Headlight follow-up steering system AFS: Usually the ordinary headlights installed on the car have a fixed illumination range. When the night car turns on a curve, because the illumination angle cannot be adjusted, a “blind zone†often appears on the inside of the curve, greatly Threatening the driver's safe driving at night. The general headlight follow-up steering system includes the AFS headlight intelligent follow-up system and the ALS optical axis automatic adjustment system. When turning at night, AFS can automatically adjust the illumination center of the low beam according to the speed of the vehicle and the steering angle of the steering wheel. , automatically points into the bend to ensure high visibility in the curve. When the rear load is heavy and the body angle is raised, the ALS automatically adjusts the tilt angle of the optical axis to avoid the interference of the optical axis to the driver on the opposite side.
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Lateral Auxiliary Illumination: The purpose of the lateral auxiliary illuminator is to illuminate the blind spot at night. The biggest difference in following the headlight AFS is the way it works. AFS is achieved by rotating (moving) the reflector and the bulb as a whole, that is, adding a motion mechanism to the original group of far and near light. The side-assist illumination system subtly has a small light bulb with a special angle inside the headlight. Only when the steering wheel is rotated to a certain angle range, the small bulb will light up, and when the small bulb is lit, it can provide a curve. Illumination in the blind spot. In principle, the lateral auxiliary lighting is a bit of a good taste, but the actual effect? And look at the decomposition below.
"High with triumph equipment with steering headlights"
AFS headlights follow-up steering system needs to arrange a set of moving mechanism in the lamp group to drive the bulb and the lamp cup to rotate (the specific transmission mode is slightly different for each manufacturer, but the principle is the same), the timing and range of the movement are all driven by the driving computer. control. The driving computer collects various information such as the speed of the vehicle and the steering wheel angle, and then issues a command to the transmission mechanism to adjust the beam of the headlight in real time according to the specific driving condition. The implementation of the AFS function requires a complete set of system matching and necessary action mechanisms, so the impact on vehicle cost is quite obvious.
In terms of the actual lighting effect, the beam of the headlights turns to the inside of the curve in a timely manner as the steering wheel rotates. Before the vehicle has reached the center of the bend, it can already illuminate the blind spot inside the curve, while leaving the road ahead of the curve. The effective light will also be more than the general headlights. In short, the driver can clearly see the road conditions farther away. If there are pedestrians or obstacles in the corners, having the AFS function will detect these conditions earlier than the average vehicle.
After the actual experience, the front end lateral displacement of the headlight beam is about one meter to two meters. In fact, the angle at which the bulb needs to be rotated is very small, about 3 to 5 degrees. It can be seen that the steering of the drive bulb requires a very precise transmission mechanism, and it also leaves us with questions about system reliability and maintenance costs. It is necessary to know that the chance of the headlights being scrapped is extremely high in the event of a frontal impact.
When the AFS follow-up headlights were used by more and more manufacturers, the clever engineers suddenly thought, why must we use such a complicated mechanism to turn the headlights? Isn't it enough to have a light bulb inside the headlight that is specifically used to illuminate the inside of the corner? Under such a concept, the lateral auxiliary lighting system of the curve was born. The biggest difference with AFS is that it saves a lot of motives and lower maintenance costs. So will the actual effect be better?
The lateral auxiliary lighting system does not need to affect the original far and near light structure at all, only the engineers need to match the angle of the auxiliary light bulb and the timing of lighting. In other words, it does not change the range of illumination of the original headlights, but only illuminates the blind areas within the bend on the basis of the original. Therefore, the lateral illumination range of the auxiliary illumination system is relatively wider than AFS. When I first used a long-term car experience with a sports MPV, I first experienced the "power" of the side-aided lighting system for the first time. It can be seen that the engineers spent a lot of thoughts on the training. The timing of the auxiliary lights is just the moment when the author's line of sight turns to the inside of the curve, and the actual lighting effect is very impressive. The brightness and range can meet a variety of different driving. situation.
Lateral auxiliary lighting Even if the vehicle is not in a running state, the auxiliary light bulb will still light up as long as the steering wheel is turned, and it is very convenient to drive at night without a street light, especially when it is necessary to turn around.
"Ford McCos equipped steering auxiliary headlights"
So, is there a driving computer to control the auxiliary light bulb or a touch switch directly inside the steering wheel mechanism? According to the author's observation, in the case of two different D and R gears, the steering wheel is turned in the same direction, but the illuminated side auxiliary bulbs are different, that is, the lighting of the left and right auxiliary bulbs and the steering of the steering wheel There is no necessary connection, so it can be inferred that the opening and closing of the auxiliary lights is still controlled by the driving computer.
Conclusion: After reading the article, there may be questions from the riders. Since the technology of lateral illumination is so mature, why not just adjust the angle of reflection of the light cup, or set up several brightly lit lateral light bulbs to make the headlights The range of lateral illumination has increased greatly. Does this completely solve the problem of blind corners? The truth is not true, because driving on the road, we need to consider not only ourselves, but also other road users. Increasing the scope of illumination will inevitably affect the vehicles on the opposite side. The reason is the same as blindly using the high beam. Why is it necessary to build your own happiness on the suffering of others?
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