| 摘要 |
A steering actuator comprising an intermediate shaft, an electric motor, a transmission, a first stopping device, a second stopping device, and a controller is provided. The steering column transmits a first rotational force to the intermediate shaft. The electric motor generates a second rotational force on a rotor shaft upon application of an electric current. The transmission transmits either or both of the first rotational force and the second rotational force to a lower shaft of a steering gear. The first stopping device prevents the first rotational force from being transmitted to the rotor shaft. Similarly, the second stopping device prevents the second rotational force from being transmitted to the steering column. The controller operates the steering actuator in a first mode, a second mode, or a third mode by selectively applying the electric current to the electric motor and the stopping devices.
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