Apparatus for automatically adjusting direction of light axis of vehicle headlight

An apparatus for adjusting a direction of a light axis of an auxiliary headlight of a vehicle comprising:

• a steered angle sensor detecting a steered angle of a steering wheel of a vehicle;
• a vehicle speed sensor detecting a vehicle speed of said vehicle;
• a turning radius calculating device calculating a turning radius of said vehicle;
• and
• a control unit performing a swivel control by which a light axis of an auxiliary headlight of said vehicle is adjusted to a target direction determined depending on said steered angle detected by said steered angle sensor and said vehicle speed detected by said vehicle speed sensor;
• wherein said control unit controls said auxiliary headlight to be in an off state while said turning radius calculated by said turning radius calculating device is equal to or larger than a predetermined threshold, and allows said auxiliary headlight to be in an on state while said turning radius calculated by said turning radius calculating device is smaller than said predetermined threshold.