| 摘要 |
PURPOSE:To make a lamp selectable to a lighting system by means of a battery automatically at a low range of engine speed, by installing a switching circuit in an electric circuit ranging from the battery to the lamp. CONSTITUTION:A switching circuit 23 is made up of a diode D being inserted into a space between a line 6 of a lamp 10 and a line 13 of a battery 11. The diode D compares voltage obtainable from a charging-lighting coil 1 via rectifier diodes 4 and 5 with voltage of the battery 11, and when an engine speed is high and voltage from the charging-lighting coil 1 is higher than output voltage of the battery 11, the diode D becomes nonconductible. Therefore, the lamp 10 is lighted by the voltage obtained through these rectifier diodes 4 and 5 rather than a generator. On the other hand, when the engine speed is low, the voltage of the battery 11 comes higher than the output of the charging-lighting coil 1 so that the lamp 10 is lighted by the battery 11. |
