| 摘要 |
PROBLEM TO BE SOLVED: To provide an engine starting device 1 which can relax the shocks accompanying torque transmission on starting the engine and in the middle of cranking. SOLUTION: When an engine starting signal is inputted, an ECU 3 gradually increases field magnetic flux by gradually increasing a field current energized to a shunt-wound coil 4c of a DC motor 4. After that, a battery current is energized to a series-wound coil 4b and an armature 4a by turning ON an electromagnetic switch 5 (the energization to an exciting coil 5c). By this, the output torque of a starter is not drastically risen. The output torque is gradually increased together with the increase of the field magnetic flux. Accordingly, the generation of shocking torque can be suppressed during the energization to the DC motor 4. Large shocks are not applied to a torque transmission mechanism. As a result, the reliability of the starter can be secured. COPYRIGHT: (C)2005,JPO&NCIPI
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