Headlamp Alignment Control Module: Description and Operation

AUTO HEADLAMP LEVELLING DEVICE

DESCRIPTION
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 integrated ECU 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.

OPERATING PROCEDURE

1. Suspension angle change resulted from vehicle's load change.
2. Sensor angle change.
3. Microprocessor calculates necessary head lamp angle change amount.
4. Sending a proper signal to head lamp levelling device and driving actuator.

OPERATING CONDITION

1. Ignition on.
2. Low beam on.
3. On stop : If sensor lever change is 2° and above, head lamp is operated after max. 1.5 sec.
4. On driving : If vehicle velocity is over 4km/h, velocity change is not over 0.8 - 1.6 km/h per second, and loading condition is changed, then head lamp is operated.

System Block Diagram:

System Block Diagram