| 摘要 |
<p>PURPOSE:To prevent the operation of a turning on/off device from becoming unstable by shutting off an automatic lighting means from the power source so as to inhibit the automatic lighting of the illumination until an engine starts rotation and a generator generates more output than the specified value. CONSTITUTION:When an engine is started after putting an illumination turning on/off device E in an automatic control condition by a lighting switch 40, an alternator 10 is driven. Since the revolution number of an engine is below the specified value at the start, a regulator 20 makes each transistor Tr21, 22 nonconductive and Tr conductive under the action of a control circuit 24. In this condition, a power source circuit 90 is maintained in a reset condition and restarted without bringing about the automatic lighting of a front illumination 50 by the turning on/off device E. Thereafter when the revolution number of the engine becomes above the specified value the regulator 20 makes Tr21, 22 conductive and Tr23 nonconductive and with the operation of the power source circuit 90, fixed voltage is generated and the turning on/off device E is put in a condition capable of operating.</p> |
