The car turn signal means that when the vehicle turns, by turning on the flashing indicator in the corresponding direction, the pedestrian or the vehicle in front of or behind the vehicle is warned, and the direction of the car is prompted.
A car turn signal is a light that acts as a warning to pedestrians or vehicles in front of or behind a car when the vehicle turns.
What is a car turning signal ?
According to the use of materials, automotive turn signals can be divided into: 1, gas car turn signals; 2, LED car turn signals.
If Divided by the base, divided into: 1, P21W; 2, PY21W; 3, W21W; 4, P27W; 5, W5W; 6, H5W.
If divided by location, divided into: 1, the front turn signal; 2, rear turn signal; 3, side turn signal.
How turning signals work ?
First, the lamp uses a xenon lamp and the SCM controls the circuit. The left and right rotation flashes work continuously.
Second, the use of flashers: According to their different structures, can be divided into resistance wire, capacitive and electronic three. Resistance wire type can be divided into hot wire type (electric heating type) and wing type (spring type), while electronic type can be divided into hybrid type (with contact type relay and electronic components) and all electronic type (without relay ). For example, a bouncing flasher utilizes the principle of current heating effect, and uses thermal expansion and contraction as a driving force to cause a sudden movement of a spring sheet to turn contacts on and off and realize light flicker.
What are turn signal light ?
1. According to the classification of materials:
Gas car turn signal
Gas car turning lights, that is, the use of gas, such as halogen. Gas car turn signals, mature technology, low prices, but it will produce radiation, which contains mercury, the outer shell is made of glass, easily broken, resulting in pollution of the environment.
LED car turn signal
LED car turn signal, that is, the material used is LED. The automobile turning lights made of LED have no radiation, no pollution, and have a long service life. The theory has reached 50,000 hours, that is, there is no need to change the light bulb during the scrapping of automobiles. However, the price of LED car turn signals is relatively expensive, so it has a certain influence on its popularization. In the developed countries, a large number of LED car steering lights have been used.
2. According to the classification of the base :
P21W, power is 21W, bulb diameter is 26.5mm, total length is 52.5mm, also can be called BA15S or 1156. The resulting bulb can be called a spherical bulb. Commonly used models such as Swift, Peugeot 206 and so on. Can be used as a front or rear turn signal, but mostly for rear turn signals.
PY21W, the power is 21W, the bulb diameter is 26.5mm, the total length is 52.5mm, also can be called BAU15S, the shape resembles P21W, except that two antennae are 150 degrees, and P21W is 180 degrees. Commonly used models such as BYD F3, Mercedes-Benz S series. Can be used as a front or rear turn signal, but mostly for front turn signals.
W21W, the power is 21W, bulb diameter is T20-T25, also known as 7440. Commonly used models such as Jeep-Orange. Can be used as a front turn signal or rear turn signal, mostly used in Japanese models.
P27W, power is 27W, bulb diameter is T20-T25, also can be called 3156. Can be used as a front or rear turn signal.
W5W, the power is 5W, the bulb diameter is 10.29mm, the total length is 26.8mm, and the lamp head is expressed as W2.1 x 9.5d. W5W can be called a straight plug or a flat plug. The resulting bulb can be called a wedge bulb. Used as a side turn signal, common models such as BYD F3, Swift, etc.
H5W, power is 5W, bulb diameter is 9.0mm, total length is 33.0mm, lamp cap is expressed as BA 9s. The resulting bulb can be called a spherical bulb. Used as a side turn signal.
3. By location description
Front turn signal
The front turn signal, mounted next to the car headlights, is used to alert the front vehicle when cornering.
Rear turn signal
The rear turn signal, installed at the rear of the car, is used to alert the rear vehicle when cornering.
Side turn signal
The side turn signal, installed next to the door of the first cab or mounted on the rearview mirror, is used to warn the next vehicle when cornering.