Maintenance of car headlights

It is well known that a car is a good car maintenance that needs to be maintained as the number of roads increases. It not only prolongs the service life of the car, but also ensures the safety of the driver. The car headlights are the most critical item in car maintenance. The use of time car headlights will have some problems more or less, many car owners will not maintain their car headlights, then how to maintain the car headlights? Here are some of the relevant knowledge about car headlight maintenance that Xiaobian has compiled for the riders.

First, the halogen lamp

A halogen lamp is actually a special kind of incandescent lamp. The principle is that when a current flows through the resistor, it will generate heat. When the temperature is high enough, the black body radiation with a wavelength in the visible light band will be emitted. There are generally two types of halogen lamps: iodine tungsten lamps and bromine tungsten lamps. When the incandescent lamp is lit, although the filament temperature does not exceed the melting point and boiling point of tungsten, a small amount of tungsten is volatilized at a high temperature. When the volatilized tungsten atoms encounter a cold bulb envelope, they will condense and precipitate. Over time, the bulb shell will accumulate a blackened tungsten film. Ordinary incandescent lamps have been used for a long time.

If the bulb is filled with some iodine, when the bulb is lit, the iodine will volatilize into a gas, and the iodine vapor will react with the colder tungsten to form a low-boiling compound, tungsten iodide, which will make the bulb envelope. The precipitated tungsten volatilizes. The tungsten iodide gas decomposes at high temperatures. When the tungsten iodide gas encounters the filament, it decomposes, leaving the tungsten on the filament, while the iodine continues to liberate in the form of a gas between the filament and the outer casing. When it comes to the bulb casing again, it will be on the outer casing. The tungsten reaction, on the one hand, the filament continuously volatilizes the tungsten onto the bulb casing, and on the other hand, the iodine continuously transports the tungsten back to the filament, so that the speed of filament evaporation is greatly reduced, and the life of the bulb is prolonged. Therefore, it is possible to manufacture a incandescent lamp with a large power using a iodine-tungsten lamp. If no halogen is added, if the ordinary incandescent lamp is so powerful, the life will be short and difficult to use. Halogen lamps have been widely used in automotive lighting.

Second, Xenon lights

The full name of Xenon headlights is HID (High Intensity Discharge Lamp) gas discharge lamp, which uses the matching electronic ballast to instantly raise the 12V voltage of the car battery to a trigger voltage of 23KV or more, and ionize the helium gas in the xenon headlight to form an arc discharge. It makes it stable and provides a stable car headlight illumination system. Compared with ordinary halogen bulbs, xenon bulbs have two significant advantages: on the one hand, xenon bulbs have three times the light intensity than ordinary halogen bulbs, but consume only two-thirds of the energy; on the other hand, xenon bulbs are used with daylight. Nearly the same light color creates better visual conditions for the driver. Xenon lamps provide a wider range of illumination and greater light intensity, greatly improving the safety and comfort of driving.

Halogen lamps have the same filament as ordinary bulbs, while xenon lamps have no filaments. This is the most important difference between xenon lamps and traditional lamps. The xenon lamp is illuminated by an electric arc generated by a discharger between the two electrodes, like the bright light of an electric arc generated in electric welding. High-voltage pulsed electricity is applied between the metal electrodes in the fully enclosed micro-quartz bulb, and the material in the excitation bulb (helium, a small amount of mercury vapor, metal halide) is ionized in the arc to produce light.

This bright color temperature is similar to that of sunlight, but it contains more green and blue components, so it appears blue-white. This blue-and-white light greatly increases the brightness of road signs and signs. The xenon lamp emits more than twice the luminous flux of the halogen lamp, and the efficiency of converting electrical energy into light energy is also more than 70% higher than that of the halogen lamp. Therefore, the xenon lamp has a relatively high energy density and light intensity, and the operating current is only half of that of the halogen lamp. . The increased brightness of the lights also effectively expands the visual range in front of the car, creating a safer driving condition.

Third, LED lights

LED is the abbreviation of Light Emitting Diode, commonly known as LED. They are often used in the role of light boxes, signs and various electrical indicators and backlights. They are also car headlights, taillights, high-position brake lights, and daytime driving. An important component of the lamp. Compared with xenon lamps and halogen lamps, LEDs have higher luminous efficiency and consume only 1/20th of the cost of halogen lamps. In addition, the cost of LED components has been greatly reduced year by year, and the current cost and price are still more than 20% per year. decline.

In addition to energy saving and low cost, LED headlights have a long life span. The service life of LEDs is up to 100,000 hours. There is basically no need to replace the design life of the whole vehicle. In addition, LEDs have excellent impact resistance and shock resistance due to their special structure. It is not easy to break and can adapt well to various environments. The LED components are also small in size, compact and easy to arrange and design.

LED lighting only needs microsecond level, it can be quickly illuminated on taillights and turn signals to achieve better warning effect. It is used on headlights and has higher response speed than xenon lamps and halogen headlights. Driving safety has a better guarantee. The LED has high brightness and the brightness of the light is much lower than that of the halogen lamp. It is suitable for warning lights such as lighting and brake lights and turn signals. Low-voltage DC can be driven, the load is small, the interference is weak, the requirements for the use environment are low, and the adaptability is good. There is no need for a booster like a xenon lamp.

If the vehicle is driving 50,000 kilometers or more, it is necessary to check the brightness of the lights in time. After the headlights are lit for a period of time, the brightness will be lower than the original due to oxidation, power loss, etc., and will continue to decrease with the use of time; the headlights are the "eyes" of the car, and the car is safe in the dark. The driving guarantee, the normal working and good performance of the lights can reduce the accident. So how to maintain such an important part? First, check daily whether the lights are working properly.

Daily inspection of the lights is not as simple as a glance. When checking the lights, check that different types of lights (such as turn signals, tail lights, fog lights, etc.) are working properly. In addition, it is necessary to check whether the direction of illumination of the headlights is offset and whether the brightness of the light is sufficient. Also replace the lamp regularly. The bulb of a car headlight is a consumable and has its own life. When the light bulb is used for a long time, it will become darker, and the irradiation distance will become shorter, which directly affects driving in the night. It is a very big safety hazard. Therefore, once the bulb is found to be dark, or the brightness of the two bulbs is different, it must be replaced in time to ensure safe driving. In addition, do not touch the light directly when changing the bulb to avoid polluting the bulb and reducing the service life of the bulb.

After washing the engine compartment, the water should be dried. The engine compartment of a car needs to be cleaned regularly, but the water must be dried after washing. Otherwise, when using the car, as the engine compartment temperature rises, the residual water in the engine compartment will become water vapor, which can easily enter the headlights from the engine compartment, resulting in the lamp not being used normally. Also check the lights in time. If the car has bumps and bumps, resulting in cracks in the lights, then do not drag and pull, you must go to the repair shop for repairs. If there is a crack in the lamp, the air will enter the lamp, causing the lamp to malfunction and the lamp not working properly .

The length of life of an item depends largely on whether the habit of using the item is scientific and reasonable. The correct way to use the lights is: start the car - turn on the lights; turn off the lights - turn off the car. Develop good habits. Use a good quality light bulb to use safety and peace of mind. Finally, remind drivers and friends to repair and modify the lights, try to go to a professional store, so as not to cause unnecessary trouble and loss.

The above is some of the relevant knowledge about car headlight maintenance that Xiaobian has compiled for the riders. I hope that the riders can learn something useful.