Vehicle that leans into turns with sub headlight unit or sub headlight system, and method for controlling a sub headlight unit or a sub headlight system for use in vehicle that leans into turns

摘要

To suppress occurrence of a situation where a rider feels uncomfortable about a change in an illumination range in the course of an increase or decrease in a lean angle of a vehicle body.;[SOLUTION];A sub headlight unit (13) for use in a vehicle (10) that leans into turns, the sub headlight unit including a right sub headlight light source (13Ra, 13Rb, 13Rc) that illuminates an area ahead and to the right of the vehicle and a left sub headlight light source (13La, 13Lb, 13Lc) that illuminates an area ahead and to the left of the vehicle. The right sub headlight light source and the left sub headlight light source are arranged between main headlight light sources (11H, 11L) provided in the vehicle, and configured to be turned on in accordance with a lean angle of the vehicle. The main headlight light sources are arranged at both left and right sides with respect to a width direction of the vehicle, and configured to illuminate an area ahead in front of the vehicle.