Issue 24 comfortable and safety systems (iv) — deep exploration of electric skylights
The electric skylight, an important feature in modern vehicle configuration, not only increases the comfort of driving, but also plays an indispensable role in safety. During this period, we will explore in depth the working principles of electric skylights, their use techniques and the practical value of day-to-day driving。
I. Structuring and working machinery of electric skylights
An electric skylight, as a high-end configuration in modern vehicles, is constructed and operating machinery that deserves in-depth exploration. It consists mainly of elements such as skylight glass, power drives, control systems, etc., which are accurately controlled by electric power-driven and control systems to enable the opening, closing and tilting of skylights. This configuration not only enhances the comfort of the ride, but also provides many security advantages。
1. Composition of the electric skylight
The components of the electric skylight include the skylight control switch, the limit switch, the skylight motor and the skylight control module. Among them, the skylight motor is the core component, which provides power for the opening of the skylight through a moving device and is capable of moving in both directions. By changing the direction of the current, it is easy to change the direction of the motor and thus to control the opening of the skylight。
(2) control switches
The control switch covers both the slide switch and the tilt switch. The slide switch has three locations: slide open, slide close and disconnect. The slash-up switches are equally slash-up, tilt-down and disconnect three slots. The operation of these switches will have a direct impact on the direction of the electrical drive of the skylight drive, thus achieving closure control of the skylight。
The core function of the limit switch is to detect the current position of the skylight. It achieves the disconnection and closure of switches by shifting the cam. Cams, as an important component of the power output end of the drive agency, can be rotated by driving gears and sliding screws at the time of the power output. The condensed part of the cam will trigger the switch, thus achieving automatic control of the skylight。
The control module, as a digitally controlled circuit, is internally equipped with timers, beepers and relays. The working method is to receive the information entered by the switch and, after the logical operation of the digital circuit, to determine the actions of the relay, thereby achieving precision control over the opening of the skylight。
2. Activation of electric skylights
The controlled circuits of the electric skylight are designed as follows。
1. Open the skylight
When the ignition switch is connected and the skylight switch is pressed to the “open” position, the signal is sent to the skylight control module. At this point, the limit switch no. 2 was activated and relays began to work, driving the motors and opening the skylight。
(2) the skylight is closed
If the skylight switch is pressed to the “close” position when the window is fully open on the day and both the 1st and 2nd limit switches are activated, the signal is also sent to the skylight control module. Relays work under this signal, and the motor turns, and the skylights close。
(3) upwards
Following the ignition switch, if the skylight is completely closed and the skylight switch is tilted upward, the signal will be sent to the skylight control module. Relays responded to the signal, and the motors began to rotate and tilt the skylight upwards。
(4) tilt down
The signal is sent to the skylight module if the skylight switch is pressed down to the point where it is tilted downward when the ignition switch is connected and both the 1 and 2 limit switches are disconnected. Relays work under this drive, and the motors rotate and tilt the skylight downwards。
(5) tilt-tip-tip system
The skylight control module activates the beeper and sends a sound to remind the driver of the current state of the skylight when the window is tilted upward on the same day。
Ii. Diagnosis and removal of common malfunctions in electric skylights
Possible malfunctions in the electric skylight include the complete inability to work of the sliding skylight system and the sudden suspension of the slide skylight operation。
1. Sliding the skylight system cannot be activated
Possible causes:
