| 摘要 |
An engine starter/generator has a rotor which rotates on excitation caused by an exciting winding, a speed reducer which reduces the speed of rotation of the rotor, a first clutch which transmits the rotation of the rotor, the speed of which has been reduced through the speed reducer, to an output shaft of an engine, and a second clutch which is disposed between the engine output shaft and the rotor to connect together these two members when the speed of rotation of the engine output shaft is greater than that of the rotor. The speed reducer and at least either one of the first and second clutches are disposed substantially axially in line with one another. This arrangement reduces the radial dimension of the engine starter/generator. It can, therefore, be disposed with in the engine room of a vehicle without difficulty.
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