AUTOMATIC POWER INTERRUPTING SYSTEM FOR VEHICULAR CONTROL CIRCUIT

摘要

Herein disclosed is an automatic power interrupting system for a vehicular control circuit, which comprises: a relay switch having a normally open contact connected between a power source and the supply terminal of a control circuit and a relay coil connected with the power source; a normally open control switch connected between the power source and the supply terminal and with the signal input terminal of the control circuit and adapted to be turned on only when an external force is applied thereto; revolution detecting means for detecting the revolutions of an engine; and switching means for turning on the relay switch, when the power is supplied to the control circuit, and off the relay switch after a predetermined time period by measuring the time period after the stop of the engine revolutions on the basis of a detection signal outputted from the revolution detecting means. Also disclosed is an automatic power interrupting system for a vehicular control circuit, which comprises: a kill switch connected together with an ignition circuit with a power source; a relay switch having a normally open contact connected between the power source and the supply terminal of the control circuit and a relay coil connected between the power source and the signal output terminal of the control circuit; a starter switch connected together with a starter between the power source and the supply terminal and with the signal input terminal of the control circuit; revolution detecting means for detecting the revolutions of the engine; and switching means for turning on the relay switch, when the power is supplied to the control circuit, and off the relay switch after a predetermined time period by measuring the time period after the stop of the engine revolutions on the basis of a detection signal outputted from the revolution detecting means.