Vehicle approach alert device for saddle-ridden electric vehicle

摘要

A vehicle approach alert device for a saddle-ridden electric vehicle is a vehicle approach alert device for a saddle-ridden electric vehicle that is provided with a sound emitter that is attached on the vehicle body of a saddle-ridden electric vehicle having an electric motor in a power engine, and that emits an alert sound to a surrounding area for notifying the surrounding area of approach of the saddle-ridden electric vehicle, such that sound emission of the sound emitter is controlled, and the sound emitter is arranged so that the direction of sound emission is oriented diagonally downward and forward of the saddle-ridden electric vehicle.

主权项

1. A vehicle approach alert device for a saddle-ridden electric vehicle that is attached to a vehicle body of the saddle-ridden electric vehicle having an electric motor included in a power engine, and that is provided with a sound emitter that emits an alert sound to a surrounding area for notifying the surrounding area of an approach of the saddle-ridden electric vehicle, wherein:
the alert sound of the sound emitter is controlled according to a traveling status of the saddle-ridden electric vehicle; the sound emitter is arranged so that a direction of the alert sound is oriented diagonally downward and forward of the saddle-ridden electric vehicle, the sound emitter raises a frequency of the alert sound with an increase in a rotation speed of the electric motor, an increase rate of this alert sound frequency is set so as to be lower than an increase rate of the rotation speed of the electric motor, and the alert sound is set to be in a range between 100 Hz and 800 Hz and includes:
a first sound having a frequency and serving as a reference sound,a second sound having a frequency higher than the frequency of the first sound,a third sound having a frequency higher than the frequency of the second sound, and a difference of 1 subtracted from a ratio of the frequency of the second sound with respect to the frequency of the first sound is set to be greater than a difference of a ratio of the frequency of the second sound with respect to the frequency of the first sound subtracted from a ratio of the frequency of the third sound with respect to the frequency of the first sound.