the capacitor charge and discharge characteristics, usually the capacitor is fully charged, it work access control circuit, to discharge the capacitor, the relay is energized and the short pull, after the capacitor is fully discharged, so the contacts open by interrupting the current relay, the system will not lock.
(3) The vehicle speed induction. With a speed of 10km / h of the sensor switch when the vehicle speed is greater than 10km / h, if the door is not locked, without driver’s hands, the door lock controller automatically locked.
Third, the remote central locking principle
The wireless remote central locking function is a function key without the key inserted into the keyhole and can be remotely door lock door, its biggest advantage is: no matter day and night, no proven keyhole, you can remotely, easily unlock (open) and blocking (lock).
The basic principle is that the remote control: faint radio waves from the owner side, the radio signal received by the car antenna, a signal via the electronic controller ECU identification codes, then the system by the actuator (electric motor or an electromagnetic coil Manager ) perform start / lockout action. The system is mainly composed of two portions of the transmitter and receiver.
1, the transmitter
by a transmit switch transmitter, the transmitting antenna (keypad), integrated circuits and other components. In the keypad integrally with signal transmission circuit. Identification code from the storage circuit to the FSK modulation circuit, since the single-chip integrated circuit which miniaturization, on the opposite side with a snap type lithium battery circuit. Good radio transmission frequency according to the country of use selected, generally? 27,40,62MHz band used. Each snap switch by transmitting a signal for transmission once.
2, the receiver
The transmitter identification codes sent using FM modulation, the FM reception through the car antenna, and a dispenser enters an FM receiver frequency amplifier ECU processor decompresses transfer, the identification code is compared with the regulator solution; if the code is correct, the input control circuit to the actuator and the work.
The remote control system usually consists lock a portable transmitter unit and a vehicle receiver, identifiable signal from the transmitter is received and decoded by the receiver, door lock opening or lock the drive, its main role is to facilitate the driver to lock the door or open the door.
The user can set the remote control door lock ECU unlock password protection for a car of their own, and in the event of an alarm when unauthorized opening the door. Hu systems currently most used as radio waves or infrared identification signal impart media, there hold the key in two type and integral type.
Modern which received positive lockCorrect code signal, the control circuit is triggered wave receiving reception time added to 0.5s, and then returns to the standby state. The input signal codes do not match, the receiving circuit will not be triggered. Yl discrepancies than 10 codes the input signal within 10min, the lock attempt was considered car theft, then stop receiving any signal, including receiving the correct code signal, in which case the door with a key must be inserted by the vehicle owner is mechanically keyhole to open the door. Restoring the received signal, activated by the ignition key and the keyless entry system turn off the main switch on again immediately after, fruit with a remote door unlocking means is not open to the 30s, the doors are automatically locked.