DRIVING DEVICE FOR VEHICLE OCCUPANT CRASH PROTECTION DEVICE,申请号JP19960004417-传众专利搜索

DRIVING DEVICE FOR VEHICLE OCCUPANT CRASH PROTECTION DEVICE

申请公布号：JPH08239006(A)

申请号：JP19960004417

申请日期：1996.01.12

申请公布日期：1996.09.17

申请人：

KANSEI CORP

发明人：TSURUSHIMA SHINICHIRO;KANEKO KUNIHIRO;KIN KAZUYOSHI

分类号：B60R21/16;(IPC1-7):B60R21/32

主分类号：B60R21/16

摘要：PURPOSE: To start a device positively even when its charged voltage lowers, in a simplified circuit, by detecting photoelectric voltage of an auxiliary power supply in a control circuit and controlling pulse width of a trigger signal in inverse proportion to the charged voltage. CONSTITUTION: Output voltage of a vehicle-mounted battery 1 is raised in a stepped voltage doubling circuit 2 and thus supplied to an auxiliary power supply 3. Output voltage Vc of the auxiliary power supply 3 is monitored in a pulse width variable circuit 4 in a control circuit 4. At the time of a collision, the control circuit 4 outputs a control signal S to a switching element 6 on the basis of a detection signal of an acceleration sensor 5. And thus, the switching element 6 turns on, so that an ignition device 7 is ignited from the auxiliary power supply 3. In this case, power supply time necessary for driving the ignition device is determined from output voltage of the auxiliary power supply 3 at the time of ignition, in the pulse width variable circuit 4a. The time when an integration of sampling value of the output voltage becomes a value corresponding to a predetermined power quantity is taken as the duration of power supply time. Thus, the power supply time is inversely proportional to the output voltage.