Sub headlight unit and sub headlight system for use in vehicle that leans into turns, and vehicle that leans into turns, and method for controlling light emission of a sub headlight unit

摘要

A sub headlight unit (13L, 13R) for use in a vehicle (10) that leans into turns includes a sub headlight light source (13La, 13Lb, 13Lc, 13Ra, 13Rb, 13Rc) that illuminates an area ahead and outward of the vehicle with respect to a width direction of the vehicle. The sub headlight light source is configured to, when the vehicle is in an upright state, produce an illumination range including a space above a horizontal plane. The sub headlight light source is turned on in accordance with a lean angle of the vehicle. At a time of parking or stopping or at a time of running straight ahead, the sub headlight light source is turned on or caused to flash with the amount of light per unit time being reduced as compared with the amount of light per unit time emitted when the sub headlight light source is turned on in accordance with the lean angle of the vehicle.