| 摘要 |
<p>An emergency call system with a battery switching function and provided with an auxiliary battery (6), wherein au arithmetic control unit (2); always monitors a vehicle-mounted battery voltage (+B), an ACC voltage applied during an engine operation and the voltage of the auxiliary battery (6); switches a voltage to both the battery voltage (+B) and the ACC voltage to activate the emergency call system while the engine is running, both the battery voltage (+B) and the ACC voltage are 8V or higher and an emergency is not effected; switches a voltage to the battery voltage only while the engine is not running, the battery voltage is 8V or higher and an emergency is not effected; and otherwise drives the emergency call system with the auxiliary battery (6) only. <IMAGE></p> |
