Patent ID: 6626563
Filing Date: 2003-09-30
Classification: B60Q

Abstract:
An automatic optical-axis adjusting device for automatically adjusting an optical axis of at least one front light of a vehicle, said automatic optical-axis adjusting device comprising:a steering angle measuring means for measuring a steering angle of a steering wheel of said vehicle; a wheel speed measuring means for measuring left and right wheel speeds of left and right wheels of said vehicle, respectively; a swivel control means for adjusting said optical axis of said at least one front light by turning said optical axis of said at least one front light in a right or left direction based on said steering angle measured with said steering angle measuring means; a counter steering state determining means for determining whether said steering wheel is under a counter steering state, said steering wheel being determined to be under said counter steering state when: a steering direction of said steering wheel determined based on said steering angle does not coincide with a turning direction of said vehicle estimated based on a difference between said left wheel speed and said right wheel speed measured with said wheel speed measuring means; and a swivel modifying means for stopping or modifying adjustment of said optical axis of said at least one front light through said swivel control means when said counter steering state determining means determines that said steering wheel is under said counter steering state.