Patent ID: 7014345
Filing Date: 2006-03-21
Classification: B60Q

Abstract:
1. An auto-leveling system for vehicle headlamp comprising: a headlamp an optical axis of which is tilted vertically to a vehicle body by driving an actuator; a control unit for controlling a drive of the actuator; a speed sensing means for sensing a speed of a vehicle; a pitch angle sensing means for sensing a pitch angle of the vehicle; and a headlamp lighting switch, whereby the control unit controls a drive of the actuator based on the pitch angle being sensed by the pitch angle sensing means independently of whether or not a posture of the vehicle is stabilized statically such that the optical axis of the headlamp is always set to a predetermined tilted state with respect to a road surface when the headlamp lighting switch is in an ON state; wherein the system has a daytime running light lighting deciding function and is constructed to alternatively select a dynamic auto-leveling process, which executes a drive control of the actuator independently of whether or not the posture of the vehicle is stabilized statically, and a static auto-leveling process, which executes the drive control of the actuator as far as the posture of the vehicle is stabilized statically, wherein the vehicle is statically stabilized when it moves at a substantially constant speed or is in a stopped state, and wherein the speed and acceleration are not substantially changed during a predetermined time period and the control unit is constructed to select the dynamic auto-leveling process when the headlamp light switch is in an ON state, and select the static auto-leveling process when the headlamp light switch is in an OFF state and a daytime running light is turned on.