| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drive control circuit for a vehicular starter motor of a simple structure continuing electric power supply to a starter motor and starting an engine even if battery voltage drops to lower that minimum operable voltage of ECU and operation of ECU stops, and stopping drive of the starter motor after the engine start for improving reliability of engine start and merchantability. <P>SOLUTION: An NPN type first transistor 24 having a collector terminal connected to an exciting coil 14b of a starter relay 14 and an emitter terminal grounded, a self bias circuit 30, and an NPN type second transistor 32 having a collector terminal connected to a connection point of a first resistor and a second resistor and an emitter terminal grounded are provided. An electronic control unit CPU 38 is connected to a base terminal of the second transistor. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
