| 摘要 |
An actuator for the change speed shaft of a motor vehicle automatic transmission comprises a housing, an actuating shaft rotatably mounted in the housing, an electric motor, a reversible, low-loss reduction gearing by which the rotor of the electric motor is directly coupled to the actuating shaft, a pretensioned spiral spring forming an energy storing means by which the actuating shaft may be driven into the parking position independently of the electric motor, an electronic controller for driving the electric motor as a function of control signals, a coupling means for coupling the actuating shaft to the change speed shaft of the automatic transmission. Rotation of the actuating shaft by the coupling means is converted into angles of rotation of the change speed shaft which correspond to the control signals. The actuator replaces a conventional gearshift lever on an automatic transmission. |
