According to driving environment and loading state of vehicle, head lamp lighting direction is changed to keep the driver's visibility range and to protect the driver's vision from glare, aiming at safety driving.
Sensor mounting on the rear center arm drives the actuator mounting on the head lamp since sensing the input signal following the vehicle's statical changes.
Head lamp beam is automatically operated by chassis tilt.
Compensation of headlamp visual range for changes in vehicle load.
Preventing oncoming traffic being blinded by excessive glare.
Meeting regulation
Suspension angle change resulted from vehicle's load change.
Height sensor signal change
Calculation of HLLD signal by AHLS ECU algorithm.
Sending a proper signal to HLLD (head lamp levelling device) and driving actuator.
Actuation of HLLD and compensation of headlamp beam range.
IGN1 ON & Head lamp low bean ON
Sensor angle changed over 1˚ and keeping 10~12seconds with vehicle standing.
Sensor angle changed over 1˚ and keeping 10~12seconds and when vehicle runs over 20km/h with constant speed.
Leveling control is off after controlling HLLD for few seconds.
To eliminate mechanical tolerance, the lamp position is always reached from the lower side.
Height sensor
No. | Components |
1 | Sensor mounting bracket |
2 | Height sensor and link |
3 | Link bracket |
4 | Assit arm (Chassis) |
5 | Mounting bolt with vehicle body |
6 | Mounting bolt with chassis |
Using a Micro-processor, percept the operation lever's mechanical angle change or speed signal.
As an actuator control device of inner control program, mounting on the rear center arm.
AHLS (auto head lamp leveling system) unit (A)
Calculation of HLLD signal by AHLS ECU algorithm.
HLLD (head lamp leveling device) actuator (A)
Change the head lamp lighting direction up or down since automatic head lamp levelling unit sensing the input signal following the vehicle's statical changes.
