| 摘要 |
<p>PURPOSE:To issue alarm when the engine is started without a key, after the driver has stopped the engine, leaving the key is alarmed when the door is opened wihout pulling out the key. CONSTITUTION:A key switch 6 is at the contact point 6b only when the key is pulled out, the door switch 7 is turned on only when the door is opened, a hydraulic switch 8 is turned on only when the oil pump does not operates, the negative pressure switch 9 is turned on due to suction negative pressure of the engine which runs at the speed more than idling speed. After the engine has been stopped, when the door is opened without pulling out the key, the contact point 6a and switch 7, 8 are turned on, the alarm 10 operates only for the period which the timer 11 is set. For this period, an illuminant element 13a issues, receiving light element 13 is conducted, all switch 6-9 are short circuitted to maintain the operation of the alarm 10.</p> |
