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The working principle and working process of headlight leveling motor
 Nov 24, 2021|View:300

The headlight leveling motor control principle is through the height position sensor input signal, through the algorithm converted into a voltage signal, by the headlight control module drive motor control headlight adjustment.


headlight leveling motor


Car headlights, also known as car headlights, car LED daytime running lights, as the eyes of the car, more closely linked to the night driving or bad weather conditions of safe driving. The use and maintenance of car lights should not be ignored. Electrically adjustable headlight is to fine-tune the headlight height by knob in the cab, mainly to meet the adjustment of the headlight height when the vehicle is fully loaded and half-loaded.

Headlight leveling motor principle - classification

Manual dimming system is divided into continuous type and step type. The difference between stepper dimming system and continuous dimming system is: stepper dimming system generally has several gears, using a stepper motor to drive the adjusting mechanism, near light tilt angle can only be adjusted to a few fixed positions; while continuous dimming system usually uses a DC motor or hydraulic system or pneumatic system to drive the adjusting mechanism, near light tilt angle can be continuously adjusted, no interruption point.

Continuous dimming system is divided into hydraulic, pneumatic, mechanical and electric types according to the principle of regulator. Electric regulator can be divided into built-in type and external type according to the installation position on the headlight. Built-in type is small, low noise, no need to seal and integrated into the lamp body, the disadvantage is not easy to replace; external type is relatively large, high noise, need their own seal, but easy to replace.

Headlight leveling motor principle - working principle

The manual dimming system is usually equipped in cars without air suspension, and the driver adjusts the tilt angle of the low beam light through a switch in the cab, which is usually installed in a place easily accessible to the driver. Its working process is: toggle the rotary switch, the internal resistance of the switch changes, that is, the input control signal to the electric regulator, causing changes in the regulator internal circuit system, the regulator internal circuit based on the set direction of rotation of the switch to control its DC motor forward or reverse rotation, high-speed rotation of the motor through the regulator internal gear transmission system and thread transmission system, the DC motor's high-speed rotary motion into low-speed forward or reverse rotation. The high speed rotating motor is converted into low speed forward or backward linear motion by the gear transmission system and thread transmission system inside the regulator, which enables the electric regulator to apply push or pull force to the headlight, thus changing the tilt angle of the low beam lighting, thus achieving the purpose of improving the lighting effect of the low beam.

Headlight leveling motor principle - working process

The adjustment switch is installed on the dashboard of the car, generally there are 5 gears: 0, 1, 2, 3 and the default gear, the actuator is the headlight adjuster installed in the headlight of the car (headlight adjusting screw top to the outside of the headlight luminous surface, when working with the adjustment of the switch, the headlight adjuster's knuckle screw for expansion and contraction movement, driving the headlight reflective surface movement adjustment, so as to adjust the reflected light focal length, to achieve the effect of adjusting the headlight.


headlamp leveling motor


When the load of the car changes, it will cause the change of the tilt angle of the body relative to the road, which will lead to the change of the lighting distance and lighting direction of the low beam. When the car adds extra load or accelerates sharply, the car will show the phenomenon of tail down and front up, which will lead to the dazzling of the driver of the oncoming car and at the same time will cause insufficient illumination of the road; when the car brakes suddenly, it will show the front down and tail up, when the direct vision distance may be shortened to about 10m.