Automatic automobile headlamp leveling device

Abstract

An automatic headlamp leveling device is provided to reduce headlamp leveling from occurring during inappropriate times. Wherefore, an automatic automobile headlamp leveling device includes headlamps, each adapted to be driven by an actuator such that a light axis thereof is tilted up and/or down relative to a vehicle body, a control section for controlling the driving of the actuators according to various received vehicle conditions, a vehicle speed sensor, a pitch angle sensor, and a storage section for storing pitch angle data detected by the pitch angle sensor, the control section controlling the driving of the actuators based on the pitch angle data so detected such that the light axes of the headlamps always stay in a certain tilted state relative to the surface of a road, wherein the control section controls the driving of the actuators at certain intervals when the vehicle is at a stop, and when the vehicle is running, the control section controls the driving of the actuators only once, and wherein the control section judges it as an inappropriate leveling state when pitch angle data continues to be detected which differs from pitch angle data detected when the vehicle is at a stop by a predetermined value, so that headlamp leveling does not occur during vehicle turning and slaloming.